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Scalable layered coding in a multi-layer, compound-image data transmission system

  • US 6,898,313 B2
  • Filed: 03/06/2002
  • Issued: 05/24/2005
  • Est. Priority Date: 03/06/2002
  • Status: Active Grant
First Claim
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1. A method for coding compound frames of data to be sent over a transmission channel, comprising:

  • accepting a frame of data at an input of a data coder;

    dividing the frame of data into one or more data blocks;

    classifying the one or more data blocks as either picture blocks or non-picture blocks according to a set of criteria;

    selecting either a picture block or a non-picture block as a next block to be coded;

    comparing the selected block to a block in a frame previous to the accepted frame;

    if the selected block is within a threshold difference of the block in the previous frame, generating a signal to use the block in the frame previous to the accepted frame, otherwise, if the selected block is a non-picture block, compressing the selected block using a first compression method, and dividing the selected block into at least two non-picture layers; and

    if the selected block is a picture block, compressing the selected block using a second compression method, and dividing the selected block into at least two picture layers.

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