Note: Descriptions are shown in the official language in which they were submitted.
CA 02551272 2008-11-06
J . =
Apparatus And Method For Recording And Reproducing A Video
Signal With Camera Setting Data
BACRGROtTND OF THE INVENTION
The present invention relates to apparatus and method
for recording and reproducing a video signal with camera setting
data and, more particularly, to a camera having a video tape
recorder integrated therein which is operable to record and
reproduce a video signal along with camera setting data which
identifies the various settings of the camera during imaging of a
video image. -
As is known, a combination camera/video tape recorder,
known as a camcorder, images a video image to produce a video
signal and records the video signal on a magnetic tape. Like
ordinary still cameras, various settings of the camcorder are
manually or automatically adjusted prior to and during the
imaging of the video image so that the highest quality of picture
can be obtained. The camera settings that are adjusted generally
include the iris setting, the shutter speed, and the gain and
white balance.
Cameras with video tape recorders integrated therein
are known to insert certain information signals, for example,
closed caption, VBID and EDTV2 type signals, in the vertical
blanking intervals of a video signal prior to recording the video
signal on a magnetic tape.
One difficulty encountered in typical
recording/reproducing devices is their general inability to
record, reproduce and subsequently process video signals by
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utilizing the various settings of the camera that generated those
video signals.
` OBJECTS OF THE INVENTION
Therefore, it is an object of the present invention to
provide apparatus and method for recording and reproducing a
video signal with camera setting data which overcome the
shortcomings of the above described devices.
Another object of the present invention is to provide
apparatus and method for recording and reproducing a video signal
with camera setting data which enables the recorded video signals
to be processed in accordance with.the stored camera setting data
so as to produce high quality video images.
A further object of the present invention is to provide
a recording and reproducing technique which allows for the
automatic or manual processing and/or correction of recorded
video signals-by utilizing the stored camera setting data.
STJMARY OF THE INVENTION
In accordance with one embodiment of the present
invention, apparatus and method operate to establish various
camera settings of an imag=ing device, e.g., a camera, in
preparation of imaging a video image, image the video image so as
to produce a video signal, generate camera setting data which
identifies the various camera settings that,were established for
imaging the video image, and record the video signal in a first
location of a track on a record medium, e.g., a magnetic tape,
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and the camera setting data in a second location of the track on
the record medium.
As one aspect of the present invention, date and time
data which represents a date and time at which the video image is
imaged is generated, and the date and time data is recorded along
with the video signal and camera setting data on the record
medium.
As another aspect of the present invention, the video
signal is recorded in a video data area of each track and the
camera setting data is recorded as data packs having a common
pack structure in a video auxiliary area of each track.
As yet a further aspect of the present invention, the
camera setting data identifies the iris setting, shutter speed,
white balance mode and focusing mode of the camera during imaging
of the video image.
As yet another aspect of the present invention, the
camera setting data identifies a vertical panning.speed, a
horizontal panning speed, manual control (hand deviation data),
and distance data of the camera during panning imaging of the
video image.
In accordance with another embodiment of the present
invention, apparatus and method operate to reproduce from a
record medium a video signal that represent:s a video image imaged
by a camera and camera setting data that identifies various
states of the camera during imaging of the video image, generate
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display data from the reproduced camera setting data, and output
the reproduced video sigrial and the generated display data.
As one aspect of this embodiment, the display data is
displayed to a user, and. the video signal is modified in
accordance with user instructions and the displayed display data.
BRIEF DESCRIPTION OF THE DRAWINGS-
The following detailed description, given by way of
example and not intended to limit the present invention solely
thereto; will best be appreciated in conjunction with the
accompanying drawings, wherein like reference numerals denote
like references and parts, in which:
Fig. 1 is a block diagram of apparatus for recording a
video signal with camera setting data in accordance with the
present invention;
Fig. 2 is another block diagram of apparatus for
recording a video signal with camera setting data which
illustrates a signal flow of the camera setting data during a
recording operation of the apparatus of the present invention;
Fig. 3 is a schematic illustration of a,camera display
in accordance with the present invention;
Fig. 4 illustrates the data structure of a track
recorded on a record medium in accordance with the present
invention;
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Figs. 5A and 5B schematically illustrate the data
structure of a pre-sync frlock and a post-sync block,
respectively;
Figs. 6A and 6B schematically illustrate the data
structure of the audio area of a track;
Figs. 7A and 7B schematically illustrate the data
structure of the video signal;
Fig. 8 shows the data structure of a video frame having
error correction data added thereto;
Figs. 9A to, 9C schematically illustrate the data
structure of the video area of a track;
Fig. 10 illustrates the data structure of the subcode
area of a track;
Figs. ilA and 11B show the data structure of the ID
data in the audio and video auxiliary areas;
Fig. 12 illustrates the data structure of the ID data
in the subcode area;
Fig. 13 shows the data structure of a pack of data;
Fig. 14 is a chart of the "large item" data as
identified in a data pack;
Figs. 15A to 15E illustrate the data structure of
various audio auxiliary data packs;
Fig. 16A illustrates an audio auxiliary closed caption
data pack, and Figs. 16B to 16E illustrate the data structure of
various video auxiliary data packs;
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. =
Figs. 17A and 17B illustrate the data structure of two
more video auxiliary data packs;
Fig. 18 identifies the audio auxiliary packs stored in
successive tracks on a record medium;
Fig. 19 illustrates the data structure of the video
auxiliary area of a track; {
Fig. 20 identifies the particular video auxiliary data
packs stored in successive tracks;
Fig. 21 schematically illustrates the data structure qf
a subcode area recorded in accordance with a 525/50 video system;
Fig. 22 schematically illustrates the data structure of
a subcode area recorded in accordance with a 625/50 video system;
Fig. 23 illustrates the data structure of a "consumer
camera 1" data pack;
Fig. 24 illustrates the data structure of a "consumer
camera 2" data pack;
Fig. 25 is useful for explaining the operation of a
television tuner;
Fig. 26 is a chart which identifies the type of signals
that are inserted into the various composite video signals;
Fig. 27 is useful for explaining the video and audio
auxiliary areas;
Fig 28 is a waveform diagram of a.,closed caption
signal;
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Fig. 29 is useful for explaining the insertion of a
closed caption data pack -in the video and audio auxiliary areas;
Fig. 30 is a chart which identifies the relationship
between the data of the closed caption data pack and the audio
mode data of the audio auxiliary source data pack;
Fig. 31 is useful for explaining the insertion of a
transparent (TR) data pack in the VAUX and AAUX areas;
Figs. 32A and 32B are useful for explaining the
apparatus of the present invention operating in the recording and
reproducing modes;
Fig. 33 illustrates the data structure of the video
auxiliary TR data pack;
Figs. 34A and 34B illustrate the data structure of VBID
data and WSS data stored in the video auxiliary TR pack;
Fig. 35 illustrates the data structure of the audio
auxiliary TR pack;
Fig. 36 schematically illustrates the data structure of
tracks having CC, VBID and WSS data therein;
Fig. 37 is a block diagram of the apparatus of the
present invention showing the flow of camera setting data during
a reproducing operation;
Fig. 38 schematically illustrates an on-screen display
during a reproducing operation of the apparatus of the present
invention;
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- ' 1
Fig. 39 schematically illustrates the display of the
various camera control settings; and
Figs. 40A to 40E schematically illustrate the various
displays of the camera control data in accordance with the
present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings, and particularly to Fig.
