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    Statistical multiplexer for a multichannel image compression system
    11.
    发明专利
    Statistical multiplexer for a multichannel image compression system 未知

    公开(公告)号：AU650219B2

    公开(公告)日：1994-06-09

    申请号：AU2995592

    申请日：1992-12-07

    Applicant: GEN INSTRUMENT CORP

    Inventor： PAIK WOO H ,  KRAUSE EDWARD A ,  LIU VINCENT ,  SHEN PAUL ,  DEROVANESSIAN HENRY

    IPC: H04N1/41 ,  G06T9/00 ,  H04N7/08 ,  H04N7/081 ,  H04N7/58 ,  H04N19/00 ,  H04N21/2365 ,  H04N21/434 ,  H04N7/12

    Abstract: A multichannel image compression system uses a plurality of encoders (10, 12 ... 14) to compress image data. A coding level command is provided to each of the encoders to specify a level of quality to be provided by each encoder. Encoded image data, provided by the encoders in response to the coding level command, is multiplexed (26) into a combined signal for transmission. The coding level command is adjusted in response to an accumulated amount of data from the combined signal, to maintain the accumulated data within a throughput capability of a communication channel (48). Although the coding level command may specify a global coding level that is the same for all of the encoders, the encoders can derive local coding levels from the global coding level to provide different encoding qualities. Decoder apparatus (30-46) is provided to recover an image from the compressed image data.

    12.
    发明专利
    未知

    公开(公告)号：NO924822D0

    公开(公告)日：1992-12-14

    申请号：NO924822

    申请日：1992-12-14

    Applicant: GEN INSTRUMENT CORP

    Inventor： PAIK WOO H ,  KRAUSE EDWARD A ,  LIU VINCENT ,  SHEN PAUL ,  DEROVANESSIAN HENRY

    IPC: H04N1/41 ,  G06T9/00 ,  H04N7/08 ,  H04N7/081 ,  H04N7/58 ,  H04N19/00 ,  H04N21/2365 ,  H04N21/434 ,  H04J

    Abstract: A multichannel image compression system uses a plurality of encoders (10, 12 ... 14) to compress image data. A coding level command is provided to each of the encoders to specify a level of quality to be provided by each encoder. Encoded image data, provided by the encoders in response to the coding level command, is multiplexed (26) into a combined signal for transmission. The coding level command is adjusted in response to an accumulated amount of data from the combined signal, to maintain the accumulated data within a throughput capability of a communication channel (48). Although the coding level command may specify a global coding level that is the same for all of the encoders, the encoders can derive local coding levels from the global coding level to provide different encoding qualities. Decoder apparatus (30-46) is provided to recover an image from the compressed image data.

    13.
    发明专利
    未知

    公开(公告)号：NO924452D0

    公开(公告)日：1992-11-18

    申请号：NO924452

    申请日：1992-11-18

    Applicant: GEN INSTRUMENT CORP

    Inventor： SHEN PAUL ,  PAIK WOO H ,  KRAUSE EDWARD A

    IPC: H03M7/00 ,  G06T1/60 ,  G11C7/10 ,  H04N5/907 ,  H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/50 ,  H04N

    Abstract: A multiple serial access memory is provided. A dynamic random access memory (30) is addressed to input data thereto and output data therefrom. Rows of data are output from the array (50) in response to address signals (34, 36, 38) provided thereto. A plurality of serial output ports (44, 46, 48) is coupled to the output of the array for selectively latching different rows of data output from the array. The serial output ports (44, 46, 48) are clocked to output the latched data therefrom. In an illustrated embodiment, each of the serial output ports contains a shift register (62, 64, 66, ... 68) having a length equal to the width of the memory array (30). The shift register is responsive to a first timing signal (42, 52) for latching a row of data from the array (30). A second timing signal actuates the shift register to shift a row of latched data. A serial access selector (70) coupled to the shift register outputs a selected portion of the shifted data from the serial output port. The memory has particular application as the frame store for a motion compensated interframe image coding/decoding system.

    15.
    发明专利
    未知

    公开(公告)号：NO914318D0

    公开(公告)日：1991-11-04

    申请号：NO914318

    申请日：1991-11-04

    Applicant: GEN INSTRUMENT CORP

    Inventor： KRAUSE EDWARD ,  PAIK WOO H ,  LIU VINCENT C ,  HELLER JERROLD A ,  SHEN PAUL ,  ESSERMAN JAMES NEIL

    IPC: G06T9/00 ,  H04N7/26 ,  H04N7/36 ,  H04N7/50 ,  H04N11/04 ,  H04N

    Abstract: An image area is refreshed during the transmission of a set of motion compensated sequential video images. The video images are divided into a plurality of adjacent regions. The image area is refreshed during a refresh cycle by communicating a different region in each successive video image of the set without motion compensation. Motion compensation of the previously refreshed regions of the image area during the refresh cycle is restricted to an area containing only the previously refreshed regions. Video image data from a current region being refreshed is encoded for use by a decoder in identifying it as non-motion compensated data.

