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Compression/decompression engine for enhanced memory storage in MPEG decoder

  • US 6,157,740 A
  • Filed: 11/17/1997
  • Issued: 12/05/2000
  • Est. Priority Date: 11/17/1997
  • Status: Expired due to Fees
First Claim
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1. A compression unit for a system for decoding a digital video sequence, said system having a video decoder, memory and a memory controller, said compression unit to be coupled between said video decoder and said memory controller for compressing decoded video data output from the video decoder for storage in said memory by the memory controller, said compression unit comprising:

  • Hadamard transform logic for transforming the decoded video data output from the video decoder to a frequency domain signal using a Hadamard transformation;

    compression logic coupled to the transform logic for compressing the frequency domain signal to produce a compressed video signal; and

    wherein said Hadamard transform logic and said compression logic transform and compress multiple bytes of decoded video data in a single stage executed in a single clock cycle of said system to produce said compressed video signal.

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