US5703889A
Expired / Lapsed
US
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High efficiency coding signal processing apparatus with error propagation influence reduction
Assignee: Toshiba Corp
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Filing: 1994-12-14
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Granted: 1997-12-30
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Expires: 2014-12-14
Abstract
Abstract According to a high efficiency coding signal processing apparatus of the present invention, in order to suppress error propagation, effectively correct errors, and reduce a signal deterioration upon repetitive coding processing, a bit rate reduction circuit quantizes a video signal and outputs the resultant signal to low-and high-frequency encoders. A first transmission sequence packet circuit outputs low-frequency components at a predetermined period. A second transmission sequence packet circuit sequences and outputs high-frequency components. Since the low-frequency components and the high-frequency components are separately sequenced and transmitted, the low-frequency components are free from the influence of errors caused in the high-frequency components.
Inventors
- 👤 Kenji Shimoda
- 👤 Hitoshi Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:28
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9261; H04N5/9264; H04N19/00; H04N19/10; H04N19/102; H04N19/115; H04N19/124; H04N19/134; H04N19/136; H04N19/14; H04N19/146; H04N19/149; H04N19/15; H04N19/157; H04N19/159; H04N19/169; H04N19/17; H04N19/172; H04N19/176; H04N19/18; H04N19/186; H04N19/30; H04N19/37; H04N19/46; H04N19/60; H04N19/85; H04N19/89; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N21/40; H04N21/43; H04N21/434; H04N7/00; H04N7/24; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/8047; H04N9/806; H04N9/8063; H04N9/8066; H04N9/87; H04N9/88; H04N9/888; H04N19/13; H04N19/65; H04N19/90; H04N19/91; H04N5/78; H04N5/782; H04N5/783
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
288 words
A high efficiency coding signal processing apparatus comprising: data compressing means for frequency transforming data which represents a frame of information and outputting transform coefficients, indicative thereof, the transform coefficients including low-frequency components and high-frequency components, the data comprising a predetermined number of blocks, each block comprising a predetermined number of pixels; low-frequency component coding means for receiving the low-frequency components of the transform coefficients outputted by the data compressing means, and for outputting low-frequency data by encoding the low-frequency components; high-frequency component coding means for receiving the high-frequency components of the transform coefficients outputted by the data compressing means, and for outputting high-frequency data by encoding the high-frequency components; first transmission sequence packet means for receiving the low-frequency data outputted by the low-frequency component coding means, for performing predetermined sequencing with respect to the low-frequency data at a first predetermined period including at least two blocks thereof, and for outputting sequenced low-frequency data; second transmission sequence packet means for receiving the high-frequency data outputted by the high-frequency component coding means, for performing predetermined sequencing with respect to the high-frequency data at a second predetermined period so that block numbers of the high-frequency data correspond to block numbers of the low-frequency data sequenced by said first transmission sequence packet means, and for outputting sequenced high frequency data; and transmitting means for separately transmitting the sequenced low-frequency data output by the first transmission sequence packet means and the sequenced high-frequency data output by the second transmission sequence packet means, so as to arrange all of the sequenced high-frequency data after all of the sequenced low-frequency data, thereby permitting the data to be determined based on the sequenced low-frequency data, even if an error occurs within the sequenced high-frequency data.
Claim 2
Dependent Claim
288 words
A high efficiency coding signal processing apparatus comprising: data compressing means for frequency transforming data which represents a frame of information and outputting transform coefficients, indicative thereof, the transform coefficients including low-frequency components and high-frequency components, the data comprising a predetermined number of blocks, each block comprising a predetermined number of pixels; low-frequency component coding means for receiving the low-frequency components of the transform coefficients outputted by the data compressing means, and for outputting low-frequency data by encoding the low-frequency components; high-frequency component coding means for receiving the high-frequency components of the transform coefficients outputted by the data compressing means, and for outputting high-frequency data by encoding the high-frequency components; first transmission sequence packet means for receiving the low-frequency data outputted by the low-frequency component coding means, for performing predetermined sequencing with respect to the low-frequency data at a first predetermined period including at least two blocks thereof, and for outputting sequenced low-frequency data; second transmission sequence packet means for receiving the high-frequency data outputted by the high-frequency component coding means, for performing predetermined sequencing with respect to the high-frequency data at a second predetermined period so that block numbers of the high-frequency data correspond to block numbers of the low-frequency data sequenced by said first transmission sequence packet means, and for outputting sequenced high frequency data; and transmitting means for separately transmitting the sequenced low-frequency data output by the first transmission sequence packet means and the sequenced high-frequency data output by the second transmission sequence packet means, so as to arrange all of the sequenced high-frequency data after all of the sequenced low-frequency data, thereby permitting the data to be determined based on the sequenced low-frequency data, even if an error occurs within the sequenced high-frequency data.
Claim 3
Dependent Claim
30 words
An apparatus according to claim 1, wherein said second transmission sequence packet means includes means for separately arranging Huffman codes and non-zero coefficient data codes included in the high-frequency components.
Claim 4
Dependent Claim
143 words
An apparatus according to claim 1, wherein: said first transmission sequence packet means sequences the low-frequency data at the first predetermined period so as to include two blocks of luminance signals and two blocks of color difference signals within a first area of the data; said second transmission sequence packet means sequences the high-frequency data at the second predetermined period so as to include two blocks of luminance signals and two blocks of color difference signals within a second area of the data; and said transmitting means arranges the low-frequency data and the high frequency data in the following order: the two blocks of luminance signals of the low-frequency data, the two blocks of color difference signals of the low-frequency data, the two blocks of luminance signals of the high-frequency data, and the two blocks of color difference signals of the high-frequency data.
Claim 5
Dependent Claim
130 words
A high efficiency coding signal processing apparatus comprising: decoding means for decoding variable-length data, the variable-length data being encoded in units of predetermined blocks within a frame; a decoding error detector for detecting an error block within the decoded data; holding means for holding the decoded data; and data length estimation means for receiving, from the holding means, a selected one of the blocks of the decoded data, for estimating, based upon a data length of the selected one of the blocks, a data length of the error block, and for designating a starting position for the decoding means to decode a subsequent block, the starting position being based upon the estimated data length of the error block, the selected block being the block which directly precedes the error block.
Claim 6
Dependent Claim
130 words
A high efficiency coding signal processing apparatus comprising: decoding means for decoding variable-length data, the variable-length data being encoded in units of predetermined blocks within a frame; a decoding error detector for detecting an error block within the decoded data; holding means for holding the decoded data; and data length estimation means for receiving, from the holding means, a selected one of the blocks of the decoded data, for estimating, based upon a data length of the selected one of the blocks, a data length of the error block, and for designating a starting position for the decoding means to decode a subsequent block, the starting position being based upon the estimated data length of the error block, the selected block being the block which directly precedes the error block.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-29 | 2001-06-30 | 2001-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-29 | 2005-06-30 | 2005-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-29 | 2009-06-30 | 2009-12-30 | $7700.00 | Window Closed / Lapsed |