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US 10,375,396 B2Granted
Coefficient coding harmonization in HEVC
AssigneeSony Corporation
InventorsJun Xu, Ali Tabatabai
Life of this patent
Estimating the term…
Abstract
Coefficient coding for transform units (TUs) during high efficiency video coding (HEVC), and similar standards, toward simplifying design while enhancing efficiency. Elements of the invention include coefficient coding for TUs with up-right diagonal scans being modified, and selectively applying multi-level significance map coding.
Claims8
An encoding device, comprising:
- circuitry configured to:
- apply, as a condition that diagonal scan is applied to a first transform block and a second transform block of a plurality of transform bocks, the diagonal scan to the plurality of transform blocks of a plurality of variable block sizes,
- wherein the first transform block is of a first block size of the plurality of variable block sizes and the second transform block is of a second block size of the plurality of variable block sizes, and
- wherein 4×4 sub-blocks of both the first transform block and the second transform block are diagonally scanned, and the diagonal scan is applied inside each of the 4×4 sub-blocks;
- and
- apply same multi-level significance map encoding to the first transform block of the first block size and the second transform block of the second block size.
3 more elements
A method, comprising:
- applying, as a condition that diagonal scan is applied to a first transform block and a second transform block of a plurality of transform bocks, the diagonal scan to the plurality of transform blocks of a plurality of variable block sizes,
- wherein the first transform block is of a first block size of the plurality of variable block sizes and the second transform block is of a second block size of the plurality of variable block sizes, and
- wherein 4×4 sub-blocks of both the first transform block and the second transform block are diagonally scanned, and the diagonal scan is applied inside each of the 4×4 sub-blocks;
- and
- applying same multi-level significance map encoding to the first transform block of the first block size and the second transform block of the second block size.
2 more elements
Dependencies are inferred from the claim text.