A candidate proposal for a 3GPP adaptive multi-rate wideband speech codec
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چکیده
This paper describes an adaptive multi-rate wideband (AMR-WB) speech codcc proposcd for the GSM system and also for the evolving Third Generation (3G) mobile speech services. The speech codec is based on SB-CELP (Splitband-Code-Excited Linear Prediction) with five modes operating bit rates from 24kbit/s down to S.lkbit/s. The respective channel coding schemes are based on RSC (Recursive Systematic Code) and UEP (Unequal Error Protection). Both, source and channel codec are designed as homogenous as possible to guarantee robust transmission on current and future mobile radio channels.
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تاریخ انتشار 2001