Of Sync Signal Patents (Class 348/495)
  • Patent number: 9473677
    Abstract: A method for synchronization of audio/video (AV) media files includes: writing respectively AV real-time transport protocol (RTP) packets and AV real-time transport control protocol (RTCP) packets into AV buffers; obtaining respectively timestamps in first ones of AV RTCP packets to serve as absolute start times of first ones of the AV RTP packets, and AV timestamp differences between the timestamps of adjacent ones of the AV RTP packets; generating respectively playback timestamps of the AV RTP packets according to the AV timestamp differences in combination with the absolute start times; and writing the AV RTP packets in combination with the playback timestamps of the AV RTP packets into a media file.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: October 18, 2016
    Assignee: Wistron Corp.
    Inventor: Fei Ren
  • Publication number: 20150116594
    Abstract: This invention discloses circuits and methods for generating a pixel clock. The circuits utilize an image signal of a first format to generate a pixel clock, which can be utilized to generate an image signal of a second format. The circuits include a reference clock generation circuit, an image processing circuit, and a clock adjustment circuit. The reference clock generation circuit generates a reference clock. The image processing circuit processes the image signal of the first format to generate a control signal. The clock adjustment circuit, which is coupled to the reference clock generation circuit and the image signal processing circuit, generates the pixel clock according to the reference clock and the control signal. The control signal is substantially a periodic signal, whose frequency is proportional to the frequency of a synchronization signal of the image signal of the second format.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 30, 2015
    Inventors: BING-JUO CHUANG, FENG-CHENG CHANG
  • Patent number: 9021536
    Abstract: A system and process is provided in which original video or dialog content is securely received from the content owner. Subtitle language data is derived, translated, stored and served on a separate database for synchronous playback with the content in video streaming, downloading or online TV following the activation of an option by the end user through a media player.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: April 28, 2015
    Assignee: Stream Translations, Ltd.
    Inventors: Richard E. Greenberg, Bente Cecilie Ottersen, Randi Næs
  • Patent number: 9013631
    Abstract: Methods and apparatus for processing and displaying caption information associated with a video program are provided. The caption information is extracted from a video signal and different captions are rendered in sequence for different segments of the video program. A plurality of the different captions is blended in a form for simultaneous display superimposed on video images during one of the different segments of the video program. The different captions may be the latest caption corresponding to the current segment of video and a previous caption corresponding to a previous video segment. These different captions can be displayed such that they overlie each other and such that their opacity is different. In this manner, a viewer is able to have a prolonged period of time to read captions and can readily distinguish the current caption from the previous caption.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: April 21, 2015
    Assignee: Google Technology Holdings LLC
    Inventors: Denis Sergeyevich Suvorov, Anton S. Korchazhinskiy, Irina Spirina
  • Patent number: 8913189
    Abstract: Audio data and video data are processed to determine one or more audible events and visual events, respectively. Contemporaneous presentation of the video data with audio data may be synchronized based at least in part on the audible events and the visual events. Audio processing functions, such as filtering, may be initiated for audio data based at least in part on the visual events.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: December 16, 2014
    Assignee: Amazon Technologies, Inc.
