Patent ID: 6925126
Filing Date: 2005-08-02
Classification: H04N

Abstract:
1. An MPEG decoder for improving decoding efficiency by scaling the decoding of an encoded digital video signal, comprising: means for decoding a compressed video data stream including a plurality of macroblocks, said decoding means being operative to output quantized data from said decoded data stream; means for performing an inverse quantization operation on said quantized data; means for performing an inverse discrete cosine transform (IDCT) of the output from said means for performing an inverse quantization operation; means for extracting header information from said quantized data from said decoding means and for performing a prediction operation according to predetermined criteria, wherein said prediction operation defines a total computation load based on cumulative computation loads determined from header information macroblock-type, motion vector magnitude, motion vector count, non-zero discrete cosine transformer coefficients and a coded block pattern (CBP); means for generating a motion compensated reference value based on said quantized data from said decoding means; and means for adding the output from said IDCT means and said motion generating means to produce motion compensated pictures.