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公开(公告)号：DK0467040T3
公开(公告)日：2000-01-31
申请号：DK91108087
申请日：1991-05-18
Applicant: GEN INSTRUMENT CORP
Inventor： KRAUSE EDWARD A , LIU VINCENT , ESSERMAN JIM , PAIK WOO H
Abstract: A method and apparatus are provided for processing digital video signals for transmission in a compressed form. A set of pixel data is compressed without motion compensation to provide a first compressed video signal. The pixel data is compressed using motion compensation to provide a second compressed video signal. The data in the first and second compressed video signals is quantified. A comparison is made to determine which of the signals contains the least data. Successive sets of pixel data are sequentially compressed and quantified and the compressed video signal having the least data for each particular set is selected. The selected signals are encoded to identify them as motion compensated or non-motion compensated signals, and combined to provide a compressed video signal data stream for transmission. Apparatus for receiving and decoding the signals is also disclosed.
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公开(公告)号：HK1010297A1
公开(公告)日：1999-06-17
申请号：HK98111264
申请日：1998-10-15
Applicant: GEN INSTRUMENT CORP
Inventor： CHEN XUEMIN , LIU VINCENT
Abstract: Disparity estimation between the right and left view pixel luminance values in a stereoscopic video signal is optimized by determining the minimum least-square-error between macroblocks of the right and left view pictures. Affine transform coefficients and disparity vectors which correspond to the minimum error are also determined and transmitted in the data stream for use by a decoder in reconstructing the right view picture. The scheme can be implemented either locally, at the macroblock level, or globally, at the picture level. At the macroblock level, least-square-error optimization may occur for each individual macroblock in the right view picture. In this case, affine transform coefficients are provided for each macroblock. At the picture level, the sum of the least-square-errors is minimized after the blocks of the right view picture are matched to the left view picture. In this case, only one set of affine transform coefficients are required for the entire right view picture. Or, block matching between an affinely transformed left view picture and the right view picture may be performed after minimizing the sum of the least-square-errors. The scheme is particularly useful in minimizing the effects of cross-channel luminance imbalances due to camera variations and scenes with significant changes in brightness or contrast, and is compatible with stereoscopic video systems such as the MPEG Multi-view Profile (MVP) system.
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公开(公告)号：DE69320226T2
公开(公告)日：1999-04-15
申请号：DE69320226
申请日：1993-03-16
Applicant: GEN INSTRUMENT CORP
Inventor： KRAUSE EDWARD A , TOM ADAM , LIU VINCENT
Abstract: A vector coding scheme for video transform coefficients is provided. A vector is generated to identify a group of coefficients from a block of transform coefficients that qualify for transmission according to predetermined criteria. In an illustrated embodiment, only coefficients having nonzero amplitudes are transmitted. The vector is encoded to provide a vector code word for transmission. The coefficients from the group qualifying for transmission are encoded to provide coefficient code words for transmission. The vector code word correlates the coefficient code words to coefficient locations in the block. In a preferred embodiment, the block is divided into a plurality of regions containing subsets of coefficients. A separate vector is transmitted for each region, correlating the coefficient code words to coefficient locations in the corresponding region of the block.
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公开(公告)号：CA2084178C
公开(公告)日：1998-11-03
申请号：CA2084178
申请日：1992-11-30
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 , H04N7/015 , H04N7/50
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.
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Patent Agency Ranking
公开(公告)号：MX9207549A
公开(公告)日：1994-05-31
申请号：MX9207549
申请日：1992-12-23
Applicant: GEN INSTRUMENT CORP
Inventor： SHEN PAUL , DEROVANESSIAN HENRY , PAIK WOO H , KRAUSE EDWARD A , LIU VINCENT
IPC: H04N1/41 , G06T9/00 , H04N7/08 , H04N7/081 , H04N7/58 , H04N19/00 , H04N21/2365 , H04N21/434 , G11B11/00
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.
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公开(公告)号：AU3998393A
公开(公告)日：1993-12-23
申请号：AU3998393
申请日：1993-06-02
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , KRAUSE EDWARD A , LIU VINCENT
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公开(公告)号：NO924822L
公开(公告)日：1993-06-25
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 , H04N7/12
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.
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公开(公告)号：NO912273L
公开(公告)日：1991-12-16
申请号：NO912273
申请日：1991-06-13
Applicant: GEN INSTRUMENT CORP
Inventor： KRAUSE EDWARD A , PAIK WOO H , LIU VINCENT , ESSERMAN JIM
Abstract: A method and apparatus are provided for processing digital video signals for transmission in a compressed form. A set of pixel data is compressed without motion compensation to provide a first compressed video signal. The pixel data is compressed using motion compensation to provide a second compressed video signal. The data in the first and second compressed video signals is quantified. A comparison is made to determine which of the signals contains the least data. Successive sets of pixel data are sequentially compressed and quantified and the compressed video signal having the least data for each particular set is selected. The selected signals are encoded to identify them as motion compensated or non-motion compensated signals, and combined to provide a compressed video signal data stream for transmission. Apparatus for receiving and decoding the signals is also disclosed.
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公开(公告)号：NO912273A
公开(公告)日：1991-12-16
申请号：NO912273
申请日：1991-06-13
Applicant: GEN INSTRUMENT CORP
Inventor： KRAUSE EDWARD A , PAIK WOO H , LIU VINCENT , ESSERMAN JIM
CPC classification number: H04N19/107 , H04N19/51 , H04N19/61
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