Delta modulation method and system for signal compression
US4314105A · kind A · utility
22Cited by
3References
8Claims
0Family size
Inventor
Key dates
| Filing date | Oct 2, 1979 |
| Grant date | Feb 2, 1982 |
| Priority date | — |
| Expiry date | Oct 2, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This delta modulation system uses the differences between three successive samples of a waveform (the i-1, i, and i+1) such that the number of bits per digitization is reduced from four to two. The value vi of the ith sample is calculated by the equation v.sub.i =v.sub.i -1+f(.DELTA..sub.i-1, .DELTA..sub.i), and f is a special function defined by 16 values stored in a read-only memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.