Apparatus and method for real time data compressor
US4926482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1987 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Jun 26, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/3053
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
High speed computing apparatus for performing real time data compression of analog voice data or digital data to be transmitted over a data link. The incoming data stream is divided into blocks of digital data and the blocks are subdivided into digital samples or elements to be compressed. Each sample is analyzed individually to determine its estimated variance and the marginal return to be gained by alloting the sample one or more of the bits to be employed to define the block of digital data. The bits are assigned samples having the highest estimated variance factor so that an optimum allocation of bits to individual samples is achieved with variable ratio data compression. The allocated bits are employed to encode the samples during real time data compression and transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.