METHOD AND APPARATUS FOR CLASSIFYING IMPORTANCE OF ENCODED FRAMES IN A DIGITAL COMMUNICATIONS SYSTEM
摘要
A method of classifying importance of encoded frames in a digital communications system by calculating an energy difference between outputs of a frame decoding with an error detection and said frame decoding without said error detection. Said frames are encoded in accordance with an Algebraic Code Excited Linear Predictive (ACELP). Said method comprises the following steps: first decoding (106) a frame in an ACELP decoder with a Bad Frame Indication (BFI) function enabled; second decoding (112) said frame in said ACELP decoder with said BFI function disabled; calculating (116) an energy difference between said first and said second decoding output. Said calculated energy difference is a measure of said importance.
申请公布号
WO2005089178(A2)
申请公布日期
2005.09.29
申请号
WO2005US07844
申请日期
2005.03.10
申请人
MOTOROLA, INC., A CORPORATION OF THE STATE OF DELAWARE;BLOMBERG, HANS CHRISTIAN,;HILDING SVENDSEN, PETER WILLIAM,
发明人
BLOMBERG, HANS CHRISTIAN,;HILDING SVENDSEN, PETER WILLIAM,