376results about "Single television signal transmission by single carrier" patented technology

A method and apparatus for improving the reception of digitally modulated signals. A main signal and a supplemental signal are provided in the transmitter. The signals may be substantially identical except that the supplemental signal is advanced in time with respect to the main signal. The main and supplemental signals are sent from the transmitter to the receiver modulated on a signal. At the receiver, the supplemental signal is stored in a buffer. If the main signal is undesirably changed during transmission, corresponding portions of the supplement signal are substituted for the undesired portions of the main signal.

Control of audio / video equipment is provided by an apparatus constructed like a computer, with audio and video subsystems. The audio subsystem includes a programmable analog mixer and several analog and digital multiplexers to route and mix multiple inputs to multiple outputs. Databases are stored in computer mass storage to record preferences for playback of digital versatile discs, compact discs and audio files stored in the mass storage device, such as MP3 files. The playback preferences may include video output format, language, surround sound mode, etc. for DVDs and surround sound effects for CDs and audio files.

A system and method for the on-demand transcoding of media content from a source type to a destination type is provided, wherein the system includes a plurality of transcoders for transcoding from a plurality of source types to a plurality of destination types, and wherein the system receives a transcoding request for media content, fetches the media content in response to the transcoding request, sends the media content to one of the plurality of transcoders based on the source type and destination type, transcodes the media content from the source type to the destination type, thereby generating transcoded media content, and transmits the transcoded media content. The system fetches, sends, and transcodes the media content and transmits the transcoded media content in a pipelined fashion. The system also provides for the publication of media content as a file or stream of digital data, for the archiving of media content, and the caching of transcoded media content to improve system efficiency.

The present invention provides a content locating method and a content delivery network node. In this case, the content locating method provided by the present invention comprises: receiving by a first content delivery network CDN node a service request sent by a service control function entity or an IPTV service control function entity, wherein this service request carries a content identifier which is used to indicate requesting content corresponding to this content identifier; if the first CDN node cannot provide the content service requested by the service request, then the first CDN node sends an inquiry request to a CDN global controller so as to acquire the information about a second CDN node which can provide the content service requested by the service request and request the second CDN node to provide the content service. By way of the present invention, the pressure of the CDN global controller can be reduced and the processing delay of CDN can be shortened.

A display data packet contains identification information. A display unit communication system comprises a control unit, a terminal adaptor to which a terminal adaptor ID is assigned and which is connected to the control unit, and a display unit to which a display unit ID is assigned and which is connected to the terminal adaptor in series and drives a display element according to the display data packet supplied from the control unit. The terminal adaptor receives a display data packet the terminal adaptor ID of which agrees with that contained in the identification information and transfers the display data packet to the display unit. The display unit receives the display data packet the display unit ID of which agrees with that contained in the identification information, and drives the display element to display an image.

A column analog-to-digital converter having a voltage comparator and a counter is arranged for each a vertical signal line. The voltage comparator compares a pixel signal inputted via the vertical signal line at each row control signal line with a reference voltage, thereby generating a pulse signal having a length in time axis corresponding to the magnitude of a reset component and a signal component. The counter counts a clock to measure the width of the pulse signal until the end of the comparison operation of the comparator, and stores a count at the end of the comparison. A communication and timing controller controls the voltage comparator and the counter so that, in a first process, the voltage comparator performs a comparison operation on a reset component with the counter performing a down-counting operation, and so that, in a second process, the voltage controller performs the comparison operation on a signal component with the counter performing an up-counting operation.

A method for content delivery includes receiving a request for delivery of a still image to a client terminal. A promotional image is selected to be delivered to the client terminal together with the still image. The still image and the promotional image are processed together so as to create an image sequence containing the still image and the promotional image in a moving picture format. Responsively to the request for delivery of the still image, the image sequence is delivered over a network for display in the moving picture format by the client terminal.

A method and apparatus for recording digital video and / or audio signals include input audio and video interfaces, a memory, a video frame selector, and output audio and video interfaces. In an alternate embodiment, the method and apparatus include input audio and video interfaces, a first memory, a second memory for playback, and output audio and video interfaces. Another embodiment further includes a memory optimizer for maximizing a chosen criterion such as audio duration, image capture frequency or pixel resolution.

An adaptive digital image processor precedes an MPEG2 encoder. The processor receives a high definition video signal intended for broadcast or storage, and adaptively low-pass filters the signal. The signal is subjected to low-pass two-dimensional filtering to eliminate encoding artifacts and related noise. The video signal is then horizontally down-sampled to create a lower resolution hybrid signal. A receiver decodes and decompresses the hybrid signal. The hybrid signal is upsampled to its original resolution using existing hardware and software with a software modification.