1 thereof, apparatus for recording and reproducing a video signal
with cantera setting data (hereinafter, either "video tape
recorder" or "camera") is shown as comprising a camera controller
1, a mode controller 2, a display controller 3, a signal
processing controller 4, a hand deviation controller 5, a display
6, a mechanism controller 7, a channel coder 8, a
recording/reproducing unit 9, as well as an I/O sync bus, a VSP
sync bus and a DRP sync bus. Although not shown, the apparatus
of the present invention further includes an imaging unit (i.e.,
a camera) which images a video image to produce a video signal.
The video tape recorder of Fig. 1, also identified herein as the
camera data control system, records camera setting data that is
generated in controller 1 on a record medium in the manner to be
discussed.
Camera controller 1, in response to control signals
from hand deviation controller 5, sets the various camera
settings, including the AE mode, the shutter speed, the white
balance, the iris/gain setting, etc., and transmits via the I/O
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sync bus, the camera settings to mode controller 2, such as shown
in Fig. 2. Hand deviation controller 5 receives user input
instructions to manually set the desired camera settings. Mode
controller 2 converts the camera setting information into camera
setting data (to be discussed) and supplies the camera setting
data via'the I/O sync bus to signal processi'ng controller 4 which
supplies the data via the VSP sync bus to mechanism controller 7
and then to channel coder 8 before being recorded on the record
medium (e.g., a magnetic tape). During a recording operation of
the video tape recorder of the present invention, display
controller 3 controls display 6 to display those camera settings
that are manually adjusted but to not display those settings
which have been automatically adjusted. Fig. 3 is a schematic
illustration of display 6 and which shows the manually adjusted
settings in either display area AR1 or display area AR2. For
example, if the camera is operating in a mode in which the iris
is manually set, the particular mode of operation in which the
iris is manually adjusted is indicated in the viewfinder (i.e.,
display 6) as well as the actual manually set value of the iris.
As another example, if the amount of'white balance is manually
adjusted, the manually adjusted value also is displayed in, for
example, display area AR2 of display 6. Further, if the shutter
speed.is manually adjusted, the shutter speed value is displayed
in area AR1 as well as on a separate LCD panel of the camera.
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Referring next to Fig. 4, the data structure of a track
recorded on a magnetic tape in accordance with the present
invention is shown. The track format is comprised of a margin,
followed by an ITI area, an audio area, a video area, a subcode
area, and another margin area. Inter-block gaps (IBG) are
provided between the ITI, audio, video and subcode areas. The
ITI area is comprised of a 1400 bit preamble, followed by an 1830
bit start-sync block (SSA) area, a 90 bit track information (TIA)
area and a 280 bit postamble area. The preamble of the ITI area
allows for PLL run-in during a playback operation, the postamble
establishes the end of the ITI area, and the SSA and TIA areas
each is comprised of 30 bit blocks of data in which a 10 bit pre-
set sync pattern (ITI-sync) is recorded at the beginning of each
block thereof. The 20 bits following the 10 bit preset sync
pattern of each block in the SSA area identify the number of the
respective sync block, and the 20 bits following the preset sync
pattern in the TIA area includes various recording format
information, including a 3 bit APT data, an SP/LP flag which
indicates the type of recording mode, and a PF flag which
indicates the reference frame of the server system during the
recording operation. The APT data defines the data structure of
the track and is generally "00011 in consumer type digital video
tape recorders. A relatively large number of sync blocks,, each
having a relatively small amount of code therein, are recorded at
predetermined fixed intervals on each track of the magnetic tape
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and, thus, post-recording of data in the sync blocks is easily
carried out.
The audio area of a track, as shown in Fig. 4, is
comprised of a 400 bit run-up area for PLL engagement purposes, a
100 pre-sync area which allows for the detection of an audio sync
block, and a post-amble area that includes therein a 50 bit post
sync which identifies the end of the audio area followed by a 500
bit guard area for protecting the audio data during a post-
recordihg operation. The pre-sync block and post-sync block, as
shown in Figs. 5A and 5B, respectively, each is comprised of 2
bytes of sync data, followed by 3 bytes of identification data
(IDO., ID1 and IDP). The 6th byte of the pre-sync block includes
an SP/LP flag, which is redundant to the flag stored in the ITI
area, and is utilized in the event the ITI area cannot be
reproduced. The 6th byte of the post-sync block is not used.
