Locking Of Video Or Audio To Reference Timebase Patents (Class 348/512)
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Publication number: 20100225742Abstract: 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).Type: ApplicationFiled: May 17, 2010Publication date: September 9, 2010Inventors: Ian R. SHELTON, Michael B. Costello, Ronnie Israel Dan, Nicholas Thexton, Nicholas Ashton Hall, James Geoffrey Walker, Stuart P. Ashby, Neil Cormican, Rahul Chakkara
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Patent number: 7787578Abstract: A method and an apparatus for synchronizing a data stream are disclosed. The method includes: 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 to generate a comparison result; 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.Type: GrantFiled: July 12, 2006Date of Patent: August 31, 2010Assignee: Realtek Semiconductor Corp.Inventors: Ming-Jane Hsieh, Chia-Wei Yu, Yung-Cheng Hsiung, DeHuei Chen
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Patent number: 7773152Abstract: Measurement of the relative timing between images and associated information, for example video and audio. Image mutual event characteristics are recognized in the images and associated mutual event characteristics are recognized in the associated information. The image mutual events and associated mutual events are compared to determine their occurrences, one relative to the other as a measure of relative timing. Particular operation with audio and video signals is described.Type: GrantFiled: January 16, 2008Date of Patent: August 10, 2010Assignee: Pixel Instruments CorporationInventor: J. Carl Cooper
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Patent number: 7773153Abstract: A frame-based phase-locked display controller used in a display system and method thereof are described. The frame-based phase-locked display controller for displaying a plurality of image frames in a video signal comprises a frame-based phase-locked loop and a synchronization signal generator. The frame-based phase-locked loop receives an oscillating signal and an input vertical synchronous signal to generate an output clock signal by phase-lock loop based on the frames. The synchronization signal generator, coupled to the frame-based phase-locked loop, receives the output clock signal to generate an output horizontal synchronous signal, an output vertical synchronous signal and an output display enable (DE) signal. The frame-based phase-locked loop comprises a first PLL, a frequency synthesizer, a second PLL, a fast phase detector, a phase frequency detector and an active pixel region generator.Type: GrantFiled: December 22, 2005Date of Patent: August 10, 2010Assignee: Mstar Semiconductor, Inc.Inventors: Hsu-lin FanChiang, Jui-hung Hung, Hui-min Tsai
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Patent number: 7765315Abstract: Techniques are described for synchronizing multiple time-based data streams with independent clocks wherein relationships between clock rates of timing devices associated with the time-based data streams are determined, and based on these relationships, times in at least one of the time-based data streams may be translated to times in any of the other time-based data streams despite the data streams having independent clocks.Type: GrantFiled: January 8, 2007Date of Patent: July 27, 2010Assignee: Apple Inc.Inventors: James D. Batson, John S. Bushell, Gregory R. Chapman, Christopher L. Flick
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Publication number: 20100177176Abstract: The present disclosure relates generally to a video frame data receiver that is capable of image acquisition at low frame rates. Such video frame data receivers may be used to capture images from diagnostic tests or assays in which lower frame capture rates are sufficient including, for example, lateral flow test strips.Type: ApplicationFiled: January 15, 2009Publication date: July 15, 2010Applicant: ALVERIX, INC.Inventor: Stephan Hengstler
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Publication number: 20100172591Abstract: An object of the present invention is to provide the capability that image segments constituting an input video is made to correspond to sound segments constituting the input video, if the image segments and the sound segments include an identical object.Type: ApplicationFiled: May 15, 2008Publication date: July 8, 2010Inventor: Masumi Ishikawa
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Patent number: 7742481Abstract: In order to allow the generation of a time stamp in consideration of a frame skip even in the case where the frame skip is generated, a PES generation section of a multiplexer detects the number of skipped frames by analyzing elementary video streams output from a video encoder to determine a PTS on the basis of the time difference between frames calculated on the basis of the number of skipped frames. Then, a frame to which a PTS is to be placed with the above stream analysis is cut out to insert the PTS into a PES header of this frame to be transmitted to the transmission channel.Type: GrantFiled: September 6, 2005Date of Patent: June 22, 2010Assignee: Kabushiki Kaisha ToshibaInventor: Tatsunori Saito
