Method and apparatus for predictive coding
US4853780A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1988 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Feb 11, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/503
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In transmitting a residual signal determined by the difference between an input signal and a predictive signal, a comparative signal based on the input signal is applied to a plurality of predictors having different respective predictive functions or coefficients, the resulting predictive output signals from the predictors, respectively, are compared with the comparative signal to provide respective difference signals, and the predictor corresponding to the smallest of the difference signals with a predetermined time delay, for example, the next preceding sampling of the input signal, is employed as the source of the predictive signal to be subtracted from the input signal for determining the transmitted residual signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.