PATENT CLAIM ANALYSIS

Application Number: 16171961
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-02
Patent Classification: ["375", "240130"]

Abstract:
The image decoding method includes determining a context for use in a current block to be processed, from among a plurality of contexts, wherein in the determining: the context is determined under a condition that control parameters of a left block and an upper block are used, when the signal type is a first type; and the context is determined under a third condition that the control parameter of the upper block is not used and a hierarchical depth of a data unit to which the control parameter of the current block belongs is used, when the signal type is a third type, and the third type is one or more of (i) “merge_flag”, (ii) “ref_idx_l0” or “ref_idx_l1”, (iii) “inter_pred_flag”, (iv) “mvd_l0” or “mvd_l1”, (v) “intra_chroma_pred_mode”, (vi) “cbf_luma”, and (vii) “cbf_cb” or “cbf_cr”.

Claim (Index 19):
A coding and decoding method for coding a first control parameter for controlling coding of a first image and for decoding a second control parameter for controlling decoding of a second image, the coding and decoding method comprising:\n determining a first context for a first current block in the first image, from among a plurality of first contexts; and performing arithmetic coding on the first control parameter for the first current block, using the determined first context to generate a first bitstream corresponding to the first current block, wherein the determining of a first context further includes:\n determining a first signal type under which the first control parameter for the first current block is classified; \n determining the first context by using both of first control parameters for a first left block and a first upper block, when the first signal type is a first type, the first left block being a neighboring block to the left of the first current block, and the first upper block being a neighboring block on top of the first current block; \n determining the first context by using a predetermined first fixed value, without using any of the first control parameters for the first left block and the first upper block, when the first signal type is a second type different from the first type; and \n determining the first context by using a hierarchical depth of a first data unit to which the first control parameter for the first current block belongs, without using both of the first control parameters for the first left block and the first upper block, when the first signal type is a third type different from the first type and the second type regardless of a coding mode used to code the first current block, \n wherein one of a first split flag and a first skip flag is classified under the first type, the first split flag indicating whether or not the first current block is partitioned into a plurality of blocks, and the first skip flag indicating whether or not the first current block is to be skipped, wherein a first residual flag is classified under the second type, the residual flag indicating whether or not luma coefficient data and chroma coefficient data are included in the first current block, wherein a first luma coefficient flag and a first chrominance coefficient flag are classified under the third type, the first luma coefficient flag indicating whether or not the first current block includes a non-zero luma coefficient, and the first chrominance coefficient flag indicating whether or not the first current block includes a non-zero chrominance coefficient, wherein a first number of first contexts for the first luma coefficient flag is different from a second number of first contexts for the first chrominance coefficient flag, wherein the coding and decoding method further comprising:\n determining a second context for a second current block in the second image, from among a plurality of second contexts; and \n performing arithmetic decoding on a second bitstream corresponding to the second current block, using the determined second context to obtain the second control parameter for the second current block, \n wherein the determining of a second context further includes:\n determining a second signal type under which the second control parameter for the second current block is classified; \n determining the second context by using both of second control parameters for a second left block and a second upper block, when the second signal type is a fourth type, the second left block being a neighboring block to the left of the second current block, and the second upper block being a neighboring block on top of the second current block; \n determining the second context by using a predetermined second fixed value, without using any of the second control parameters for the second left block and the second upper block, when the second signal type is a fifth type different from the fourth type; and \n determining the second context by using a hierarchical depth of a second data unit to which the second control parameter for the second current block belongs, without using both of the second control parameters for the second left block and the second upper block, when the second signal type is a sixth type different from the fourth type and the fifth type regardless of a decoding mode used to decode the second current block, \n wherein one of a second split flag and a second skip flag is classified under the fourth type, the second split flag indicating whether or not the second current block is partitioned into a plurality of blocks, and the second skip flag indicating whether or not the second current block is to be skipped, wherein a second residual flag is classified under the fifth type, the second residual flag indicating whether or not luma coefficient data and chroma coefficient data are included in the second current block, wherein a second luma coefficient flag and a second chrominance coefficient flag are classified under the sixth type, the second luma coefficient flag indicating whether or not the second current block includes a non-zero luma coefficient, and the second chrominance coefficient flag indicating whether or not the second current block includes a non-zero chrominance coefficient, and wherein a third number of second contexts for the second luma coefficient flag is different from a fourth number of second contexts for the second chrominance coefficient flag.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 97.0
- Lexical Diversity: 2.35065
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15797155', '15244336', '13544061', '14837546', '13535527']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6416021002877976
- 35 USC 102 Novelty (BERT): 0.6365131388427078
- Combined Prediction Score: 0.6410932041432887
- Mean Citation Score: 588.986792
- Max Citation Score: 606.3458
- Similarity Product: 588.1214707832337

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