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Patent number: 7738039Abstract: The present invention concerns a method and apparatus for setting a frequency reference in an integrated receiver decoder (IRD). More specifically, the present invention discloses an electrical circuit arrangement in which the voltage controlled crystal oscillator (VCXO) is set to oscillate at the desired frequency prior to the initial use thereof and that frequency is stored in a non-volatile memory unit. Upon initial use, the IRD receives a data signal corresponding to a frequency reference. The IRD uses a threshold value to compare the frequency reference of the incoming data signal with the frequency stored in the non-volatile memory. If the frequencies differ by a predetermined value, the frequency from the incoming data signal is stored in the non-volatile memory and is used to set the VCXO.Type: GrantFiled: February 25, 2005Date of Patent: June 15, 2010Assignee: Thomson LicensingInventors: George Andrew Sirilla, Robert Alan Pitsch
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Publication number: 20100141838Abstract: A system for synchronizing the audio or video and visual components of a presentation through a web-based application. The user listens to an audio or video recording file while viewing a series of visual presentation components, such as individual slides, and clicking on or otherwise indicating when a particular component of the visual presentation should start corresponding with the audio or video recording. The system keeps track of the timing of the user clicks or actions, and saves the presentation as a synchronized audio/video and visual presentation available for viewing and listening.Type: ApplicationFiled: December 8, 2008Publication date: June 10, 2010Inventor: Andrew Peter Steggles
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Patent number: 7729593Abstract: An image and sound output system includes an image and sound data output device, and an image display device that is connected to the image and sound data output device through a transmission path. Further, the image and sound data output device includes an image and sound data separating unit, an image data transmitting unit that transmits the separated image data to the image display device, a sound data output unit that outputs the separated sound data, an image data analyzing unit that analyzes image data transmitted to the image display device by the image data transmitting unit, a sound output adjusting time creating unit, and a sound output synchronization adjusting unit. Furthermore, the image display device includes an image data receiving unit that receives image data transmitted by the image and sound data output device, an image processing unit.Type: GrantFiled: September 13, 2006Date of Patent: June 1, 2010Assignee: Seiko Epson CorporationInventor: Norihiko Yamada
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Publication number: 20100128176Abstract: A television receiver 250 computes a delay time T2a? of a image displayed on the television receiver 250 with respect to an audio signal transmitted from the television receiver 250 to an audio amplifier 310, based on video delay information (T2v) as EDID data, delay information (T4a) transported from a disc recorder 210 and information of a time T2c required until audio data received from the disc recorder 210 is transmitted to an audio amplifier 310. The audio amplifier 310 controls a delay time lasting until the audio responsive to the received audio data is outputted so that the delay time matches the aforementioned delay time T2a?. Thereby, the displayed image in the television receiver 250 and the audio output in the audio amplifier 310 are synchronized.Type: ApplicationFiled: November 7, 2007Publication date: May 27, 2010Applicant: SONY CORPORATIONInventors: Yasuhisa Nakajima, Hidekazu Kikuchi
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Patent number: 7716410Abstract: An information device includes a main processing circuit for executing signal processing related to a main function in the information device, a main microcomputer for controlling the main processing circuit, a receiver circuit for interfacing with the outside of the information device, and an interface microcomputer for controlling the receiver circuit, the interface microcomputer being provided separately from the main microcomputer.Type: GrantFiled: October 23, 2006Date of Patent: May 11, 2010Assignee: Renesas Technology Corp.Inventors: Hideo Nagano, Kikuo Muramatsu, Masayuki Koyama, Tomoko Ando, Motoki Higashida, Takahiko Arakawa, Makoto Hatakenaka
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Patent number: 7710499Abstract: 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.Type: GrantFiled: July 19, 2004Date of Patent: May 4, 2010Inventor: J. Carl Cooper
