Parallel histogram calculation with application to palette table derivation
US11120289B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2019 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Feb 21, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems, apparatuses, and methods for performing parallel histogram calculation with application to palette table derivation are disclosed. An encoder calculates a first histogram for a first portion of pixel component value bits of a block of pixels. Then, the encoder selects a first number of the highest pixel count bins from the first histogram. Also, the encoder calculates a second histogram for a second portion of pixel component value bits of the block. The encoder selects a second number of the highest pixel count bins from the second histogram. A third histogram is calculated from the concatenation of bits assigned to the first and second number of bins, and the highest pixel count bins are selected from the third histogram. A palette table is derived based on these highest pixel count bins selected from the third histogram, and the block of pixels is encoded using the palette table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.