Abstract: Devices, methods, and computer-readable media having program instructions for performing functions are described for synchronizing audio and video components of a media program. If audio and video components of an audiovisual program and routed through different processing devices, such as a home theater system, the viewer of the audiovisual program may perceive a synchronization mismatch between the audio and video components. As described herein, the viewer is provided with the ability to adjust a delay of one of the components relative to the other component, such that synchronization is achieved. In some variations, a user interface is provided to give the viewer feedback concerning the relative delay between one component and the other.

Abstract: A device is operative to send packets in a packet communication network having at least two stations. According to an exemplary embodiment, the device operates by: extracting image pips on the basis of a synchronization signal; initializing a first counter on the basis of the the image pips; initializing a second counter according to zero-crossings of the first counter; sampling the second counter every period Tsmp, where Tsmp emanates from a time base synchronized on all the stations of the network; sending packets containing the samples of the second counter in the network; receiving at least one phase deviation value ?? to be applied; and sending the at least one phase deviation value ?? in the network. The present invention also pertains to a device operative to receive packets in a packet communication network having at least two stations.

Abstract: An invention for measuring, maintaining and correcting synchronization between signals which suffer varying relative delays during transmission and/or storage is shown. The preferred embodiment of the invention finds particular use in measuring the relative delay between multiple audio signals and an associated video signal of a television type program which is compressed via MPEG or other compression for a transmission and/or storage system. The invention marks the video signal at a time when a particular event in the associated audio occurs. The mark is carried with the video throughout the video processing. After processing the same event in the audio is again identified, the mark in the video identified, the two being compared to determine the timing difference therebetween.

Abstract: A data processing method for a high density multimedia interface (HDMI) includes receiving video and audio data, sampling the receiving data according to a sample clock, outputting a sampling pattern according to the sampled receiving data and the sample clock, comparing the sampling pattern with a plurality of predetermined patterns, deciding the timing sequence of the receiving data when the sampling pattern and one of the plurality of predetermined patterns are the same, and outputting the video and audio data according to the correct timing sequence.

Abstract: A method for determining transfer rate comprising selecting a first transfer rate of a plurality of transfer rates, transmitting a message at the first transfer rate over a Consumer Electronics Control (CEC) line of a High Definition Multimedia Interface (HDMI) network, determining whether an acknowledgment to the message having been transmitted at the first transfer rate is received, storing, in the event the acknowledgment to the message having been transmitted at the first transfer rate is received, the first transfer rate and storing, in the event no acknowledgment is received, a default transfer rate of the plurality of transfer rates.

Abstract: In television type systems having separate data, audio and video portions, it is desirable to maintain or correct the relative timing of the signals by delaying the lesser delayed one(s) to match the delay of the more delayed one(s). A method and apparatus are described where events leading to significant changes in delay of a first, more delayed signal are recognized before that delay change appears in that first delayed signal, for one example by recognizing delay changes made before or at the input to, or within the system. Information about the significant delay change is communicated to a second signal's compensating delay before hand to enable faster and more accurate tracking of the second signal's delay to the first signal's delay.

Abstract: The trend toward moving to digital content is progressing and expanding every day. With that trend comes the availability of a multitude of content from many content sources. There is a need for this content to be distributed to multiple destinations, and there is a further need to have the content synchronized among those multiple destinations. Embodiments described herein detail a method of synchronizing this content in an asynchronous environment, such as a powerline network, including using a PHY timing flag that is used to compensate for PHY-to-channel-to-PHY delays.

Abstract: A data recovery device and a method thereof for processing a television signal having a plurality of horizontal scan signals are disclosed. The data recovery device includes a reference level processing unit and a data processing circuit. The method for data recovery is by means of the reference level processing unit to generate a plurality of reference levels according to a reference component of each of the horizontal scan signals. And the data processing circuit is used to process the N+1th horizontal scan signal in accordance with the Nth reference level.

