Patent ID: 7391807
Filing Date: 2008-06-24
Classification: H04N

Abstract:
1. A method for transcoding a compressed multi-layer video bitstream, comprising: receiving, in a multi-layer to single-layer fine granular scalable transcoder, a compressed multi-layer video bitstream including a base layer and an enhancement layer; partially decoding the base layer; partially decoding the enhancement layer; combining, in the DCT domain, the partially decoded base layer and the partially decoded enhancement layer with a motion compensated signal yielding a partially decoded combined signal; quantizing the partially decoded combined signal into an output signal according to a quantization parameter; inverse quantizing the output signal to yield a reconstructed partially decoded combined signal; determining a difference between the partially decoded base layer and the reconstructed partially decoded combined signal; generating the motion compensation signal using the difference; and variable length encoding the output signal as a single layer bitstream.