Run-length encoding/decoding video signals using scan patterns explicitly encoded into bitstreams
US5721822A · kind A · utility
33Cited by
2References
69Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Video signals are run-length encoded using a scan pattern and encoded video signals are run-length decoded using the scan pattern, where the scan pattern is explicitly encoded into the encoded bitstream. In a preferred embodiment, the scan pattern is generated by applying a constrained sorting rule to energy measures corresponding to the video signals to be encoded. The scan pattern used for encoding can be changed as often as needed where each new scan pattern is explicitly encoded into the bitstream for use in decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.