PATENT CLAIM ANALYSIS

Application Number: 16381253
Application Type: Utility
Filing Date: 2019-04
Publication Date: 2019-08
Patent Classification: ["375", "240080"]

Abstract:
An image coding method for coding an image on a block-by-block basis, includes: selecting, for each of a plurality of sub-blocks included in a coding-target block and each including a plurality of coefficients, a context for performing arithmetic coding on a parameter indicating a coding-target coefficient included in the sub-block from a context set corresponding to the sub-block, based on at least one reference coefficient located around the coding-target coefficient, the coding-target block being a transform unit; and performing arithmetic coding on the parameter indicating the coding-target coefficient using probability information about the selected context, wherein, in the selecting, the context is selected from the context set, the context set corresponding to a sum of (i) a value indicating a position in a horizontal direction of the sub-block in the coding-target block and (ii) a value indicating a position in a vertical direction of the sub-block in the coding-target block.

Claim (Index 24):
An image decoding apparatus which decodes an image coded on a block-by-block basis, the image decoding apparatus comprising:\n a context selecting unit configured to select, for each of a plurality of 4\u00d74 sub-blocks included in a decoding-target block and each including a plurality of coefficients, a context for performing arithmetic decoding on a parameter indicating a decoding-target coefficient included in the 4\u00d74 sub-block from a context set corresponding to the 4\u00d74 sub-block, based on at least one reference coefficient located around the decoding-target coefficient, the decoding-target block being a transform unit; and an arithmetic decoder which performs arithmetic decoding on the parameter indicating the decoding-target coefficient using probability information about the selected context, wherein, the context selecting unit is configured to:\n select the context from a first context set based on the at least one reference coefficient when a position of the 4\u00d74 sub-block in the decoding-target block is a leftmost position in a horizontal direction and an uppermost position in a vertical direction; and \n select the context from a second context set based on the at least one reference coefficient when a position of the 4\u00d74 sub-block in the decoding-target block is not a leftmost position in a horizontal direction and an uppermost position in a vertical direction, the second context set being different from the first context set.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 100.0
- Lexical Diversity: 2.51515
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15698955', '15051895', '13721328', '15050837', '13788162']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5306163376740263
- 35 USC 102 Novelty (BERT): 0.5756866057913042
- Combined Prediction Score: 0.535123364485754
- Mean Citation Score: 435.862088
- Max Citation Score: 460.66318
- Similarity Product: 422.61443434146406

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test