| CPC H04N 19/11 (2014.11) [H04N 19/124 (2014.11); H04N 19/18 (2014.11); H04N 19/593 (2014.11); H04N 19/597 (2014.11)] | 10 Claims |
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1. A video coding device having functions of intra-prediction and inter-prediction, comprising:
a memory storing software instructions, and
one or more processors configured to execute the software instructions to
transform prediction error signals of a block to be processed to generate transform coefficients;
quantize the transform coefficient to generate a quantized transform coefficient;
arithmetic-code the quantized transform coefficient;
local-decode the quantized transform coefficients;
select an optimal prediction mode for the block to be processed from a plurality of available prediction modes after evaluation of these modes;
calculate a first value representing energy of the prediction error signals of the block to be processed; and
eliminate specified transform coefficients when at least one of a width and a height of the block to be processed exceeds a predetermined value and calculate a second value representing energy of the transform coefficients other than the eliminated transform coefficients, wherein
the one or more processors are configured to execute the software instructions to decide not to select the available prediction mode as the optimal prediction mode of the block, without executing quantizing, arithmetic-coding and local decoding, in a case where the second value is smaller than a predetermined degree as compared to the first value.
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