Discrete one dimensional signal processing apparatus and method using energy spreading coding
US5913186A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1996 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Mar 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/667
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
PONS comprises a transform coder and decoder for discrete time electrical signals, in particular acoustic signals. The PONS coder utilizes an integer coefficient transform coder which is not frequency based, which requires almost exclusively fast integer arithmetic, and which spreads incoming signal energy nearly as evenly as possible among coefficients in the transform domain. The PONS coder also has the property that the magnitudes of transform domain coefficients vary by less than about an order of magnitude, so that the PONS coder dispenses completely with time-varying bit allocation. PONS uses only the quantization step to achieve significant compression. Energy spreading also permits reasonably accurate signal reconstruction when significant numbers of transform coefficients are lost or corrupted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.