Abstract: A method for image processing includes storing a data string and applying a background modulation to an image. The modulation includes a periodic spatial pattern of chromatic variations over an area of the image with a constant luminance over the area and with a spatial frequency of the chromatic variations that encodes the data string. Related apparatus and methods are included.

Abstract: An apparatus and method for applying anti-copy protection to a raster-scanned video signal are described. A square waveform 52 is added to the vertical synchronization pulses 50 of the video signal. The effect of the waveform is not apparent until it has been recorded by a video cassette recorder. The anti-copy protected video signal can therefore be viewed normally on a display device at or near to the picture quality intended by the originator of the video signal, but once recorded, exhibits a reduction in picture quality which makes the video signal quite unattractive to view.

Abstract: Playability of a copy protected video signal is improved by reducing the darkening and or venetian blind effects which tend to cause artifacts in a video signal display. To this end, the copy protection signal includes automatic gain control (AGC) signals or pulses in video lines in a portion of the active or viewable video field or frame, wherein the AGC pulses comprise non similar AGC signals from one video line to another video line. The dis-similar AGC pulses may include pulses which are deleted, blanked, attenuated, pulse width modified, modulated, etc. In addition, selected sync pulses may be pulse width, amplitude and or position modified.

Abstract: A system and method are described for rendering Compact Discs (CDs) and Digital Video Discs (DVDs) unreadable. Embodiments comprise a frame, a guide for constraining motion of the frame with respect to a disc, and at least one scraping element. Scraping elements may be positioned to damage the disc volume descriptor while the frame moves in a constrained manner relative to the disc. The guide may comprise a spindle which engages the center hole of a disc to hold the frame in a radially-fixed position. A scraping element on the frame damages the disc as the disc rotates relative to the frame. The guide may be integrated, such that the frame comprises a slot through which the disc passes. A scraping element inside the slot damages a disc as it passes through. Embodiments are hand operated, not motorized, and some have no moving parts. Embodiments also function with non-optical media.

Abstract: An information processing device, for executing content reproduction processing from an information recording medium, includes a security information processing unit for determining output messages based on security check information in a content reproduction sequence, and outputting a message output command accompanied by selection information of the output message to a user interface processing unit, and a user information processing unit for obtaining message information based on the selection information input from said security information processing unit and outputting to a display unit.

Abstract: A method for detecting whether query video data appears in a reference video, comprising determining a measure of depth from a portion of the query video data, comparing the measure against a measure of depth for the reference video to perform a depth match and, if a match is determined; comparing a visual signature derived from the query video data against a visual signature of the reference video to perform a visual match to determine a measure representing the likelihood that the query video data derives from the reference video.

Abstract: A personal media player (PMP) uses a digital media processing system—comprising a video rendering subsystem, a music rendering subsystem, and a picture rendering subsystem—to produce moving-video (video), audio (music), still-graphics (picture), and other output rendered from media files ported to the PMP from another source. The PMP further comprises a user interface system, a display unit system, a power source system, and a data port system utilizing Universal Plug and Play functionality, all of which are coupled directly or indirectly to the digital media processing system. The physical components constituting the aforementioned systems and subsystems are then encased in a portable housing unit suitable for hand-held use and ready portability.

Abstract: A copy protection method and apparatus is disclosed. Various protection signals are added to a video signal in the vicinity of the color burst part of the signal. The protection signals are selected to interfere with the frequency down conversion process in the video recorder so that the color burst cannot be recorded properly. The protection signals are chosen so that when a modified video signal containing the original video signal and the protection signals has been recorded by a video recorder, playback of the modified video signal exhibits visual artefacts that are not visible before recording of the modified signal occurred. The protection signals are also used to carry digital control information for controlling the operation of a digital recorder.

Abstract: The digital broadcast recording apparatus (100) includes a recording unit (160) for recording digital broadcast, a detection unit (170) for detecting a packet containing information regarding a portion permitted to be recorded from a stream of a program prohibited from being recorded in the digital broadcast, and a control unit (140) for controlling, when the recording unit (160) records the program prohibited from being recorded, the recording unit (160) to record the portion permitted to be recorded based on the information contained in the packet detected by the detection unit (170).

