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International Journal of Electronics Engineering Research. ISSN 0975-6450 Volume 9, Number 7 (2017) pp. 1027-1031
Transform (DTT) coefficients for video transcoding applications. The organization of this paper is as follows. In section 2, we describe the transform domain IT-to-DCT conversion. In section 3 the fast conversion algorithm & its utility is described.
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![Fast Conversion of H264/AVC Integer Transform Coefficients Fast Conversion of H264/AVC Integer Transform Coefficients](https://pdfprof.com/Listes/17/12308-17ijeerv9n7_09.pdf.pdf.jpg)
© Research India Publications
http://www.ripublication.comFast Conversion of H.264/AVC Integer Transform
Coefficients into DTT Coefficients
Muhammed Yusuf Khan
1 and Tanveer Hasan2 Abstr act In this paper we propose a fast method to convert H.264/AVC Integer Transform (IT) coefficients to Discrete Tchebichef Transform (DTT) coefficients for applications in video transcoding. We derive the transform kernel matrix for converting, in the transform domain, four IT coefficient blocks into one 8x8 DTT block of coefficients. Using the symmetry of this matrix, we show that the proposed conversion method requires lesser computations than its equivalent in the pixel domain.Keywords:
Transform conversion, video transcoding.
1. INTRODUCTION
It is observed that about half of the bitrate can be saved by using H.264 [1]. When a ne w standard is adopted, it gives rise to interoperability problems with older systems. In the case of H.264, interoperability with MEPG-2 systems is significant. It is achieved through video transcoding for conversion between different standards [2].MPEG 2 video codecs use the 8
x8DCT to produce transform coefficients, H.264 use
the 4x4 IT. The Discrete Tchebichef Transform (DTT) [3] which is derived from Or thonormal Tchebichef Ploynomials has similar energy compaction properties likeDCT. In paper [4] the c
onve rsion of DTT coefficients to IT coefficients is compared with DCT coefficients to IT coefficients conversion. The fast conversion of H.264/AVC Integer Transform Coefficients into DCT coefficients is computed byMarques et al[5].
This paper goes step further by developing fast algorithm for converting H.264/AVC Integer Transform (IT) coefficients to Discrete Tchebichef 1028Transform (DTT) coefficients for video transcoding applications. The organization of this paper is as follows. In section 2, we describe the transform domain IT-to-DCT conversion. In section 3 the fast conversion algorithm & its utility is described.