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Patent number: 7710965Abstract: A decoder includes a transport engine configured to receive programs and extract timing information and timestamps embedded in the programs. An adder is configured to add a set of timing offsets to the sets of timing information to adjust the timing information from a first time basis to a second time basis. Sums of the timing offsets and the timing information are referred to the mapped-timing information. A correction engine is configured to update the timing offsets as timing information is encountered in the programs, and an offset register is configured to: receive the timing offsets, store the timing offsets, and transfer the timing offsets to the adder. The adder is also configured to add the timing offsets to the timestamps to adjust the time basis of the timestamps from the first time basis to the second time basis. A program is decoder configured to receive the adjusted timestamps to decode the programs.Type: GrantFiled: November 23, 2004Date of Patent: May 4, 2010Assignee: Broadlogic Network Technologies Inc.Inventors: Binfan Liu, Thomas Ayers, Weimin Zhang
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Publication number: 20100091189Abstract: An audio signal processing device includes an audio signal acquiring section which acquires an audio signal, an identifying section which determines whether a format of the audio signal is a first format or a second format, and identifies the format of the audio signal and a switching timing of switching between the first format and the second format of the audio signal, a first sound processing section which applies a first sound processing adapted to the first format to the audio signal input from the audio acquiring section to output a first processed audio signal, a second sound processing section which applies a second sound processing adapted to the second format to the audio signal input from the audio acquiring section to output a second processed audio signal, a switching section which switches among the first processed audio signal and the second processed audio signal to output either one of the first and second processed audio signals on the basis of a switching signal, and a switching control secType: ApplicationFiled: October 14, 2009Publication date: April 15, 2010Applicant: Yamaha CorporationInventor: Tatsuya FUKUYAMA
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Digital video processing systems and methods for estimating horizontal sync in digital video signals
Patent number: 7697067Abstract: Video signal processing systems and methods for detecting horizontal synchronization signals within video signals. Digital filtering methods are implemented for processing analog video signals to determine time varying characteristics of video signals to detect the starting and ending positions of horizontal synchronization pulses in a video signal with increased accuracy. In addition, adaptive methods are implemented for dynamically determining various video signal parameters over time, such as blanking level BL, threshold value (slice) level and synchronization level SL using information extracted from digitally filtered video signals.Type: GrantFiled: December 8, 2005Date of Patent: April 13, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Kyoung-mook Lim, Heo-jin Byeon, Hyung-jun Lim, Seh-woong Jeong, Jae-hong Park, Sung-cheol Park -
Patent number: 7692724Abstract: A method and an apparatus to synchronize an audio signal and a video signal. The method includes: displaying video on a screen that corresponds to an audio signal including a high frequency component having a predetermined pattern inserted therein to indicate when a scene change occurs in a video signal, detecting a scene change in the displayed video and detecting the high frequency component having the predetermined pattern in the audio signal, calculating a time difference between a time when the scene change is detected in the displayed video and a time when the high frequency component having the predetermined pattern is detected in the audio signal, and controlling delay times of the audio signal and the video signal according to the calculated time difference. Accordingly, the audio signal and the video signal can be automatically synchronized without performing a separate measuring operation.Type: GrantFiled: May 9, 2005Date of Patent: April 6, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Manish Arora, Serguei Larcycguin
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Publication number: 20100073559Abstract: A verbal description method and system. A computing system broadcasts first audio data and video data associated with the first audio data. The computing system determines that the video data comprises a graphic without a description in the first audio data. The computing system receives audible description data associated with the graphic. The computing system generates second audio data comprising the first audio data and the audible description data. The computing system synchronizes portions of the second audio data with associated portions of the video data. The computing system generates synchronized audio/video data comprising the portions of said second audio data aligned with the associated portions of said video data. The computing system broadcasts the synchronized audio/video data.Type: ApplicationFiled: September 22, 2008Publication date: March 25, 2010Inventors: Sara H. Basson, Brian Reginald Heasman, Dimitri Kanevsky, Edward Emile Kelley, Bhuvana Ramabhadran