The audio data stored in the audio area of each track
is located between the pre-sync and post-sync blocks shown in
Fig. 4 and has a data structure as shown in Fig. 6A. The "data"
portion of the audio area is comprised of an audio auxiliary
(AAUX) area in which 5 byte packs of AAUX data are stored, and an
audio data area in which sound information are stored. The audio
area is comprised of 14 blocks in which the first 9 blocks
include AAUX data, audio data, and horizontal,parity C1, and the
succeeding 5 blocks each is comprised of vertical parity data C2
and horizontal parity data Cl. The 14 blocks each also include
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at the beginning thereof 2 bytes of sync data followed by 3 bytes
of identification data. 'Fig. 6B illustrates the data structure
of each of'the first 9 blocks shown in Fig. 6A.
Referring again to Fig. 4, the video area of a track
has a data structure that is similar to the audio area and, as
shown, is comprised of a run-up area, a pre=sync area, a video
data area, a post-sync area, and a guard area. A composite video
signal is separated into its respective Y. R-Y and B-Y
components, and converted to digital data. In a 525/60 video
system, 720 samples in the horizontal direction and 480 lines in
A , .
the vertical direction of the Y signal are extracted for each
frame, and 180 samples in the horizontal direction and 480 lines
in the vertical direction of the R-Y and B-Y signals are
extracted for each frame. The extracted data is divided into
blocks of data, such as shown in Figs. 7A and 7B. Fig. 7A
illustrates the Y(DY) signals in the block structure and Fig. 7B
illustrates the R-Y(DR) and B-Y(DB) signals in the block
structure, in which pairs of vertically adjacent blocks are
grouped together to form each block since the "right hand" side
blocks have only 4 horizontal samples each. The block structure
shown in Fig. 7A and 7B is comprised of 8100 blocks per frame and
a block that is comprised of 8 horizontal samples and 8 vertical
lines is identified herein as a DCT block.'
The blocks are shuffled and transformed in a manner
well known in the art, and the transformed blocks are quantized
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and variable length encoded in which the quantization step is
established in terms of 30 DCT blocks as a single unit so that
the total amount of resultant encoded data does not exceed a
predetermined value. The encoded data corresponding to 30 DCT
blocks is identified herein as a buffering unit. Fig. 8
illustrates the data structure of the video'area of a track in
which buffering units 0 to 26 each is comprised of 5 video
blocks, as shown in Fig. 9A. Each block in the buffering unit is
comprised of 1 byte of Q data, which corresponds to a
quantization parameter, followed by 76 bytes of video data.
Referring back to Fig. 8, the video area is comprised of a f irst
block a having VAUX data stored therein, a second block P having
VAUX data stored therein, 27 buffering units, a third block 7
having VAUX data stored therein, and 11 blocks of data having
vertical parity data C2 stored therein. Each VAUX block,
buffering unit, and block of C2 data, is preceded by 2 bytes of
sync data and 3 bytes of identification data, and is followed by
8 bytes of horizontal parity data Cl. Thus, each "video data"
block in the video area of a track is comprised of 90 bytes of
data, as shown in Fig. 9B, and each VAUX block (a, g and y) in
the video area of a track also is comprised of 90 bytes' of data,
as shown in Fig. 9C.
It is seen in the above discussed, framing format, that
since 27 buffering units are stored in each track on the magnetic
tape, and since each track includes therein 810 DCT blocks of
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video data and each frame corresponds approximately to 8100 DCT
blocks of video data, one video frame is recorded in 10 tracks on
the magnetic tape.
Referring next to Fig. 10 of the drawings, the data
structure of the subcode area of a track is shown. The subcode
area generally is provided for high speedsearching of the video
and/or audio data, and is comprised of a subcode preamble,
followed by 12 sync blocks and a postamble. Unlike the video and
audio areas of a track, the subcode area does not include a
presync and postsync area. Each subcode sync block, as shown in
expanded form in Fig. 10, is comprised of two sync bytes, three
identification bytes, a 5 byte auxiliary data area, and two bytes
of horizontal parity Cl.
Referring back to Figs. 9B and 9C, the sync blocks of
the audio, video and subcode areas are 24/25 modulated so that
the amount of data of each of the video, audio and subcode areas
have the amount of data shown in Figs. 9B and 9C. As is known,
24/25 modulation converts 24-bit based data to 25 bits so that
the pilot frequency components for tracking control are in
accordance with the recorded codes.
The ID data following the 2 sync bytes shown in Figs.
5A, 5E, 6B, 9B, 9C and 10 have a data structure as shown in Figs.
11A and 11B. As shown in both Figs. 11A and 11B, byte ID1 in all
of the above discussed areas, identifies the sync block number of
the block in which the identification data is located. The 4
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least significant bits of identification byte IDO identify the
track (i.e., track number) within each frame. Referring to Fig.
11A, which'illustrates the data structure of the identification
data in AAUX, audio and video sync blocks, the four most
significant bits of identification byte IDO identify a sequence
number which is utilized for variable speed 'reproduction. The
three most significant bits of identification byte IDO, shown in
Fig. 11B, identify the data structure of the area in which the
presync; postsync and C2 parity sync blocks are located. That
is, identification data located in the audio area of a track
identifies the data structure of the audio area (data APi), and
identification data in the video area of a track identifies the
data structure of the video area (data AP2). Data AP1 and AP2
generally have the value "000" for consumer type digital video
tape recorders.
Fig. 12 illustrates the data structure of the
identification data IDO and ID1 in all of the sync blocks in the
subcode area of a track. The most significant bit (FR) of byte
ID1 of each of the sync blocks identifies the particular field,
i.e., odd or even field, to which the current track corresponds.
