Picture element processor for a memory management system
AssigneeThomson Consumer Electronics, Inc.
InventorsHaoping Yu, Greg Alan Kranawetter, Wai-man Lam
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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.
Claims18
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.
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.
Dependencies are inferred from the claim text.