A 8.32 kb/s embedded wideband speech coding candidate for ITU-t EV-VBR standardization
نویسندگان
چکیده
This paper describes a 8–32 kb/s embedded speech codec submitted as a candidate for the ITU-T Embedded Variable Bit Rate (EV-VBR) standardization. The coder is built upon a 2-stage coding structure consisting of embedded ACELP coding from 8 to 16kb/s and embedded TCX coding at 24 and 32 kb/s. The coder is designed to support bandwidth scalability (narrow band and wide band signal) and bit-rate scalability (8~32 kb/s). The output bit-stream produced by the coder is scalable, consisting of core layer and four enhancement layers at 8 kb/s, 12 kb/s, 16 kb/s, 24 kb/s and 32 kb/s individually. ITU-T’s test results showed that this coder has good performance compared with reference codec.
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