Note: Descriptions are shown in the official language in which they were submitted.
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CA 02557859 2001-10-05
METHOD AND APPARATUS FOR DETERMINING DIGITAL A/V CONTENT
DISTRIBUTION TERMS BASED ON DETECTED PIRACY LEVELS
This is a division of co-pending Canadian Patent
Application No. 2,425,115 filed on October 5, 2001.
FIELD OF THE INVENTION
The present invention generally relates to the
distribution of copyrighted material and in particular, to a
method and apparatus for determining digital audio-visual
("A/V") content distribution terms based on detected piracy
l0 levels.
BACKGROUND OF THE INVENTION
The unauthorized copying and distribution (also
referred to herein as "piracy") of audio-visual content such
as motion pictures, music, the spoken word, photos or printed
text has and continues to be a major problem for owners of
such content. For example, the Recording Industry Association
of America ("RIAA") has asserted that physical goods piracy
costs the United States recording industry alone hundreds of
millions of dollars a year, and around the world, many
billions of dollars annually.
With the advent of the Internet and the growing
popularity of digital A/V content, the problem of piracy has
grown to new dimensions. The availability of these and other
new technologies have made the problem of unauthorized copying
so pervasive that virtually anyone owning a personal computer
or Internet appliance can be a participant in copyright
infringement. Under such circumstances, the rights of
copyright owners are increasingly being violated and their
rightful profits lost.
Audio Distribution
Music type A/V content, for example, is easily
generated today from audio compact disc ("CD") using
"ripper" software. As shown in FIG. 1, to generate A/V
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content 1 04, original audio on a CD 101 is played on an
optical drive 102 and CD °ripper" software 103 creates the
digital A/V content 104 from the output of the optical drive
102. Preferably, the A/V content 104 is in the form of a
computer tile in the MP3 format. A/V content 104 created in
this way is a quite accurate representation of the original
audio. Once created, it is an easy matter to transfer the
A/V content 104 over the Internet 111 to other parties
without the receiving parties paying for the sights to the
audio. For example, the growth of online music communities,
such as can be found at www.napster.com, or formed as a
Gnutella community through software made available at
www.griutella.wego.com, facilitate a viral-type spread of
audio content as music consumers browse and transfer content
freely and easily between themselves without compensation to
the content owners.
FIG 1 illustrates an example of a Napster virtual
network 100. A list server computer 105 has a memory 106
storing list data 107 that includes the.identities of
ZO consumer client computers.currently on-line, the music or
other A/V content available from each consumer client
computer, and the.Internet coi~nectioy speed associated with
each consumer client computer. In this example, consumer
client computers 108, 109 and 110 are currently on-line,
having contacted and made a connection with the list server
computer 105 over the Internet 111. Consumer client
computers 108, 109 and 110 interact with the list server
computer 105 in a classic client-server relationship to
access the list data 107 over the Internet 111. This allows
operators of consumer client computers 108, 109 and 110 to
then select which music and from which other consumer client
computer to transfer music from. For example, as depicted
by dotted lines in FTG. 1, if the operator of consumer
client computer 109 has selected A/V content 104 to download
from consumer client computer 108, then consumer client
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computer 109 interacts with consumer client computer 108 in
a client - server type manner to transfer a copy of the A/V
content 1 04 to its memory 113.
In the case of Napster-type sites such as depicted
in FIG. 1, the list server 105 doesn't actually store music,
nor does the music ever actually transit through the list
server 1 O 5 or its memory 106. The list server 105 does
maintain the centralized data list 107, however, and
consequently, the person or entity that generates the
l0 centralized data list 107 on the list server 105 may be
subject to legal liab~,lity. To avoid the visibility that
the centralized data list serving entity.provides, other
methods for transferring music between cooperating parties
have been devised. One such method is the Gnutella
community approach.
FTG. 2. illustrates an example of a Gnutella ,-
virtual network f00. In this case, there is no list server.
Each of the consumer computers 201, 202, 203 and 204 may act
as either a client or a server, depending upon tn~hether it is
receiving music from or transferring music to another
consumer computer. When running the Gnutella application
software, each of the consumer computers 201, 202, 203 and
204 maintains a list of ether consumer computers that it
knows the IP address of in the Gnutella virtual network 200.
A special feature of the Gnutella application software is
that each of the consumer computers 201, 202, 203 and 204
need only know the IP address of one other consumer computer
in the Gnutella virtual network 200 to provide access to all
consumer computers 201, 202, 203 and 204 in the Gnutella
virtual network 200. Each of the consumer computers 201,
202, 203 and 204 is then able to submit search queries to
the Gnutella virtual network 200 and receive search results.
