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23 June 2003 Encoding strategies for realizing MPEG-4 universal scalable video coding
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Proceedings Volume 5150, Visual Communications and Image Processing 2003; (2003)
Event: Visual Communications and Image Processing 2003, 2003, Lugano, Switzerland
The universal scalability, which integrates different types of scalabilities and consequently provides a large scaling range for each parameter, is of high interests to the applications in the current heterogeneous surroundings. In our previous work, an MPEG-4 universal scalable codec basing on a layered path-tree structure [1,2] has been addressed, in which a video layer and the coding order of two consecutive layers are interpreted as a node and the parent-to-child relationship in a path-tree, respectively. Since individual video layers can be coded separately using different coding tools in MPEG-4 simple scalable profile (SSP) [3] and fine-granularity scalable profile (FGS) [4], the proposed scalable video coder may include spatial, temporal and SNR enhancements simultaneously. In this paper, based on some visual observations we first address some encoding strategies for the universal scalable coding, including spatial-temporal quality tradeoff, region sensitivity and frequency weighting. Applying these strategies will take the content characteristics into consideration and can determine better coding parameters. As a result, bit allocation becomes more sensitive to those perceptually important parts of spatial, temporal and SNR enhancements. Next, a batch encoding process is conducted to generate universal scalable streams automatically, in which all the abovementioned encoding strategies are fully integrated together. The preliminary experiments show that better visual quality can be obtained within the full bitrate range.
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Yi-Shin Tung, Jin-Hau Kuo, Ja-Ling Wu, Wen-Huang Cheng, and Ting-Jian Pan "Encoding strategies for realizing MPEG-4 universal scalable video coding", Proc. SPIE 5150, Visual Communications and Image Processing 2003, (23 June 2003);

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