MOVING PICTURE DECODING METHOD, MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING APPARATUS, MOVING PICTURE CODING APPARATUS, AND MOVING PICTURE CODING AND DECODING APPARATUS
First Claim
1. A moving picture decoding method comprising:
- analyzing a coded moving picture bitstream to obtain difference data of a target block among a plurality of blocks of two or more sizes;
performing intra prediction on the target block to calculate values of predicted samples of the target block; and
calculating reconstructed samples of the target block by adding the difference data and the values of the predicted samples,wherein in said performing of intra prediction,validity of each of reference samples that are located one of immediately above and immediately to the left of the target block is determined, and when the reference samples include both a valid reference sample and an invalid reference sample, the intra prediction is performed using the valid reference sample, andan intra-predicted reference sample is determined as a valid reference sample, and an inter-predicted reference sample is determined as an invalid reference sample.
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Abstract
A moving picture decoding method according to the present invention includes: performing intra prediction on a target block to calculate values of predicted samples of the target block; and calculating reconstructed samples of the target block by adding difference data and the values of the predicted samples of the target block, wherein in the performing of intra prediction, validity of each of reference samples that are located one of immediately above and immediately to the left of the target block is determined, and when the reference samples include both a valid reference sample and an invalid reference sample, the intra prediction is performed using the valid reference sample, and an intra-predicted reference sample is determined as a valid reference sample, and an inter-predicted reference sample is determined as an invalid reference sample.
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Citations
19 Claims
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1. A moving picture decoding method comprising:
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analyzing a coded moving picture bitstream to obtain difference data of a target block among a plurality of blocks of two or more sizes; performing intra prediction on the target block to calculate values of predicted samples of the target block; and calculating reconstructed samples of the target block by adding the difference data and the values of the predicted samples, wherein in said performing of intra prediction, validity of each of reference samples that are located one of immediately above and immediately to the left of the target block is determined, and when the reference samples include both a valid reference sample and an invalid reference sample, the intra prediction is performed using the valid reference sample, and an intra-predicted reference sample is determined as a valid reference sample, and an inter-predicted reference sample is determined as an invalid reference sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A moving picture coding method comprising:
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dividing an original picture into a plurality of blocks of two or more sizes; performing intra prediction on a target block among the blocks to calculate values of predicted samples; calculating difference data that represents a difference between an original image in the target block and the values of the predicted samples; and coding the difference data to generate a coded moving picture bitstream, wherein in said performing of intra prediction, validity of each of reference samples that are located one of immediately above and immediately to the left of the target block is determined, and when the reference samples include both a valid reference sample and an invalid reference sample, the intra prediction is performed using the valid reference sample, and an intra-predicted reference sample is determined as a valid reference sample, and an inter-predicted reference sample is determined as an invalid reference sample.
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17. A moving picture decoding apparatus comprising:
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an analyzing unit configured to analyze a coded moving picture bitstream to obtain difference data of a target block among a plurality of blocks of two or more sizes; an intra predicting unit configured to perform intra prediction on the target block to calculate values of predicted samples of the target block; and a reconstructed sample calculating unit configured to calculate reconstructed samples of the target block by adding the difference data and the values of the predicted samples, wherein said intra predicting unit is configured to determine validity of each of reference samples that are located one of immediately above and immediately to the left of the target block, and perform, when the reference samples include both a valid reference sample and an invalid reference sample, the intra prediction using the valid reference sample, and determine an intra-predicted reference sample as a valid reference sample, and determine an inter-predicted reference sample as an invalid reference sample.
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18. A moving picture coding apparatus comprising:
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a dividing unit configured to divide an original picture into a plurality of blocks of two or more sizes; an intra predicting unit configured to perform intra prediction on a target block among the blocks to calculate values of predicted samples; a difference data calculating unit configured to calculate difference data that represents a difference between an original image in the target block and the values of the predicted samples; and a coding unit configured to code the difference data to generate a coded moving picture bitstream, wherein said intra predicting unit is configured to determine validity of each of reference samples that are located one of immediately above and immediately to the left of the target block, and perform, when the reference samples include both a valid reference sample and an invalid reference sample, the intra prediction using the valid reference sample, and determine an intra-predicted reference sample as a valid reference sample, and determine an inter-predicted reference sample as an invalid reference sample. - View Dependent Claims (19)
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Specification