US Patent No: 5,307,177

Number of patents in Portfolio can not be more than 2000

High-efficiency coding apparatus for compressing a digital video signal while controlling the coding bit rate of the compressed digital data so as to keep it constant

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Abstract

Digital video signals are divided in blocks, maximum and minimum values of each block are extracted, and a frequency distribution of one frame period of a dynamic range in each block is detected. The coding condition is determined by the frequency distribution and a predetermined N kinds of characteristic tables, and by determining only one characteristic table, the signal obtained by subtracting the minimum value of each block from the digital video signals of each block is coded in variable length according to the dynamic range of each block. The characteristic table shows the relationship of the distortion or the number of quantization bits between the original signal and decoded signal after coding and decoding with respect to the dynamic range of digital video signal in each block, and the picture quality of decoded image is set as a parameter.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.OSAKA27275

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bannai, Tatsushi Osaka, JP 56 501
Shibata, Hideaki Osaka, JP 42 370

Cited Art

Patent Info (Count) # Cites Year
 
SONY CORPORATION (3)
4,703,352 High efficiency technique for coding a digital video signal 114 1985
4,710,811 Highly efficient coding apparatus for a digital video signal 98 1985
5,166,987 Encoding apparatus with two stages of data compression 68 1991
 
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (1)
4,547,811 Method and apparatus for gray level signal processing 115 1982

Patent Citation Ranking

Forward Cites

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BROADCOM CORPORATION (51)
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6,744,472 Graphics display system with video synchronization feature 26 1999
6,738,072 Graphics display system with anti-flutter filtering and vertical scaling feature 14 1999
6,700,588 Apparatus and method for blending graphics and video surfaces 34 1999
6,661,427 Graphics display system with video scaler 23 1999
6,630,945 Graphics display system with graphics window control mechanism 11 1999
6,608,630 Graphics display system with line buffer control scheme 8 1999
6,570,579 Graphics display system 60 1999
7,446,774 Video and graphics system with an integrated system bridge controller 4 2000
6,975,324 Video and graphics system with a video transport processor 34 2000
6,853,385 Video, audio and graphics decode, composite and display system 58 2000
6,798,420 Video and graphics system with a single-port RAM 40 2000
6,768,774 Video and graphics system with video scaling 27 2000
6,636,222 Video and graphics system with an MPEG video decoder for concurrent multi-row decoding 57 2000
6,573,905 Video and graphics system with parallel processing of graphics windows 97 2000
6,538,656 Video and graphics system with a data transport processor 131 2000
6,529,935 Graphics display system with unified memory architecture 3 2000
6,983,017 Method and apparatus for implementing reduced memory mode for high-definition television 10 2001
6,819,330 Graphics display System with color look-up table loading mechanism 1 2001
6,781,601 Transport processor 45 2002
6,721,837 Graphics display system with unified memory architecture 7 2002
6,870,538 Video and graphics system with parallel processing of graphics windows 15 2003
7,057,622 Graphics display system with line buffer control scheme 1 2003
7,277,099 Video and graphics system with an MPEG video decoder for concurrent multi-row decoding 6 2003
7,530,027 Graphics display system with graphics window control mechanism 3 2003
7,538,783 Graphics display system with video scaler 2 2003
7,002,602 Apparatus and method for blending graphics and video surfaces 3 2003
7,015,928 Graphics display system with color look-up table loading mechanism 1 2004
6,879,330 Graphics display system with anti-flutter filtering and vertical scaling feature 3 2004
7,991,049 Video and graphics system with video scaling 0 2004
7,227,582 Graphics display system with video synchronization feature 2 2004
7,365,752 Video and graphics system with a single-port RAM 11 2004
8,063,916 Graphics layer reduction for video composition 1 2004
7,110,006 Video, audio and graphics decode, composite and display system 22 2004
7,071,944 Video and graphics system with parallel processing of graphics windows 1 2005
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7,184,058 Graphics display system with anti-aliased text and graphics feature 4 2005
7,489,729 Method and apparatus for implementing reduced memory mode for high-definition television 1 2005
7,667,710 Graphics display system with line buffer control scheme 1 2006
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7,545,438 Graphics display system with video synchronization feature 2 2007
7,848,430 Video and graphics system with an MPEG video decoder for concurrent multi-row decoding 6 2007
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7,554,562 Graphics display system with anti-flutter filtering and vertical scaling feature 1 2007
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8,199,154 Low resolution graphics mode support using window descriptors 0 2011
 
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6,731,295 Graphics display system with window descriptors 6 1999
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6,560,285 Region-based information compaction as for digital images 11 1999
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MINOLTA CO., LTD. (2)
6,366,702 Method of and apparatus for image processing 2 1998
6,404,919 Image processor for encoding image data 18 1998
 
MITSUBISHI DENKI KABUSHIKI KAISHA (2)
5,583,573 Video encoder and encoding method using intercomparisons of pixel values in selection of appropriation quantization values to yield an amount of encoded data substantialy equal to nominal amount 35 1995
6,052,488 Image coding apparatus for converting image information to variable length codes of predetermined code size, method of image coding and apparatus for storing/transmitting image 13 1997
 
SONY CORPORATION (2)
5,610,998 Apparatus for effecting A/D conversion on image signal 5 1994
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AKIKAZE TECHNOLOGIES, INC. (1)
7,403,565 Region-based information compaction as for digital images 3 2003
 
DOLBY LICENSING CORPORATION (1)
8,374,237 High precision encoding and decoding of video images 0 2001
 
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5,818,974 Image coding apparatus 11 1997
 
MARK KLEIN (1)
5,491,685 System and method of digital compression and decompression using scaled quantization of variable-sized packets 12 1994
 
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6,542,549 Method and model for regulating the computational and memory requirements of a compressed bitstream in a video decoder 21 1999
 
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6,167,086 Overhead data processor in a memory efficient image processing system 5 1997