Abstract: Systems and method for processing v-chip data for an MPEG-2 decoder with personal video recording functionality are provided. In one example, a system that processes V-Chip data with personal video recording functionality may include a data transport engine and a video decoder. The video decoder may be coupled to the data transport engine and may be adapted to parse out V-Chip data.

Abstract: An apparatus determines whether a combination of a certificate type of a content certificate recorded on a source recording medium and a medium type of the source recording medium is a proper combination. If the combination is a proper combination, the apparatus requests a license server, which is connected to the apparatus via a network, to give approval to record content on a target recording medium. If the apparatus is a legitimate DVD recorder, the license server sends to the content recording apparatus a content certificate including on the source recording medium as the certificate type. The apparatus records the content together with the received content certificate on the target recording medium.

Abstract: A portable RFID device includes an analog modulation radio frequency transmitter and a data storage holding audio data files. In response to user entered commands the device retrieves the audio data files, applies digital to analog conversion to generate analog audio signals, and transmits the analog audio signals through the analog modulation RF amplifier. Optionally, the analog modulation RF amplifier is a frequency modulation (FM) modulator and transmitter, optionally using a UHF broadcast FM band. The transmitted analog modulated RF signal is received and played by a receiver and playback device proximal to the transmitter. Optionally, a locking operation is applied after storing the multimedia files, preventing subsequent altering of the files.

Abstract: A method for copy protection includes providing audiovisual or audio data stored in sectors of a record carrier having a file system, and providing additional or modified data to be stored in further sectors. The method includes generating a first file of the file system referencing at least a part of the sectors and none of the further sectors, so when the first file is rendered by a playback device, the data is reproduced which is included in the part of the sectors. The method also includes generating a second file of the file system being another file than the first file and referencing at least a part of the sectors and further referencing at least one of the further sectors, such that when the second file is rendered by the playback device the part of the sectors and the at least one of the further sectors are reproduced.

Abstract: In an apparatus capable of mounting a recording medium for recording content data, an information acquisition section acquires protection information from a server, which indicates whether or not content data supplied from the server needs to be protected. A protection determination section determines whether or not the content data needs to be protected according to the protection information. When the content data needs to be protected, an ID determination section further determines whether or not a unique identification code is provided which uniquely identifies a recording medium mounted on the apparatus. When the recording medium has the unique identification, a recording destination settling section settles that recording medium to be a content recording destination. A data acquisition section acquires content data from the server. An encryption section encrypts the acquired content data using the unique identification code.

Abstract: Copying, dubbing or reproducing copyrighted digital data can be inhibited or restricted to properly protect a copyright. AV data recorded on a pre-recorded tape is output from a reproducing unit of a first digital VCR with protective information indicating whether the copy of the AV data is inhibited or not. The protective information is input with the A/V data to a second digital VCR. Copy permission information of a blank tape loaded in the second digital VCR is discriminated and the second digital VCR records the AV data supplied from the first digital VCR based on the protective information and the copy permission information.

Abstract: To provide a content playback device that can use content appropriately by avoiding output of content not permitted to be used according to contract information. A playback control unit 102 extracts a content name from playback control information in a playback path information table 210, and inquires of a rights management unit 108 whether content identified by the extracted content name is playable or not. If the content is judged as being unplayable, the playback control unit 102 extracts an alternative playback number from the playback control information, and extracts a content name from playback control information whose playback number matches the alternative playback number. The playback control unit 102 then instructs a decryption unit 103 and a playback unit 107 to decrypt and play back encrypted content identified by the extracted content name.

Abstract: A digital information recording apparatus includes a recording circuit for recording information of a retention period included in the digital information and indicating a period for permitting the digital information to be held in the recording medium, starting with a time at which the digital information is recorded on the recording medium; and information of a playback permission period included in the digital information and indicating a period for permitting the digital information to be played back starting with a time at which the information is reproduced initially following recording of the digital information on the recording medium, permitting temporary recording or copying for the information permitted for “copy never” or “copy one generation.

Abstract: Embodiments of methods, apparatuses, devices and systems associated with video fingerprinting are disclosed.

Abstract: Provided is a method capable of suppressing generation of data that needs to undergo a complicated copyright process for redistribution thereof. The method includes: executing a program and outputting and displaying a screen generated by the program; reproducing and outputting user-acquired audio acquired arbitrarily by a user; recording the screen output during a specified period along with the user-acquired audio, as video data; and restricting recording of the video data while the user-acquired audio is being output.

