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Title: Offset-adaptive quantization in DCT-based low-bitrate video coding
Authors: Yuan, Y
Feng, D
Zhong, Y
Keywords: Discrete cosine transforms
Image sequences
Mobile communication
Quantisation (signal)
Video coding
Visual communication
Issue Date: 2004
Publisher: IEEE
Source: 2004 IEEE 59th Vehicular Technology Conference, 2004 : VTC 2004-Spring, 17-19 May 2004, v. 5, p. 2739-2743 How to cite?
Abstract: Band effect is one of the most annoying visual artifacts in digital video, and is especially obvious in low-bitrate applications, such as mobile video. This paper discusses the cause of band effect and proposes an improved quantization method, which can reduce band effect effectively in DCT-based video coding. This offset-adaptive quantization method adjusts the quantization results of every block according to adjacent blocks. The method can improve video subjective quality with ignorable additional computing cost. The method need not change standard bitstream syntax, so it can easily be applied to many DCT-based video codecs. Experimental results on practical video sequences prove that the method is valuable.
ISBN: 0-7803-8255-2
ISSN: 1550-2252
DOI: 10.1109/VETECS.2004.1391419
Appears in Collections:Conference Paper

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