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METHOD FOR REDUCING CHANNEL CHANGE TIMES AND SYNCHRONIZING AUDIO/VIDEO CONTENT DURING CHANNEL CHANGE
Publication number: 20100064316Abstract: A digital A/V apparatus provides reduced channel changes times and maintains synchronization between audio and video content during a channel change event.Type: ApplicationFiled: December 13, 2006Publication date: March 11, 2010Inventors: Jiwang Dai, Alan Jay Stein -
Patent number: 7663698Abstract: A genlock device comprises: means (31) for inputting an external reference signal; means (32,33,34,36,39,40,41,42,44) for generating a master reference clock signal synchronized in phase with the external reference signal; and means (37) for storing a genlock state. The genlock state includes, for example, absence of a synchronization signal in the external reference signal. The genlock device can further comprise: means (45) for storing a voltage value determined so that a voltage controlled oscillator (40) oscillates a signal having a frequency higher or lower by a predetermined value than a reference frequency of the voltage controlled oscillator; and means (44) for judging whether a voltage value which controls the voltage controlled oscillator is larger or smaller than the voltage value.Type: GrantFiled: January 17, 2006Date of Patent: February 16, 2010Assignee: Leader Electronics CorporationInventor: Tomomi Hara
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Patent number: 7649569Abstract: System and method for digitally correcting time base errors in video display systems. A preferred embodiment comprises 1) correcting time base errors in a first portion of a horizontal line of video information, wherein the first correcting makes use of an error estimate for the horizontal line of video information and a preceding horizontal line of video information, 2) correcting time base errors in a second portion of a horizontal line of video information, wherein the second correcting makes use of an error estimate for the horizontal line of video information, and 3) repeating the first correcting and the second correcting for remaining horizontal lines of video information in the digitized video signal.Type: GrantFiled: May 24, 2005Date of Patent: January 19, 2010Assignee: Texas Instruments IncorporatedInventors: Peter Chang, Rajitha Padakanti
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Patent number: 7643728Abstract: A video signal recording apparatus with a video and audio memorizing section for temporarily memorizing an inputted video audio signal, a time code generating section for generating a time-code of said video audio signal an auxiliary information memorizing section for temporarily memorizing auxiliary information appended to said video audio signal including said time code generating a regeneration value obtained from a time code to which one frame time is added to said recorded time code when a recording starts and correcting said regeneration value for an amount of delay corresponding to a storage volume temporarily memorized in said auxiliary information (time code, metadata, CUE audio signal, and the like) memorizing section and thus obtaining a corrected time code, and thereafter sequential time codes are generated from said corrected time code though said time code generating section.Type: GrantFiled: January 29, 2004Date of Patent: January 5, 2010Assignee: Panasonic CorporationInventors: Akiyuki Noda, Shinji Takemoto, Hiroyuki Yamashita, Tsuneki Fujimoto
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Patent number: 7636126Abstract: 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.Type: GrantFiled: June 22, 2005Date of Patent: December 22, 2009Assignee: Sony Computer Entertainment Inc.Inventor: Dominic Saul Mallinson
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Patent number: 7633551Abstract: A first frame of data is encoded and a first timestamp associated with the first frame of data is generated. The first timestamp includes complete timing information. The first frame of data and the associated first timestamp is transmitted to a destination. A second frame of data is encoded and a second timestamp associated with the second frame of data is generated. The second timestamp includes a portion of the complete timing information. The second frame of data and the associated second timestamp is then transmitted to the destination. Additional frames of data are encoded and additional timestamps associated with the additional frames of data are generated. The majority of the additional timestamps include a portion of the complete timing information.Type: GrantFiled: April 17, 2006Date of Patent: December 15, 2009Assignee: Microsoft CorporationInventor: Gary J. Sullivan
