Patent EP0385654A2 successfully refreshed from Google Patents.
EP0385654A2
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EP
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Highly efficient coding apparatus
Assignee: Sony Corp
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Filing: 1990-02-21
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Granted: —
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Expires: 2010-02-21
Abstract
Abstract A highly efficient coding apparatus for coding digital video data in a block format allowing video data compression by data transmission channel having a predetermined transmission capacity, wherein the coefficient data including a DC component and a plurality of AC components for each block is generated by the orthogonal transformation. A first distribution table of the AC coefficient data is generated during a predetermined period, and a second distribution table of accumulating type is generated from the first distribution table. The total bit number of the ACA coefficient data during the predetermined period is controlled by the second distribution table and the predetermined transmission capacity of the data transmission channel, and the DC coefficient data, the controlled AC coefficient data and an additional code for each the predetermined period are transmitted.
Inventors
- 👤 Norihisa C/O Sony Corporation Shirota
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:28
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/10; H04N19/189; H04N19/192; H04N19/102; H04N19/115; H04N19/124; H04N19/126; H04N19/134; H04N19/136; H04N19/14; H04N19/146; H04N19/149; H04N19/169; H04N19/17; H04N19/176; H04N19/60; H04N19/61; H04N19/152
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
A highly efficient coding apparatus for coding digital video data in a block format allowing video data compression for transmission by data transmission means having a predetermined transmission capacity, comprising: block segmentation means supplied with said digital video data and for generating block data, orthogonal transformation means supplied with said block data and for generating coefficient data including a DC component and a plurality of AC components for each block, means for generating a first distribution table of said AC coefficient data during a predetermined period, means for generating a second distribution table of accumulating type from said first distribution table, means for controlling the total bit number of said AC coefficient data during said predetermined period by said second distribution table and said predetermined transmission capacity of said data transmission means, means for transmitting said DC coefficient data, said controlled AC coefficient data and an additional code for each said predetermined period.
Claim 2
Dependent Claim
153 words
A highly efficient coding apparatus for coding digital video data in a block format allowing video data compression for transmission by data transmission means having a predetermined transmission capacity, comprising: block segmentation means supplied with said digital video data and for generating block data, orthogonal transformation means supplied with said block data and for generating coefficient data including a DC component and a plurality of AC components for each block, means for generating a first distribution table of said AC coefficient data during a predetermined period, means for generating a second distribution table of accumulating type from said first distribution table, means for controlling the total bit number of said AC coefficient data during said predetermined period by said second distribution table and said predetermined transmission capacity of said data transmission means, means for transmitting said DC coefficient data, said controlled AC coefficient data and an additional code for each said predetermined period.
Claim 3
Dependent Claim
61 words
A highly efficient coding apparatus as claimed in claim 1, wherein said means for controlling includes calculating means for calculating the total bit number of said AC coefficient data during said predetermined period on the basis of said second distribution table, and comparator means for comparing said calculated total bit number with said predetermined transmission capacity of said data transmission means.
Claim 4
Dependent Claim
123 words
A highly efficient coding apparatus for coding digital video data in a block format allowing video data compression for transmission by data transmission means, comprising: block segmentation means supplied with said digital video data and for generating block data, orthogonal transformation means supplied with said block data and for generating coefficient data including a DC component and a plurality of AC components for each block, sub-block segmentation means supplied with said AC coefficient data of each block and for dividing the same into a plurality of sub-block, means for generating address informations indicating said sub-block in which significant coefficient data to be transmitted is included, means for transmitting said DC coefficient data, said address informations, and said significant coefficient data for each block.
Claim 5
Dependent Claim
123 words
A highly efficient coding apparatus for coding digital video data in a block format allowing video data compression for transmission by data transmission means, comprising: block segmentation means supplied with said digital video data and for generating block data, orthogonal transformation means supplied with said block data and for generating coefficient data including a DC component and a plurality of AC components for each block, sub-block segmentation means supplied with said AC coefficient data of each block and for dividing the same into a plurality of sub-block, means for generating address informations indicating said sub-block in which significant coefficient data to be transmitted is included, means for transmitting said DC coefficient data, said address informations, and said significant coefficient data for each block.
Claim 6
Dependent Claim
126 words
A highly efficient coding apparatus for coding digital video data in a block format allowing video data compression for transmission by data transmission means, comprising: block segmentation means supplied with said digital video data and for generating block data, orthogonal transformation means supplied with said block data and for generating coefficient data including a DC component and a plurality of AC components for each block, sub-block segmentation means supplied with said AC coefficient data of each block and for sequentially generating smaller sub-block data from larger size sub-block data, means for generating transmission pattern data for each size of sub-block indicating the transmission pattern of smaller size sub-block, means for transmitting said DC coefficient data, said transmission pattern data, and significant coefficient data for each block.
Claim 7
Dependent Claim
126 words
A highly efficient coding apparatus for coding digital video data in a block format allowing video data compression for transmission by data transmission means, comprising: block segmentation means supplied with said digital video data and for generating block data, orthogonal transformation means supplied with said block data and for generating coefficient data including a DC component and a plurality of AC components for each block, sub-block segmentation means supplied with said AC coefficient data of each block and for sequentially generating smaller sub-block data from larger size sub-block data, means for generating transmission pattern data for each size of sub-block indicating the transmission pattern of smaller size sub-block, means for transmitting said DC coefficient data, said transmission pattern data, and significant coefficient data for each block.
References Cited (Backward Citations)
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