Efficient multichannel automatic setup and remote control...

H - Electricity – 04 – N

Patent

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350/48

H04N 5/21 (2006.01) H04N 5/232 (2006.01)

Patent

CA 1155216

ID 2745 ABSTRACT OF THE DISCLOSURE A simplified automatic error correction setup system is coupled to the remote control multiplex/demultiplex circuitry in a color camera to generate and store respective error correction control voltages for selected operating parameters during a camera setup mode, with subsequent automatic retrieval of the stored error correction control voltages during camera operation. The automatic control voltages are digitally generated from incoming error signals via a control system loop generally formed of an error selector switch, a digital register, a digital-to- analog converter (DAC) and a random access memory (RAM). The register and/or RAM data are converted to analog control vol- tages via the DAC for each parameter (i.e., channel) being auto- matically corrected, which voltages are linearly summed with the corresponding control voltages. During the automatic setup mode, the RAM contents are updated via the register for any existing errors in the specific operating parameters. The register is then disabled and the updated RAM cyclically read out continuously during the camera operating mode.

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