Multipurpose Hardware for Digital Coding of Audio Signals
- 1 November 1978
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Communications
- Vol. 26 (11) , 1785-1788
- https://doi.org/10.1109/TCOM.1978.1094009
Abstract
We describe an adaptive coding system capable of representing audio frequency signals in a wide variety of digital code formats. To provide adaptive quantization, the step size is adjusted by voltage controlled amplifiers operating with analog control signals. Sine wave signal-to-noise ratio measurements demonstrate important relationships among the main code classifications: pcm, apcm, dpcm, adpcm. The multipurpose coder has proved a useful laboratory aid in the design of special purpose coders. After adjustment and evaluation of parameters using the multipurpose coder one proceeds to an economical, specialized design.Keywords
This publication has 3 references indexed in Scilit:
- A Robust Adaptive QuantizerIEEE Transactions on Communications, 1975
- Theory of an Adaptive QuantizerIEEE Transactions on Communications, 1974
- Adaptive Quantization with a One-Word MemoryThe Journal of the Acoustical Society of America, 1973