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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2008, Vol. 9 Issue (4): 457-463    DOI: 10.1631/jzus.A071585
Electrical & Electronic Engineering     
Efficient video downscaling transcoder from MPEG-2 to H.264
Xiang-wen WANG, Jun SUN, Rong XIE, Song-yu YU
Shanghai Key Lab. of Digital Media Processing & Transmissions, Institute of Image Communication & Information Processing, Shanghai Jiao Tong University, Shanghai 200240, China
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Abstract  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.

Key words： Video transcoding      Mode decision      Edge direction analysis     
Received: 08 November 2007     
CLC:  TN919.8  
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Xiang-wen WANG
Jun SUN
Rong XIE
Song-yu YU
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Xiang-wen WANG, Jun SUN, Rong XIE, Song-yu YU. Efficient video downscaling transcoder from MPEG-2 to H.264. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(4): 457-463.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A071585     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2008/V9/I4/457

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