Abstract
It would be desirable, in terms of energy conservation, to use a low complexity approximate algorithm to do all IDCT computation in an MPEG-2 decoder. However, there is a significant quality penalty associated with this approach that may not always be acceptable. A practical algorithmic method is presented here for achieving quality/energy tradeoff for a hardware 2-D IDCT in an MPEG-2 decoder. By allowing multiple algorithms to run on the same IDCT hardware, multiple quality/energy tradeoff modes can be supported, and the quality that results when an approximate algorithm is used can be increased. For example, by simply using an approximate algorithm for all B frame IDCT processing, while using a conventional algorithm for I and P frames, it will be shown that 23% energy reduction can be achieved compared to using the conventional algorithm exclusively. This significant energy reduction can be achieved with a quality tradeoff of less than 0.5 dB average PSNR.
| Original language | English (US) |
|---|---|
| Title of host publication | IEEE Workshop on Signal Processing Systems, SiPS: Design and Implementation |
| Publisher | IEEE |
| Pages | 90-99 |
| Number of pages | 10 |
| State | Published - 2000 |
| Event | 2000 IEEE Workshop on Signal Processing Systems (SIPS 2000) - Lafayette, LA, USA Duration: Oct 11 2000 → Oct 13 2000 |
Other
| Other | 2000 IEEE Workshop on Signal Processing Systems (SIPS 2000) |
|---|---|
| City | Lafayette, LA, USA |
| Period | 10/11/00 → 10/13/00 |
ASJC Scopus subject areas
- General Engineering