Abstract: A main stream contains successive content elements of video and/or audio information that encode video and/or audio information at a first data rate. A computation circuit (144) computes main fingerprints from the successive content elements. A reference stream is received having a second data rate lower than the first data rate. The reference stream defines a sequence of the reference fingerprints. A comparator unit (144) compares the main fingerprints with the reference fingerprints. The main stream is monitored for the presence of inserted content elements between original content elements, where the original content elements have main fingerprints that match successive reference fingerprints and the inserted content elements have main fingerprints that do not match reference fingerprints. Rendering of inserted content elements to be skipped. In an embodiment when more than one content element matches only one is rendered.

Abstract: A method for calculating file size of video data stored in a digital video recorder (DVR) device includes storing video data having segments and index data including file size information associated with segments of the video data. The method also includes enabling an interval to export a selected portion of video data among the video data stored in the DVR device to a storage unit. The A method further includes reading the index data including the file size information associated with the video data stored in the DVR device and obtaining file size information from the read the index data in response to the enabled interval In addition, calculating a size of video data to be exported based on the obtained file size information.

Abstract: A program recording assist apparatus is configured to notify permission or inhibition of copying or moving of program data of an unrecorded program designated to be recorded, before recording or moving the program data to a recording medium. The apparatus includes a determination unit configured to determine permission or inhibition of sequential recording or moving of the program data to a plurality of recording mediums based on a copy control attribute of the program, type of recording medium, and a recording mode used at a time of recording to the recording medium, and a control unit configured to display a path capable of recording or moving the program data to the plurality of recording mediums on a display device based on the result determined by the determination unit.

Abstract: A method for copy protection includes providing audiovisual or audio data stored in sectors of a record carrier having a file system, and providing additional data to be stored in further sectors. The method includes generating first and second files referencing respective first and second parts of the sectors and respective further first and second parts of the further sectors, so when the first and second files are completely rendered by a playback device, respective first and second parts of the data and respective further first and second parts of the additional data are reproduced. The method also includes determining program instructions, which when executed by the playback device, control switching between reading the first file and the second file, and when the record carrier is an original, switching is controlled so only the sectors and none of the further sectors are read such that no additional data is reproduced.

Abstract: The media player employs an operating system that supports a virtual machine into which auto-run playback programs may be loaded and run. The auto run playback program is stored on the media containing the program content, such as on an optical disc medium. When the medium is inserted in the player, the auto run playback program automatically launches and is thereafter used to access playback the media content. Support for legacy media is provided to allow the player to playback compact discs and DVD discs that were manufactured without the auto run playback program.

Abstract: A method for detecting whether query video data appears in a reference video, comprising determining a measure of depth from a portion of the query video data, comparing the measure against a measure of depth for the reference video to perform a depth match and, if a match is determined; comparing a visual signature derived from the query video data against a visual signature of the reference video to perform a visual match to determine a measure representing the likelihood that the query video data derives from the reference video.

Abstract: A high definition television video content management and/or copy protection method and apparatus are achieved by modifying portions of one or more channels of an HDTV (high definition television) signal. These modifications are generally in the blanking intervals but can extend into the overscanned portions. In one version, the signal modification defines tags or trigger bits for a content control system. This modification may follow the HDTV tri-level sync (synchronization) pulses for example, and it may occur in at least one of the HDTV video channels. In another version, portions of the tri-level sync pulse are modified to cause a reference sensing circuit such an AGC system (in a receiving device such as a video recorder) to produce an erroneous output. Optionally, a signal may be added or inserted following the modified tri-level sync pulses. In another version, tri-level pseudo sync pulses are added in blanking or overscanned intervals.

Abstract: In the Local Storage (18), a plurality of files, merge management information which specifies a file out of the plurality of files to be used in combination with what is recorded on a Read-Only recording medium, and signature information used for judging the authenticity of the merge management information. The Virtual File System unit (38) judges the authenticity of the merge management information based on the signature information. In the case where the merge management information is judged to be authentic, the Virtual File System unit (38) generates package information which indicates a new file structure obtained by adding the file specified by the merge management information to the file structure of the Read-Only recording medium.