    Inventors: Richard William Mincher, Todd Christopher Mason
  • Patent number: 8896705
    Abstract: A measuring device for measuring a response speed of a display panel is provided. The measuring device includes a microcontroller and at least one photo sensor. The microcontroller provides a control command, according to which a display controller of the display panel provides test pattern to the display panel. The photo sensor senses a test frame displayed corresponding to the test pattern by the display panel, and provides a corresponding sensing signal associated with brightness and a response signal. According to the response signal, the response speed of the display panel is calculated.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: November 25, 2014
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chih-Chiang Chiu, Tien-Hua Yu, Wen-Cheng Wu
  • Patent number: 8891017
    Abstract: A video input section acquires a video signal formed of a plurality of frames. A frame separator separates the video signal acquired by the video input section on a frame basis and distributes the separated video signals. A plurality of parallel processors perform video processing in parallel on the separated video signals corresponding to the frames separated and distributed by the frame separator. A frame combiner combines the separated video signals on which the plurality of parallel processors have performed the video processing.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: November 18, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Kazuyoshi Kegasawa
  • Patent number: 8866968
    Abstract: Provided is a video processing device capable of displaying an easily viewable video utilizing a broader area in a display. A video processing unit that is included in the video processing device and processes an input video includes a first memory that stores the input video, a second memory that stores the input video, a compression/expansion control unit that compresses and/or expands a first area of the input video stored in the first memory and compresses and/or expands a second area of the input video stored in the second memory, and an image composing unit that generates an output video in which a video of the first area compressed and/or expanded by the compression/expansion control unit and a video of the second area compressed and/or expanded by the compression/expansion control unit are horizontally aligned.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: October 21, 2014
    Assignee: Panasonic Corporation
    Inventor: Takashi Kuwabara
  • Patent number: 8587721
    Abstract: A method and circuitry for processing a video signal corresponding to a source synchronous video broadcast which corresponds to a selected channel which is one of a plurality of channels of a broadcast spectrum. In one aspect, the method includes generating digitized data of the video signal, which corresponds to the source synchronous video broadcast, using a local clock signal having a frequency which is different from the frequency of the source clock of the video broadcast; generating video data using the digitized data of the video signal; generating formatted video data blocks by arranging the video data into one or more lines or frames of video data; generating temporal reference signals wherein each temporal reference signal is associated with at least one formatted video data block.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: November 19, 2013
    Assignee: Telegent Systems, Inc.
    Inventor: Samuel Sheng
  • Patent number: 8537281
    Abstract: A signal processing method by adding odd and even field SYNC data for neutralized effects including the steps of receiving an odd field SYNC data of an odd field, which is different at a certain data segment when compared with an even field SYNC data of an even field, and the even field SYNC data of the even field; adding the odd field SYNC data and the even field SYNC data to neutralize the odd and even field SYNC data so as to generate a combined odd and even field SYNC data; and performing a predetermined signal processing on an input signal according to the combined odd and even field SYNC data.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: September 17, 2013
    Assignee: Realtek Semiconductor Corp.
    Inventors: Yi-Lin Li, Cheng-Yi Huang
  • Patent number: 8525928
    Abstract: A signal transmission system includes a transmission apparatus and a reception apparatus, the transmission apparatus including: a first portion that converts a video signal into differential signals, converts a vertical synchronization signal into a common mode signal, and transmits the converted signals to the reception apparatus via three pairs of signal lines; and a second portion that converts a horizontal synchronization signal into differential signals, converts a first console signal into a common mode signal, transmits the converted signals to the reception apparatus via a single pair of signal lines; the reception apparatus including: a third portion that restores the differential signals to the video signal, and restores the common mode signal to the vertical synchronization signal; and a fourth portion that restores the differential signals to the horizontal synchronization signal, and restores the common mode signal to the first console signal.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: September 3, 2013
    Assignee: Fujitsu Component Limited
    Inventor: Masato Ozawa
  • Publication number: 20130033642
    Abstract: Various systems and methods are provided for transmission of related data components across independent streams. In one embodiment, among others, a transmitting device may separate transmission data into related data components and transmit each related data component in an associated transport stream. Each related data component includes a synchronization tag associated with synchronization of the related data component within the transmission data. In another embodiment, a receiving device may receive related data components transmitted in separate transport streams and decode the related data components based at least in part upon a synchronization tag included in each related data component.
    Type: Application
    Filed: August 3, 2012
    Publication date: February 7, 2013
    Applicant: BROADCOM CORPORATION
    Inventors: Wade Wan, Rajesh Mamidwar, Xuemin Chen, Marcus Kellerman, Brett Tischler
  • Patent number: 8233039
    Abstract: A microscope image pickup system includes: alight source; an object lens; a display device; a record device; a capture device for performing a preview mode in which an image of the test object obtained by the object lens is repeatedly captured and a plurality of captured images are continuously displayed on the display device, or an image record mode in which the image of the test object is captured and the captured image is recorded on the record device; an illumination light amount control device for controlling the amount of light of the illumination light; and a system control device for controlling an operation of the illumination light amount control device depending on the preview mode or the image record mode performed by the capture device.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: July 31, 2012
    Assignee: Olympus Corporation
    Inventors: Shinya Sakamoto, Shinichiro Aizaki
  • Patent number: 8233093
    Abstract: Disclosed is an automatic video gain control circuit, which includes an analog to digital converter, an envelope detector and an extreme value detector. The analog to digital converter converts an analog video signal to a digital video signal. The envelope detector detects a baseband amplitude signal according to the digital video signal. The extreme value detector generates an extreme value to control RF signal gain.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: July 31, 2012
    Assignee: MStar Semiconductor, Inc.
