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Rate-distortion optimization for fast hierarchical B-picture transcoding | IEEE Conference Publication | IEEE Xplore

Rate-distortion optimization for fast hierarchical B-picture transcoding


Abstract:

An efficient rate-distortion (R-D) optimal method for transcoding hierarchical B-pictures is proposed in this paper. A new R-D model is presented for fast transcoding hie...Show More

Abstract:

An efficient rate-distortion (R-D) optimal method for transcoding hierarchical B-pictures is proposed in this paper. A new R-D model is presented for fast transcoding hierarchical B-pictures in DCT domain, in which the total R-D optimization problem is adjusted to motion R-D optimization and texture R-D optimization separately. Accordingly, a mechanism for fast mode decision is proposed to enable the mode and motion adjustment in hierarchical B-picture DCT-domain transcoding. Experimental results show that the proposed transcoding scheme with the new R-D optimization can achieve 4-dB average PNSR improvement at low bit-rate, and similar performance at high bit-rate, compared to the transcoding by reusing the input motion information. Moreover, as the transcoding is performed in DCT domain, it is fast and simple enough for many real applications.
Date of Conference: 21-24 May 2006
Date Added to IEEE Xplore: 11 September 2006
Print ISBN:0-7803-9389-9

ISSN Information:

Conference Location: Kos, Greece

References

References is not available for this document.