Abstract: The digital signal recording/reproducing apparatus inputs a digital signal having a control flag as to a temporary copy permission, and records the digital signal temporarily into a recording medium in accordance with conditions in the control flag, then reproducing the digital signal temporarily from the recording medium in accordance with the conditions in the control flag. The recording/reproducing of the temporary copy is permitted, depending on the following conditions: The recording medium's type, the reproducing point-in-time, the reproducing time-period, and the reproducing frequency. With this method employed, even in a program permitting no recording, the temporary recording/reproducing is permitted under a condition of being limited to the time-shift recording on the receiving side.

Abstract: A technique for achieving secure content distribution with increased copyright protection is disclosed. A content delivery apparatus is network connected to in-home/out-home content reproducible receiver devices, including digital TV sets, mobile phones or the like. The content delivery apparatus includes an optical disk drive, a built-in large capacity storage, a content list transmission unit responsive to receipt of a content list acquisition request from a content receiver device, for transmitting a list of contents recorded on an optical disk loaded in the optical drive and stored in the storage, and a content transmission unit responsive to a content and storage and for delivering it to the receiver. In cases where the content demanded is on the optical disk, if the receiver is currently outside an architectural structure with the apparatus installed therein, the content delivery to such receiver is prevented.

Abstract: A method and apparatus for protecting against copying high definition (HD) contents transmitted in a wireless HD (WiHD) network by using a WiHD source or sink device, the method including: determining a type of copy protection of contents transmitted in the WiHD network; calculating accumulatively a number of media access control (MAC) sub-packets as a input counter information, wherein the MAC sub packets constitute a MAC payload including the contents; packetizing the type of copy protection and the input counter information into a MAC packet; and transmitting the MAC packet to a WiHD sink device.

Abstract: A movie video player able to differentiate data set at the time of an incoming call and thereby able to prevent copyright infringement when switching sound data, that is, a movie player comprising a movie playback unit for playing back a movie including audio and video, a display unit able to display at least the played back movie and text, a text-to-speech unit having a text-to-speech function of converting to speech text being displayed on the display unit and the state of the device, and a controller, wherein when a predetermined event occurs for starting up the text-to-speech function during the playback of a movie, the controller stops only the audio output of the movie and activates the text-to-speech function in a first case where the video and audio data can be separated, and the controller stops both the video and audio data of the movie and activates the text-to-speech function in a second case where the video and audio cannot be separated, and a mobile terminal and a data processing method of a mob

Abstract: To provide a playback device that plays back a content recorded in an optical disc in conjunction with execution of an application supplied by a server. The playback device includes a disc region code detection unit operable to detect a region code from the optical disc; an application region code estimation unit operable to estimate a region code assigned to the application based on an address of the server; a restriction unit operable, if a region code assigned to the playback device, the region code detected from the optical disc, and the estimated region code assigned to the application do not match each other, to restrict the playback of the content in conjunction with the execution of the application.

Abstract: A provisioning device intercepts program content from a video client or another multimedia device, where the program content includes copy-protection encryption, and receives additional content from a local router or another networked device, where the additional content is Internet protocol (IP) content. The provisioning device removes the copy-protection encryption from the program content and combines the additional content with the program content. The provisioning device also adds copy-protection encryption to the combined additional content and program content, and sends the copy-protected combined content to a display device.

Abstract: A digital information recording apparatus includes a recording circuit for recording information of a retention period included in the digital information and indicating a period for permitting the digital information to be held in the recording medium, starting with a time at which the digital information is recorded on the recording medium; and information of a playback permission period included in the digital information and indicating a period for permitting the digital information to be played back starting with a time at which the information is reproduced initially following recording of the digital information on the recording medium, permitting temporary recording or copying for the information permitted for “copy never” or “copy one generation.

Abstract: A method and system for analyzing and marking a film include determining color conditions which define colors compatible with a proposed mark, retrieving a number of consecutive frames to be marked, and determining potential marking areas within an image of each frame of the film. The color components associated with each potential marking area are analyzed to generate color values, and the color values of each of the potential marking areas are compared with the respective color conditions for determining ideal marking areas. Actual marking locations in the film are determined from the determined ideal marking areas.

Abstract: A first information recorder comprises a limited number-of-times of copying information setting unit for setting information on the limited number-of-times of copying electronic data, a first limited number-of-times of copying information updating unit for reading out the electronic data from a first information recording medium containing electronic data set with limited number of times of copying information by the limited number-of-times of copying information setting unit and updating the limited number-of-times of copying information set with respect to the electronic data, and a first transmitter for transmitting electronic data whose limited number-of-times of copying information is updated by the first limited number of times of copying information updating unit.

