Bi-directional data stream decompression
US5963716A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1996 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Dec 2, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Described herein is a method of decompressing a compressed data stream from a data buffer. The compressed data stream is of a type having a plurality of compressed segments in a normal sequence, wherein each segment has a control element that specifies the length or number of following data elements. The method includes a step of reading the segments in their normal sequence from the data buffer. After reading a particular segment, its control element and data elements are reversed in order, and then rewritten to the data buffer in the original location of the segment. After reading and re-writing a plurality of the segments, the direction of reading can be reversed. That is, the segments can be read in reverse sequence. Because of the re-writing step, however, control elements will be read before data elements, thus enabling decompression even in the reverse direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.