US5844608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture element processor for a memory management system
Assignee: Thomson Licensing DTV SAS
•
Filing: 1996-12-12
•
Granted: 1998-12-01
•
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 19:20
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.
References Cited (Backward Citations)
US4541008A
Cited
US4858026A
Cited
EP0370823A2
Cited
EP0376679A2
Cited
US5121216A
Cited
US5396567A
Cited
US5307177A
Cited
EP0687111A2
Cited
US5708473A
Cited
US5635985A
Cited
EP0743794A2
Cited
EP0778709A1
Cited
EP0782345A2
Cited
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 |