Last coefficient coding for adaptive transform based video compression
US12192487B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Oct 5, 2022 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Jan 11, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/192
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Coding of the last coded coefficient position is performed by basing the coding of the y coordinate of the position of the last coded coefficient on knowledge of the size of the partial transform used to generate a block of coefficients from a block of video pixels. This enables a context adaptive coding of the last coded coefficient parameter to be performed much more efficiently.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.