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Patent number: 7605867Abstract: The present invention provides a method and apparatus for the correction of time base errors in a video signal. The method and apparatus may combine a horizontal scaler and a time base corrector. A time base corrector in accordance with the present invention can function without locking a clock to a horizontal synchronization signal. Furthermore, a method or apparatus in accordance with the present invention may operate as a finite impulse response filter, an infinite impulse response filter, a low pass filter or an adaptive filter.Type: GrantFiled: April 27, 2004Date of Patent: October 20, 2009Assignee: Pixelworks, Inc.Inventor: Neil Woodall
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Publication number: 20090251454Abstract: A timing controller for a display, video, audio, or other device generates and transmits a transmission signal including a strobe signal inserted between data signals including image data and a clock signal inserted following the strobe signal, the strobe signal having a different magnitude from a magnitude of the data signal, and the clock signal having an equal magnitude to the magnitude of the data signal. A column driving circuit receives the transmission signal, extracting the strobe signal from the transmission signal, recovering the clock signal using the extracted strobe signal, and sampling the data signal included in the transmission signal in response to the recovered clock signal. The probability of generating a timing skew error in the time interval between a clock signal and a data signal is minimized. Even though the level of a common component might change, the clock signal can be recovered accurately and the size of the clock recovery circuit can be reduced.Type: ApplicationFiled: March 25, 2009Publication date: October 8, 2009Inventor: Byung-Tak Jang
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Publication number: 20090244375Abstract: In order to further develop a circuit arrangement (100; 102; 104; 106) and a method of locking onto and/or processing data, in particular audio, T[ele]V[ision] and/or video data, by means of at least one phase locked loop (40), wherein phase information is detected by means of at least one phase detector (44), in particular following the arrival of at least one rising edge and/or falling edge of at least one analog input signal (50; 50), at least one increment (24) is determined by means of at least one loop filter (30), to which the output signal (56) which is output by the phase detector (44) is fed, and at least one ramp oscillator (46) is fed the increment (24) which is output by the loop filter (30), such that inter alia the circuit arrangement (100; 102; 104; 106) and the method for operating the same can be readily adapted to various requirements, it is proposed that the phase locked loop (40) is essentially digital, wherein the input signal (50; 50), in particular the phase of the input signal (50; 50Type: ApplicationFiled: December 6, 2004Publication date: October 1, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Ulrich Moehlmann, Andreas Szaj
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Patent number: 7593061Abstract: A method and apparatus for measuring and/or correcting audio/visual synchronization is disclosed. In one embodiment, a method for providing synchronization of a video signal and a corresponding audio signal associated with the audio/visual transmission includes detecting a triggering video event in the video signal and inserting a synchronization signal into the audio signal, where the synchronization signal is correlated to the triggering video event. In another embodiment, a method for measuring and optionally correcting the synchronization of the video signal and the audio signal includes detecting the triggering video event in the video signal, detecting the synchronization signal in the audio signal, and assessing the synchronization of the video signal and the audio signal in accordance with a time offset between the triggering video event and the synchronization signal.Type: GrantFiled: June 22, 2005Date of Patent: September 22, 2009Assignee: Sarnoff CorporationInventor: Hans Andreas Baumgartner
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Patent number: 7589791Abstract: A digital receiver contains a local video clock that controls the video presentation speed and a local audio clock that controls the audio presentation speed separately and independently of the video presentation speed. To control the video presentation speed, a comparator compares a program clock reference in a video packet with a local time. A video clock controller then speeds up or slows down the video clock as needed to be back on schedule. To control the audio presentation speed, a comparator compares a program clock reference in an audio packet with the local time. An audio clock controller then speeds up or slows down the audio clock as needed to be back on schedule.Type: GrantFiled: January 16, 2009Date of Patent: September 15, 2009Assignee: Microsoft CorporationInventors: James A. Baldwin, James A. Lundblad, Louis F. Coffin