Thus, when an operator of one of the consumer computers 201,
202, 203 and 204~finds a piece of music that he or 'she
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desires t o obtain, they can indicate this to the Gnutella
applicat i on software, and the Gnutella application software
facilitates a direct~transfer from a consumer computer
including such music to the requesting consumer computer
through the Internet 205. As an example, the solid lines
between the consumer~computers 201, 202, 203 and 204 and the
Internet 205 are representative of the transfer of search
queries and search results between the consumer computers
201, 202, 203 .and 204. The dotted lines, on the other hand,
are representative of an actual transfer of a copy of music
214 from the consumer computer 203 to the consumex computer
204 through the Internet 205 after the operator of consumer
computer 204 has made a selection of that music.
FzG. 3 illustrates an example of a coupling
diagram for the Gnutella virtual network 200 where Alice,
Charlie, Eve and Bob are pseudonyms for consumer computers
201, 202, 203 and 204 respectively. In the example, Alice
knows that Charlie is coupled to the Gnutella virtual
network 200 (i.e., Charlie is on-line) since she knows his
IP.address, but does not know that Eve and Bob are coupled
to the Gnutella virtual network 200; Charlie knows that
Alice and Eve are coupled to the Gnutella virtual network
200 (i.e., Alice and Eve.are on-line) since he has their IP
addresses. but does not know that Bob is coupled to the
Gnutella virtual network 200; Eve knows that Bob and Charlie
are coupled to the Gnutella virtual network 200 (i.e., Bob
and Charlie are on-line) since she knows their IP addresses,
but does not know that Alice is .coupled to the Gnutella
virtual network 200; and Bob knows that Eve is coupled to
the Gnutella virtual network 200 (i.e., Eve is on-line)
since he knows her IP address, but does not know that Alice
and Charlie are coupled to the Gnutella virtual network 200.
As can be appreciated, since Alice, Charlie, Eve and Bob do
not know the identities of all other consumer computers
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coupled to the Gnutella virtual network 200, the Gnutella
application software provides protective anonymity to the
unknown consumer computers shielding them from detection and
possibl a prosecution for copyright infringement.
There have been initiatives to create secure
environments for the download, distribution and listening of
digital music from the Internet from groups such as the
Secure D~-gital Music Initiative (SDMI). This system uses
encrypti on to control access to music content and watermarks
or embedded data to control equipment (either to control
recording or control playback) once the content has been
'decrypted. This system has the disadvantage that it
requires introduction of a completely new class of.portable
music player devices before it is effective. If these
devices prove to be unacceptable in the marketplace, then
the SDMI system is ineffective and does nothing to encourage
consumers to purchase legal copies of digital A/V content
versus continuing to rip and transfer music derived from
CD's.
Theatrical Presentation:
Movie content owners obtain a significant portion
of their return on investment in the production of a movie
during the theatrical release. The theatrical release
precedes the release to other channels such as in-flight
entertainment, Cable TV pay-per-view channels or videotape
in order to maximize the return on the investment. Content
distributed illegally during the theatrical release
represents a reduction in the content owner's early rate of
return. With current film-based theatrical presentation,
the use by pirates of a camcorder in a theater provides the
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primary mechanism fo.r obtaining movie content during the
theatrical release window.
The introduction of digital content into theater
operations allows for the use of automation systems in
theaters. A theater automation system allows a theater
owner to operate his facility with a smaller staff size, to
more rapidly ramp up and ramp down the number of screens
available for any particular piece of content, and to
provide for an overall improvement in the efficiencies of
his operations. These theater automation systems also allow
the theater operator to rapidly communicate box office
information to the distributor thus allowing the distributor
and eventually the copyright holder to operate more
efficiently.
FIG. 4 illustrates an example of a digital theater
system 400 that allows for the distribution of movies in a
high quality digital form. A distribution server 40~. '
distributes the movies to a theater client 402 through a
secure transmission path 403 using satellite or fiber optic,
or alternatively, by optical or magnetic media (not shown).
The projection of the movie content in a digital theater is
likely to provide a superior picture quality compared to
film thus making the movie displayed in this venue more
desirable as the source for a movie pirate's operation. The
distribution server 401 transmits encrypted content through
the transmission path 403 (or alternatively, the media) to
enhance the content's security, and the theater client 402
has a decrypter 404 for decrypting the movie before sending
it to a projector 405 for display on a theater screen 406.
Despite such protection, however, there are various points
where the movie content is available in an insecure form.
For example, a pirate camcorder 407 might record the movie
playing on the theater screen 406 so that the recorded movie
may be distributed through pirate distribution channels 408.
As another example, other points of vulnerability to
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pirating may be the interface between a playback device (not
shown) and the projector 405 or some point within the
projector 405.
Generally, a theater operator is under some
obligation to the content owner to attempt to limit his
customer's attempts to illegally make copies with a camcorder
within his theater. Obviously, he is also obligated to ensure
that his employees who have access to movie content adhere to
the law. As such, a copyright owner can legitimately argue
that a theater which is a source of pirated movies should be
obliged to compensate the copyright owner appropriately if
that theater is a source of pirated content.
