Video signal processor with copy prevention function

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5668873
SERIAL NO

08404998

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Abstract

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A video signal processor is capable of executing on/off control of a copy inhibiting process and rendering extremely difficult any illegal cancellation of the copy inhibiting process by a third person. This video signal processor includes an obstructor for obstructing proper recording of a video signal; a memory for storing a specific code inputted when enabling the obstructor, and also for storing a disable request code inputted in response to a request for disabling the obstructor; a judge device for judging the relationship between the value of the specific code and the value of the disable request code outputted from the memory; and a decider for deciding an operation to disable the obstructor in accordance with the output of the judge means. The memory has a plurality of registers, and at least one of the bit components of the specific code and the disable request code is stored dispersedly in the plural registers in the memory.

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Patent Owner(s)

Patent OwnerAddress
SONY CORPORATION1-7-1 KONAN MINATO-KU TOKYO 1080075 ?1080075

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yamauchi, Etsuro Tokyo, JP 7 29

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