LSF Quantization to Enhance the Frame Erasure Robustness of CELP Type Coders in Packet Networks
نویسنده
چکیده
quantizers were designed with the primary concerns of bit-rate and complexity, less attention was paid to error propagation. In this paper, we consider the erasure performance of LSF differential scalar quantizer (DSQ) and compare it with the interframe coding method embedded in the standard G723.1 of the ITU. Our results show that with only 5% extra bit-rate, DSQ algorithm is much more robust to frame erasures and improvements in terms of spectral distortion and Enhanced modified bark spectral distortion (EMBSD) tests under various packet loss conditions are obtained.
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