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US5844608A
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Picture element processor for a memory management system
Assignee: Thomson Licensing DTV SAS
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Filing: 1996-12-12
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Granted: 1998-12-01
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Expires: 2016-12-12
Abstract
Abstract A television receiver includes an MPEG decoder for providing decoded pixel blocks. Decoded pixels are recompressed prior to storage in frame memory. In the recompression process a reference first pixel is compressed as a function of a pixel block parameter. A reconstructed reference pixel value is used in a prediction network when reconstructing remaining pixels of the pixel block prior to display. A first pixel processor accurately compresses a reference pixel which prevents the propagation of a prediction error throughout the reconstructed block.
Inventors
- 👤 Haoping Yu
- 👤 Greg Alan Kranawetter
- 👤 Wai-Man Lam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:44
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/10; H04N19/169; H04N19/17; H04N19/176; H04N19/42; H04N19/423; H04N19/426; H04N19/428; H04N19/50; H04N19/593; H04N19/60; H04N19/61; H04N19/102; H04N19/13; H04N19/90; H04N19/91
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
58 words
A system for processing a data stream of compressed image representative pixel data blocks comprising: a first decompressor (62, 64) for decompressing said pixel blocks to produce decompressed data; a compressor (12) for recompressing said decompressed data into recompressed data as a function of a predetermined pixel block parameter; and a memory (14) for storing said recompressed data.
Claim 2
Independent Claim
58 words
A system for processing a data stream of compressed image representative pixel data blocks comprising: a first decompressor (62, 64) for decompressing said pixel blocks to produce decompressed data; a compressor (12) for recompressing said decompressed data into recompressed data as a function of a predetermined pixel block parameter; and a memory (14) for storing said recompressed data.
Claim 3
Dependent Claim
48 words
A system according to claim 1, wherein: said block parameter is selected from at least one of the parameters including the minimum pixel value, the maximum pixel value, a reference pixel value, a range of pixel values, the mean block pixel value, and the median block pixel value.
Claim 4
Dependent Claim
20 words
A system according to claim 2, wherein: said compressor (12) and said second decompressor (16) exhibit mutually inverse operating characteristics.
Claim 5
Dependent Claim
46 words
A system according to claim 1, further comprising: a second decompressor (16) for decompressing recompressed data from said memory as a function of said block parameter; and an output network (54, 56) including a display processor (54) for processing data decompressed by said second decompressor (16).
Claim 6
Dependent Claim
37 words
A system according to claim 4, further comprising: a third decompressor (50) for decompressing said recompressed data; and a motion compensation system (70) for providing motion compensated data in response to decompressed data from said third decompressor.
Claim 7
Dependent Claim
51 words
A system according to claim 1, wherein: said compressor recompresses a reference pixel of a data block as a function of said block parameter, and wherein said system further includes a pixel prediction network (18) responsive to said reference pixel to facilitate predictive processing of other pixels of said pixel block.
Claim 8
Dependent Claim
15 words
A system according to claim 6, wherein: said block parameter is the minimum pixel value.
Claim 9
Dependent Claim
20 words
A system according to claim 6, wherein: said compressor (12) and said second decompressor (16) exhibit mutually inverse operating characteristics.
Claim 10
Dependent Claim
97 words
In a system for processing a data stream of image information including MPEG compressed pixel blocks constituting an image frame, said pixel blocks each having a block parameter, a processor comprising: a first decompressor (62, 64) for decompressing said data stream into decompressed pixel block data; a compression network (12) for recompressing said decompressed pixel data into recompressed data as a function of said block parameter; a pixel prediction network (18) responsive to a reference pixel to facilitate predictive processing of other pixels of said data block; and a frame memory (14) for storing said recompressed data.
Claim 11
Dependent Claim
97 words
In a system for processing a data stream of image information including MPEG compressed pixel blocks constituting an image frame, said pixel blocks each having a block parameter, a processor comprising: a first decompressor (62, 64) for decompressing said data stream into decompressed pixel block data; a compression network (12) for recompressing said decompressed pixel data into recompressed data as a function of said block parameter; a pixel prediction network (18) responsive to a reference pixel to facilitate predictive processing of other pixels of said data block; and a frame memory (14) for storing said recompressed data.
Claim 12
Dependent Claim
15 words
A system according to claim 9, wherein: said block parameter is the minimum pixel value.
Claim 13
Dependent Claim
38 words
A system according to claim 9, said compression network (12) further comprising: a first data reduction network (30) for processing said reference pixel; and a second data reduction network (28) for processing other pixels of the pixel block.
Claim 14
Dependent Claim
48 words
A system according to claim 11, wherein: said block parameter is selected from at least one of the parameters including the minimum pixel value, the maximum pixel value, a reference pixel value, a range of pixel values, the mean block pixel value, and the median block pixel value.
Claim 15
Dependent Claim
22 words
A system according to claim 11, wherein: said first data reduction network (30) and said second data reduction network (28) are quantizers.
Claim 16
Dependent Claim
20 words
A system according to claim 13, wherein: said compressor (12) and said second decompressor (16) exhibit mutually inverse operating characteristics.
Claim 17
Dependent Claim
48 words
A system according to claim 9, further comprising: a second decompressor (16) for decompressing recompressed data from said frame memory (14) as a function of said block parameter; and an output network (54, 56) including a display processor (54) for processing data decompressed by said second decompressor (16).
Claim 18
Dependent Claim
37 words
A system according to claim 15, further comprising: a third decompressor (50) for decompressing said recompressed data; and a motion compensation system (70) for providing motion compensated data in response to decompressed data from said third decompressor.
Claim 19
Dependent Claim
56 words
A system according to claim 15, wherein: said second decompressor (16) decompresses a reference pixel of a data block as a function of said block parameter, and wherein said system further includes a second pixel prediction network (24) responsive to said reference pixel to facilitate predictive processing of other pixels of said data block during decompression.
Claim 20
Dependent Claim
38 words
A system according to claim 17, said second decompressor (16) further comprising: a first data reconstruction network (38) for processing said reference pixel; and a second data reconstruction network (36) for processing other pixels of the pixel 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) | 2001-11-30 | 2002-06-01 | 2002-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-30 | 2006-06-01 | 2006-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-30 | 2010-06-01 | 2010-12-01 | $7700.00 | Window Closed / Lapsed |