Tandem transcoding without distortion accumulation for vector quantization

Tandem transcoding without distortion accumulation for vector quantization

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 qu...

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Veröffentlicht in:IEEE transactions on communications 1992-02, Vol.40 (2), p.397-403
Hauptverfasser: Ayanoglu, E., Gitlin, R.D.
Format: Artikel
Sprache:eng
Schlagworte:
ANSI standards
Applied sciences
B-ISDN
Codecs
Coding, codes
Encoding
Exact sciences and technology
Image coding
Information, signal and communications theory
Phase change materials
Pulse modulation
Signal and communications theory
Speech coding
Telecommunications and information theory
Transcoding
Vector quantization
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Zusammenfassung: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.< >
ISSN:0090-6778
1558-0857
DOI:10.1109/26.129201