Abstract: According to one of embodiments, a method and apparatus for reproducing video and audio changes a playback speed for video and a playback speed for audio independently of each other. To provide an apparatus and method for controlling the playback speeds shortly before a period in which the video and audio should better be played back at a normal-speed, thereby to reduce the strange feeling the user may have as the playback changes from the high-speed playback to the normal-speed playback, a video signal and an audio signal are first isolated from a content and then demodulated. A playback speed is set for the video signal modulated, and a playback speed is set for the audio signal modulated. The video signal and the audio signal, each set to a playback speed, are output.

Abstract: A content reproducing system having a first device and a second device connected to each other through a transmission path for transmitting content data is provided. The first device includes an outputting unit and an output controlling unit configured to output the content data output from the outputting unit a transmission rate. The second device includes an inputting unit, a storage unit configured to store the content data input by the inputting unit, a transmission rate controlling unit configured to control the transmission rate in accordance with the amount of content data stored in the storage unit, a reproduction clock generating units configured to generate a reproduction clock for reproducing the content data, and a reproducing units configured to read out the content data from the storage unit on the basis of the reproduction clock generated by the reproduction clock generating unit and reproduce the content data.

Abstract: Systems and methods are operable to correct synchronization between a video stream and an audio stream presented to a user. An exemplary embodiment receives a synchronization correction instruction, wherein the synchronization correction is configured to be initiated by the user; and incrementally adjusts one of the video stream and the audio stream by a synchronization correction, wherein the synchronization correction advances or retards presentation of at least one of the video stream and the audio stream by a predefined duration.

Abstract: A display device including an input portion into which a reference signal with a predetermined frequency is input, a transmitter for transmitting a synchronization signal which is synchronized with display of video frame image, a determination portion for determining an intermittent transmission cycle including a first period in which the synchronization signal is transmitted and a second period without transmission of the synchronization signal on the basis of the reference signal, and a transmission controller for controlling the transmitter so that the synchronization signal is transmitted in the first period except for the second period. The determination portion adjusts a timing of the first period to avoid interference between the synchronization signals.

Abstract: A system and method for characterizing the relative offset in time between audio and video signals and enables the receiver of the audio and video signals to resynchronize the audio and video signals. Signal characterization data is dynamically captured and encoded into frames of video and audio data that is output by a television origination facility. The signal characterization data is extracted by the receiver and signal characterization data is captured for the received frames. The extracted signal characterization data is compared with the captured signal characterization data to compute the relative offset in time between the video and one or more audio signals for a frame. The receiver may then resynchronize the video and audio signals using the computed relative offset.

Abstract: Devices and methods are disclosed for managing an output of an output stream. One embodiment relates to a method of tracking an output of an A/V decoder. In this embodiment, indication of an output stream time reference and a location of at least one output sample are received. The received time reference is compared to the output sample and the output sample rate of the A/V decoder is adjusted.

Abstract: Provided is a display apparatus which can avoid the load increase and display rapidly the video of the selected channel. The display apparatus includes a synchronizing unit. The synchronizing unit which adjusts a timing, in which a video is displayed based on a predetermined reference frame received and decoded at first after channel selection, toward shifting earlier than a time originally displaying the video based on a time information attached to the reference frame.

Abstract: A method and an apparatus for synchronizing a data stream are disclosed. The method comprises: decoding the data stream to generate a decoded data stream and program clock references; generating a local clock reference; generating a simulated clock reference according to the program clock references and the local clock reference; comparing the local clock reference with the simulated clock reference; adjusting a processing timing of the decoded data stream according to the comparison result; and processing the decoded data stream according to the processing timing.

Abstract: Problem. Current systems for generating synchronized video sequences from multiple video sources are too complex, too restrictive, too cumbersome or too imprecise. There are also few practical ways of faithfully transmitting highly synchronized multivideo between video sources and video sinks. Solution. A system and a method for ensuring precise synchronization of high speed stereovision or multivision systems is disclosed. This method involves the use of matched video sources such as cameras or image sensors which are subjected to a common clock as well as identical operating conditions thereby guaranteeing an identical internal state and synchronized output timing behaviour without relying on the provision of a frame reset pulse or a line reset pulse generated by any one of the video sources in order to guarantee synchronization. This avoids the delays associated with the transmission of such pulses and hence allows much higher frames rates to be achieved.