Post-Production:
The current process for producing a movie entails
the distribution of tasks among a large number of employees
and contractors. As depicted in FIG. 5, with the rapid
increase in the capability of computers and networks, such a
process often involves the distribution of pieces of a movie
or other A/V content from a central publisher computer 501 out
to contractor computers 502, 503 and 504 to provide for a
distributed work environment 500. This distributed work
environment improves the efficiency of the production process
but also makes a greater portion of the A/V content 506
vulnerable to copying or inappropriate re-distribution through
pirate distribution channels 513. Piracy from the
post-production work environment can sometimes even result in
pirated movies hitting the street prior to theatrical release.
Again, this negatively impacts the content owner's revenue
stream.
CA 02557859 2001-10-05
OBJECTS AND SUI~IARY OF THE INVENTION
Accordingly, it is an object of the present
invention to provide a method and apparatus for distributing
A/V content and other protected material that compensates in
some fashion rights holders of such material against losses
incurred by unauthorized copying of the protected material.
Another object is to provide a method and apparatus
for generating a database of unauthorized copying of protected
material for use in a method or apparatus for distributing A/V
content and other protected material.
In accordance with one aspect of the present
invention there is provided a computer implemented method
for generating a database of unauthorized copying of protected
material, comprising: detecting at least one identification
embedded in a copy of protected material procured from a
distribution channels and storing information of said
protected material according to said at least one
identification in a database so as to be indicative of
unauthorized copying of said protected material.
2o In accordance with another aspect of the
present invention there is provided an apparatus for
generating a database of unauthorized copying of protected
material, comprising a computer having a memory with
computer-readable code embodied therein, for execution by a
CPU said code comprising: code means for detecting at least
one identification embedded in a copy of protected material
procured from a distribution channel; and code means for
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storing information of said protected material according to
said at least one identification in a database so as to be
indicative of unauthorized copying of said protected material.
Additional objects, features and advantages of the
various aspects of the present invention will become apparent
from the following description of its preferred embodiments,
which description should be taken in conjunction with the
accompanying drawings.
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BRTEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates, as an, example, a block diagram
of a Naps ter virtual network.
FIG. 2 illustrates, as an example, a block diagram
of a Gnutella virtual network.
FIG. 3 illustrates, as an example, a network
diagram of a Gnutella virtual network.
FIG. 4 illustrates, as an example, a block diagram
of a digital theater system.
FIG. 5 illustrates, as an example, a block diagram
of a distributed work environment.
FIG. 6 illustrates, as an example, a block diagram
of a distribution. server system for directly distributing
A/V content, utilizing aspects of the present invention.
FIG. 7 illustrates, as an example, a block diagram
of a distribution server system for indirectly distributing
A/V content, utilizing aspects of the present invention.
FIG. 8 illustrates, as an example, a flow diagram
of a method of distributing protected material, utilizing
aspects of the present invention.
FIG. 9 illustrates, as an example, a block diagram
a detection server system for generating a database of
unauthorized copying of A/V contend, utilizing aspects of
the present invention. .
FIG. 10 illustrates, as an example, a flow diagram
of a method of generating a database of unauthorized copying
- of protected material, utilizing aspects of the present -
invention.
FIG. 11 illustrates, as an example, a system for
distributing A/V content to digital theaters and detecting
unauthorized copying of such A/V content, utilizing aspects
of the present invention.
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FIG. 12 illustrates, as an example,.a system for
distributing A/V content to contractors and detecting
unauthorized copying of such A/V content, utilizing aspects
of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
As used herein: the terms "material" and "content"
may be used interchangeably; "audio-visual content" or "A/V
content" includes motion pictures, music; the spoken word,
photos or printed text; "protected material" means material
protected by contract or intellectual property law, and
includes A/V content; "recipient" means a party or a
computer that has received protected material; "prospective
recipient" means a party or a computer that has requested
protected material; and "computer" includes a workstation, a
personal computer, an information appliance, a set top-box,
and any other connected device having bi-directional
communications capability.
Distribution Server
FIG. 6 illustrates a distribution server system
600 for directly distributing-A/V content 603. Three
distribution means are depicted - tangible media such as _
compact disc ("Cb"? or digital versatile disc ("DVD"~ 608,
the Internet 609, and a direct line connection 613. In a
given application of the distribution_server system 600, any
one, two or all three of these distribution means may be
employed. Also depending on the application, the A/V
content 603 may take different forms such as one o~ more
movies, one or more music recordings, one or more
publications, or combinations of such different forms. The
tangible media may also take different forms such as
magnetic disk or tape, or any other tangible media upon
which A/V content can be stored for future playback.