    16.
    发明专利
    未知

    公开(公告)号：DE69333714T2

    公开(公告)日：2005-12-01

    申请号：DE69333714

    申请日：1993-03-16

    Applicant: GEN INSTRUMENT CORP

    Inventor： POLLMANN STEPHEN C ,  KRAUSE EDWARD A ,  SHEN PAUL ,  PAIK WOO H ,  MORONEY PAUL

    IPC: H03M7/40 ,  G06T9/00 ,  H03M7/42 ,  H04N7/26 ,  H04N7/30 ,  H03M7/30

    Abstract: Apparatus (10) is provided for decoding variable length code words to recover transform coefficients, such as DCT transform coefficients provided by a high definition television encoder. A first category of the code words has a length of no more than n bits. A second category has a length of greater than n bits. A feedback ROM (22) is used to decode the code words. Code words from the first category are processed by directly addressing a lookup table (80) in the ROM (22). Code words from the second category are processed using multiple passes through the ROM (22), wherein a portion of the data output during a prior pass is fed back (90) to address the memory during a subsequent pass.

    17.
    发明专利
    未知

    公开(公告)号：DE69229773D1

    公开(公告)日：1999-09-16

    申请号：DE69229773

    申请日：1992-12-10

    Applicant: GEN INSTRUMENT CORP

    Inventor： PAIK WOO H ,  KRAUSE EDWARD A ,  LIU VINCENT ,  SHEN PAUL ,  DEROVANESSIAN HENRY

    IPC: H04N1/41 ,  G06T9/00 ,  H04N7/08 ,  H04N7/081 ,  H04N7/58 ,  H04N19/00 ,  H04N21/2365 ,  H04N21/434 ,  H04N7/32 ,  H04N7/24

    Abstract: A multichannel image compression system uses a plurality of encoders (10, 12 ... 14) to compress image data. A coding level command is provided to each of the encoders to specify a level of quality to be provided by each encoder. Encoded image data, provided by the encoders in response to the coding level command, is multiplexed (26) into a combined signal for transmission. The coding level command is adjusted in response to an accumulated amount of data from the combined signal, to maintain the accumulated data within a throughput capability of a communication channel (48). Although the coding level command may specify a global coding level that is the same for all of the encoders, the encoders can derive local coding levels from the global coding level to provide different encoding qualities. Decoder apparatus (30-46) is provided to recover an image from the compressed image data.

    18.
    发明专利
    未知

    公开(公告)号：NO302210B1

    公开(公告)日：1998-02-02

    申请号：NO924822

    申请日：1992-12-14

    Applicant: GEN INSTRUMENT CORP

    Inventor： PAIK WOO H ,  KRAUSE EDWARD A ,  LIU VINCENT ,  SHEN PAUL ,  DEROVANESSIAN HENRY

    IPC: H04N1/41 ,  G06T9/00 ,  H04N7/08 ,  H04N7/081 ,  H04N7/58 ,  H04N19/00 ,  H04N21/2365 ,  H04N21/434 ,  H04N7/26

    Abstract: A multichannel image compression system uses a plurality of encoders (10, 12 ... 14) to compress image data. A coding level command is provided to each of the encoders to specify a level of quality to be provided by each encoder. Encoded image data, provided by the encoders in response to the coding level command, is multiplexed (26) into a combined signal for transmission. The coding level command is adjusted in response to an accumulated amount of data from the combined signal, to maintain the accumulated data within a throughput capability of a communication channel (48). Although the coding level command may specify a global coding level that is the same for all of the encoders, the encoders can derive local coding levels from the global coding level to provide different encoding qualities. Decoder apparatus (30-46) is provided to recover an image from the compressed image data.

    Transmission Error Recovery for Digital Communication Systems
    19.
    发明专利
    Transmission Error Recovery for Digital Communication Systems 未知

    公开(公告)号：CA2099436A1

    公开(公告)日：1994-01-15

    申请号：CA2099436

    申请日：1993-06-30

    Applicant: GEN INSTRUMENT CORP

    Inventor： SHEN PAUL ,  GROVER GLEN A ,  MORONEY PAUL

    IPC: H04B14/04 ,  H04N7/54 ,  H04N7/60 ,  H04N19/00 ,  H04N19/89 ,  H04N21/236 ,  H04N21/434 ,  H04L1/24 ,  H04L1/00 ,  G06F11/30 ,  H04N5/907 ,  H04N5/93 ,  H04N7/13 ,  H04N7/26

    Abstract: A succession of variable length data packets containing a header portion and data portion are received. Selected data from the data packet headers is stored in designated locations of a header memory. A data packet start address is provided with each stored header portion to designate a location in a data memory for commencing the storage of data contained in a corresponding data packet. The data from the received data packets is stored commencing in the data memory locations designated by the corresponding data packet start addresses. In an illustrated embodiment, the data packets are macroblocks from digitized television frames. A plurality of next data packet position indicators are provided in the data, for use in periodically verifying macroblock boundaries during the receipt of the television data and to provide a rapid recovery from a transmission error affecting the actual or identified length of a macroblock.

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