Abstract: A method for urging the start of viewing an interleaved audio video stream is disclosed. The method includes repositioning audio and video access units in the interleaved audio video stream. A computer program product and a data processing system are also disclosed.

Abstract: There is provided an amplifier that measures a display delay time caused until a video is displayed actually after a video signal is generated, and sets automatically a delay time of an audio signal such that an audio synchronizes with this display. Test video data is stored in a memory 11. This test video data is video data that generates a clear change in luminance in such a manner that a screen is changed suddenly from deep black to pure white. This test video is output to a video display device 2 such as PDP, for example, and a delay time generated until the test video is displayed actually after this test video is output is measured. Since the luminance of the screen is changed suddenly when the test video is displayed actually, this change can be sensed by an optical sensor 20. The audio signal is delayed by setting this delay time in an audio signal processing portion 13, so that the video can synchronize with the audio.

Abstract: The present invention describes a method for synchronizing data of an interactive content with the audio and/or video of TV broadcasting. Especially, but without limitation, the method of the present invention is for synchronizing subtitles for digital TV applications.

Abstract: An information device packaged in one package includes a main function unit and an interface function unit. The main function unit includes a main processing circuit for executing signal processing related to a main function in the information device and a first microcomputer for controlling the main processing circuit by executing a first firmware program. The interface function unit includes an interface function unit including a first interface circuit for receiving data from an exterior device located outside of the information device to provide to the main function unit, a second interface circuit for performing an authentication operation with the exterior device, a second microcomputer for controlling the first interface circuit, and a memory for storing a second firmware program for controlling the first interface circuit.

Abstract: Provided is an audio video synchronizing apparatus and method in a video processing equipment. It is detected whether or not an external device connected to an audio/video output port of the video processing equipment is an audio system, and an audio signal synchronized with a video signal outputted to a display device of the video processing equipment is provided to the audio system through an audio output port when the detection result shows that the external device is the audio system. Accordingly, a vide signal on a screen is synchronized with an audio signal outputted from the audio system.

Abstract: A video signal receiver including a display synchronizing signal generation device and control method are disclosed. The video signal receiver includes: a video processor converting an input analog video signal into a digital signal; a display processor scaling the video signal converted at the video processor with an output resolution; a displaying unit displaying the video signal scaled by the display processor; a detecting unit detecting whether an input vertical synchronization signal (In V-sync) and an output vertical synchronization signal of the analog video signal match; a PLL (Phase Locked Loop) adjusting a pixel clock according to a detection result of the detecting unit; and a timing generating unit generating an output horizontal synchronization signal and the output vertical synchronization signal by use of the pixel clock adjusted by the PLL, and providing the generated output horizontal and output vertical synchronization signals to the display processor and the detecting unit.

Abstract: An apparatus and method thereof determines a title of a recorded program. After a desired video content that is transmitted through a channel has been recorded upon user's request of timer recording, it is checked if more than one program is scheduled for broadcast on that channel during the preset timer recording interval based on broadcast program time information obtained from the channel. If it is determined that more than one programs is scheduled, the title of the recorded desired video content is determined on the basis of time length, data size, and/or minimum ratio.

Abstract: An apparatus having a first circuit, a second circuit and a third circuit. The first circuit may be configured to (i) demultiplex a multimedia stream having one or more video and audio streams and (ii) generate one or more video signals and one or more audio data signals in response to demultiplexing the multimedia stream. The multimedia stream may be independent of embedded time stamps. The second circuit may be configured to (i) decode the one or more video data signals and the one or more audio data signals and (ii) generate a video current time signal for each decoded video signal and an audio current time signal for each decoded audio signal. The third circuit may be configured to synchronize the playback of each decoded audio signal and each decoded video signal with the video current time signal and the audio current time signal.

Abstract: Embodiments of the disclosed invention include an apparatus, method, and computer program product for providing a video source with a secondary audio source. For example, in one embodiment, a content provider receives a broadcast signal that includes a video component and an audio component from a content producer. The content provider receives a second audio component that provides audio corresponding to the video component of the broadcast signal. The second audio component is received from a second source, such as, but not limited to, a radio broadcast and/or an internet source. The content producer transmits the video component and the second audio component to a consumer device.

