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CLC number: TN919.8

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Received: 2007-11-08

Revision Accepted: 2008-01-15

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.4 P.457-463


Efficient video downscaling transcoder from MPEG-2 to H.264

Author(s):  Xiang-wen WANG, Jun SUN, Rong XIE, Song-yu YU

Affiliation(s):  Shanghai Key Lab. of Digital Media Processing & Transmissions, Institute of Image Communication & Information Processing, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding email(s):   wxw21st@sjtu.edu.cn, junSun@sjtu.edu.cn, Xierong@sjtu.edu.cn, Syyu@cdtv.org.cn

Key Words:  Video transcoding, Mode decision, Edge direction analysis

Xiang-wen WANG, Jun SUN, Rong XIE, Song-yu YU. Efficient video downscaling transcoder from MPEG-2 to H.264[J]. Journal of Zhejiang University Science A, 2008, 9(4): 457-463.

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A1 - Xiang-wen WANG
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A1 - Rong XIE
A1 - Song-yu YU
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DOI - 10.1631/jzus.A071585

The new H.264 video coding standard achieves significantly higher compression performance than MPEG-2. As the MPEG-2 is popular in digital TV, DVD, etc., bandwidth or memory space can be saved by transcoding those streams into H.264 in these applications. Unfortunately, the huge complexity keeps transcoding from being widely used in practical applications. This paper proposes an efficient transcoding architecture with a smart downscaling decoder and a fast mode decision algorithm. Using the proposed architecture, huge buffering memory space is saved and the transcoding complexity is reduced. Performance of the proposed fast mode decision algorithm is validated by experiments.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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