Video compression device
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United States of America Patent
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May 2, 2017
Issued Date -
N/A
app pub date -
Apr 30, 2014
filing date -
May 13, 2013
priority date (Note) -
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Abstract
With a video compression device configured to compress one pixel per cycle, a predictive pixel generation unit generates predictive pixel values of a plurality of predictive modes defined assuming local decode pixels read from predetermined positions of a line memory as upper reference pixels and an input original image pixel positioned on the left side of a pixel to be compressed as a left reference pixel for the pixel to be compressed. A predictive mode determination unit calculates a predictive error in a unit based on differential values between the pixel value to be compressed and the predictive pixel value, and selects a minimum predictive mode. A DPCM unit generates a minimum differential value between the minimum predictive pixel value and the pixel to be compressed assuming local decode pixels as upper reference pixels and a local decode pixel value one cycle before as a left reference pixel.
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