Moving image encoding device
AssigneesNTT Electronics Corporation, Nippon Telegraph and Telephone Corporation
InventorsAkiko SHIMAZAKI, Ken NAKAMURA, Takayuki ONISHI, Takashi SANO
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Abstract
A computation unit subtracts a prediction image from an input image. An orthogonal transformation unit applies orthogonal transformation to an output of the computation unit. A quantization unit quantizes an output of the orthogonal transformation unit. An encoding unit encodes an output of the quantization unit. A prediction mode determination unit determines a prediction mode from the input image. The prediction mode is different according to types of an I-picture, a P-picture and a B-picture.
Claims5
1-5. (canceled)
A moving image encoding device generating a predictive image by using intra-prediction and encoding a difference between an input image and the predictive image for each block, comprising:
- a flat area determination parameter calculator evaluating a flatness of each block of the input image to calculate a flat are determination parameter;
- an intra-prediction mode offset value calculator calculating an intra-prediction mode offset value from the flat are determination parameter of an adjacent block used in the intra-prediction for each intra-prediction mode;
- an evaluation value calculator calculating an evaluation value from the difference between the input image and the predictive image for each intra-prediction mode;
- and a prediction mode determination unit determining an optimal intra-prediction mode based on a sum of the evaluation value and the intra-prediction mode offset value.
A moving image encoding device generating a predictive image by using intra-prediction or inter-prediction and encoding a difference between an input image and the predictive image for each block, comprising:
- a flat area determination parameter calculator evaluating a flatness of each block of the input image to calculate a flat area determination parameter;
- an evaluation value calculator calculating an inter evaluation value and an intra evaluation value from the difference between the input image and the predictive image;
- an intra-offset value setting unit setting a larger intra-offset value as the flat area determination parameter of an adjacent block used in the intra-prediction is larger;
- and
- a prediction mode determination unit determining a prediction mode based on a magnitude of the inter evaluation value and a sum of the intra evaluation value and the intra offset value.
Dependencies are inferred from the claim text.