High quality adaptive predictive coding of speech
- 24 March 2005
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 3, 303-306
- https://doi.org/10.1109/icassp.1978.1170539
Abstract
We report on the results of research to code speech at 16 kbps under the condition that the quality of the transmitted speech be equal to that of the original. Some of the original speech had been corrupted by noise and distortions typical of long distance telephone lines. The rigorous requirements of this work led to a new outlook on adaptive predictive coding. We have found that the pitch predictor is not useful on balance and should be eliminated, and that the residual should be quantized with no clipping and encoded using a variable-length code. A single coding scheme seems to be adequate for all speech and all conditions. In addition, the adaptive predictive coding system has been modified to include a noise spectral shaping filter that effectively eliminates the perception of background granular noise. Author(s) Berouti, M. Bolt Beranek and Newman, Inc., Cambridge, Mass. Makhoul, J.Keywords
This publication has 7 references indexed in Scilit:
- Improved quantizer for adaptive predictive coding of speech signals at low bit ratesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- High quality 16 kb/s voice transmissionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Pitch-Adaptive DPCM Coding of Speech With Two-Bit Quantization and Fixed Spectrum PredictionBell System Technical Journal, 1977
- The Residual Encoder--An Improved ADPCM System for Speech DigitizationIEEE Transactions on Communications, 1975
- Linear prediction: A tutorial reviewProceedings of the IEEE, 1975
- Entropy-Coded Adaptive Differential Pulse-Code Modulation (DPCM) for SpeechIEEE Transactions on Communications, 1974
- A Method for the Construction of Minimum-Redundancy CodesProceedings of the IRE, 1952