Abstract: An audiovisual information data processing apparatus includes: data forming means for forming content list data representing lists concerning audiovisual information data stored in a hard disk drive; image display means for performing image display for the lists; attribute information detecting means for detecting, for the audiovisual information data included in the lists, the reproduction limitation information; reproduction limited data recognizing means for recognizing audiovisual information data, which comes into a state in which reproduction limitation functions, of the audiovisual information data included in the lists as reproduction limited data with reference to the detected reproduction limitation information; and image display control means for setting a display portion concerning the audiovisual information data, which is recognized as the reproduction limited data in the image display for the lists, as a portion where specific display is performed.

Abstract: A receiving terminal comprises a data acquiring unit which acquires from the content server information that is required for the export of the content and that includes information about a capability required for the receiving terminal and information about a capability required for the removable medium, a propriety judgment unit which compares the information about the capability required for the receiving terminal with information about a capability the receiving terminal possesses, compares the information about the capability required for the removable medium with information about a capability the removable medium possesses, and judges whether the export processing of the content can be performed or not, and a control unit which makes a processing relevant to a purchase of the content or to the export of the content perform, according to a judgment result by the propriety judgment unit.

Abstract: A recording and reproducing apparatus (1) includes: an AV recording medium (26) recording an AV data item; a transmitting and receiving unit (21) transmitting and receiving the item and information on the item to and from an other apparatus connected to the apparatus (1) via a network; a retrieving unit (28) retrieving AV data items that indicate a same program and are recorded on the AV recording medium and in the other apparatus; a comparing unit (29) comparing image qualities of the items; and a restriction value control unit (30) moving use restriction values through the transmitting and receiving unit so that, based on a result of the comparison, (i) a use restriction value of one of the items having a lower image quality is decreased by a predetermined value and (ii) a use restriction value of an other one of the items having a higher image quality is increased by the predetermined value.

Abstract: A method and apparatus for creating an enhanced photo digital video disc (DVD) communicates with connected sources such as a digital camera, PC, or memory card where information such as digital photo, movie and music files are downloaded, as selected by the user, and stored on a storage device. The user creates slide shows of photos stored on the storage device that show each photo and/or movie in sequence or with transition special effects between photos. The invention extracts photo metadata from the photo image file and stores the information on the storage device along with the photos and Includes any audio annotation(s) associated with the downloaded photos and downloaded audio files that the user can attach to a photo in the slide show. When the user wants to save slide show(s) to a DVD the invention constructs an MPEG stream containing the photos, movies, and audio annotations. Photo metadata are encoded onto the DVD as closed captioning and/or subpictures, selectable for display at viewing time.

Abstract: In one embodiment, a method of controlling distribution of content can include: sending authentication instructions from a server to a disc player having a disc inserted therein, where the disc includes media content without a plurality of files that are required by the disc player for playback of the media content; determining if the disc in the disc player is valid by comparing information received from the disc player against information stored in a database; receiving viewer verification information from the disc player to determine if the viewer is authorized to view the playback of the media content on the disc; sending an error indication if the disc is not valid and/or the viewer is not authorized; and sending the plurality of files that are required for the playback of the media content from the server to the disc player if the viewer is authorized and the disc is valid.

Abstract: A new copy protection signal includes resistance to certain circumvention devices and includes improved playability. The new copy protection signal causes the certain circumvention devices to pass substantially the copy protection effects to a video recorder or to allow for content control effectiveness on a compliant device. The new copy protection signal also causes the circumvention device to add or enhance copy protection effectiveness, which is contrary to the circumvention device's original intent of removing or reducing copy protection effectiveness. The new copy protection signal is provided by inserting or adding one or more pseudo sync pulses or one or more pseudo sync/AGC pulse pairs immediately after, or one line after, a vertical sync signal in at least one television line.

Abstract: A content receiver comprises: an acceptance unit for accepting a designation of a recording medium to which contents are to he output; a license information acquiring unit for acquiring output license information describing the output requirements of the contents; and an output unit for outputting the contents to the designated recording medium The output license information includes usage time limit information indicating the time limit of using the contents in an output destination. The output unit acquires the usage time limit information from the output license information for the contents, and sets the acquired usage time limit information to a management information storing area in the designated recording medium, thereby managing the time period of using the contents in the recording medium even if the copyright protection of the recording medium, which is an export destination, has a function to manage the time period of using the contents.

