Methods and apparatus for multiple stage video decoding
US7181070B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2002 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | May 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques for performing the processing of blocks of video in multiple stages. Each stage is executed for blocks of data in the frame that need to go through that stage, based on the coding type, before moving to the next stage. This order of execution allows blocks of data to be processed in a nonsequential order, unless the blocks need to go through the same processing stages. Multiple processing elements (PEs) operating in SIMD mode executing the same task and operating on different blocks of data may be utilized, avoiding idle times for the PEs. In another aspect, inverse scan and dequantization operations for blocks of data are merged in a single procedure operating on multiple PEs operating in SIMD mode. This procedure makes efficient use of the multiple PEs and speeds up processing by combining two operations, inverse scan (reordering) and dequantization, which load the execution units differently. The reordering loads mainly the load and store units of the PEs, while the dequantization loads mainly other units. By combining the inverse scan and dequantization in an efficient VLIW packing performance, processing gain is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.