In other words, flag FR indicates whether the track is one of the
first 5 tracks of a frame or is one of the second 5 tracks of the
frame. The next three most significant bits (AP3) of bitIDl in
sync block 0 and sync block 6 identify the data structure of the
subcode area, and the second through fourth most significant bits
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. . , in ID1 of sync block 11=(APT) identify the data structure of the
track. The three bits of-byte ID1 identified at "tag" in sync
blocks 1-5'and 7-10 are shown in expanded form in Fig. 12 and
include an index ID which is used for indexing purposes, a skip
ID which is used to skip various frames, for example,
commercials, and a PP ID which is used toidentify a frame as a
still image. The 4 least significant bits of byte ID1 and the 4
most significant bits of byte IDO are used to store the absolute
track number and this number is stored four times in the subcode
area of each track, as shown. The 4 least significant bits of
byte IDO of each sync block identifies the number of that- sync
block.
As previously discussed, the audio auxiliary (AAUX)
data is stored in the audio area of a track, the video auxiliary
(VAUX) data is stored in the video area of a track, and subcode
auxiliary (AUX) data is stored in the subcode area of each track.
These auxiliary data are stored in units of 5 bytes, called a 5
byte "pack" or simply a data pack, and have a data structure as
shown in Fig. 13. The first byte PCO of each data pack
identifies the type of data stored in the pack and is called the
"item" or "header" of the pack. Bytes PC1 to PC4 of each pack
are the pack data as defined by the item (byte PCO). The item
(PCO) is divided into the upper four bits, referred to as,the
"large item", and the lower four bits, referred to as the "small
item". The large item identifies the "Group" to which the pack
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data pertains and the small item identifies specifically what
information is contained'within the pack data (PC1-PC4) within
the specified Group.
Fig. 14 is a table showing the available Groups and, as
shown, the large item can specify the Groups of control (0000)
title (0001), chapter (0010), part (0011){, program (0100), audio
auxiliary data (AAUX) (0101), video auxiliary data (VAUX) (0110),
camera (0111), line (1000) and soft mode (1111). Large items
(1001) to (1110) are reserved for future use and large item
(1111) identifies a pack having no information.
Figs. 15A - 15E and 16A illustrate the data structure
of various audio auxiliary (AAUX) packs that are stored in the
AAUX audio area. The pack "AAUX source" is shown in Fig. 15A and
has an item value of 01010000 (PCO) and bytes PCi to PC4 contain
the information of locked mode flag (LF), audio frame size (AF
size), audio channel mode (CH), field system (50/60), signal type
(STYPE), emphasis flag (EF), time constant of emphasis (TC),
sampling frequency (SMP) and quantization data (QU). Flag LF
identifies whether or not the audio sampling frequency is locked
to the picture signals, data AF size identifies the number of
audio samples per frame, data CH identifies the number of audio
channels, and PA and audio mode identify the type of audio mode,
such as stereo or mono-audio.
Fig. 15B illustrates the data structure of the pack
AAUX source control", which has the item value (PCO) of
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1101010001". Bytes PC1 to PC4 of this pack identify the type of
copy protection of the audio signal, whether the video tape is an
original version, whether the original signal was an analog
source signal, copy generation data, cipher type data (CP), a
recording start frame flag (REC ST), a recording end frame flag
(REC END), recording mode data (REC MODE) which indicates the
type of recording (e.g. original recording, post recording,
insert recording, etc.), a direction flag (DRF), a play back
speed (SPEED), and a genre category.
Fig. 15C illustrates the data structure of the pack
"AAUX REC DATE", and which has the item value of "01010010".
Bytes PCl to PC4 of this pack include a daylight savings time
flag (DS), a thirty minute flag (TM) which indicates a time
difference of at least thirty minutes, data which indicates the
time difference, and data which indicates the day, week, month
and year on which the particular video signal was recorded.
Fig. 15D illustrates the data structure of the pack
"AAUX REC TIME", and which has the item value of "01010011".
Bytes PC1 to PC4 of this pack identify the particular time at
which the data was recorded. In the preferred embodiment, the
time recorded is based on the SMPTE format.
Fig. 15E illustrates the data structure of the pack
"AAUX REC TIME BINARY GROUP" and which has the item value.of
"01010100". Bytes PC1 and PC4 of this pack contain 8 binary
groups of SMPTE time code.
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Fig. 16A illustrates the data structure of the pack
"AAUX CLOSED CAPTION" and which has the item value of "01010101".
Bytes PC1 and PC2 identify the language of the primary "or main"
language and its type, as well as a secondary (or second) audio
language of the data included in the closed caption signals that
are transmitted during the vertical blanking interval of a
television signal. The three bits of the main and second audio
languages are defined as follows:
000 = unknown;
001 = English;
010 = Spanish;
011 = French;
100 = German;
101 = Italian;
110 = Other;
111 = none.
The type of the main audio language (main audio type)
is defined as follows:
000 = unknown;
001 = mono;
010 = simulated stereo;
011 = true stereo;
100 = stereo;
101 = data service;
110 = other;
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111 = none.
The second audio types are defined as follows:
000 = unknown;'
001 = mono;
010 = descriptive video service;
011 = non-program audio;
100 = special effects;
101 =-data service; -
110 = other;
111 = none.
When a closed caption pack is stored in the AAUX main
area (to be discussed), additional data relating to main audio
and second audio follow the above-discussed data. However, a "no
information" pack is recorded in place of a closed caption pack,
and data corresponding to the main speech and second speech
follow the information "audio mode" in the AAUX source pack.
Figs. 16B - 16E, 17A and 17B illustrate the data
structure of various VAUX packs that are stored in the video auxiliary area of
the video area of a track. Referring first to
Fig. 16B, the data structure of the pack "VAUX SOTJRCE is shown.
The item value of this pack is 0110000" (PCO) and bytes PC1 to
PC4 include data pertaining to the number of television channels
(tens of TV channel and units of TV channel), a black and white
(B/W) flag which identifies if the video signal is a
monochromatic signal, a color frames enable (EN) flag with a
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color frames identification code (CLF), source code data which
specifies the source of a video signal (e.g. camera, line, cable,
tuner, soft tape, etc.), the type of video system (50/60 and
STYPE), and tuner category data which identifies the type of
tuning system (e.g. broadcast/satellite broadcast, etc.).
