Image information encoding method and encoder, and image information decoding method and decoder
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United States of America Patent
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May 7, 2013
Grant Date -
Sep 27, 2012
app pub date -
Jun 5, 2012
filing date -
Nov 30, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
An image decoding method includes decoding encoded image data to generate a decoded image signal including a luma signal and a chroma signal. The method further includes scaling, when a reference field is a bottom field while a current field is a top field for motion estimation and when the decoded image signal is in a format in which the number of chroma pixels is vertically different from the number of luma pixels, a chroma motion vector of the chroma signal by mv/2−¼, where mv is a vertical component in a luma motion vector of the luma signal. The method also includes performing motion compensation of the decoded image signal using the scaled chroma motion vector.
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