Efficient fixed-length block compression and decompression
US6668015B1 · kind B1 · utility
16Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1999 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Jun 1, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Compression and decompression apparatus and methods for producing fixed-length compressed data blocks with variable-length compression are described. The compression system receives an N-bit word from a data block and determines the variable compression length for the word. A bit counter keeps track of the number of bits remaining and determines if sufficient bits have been used to ensure that the fixed-length compressed data block will be filled. If so, the compressed word is output. If not, prior to output the compressed word is padded with an appropriate number of bits, which may be null bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.