Adaptive data compression system
US5319682A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1991 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Dec 9, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/42
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An adaptive data compression system comprises an encoder 2 which responds to input characters by producing output codewords according to a stored encoding map or table of characters and codewords, and an adapter 4, 5 which adapts the encoding map or table in accordance with the input characters so as to increase the compression ratio between the input characters and output codewords. An optimizer 5 monitors the performance of the system and accordingly varies adaptation of the encoding map or table by the adapter 4 so as to optimize performance of the system. Performance of the system is preferably monitored in terms of the computational loading of the processor and the compression ratio it achieves. A decoder 7 subsequently decodes the codewords by reference to a corresponding decoding map or table which is adapted 9, 10 in accordance with the output data from the decoder and in accordance with variations in the adaptation process in the encoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.