US 9,538,205 B2
Arithmetic decoding device, image decoding apparatus, arithmetic coding device, and image coding apparatusGeneral
US 9,538,205 B2
Arithmetic decoding device, image decoding apparatus, arithmetic coding device, and image coding apparatus
Tech Center:
2400 Networking, Multiplexing, Cable, and Security
Examiner:
Leron Beck
Art Unit:
2487 Recording and Compression
Agent:
Inventors:
Tomohiro Ikai; Takeshi Tsukuba
Assignee:
Priority:
06/01/12
Filed:
05/24/13
Granted:
01/03/17
Expiration:
11/13/33
Abstract
In order to simplify hardware and improve coding efficiency, an adjacent sub-block coefficient presence/absence context deriving unit 124c derives context indexes as three-stage values according to a position of a process target transform coefficient in a process target sub-block in a case where a sub-block coefficient presence/absence flag is 0 in a right adjacent sub-block or a lower adjacent sub-block.
Cooperative Patent Classification (CPC)
H04H04N19/176H04N