Moving image coding apparatus and moving image coding method

Patent metadata

Field	Value
Publication number	US-12464154-B2
Application number	US-202217580492-A
Country	US
Kind code	B2
Filing date	Jan 20, 2022
Priority date	Jul 23, 2019
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A moving image coding apparatus adapted to code moving images including time-continuous frames is provided. A moving image coding unit outputs a coded bitstream in which the moving images are coded. A position information generation unit generates position information in a frame, based on time-continuity information indicating time continuity of the frames. A coded information acquisition unit acquires coded information on the moving images, based on the position information. An inspection information generation unit generates inspection information from the coded information. A multiplexing unit multiplexes the bitstream and the inspection information.

First claim

What is claimed is:

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.

2 . The moving image coding apparatus according to claim 1 , wherein
the moving image coding apparatus is mounted on a vehicle; and the inspection information generation unit generates the inspection information by combining the coded information and additional information related to vehicle travel.

3 . The moving image coding apparatus according to claim 1 , wherein
when the moving images are divided into a plurality of files, the multiplexing unit multiplexes the time-continuity information in a leading frame of each file.

4 . A moving image coding method adapted to code moving images including time-continuous frames, comprising:
outputting a bitstream in which the moving images are coded; generating 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; acquiring coded information on the moving images, which is extracted from the different position for each frame based on the position information; generating 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 multiplexing the bitstream and the inspection information, wherein the generating position information 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.

5 . The moving image coding apparatus according to claim 2 , wherein
the additional information is either one of a position, speed, acceleration, accelerator position, and steering angle of the vehicle.

Assignees

• Jvckenwood Corp

Inventors

• Goto Masaki

Classifications

• H04N19/167

  Position within a video image, e.g. region of interest [ROI] · CPC title

• G06F21/64

  Protecting data integrity, e.g. using checksums, certificates or signatures · CPC title

• H04N9/8205

  involving the multiplexing of an additional signal and the colour video signal · CPC title

• H04N9/80

  Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback · CPC title

• H04N2005/91307

  by adding a copy protection signal to the video signal · CPC title