A digital broadcasting system capable of causing any of physical channels selected by a broadcaster to be received as one of the channels available to users which is different from the physical channel selected by the broadcaster. For each of programs of each of the channels available to said users, a program information record comprising PSI (program specific information) is stored in a data base. The broadcaster is permitted to include, in the PSI, channel mapping information whose mapping destination is a channel (or a program) to be received instead of the channel for which said program information is intended. The program information records is inserted in broadcast transport streams on schedule and, if necessary, immediately after the broadcaster have included the channel mapping information in the PSI data.

A digital television receiving system having a security mechanism which simultaneously handles two or more separate television program signals is described. The system includes a plurality of digital television receiver mechanisms for receiving a plurality of separate digital television program signal transport streams. The system also includes a multiplexer mechanism coupled to the digital television receiver mechanisms for tagging and multiplexing the received program signal transport streams into a single combined signal transport stream. The combined transport stream is supplied to a security mechanism which limits usable access to the combined stream to authorized users. The system further includes a demultiplexer mechanism for receiving an access-allowed combined transport stream from the security mechanism and demultiplexing the combined transport stream into separate transport streams corresponding to the separate transport streams received by the receiver mechanisms. The system also includes circuitry responsive to at least one of the demultiplexed transport streams for supplying image signals to a television display mechanism for producing television images.

A system and method for distributing data (e.g., imaging data such as pixels, or 3D graphics data such as points, lines, or polygons) from a single or a small number of data sources to a plurality of graphical processing units (graphics processors) for processing and display is presented. The system and method provide a pipelined and multithreaded approach that prioritizes movement of the data through a high-speed multiprocessor system (or a high-speed system of networked computers), according to the system topology. Multiple threads running on multiple processors in shared memory move the data from a storage device (e.g., a disk array), through the high-speed multiprocessor system, to graphics processor memory for display and optional processing through fragment programming. The data can also be moved in the reverse direction, back through the high-speed multiprocessor system, for storage on the disk array.

A digital broadcasting system and a method of processing data are disclosed. A receiving system of the digital broadcasting system may include a signal receiving unit, a demodulating unit, a demultiplexer, and an audio / video decoder. The signal receiving unit receives a broadcast signal including main service data and an RS frame including a plurality of MPH service data packets. The demodulating unit demodulates data of the RS frame. The demultiplexer identifies an MPH service data packet including an IP datagram of mobile service data with reference to an MPH header of each MPH service data packet in the RS frame, and when a stuffing data is inserted in the identified payload of MPH service data packet, removes the stuffing data from the payload and separates an audio and video data from IP datagram of the mobile service data of the payload, and outputs the separated audio and video data.

Apparatus and methods conforming to the present invention comprise a method of controlling playback of an audio signal through analysis of a corresponding close caption signal in conjunction with analysis of the corresponding audio signal. Objection text or other specified text in the close caption signal is identified through comparison with user identified objectionable text. Upon identification of the objectionable text, the audio signal is analyzed to identify the audio portion corresponding to the objectionable text. Upon identification of the audio portion, the audio signal may be controlled to mute the audible objectionable text.

The present invention is directed to a system, method and computer program for enabling a user (100) (an auditor or a viewer) to access complementary information related to one or a plurality of sequences or topics of interest (102) in a recorded program (103) previously broadcast on the radio or television and played back on a device, such as an audio or video tape or disk recorder / player (104). The preferred embodiment of the invention relates to a system and method for enabling a person (100) listening to or watching a recorded program (103), to select one or a plurality of topics (101) (102) drawing his or her attention and for immediately receiving further information related to these topics from the World Wide Web. The system is based on the synchronization of local times (204) (205) of transmitters (201) and recorders (203). The flow of information transmitted, received and recorded is always synchronized, independently of the relative positions of recorders and transmitters. The synchronization is done referring to an absolute or universal time such as the Global Positioning System Time (GPS-time), the Global Orbiting Navigational Satellite System (GLONASS) time or another suitable universal time based on a satellite system. The GPS or GLONASS receivers are integrated or connected to the broadcasting stations. At the receiver side, GPS or GLONASS receivers may be integrated or connected to the audio or video recorders. The system is also based on a plurality of hyperlinks defined during the production and recording of the broadcast program, for given sequences corresponding to particular intervals of time synchronized with the universal (absolute) time. The hyperlinks are associated wit the information that is broadcast in the program. They can be selected by users during the playback of the recorded program during predefined intervals of time and activated to access additional information and services.