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As an example, in a music distribution
applica t ~-on, consumers may download selections of music
recordings stored in memory 602 as A/V content 603 through
the Internet 609. As another example, in a digital theater
applica t i on, some theater clients may receive selections of
movies stored in memory 602 as A/V content fi05 through the
direct 1 ine connection 613. Alternatively, other.theater
clients may receive selections of movies through hard media
such as DVD 608. As still another example, in a post-
producti on or distributed work environment application,
contractors may receive A/V content 603 for further
process ing or post-production work through any one of the
distribution means .
Included in the distribution server system 600 are
a distribution server computer 601 that processes requests
for selections from the A/V content 603, a database 606
stored in memory 605 including terms of distribution and
certain information regarding prospective recipients of the
selections, and an identification ("ID") embedder 604 for
embedding a content identification and a recipient
identification on a copy of each selection prior to
providing ~t copy to the recipient. A CD writer 607 is
also included when a~copy of the selection is provided on a
CD.
Embedding of the content identification (e.g., a
unique identification number for a selected musical
recordix~g, movie or publication) and the recipient
identification (e. g., consumer credit card number, computer
serial number, or network interface card IP address) by the
ID embedder 604 is performed using a steganographic
technique so as to deter removal of such information from
the copy being provided. Steganographic techniques are
especially useful for this purpose, because the embedded
information is hard to detect, and attempts to remove such
information generally result in severe degradation of the
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remaining material. Alternatively, watermarking techniques
may als o be used to embed the content and recipient
identif i-cations on the copy to be provided.
The database 606 may be given different names
depending upon the application that the distribution servex
system 6 00 is being used for. For example, in applications
,
where A /V content 603 is being leased or sold, it may be
referred to as a °Price Structure" database. In
applicat ions involving contractors, it may be ref erred to as
a. "Bid Stz'ucturep database. Regardless of its name, the
database 606 contains two basic types of information -
algorithms or formulas for determining terms for providing a
copy of the selected content from the A/V content 603, and
information of unauthorized copying of other A/V content
previously provided to recipients of such A/V content. This
latter type of information is referred to as the recipient's
"piracy history", and provides the basis for adjustment of
the standard terms and conditions for a prospective
recipient through the provided algorithm or formula. The
adjustment could take the form, for example, of a discount
to standard pricing for a good piracy history, a premium to
standard pricing or complete withholding of a requested
selection for a bad piracy history, or perhaps issuance of
coupons for subsequent purchases or even awards of some
other kind depending upon the prospective recipient's piracy
history.
The recipient identification may take a number of
different foxrns. Where a recipient computer such as 61.0 or
614 is used to communicate with the distribution server 601
to request and receive selections of the A/V Content 603,
the recipient identification may be the unique serial number
of the computer's microprocessor, or unique IP address
associated with the computer's network interface card.
Alternatively, the recipient identification may be
associated with the operator of the recipient computer or
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the individual requesting the selection without the use of a
computer. In such cases, a credit card number of the
operator or the individual may be used for the recipient
identifi ration. Alternatively, electronic signatures or
~ biometric infornnation may be used for the recipient
identifi c ation as use of such become accepted in electronic
commerce .
The release of credit card information may
potential 1y be viewed as less intrusive, and already a part
of a cons~er's normal e-commerce transaction psychology,
then the collection of biometric information on the consumer
or the sezial.number or IP address associated with the
consumer's computer. While some consumers may be loathe to
reveal their credit card information, a pricing differential
based ozz their willingness to allow that information to be -
embedded in the received copy of their selection is also
possible (i.e., allow the embedding of the information and
obtain a discounted rate, or prohibit the embedding and'pay
a premium rate)-. To enhance privacy, an encrypted version
20. of the credit card number or an index number or alias that
is related to the purchaser's credit card number may
alternatively be used as the recipient identification.
If a prospective recipient spoofs, the
identification of another, then subsequent detection of
unauthorized copying for selections of A/V content 603
provided to the spoofing recipient could be wrongly
attributed to the spoofed party. This would negatively
impact the spoofed-party While removing any impact to the
spoofing recipient. To minimize such activity, a secure
channel between the prospective recipient and the
distribution server 601 is desirable. In addition, a means
for the distribution server 601 to authenticate the
identification of the prospective recipient would be
necessary. Any one of a number of authentication protocols
are available for this purpose (see, e.g., Schneier, Bruce,
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Applied Cryptography: Protocols, Algorithms, and Source Code
in C, 2nd Edition, John Wiley & Sons, 1995).
FIG. 7 illustrates a distribution server system
700 for indirectly distributing A/V content 703. The
distribut ion server system 700 is indirect, because the
consumer purchases a CD 711 through a retail outlet rather
than directly from the distribution server 701. As part of
the purchasing process, a retailer client 708 transmits its
identification, the identification of the purchaser, and the
selection of A/V content 703 requested by the purchaser to
the distribution server.701. The transmission is by direct
line connection 707 which may be cable, ISDN, DSL or any
other suitable high-speed transmission path. The '
distribution server 701 checks the piracy history of the
retailer and the purchaser from its database 706, and
transmits terms for the transaction based on those piracy
histories back to the retailer client 708. The terms axe
generally determined from one or more fornnulas or algorithms
stored in database 706 or some other part of memory 905 or
memory 702.