Abstract: A method and apparatus are disclosed for providing a video signature representative of a content of a video signal. A method and apparatus are further disclosed for providing an audio signature representative of a content of an audio signal. A method and apparatus for detecting lip sync are further disclosed and take advantage of the method and apparatus disclosed for providing a video signature and an audio signature.

Abstract: An apparatus for generating a control signal for a film event system is described for synchronizing film events with an image reproduction, wherein a film comprises film information applied in a time sequence, and the apparatus comprises a means for storing the film information, wherein a time scale is associated to the stored film information, a means for receiving a section read from the film, a means for comparing the read section to the stored film information and a means for determining the control signal based on the comparison and the time scale.

Abstract: A method and apparatus for synchronizing audio and video portions of a media program signal is disclosed. The method comprises the steps of detecting an audio event in the audio portion of the media program signal, measuring the timing interval from the audio event to a subsequent video synchronization pulse in the video portion of the media program signal, and storing the timing interval in a third portion of the media program signal. The apparatus comprises a voice detector for detecting an audio event in the audio portion of the media program signal, a timer for measuring the timing interval from the audio event to a subsequent video synchronization pulse in the video portion of the media program signal, and a processor for storing the timing interval in a third portion of the media program signal.

Abstract: A method and apparatus for synchronizing audio and video portions of a media program signal is disclosed. In a transmitting embodiment, the method comprises the steps of identifying a video event according to an video event discriminant in the video signal, and inserting a timing signal into the audio signal, and the apparatus comprises a video analysis module for identifying a video event according to an video event discriminant in the video signal, a timing signal generator for generating a timing signal, and a mixer for inserting the timing signal into the audio signal.

Abstract: Provided is an apparatus for reproducing an adaptive motion effect, including: a media processing module to separate, from multimedia content comprising information associated with a motion effect applied to each scene of content, information associated with the motion effect; a motion effect adaptation module to convert information associated with the motion effect to adaptive control information acceptable by a motion apparatus reproducing the motion effect, based on a metadata schema indicating information associated with a capability of the motion apparatus; and an apparatus control module to generate a signal for controlling the motion apparatus based on the adaptive control information.

Abstract: An audio/video system comprises an audio signal processing path having an audio path delay and a video signal processing path having a video path delay. The audio path delay may be different from the video path delay. The audio path delay and/or the video path delay may change, for example because of replacement of a component within the audio signal processing path or the video signal processing path. Delay matching (synchronization) in the audio/video system comprises adjusting the audio path delay to be substantially equal to the video path delay. Matching the audio path delay to the video path delay generally includes adding delay to the signal processing path with the lesser delay.

Abstract: An audio and video communications apparatus eliminates a system clock frequency difference, freeing a user from unconformable feeling of audio and video. The audio and video communications apparatus includes: a transmitting unit and a receiving unit (106/108) transmitting and receiving audio and video via a network; a PTS correction timing determining unit (111) determining timing to update a correction amount of a PTS according to information of the audio or the video to be transmitted and received, the PTS being given to the received audio or the received video; a PTS correcting unit (112) correcting the PTS by updating the correction amount at the timing determined by the PTS correction timing determining unit (111); and an audio and video output unit (113) outputting the received audio and the received video corresponding to the corrected PTS found at a current time indicated by the audio and video communications apparatus.

Abstract: This invention relates to a device and a method of generating a first and a second fingerprint (102,104) usable for synchronisation of at least two signals (101,103) and corresponding method and device for synchronising two or more signals. A fingerprint pair is generated on the basis of a segment of a first signal e.g. an audio signal and of a segment of a second signal e.g. a video signal at each synchronisation time point. The generated fingerprint pair(s) are stored in a database (203) and communicated or distributed to a synchronisation device (303). During synchronisation, fingerprint(s) of the audio signal and fingerprint(s) of the video signal to be synchronised are generated and matched against fingerprints in the database. When a match is found, the fingerprints also determine the synchronisation time point, which is used to synchronise the two signals. In this way, a simple, reliable and efficient way of synchronising at least two signals is obtained.