    Inventor: Shan-Tsung Wu
  • Publication number: 20110255001
    Abstract: In a video signal processing device, a host CPU sets a number of parameters for a memory table at its low-load timing such as during power-up. The host CPU then enables the function of an automatic setting controller. Being notified of start of automatic setting, the automatic setting controller reads plural clock setting parameters from the memory table, and performs clock setting in a clock generation section while waiting for stabilization of PLL oscillation. The automatic setting control section then reads plural signal processing parameters from the memory table and sets the parameters in a video signal processing section. Thus, in operation of the video signal processing section and the clock generation section according to the format of the input video signal, it is possible to set a number of setting parameters in these sections while reducing the load of the host CPU, shortening the image output time.
    Type: Application
    Filed: June 27, 2011
    Publication date: October 20, 2011
    Applicant: Panasonic Corporation
    Inventor: Yuuki NISHIO
  • Publication number: 20110063502
    Abstract: The present invention concerns a device and a method for inserting an interactive mark in a streaming content, said method comprising the steps of receiving a streaming content in a first format, receiving the same streaming content in a second format, receiving an interactive mark, corresponding to a first frame of said content in a first format and sending said interactive mark synchronized to a second frame of the content received in the second format, the content in said second frame corresponding to the content in said first frame.
    Type: Application
    Filed: May 14, 2009
    Publication date: March 17, 2011
    Applicant: THOMSON LICENSING
    Inventors: Yvon Legallais, Stéphane Gouache, Guillaume Bichot, Anthony Laurent
  • Publication number: 20110043690
    Abstract: A signal transmission system includes a transmission apparatus and a reception apparatus, the transmission apparatus including: a first portion that converts a video signal into differential signals, converts a vertical synchronization signal into a common mode signal, and transmits the converted signals to the reception apparatus via three pairs of signal lines; and a second portion that converts a horizontal synchronization signal into differential signals, converts a first console signal into a common mode signal, transmits the converted signals to the reception apparatus via a single pair of signal lines; the reception apparatus including: a third portion that restores the differential signals to the video signal, and restores the common mode signal to the vertical synchronization signal; and a fourth portion that restores the differential signals to the horizontal synchronization signal, and restores the common mode signal to the first console signal.
    Type: Application
    Filed: August 9, 2010
    Publication date: February 24, 2011
    Applicant: FUJITSU COMPONENT LIMITED
    Inventor: Masato Ozawa
  • Publication number: 20110032364
    Abstract: A method and circuitry for processing a video signal corresponding to a source synchronous video broadcast which corresponds to a selected channel which is one of a plurality of channels of a broadcast spectrum. In one aspect, the method includes generating digitized data of the video signal, which corresponds to the source synchronous video broadcast, using a local clock signal having a frequency which is different from the frequency of the source clock of the video broadcast; generating video data using the digitized data of the video signal; generating formatted video data blocks by arranging the video data into one or more lines or frames of video data; generating temporal reference signals wherein each temporal reference signal is associated with at least one formatted video data block.