If the purchaser accepts the transaction terms,
then the retailer client 708 transmits a download request
back to the distribution server 701. The distribution
server 701 receives the request, and causes an TD embedder
704 to embed a content identification, the retailer
identification and the purchaser identification in an
electronic copy of the purchaser's selection from the A/V
content 703. The embedding can be by a conventional
steganographic or watermarking technique. The distribution
server 701 then transmits the electronic copy back to the
retailer client 708 over the high-speed transmission path
707. The retailer client 708 receives the electronic copy,
and causes a CD writer 709 to generate the CD 710 from the
electronic copy. The hard copy CD 710 with the embedded
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identifications is then sold to the purchaser in a
conventional retail transaction.
FIG. 8 illustrates a flow diagram of a method 800
of distributing protected material. In 801., a distribution
server computer such as 601 in FIG. 6 (simply referred to ,
herein as "distribution server°) establishes a connection ,
with a client computer such as 610 or 614 in FIG. 6 (simply
referred to herein as "client") at the client computer's
request. The server and client are denoted as such in this
example s~.nce they are establishing a conventional server-
client relationship. In 802, the distribution server
receives a content identification from the client for A/V
content requested by the client. The content identification
is in the form of a number uniquely identifying the
requested A/V content. In 803, the distribution server sets
an index to the content 3.dentification. In 804, the
distribution server obtains standard pricing and a price
modification algorithm corresponding to the requested A/V
content. The pricing and modification algorithm are stored
in a memory of the distribution server.
In 805, the distribution server requests the
client for its identification. The client identification
may be the serial number of the client computer or the IP
address of its network interface card, or it may be an
identification of a requesting party. In that case, the'
identification may be a credit card number, an electronic
signature or biometric data of the individual, In 806, the
client either complies or refuses to comply with
identification request. If the client refuses to provide
the identification, then in 8.07, the distribution server
indicates to the client that the requested A/V content is
not available unless the requested identification is
provided. Then jumping to 819, the distribution server
tears down the connection with the client to end the
session. On the other hand, if the client complies and
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provide s the requested identification, then in 808, the
distribution server checks to see if there is a record of
the client identification in a piracy history database such
as 606 in FIG. 6.
If there is such a record, then in 811, the
distribution server obtains a price modification parameter
from the piracy history database that indicates a history of
unauthorized copying of previously provided A/V content to
that c1 i ent identification. On the other hand, if there is
l0 no record of the client identification in the database, then
in 809, the distribution server sets up a record for that
client identification in the database. In 810, the
distribution server next sets the counters in the database
for that client identification to zero. The distribution
server would then perform 811. In this case, however, the
price modification parameter should be zero since it is a
first record for that client identification.
In 812, the distribution server applies. the price
modification parameter to the standard pricing and price
modification algorithm to obtain modified pricing for the
requested content. In 813, the distribution server provides
the modified pricing to the client for approval. In 814, if
the client does not return an approval, then the
distribution server jumps to 819, and tears down the
connection to the client to end the session. On the other
hand, if the client returns an approval, then in 815, the
distribution server obtains the requested selection of A/V
content from its memory, and in 816, provides the client
identification, the content identification, and the
requested A/V content to an ID embedder such as 604 in FIG.
6.
In 817, the ID embedder embeds the client and
content identifications into a copy of the requested A/V
content. The ID embedder is a program that can be run on
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the distribution server, or on another computer so as to
free up the distribution server to perform other important
tasks. V~lhen performed by another computer, the distribution
server may periodically poll the other computer to determine
whether the ID embedding function has been completed. A
steganographic or watermarking technique is used for the
embedding of the identifications into the copy of .the
requested A/V content. After the embedding function is
completed, then in 818, the distribution server provides an
electroni c copy of the A/V content with embedded
i:dentifi c ations to the client. In 819, the distribution
server then tears down the connection with the client and
ends the session.
The method 800 is employed by the distribution
server system 600 to directly distribute A/V content.
Modification of the method 800 to indirectly distribute A/V
content such as performed by distribution server system.700
is straightforward. For the indirect distribution of A/V
content, in addition .to requesting, receiving, checking the
piracy history of, and embedding the content and client
identifications, a consumer identification is also
requested, received, checked for piracy history, and
embedded in the copy of the requested A/V content provided
to the consumer.
