Moving image coding apparatus and moving image coding method
AssigneeJVCKENWOOD Corporation
InventorMasaki Goto
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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.
Claims5
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.
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.
Dependencies are inferred from the claim text.