A complexity scalable H.264 decoder with downsizing capability for mobile devices

Hyeong Min Nam, Jae Yun Jeong, Keun Yung Byun, Jong Ok Kim, Sung Jea Ko

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


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.

Original languageEnglish
Article number5506035
Pages (from-to)1025-1033
Number of pages9
JournalIEEE Transactions on Consumer Electronics
Issue number2
Publication statusPublished - 2010 May

Bibliographical note

Funding Information:
1This research was supported by Seoul Future Contents Convergence (SFCC) Cluster established by Seoul R&BD Program (No. 10570) and by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (No. 2009-0080547).


  • H.264/AVC decoder
  • decoding complexity scalability
  • downscaling
  • inverse transform
  • motion compensation

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


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