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US 5,347,316 AGranted
Image information transmission system having time base variation correcting function
AssigneeCanon Kabushiki Kaisha
InventorTokihiko Ogura
Life of this patent
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Abstract
An image information transmission system of the kind receiving a transmitted analog image signal and forming digital image data by sampling the received analog image signal is arranged to control the timing of sampling according to the level of data of a specific part of the digital image data formed. The arrangement enables the system to accurately transmit the image information without being affected by time base variations caused by transmission.
Claims6
An image information transmission system for transmitting image information, comprising:
- (A) conversion means arranged to receive a transmitted analog image signal, to convert the received analog image signal into digital image data in synchronism with a sampling clock signal and to output the digital image data;
- (B) storing means for inputting the digital image data outputted from said conversion means and storing the inputted digital image data;
- and
- (C) sampling clock signal delay means arranged to detect a difference value between data indicating a largest value and data indicating a second largest value among a plurality of data in a specific term of the image data, to compare the detected difference value with a given threshold value, to delay the sampling clock signal according to the result of comparison, and to supply the delayed sampling clock signal to said conversion means.
1 more element
Dependencies are inferred from the claim text.