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US 6,788,382 B2Granted
Moving picture coding control apparatus, and moving picture coding control data generating apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMasashi Mori, Kunio Nakaoka, Hiroaki Sakai, Yoshinari Sugegaya
Life of this patent
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Abstract
In a moving picture coding control apparatus, optimum relationships between local features and local coding parameters that are necessary to optimize ranges of global coding parameters are stored, for each optimum range of global coding parameters capable of reproducing a moving picture that reflects characteristics of display units which display moving picture data and opinions from a plurality of users. Optimum local coding parameters are sequentially selected for global coding parameters and local features by using the store data. Moving picture data is coded based on the selected local coding parameters.
Claims9
A moving picture coding control apparatus comprising:
- a coding control data storing unit in which optimum ranges of global coding parameters are set corresponding to each of a plurality of characteristics of display units which display moving pictures, and which stores a plurality of optimum sets of relationships between local features and local coding parameters for each optimum range of the set global coding parameters;
- a moving picture input unit to which moving picture data is input;
- a moving picture feature extracting unit that analyzes moving picture data that has been input to the moving picture input unit, and extracts local features of a moving picture;
- an optimum local coding parameter control unit to which display unit characteristic information that shows characteristics of display units and global coding parameters is input, which selects optimum ranges of global coding parameters corresponding to the input display unit characteristic information from the coding control data storing unit, selects relationships corresponding to the input global coding parameters from the plurality of sets of relationships corresponding to the selected optimum ranges of global coding parameters, selects local coding parameters corresponding to the local features extracted by the moving picture feature extracting unit by using the selected relationships, and outputs the selected local coding parameters;
- a moving picture coding unit that encodes the moving picture data input from the moving picture input unit based on the local coding parameters output from the optimum local coding parameter control unit and the input global coding parameters;
- and
- a moving picture coding output unit that outputs the moving picture data coded by the moving picture coding unit.
4 more elements
A moving picture coding control database generating apparatus comprising:
- a moving picture input unit to which sample moving picture data is input;
- a moving picture feature extracting unit that analyzes a sample moving picture data that has been input to the moving picture input unit, and extracts local features of a moving picture for each block of each frame;
- a local coding parameter control unit that obtains local coding parameters for each block of each frame based on the extracted local features;
- a moving picture coding unit to which different global coding parameters are input each time when the coding of sample moving picture data has once been finished, and which encodes the sample moving picture data from the moving picture input unit by using the input global coding parameters and the local coding parameters from the local coding parameter control unit;
- a moving picture decoding unit that decodes coded data from the moving picture coding unit;
- a display unit that displays coded data from the moving picture decoding unit;
- a moving picture data analyzing unit that obtains a plurality of moving pictures by variously changing local features from the moving picture feature extracting unit, local coding parameters from the local coding parameter control unit, and global coding parameters of the sample moving picture data, executes monitoring of the obtained plurality of moving pictures by a plurality of viewers thereby to obtain evaluation information from each viewer, executes a statistical processing using users' evaluation information according to probability distributions thereby to obtain optimum ranges of global coding parameters, obtains a quantitative relationship that shows certainty between local features and local coding parameters that are included in a decoded moving picture that is regarded as ideal from a result of the monitoring by the plurality of viewers, based on the viewers' evaluation information, the local features and the local coding parameters, for each block of each frame, and obtains optimum sets of relationships between the local features and the local coding parameters based on the quantitative relationship that shows this certainty, for each global coding parameter;
- and
- a coding control data storing unit that stores optimum ranges of global coding parameters obtained by the moving picture data analyzing unit and optimum relationships between the local features and the local coding parameters.
6 more elements
Dependencies are inferred from the claim text.