Abstract: An information management method for managing whether to allow playback of copyrighted content includes an invalidating step, executed by playback management means when an invalidating request for content recorded on a recording medium is received, of registering the content in playback-management information as being in a playback-prohibition state; a playback processing step, executed by playback controlling means when a playback request for content on the recording medium is received, of permitting playback only when the content is not in the playback-prohibition state with reference to the playback-management information; and an invalidation canceling step, executed by the playback controlling means when playback-permission information associated with content in the playback-prohibition state is obtained, of updating the playback-management information so that the playback-prohibition state of the content is canceled.

Abstract: A video signal is processed to selectively permit copying by superposing in that portion of the video signal which does not contain useful picture information a copyright information signal indicative of whether the viewable picture that is displayed from the video signal is subject to copyright and a copy generation signal indicative of the number of successive generations of copies that can be made from the video signal.

Abstract: A copy prevention method and apparatus of a digital magnetic recording/reproducing system performs the copy prevention function by encoding to insert a marker involving copy prevention function information and executing the function and allows a program supplier to realize a desired copy prevention function of various patterns, in which the marker formed by a control word for scrambling audio and video bit straps and copy prevention information for preventing an illegal copy is encrypted by an encoded key to be multiplexed with the audio and video bit strips scrambled by the control word. The marker transmitted is detected from the bit strips to be decrypted and analyzed by the encoded key to determine whether the copy is permitted or not, so that the detected marker is updated to be recorded on a video tape and the control word is produced from the marker to perform the descrambling to supply the result to a monitor to be displayed.

Abstract: A copy prevention method and apparatus of a digital magnetic recording/reproducing system performs the copy prevention function by encoding to insert a marker involving copy prevention function information and executing the function and allows a program supplier to realize a desired copy prevention function of various patterns, in which the marker formed by a control word for scrambling audio and video bit straps and copy prevention information for preventing an illegal copy is encrypted by an encoded key to be multiplexed with the audio and video bit strips scrambled by the control word. The marker transmitted is detected from the bit strips to be decrypted and analyzed by the encoded key to determine whether the copy is permitted or not, so that the detected marker is updated to be recorded on a video tape and the control word is produced from the marker to perform the descrambling to supply the result to a monitor to be displayed.

Abstract: A copy prevention method and apparatus of a digital magnetic recording/reproducing system performs the copy prevention function by encoding to insert a marker involving copy prevention function information and executing the function and allows a program supplier to realize a desired copy prevention function of various patterns, in which the marker formed by a control word for scrambling audio and video bit straps and copy prevention information for preventing an illegal copy is encrypted by an encoded key to be multiplexed with the audio and video bit strips scrambled by the control word. The marker transmitted is detected from the bit strips to be decrypted and analyzed by the encoded key to determine whether the copy is permitted or not, so that the detected marker is updated to be recorded on a video tape and the control word is produced from the marker to perform the descrambling to supply the result to a monitor to be displayed.

Abstract: A copy prevention method and apparatus of a digital magnetic recording/reproducing system performs the copy prevention function by encoding to insert a marker involving copy prevention function information and executing the function and allows a program supplier to realize a desired copy prevention function of various patterns, in which the marker formed by a control word for scrambling audio and video bit straps and copy prevention information for preventing an illegal copy is encrypted by an encoded key to be multiplexed with the audio and video bit strips scrambled by the control word. The marker transmitted is detected from the bit strips to be decrypted and analyzed by the encoded key to determine whether the copy is permitted or not, so that the detected marker is updated to be recorded on a video tape and the control word is produced from the marker to perform the descrambling to supply the result to a monitor to be displayed.

Abstract: A method and apparatus for protecting access to audio and/or video data is accomplished when data is received, where the data may be audio data and/or video data. Having received the data, it is interpreted to determine whether an embedded data access parameter is active. If so, an indication of the particular type of data access is generated. The data access parameter may control access to the data as at least one of: copy restrictions, viewing restrictions, and/or use restrictions. The indication is subsequently provided to a computer system such that unauthorized accessing, including unauthorized copying, of the video and/or audio data is prohibited.