Fig. 16C illustrates the data structure of the pack
"VAUX SOURCE CONTROL" and which has an item value of "01100001".
Bytes PC1 to PC4 of this pack include SCMS data, as well as other
data which specify the type of copy protection (if any) of the
video signal, whether the tape is original or a copy, the source
4
of the video signal (e.g., analog or digital), copy generation
data, cipher type data (CP), a recording start frame flag (REC
ST), a recording end frame flag (REC END), the type of recording
mode of the stored data (e.g. original recording, post recording,
insert recording, etc.), the aspect ratio (BC SYS and DISP), a
field flag (FF) indicating whether a field is to be outputted
twice, a flag (FS) which specifies whether a first field or a
second field is to be supplied during the period of the first
field, a flag (FC) which specifies whether or not the data of the
current frame is different from the data of a previous frame, a
flag (IL) which specifies the type of scanning (e.g. interlaced
or non-interlaced), a flag (ST) which specifies if the stored
image is a still picture, and data which specifies whether the
picture is recorded by a still camera, and the category of the
genre.
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j
Fig. 16D illustrates the data structure of the pack
"VAUX REC DATE" and which has the item value of "01100010".
Bytes PCi to PC4 of this pack identify the date on which the
video signal is recorded. Fig. 16E illustrates the data
structure of the pack "VAUX REC TIME", has the item value of
"01100011" and bytes PC1 to PC4 thereof identify the SMPTE time
of the frame in which the pack data is included. Fig. 17A
illustrates the data structure of the pack "VAUX REC TIME BINARY
GROUP",;which has the item value of "01100100", and bytes PC1 to
PC4 thereof include 8 binary groups of time code.
Fig. 17B illustrates the data structure of the pack
"VAUX CLOSED CAPTION". This pack has an item value of 01100101"
and bytes PCi to PC 4 identify the closed caption signals that
are transmitted during the vertical blanking period of the analog
video signal.
As described above, the audio, video and subcode areas
of the track store auxiliary data in the 5 byte pack structure.
In the preferred embodiment of the present invention, the
respective AAUX, VAUX and subcode AUX data each comprises a "main
area" and an "optional area" and are described below.
Referring next to Fig. 18, the AAUX pack structure of
the audio area of 10 successive tracks are shown in which each
track includes nine audio auxiliary packs (numbered 0-8) and in
which the audio area of each track has the data structure as
shown in Fig. 6A, previously discussed. Referring to Fig. 18,
t9+1.17\450100\3589.APP - 22 -
CA 02551272 1996-08-22
A
nine packs are recorded in each of ten tracks of a frame where
pack number-0 corresponds to the pack in the first audio sync
block and-pack number 8 corresponds to the pack in the ninth
audio sync block. Packs numbers 3-8 in odd numbered tracks
contain the numbers 50, 51 ... 55, respectively, and pack numbers
0 - 5 in even numbered tracks also contain the numbers 50, 51 ...
55, respectively. In this area, i.e., those packs which contain
a number, comprises the AA.UX main area, while the other area,
i.e., trhose packs that do not contain a number, comprises the
AAUX optional area. The packs in the main AAUX area, as
identified in Fig. 18, identify the value of the item (by PCO),
in hexadecimal notation, of the AAUX packs. For example, the
AAUX source pack is stored as pack number 3 in tracks 1, 3, 5, 7,
9 and as pack number 0 in tracks 2, 4, 6, 8 and 10.
As previously discussed with reference to Fig. 8, sync
block a, (3 and y each includes a 77 byte VAUX data area. Fig. 19
illustrates the data structure of sync blocks a, (3 and y in which
each of these blocks includes 15 five byte packs, followed by two
unused bytes. As shown, a sync block a includes pack numbers 0-
14, sync block (3 includes pack numbers 15-20, and sync block y
includes pack numbers 30-44, for a total of 45 packs that are
stored in the video area of a track.
Fig. 20 illustrates the pack structure of the VAUX area
of the video area of 10 tracks (1 frame) and, as shown, pack
numbers 39-45 in odd numbered tracks and pack numbers 0-5 in even
NRd.17\450100\3589.APP - 23 -
CA 02551272 1996-08-22
numbered tracks comprise the VAUX main area. The other packs,
i.e., those that do not contain a number, comprise the VAUX
optional a'rea. The packs in the VAUX main area containing
numbers 60-65 correspond to the packs "VAUX SOURCE", "VAUX SOURCE
CONTROL", "VAUX REC DATE", "VAUX REC TIME", "VAUX REC TIMES
BINARY GROUP", and "VAUX CLOSED CAPTION", respectively, shown in
Figs. 16B - 16E, 17A and 17B.
As previously discussed with reference to Fig. 10, the
subcode:area of each track includes 12 sync blocks in which each
sync block includes therein five bytes of auxiliary (AUX) data.
A five byte pack is stored as the five bytes of auxiliary data in
each sync block and, thus, the subcode area of each track
includes 12 sync packs. Referring next to Fig. 21, the block
structure of the subcode area of 10 tracks in a 525/50 system in
which each frame is comprised of 10 tracks is shown. In Fig. 21,
sync blocks 3-5 and 9-11 are shaded and represent the main area
of the subcode area, and the remaining sync blocks 0-2 and 6-8
represent the optional area. The upper case letters in the main
area of this subcode area represent subcode auxiliary packs, such
as those previously discussed, and the lower case letters in the
optional area of the subcode area represent optional subcode
auxiliary packs which may be stored in the optional subcode area.
Fig. 22 is similar to Fig. 21 but illustrates the pack structure
of the subcode area of 12 tracks of a 525/60 system in which each
frame is comprised of 12 tracks on a magnetic tape.
