Abstract
Transcoding algorithms that eliminate distortion accumulation due to tandem transcodings between memoryless, finite-state, and predictive vector quantization and pulse code modulation (PCM) are presented. The algorithms can be implemented using table lookups for memoryless and finite-state vector quantization, whereas predictive vector quantization requires online calculations. Computer simulations indicate a 6 dB improvement in the case of 16 kb/s predictive vector quantizers, 48 kb/s PCM, and four tandems for speech.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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