Class / Patent application number | Description | Number of patent applications / Date published |
386084000 | Synchronization signal modification | 13 |
20080219641 | APPARATUS AND METHOD FOR SYNCHRONIZING A SECONDARY AUDIO TRACK TO THE AUDIO TRACK OF A VIDEO SOURCE - Synchronizes a secondary audio track to a video. Analyzes at least one track of a video using audio frequency analysis or spectrograms, image analysis or text analysis to find distinct audio/image/caption events from which to ensure synchronization of a secondary audio track. For example, commentary that mocks a character may be played immediately after a particular noise in the audio track of a video occurs such as a door slam. Keeping the secondary audio track in synch with the audio track of a video is performed by periodically searching for distinct events in a track of a video and adjusting the timing of the secondary audio track. May utilize a sound card on a computer to both analyze a DVD sound track and play and adjust timing of the secondary audio track to maintain synchronization. Secondary audio tracks may be purchased and/or downloaded and utilized to add humorous external commentary to a DVD for example. | 09-11-2008 |
20080232768 | TECHNIQUES FOR UNIDIRECTIONAL DISABLING OF AUDIO-VIDEO SYNCHRONIZATION - This disclosure describes techniques to allow for unidirectional disabling of audio-video synchronization. In particular, a synchronization command is defined for packet-based network protocols. The synchronization command can disable audio-video synchronization in a sending direction, a receiving direction, or both the sending and receiving direction. In this way, devices are given more control over audio-video synchronization, and can disable such synchronization in a unidirectional manner only, while maintaining synchronization in the opposite direction. | 09-25-2008 |
20080260350 | Audio Video Synchronization Stimulus and Measurement - The present invention uses artificially generated unobtrusive audio and video synchronization events, which are essentially undetectable by normal human viewers, to send audio and video synchronization information by encoding audio and video events in normal program audio and video datastreams. By proper generation of unobtrusive audio and video synchronization events, and by proper use of modern electronics and software to automatically extract such unobtrusive synchronization events from audio and video signals, audio and video synchronization can be nearly continually provided, despite many rapid shifts in cameras and audio sources, without generating obtrusive events that distract the viewer or detract from the actual program material. At the same time, because such unobtrusive synchronization signals can be carried by standard (preexisting) audio and video transmission equipment, the improved unobtrusive synchronization technology of the present invention can be easily and inexpensively implemented because it is backward compatible with the large base of existing equipment. | 10-23-2008 |
20080279531 | Transmitting signals to cause replays to be recorded at a plurality of receivers - A video stream may include portions that are stored while other portions are being displayed. In one embodiment, a portion of the video stream may be stored in digital storage media at one instance while in the next instance another portion of the stream is being read out of the storage media. | 11-13-2008 |
20090148131 | Systems and Methods of Reducing Media Stream Delay Through Independent Decoder Clocks - In one embodiment, a method of reducing video delay in a program stream comprises: setting an audio reference clock to an initial value based on a presentation timestamp for a frame that is the first decodable frame in the audio stream; setting a video reference clock to an initial value based on a presentation timestamp for a frame that is the first decodable frame in the video stream; starting audio and video reference clocks responsive to the later of a minimum buffer fill delay and receipt of a frame that is the first entire decodable frame in the video stream; decoding the audio stream in accordance with the audio reference clock; and decoding the video stream in accordance with the video reference clock. | 06-11-2009 |
20090169176 | Synchronizing audio and video frames - Synchronization problems between audio and video information may be reduced by determining whether a certain predetermined time has elapsed since the previous frame of video has been displayed. Thus, for example, where the audio presentation time stamp and video presentation time stamp are offset so that audio information may be presented before video information, the next video frame in the queue may be displayed immediately after the passage of a predetermined time. Then, audio/video synchronization may be achieved after passage of an amount of time determined by the setting of the predetermined elapsed time between frames. The longer the predetermined time between frames, the more slowly the video frames are displayed, but the faster audio and video synchronization is achieved. | 07-02-2009 |
