PATENT CLAIM ANALYSIS

Application Number: 15958214
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-08
Patent Classification: ["375", "240120"]

Abstract:
A prediction direction difference calculating unit derives a prediction direction difference in intra prediction modes of a plurality of reference blocks used for an intra prediction processing of a block to be coded. A most probable mode determining unit and a coding tree selecting unit determine a most probable mode as an intra prediction mode candidate of the block to be coded based on the intra prediction modes of the reference blocks used for deriving the prediction direction difference and the prediction direction difference, and creates a coding tree assigned with a bit stream having a shorter code length than other prediction modes for the determined most probable mode. A variable length coding unit codes information for specifying an intra prediction mode of the block to be coded according to the coding tree.

Claim (Index 1):
A picture decoding device which decodes information for specifying an intra prediction mode in units of block from a bitstream and decodes a picture signal by use of information for specifying a decoded intra prediction mode, the picture decoding device comprising:\n an intra prediction mode storing unit configured to store intra prediction modes of decoded blocks; a prediction direction difference deriving unit configured to derive intra prediction modes of a plurality of reference blocks used for an intra prediction processing of a block to be decoded from the intra prediction mode storing unit, and derive a prediction direction difference indicating a degree of difference in prediction directions of the derived intra prediction modes, and when the prediction direction difference is larger than a predetermined upper limit, replace a value of the prediction direction difference with the upper limit; a decoding tree creating unit configured to determine most probable prediction modes as intra prediction mode candidates of the block to be decoded based on the intra prediction modes of the reference blocks and the prediction direction difference, and create a decoding tree assigned with a bitstream having a shorter code length than other prediction modes for the determined most probable prediction modes; and a decoding unit configured to decode information for specifying an intra prediction mode of the block to be decoded according to the decoding tree, wherein: when the intra prediction modes of the reference blocks are not the same, the decoding tree creating unit specifies intra prediction mode of left neighboring block to the block to be decoded as first most probable prediction mode, and intra prediction mode of upper neighboring block to be decoded as second most probable prediction mode; when the intra prediction modes of the reference blocks are the same and are not an average value mode, the decoding tree creating unit specifies the same intra prediction mode as first most probable mode and specifies two intra prediction modes closest to the same intra prediction mode as second and third most probable prediction modes; and when the intra prediction modes of the reference blocks are the same and are the average value mode, the decoding tree creating unit specifies the average value mode and a vertical direction prediction mode as most probable prediction modes.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 91.0
- Lexical Diversity: 2.40351
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14091018', '15958271', '15807353', '15958298', '15152998']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6283498379989303
- 35 USC 102 Novelty (BERT): 0.6862394971893772
- Combined Prediction Score: 0.634138803917975
- Mean Citation Score: 617.1811919999999
- Max Citation Score: 707.5804
- Similarity Product: 703.5070465787411

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