Multiband Video Signal Coding with H.264/AVC, MPEG-4 Studio Profile and Motion JPEG 2000 and Associated Signal Format
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概要
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Multispectral imaging, which has been common in satellite image acquisition to a certain extent, is recently being used in visual imaging systems such as printers, digital/analog cameras, still/video cameras, projectors and even displays. The reason is the variety of functionalities it provides. As the amount of image data is proportional to the number of bands, efficient compression of such data sets, particularly for video data, is necessary. This paper provides a basic investigation of multispectral video coding, such as inter-band decorrelation, visible/invisible separation and non-linear signal transform prior to encoding. We use a six-band video sequence (48bit/pel) as the test data. The video/image codecs of Motion JPEG 2000, MPEG-4 Studio Profile, as well as the newly developed standard H.264/AVC, are compared in a coding experiment. Based on the results, following observations were revealed:◊ At higher bit rate, full-resolution formats and intra-based codecs give better quality.◊ At lower bit rate, sub-sampled formats, particularly with H.264/AVC codec, outperforms others. ◊ ntra-based codecs are more sensitive to inter-band decorrelation process (i.e., use of visible/invisible separation or not). ◊ Visible/invisible separation results in both gain and loss, depending on the characteristic of the test sequence. When principal component analysis gives poor power concentration, it is better to use visible/invisible separated format, and vice versa. ◊ Generally visible/invisible separation yields lower ΔEab* quality.
- 一般社団法人 画像電子学会の論文
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