An adaptive wavelet-based deblocking algorithm for MPEG-4 codec

Trieu-Kien Truong; Shi-Huang Chen; Rong-Yi Jhang

doi:10.1117/12.624367

16 September 2005 An adaptive wavelet-based deblocking algorithm for MPEG-4 codec

Trieu-Kien Truong, Shi-Huang Chen, Rong-Yi Jhang

Proceedings Volume 5909, Applications of Digital Image Processing XXVIII; 59092B (2005) https://doi.org/10.1117/12.624367
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

This paper proposed an adaptive wavelet-based deblocking algorithm for MPEG-4 video coding standard. The novelty of this method is that the deblocking filter uses a wavelet-based threshold to detect and analyze artifacts on coded block boundaries. This threshold value is based on the difference between the wavelet transform coefficients of image blocks and the coefficients of the entire image. Therefore, the threshold value is made adaptive to different images and characteristics of blocking artifacts. Then one can attenuate those artifacts by applying a selected filter based on the above threshold value. It is shown in this paper that the proposed method is robust, fast, and works remarkably well for MPEG-4 codec at low bit rates. Another advantage of the new method is that it retains sharp features in the decoded frames since it only removes artifacts. Experimental results show that the proposed method can achieve a significantly improved visual quality and increase the PSNR in the decoded video frame.

Citation Download Citation

Trieu-Kien Truong, Shi-Huang Chen, and Rong-Yi Jhang "An adaptive wavelet-based deblocking algorithm for MPEG-4 codec", Proc. SPIE 5909, Applications of Digital Image Processing XXVIII, 59092B (16 September 2005); https://doi.org/10.1117/12.624367

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