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Method and apparatus for providing scalable pre-compressed digital video with reduced quantization based artifacts (continuation)

  • US 20030072370A1
  • Filed: 11/12/2002
  • Published: 04/17/2003
  • Est. Priority Date: 11/27/1996
  • Status: Active Grant
First Claim
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1. An apparatus for generating a video sequence comprising:

  • a first interframe coder operative to receive and interframe code an input video signal with a first predetermined coarseness of quantization and to generate a first interframe coded bitstream having a first bit rate;

    a reconstructor operative to reconstruct a frame of the video signal from the first interframe coded bitstream and to generate a reconstructed frame having a quantization error corresponding to the first predetermined coarseness of quantization;

    a second or an additional interframe coder operative to receive the video signal and interframe code the input video signal with a second predetermined coarseness of quantization to generate a second interframe or an additionally coded bitstream having a second bit rate which is different than the first bit rate, such that each of the first and second bitstreams is an independently viewable version of the video signal at a different coarseness of quantization, wherein said second or additional interframe coder is operative to receive the reconstructed frame with the input video signal such that the second interframe or the additionally coded bitstream includes a coded frame based on the reconstructed frame.

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