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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Oct 1, 2013
Grant Date -
Apr 25, 2013
app pub date -
Dec 12, 2012
filing date -
Nov 30, 2001
priority date (Note) -
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Abstract
An image processing method includes decoding encoded image data to generate a decoded image signal including a luma signal and a chroma signal. The method further includes detecting a condition that a reference field has a different parity from a current field and that the number of chroma pixels is vertically different from the number of luma pixels. The method further includes shifting a phase of the chroma signal in the reference field in a vertical plus direction according a value of a motion vector in a vertical direction under the detected condition so that the reference field will coincide in phase of the chroma signal with a current field. The method also includes performing a motion compensation of the decoded image signal using the reference field.
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