Adaptive prediction differential-PCM transmission method and circuit using filtering by sub-bands and spectral analysis
US4319082A · kind A · utility
11Cited by
4References
8Claims
0Family size
Inventors
Key dates
| Filing date | Dec 14, 1979 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Dec 14, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/667
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Adaptive differential PCM system using both adaptive quantization and adaptive prediction. The adaptive prediction is carried out in adjacent frequency bands on as many signals as are obtained by weighting the quantized signal by coefficients obtained by spectral analysis in the bands of the quantized signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.