Abstract: A networked personal video recording (“PVR”) system couples a plurality of clients to one or more PVR media servers over a network. One or more PVR media servers include television tuners to tune television signals. A storage medium buffers the television signals to implement PVR functionality. For example, the PVR media server records television programs for clients. Clients are assigned to television tuners, and the clients display television programs received at the assigned tuner. The network transfers the buffered television signals to the clients.

Abstract: Techniques for watermarking and distributing are provided. Content is broken into frames, each frame includes a watermark. Resources request the content and each frame of each resource's acquired version of the content includes a watermark. The frames of each resource's acquired version of the content form unique watermark sequences or unique keys. Each watermark sequence or key is uniquely associated with a particular resource. Each resource is also provided one or more delivery plans for acquiring that resource's uniquely watermark and sequenced version of the content over the network.

Abstract: Recording data to be recorded on an optical disc such as a DVD has at least one video title set having content data files having a video object data set, a video title set information file for the video title set and video manager information. The recording data also has a volume file system information having data relating to file identification for enabling location of content data files. In order to inhibit copying by a file-by-file copying apparatus data relating to file identification in the volume information for at least one of the content data files is caused to be incorrect, for example altered The incorrect information may be at least one of a file start address, a file length, incorrect error detection data, a pointer to a corrupt video title set information file rather than the correct video title set information file.

Abstract: A computer network having a requesting node and a providing node permits data transfer therebetween when permitted by an authorizing node. Reports generated in response to authorizations and reports generated in response to data transfers are reconciled at a reconciliation node to improve the accuracy of payments collected and paid for use of the data. Such payments include copyright royalties for audio, video, and other works recorded in digital format.

Abstract: A user interface is implemented on a client device remote from a host device. The host device operates an application program that implements a user interface, such as an electronic programming guide or a guide for a personal video recorder, that permits a user to control at least one target device. The host device transfers to the client device an identification of at least one scene. In general, a scene defines an abstract layout for at least one screen display of the user interface. The client device generates at least one screen display for the scene based on its interpretation of the scene. The client device then displays the screen as an implementation of the user interface. Thereafter, a user initiates, using the client device, an operation to control the target device. In response, the target device performs the operation. The host device may also display information at a client device. For example, the host device may transmit information about a media currently playing at the client device.

Abstract: According to one embodiment, a method is described. The method includes receiving a request at a control module from a first remote device to access media data from a storage management module and determining that a first user is requesting access to the data based upon a first remote identification (ID). The method further includes opening a second stream between the playback module and the storage management module and receiving the data at the playback module.

Abstract: Techniques for watermarking and distributing are provided. Content is broken into frames, each frame includes a watermark. Resources request the content and each frame of each resource's acquired version of the content includes a watermark. The frames of each resource's acquired version of the content form unique watermark sequences or unique keys. Each watermark sequence or key is uniquely associated with a particular resource. Each resource is also provided one or more delivery plans for acquiring that resource's uniquely watermark and sequenced version of the content over the network.

Abstract: A method and apparatus for enabling a licensed end user to record digital data as described is particularly useful to the music industry as it enables them to make audio data available over the internet but to retain control of the uses to which that audio data can be put. Thus, upon completing a financial transaction to pay for the required audio tracks, the end user is enabled to download and decrypt encrypted music tracks and to play them on the end user's personal computer. The end user can also be allowed to burn a CD including the downloaded music tracks. However, the end user is only enabled to decrypt and record the music tracks onto the CD if the music tracks are recorded together with copy protection.

Abstract: Enhancements to a video anticopying process that causes an abnormally low amplitude video signal to be recorded on an illegal copy. The enhancements in one version introduce into the overscan portion of the television picture, just prior to the horizontal or vertical sync signals but in active video, a negative going waveform that appears to the television receiver or videotape recorder to be a sync signal, thereby causing an early horizontal or vertical retrace. One version provides (in the right overscan portion of the picture), a checker pattern of alternating gray and black areas which causes the TV set on which the illegal copy is played to horizontally retrace earlier than normal in selected lines with a consequential horizontal shift of the picture information on those lines. This substantially degrades picture viewability. In another version a gray pattern at the bottom overscan portion of the picture causes vertical picture instability.

Abstract: Method and apparatus for content control of television signals which operate over multiple television standards and include flags, control bits, data copy, copy protection signals and/or video modification signals. Content control for high definition television signals is provided operative with television-type devices, such as television transmitters, signal translators, recorders, players and others. This approach to content control is intended to operate both with the legacy analog television standards and new higher definition television standards, including the various HDTV standards to convert and detect content control information for use across standards.

Abstract: A method of copy protecting optical discs uses the differences in capability between the encoder associated with a laser beam recorder and that in currently available CD writers. Digital sum value (DSV) is a property of the encoded data on CDs and an encoder, which controls a laser beam recorder may be able to choose a pattern of merge bits which result in the overall DSV having optimal properties. During mastering of a CD, data patterns are added to the disc to provide an authenticating signature. These data patterns are chosen to cause DSV problems. Currently available CD writers have been found to have difficulty writing an authenticating signature of the type described without producing a resulting CD which has severe readability problems. Thus, the copy disc written by the CD writer will result in a CD reader returning corrupted data or information signalling a read error.

