Intra-coded fields for bi-directional frames
US7664177B2 · kind B2 · utility
22Cited by
173References
23Claims
0Family size
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Key dates
| Filing date | Sep 15, 2004 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encoder/decoder uses intra-coded B-fields [“BI-fields”]. For example, rather than encoding many of the macroblocks in a field as intra macroblocks at a scene change, an encoder can choose to encode the entire field as intra. Encoding an entire field as a BI-field allows increased coding efficiency through reduced coding overhead at macroblock level, and without intra-frame dependency, the BI-field can still be dropped if appropriate in low-bitrate applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.