    Type: Application
    Filed: August 4, 2010
    Publication date: February 10, 2011
    Inventor: Samuel Sheng
  • Patent number: 7555021
    Abstract: A Digital Multi-Source Multi-Destination Video Multiplexer and Crossbar Device and method which may be applied to a video imaging system, in which multiple input image sources including super-computer-generated digital image scenes, personal computer generated digital image scenes, or any machine with OC-48 fiber optically generated digital scenes are multiplexed, bit combined, and output as a selection of multiple digital video output formats.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: June 30, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Bryan J. Ogilvie
  • Patent number: 7346107
    Abstract: A VSB communication system or transmitter for processing supplemental data packets with MPEG-II data packets includes a VSB supplemental data processor and a VSB transmission system. The VSB supplemental data processor includes a Reed-Solomon coder for coding the supplemental data to be transmitted, a null sequence inserter for inserting a null sequence to an interleaved supplemental data for generating a predefined sequence, a header inserter for inserting an MPEG header to the supplemental data having the null sequence inserted therein, a multiplexer for multiplexing an MPEG data coded with the supplemental data having the MPEG header added thereto in a preset multiplexing ratio and units. The output of the multiplexer is provided to an 8T-VSB transmission system for modulating a data field from the multiplexer and transmitting the modulated data field to a VSB reception system.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: March 18, 2008
    Assignee: LG Electronics, Inc.
    Inventors: In Hwan Choi, Young Mo Gu, Kyung Won Kang, Kook Yeon Kwak
  • Patent number: 7072406
    Abstract: A digital serial interface connects a transmitting device with a receiving device for communicating both data bits and synchronization signals via the serial interface. The transmitting device include a primary transmitter for converting a serial sequence of the data bits into successive data signal levels, and further includes a secondary transmitter for converting synchronization signals into synchronization signal levels different from the levels employed for the data signals. The receiving device has a primary receiver for the data signal levels for converting a sequence of data signal levels into a serial sequence of data bits, and further includes a secondary receiver fir the synchronization signal levels for converting synchronization signal levels into synchronization signals.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: July 4, 2006
    Assignee: Nokia Mobile Phones Ltd.
    Inventors: Esa Härmä, Jouko Häkkänen
  • Patent number: 7053959
    Abstract: A mask circuit masks a digital video signal so that a video signal of an analog video signal is not outputted for a predetermined period after the start of output of a horizontal synchronizing signal of the analog video signal. A period of masking the digital video signal by the mask circuit is set in a control register, and the control register transmits the masking period to the mask circuit. A digital video signal to analog video signal converting unit converts the digital video signal masked and outputted from the mask circuit into an analog video signal. Thus, by setting in the control register the period of masking the digital video signal until the video signal of the analog video signal is stabilized, a digital video encoder can output a stable video signal.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: May 30, 2006
    Assignee: Sony Corporation
    Inventor: Naoki Hosoi
  • Patent number: 6278743
    Abstract: A circuit for developing correction signals for on-line controlling a precorrection arrangement in an HDTV 8VSB digital signal transmitter. The transmitted signal is sampled, sorted, smoothed and sliced to determine the symbol amplitude levels of the transmitted multilevel symbols. The centers of the sliced clusters of sampled symbol levels are used to determine the symbol amplitude levels. Correction signals for compensating the precorrection arrangement are developed based upon the determined symbol levels and the known symbol levels.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: August 21, 2001
    Assignee: Zenith Electronics Corporation
    Inventor: Frank C. Templin
  • Patent number: 5978424
    Abstract: A digital television signal includes successive frames of two fields each comprising 313 data segments with the first data segment in each field functioning as a field sync. The field sync segment comprises a 511 PN sequence and three 63 pseudo-random number (PN) sequences, with the middle one of the 63 PN sequences alternating polarity in successive fields. A reference data segment is compared with the 511 PN sequence in each data segment and the data segment with the least number of errors is identified as the first data segment in the field. The corresponding portion of the reference segment is compared with the middle 63 PN sequences in the identified first data segments and that with the least number of errors is determined to be the first segment in the frame. Confidence counters are used to assure reliable determinations.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: November 2, 1999
    Assignee: Zenith Electronics Corporation
    Inventor: Rudolf Turner
  • Patent number: 5959682
    Abstract: A circuit for detecting a data segment sync signal of data segment consisting of a plurality of symbols in a high-definition television, includes a correlator for detecting a correlation value from a received data segment signal, a segment integrator for accumulating the detected correlation value by segments and attenuating the accumulated correlation value in response to an overflow prevention signal, a maximum-value detector for detecting a maximum accumulated correlation value in the segment from the segment integrator output, an overflow prevention circuit for generating the overflow prevention signal by comparing the detected maximum accumulated correlation value with a predetermined reference value, a sync position detector for detecting a symbol position having the detected maximum accumulated correlation value, and a synchronization signal generator for generating a synchronization signal at the symbol position corresponding to the detected maximum accumulated correlation value.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: September 28, 1999
