Circuit Operation Description - Olympus OEP-3 Service Manual

4-1. Digital Video Signal Processing Block
4-1-1. Outline
The main functions of the digital signal processing block on the VPR-63 board are as follows:
1. Converts a video input signal from analog to digital and stores it in memory (DRAM). (Capture)
2. Color-adjusts the image data stored in memory using a color adjustment circuit, and then converts the
data from digital to analog and outputs it to the analog signal processing block on the VPR-63 board
as a monitor output signal. (Monitor output)
3. Color-adjusts the image data stored in memory using a color adjustment circuit and then outputs it to
the head control block through a masking block as print data. (Print data output)
4. Converts a video input signal from analog to digital, converts the signal from digital to analog as it is,
and outputs it to the analog signal processing block as a monitor output signal. (Source output)
The digital signal processing block on the VPR-63 board consists of the following blocks.
. CPU block
. Memory (DRAM) block
. Memory control (ASIC) block
. Sampling clock generation block
. Color adjustment block
. Masking block
OEP-3 V1 (UC)
Section 4

Circuit Operation Description

4-1