Multimedia: an SIMD – based efficient 4x4 2 d transform method

  • Authors:

  • Sang-Jun Yu;Chae-Bong Sohn;Seoung-Jun Oh;Chang-Beom Ahn

  • Affiliations:

  • VIA-Multimedia Center, Kwangwoon University, Seoul, Korea;VIA-Multimedia Center, Kwangwoon University, Seoul, Korea;VIA-Multimedia Center, Kwangwoon University, Seoul, Korea;VIA-Multimedia Center, Kwangwoon University, Seoul, Korea

  • Venue:
  • ICCSA'05 Proceedings of the 2005 international conference on Computational Science and its Applications - Volume Part I
  • Year:
  • 2005

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Abstract

In this paper, we present an efficient scheme for the computation of 4x4 integer transform using SIMD instructions, which can be applied to discrete cosine transform (DCT) as well as Hadamard transform (HT) in MPEG-4 AVC/H.264, a video compression scheme for DMB. Even though it is designed for 64-bits SIMD operations, our method can easily be extended to 128-bits SIMD operations. On a 2.4G (B) Intel Pentium IV system, the proposed method can obtain 4.34x and 2.6x better performances for DCT and HT, respectively, than a 4x4 integer transform technique in an H.264 reference codec using 64-bits SIMD operations. We can still have 6.77x and 3.98x better performances using 128-bits SIMD operations, respectively.