Detection Server
FIG. 9 illustrates a detection server system 900
for generating a database 904 of unauthorized copying of A/V
content such as that distributed by the distribution server
systems 600 of FIG. 6 and 700 of FIG. T. A detection server
901 processes A/V content sampled from the Internet 908 and
other distribution channels 909 to generate information for
the database 904. Although A/V content is sampled in this
example from both the Internet 908 and non-Internet
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distribution channels 909, in certain applications it may be
appropriate to sample from one or the other, but not both.
The detection server system 900 may also be employed to
generate the databases 606 of FIG. 6 and 706 of FIG. 7.
The detection server 901 samples A/V content over
the Internet 908 in this example from sharing groups 905 and
distribution sites 906. Typical types of sharing groups 905 ,
include the Napster virtual network 100 of FIG. 1 and the
Gnutella virtual network 200 of FIG. 2. To samplE A/V
l0 content from such sharing groups 905, the detection server
901 participates as a member of the group such as consumer
computer 109 in the Napster virtual network 100 or consumer
computer 204 in the Gnutella virtual network 200. It should
be appreciated that the behavior of the detection server 901
during such sampling must fit within a profile typical of
consumer computers in such groups in order to ensure that
suspicions are not aroused by its downloading activities.
Failure to maintain a profile similar to a typical consumer
computer in such groups could result in the other consumer
computers. in the case of the Gnutella virtual network 200,
or the list server, in the Case of the Napster virtual
network 100, "banning" the detection server 901 from the
sharing group. In such a situation, it may be necessary for
the detection server 901 to dynamically. alter its identity
to ensure its on-going abi3ity to perform sampling.
Examples of Internet distribution sites 906
include on-line store sites, on-line auction sites, and
other Internet sites with collections of A/V content
available for sale or trade. On the other hand, examples of
non-Internet distribution channels 909 include typical
distribution channels used for distributing pirated
materials such as flea markets, and typical retail
distribution channels such as bricks-and-mortar type stores.
Whereas sampling of A/V content from the Internet results in
procuring samples in electronic form, sampling of A/V
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content f rom non-Internet distribution channels 909
typically result in procuring samples of A/V content in
magnetic or optical media form such as tape, CD or DVD. In
this lat t er case, a digital tape, CD or DVD player first
reads the A/V content and passes it in electronic form to
the detection server 901 for processing.
Each sample of A/V content received by the
detection server 901 preferably has an identification of the
A/V content and an identification of the original recipient
of the A/V content embedded in it. To protect the embedded
identifications from being easily located in the A/V content
' and stripped off by copyright pirates, steganographic or
watermarking techniques are employed to permanently embed
the identifications in the A/V content. ID embedder 604 of
distribution server system 600 described in reference to
FIG. 6 and ID embedder 704 of distribution server system 700
described in reference to FIG. 7 are two means of embedding
such information in the A/V content.
After the distribution sewer 901 receives a
sampled copy of A/V content, it passes the copy to an ID
detector 902 to read the embedded content and recipient
identifications. The ID detector 902 employs a decryption
algorithm that is related to the steganographic or
watermarleing technique originally employed to embed the
identifications into the A/V content. Since the decryption
algorithm uses information of where and how the
identifications are embedded in the A/V-content, it is
straightforward for the decryption algorithm to separate the
embedded identifications from the underlying A/V content,
The detection server 901 then updates information
stored in the database 904 with the content and recipient
identifications extracted by the ID detector 902 from the
sampled copy of A/V content. A record including the-content
and recipient identifications for the A/V content was
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previous 1y created in the database 901 by a distribution
server system such as the distribution server system 600 of
FIG. 6 or the distribution server system 700 of FIG. 7 at
the time a copy of the A/V content was first distributed to
the recipient corresponding to the recipient identification.
The dete c tion server 901 updates that record with the
extracted content and recipient identification by
incrementing a counter in the record. The only exception to
such incrementing is when the detection server 901 detects a
first sampling of a hard copy of A/V content that was
transferred such as CD or DVD 608 of FIG. 6 or 710 of FIG.
7. Sinc a the original hard copy of the A/V content is
freely transferable, the first sampling is not counted since
it may be that original copy. The resulting count of the
counter in the record therefore represents the number of
unauthorized copies detected of the identified content and
recipient .
By.collecting a large body of information in the
database 90~. a price or terms. adjustment to the standard
pricing for subsequent purchases of A/V content by
recipients in record can provide incentives or penalties for
unauthorized copying of prior received A/V content based on
things such as:
ZS - The volume of unauthorized copying detected.
- The geographical dispersion of the unauthorized copies.
- The variety of titles unlawfully distributed by a
recipient.
- The variety of media types on which unauthorized copies
of A/V content is detected ti.-e., Internet only, CD
only, both, etc.j.
- The lack of any history of unauthorized copying
attributed to a recipient.
FIG. 10 illustrates a flow diagram of a method
1000 of generating a database of unauthorized copying of
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protected material. In the example, a detection server such
as 901 o f FIG. 9 samples A/V content available from a
Napster virtual network such as 100 of FIG. 1.
