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Received: 2005-12-02

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.100 P.89~94

http://doi.org/10.1631/jzus.2006.AS0089


A new all-zero 4×4 block determination rule for integer transform and quantization in AVS-M encoder


Author(s):  Liu Dong-Hua, Chen Yi-Qiang

Affiliation(s):  Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China

Corresponding email(s):   dhliu@shict.cn

Key Words:  AVS-M, Integer DCT transform, Quantization, All-zero 4×, 4 block, PSNR


Liu Dong-Hua, Chen Yi-Qiang. A new all-zero 4×4 block determination rule for integer transform and quantization in AVS-M encoder[J]. Journal of Zhejiang University Science A, 2006, 7(100): 89~94.

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author="Liu Dong-Hua, Chen Yi-Qiang",
journal="Journal of Zhejiang University Science A",
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doi="10.1631/jzus.2006.AS0089"
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%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.AS0089

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T1 - A new all-zero 4×4 block determination rule for integer transform and quantization in AVS-M encoder
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A1 - Chen Yi-Qiang
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.AS0089


Abstract: 
A new all-zero block determination rule was used to reduce the complexity of the AVS-M encoder. It reuses the sum of absolute difference of 4×4 block obtained from motion estimation or intra prediction as parameters so that the determination threshold need to be computed only once when quantization parameter (QP) is invariable for given video sequence. This method avoids a lot of computation for transform, quantization, inverse transform, inverse quantization and block reconstruction. Simulation results showed that it can save about 20%~50% computation without any video quality degradation.

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

Reference

[1] AVS Workgroup, 2005. Information Technology—Advanced Coding of Audio and Video—Part 7: Mobile Video.

[2] Kim, G.Y., Mon, Y.H., Kim, J.H., 2004. An early detection of all-zero DCT blocks in H.264. Proc. IEEE Int. Conf. Image Processing, p.453-456.

[3] Pao, I.M., Sun, M.T., 1999. Modeling DCT coefficients for fast video coding. IEEE Trans. Circuit Syst. Video Technol., 9:608-616.

[4] Wang, Y., Zhou, Y., Yang, H., 2004. Early detection method of all-zero integer transform coefficients. IEEE Trans. Consumer Electron., 50(3):923-928.

[5] Zheng, Y., Gao, W., Zhao, D.B., Ma, S.W., Lu, H.Q., 2004. A Method for Low Complexity 16 Bit 4×4 Integer Transform and Quantization. AVS_M1331.

[6] Zhou, X., Yu, Z., Yu, S., 1998. Method for detecting all-zero DCT coefficients ahead of discrete cosine transform and quantization. Electro. Lett., 34(19):1839-1840.

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