20090180755 | Video/Audio Reproducing Apparatus - A video/audio reproducing apparatus, to be connected via a first apparatus with a second apparatus, comprises: a first receiving portion, which is configured to receive video data, audio data, and first reproduction synchronization information for reproduction synchronization between the video data and the audio data; a second receiving portion, which is configured to receive second reproduction synchronization information for reproduction synchronization between the video data and the audio data from the first apparatus; and a controlling portion, which is configured to reproduce the video data and the audio data received by the first receiving portion, upon basis of the first reproduction synchronization information and the second reproduction synchronization information, which are received by the first receiving portion and the second receiving portion. | 07-16-2009 |
20090202223 | Information processing device and method, recording medium, and program - The present invention relates to an information processing apparatus and method, a recording medium, and a program by which a content viewed at the same time by speakers at remote places and images and sound of the speakers are recorded in such a state that the images and sound of the speakers can be reproduced. At step S | 08-13-2009 |
20090214178 | Reproduction Apparatus, Video Decoding Apparatus, and Synchronized Reproduction Method - In a random access reproduction of a stream in which video and audio are multiplexed, it is difficult to reproduce the video and audio in synchronization. A demultiplexer ( | 08-27-2009 |
20100054696 | METHOD AND SYSTEM FOR SUBFRAME ACCURATE SYNCHRONIZATION - A method, apparatus and system for synchronizing between two recording modes includes identifying a common event in the two recording modes. The event in time is recognized for a higher accuracy mode of the two modes. The event is predicted in a lower accuracy mode of the two modes by determining a time when the event occurred between frames in the lower accuracy mode. The event in the higher accuracy mode is synchronized to the lower accuracy mode to provide sub-frame accuracy alignment between the two modes. In one embodiment of the invention, the common event includes the closing of a clap slate, and the two modes include audio and video recording modes. | 03-04-2010 |
20100189414 | Reproducing apparatus, method for controlling reproducing apparatus, content recording medium, and non-transitory recording medium storing control program - A video disk player includes (i) a disk reading section for reading out video data, a program, synchronization timing information from an optical disk; (ii) a clock for generating a clock signal; (iii) a decoder for converting, in accordance with the clock signal, the video data into decompressed video data for reproduction output; (iv) a video reproducing section including a synchronization control section for transmitting, in accordance with the clock signal, a synchronization control signal to the program executing section at a timing specified by a field timing contained in the synchronization timing information, and (v) a program executing section for executing a program in accordance with the synchronization control signal received from the synchronization control section. This makes it possible to efficiently execute the program in synchronization with reproduction of AV data or the like. | 07-29-2010 |
20100195977 | Constructing Video Frames And Synchronizing Audio Data In A Media Player From Data Received Via A Plurality Of Diverse Protocol Stack Paths - Video frames from a sequence of video frames and corresponding audio are received and processed by a media player. A first portion of the sequence depends on fewer reference frames then a second portion of the sequence. The number of reference frames per frame is limited. The first and second portions of the sequence are treated differently. The first portion is received at a lower data rate, with greater security and processed with a more robust protocol stack than the second portion. The first and second portions may be stored in a single queue and/or separate queues. The first portion of frame data is utilized to compensate for lost frames by repeating and/or interpolating video frames. The media player constructs a local video frame and synchronizes corresponding audio content with it. The received, repeated and/or interpolated video frames are assembled into display order and decoded. | 08-05-2010 |
20100226624 | INFORMATION PROCESSING APPARATUS, PLAYBACK DEVICE, RECORDING MEDIUM, AND INFORMATION GENERATION METHOD - A detecting section in an information processing apparatus is configured to detect an event sound from audio, the audio having been recorded when video was shot. The information processing apparatus also includes a calculating section configured to determine an event playback time at which an image associated with the event sound is played back in a video playback time sequence, the video playback time sequence corresponding to a playback speed lower than a shooting speed of the video and a determining section configured to determine a playback start time of the event sound during the video playback time sequence in accordance with the event playback time. | 09-09-2010 |