Moving image coding apparatus, moving image coding method, and program therefor
AssigneeCanon Kabushiki Kaisha
InventorHiroaki Endo
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Abstract
A moving image coding apparatus which acquires moving image data represented by one of a plurality of different bit depths, converts the acquired moving image data to moving image data having the lowest bit depth among the plurality of different bit depths, determines a prediction mode relating to intra-picture prediction on the basis of the moving image data of the converted bit depth, and prediction-codes the acquired moving image data represented by one of the plurality of different bit depths in accordance with the determined prediction mode.
Claims14
A moving image coding apparatus for prediction-coding input moving image data by using at least intra-picture prediction, the moving image coding apparatus being arranged to deal with moving image data having a plurality of different bit depths,
- the moving image coding apparatus comprising:
- an acquisition unit configured to acquire moving image data represented by at least one of the plurality of different bit depths;
- a conversion unit configured to convert the moving image data acquired by the acquisition unit to moving image data having a lowest bit depth among the plurality of different bit depths;
- a determination unit configured to determine a prediction mode relating to the intra-picture prediction on the basis of the moving image data of the bit depth converted by the conversion unit;
- and
- a coding unit configured to prediction-code the moving image data represented by the one of the plurality of different bit depths, which is acquired by the acquisition unit, in accordance with the prediction mode determined by the determination unit,
- wherein the determination unit determines the prediction mode of the moving image data represented by the lowest bit depth on the basis of evaluation values of a plurality of prediction modes, and
- wherein in a case where the bit depth of the moving image data acquired by the acquisition unit is the lowest bit depth, the conversion unit outputs the acquired moving image data.
A moving image coding method for prediction-coding input moving image data by using at least intra-picture prediction, the moving image coding method being arranged to deal with moving image data having a plurality of different bit depths,
- the moving image coding method comprising:
- acquiring and storing in a memory moving image data represented by at least any one of the plurality of different bit depths;
- converting the moving image data stored in the memory to moving image data having a lowest bit depth among the plurality of different bit depths;
- determining a prediction mode relating to the intra-picture prediction based on the moving image data of the bit depth converted in the converting;
- and
- prediction-coding the moving image data represented by the one of the plurality of different bit depths, which is stored in the memory in the acquiring, in accordance with the prediction mode determined in the determining
- wherein in the determining, the prediction mode of the moving image data represented by the lowest bit depth is determined on the basis of evaluation values of a plurality of prediction modes, and
- wherein in the converting, in a case where the bit depth of the moving image data acquired in the acquiring is the lowest bit depth, the acquired moving image data is outputted.
A computer-readable non-transitory recording medium having stored thereon a program for controlling a computer to execute the moving image coding method for prediction-coding input moving image data by using at least intra-picture prediction, the moving image coding method being arranged to deal with moving image data having a plurality of different bit depths, the moving image coding method comprising:
- acquiring and storing in a memory moving image data represented by at least any one of the plurality of different bit depths;
- converting the moving image data stored in the memory to moving image data having a lowest bit depth among the plurality of different bit depths;
- determining a prediction mode relating to the intra-picture prediction based on the moving image data of the bit depth converted in the converting;
- and
- prediction-coding the moving image data represented by the one of the plurality of different bit depths, which is stored in the memory in the acquiring, in accordance with the prediction mode determined in the determining,
- wherein in the determining, the prediction mode of the moving image data represented by the lowest bit depth is determined on the basis of evaluation values of a plurality of prediction modes, and
- wherein in the converting, in a case where the bit depth of the moving image data acquired in the acquiring is the lowest bit depth, the acquired moving image data is outputted.
Dependencies are inferred from the claim text.