Nearly lossless content-dependent low-power DCT design for mobile video applications
Journal
IEEE International Conference on Multimedia and Expo, ICME 2005
Journal Volume
2005
Pages
1238 - 1241
Date Issued
2005
Author(s)
Abstract
This paper proposes a practical content-dependent low-power DCT design with tolerable quality drop. Low-power issue has become more and more important, especially for portable devices. Unfortunately, low-power design always brings in significant quality drop at the same time. This work not only achieves ultra lowpower dissipation but also remains to lerable quality drop (about 0.1dB) in most cases. The proposed architecture is based on distributed arithmetic architecture [1] and combined with more reliable PPA classification algorithm[2]. Itcan accurately control bit-level calculation and avoid unnecessary calculation to savepower. This characteristic is powerful and very useful in video encoder systems, since coefficients after DCT and Q become zero with high probability. This part of power can be saved without causing undesired quality drop. © 2005 IEEE.
Event(s)
IEEE International Conference on Multimedia and Expo, ICME 2005
Other Subjects
Mobile video applications; Portable devices; Quality drop; Video encoder systems; Computer architecture; Content based retrieval; Cosine transforms; Distributed computer systems; Multimedia systems; Probability; Video signal processing; Mobile telecommunication systems
Type
conference paper