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

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.OSAKA26318

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bannai, Tatsushi Osaka, JP 61 564
Shibata, Hideaki Osaka, JP 50 410

Cited Art Landscape

Patent Info (Count) # Cites Year
 
SONY CORPORATION (3)
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NIPPON TELEGRAPH AND TELEPHONE CORPORATION (1)
4,547,811 Method and apparatus for gray level signal processing 116 1982

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
BROADCOM CORPORATION (52)
6,927,783 Graphics display system with anti-aliased text and graphics feature 6 1999
6,744,472 Graphics display system with video synchronization feature 28 1999
6,738,072 Graphics display system with anti-flutter filtering and vertical scaling feature 15 1999
6,700,588 Apparatus and method for blending graphics and video surfaces 56 1999
6,661,427 Graphics display system with video scaler 27 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 64 1999
7,446,774 Video and graphics system with an integrated system bridge controller 8 2000
6,975,324 Video and graphics system with a video transport processor 51 2000
6,853,385 Video, audio and graphics decode, composite and display system 63 2000
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6,768,774 Video and graphics system with video scaling 34 2000
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6,538,656 Video and graphics system with a data transport processor 144 2000
6,529,935 Graphics display system with unified memory architecture 4 2000
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6,819,330 Graphics display System with color look-up table loading mechanism 1 2001
6,781,601 Transport processor 52 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 17 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 7 2003
7,530,027 Graphics display system with graphics window control mechanism 3 2003
7,538,783 Graphics display system with video scaler 7 2003
7,002,602 Apparatus and method for blending graphics and video surfaces 4 2003
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6,879,330 Graphics display system with anti-flutter filtering and vertical scaling feature 3 2004
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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
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7,489,729 Method and apparatus for implementing reduced memory mode for high-definition television 2 2005
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7,310,104 Graphics display system with anti-flutter filtering and vertical scaling feature 5 2006
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7,545,438 Graphics display system with video synchronization feature 2 2007
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7,554,553 Graphics display system with anti-flutter filtering and vertical scaling feature 4 2007
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6,731,295 Graphics display system with window descriptors 6 1999
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7,598,962 Graphics display system with window descriptors 2 2004
 
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6,560,285 Region-based information compaction as for digital images 12 1999
RE42589 Enhanced MPEG information distribution apparatus and method 0 2006
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SONY CORPORATION (2)
5,610,998 Apparatus for effecting A/D conversion on image signal 5 1994
5,469,216 Apparatus and method for processing a digital video signal to produce interpolated data 121 1994
 
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7,403,565 Region-based information compaction as for digital images 3 2003
 
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8,374,237 High precision encoding and decoding of video images 3 2001
 
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5,818,974 Image coding apparatus 11 1997
 
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5,491,685 System and method of digital compression and decompression using scaled quantization of variable-sized packets 13 1994
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
6,542,549 Method and model for regulating the computational and memory requirements of a compressed bitstream in a video decoder 22 1999
 
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6,167,086 Overhead data processor in a memory efficient image processing system 5 1997

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