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Method and apparatus for predecoding hybrid bitstream

  • US 7,839,929 B2
  • Filed: 10/18/2005
  • Issued: 11/23/2010
  • Est. Priority Date: 10/18/2004
  • Status: Expired due to Fees
First Claim
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1. A method for predecoding a hybrid bitstream including a lower layer bitstream and an upper layer bitstream obtained by encoding a video with a predetermined resolution according to a target bit-rate, the method comprising:

  • obtaining a first bit-rate for a boundary between the lower layer bitstream and the upper layer bitstream and a second bit-rate for a boundary between motion information and texture information of the upper layer bitstream from the hybrid bitstream;

    determining, using a computer, the target bit-rate according to variable network circumstances; and

    when the target bit-rate is between the first bit-rate and the second bit-rate, skipping the motion information of the upper layer bitstream and truncating all bits of the texture information of the upper layer bitstream from a tail end of the upper layer bitstream, except bits corresponding to a difference between the target bit-rate and the first bit-rate.

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