Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1986-09-02
1988-09-27
Shoop, Jr., William M.
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
358 28, H03M 166
Patent
active
047744952
ABSTRACT:
An interface circuit for translating digital signals signifying colors in any of various color formats into analog signals for controlling respective primary colors of a display monitor operating in a standard R, G, B primary color format. The circuit adds a control bit to each digital signal identifying the color format of the signal, and each of the colors signified by respective digital signals are identified by digital words corresponding thereto stored in a digital memory. The bits of each stored word control respective levels of analog signal attenuation in analog summing networks for converting each of such words into respective R, G, B analog signals for the video monitor. Changing the value of the control bit changes the word read-out from the memory in accordance with the particular color format of the received digital signals.
REFERENCES:
patent: 3744050 (1973-07-01), Hedrick
patent: 4216460 (1980-08-01), Baldwin et al.
patent: 4547797 (1985-10-01), Mick
Rafter Patrick M.
Wolter Donald B.
Blum Richard K.
Briody Thomas A.
Eason Leroy
Haken Jack E.
North American Philips Consumer Electronics Corp.
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