Video-signal layered coding and decoding methods, apparatuses, and programs with spatial-resolution enhancement
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United States of America Patent
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Jan 4, 2011
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app pub date -
Jun 14, 2007
filing date -
Jun 15, 2006
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Abstract
An input video signal is encoded at a plurality of coding layers exhibiting different spatial resolutions. The input video signal is spatially scaled down to a resolution-lowered video signal that exhibits a resolution lower than the video signal. The resolution-lowered video signal is encoded by using a quantization parameter, with a decoding procedure, thus obtaining first coded data and a decoded signal. The decoded signal is spatially scaled up through a high-resolution procedure for controlling high-frequency components estimation depending on the quantization parameter, thus obtaining a high-resolution scaled-up video signal. The input video signal is encoded through inter-spatial resolution prediction using the high-resolution scaled-up video signal as a predictive signal, thus obtaining second coded data that exhibits a resolution higher than the resolution-lowered video signal.
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