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SCALABLE VIDEO ENCODING METHOD AND APPARATUS USING IMAGE UP-SAMPLING IN CONSIDERATION OF PHASE-SHIFT AND SCALABLE VIDEO DECODING METHOD AND APPARATUS
SCALABLE VIDEO ENCODING METHOD AND APPARATUS USING IMAGE UP-SAMPLING IN CONSIDERATION OF PHASE-SHIFT AND SCALABLE VIDEO DECODING METHOD AND APPARATUS
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机译:考虑相移的利用图像上采样的可伸缩视频编码方法和装置以及可伸缩视频解码方法和装置
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摘要
Provided is a method of determining an up-sampling filter to accurately interpolate a sample value for each sampling position according to an up-sampling ratio for scalable video encoding and decoding. An up-sampling method for scalable video encoding includes determining a phase shift between a pixel of a low resolution image and a pixel of a high resolution image based on a scaling factor between the high resolution image and the low resolution image; selecting at least one filter coefficient set corresponding to the determined phase shift from filter coefficient data comprising filter coefficient sets corresponding to phase shifts; generating the high resolution image by performing filtering on the low resolution image by using the selected at least one filter coefficient set; and generating an improvement layer bitstream comprising high resolution encoding information generated by performing encoding on the high resolution image and up-sampling filter information indicating the determined phase shift.
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