MM.17\150100\3589.APP - 24 -
CA 02551272 1996-08-22
Referring back to Fig. 14, a pack having a large item
value of "0111" indicates that the pack pertains to the Group
"CAMERA". 'Several packs in the Group CAMERA include "CONSUMER
CAMERA 1", "CONSUMER CAMERA 2", "LENS", "GAIN", "PEDESTAL",
"GAMMA", "DETAIL", "CAMERA PRESET", "FLARE", "SHADING", "KNEE",
= and "SHADOW". Fig. 23 illustrates the data'structure of the pack
"CONSUMER CAMERA 1". Bytes PCi to PC4 of this pack include data
pertaining to the iris information (IRIS)-, AE mode information,
automatic gain mode information (AGC), white balance mode
information (WB MODE), white balance information (WHITE BALANCE),
focussing mode information (FCM) and focal point position
information (FOCUS).
The iris information (IRIS) in the data pack "CONSUMER
CAMERA 111, wherein the iris position = 21Pl8, is defined as
follows:
0 to 3 Ch = IP;
3Dh = not more than F1.0;
3Eh = close; and
3Fh = no information.
The AE mode information (AE MODE) is defined as
follows:
0 = full automatic;
1 = gain priority mode;
2 = shutter priority mode;
3 = iris priority mode;
t49.17\450100\3589.APP - 25
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CA 02551272 1996-08-22
4 = manual;
Fh = no information; and
Other values = reserved.
The automatic gain control information (AGC) is defined
as follows:
0 to Dh = G; and {
Fh = no information,
where the value of G = -3 + Gx3 dB.
The white balance mode data (WB MODE) is defined as
follows:
0 = automatic;
1 = hold;
2 = one push;
3 = pre-set;
7 = no information; and
other values = reserved.
The white balance data (WHITE BALANCE) is defined as
follows:
0 = candle;
1 = incandescent lamp;
2 = low color temperature florescent lamp;
3 = high color temperature florescent lamp;
4 = sunlight;
5 = cloudy weather;
Fh = no information; and
M2+I.17\450100\3569.APP - 26 -
CA 02551272 1996-08-22
other values = reserved.
The focusing mode information (FCM) is defined as
follows:
0 = automatic focusing; and
1 = manual focusing.
The focal point information (FO'CUS) is defined as
follows:
0 to 7Eh = focal point position; and
7Eh = no information,
where the focal point position = Mx10' cm and M represents the
upper order five bits of FOdtJS and L represents the lower order
two bits of FOCUS.
Fig. 24 illustrates the data structure of the pack
"CONSUMER CAMERA 2". Bytes PC1 to PC4 include panning data
pertaining to panning information in the vertical direction
(VPD), panning speed in the vertical direction (V PANNING SPEED),
hand'deviation information (IS) and vertical distance information
(FOCAL LENGTH).
Panning in the vertical direction (VPD) is defined as
follows:
0 same direction as the vertical scanning direction;
and
1 opposite direction to the vertical scanning
direction.
h2d.17\450100\3589.APP' - 27 -
CA 02551272 1996-08-22
The panning speed in the vertical direction is defined
as follows: =
0 to lDh = panning speed;
lEh = not less that 29 lines per field; and
lFh = no information.
Panning in the horizontal direction (HPD) is defined as
follows:
0= same direction as the horizontal scanning
direction; and
1 = opposite direction to the horizontal scanning
direction. `
Panning speed in the horizontal direction (H PANNING
SPEED) is defined as follows:
0 to lDh = PS;
3Eh = not less than 122 pixels per field; and
3Fh = no information,
wherein the panning speed = 2xPS and one pixel period =
2/(13.5X106) second.
Hand deviation correction is defined as follows:
0 = on; and
1 = off.
Focal length is defined as follows:
[0096]
0 - FEh = focal length;
3Dh = not more than F1.0; and
-
bIDf.17\450100\3589.APY - 28
CA 02551272 1996-08-22
FFh = no information,
where the focal length ='Mx10L cm and M represents the upper 7
bits of FOCAL LENGTH and L represents the LSB of FOCAL LENGTH.
The main areas in each of the above discussed video,
audio and subcode areas of a track have stored therein auxiliary
data which generally is common to all types'of magnetic tapes.
On the other hand, different optional auxiliary data may be
stored in the optional areas, discussed above, by both tape
manufacturers and/or users of consumer video tape recorders.
Optional auxiliary data that is stored in the optional areas of a
track may include character data, teletext signal data, ,
television signal data, or any other data that is included in the
vertical blanking interval of a television signal, as well as
computer graphics data.
Fig. 25 represents a television tuner in which a
composite video signal having additional information in the
vertical blanking intervals therein is received by a tuner 100.
Tuner 100 separates the video, audio and audio pilot signals from
the supplied signal. The composite video signal is comprised of
picture data, two dimensional/one dimensional converting data
(e.g., horizontal sync, video sync and vertical blanking
signals), as well as system data. The system data includes
closed caption (CC), ED, WSS and VBID data.' The system data
includes data pertaining to the video picture, as well as speech
information.
bA4.17\450100\3589.APP - 29 -
CA 02551272 1996-08-22
In the digital video tape recorder, two dimensional/one
dimensional conversion data, which includes therein system data,
is removed from the video signal prior to being recorded on a
magnetic tape. If the input signal is directly recorded and
directly output when reproduced, a type of recording known as
"transparent recording" is accomplished. However, transparent
recording generally is not accomplished in digital video tape
recorders_
Fig. 26 illustrates the various system data that is
included in various types of video signals. It is seen that some
of the information (e.g., character multiplexed signal and
teletext data) cannot simply be recorded, without further
processing thereof, in a digital format. Further, macrovision
signals correspond to "copy guard" and, thus, cannot simply be
recorded as is.
Referring next to Fig. 27, the particular types of data
stored in the video auxiliary (VAUX) and audio auxiliary (AAUX)
areas of a track are shown. As previously discussed, the VAUX
area includes data packs having the item value (or header) of 60h
to 65h, and the AAUX area of a track includes therein data packs
having item values of 50h to 55h. The video and audio data packs
"source" and "source control" having the header values of 60h,
61h, 50h and 51h, respectively, are known as "!indispensable"
data, whereas the video and audio data packs having headers of
62h-65h and 52h-55h optionally are stored in each of the tracks
hAt.17\450100\3569.APP - 30 -
CA 02551272 1996-08-22
on the magnetic tape and=no information packs having the item
value of FFh may be stored in place of these data packs.