Abstract: A networked personal video recording (“PVR”) system couples a plurality of clients to one or more PVR media servers over a network. One or more PVR media servers include television tuners to tune television signals. A storage medium buffers the television signals to implement PVR functionality. For example, the PVR media server records television programs for clients. Clients are assigned to television tuners, and the clients display television programs received at the assigned tuner. The network transfers the buffered television signals to the clients.

Abstract: A networked personal video recording (“PVR”) system couples a plurality of clients to one or more PVR media servers over a network. One or more PVR media servers include television tuners to tune television signals. A storage medium buffers the television signals to implement PVR functionality. For example, the PVR media server records television programs for clients. Clients are assigned to television tuners, and the clients display television programs received at the assigned tuner. The network transfers the buffered television signals to the clients.

Abstract: The method and apparatus described utilise the fact that CDs manufactured from the same master will have distinctive physical characteristics attributable to the physical manufacturing process of the master to distinguish counterfeit CDs from genuine discs. For a genuine disc, the relative angular orientation of specified sections of the recorded data are determined and recorded. The relative angular orientation of the same sections of data on a test disc are also determined. Where the relative angular orientations are the same it is concluded that the test disc derives from the same source as the genuine disc and is therefore bona fide. Where there is no correlation, the test disc may be identified as counterfeit. The relative angular orientations, or other physical characteristics of the discs, may be physically measured, or may be calculated from information gained by reading the data on the disc. The disclosed technique can also be used to copy protect discs.

Abstract: A method and system of providing copy protection of video analog and digital signals and the like, wherein the signals are transmitted via a digital delivery network, and may comprise, for example, pay-per-view (PPV) program materials protected by copyrights of respective program rights holders. The right holders authorize video service providers (3) to apply copy protection to the program material. The copy protection process is supplied to the rights holders or the service providers (3) by a copy protection process licensor. The video service providers (3) supply suitable copy protection control software via respective control and billing (tracking) centers to generate commands which activate, control and reconfigure the copy protection process being applied to the programs being transmitted.

Abstract: A television (TV) monitor or receiver normally displays only the active portion of a video signal, and generally the HBI (horizontal blanking interval) and/or the VBI (vertical blanking interval) are not displayed. In some TV displays however, there is provision to display at least a portion of a blanking interval (overscan area). In some displays (such as monitors for professional use) the VBI is displayed as a way to allow the user to monitor test, command, and/or reference signals. If there are added pulses such as the well known copy protection signals present in blanking intervals of the video signal that cause a horizontal (or vertical) timing or recovery circuit to result in erroneous timing, then viewing is impaired of at least one blanking interval for the TV display. For example, if added copy protection pulses in the VBI region cause the horizontal phase lock loop circuit in a TV display to cause a mistiming, then viewing of signals in the VBI (overscan area) will be impaired.

Abstract: Software is securely distributed with limited usage rights. The software may be an executable program and/or one or more data files such as image or multimedia data files. The software includes an access control object which prevents at least some usage of the software without the use of a first access control code. The first access control code is produced based on selected information characteristic of the user's computer system. The access control code is produced in a server computer to which the user directs a request for the access control code. The user makes a payment to receive the access control code, which is then downloaded to the user's computer system.

Abstract: A method for recording data on an optical medium is disclosed. In one embodiment, the method includes receiving a first plurality of frames of data at a Cross Interleave Reed-Solomon Code (CIRC) encoder, encoding the first plurality of frames of data by the CIRC encoder to generate a second plurality of frames of data, generating a set of data to form a Q sub-channel, altering selected data bits in the Q sub-channel to form an encoded Q sub-channel, forming a plurality of control bytes including the encoded Q sub-channel, adding one of the control bytes to each one of the second plurality of frames of data to generate a third plurality of frames of data, encoding selected portions of the third plurality of frames of data by an EFM encoder to generate a plurality of channel frames, and recording the channel frames on the optical medium. This method allows CDs to be recorded that cannot be played by conventional CD players.

Abstract: Enhancements to a video anticopying process that causes an abnormally low amplitude video signal to be recorded on a illegal copy. The enhancement in one version include a negative going waveform that appears to the television receiver or videotape recorder to be a sync signal, thereby causing an early horizontal or vertical retrace. In another version, selected horizontal sync pulses are narrowed, causing irregular vertical retraces. In another version, post-pseudo sync pulses that have a minimum level above the minimum level of sync pulses are added to enhance anti-copy effectiveness. The post pseudo-sync pulses may be amplitude modulated.

Abstract: A method and apparatus for disabling the effect of copy-protect signals placed in a recording video signals which is based on differences in the characteristics of television and VCR circuitry. Copy-protect signals include pseudo-sync pulses and/or added AGC pulses in the blanking interval of a video signal. The specific method described includes altering the level of the video signal during the vertical blanking interval, e.g., level-shifting, so as to render the copy-protect copy protection signals ineffective to prevent in preventing unauthorized copying by a VCR. A circuit for achieving the method includes a sync separator for detecting the vertical blanking interval, pulse generating circuits for producing pulses of predetermined widths during this interval, and a summing circuit for summing the predetermined pulses with copy-protect signals thereby to shift their level.