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Publication number: 20090207306Abstract: A method and device for synchronizing audio/video signals is provided. A first and a second auxiliary signal are generated, wherein the first and the second auxiliary signals are pulse-shaped, and transmitted to a first and a second rendering device via a first and a second transmission path, respectively. The first audio/video output signal based on the first auxiliary signal and a second audio/video output signal based on the second auxiliary signal are outputted to a user. The user adjusts a delay of the first and/or second transmission path by synchronizing the first audio/video output signal with the second audio/video output signal.Type: ApplicationFiled: January 28, 2009Publication date: August 20, 2009Applicant: SONY CORPORATIONInventor: Wilhelm HAGG
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Patent number: 7577940Abstract: Systems and methods for resolving a partial topology are disclosed. In one embodiment a media engine includes a topology loader module that receives a partial topology from another module associated with the media engine. The topology loader implements logic operations that convert a partial topology into a full topology, which may be returned to the media engine for presentation of the media stream(s) to a user.Type: GrantFiled: March 8, 2004Date of Patent: August 18, 2009Assignee: Microsoft CorporationInventors: Samuel Amin, Brian D. Crites, Kirt A. Debique, Sohail Baig Mohammed, Niranjan S. Nayak, Eric H. Rudolph, Mei L. Wilson
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Patent number: 7570304Abstract: The present invention provides a method for matching the rate of presentation of digital video data at a receiver/client with the rate the server is serving the data without the need of a voltage control oscillator or other hardware. An embodiment of the invention compares the presentation time at the receiver with the server elapsed time estimated from timestamp values on the served data. When the presentation time and the server elapsed time differ by an unacceptably large amount, an adjustment is made to the audio data stream to re-synchronize the presentation time with the elapsed time, which effectively also synchronizes the overall presentation rate with the overall server rate. The video data stream is then synchronized to the adjusted audio stream. The video data stream and audio data stream are converted to analog signals for presentation.Type: GrantFiled: November 21, 2003Date of Patent: August 4, 2009Assignee: Sigma Designs, Inc.Inventors: Vincent Trinh, Michael Ignaszewski, Jacques Mahe
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Publication number: 20090174815Abstract: In one embodiment of the present invention, the synchronisation of data segments is particularly necessary for the use of small screens. A method and a device are disclosed for synchronising content-dependent first data segments of a first data file and content-dependent second data segments of a second data file, the first and second data segments being respectively output in sequence according to their chronological order in such a way that based on a predeterminable assignment rule for the first and second data segments, each second data segment is output together with a corresponding first data segment.Type: ApplicationFiled: March 16, 2006Publication date: July 9, 2009Inventors: Hermann Hellwagner, Jörg Heuer, Andreas Hutter, Michael Ransburg
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Patent number: 7558275Abstract: Data encoded with a video clock is transmitted over a communication link in accordance with a communication reference signal, which in one embodiment is a wireless link. In one embodiment, the video clock is independent from the communication reference signal. The communication reference clock, which may be known to both the transmitter and receiver, is used to determine a frame period. On the receiver-side, the number of video cycles of the video data which are actually received are counted. The video clock may then be regenerated using the determined frame period and counted video clock cycles.Type: GrantFiled: September 13, 2005Date of Patent: July 7, 2009Assignees: Sony Corporation, Sony Electronics, Inc.Inventor: Mark Champion
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Patent number: 7551227Abstract: A signal processor includes a picture input section for receiving a video bit stream, a video decoding section for decoding the video bit stream, a picture display section for outputting decoded data from the video decoding section, a digital image input section for receiving digital image data, a digital image display section for outputting the digital image data, a blending section for generating a picture signal from the digital image display section and the picture display section, an audio input section for receiving the digital audio data and the audio bit stream, an audio decoding section for decoding audio data and the audio bit stream, an audio output section for adding an audio signal to data from the audio decoding section to generate a signal and outputting the generated signal, and a synchronizing section for synchronizing respective outputs of the blending section and the audio output section.Type: GrantFiled: September 15, 2004Date of Patent: June 23, 2009Assignee: Panasonic CorporationInventors: Akifumi Yamana, Ryouji Yamaguchi