Furthermore, the above-mentioned CC, EDS, VBID and/or WSS data
may be transparently recorded using the closed caption packs
having the header values of 65h and 55h as well as the
transparent packs having the header values of 56h and 66h.
Fig. 28 is a signal waveform diagram of a closed
caption signal which is comprised of 6.5'cycles of a clock run-in
signal followed by three start bits S1, S2 and S3, a first
character data and a second character data. In accordance with
the present invention, the first and second character data in the
closed caption signal is stored in a VAUX closed caption pack
which has the data structure shown in Fig. 17B, previously
discussed. It is noted that closed caption signals generally are
inserted in both the first and second fields of a video signal,
but EDS signals may also sometimes be included in the second
field of the video signal. That is, "raw" closed caption signals
and raw EDS data may be stored in a single VAUX closed caption
pack.
VAUX closed caption packs have the item value of 65h
and are stored in the video auxiliary area of each track, as
shown in Fig. 20. If the closed caption data is not included in
the video signal, no information packs instead-are stored at
these locations. Referring back to Fig. 17B, the VAUX closed
caption pack specifies that the data is to be inserted into the
t9+1.17\450100\3589.APP - 31 -
CA 02551272 1996-08-22
twenty-first line of a field and, thus, it is not necessary to
specify this line in a"].ine" pack. When a digital video signal
having closed caption data packs are reproduced from a record
medium, the closed caption data automatically is inserted into
the twenty-first line of a television signal by an appropriate
decoder.
Referring next to Fig. 29, the closed caption data
stored in the closed caption data packs having headers of 65h and
55h are deemed to be indispensable when closed caption signals
are included in the television signals. One technique to
determine whether a closed caption signal is included in a
television signal is by detecting line 21 as a 32fH clock run-in
signal 10.5 microseconds after the decay of the horizontal
synchronization signal. If it does, the ensuing 16-bit data is
extracted therefrom and the 16 bits of data, which is comprised
of two 7-bit ascii codes, along with two parity bits, are stored
as the upper and lower bites of the respective field in the VAUX
closed caption data pack. -It is contemplated that U.S.
originated video signals recorded in digital format on a record
medium are reproduced in Japan which generally does not process
the closed caption signals. The VBID data, which includes aspect
ratio information, is included in the closed caption data in the
television signal and, thus, "indispensable" data in the closed
caption signal is extracted therefrom and included in the
indispensable data packs having the headers of 60h, 61h, 50h and
-
MA1.17\450100\3589.APP - 32
CA 02551272 1996-08-22
51h. Thus, aspect ratio data is included in a pack having a
header of 61h so that televisions that do not process the closed
caption data properly switch to the proper aspect ratio as
identified by the VBID data.
Closed caption signals may include both indispensable
and dispensable data and such data is stored in the VAUX closed
caption pack, The indispensable data is stored in data packs
having headers of 60h, 61h, 50h and 51h-and thus are fully
reprodutible by televisions that are operable to decode the VAUX
closed caption packs. In addition, televisions that are unable
to decode the VAi7X closed caption packs still can restore the
closed caption signals to the twenty-first line of the television
signal if it at least recognizes the existence of the VAUX closed
caption data pack. Further, televisions that are unable to
-decode and are unable to recognize the existence of VAUX closed
caption packs are still able to restore the vertical blanking
information by utilizing the data from the packs having the
headers of 60h, 61h, 50h and 51h and, thus, various types of
televisions and/or video tape recorders are operable to utilize
the closed caption data. The data structure of the audio
auxiliary closed caption data pack has been previously discussed
with reference to Fig. 16A. This data pack, which has a pack
header of 55h, is stored at those locations in the audio
auXiliary area of a track as shown in Fig. 18. Similar to the
VAUX closed caption pack, data that is indispensable for
-
M2.S.17\450100\3589.APP - 33
CA 02551272 1996-08-22
reproducing speech signals is stored in the data packs having the
headers of 50h and 51h. Thus, a television or video tape
recorder that is unable to process the AAUX closed caption pack
is still operable to process the indispensable data that is
included in the packs having the headers of 50h and 51h.
Data concerning the audio is stored in the VAUX closed
caption pack. However, this information also is stored in the
audio area of a track so that the audio data (i.e., speech data)
can be reproduced even if the VAUX closed caption packs cannot be
reproduced. Thus, post-recording of video data in the video area
of a track, which would result in the loss of the VAUX closed
caption packs, does not cause the audio stored in the audio area
of a track to be un-reproducible.
EDS data includes information regarding the particular
language of the closed caption data as well as the language
(i.e., words) themselves, as previously discussed with respect to
Fig. 16A. Fig. 30 illustrates the relationship between the data
stored in the AAUX closed caption pack and the audio mode data
stored in the AAUX source pack. As shown, the various types of
audio data as well as the locations of the information are
reflected in the stored data.
The VBID, WSS and vertical blanking data are stored in
the VAUX and AAUX transparent packs, and which have the data
structure as shown in Figs. 33 and 35, respectively (to be
discussed). The VAUX transparent pack, which has the pack header
PM1.17\450100\3589.APP - 34
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CA 02551272 1996-08-22
of 66h, and the AAUX transparent pack, which has the pack header
of 56h, are stored in the positions as shown in Fig. 31. These
packs are stored at the same location as the closed caption
packs, and depending on whether a video tape recorder is adapted
to process a transparent pack, either only closed caption packs
or. both closed caption packs and transparent packs are stored in
the digital data in the manner shown in Fig. 32A. Fig. 32B
identifies the process of a video tape recorder that is adapted
to process a transparent pack as well as a video tape recorder
that is not adapted to process.a transparent pack. Referring
next to Fig. 33, the data structure of a VAUX transparent pack is
shown. This data pack includes four DATA TYPE bits which
identify the type of data stored in the transparent pack. The
data type may specify the data as VBID data, WSS data, EDTV2
data, as well as to future types of data (e.g., X field 1, X
field 2) in which different types of data are stored in the
different fields of each frame. A maximum of twenty-eight bits
are stored in the VAUX transparent pack and, as shown in Fig. 26,
such is possible with clock rates that are less than 1 MHz. Fig.
