Lapis Technology Co., Ltd.

Takuya Motohashi

Yuki Imatoh

Tadashi Takenoshita

Takuto Obara

Masataka Oguchi

A video signal processing device includes a selection/output unit that receives a video signal, sequentially selects and outputs a sequence of image data pieces of split image regions, a CRC calculation circuit that executes CRC calculation on a sequence of pixel data pieces outputted from the selection/output unit, a calculation result sorting unit that generates test values corresponding to the split image regions based on a CRC calculation result, a freeze determination unit that, based on the test values corresponding to one frame and the test values corresponding to another frame, determines whether a change has occurred in the video of the split image regions between the frames, and a video freeze detection unit that, by determining whether or not a state where no change has occurred in the video is continuing over a prescribed number of frame periods, detects whether or not the video is frozen.

Video signal processing device

A video processing device includes a receiver that successively receives input images, each having a prescribed overlapping image superimposed in one or more areas thereof, a compositing image generation unit that successively generates compositing images based on the external information, a video compositing unit that successively generates composite images, a compositing abnormality detection unit that determines whether one or more areas of the composite image have abnormality or not, a comparison unit that compares the one or more areas of the input image with those of the composite image to determine whether or not the respective areas match, if it is determined that the composite image have no abnormalities, and an output control unit that outputs the input image if it is determined that the respective areas match, and outputs the composite image when it is determined that the respective areas do not match.

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Yokohama, Japan

Takuya Motohashi