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Publication number: 20090128697Abstract: 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.Type: ApplicationFiled: November 10, 2008Publication date: May 21, 2009Inventor: Brian Schoner
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Publication number: 20090122192Abstract: A digital receiver contains a local video clock that controls the video presentation speed and a local audio clock that controls the audio presentation speed separately and independently of the video presentation speed. To control the video presentation speed, a comparator compares a program clock reference in a video packet with a local time. A video clock controller then speeds up or slows down the video clock as needed to be back on schedule. To control the audio presentation speed, a comparator compares a program clock reference in an audio packet with the local time. An audio clock controller then speeds up or slows down the audio clock as needed to be back on schedule.Type: ApplicationFiled: January 16, 2009Publication date: May 14, 2009Applicant: Microsoft CorporationInventors: James A. Baldwin, James A. Lundblad, Louis F. Coffin
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Patent number: 7511764Abstract: The present invention provides a synchronization system comprising a base unit and at least one video camera. The base unit includes a master time-base adapted to set a time period that samples a frame of video data, a memory, and a base unit communications transceiver. The base unit communications transceiver is adapted to transmit a frame synchronization signal to a video camera communications transceiver. The video camera includes an image sensor adapted to store the video data, an exposure control adapted to control an exposure level of the image sensor, and a camera time-base adapted to receive the frame synchronization signal from the video camera communications transceiver. The camera time-base is further adapted to receive the frame synchronization signal, reset its time and initiates its internal timing sequence, transmit signals to the exposure control to control a length of the exposure, and transmit timing signals to the image sensor to read the video data.Type: GrantFiled: July 24, 2002Date of Patent: March 31, 2009Inventors: Alan Neal Cooper, Christopher Michael Fritz, James Walter Exner
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Patent number: 7511763Abstract: A system processes an audio signal and a video signal by using different devices, thereby preventing a so-called lip sync error. The processing time (represented by processing-time information) from the start of reception of a supplied video signal in a video processor apparatus to the start of displaying a video corresponding to the video signal on a display screen of a display device is acquired in an amplifier device from the video processor apparatus through a control signal line. In accordance with the acquired processing time, a delay processor delays processing of an audio signal supplied from the delay processor.Type: GrantFiled: July 13, 2005Date of Patent: March 31, 2009Assignee: Sony CorporationInventor: Takashi Sasaki
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Patent number: 7509019Abstract: A content editing apparatus (10) includes a CPU (12). When combining JPEG data and audio data forming a moving file 1 with JPEG data and audio data forming a moving file 2, the CPU (12) calculates a reproduction frequency of combined audio data based on a sampling frequency of the audio data in the movie file 1 and a sampling frequency of the audio data in the movie file 2. The calculated sampling frequency is a frequency that makes it possible to complete simultaneously the reproduction of the combined JPEG data and the combined audio data. This sampling frequency is written into the combined file.Type: GrantFiled: September 3, 2003Date of Patent: March 24, 2009Assignee: Sanyo Electric Co., Ltd.Inventor: Junya Kaku
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Patent number: 7499104Abstract: Measurement of the relative timing between images and associated information, for example video and audio. Image mutual event characteristics are recognized in the images and associated mutual event characteristics are recognized in the associated information. The image mutual events and associated mutual events are compared to determine their occurrences, one relative to the other as a measure of relative timing. Particular operation with audio and video signals is described.Type: GrantFiled: May 14, 2004Date of Patent: March 3, 2009Assignee: Pixel Instruments CorporationInventor: J. Carl Cooper
