Journal of Beijing University of Posts and Telecommunications

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JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2011, Vol. 34 ›› Issue (s1): 95-99.doi: 10.13190/jbupt.2011s1.95.changk

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ContextAdaptive Mode Decision Algorithm for Scalable  Video Coding with Quality Scalability

    

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  • Online:2011-10-28 Published:2011-10-28
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Abstract:

To reduce the computational complexity of quality scalable video coding (SVC)， a three steps included fast mode decision algorithm is proposed. In the first step， skip modes which require little computational complexity are checked; afterwards， candidate modes are selectively searched according to the interlayer correlation; finally， the rest unchecked modes are calculated. If the minimal RateDistortion (RD) cost obtained in the first or the second step is smaller than the predefined threshold， early termination is trigged. Experiment demonstrate that， compared with the exhaustive search method， 459%808% encoding time can be saved by the proposed algorithm. The Peak Signal to Noise Ratio (PSNR) reduction is 025dB at most and the bit rate increment is 062% at most.

Key words: H264, scalable video coding, interlayer prediction, mode decision

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