Joint transform-domain-translated algorithm for MPEG-2 to H.264 downscaling intraframe transcoding

K. Y. Liao, Jar-Ferr Yang, Y. K. Tu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A joint transform-domain-translated (JTT) algorithm, which can achieve fast MPEG-2 to H.264 downscaling intraframe transcoding, is proposed. The proposed JTT algorithm effectively combines the 8×8 inverse discrete cosine transform, the 2:1 downscaler and the 4×4 integer transform without involving any complex pixel processes in the spatial domain. The authors also suggest a fast realisation of the JTT algorithm to further reduce its computation. The proposed JTT-transcoding method saves a lot of computation compared with some of the existing approaches in transcoding processing. Experimental results show that the proposed JTT algorithm effectively converts the MPEG-2 intraframe to H.264 intraframe to achieve almost identical PSNR performance compared with the pixel-domain decode-downsize-encode transcoder, which involves MPEG-2 decoding, spatial-domain downsizing and H.264 encoding processes.

Original languageEnglish
Pages (from-to)125-132
Number of pages8
JournalIET Signal Processing
Volume2
Issue number2
DOIs
Publication statusPublished - 2008 Jun 10

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Mathematical transformations
Pixels
Discrete cosine transforms
Decoding
Processing

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

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abstract = "A joint transform-domain-translated (JTT) algorithm, which can achieve fast MPEG-2 to H.264 downscaling intraframe transcoding, is proposed. The proposed JTT algorithm effectively combines the 8×8 inverse discrete cosine transform, the 2:1 downscaler and the 4×4 integer transform without involving any complex pixel processes in the spatial domain. The authors also suggest a fast realisation of the JTT algorithm to further reduce its computation. The proposed JTT-transcoding method saves a lot of computation compared with some of the existing approaches in transcoding processing. Experimental results show that the proposed JTT algorithm effectively converts the MPEG-2 intraframe to H.264 intraframe to achieve almost identical PSNR performance compared with the pixel-domain decode-downsize-encode transcoder, which involves MPEG-2 decoding, spatial-domain downsizing and H.264 encoding processes.",
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Joint transform-domain-translated algorithm for MPEG-2 to H.264 downscaling intraframe transcoding. / Liao, K. Y.; Yang, Jar-Ferr; Tu, Y. K.

In: IET Signal Processing, Vol. 2, No. 2, 10.06.2008, p. 125-132.

Research output: Contribution to journalArticle

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