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Patent number: 7495705Abstract: A digital receiver contains a local video clock that controls the video presentation speed and a local audio clock that controls the audio presentation speed separately and independently of the video presentation speed. To control the video presentation speed, a comparator compares a program clock reference in a video packet with a local time. A video clock controller then speeds up or slows down the video clock as needed to be back on schedule. To control the audio presentation speed, a comparator compares a program clock reference in an audio packet with the local time. An audio clock controller then speeds up or slows down the audio clock as needed to be back on schedule.Type: GrantFiled: October 12, 2005Date of Patent: February 24, 2009Assignee: Microsoft CorporationInventors: James A Baldwin, James A. Lundblad, Louis F. Coffin
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Publication number: 20090021640Abstract: A signal processing apparatus and method are provided. The signal processing apparatus adjusts the level of a certain signal from among sequentially input signals based on the levels of the signals, and the certain signal is one of signals input prior to the latest signal input to the adjusting unit. Accordingly, a storage cell is shared for lip-sync and AVC, resulting in reduced manufacturing costs, and enhanced stabilization of the signal and the rate of the stabilization of the signal.Type: ApplicationFiled: February 29, 2008Publication date: January 22, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Dae-kyoung NOH
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Patent number: 7474311Abstract: A device for processing video and graphics data includes a component and a main random access memory containing video and graphics data. The component includes a processing unit, and a two-dimensional acceleration unit cooperating with the processing unit and the main random access memory to compose in real time images. The images include at least one video plane and at least one graphics plane, and are stored in the main random access memory. An output interface extracts the image data thus composed from the main random access memory for delivery to an image display.Type: GrantFiled: August 24, 2004Date of Patent: January 6, 2009Assignee: STMicroelectronics SAInventors: Emmanuel Chiaruzzi, Didier Aladenise, Mark Vos, Alastair Walker, Lydie Gillet, Michel Terrat
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Patent number: 7471337Abstract: A method for synchronization of an audio stream and a video stream comprising the steps of (A) determining a first presentation time stamp from the video stream and generating a first handshake signal when the video stream is ready to be transmitted, (B) repeating and dropping one or more audio frames of the audio stream in response to the first handshake signal and a plurality of first predetermined threshold values until a second presentation time stamp from the audio stream matches the first presentation time stamp and generating a second handshake signal when the audio stream is ready to be transmitted and (C) transmitting the video stream and the audio stream in response to the second handshake signal.Type: GrantFiled: June 9, 2004Date of Patent: December 30, 2008Assignee: LSI CorporationInventors: Paul J. Wells, Herve Brelay
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Patent number: 7466362Abstract: 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.Type: GrantFiled: June 17, 2003Date of Patent: December 16, 2008Assignee: Broadcom CorporationInventor: Brian Schoner
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Patent number: RE40664Abstract: A method of encoding a local time base embedded in the compressed data is disclosed. The local time base is encoded in two parts. The first part has a modulo time base that indicates the specific interval in the reference time base and the second part has a time base increment relative to the reference time. Two forms of time base increment is used to allow for the possibility of different encoding order and displaying order. A mechanism for the synchronization of multiple compressed streams with local time base is also described. A time base offset mechanism is also used to allow finer granularity synchronization of the multiple compressed streams.Type: GrantFiled: July 3, 1997Date of Patent: March 17, 2009Assignee: Panasonic CorporationInventors: Thiow Keng Tan, Sheng Mei Shen, Chak Joo Lee
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Patent number: RE40859Abstract: 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. A system and method for displaying an analog source image by a digital display unit. A converter circuit generates a plurality of digital source image elements from an analog source image based upon a sampling clock signal synchronized with a time reference signal associated with the analog source image.Type: GrantFiled: November 20, 2003Date of Patent: July 21, 2009Assignee: Genesis Microchip (Delaware) Inc.Inventor: Alexander J. Eglit
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Patent number: RE41192Abstract: 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.Type: GrantFiled: April 21, 2006Date of Patent: April 6, 2010Assignee: Genesis Microchip Inc.Inventor: Alexander J. Eglit