The system comprises three parts: adapter in single frequency network, GPS receiver, and modulator of supporting ground digital TV broadcasting in single frequency network. At central transmitting terminal, the adapter inserts MIP packets in transmission code stream. MIP packet carries synchronizing time label relevant to GPS receiver and system maximal time delay to each relay station etc. In each relay station, synchronization system detects M1P packets, reading out time label and maximal time delay, measuring time delay of received signal, calculating out additional time delay. According to the additional time delay, TS flow is delayed properly in order to make signal synchronization again among relay stations. The disclosed scheme is realized through FPGA, and is applied to ground digital multiple media broadcasting transmission system forwaded by Tsinghua Univ. Favorable effect is obtained through actual try.

Processing a received optical signal in an optical communication network includes equalizing a received optical signal to provide an equalized signal, demodulating the equalized signal according to an m-ary modulation format to provide a demodulated signal, decoding the demodulated signal according to an inner code to provide an inner-decoded signal, and decoding the inner-decoded signal according to an outer code. Other aspects include other features such as equalizing an optical channel including storing channel characteristics for the optical channel associated with a client, loading the stored channel characteristics during a waiting period between bursts on the channel, and equalizing a received burst from the client using the loaded channel characteristics.

A communication system including a transmitter, a receiver, and a TMDS-like link, in which video data and auxiliary data (typically including timing data associated with other auxiliary data) are transmitted from the transmitter to the receiver, or in which video data are transmitted over the link from the transmitter to the receiver, and auxiliary data (typically including timing data associated with other auxiliary data) are transmitted from the receiver to the transmitter. In typical embodiments the auxiliary data include one or more streams of audio data. Other aspects are transmitters and receivers for use in such a system, methods for sending auxiliary data and video data over a TMDS-like link, methods for transmitting and recovering clocks for auxiliary data transmitted over such a link, methods for synchronizing auxiliary data transmitted over such a link with video data transmitted over such a link, and methods for generating clocks having frequency closely matching the rate at which the auxiliary data are transmitted over such a link.

Streaming transcoder with adaptive upstream and downstream transcode coordination. A real-time transcoding environment is operative such that scalable video coding (SVC) is implemented to operate both upstream and downstream directions with respect to a middling device or transcoder such that the middling device or transcoder asked to coordinate upstream SVC with downstream SVC. Such upstream / downstream SVC coordination may also employ local considerations such as processing resources, available memory, etc. of the middling device or transcoder. Also, characteristics associated with one or more other devices, communication links, communication networks, etc. may be used to direct such adaptation. Moreover, control and / or feedback signaling between respective devices may also be used to assist in the adaptive operation of such a real-time transcoding environment. Generally speaking, such coordination between upstream SVC and downstream SVC is performed automatically in a multipoint fashion considering local and / or remote characteristic(s) associated with the overall communication system.

A method of composing a multimedia slide show. In a preferred embodiment, the method comprises the steps of: selecting a plurality of digital images; encoding each of the plurality of digital images to generate a normal resolution image portion and a high resolution image portion; multiplexing each corresponding normal and high resolution image portion to generate a single high resolution still image; determining a time parameter for each of the high resolution still images; selecting an audio portion for at least one of the plurality of digital images; concatenating the plurality of high resolution still images to generate a video bitstream; generating an audio bitstream by encoding the audio portion; and multiplexing the video bitstream and audio bitstream to generate the multimedia slide show.

A recording apparatus includes a detector for detecting a video attribute, a detector for detecting an audio attribute, and an address information generator for generating specific address information which indicates a data write address at the time when the video attribute of the audio attribute changes, on the basis of the outputs from the detectors. The specific address information is written in a recording area of an optical disk, which area corresponds to VMGI constituting management information (VMG information) for each VOB. Therefore, when playing an audio video stream recorded on the optical disk, quick access can be made to the recording position in the stream where the attribute change occurs.

A method and system for processing video signals is disclosed. The system receives a video signal, a first audio signal containing an annotation and a second audio signal containing environmental sounds corresponding to the video signal. In one embodiment the system generates searchable annotations corresponding to the video and second audio signals via the first audio signal.

A method and system for determining surface topology of a three-dimensional (3D) structure, based on a structured pattern that is projected onto the surface structure, and images of the pattern superposed on the structured surface are analysed to provide surface coordinates of the structure. The pattern comprises a plurality of unique color edges defined between pairs of differently-colored stripes, which substantially overcomes ambiguity problems. In one embodiment, a calibration method is provided enabling the surface coordinates to be obtained from a single image of the structure.