Picture coding device, picture coding method, and picture coding program, and picture decoding device, picture decoding method, and picture decoding program
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United States of America Patent
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Mar 13, 2018
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N/A
app pub date -
Jul 14, 2017
filing date -
Mar 26, 2012
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Abstract
In a picture coding device, a significant coefficient information coding controller 706 and an arithmetic encoder 701 code significant difference coefficient information indicating that a difference coefficient value is not zero and significant for each of the difference coefficients in the partial region of the coding target. A difference coefficient value coding controller 707 and the arithmetic encoder 701 code difference coefficient values when significant difference coefficient information is significant for each of pixels in the partial region of the coding target. The significant coefficient information coding controller 706 decides a context for coding the significant difference coefficient information in the partial region of the coding target based on information indicating significance of the difference coefficient in the coded partial region.
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