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki-bum Kim, Hyun-soo Shin
  • Patent number: 5955618
    Abstract: A field identification signal generating circuit for a receiver for receiving a high-definition signal, and a method therefor. According to the method, a first correlation value is calculated, between the high-definition signal and a first reference signal the same as a first known signal. A timing control signal, synchronized with a second known signal whose phase is alternately inverted in every field, is output when the first correlation value is greater than or equal to a predetermined value. A second correlation value is calculated, between the high-definition signal and a second reference signal the same as the second known signal. Information on the polarity of the second correlation value is output. A field identification signal is generated on the basis of the polarity information on the second correlation value which is synchronized with the timing control signal. Therefore, the field identification signal generating circuit can be realized with simple hardware.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: September 21, 1999
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ki-bum Kim
  • Patent number: 5903324
    Abstract: A transmitted high definition television signal is represented by a packetized datastream configured as a sequence of data fields with a non-uniform data rate due to different types of different duration non-data overhead information. Each data field is prefaced by a Field Sync overhead segment followed by 312 packetized data segments each with associated overhead information. At a transmitter, a transport processor forms data packets with associated headers and exhibits uninterrupted operation at a constant uniform data rate, while supplying a packetized datastream to a network which constructs sequential data fields by inserting the non-data overhead information into the datastream. The transport processor is advantageously operated at a constant uniform data rate without having to modify the original data field structure to accommodate the needs of the data field construction network.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: May 11, 1999
    Assignee: Thomson Multimedia S.A.
    Inventors: Paul Wallace Lyons, Alfonse Anthony Acampora
  • Patent number: 5801769
    Abstract: An apparatus including an image sensing system which receives light from an object and further outputs a video signal; a reproducing system which reproduces a video signal recorded on a recording medium; a selection circuit which selectively outputs either the video signal provided by the image sensing system or the video signal provided by the reproducing system; and a vibration compensation circuit which compensates picture vibrations of the video signal selected by the selection circuit. With this arrangement, it is possible to effectively avoid picture vibrations associated with video signals provided by the reproducing system and by the image sensing system, and thus it is possible to obtain excellent quality of pictures.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: September 1, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hisataka Hirose
  • Patent number: 5625418
    Abstract: For the preparation of data such as digitized television channel signals or television channel bundles, useful data are periodically replaced by a frame marker (F) in at least one of N parallel partial data streams of different bit significance. For this replacement, a partial data stream of low bit significance is selected because there the degradation is lowest. Because of this measure, the bit rate does not have to be increased in order to include a frame marker and a simple structure is possible for the multiplexer and demultiplexer at the respective transmission interfaces.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: April 29, 1997
    Assignee: ANT Nachrichtentechnik GmbH
    Inventors: Jann Binder, Georg Sussmeier, Klaus Krull, Wolfgang Bambach, Karlheinz Grotz
  • Patent number: 5619269
    Abstract: An ATV signal includes a field sync reference having a relatively long pseudo-random number symbol sequence followed by three relatively short pseudo-random number symbol sequences, with the middle of the three short pseudo-random number symbol sequences having inverted polarity in alternate fields.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 8, 1997
    Assignee: Zenith Electronics Corporation
    Inventors: Ronald B. Lee, Larry E. Nielsen
  • Patent number: 5602595
    Abstract: An ATV system encodes variable length elementary streams of data into a multilevel symbol signal comprising a plurality of multiplexed fixed length data packets without sync information. The fixed length data packets are arranged in fields of repetitive data segments, each of which includes a data segment sync and each field of which includes a field sync. The fields of data segments are transmitted as suppressed carrier VSB modulation. In an ATV receiver, the data segment sync is used to generate a timing signal that identifies the beginning of each fixed length data packet. In one embodiment, a packet sync signal is inserted into each recovered fixed length data packet for recovering the elementary streams of data. In another embodiment, recovery of the elementary streams of data is accomplished without inserting a packet sync signal.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 11, 1997
    Assignee: Zenith Electronics Corporation
    Inventors: Richard W. Citta, Mark Fimoff, Timothy G. Laud
  • Patent number: 5598220
    Abstract: A digital video field identification system includes video signals formatted in blocks of video symbols in repetitive data segments with each data segment including a synchronizing signal character. One data segment includes a field timing signal. A reference data segment which includes a reference field timing signal is developed at the receiver. A portion of each data segment is compared with the reference field timing signal and the number of symbol errors is accumulated for each data segment. The data segment exhibiting the least number of symbol errors is identified as the one having the field timing signal. A confidence counter stabilizes the identification of the one data segment. For terrestrial transmission, the video signals are precoded in modulo N form to enable NTSC co-channel interference rejection in the receiver by a linear filter.