Modifications of the method to sample other sharing groups
such as described in reference to 905 of FIG. 9 and
distribution sites such as described in reference to 906 of
FIG. 9 are straightforward. Also, modification of the
method t o process samples received from noiz-Internet
distribution channels such as described in reference to 909
of FIG. 9 is also straightforward.
In 1001, the detection server sets up a connection
with the Napster list server. In 1002, the detection server
reads the list of A/V content available from various
consumer computers (also referred to simply as "clients") in
the.Naps ter virtual network, and identifies one title of A/V
content of suspicious distribution nature. The
identification in this case may simply result from the fact
that the title is known to be a hotly pirated piece of A/V
content. On the other hand, the identification may result
from complex statistical analysis of the list data. In
1003, the detection server then identifies a consumer
computer holding the identified suspicious A/V content. The
identification in this case may be based on a "first on the
lis t basis, or the identification may be based upon a
consumer computer's past history of unauthorized copying as
found in prior records. of the database that the detection
server is generating. In this latter case, it would be
necessary to associate the consumer computers with recipient
identifications in the records of the database.
In 1009, the detection server sets up a connection
with the identified consumer computer. The connection is
made possible by connecting to the address provided on the
list from the list server. In 1005, the detection server
obtains a copy~of the identified A/V content from the
identified consumer computer, and in 1006, the detection
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server then tears down the connection with the identified
consumer computer.
In 1007, the detection server provides the
obtained copy of the A/V content to an ID detector (also
referred to simply as a "watermark detector" in this
example) such as described in reference to 902 of FIG. 9.
In 1008, the detection server periodically checks whether
the ID detector has completed its task of reading the
content and original recipient identifications embedded in
the A/V content. Upon completion, in 1009, the detection
server sets up a connection with a distribution server such
as described in reference to 601 in FIG. 6 or 701 in FIG. 7.
In 1010, the detection server then'transmits the content and
recipient identifications to the distribution server so that
the distribution server, in this case, may update the
database of unauthorized copying. In 1011, the detection
server then tears downs the connection with the distriBution
server. In 1012, the detection server determines whether it
should continue sampling A/V content from the Napster list.
If the answer is yes, then the detection server jumps back
to 1002. On the other hand, if the answer is no, then in
1013, the detection server tears down the connection with
the List server and ends its session.
Distribution/Detection System
Currently operating digital theater systems
utilize a physical mail system with hard drives to
distribute encrypted and compressed movies for subsequent
projection by a digital projector. Digital projectors have
been proposed, demonstrated or deployed which are based on
either a digital micromirror device (Texas Instruments) or
light amplifiers (Hughes-JVC). In the future, it is
anticipated that distribution of content to these digital
theaters could occur by satellite, fiber optic cables,
microwave, magnetic tape media or optical media. It is
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generally accepted that digital theater systems must provide
a variety of security features to include encryption.
FIG. 11 illustrates a system 1100 for distributing
A/V content to a digital theater system arid detecting
unauthori zed copying of such A/V content. In this example,
the system 1100 includes four major subsystems: a
distribut ion server subsystem, a digital theater subsystem,
a pirate subsystem, and a detection server subsystem.
The distribution server subsystem includes a
l0 distribut ion server 1101 for controlling the distribution
process, a memory 1102 for storing A/V content 1103 that.is
to be distributed, an ID embedder 110 for embedding a
content identification into each copy of the A/V content
. 11.03 that is distributed, an encrypter 1105 for encrypting
each copy of the A/V content 1103 that is distributed, and a
memory 1106 for storing a database 1107 including
information on unauthorized copying of previously -
distributed A/V content. The memories 1102 and 11.06 may be
the same or different mass storage devices. Terms for the
distribution include standard pricing and a pricing
adjustment algorithm stored in memory 1106. Alternatively,
such terms could also be stored in memory 1104. The pricing
adjustment algorithm depends on information of unauthorized
copying of A/V content previously distributed to the digital
theater system. The A/V content 1103 in this case is a
digital movie, and the content identification for the
digital movie is a "print° number. Encryption of the copy
prior to transmission ensures a secure transmission. The
distribution server 1101 controls the ID embedder 1104 and
the encrypter 1105, and transmits the encrypted copy of the
A/V content 1103' under terms determined from information in
the database 1107 over the transmission path 1108 to the
digital theater subsystem.
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The digital theater subsystem includes a theater
client computer 1109 for controlling the presentation
process, a memory 1118 for storing the encrypted A/V content
1103' received from the distribution server subsystem, a
decrypter 1110 for decrypting the stored copy of A/V content
1103', an ID embedder 1111 for embedding a recipient
identif i cation in the decrypted copy of A/V content 1103, a ,
digital projector 1112 for projecting images from the
process ed A/V content 1103, and a screen 1113 for displaying
l0 the projected images to an audience.