Abstract: A display apparatus including an image receiver receiving an image signal and a display displaying the image signal. The display apparatus includes a user selector, an image signal processor to process at least one image delay decrease mode to decrease a processing time of the image signal and a controller to control the image signal processor to process the image signal according to the selected image delay decrease mode if an image delay decrease mode is selected through the user selector.

Abstract: A synchronization control circuit is provided with a first sampling means for sampling the envelope signal of the modulation signal at a first sampling timing, a second sampling means for sampling the envelope signal at a second sampling timing, a third sampling means for sampling the envelope signal at a third sampling timing, a phase error calculation means for calculating a phase error value indicating the amount of synchronization deviation between the modulation signal and the reference clock signal using the outputs of the first, second, and third sampling means, a delay control means for generating a delay control signal on the basis of the phase error value, and a delay generation means for generating the first, second, and third sampling timing by delaying the reference clock signal based on the delay control signal. Thereby, a synchronization control circuit that can reduce the circuit size required for obtaining the synchronization with relative to the Early/Late system can be provided.

Abstract: In a method and arrangement for determining time skew for a media sequence being conveyed from a sending party to a receiving party over a transmission path, first and second artificial media sequences (310; 306) are generated and added to individual captured media sequences (308; 304), resulting in a first and a second modified media sequence (308/310; 304/306), before being conveyed. At the receiving party, the modified media sequences (308?/310?; 304?306?) are presented and registered, and the artificial media sequences (310?; 306?) are extracted. The time difference between the extracted artificial media sequences (306?; 310?) is calculated as the time skew. Performing time skew determination by adding artificial media sequences to captured media sequences, extracting the artificial media sequences at the receiving party and comparing them can achieve an accurate determination including delays in the capturing and presentation devices.

Abstract: A method for determining transfer rate comprising selecting a first transfer rate of a plurality of transfer rates, transmitting a message at the first transfer rate over a Consumer Electronics Control (CEC) line of a High Definition Multimedia Interface (HDMI) network, determining whether an acknowledgment to the message having been transmitted at the first transfer rate is received, storing, in the event the acknowledgment to the message having been transmitted at the first transfer rate is received, the first transfer rate and storing, in the event no acknowledgment is received, a default transfer rate of the plurality of transfer rates.

Abstract: A video data generation apparatus generates video data based on audio data and frame image data, which are generated independently of each other. The video data generation apparatus sequentially inputs the audio data at fixed intervals, while sequentially inputting the frame image data in time series at irregular intervals. Simultaneously with input of one frame of frame image data, the video data generation apparatus starts a data acquisition process to obtain next one frame of frame image data. The video data generation apparatus stores audio data, which have been input in a period between a start of the data acquisition process by the data acquirer and input of one frame of frame image data by the data acquisition process, in combination with the frame image data of one frame obtained by the data acquisition process, as one audio image complex data, and generates the video data based on multiple stored audio image complex data.

Abstract: A scanning projector includes a mirror that scans in two dimensions, at least one of which is sinusoidal. A digital phase lock loop locks to the sinusoidal movement of the mirror. A free-running pixel clock is provided. An interpolation component interpolates pixel intensity data from adjacent pixels based on the position of the mirror when a pixel clock arrives.

Abstract: Systems and methods are disclosed for recovering a clock or time reference for A/V systems. One method comprises receiving at least one input time reference generated using a first clock and generating, using a second clock asynchronous to the first clock, at least one time reference value representative of the at least one input time reference. The method further comprises outputting the generated time reference value used by the A/V system.

Abstract: In a signal transmitter and a signal receiver, a multiplexing part multiplexes a video signal and a time-base-compressed audio signal on the basis of a multiplexing control signal to transmit the multiplexed signal through a data line in the signal transmitter. Further, a demultiplexing part demultiplexes a video/audio multiplexed signal received through the data line into the original video signal and audio signal by a demultiplexing control signal in the signal receiver. According to the so-configured signal transmitter and signal receiver, it is possible to realize a signal transmission system compliant with the DVI standard, in which the audio signal as well as the video signal can be transmitted.