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: January 28, 1997
    Assignee: Zenith Electronics Corporation
    Inventors: Richard W. Citta, Gary J. Sgrignoli, Rudolf Turner
  • Patent number: 5594506
    Abstract: A line sync detector for a digital television receiver receives digital television data including line synchronization code groups of four symbols having successive values of +S, -S, -S and +S at the beginning of each data line, S being a prescribed sample level. A first delay line has an input tap to which the digital television data are supplied, an output tap, first and second intermediate taps, a first symbol latch having an input connection from the input tap and having an output connection to the first intermediate tap, a second symbol latch having an input connection from the first intermediate tap and having an output connection to the second intermediate tap, and a third symbol latch having an input connection from the second intermediate tap and having an output connection to the output tap. The signals at the input tap, the first and second intermediate taps and the output tap of the first delay line are combined in 1:(-1):(-1):1 ratio to generate a combined response.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: January 14, 1997
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jian Yang
  • Patent number: 5534938
    Abstract: A digital data transmission system includes data signals formatted in successive fields consisting of blocks of video symbols in repetitive data segments with each data segment including a synchronizing signal character for providing data segment sync. The first data segment in each field includes a field timing signal that provides field sync. The digital data is in the form of M-level symbols and the sync information (both data segment and field) is in the form of N-level symbols, where M is greater than N.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: July 9, 1996
    Inventors: Richard W. Citta, Gary J. Sgrignoli, Rudolf Turner
  • Patent number: 5416524
    Abstract: A digital television signal includes data sent as multilevel symbols in successive data segments each including a synchronizing sync character. The detected synchronizing sync character produces a characteristic having two opposite polarity levels separated by a zero reference level, with the levels occurring at successive sampling points of the television signal, and a detection signal that has a peak occurring in time coincidence with the zero reference level. The detection signal controls sampling of the received television signal. The gain of the received signal is controlled by an AGC circuit that also responds to the detection signal.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: May 16, 1995
    Assignee: Zenith Electronics Corp.
    Inventors: Richard W. Citta, Dennis M. Mutzabaugh, Gary J. Sgrignoli
  • Patent number: 5327236
    Abstract: A compatible special effect signal can be produced without using an encoder or a special signal processor. Each of EDTV signals is divided into a main screen signal and a compensation screen signal. Compensation screen modification circuits modify the special position and size of the compensation screen signals such that the compensation screen signals match with the main screen signals in spacial position and size. The modified signals and the main screen signals are multiplexed in a frequency domain. The multiplexed signals are gated in response to a wipe signal and the gated signals are mixed with each other. The mixed signal is separated into the main screen signal and the compensation screen signal in the frequency domain. A compensation screen signal restorer circuit converts the frequency separated compensation screen signal into the original compensation signal which is mixed with the main screen signal to generate the wiped wide screen EDTV signal.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: July 5, 1994
    Assignee: Nippon Television Network Corporation
    Inventors: Yoshio Sugimori, Yoshihide Kimata
  • Patent number: RE43897
    Abstract: In a recording and reproducing apparatus for recording and reproducing video data, includes: a shuffling memory (6); a writing means for writing video data into the shuffling memory in accordance with the synchronizing signal and a write reference clock signal in synchronization with the video data; and a reading means for reading out the video data from the shuffling memory in accordance with a synchronizing signal and a stabilized read reference clock which is asynchronous with the write clock signal.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: January 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shuji Saito, Eiichi Takakura