US 12,464,154 B2
Moving image coding apparatus and moving image coding method
Masaki Goto, Yokohama (JP)
Assigned to JVCKENWOOD Corporation, Yokohama (JP)
Filed by JVCKENWOOD Corporation, Yokohama (JP)
Filed on Jan. 20, 2022, as Appl. No. 17/580,492.
Application 17/580,492 is a continuation of application No. PCT/JP2020/028102, filed on Jul. 20, 2020.
Claims priority of application No. 2019-135396 (JP), filed on Jul. 23, 2019.
Prior Publication US 2022/0150526 A1, May 12, 2022
Int. Cl. H04N 19/46 (2014.01); H04N 19/167 (2014.01)
CPC H04N 19/46 (2014.11) [H04N 19/167 (2014.11)] 5 Claims
OG exemplary drawing
 
1. A moving image coding apparatus adapted to code moving images including time-continuous frames, comprising:
a moving image coding unit that outputs a coded bitstream in which the moving images are coded;
a position information generation unit that generates position information in a frame, based on time-continuity information indicating time continuity of the time-continuous frames, the time-continuity information being a value that varies with time and the position information indicating a different position for each frame;
a coded information acquisition unit that acquires coded information on the moving images, which is extracted from the different position for each frame based on the position information;
an inspection information generation unit that generates inspection information for detecting tampering of the moving image by identifying lost time-continuity from the coded information and the time-continuity information that is used to generate the position information; and
a multiplexing unit that multiplexes the coded bitstream and the inspection information, wherein
the position information generation unit converts the time-continuity information by using a hash function so as to generate the position information in the frame indicating an x coordinate and a y coordinate that changes randomly for each frame.