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A Complexity Scalable H.264 Decoder with Downsizing Capability for Mobile Devices

Authors
Nam, Hyeong-MinJeong, Jae-YunByun, Keun-YungKim, Jong-OkKo, Sung-Jea
Issue Date
5월-2010
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords
H.264/AVC decoder; decoding complexity scalability; downscaling; motion compensation; inverse transform
Citation
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, v.56, no.2, pp.1025 - 1033
Indexed
SCIE
SCOPUS
Journal Title
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS
Volume
56
Number
2
Start Page
1025
End Page
1033
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/116509
DOI
10.1109/TCE.2010.5506035
ISSN
0098-3063
Abstract
It is significantly challenging to playback H.264 compressed video in real time on mobile devices with limited computing power. In this paper, we propose a complexity scalable H.264/AVC decoding algorithm with a downsizing capability, which can offer the complexity scalability by directly decoding the compressed video at a downsized resolution. In the proposed method, the predicted and residual signal can be generated in a downsized resolution by modifying the motion compensation (MC) and the inverse discrete cosine transform (IDCT). As a result, the computational decoding load can be significantly reduced. Moreover, the proposed H.264 decoder can achieve the complexity scalability by adaptively discarding (or simplifying) redundant computations which have larger complexity but less effect on the video quality. Experimental results show that the decoding complexity can be reduced up to 43%, as compared to the conventional H.264/AVC decoder, while maintaining the acceptable video quality(1).
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