Variable length coding for clustered transform coefficients in video compression
US7680349B2 · kind B2 · utility
10Cited by
90References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2006 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Jan 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Coding quantized transform coefficients as occur in image compression combines a position identifying method to identify the relative position of clusters of consecutive non-zero-valued coefficients, an amplitude event identifying method to identify amplitude events in the clusters of non-zero-valued coefficients, and a coding method to code the position events, amplitude events, and signs of the amplitudes in the clusters. The method is particularly applicable to a series of quantized transform coefficients where clusters are likely to occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.