Image encoding apparatus for encoding flags indicating removal times

• US 10,158,860 B2
• Filed: 12/11/2017
• Issued: 12/18/2018
• Est. Priority Date: 04/23/2012
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Sun Patent Trust
• Inventors: Toma, Tadamasa, Nishi, Takahiro, Shibahara, Youji, Sasai, Hisao, Sugio, Toshiyasu, Tanikawa, Kyoko, Matsunobu, Toru, Terada, Kengo
• Primary Examiner(s): Geroleo, Francis
• Application Number:
  US15/837,477
• Publication Number:
  US 20180103256A1
• Time in Patent Office: 372 Days
• CPC Class Codes: G06T 9/00 Image coding bandwidth or redundancy reduction for static pictures H04N1/41; coding or decoding of static colour picture signals H04N1/64; methods or arrangements for coding, decoding, compressing or decompressing digital video signals H04N19/00
• CPC Class Codes: H04N 19/13 Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/15 by monitoring actual compressed data size at the memory before deciding storage at the transmission buffer
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/423 characterised by memory arrangements H04N19/433 takes precedence
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards

Abstract

An encoding apparatus of encoding units included in a picture is provided. The encoding apparatus generates a first flag indicating whether a removal time of encoded data from a buffer by a hypothetical decoder is set per unit. When the removal time is set per unit, a second flag is generated which indicates whether an interval between removal times of the units is constant. When the second flag indicates that the interval is constant, common-interval information is generated which is distinct from the second flag and indicates a constant time interval between the removal times of the units. A bitstream including the encoded data, the first flag, the second flag, and the common-interval information is generated, with the common-interval information being included in control information of the bitstream.

Claims

1. An encoding apparatus of encoding units included in a picture, the encoding apparatus comprising:

at least one processor; and

a storage accessible by the at least one processor,

wherein the at least one processor performs operations including;

generating a first flag indicating whether a removal time of encoded data from a buffer by a hypothetical decoder is set per unit, the buffer being for storing the encoded data;

generating a second flag indicating whether an interval between removal times of the units is constant when the removal time is set per unit;

generating common-interval information when the second flag indicates that the interval is constant, the common-interval information being distinct from the second flag and indicating a constant time interval between the removal times of the units; and

generating a bitstream including the encoded data, the first flag, the second flag, and the common-interval information,

wherein the common-interval information is included in control information of the bitstream.