Coding quantized transform coefficients as occur in image compression includes, for a subset of coefficient amplitude values coding by a first method corresponding to each amplitude of the subset, events of a run of zero or more zero-valued coefficients ending in the single non-zero amplitude, coding by a second method events of a run of zero or more zero-valued coefficients ending in any single non-zero amplitude not in the subset, and coding by a third method the amplitude values of the concatenation of the non-zero amplitude not in the subset. The coding methods produce variable length codewords. The method is suitable for series that have scattered non-zero-valued coefficients.
申请公布号
WO2007092661(A3)
申请公布日期
2007.12.21
申请号
WO2007US60693
申请日期
2007.01.18
申请人
CISCO TECHNOLOGY, INC.;CHEN, WEN-HSIUNG;TOEBES, JOHN, A.