34A illustrates a transparent pack having VBID data stored
therein and Fig. 34B illustrates a transparent pack having WSS
data stored therein.
Fig. 35 illustrates the data structure of an AAUX
transparent pack which, as shown, has a data structure similar to
the data structure of the VAUX transparent pack. In addition,
IYCM.17\450100\3589.APP - 35 -
CA 02551272 1996-08-22
since VBID, WSS and EDTV2 data do not include audio data, the
data types of 0000, 0001 and 0010 are not assigned. In this
case, "no information" packs may be utilized. Further, it is
preferable to keep the assignment of the data types of the VAUX
transparent pack and, the AAUX transparent pack the same so as to
prevent processing of such information from becoming complex.
Referring back to Figs. 18 and 20, the structure of the
audio and video auxiliary areas in each of ten tracks are shown.
It is sden that each track includes the same pack contents, and
if the closed caption pack is written in at least the last pair
of tracks (e.g., tracks 9 and 10), a transparent pack "picks" the
closed caption pack even in the event that a magnetic tape which
includes only the necessary closed caption packs in each of the
.ten tracks.
Fig. 36 illustrates the data structure of ten
successive tracks which include therein VBID, WSS and closed
caption data. Video tape recorders that are operable only to
process the closed caption and VBID data, for example, then only
the closed caption and VBID data is reproduced and processed
which provides this data at predetermined positions in the
vertical blanking interval of a video signal. WSS data, however,
may be reproduced from the data packs having the pack headers of
60h and 61h and thus will be superimposed at p-redetermined
positions in the vertical blanking period of the video signal.
The data structure of the audio auxiliary area, regarding the
IMI.17\450100\3589.APP - 36
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CA 02551272 1996-08-22
audio auxiliary transparent pack and closed caption pack, is
similar to the video auxiliary area and, thus, description
thereof is=omitted herein.
As previously discussed with reference to Figs. 1 and
2, the camera/video=tape recorder of the present invention
generates camera setting data which represerit the various
settings of the camera during imaging of a video image and stores
the video signal along with the camera setting data on a magnetic
tape. The camera setting data, in accordance with the present
invbntion, are the data packs "consumer camera 1", "consumer
camera 2", "lens", "gain", "pedestal", "gamma", "detail", "camera
preset", "flare", "shading","knee", and/or "shutter". The data
structure of the consumer camera 1 and consumer camera.2 packs
have been previously discussed and are shown in Figs. 23 and 24,
respectively. In addition, date and time data regarding the date
and time at which the video signal was produced (i.e., when the
picture was taken) is stored in the REC date and REC time packs,
or the binary group pack. These data packs are stored in the
auxiliary data areas of a track, previously discussed. Fig. 37
is a block diagram of apparatus for recording and reproducing a
video signal with camera setting data in accordance with the
present invention in which the flow of reproduced camera setting
data from the recording/reproducing unit 9 to_the display. 6 is
shown. During a reproduction operation, recording/reproducing
unit 9 reproduces the video signal and camera setting data from a
MM.17\450100\3589.APP ~ 37
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CA 02551272 1996-08-22
magnetic tape and supplies the reproduced camera setting data via
the various circuits to mode controller 2 which converts the
supplied camera'setting data into "display" data and which
supplies the display data to display controller 3. Mode
controller 2 is responsive to user commands to determine whether
the display data is to be output in either a first output
configuration or a second output configuration. Display
controller 3 supplies appropriate control' signals to display 6 so
that display 6 displays the various camera setting data and/or
time and date data on a predetermined specified display area ARO
shown in Fig. 38, or on a separate LCD display on the camera
body. Fig. 39 illustrates the structure of area ARO and, as
shown, the particular AE mode is shown, and information regarding
the shutter speed, the white balance gain, the iris setting and
the gain information are shown. Figs. 40A to 40E illustrate
different displays of the camera of the present invention
corresponding to whether there is any hand deviation (i.e., user
control), the particular AE mode, the shutter speed, the iris
setting, the white balance (WB) setting and the iris/gain
settings, as shown in Figs. 40A, 40B, 40C, 40D and 40E,
respectively.
By using the data shown in the apparatus' display, or
in a reproducing apparatus which reproduces the video signal and
camera setting data, the video signal can be processed
accordingly, that is, the video signal can be processed and/or
h24.17\450100\3589.APP - 38
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CA 02551272 1996-08-22
developed automatically or manually by a user in accordance with
the various camera setting data that is displayed therewith.
While the present invention has been particularly
described in conjunction with preferred embodiments thereof, it
will be readily appreciated by those of ordinary skill in the art
that various changes may be made without departing from the
spirit and scope of the invention. For example, although the
present invention has been shown and descr-ibed as recording and
reproducing camera setting data including hand deviation
correction data, AE mode data, shutter speed, iris setting, WB
data and gain data, the present invention is not limited solely
to these types of camera settings and may record and reproduce
other types of camera settings, even those that are not currently
in use.
As another example, although the present discussion is
directed to a particular type of recording format, the present
invention is not limited to this format and may be widely applied
to other recording formats as well as to other types of recording
mediums, including, but not limited to, magnetic tapes, magneto-
optical disks, optical disks, computer random access memories,
etc.
Therefore, it is intended that the appended claims be
interpreted as including the embodiments described herein., the
alternative mentioned above, and all equivalents thereto.
_
hTl.17\450100\3589.A2P - 39
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