Abstract: A method and an apparatus for synchronizing a data stream are disclosed. The method comprises: decoding the data stream to generate a decoded data stream and program clock references; generating a local clock reference; generating a simulated clock reference according to the program clock references and the local clock reference; comparing the local clock reference with the simulated clock reference; adjusting a processing timing of the decoded data stream according to the comparison result; and processing the decoded data stream according to the processing timing.

Abstract: Methods for synchronized media playback between a number of electronic media devices wherein the electronic media devices are in electronic communication are presented, the methods including: creating a media play list on an originating media device, selecting a member media device for sharing the media play list; negotiating the media play list by the at member media device wherein the negotiating the media play list includes, searching the member media device for at least one matching candidate, wherein the searching is enabled by comparing a number of candidate indicia with a number of matching candidate indicia, selecting one of the at least one matching candidates for inclusion on a member media play list, conforming the at least one matching candidate, and populating the member media play list with the at least one matching candidate; and playing the media play list and the member media play list.

Abstract: Some embodiments of the invention provide a method for synchronizing an audio stream with a video stream. This method involves searching in the audio stream for audio data having values that match a distinct set of audio data values and synchronizing the audio stream with the video stream based on the search. In some embodiments, the distinct set of audio data values is defined by a predetermined distinct tone. In other embodiments, the distinct set of audio data values is defined by audio data contained in the video stream.

Abstract: A digital signal receiving system is provided for establishing high-speed clock resynchronization even if abnormality such as a poor radio wave receiving condition takes place. The system is constructed such that recipient STC data and PCR data are acquired in response to detection of a variation in frequency of a clock signal, and these data are stored as variation information data. The receiver 10 sets the PCR data in the R_STC counter 142, and sends the variation information data to the host device 20. The host device 20, in turn, sets a computation result obtained based on host STC data and the variation information data in the H_STC counter 242.

Abstract: In synchronization of a conventional AV system, when a stream as the master stops, a system clock cannot be corrected for synchronization. Since the correction is consistently performed even when an error is small, overhead of correction is large. On the other hand, when an error is large, sharp correction causes a feeling that something wrong. In the present invention, when the stream as the master stops, previously registering the degree of priority regarding the master, consideration of a corrected period or a previous error for the system clock, or transmitting a stream containing information regarding the master can allow for other process to serves as the master. Accordingly, it is possible to provide a method for synchronization with maintaining correction of the system clock. When a corrected error is large, gradual correction or reference can provide a system with normal feeling.

Abstract: A playback system that utilizes a serial link for transmitting video and audio data from a host to a playback device includes a host and a playback device. The host is utilized to generating graphic packets, video packets, and audio packets according to input data, and to generating control packets according to a host clock. Then, the host transmits the packets through a serial port, wherein the graphic packets are transmitted only when the host receives a request. The playback device is coupled to the host via the serial port, and is implemented to decoding the received packets from the serial port to generate decoded data, and to generate a playback clock according to the control packets. Then the playback device performs a playback operation according to the decoded data and the playback clock.

Abstract: An interactive method includes receiving background video including a multiplicity of video frames, at least one of the multiplicity of video frames include a plurality of sub-pictures, each of the plurality of sub-pictures representing an alternative background (1200), and switching between a first sub-picture of the plurality of sub-pictures and a second sub-picture of the plurality of sub-pictures (1210).

Abstract: A clock recovery circuit in a digital display unit for recovering a time reference signal associated with analog display data. The clock recovery circuit includes a phase-locked loop (PLL) implemented in digital domain and an analog filter to eliminate any undesirable frequencies from the output signal of the PLL. The PLL includes independent control loops to track long term frequency drifts of the time reference signal and the transient phase differences respectively. By providing such independent control loops, the generated clock can be better synchronized with the time reference signal. Scaling a source image formed of a number of source image elements to provide a destination image formed of a number of destination image elements using a line buffer and no frame buffer.