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Method and a device for transmission of a variable bit-rate compressed video bitstream over constant and variable capacity networks

  • US 6,529,552 B1
  • Filed: 02/15/2000
  • Issued: 03/04/2003
  • Est. Priority Date: 02/16/1999
  • Status: Expired due to Term
First Claim
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1. A method for controlling a digitally compressed video bitstream for achieving constant quality video delivery over a constant capacity channel, the method comprising the steps of:

  • providing an encoder;

    providing a digitally compressed video bitstream having frames;

    analyzing a quantity of bits used to compress each frame;

    imposing a constant bit budget per frame to optimize and control visual and audio quality; and

    repositioning an excess set of bits above the bit budget associated with an original bitstream position in a first frame to a predetermined bitstream field associated with a second frame having a lesser number of bits than the first frame to create an altered bitstream that has a more constant quality which substantially meets the imposed bit budget.

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