The theater client computer 1109 controls the
presentation process so that at the appropriate time for
playing the digital movie, it retrieves the encrypted A/V
content 1103' from the memory 1118, causes the decrypter
1110 to decrypt the encrypted A/V content 1103', causes the
ID embedder 1111 to embed the recipient identification in
the decrypted copy of the A/V content 1103, and causes-the
digital projector 1112 to project images from the thus
processed A/V content 1103. The recipient identification in
this case is a number or code that uniquely identifies, for
example, the. theater, the projector, and the date and time
of projection. The embedding employs a~steganographic or
watermarking technique. Since the embedding is persistent
and transparent to the human psycho-visual system, its
presence does not interfere with the enjoyment of viewing
the movie.
The pirate subsystem simply includes a camcorder
1114 that a pirate uses to record an unauthorized copy of
the A/V content 1103 from the screen 1113 ("pirated copy°),
and distribution channels 1115 for distributing copies of
the pirated copy. When the pirate records the movie off the
screen 1113, however, the pirated copy will still include
the "Print ID", "Theater ID", "Projector ID" and date and
time stamp information embedded within it.
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The detection server subsystem samples A/V content
distributed through distribution channels 1115, detects
unauthori zed copies of the A/V content 1103, and provides
informat3.on for such unauthorized copies to the distribution
server 1 1 O1 so that it can update the database 1107 with
such information. An example of such a detection server
subsystem is described-in reference to 900 of FIG. 9, where
the deter tion server 1116 and the ID detector 1117 in FIG.
11 perform the functions of their respective counterparts
901 and 9 02 of FIG. 9.
FIG. 12 illustrates a system 1200 for distributing
A/V content 1206, or portions thereof,. in a post-production
system to contractors 1202, 1203 and 1204, and detecting
unauthorized copying of such distributed A/V content through
distribution channels 1213. In conventional post-production
work, a number of different contractors bid on providing
specific audio or video production services. Based on a
number of factors including the reputation of the bidders
aizd their bid prices, a publisher or content producer will
select a contractor to provide certain services. The system
1200 is~an improvement over such conventional approach since
it maintains a history of unauthorized copying attributed to
various contractors in a database 1217, and employs a terms
algorithm or formula depending on such history to adjust the
contractor bids to determine the awardees.
To illustrate operation of the system 1200 by
example, three different contractors are sho~nin (represented
by contractor computers 1202, 1203 and 1204) that have
placed bids with the publisher (represented by publisher-
computer 1201). In the first instance, contractors 1202 and
1203 are awarded the contract for producing certain types of
work on the A/V content 1206. Accordingly, the publisher
1201 distributes a copy of the A/V content 1206 to~ each
' contractor with that contractor's identification embedded in
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the copy by ID embedder 1218. The embedding employs a
steganographic or watermarking technique. In the course of
providing the agreed upon services, the contractor 1202,
however, inappropriately releases the A/V content 1206 to a
pirate duplication and distribution system (represented by
distribut ion channels 1213).
By sampling the distribution channels 1213 for
copies of A/V content 1206, and providing the sampled A/V
content t o the detection server 1214, the identity of the
contractoz' that inappropriately released the copy of A/V
content x.206 can be established by the ID detector 1215
which reads the embedded contractor identification from the
sampled copy of A%V content 1206. Upon establishing the
identity of the contractor, the detection server 1214 can
update information in database 1217 that is referred to as
the "Bid Structure Database." For subsequent bid
negotiate ons, the publisher computer 1201 functioning a~ a
distribution server such as 601 of FIG. 6 uses the
information on each of the contractor's history of re-
distributing content as an element in awarding those
subsequent contracts. For instance, the publisher computer
1201 could require Contractors that have inappropriately
released copies of A/V content previously distributed to
them to provide a bid of less then 10~ of the other two
bidders before considering awarding these subsequent
contracts to that contractor.. Alternatively, the publisher
computer 1201 could automatically remove the redistributing
contractor from consideration for subsequent bids. If all
contractors had some history of re-distributing content,
then various algorithms could be employed to val-ue this
history in the bid evaluation process.
Although the various aspects of the invention have
been described with respect to preferred embodiments, it
will be understood that the invention is entitled to full
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protecti on within the full scope of the appended claims.
For example, in addition to the examples described herein,
there are many other applications of the distribution server
system, the detection server system, and systems combining
the distribution and detection server systems. One such
application is, for example, in-flight entertainment. Also,
the A/V coritent being electronically distributed by the
distribution server may be distributed as files that can be
stored for future replay by the recipient computer system,
or it may be distributed as strewing media for a single
play on the recipient computer system such as in a "pay-for-
view" scheme. All of these and other possibilities
suggested by the described examples are to be considered
within~the full scope of the present invention.
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