Image encoding device, image decoding device and program
AssigneeNippon Hoso Kyokai
InventorsAtsuro ICHIGAYA, Shunsuke IWAMURA, Shimpei NEMOTO, Kazuhisa IGUCHI
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Abstract
An image encoding device (1) includes a motion compensation predictor (109) configured to generate a prediction image corresponding to a target image by performing motion compensation prediction using a plurality of reference images, and an evaluator (111) configured to evaluate prediction accuracy of the prediction image for each image portion including one or more pixels by calculating a degree of similarity between the plurality of reference images for each image portion.
Claims8
An image encoding device for encoding a target image in a block unit, the image encoding device comprising:
- a predictor circuitry configured to generate a block of a prediction image corresponding to a block of the target image by performing bi-directional prediction using a plurality of reference images;
- an evaluator circuitry configured to calculate an evaluation value related to sum of absolute differences between the plurality of reference images for each image portion that is a smaller unit than the block,
- an inverse quantizer/inverse transformer circuitry configured to restore a prediction residual by performing an inverse quantization and an inverse transform of quantized transform coefficients;
- and
- a combiner circuitry configured to reconstruct the block of the target image by combining the restored prediction residual input from the inverse quantizer/inverse transformer with the block of the prediction image in a pixel unit, wherein
- the evaluation value is used for generating a target to combine of the combiner in the image portion.
An image decoding device for decoding a target image in a block unit, the image decoding device comprising:
- a predictor circuitry configured to generate a block of a prediction image corresponding to a block of the target image by performing bi-directional prediction using a plurality of reference images;
- an evaluator circuitry configured to calculate an evaluation value related to sum of absolute differences between the plurality of reference images for each image portion that is a smaller unit than the block,
- an inverse quantizer/inverse transformer circuitry configured to restore a prediction residual by performing an inverse quantization and an inverse transform of quantized transform coefficients;
- and
- a combiner circuitry configured to reconstruct the block of the target image by combining the restored prediction residual input from the inverse quantizer/inverse transformer with the block of the prediction image in a pixel unit, wherein
- the evaluation value is used for generating a target to combine of the combiner in the image portion.
An image decoding method for decoding a target image in a block unit, the image decoding method comprising:
- a step of generating a block of a prediction image corresponding to a block of the target image by performing bi-directional prediction using a plurality of reference images;
- a calculating step of calculating an evaluation value related to sum of absolute differences between the plurality of reference images for each image portion that is a smaller unit than the block;
- a step of restoring a prediction residual by performing an inverse quantization and an inverse transform of quantized transform coefficients;
- and
- a combine step of reconstructing the block of the target image by combining the restored prediction residual obtained by the step of restoring a prediction residual with the prediction image in a pixel unit, wherein
- the evaluation value is used for generating a target to combine at the combine step in the image portion.
Dependencies are inferred from the claim text.