Picture coding method, picture decoding method, picture coding apparatus, picture decoding apparatus, and program thereof
AssigneePanasonic Corporation
InventorShinya Kadono
Life of this patent
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Abstract
A picture coding method of the present invention codes a picture signal and a ratio of the number of luminance pixels and the number of chrominance pixels for the picture signal, and then one coding method out of at least two coding methods is selected depending on the ratio, and subsequently a data related to the picture size is coded in accordance with the selected coding method. Here the data related to the picture size indicates a size of the picture corresponding to the picture signal or an output area which being a pixel area to be outputted in decoding in a whole pixel area coded in the picture signal coding.
Claims22
A picture coding method comprising:
- coding a picture signal;
- coding a ratio of the number of luminance pixels to the number of chrominance pixels for the picture signal;
- selecting one coding method out of at least two coding methods depending on the ratio;
- and
- coding a data related to a picture size in accordance with the selected coding method.
A picture decoding method comprising:
- decoding a coded picture signal;
- decoding a ratio of the number of luminance pixels to the number of the chrominance pixels for the decoded picture signal;
- selecting one decoding method out of at least two decoding methods depending on the ratio;
- and
- decoding a data related to a picture size in accordance with the selected decoding method.
A picture coding apparatus comprising:
- a picture coding unit operable to code a picture signal;
- a ratio coding unit operable to code a ratio of the number of luminance pixels to the number of chrominance pixels for the picture signal;
- a selecting unit operable to select one coding method out of at least two coding methods depending on the ratio;
- and
- a data coding unit operable to code a data related to a picture size in accordance with the selected coding unit.
A picture decoding apparatus comprising:
- a picture decoding unit operable to decode a coded picture signal;
- a ratio decoding unit operable to decode a ratio of the number of luminance pixels to the number of the chrominance pixels for the decoded picture signal;
- a selecting unit operable to select one decoding method out of at least two decoding methods depending on the ratio;
- and
- a data decoding unit operable to decode a data related to a picture size in accordance with the selected decoding method.
A picture coding program causing a computer to execute:
- coding a picture signal;
- coding a ratio of the number of luminance pixels to the number of chrominance pixels for the picture signal;
- selecting one coding method out of at least two coding methods depending on the ratio;
- and
- coding a data related to a picture size in accordance with the selected coding method.
A picture decoding program causing a computer to execute:
- decoding a coded picture signal;
- decoding a ratio of the number of luminance pixels to the number of chrominance pixels for the decoded picture signal;
- selecting one decoding method out of at least two decoding methods depending on the ratio;
- and
- decoding a data related to a picture size in accordance with the selected decoding method.
Dependencies are inferred from the claim text.