ml86v7655 Oki Semiconductor, ml86v7655 Datasheet - Page 14

• Manufacturer Part Number: ml86v7655
• Description: Ntsc/pal-compatible, 6ch Dac-equipped Digital Video Encoder With Format Conversion Function
• Manufacturer: Oki Semiconductor

DESCRIPTION OF FUNCTIONAL BLOCKS
This section describes the functions of the blocks shown in the Block Diagram. For a detailed explanation of all
the functions, refer to the User’s Manual.
(1) Input Data Decoder
(2) Overlay & Color Bar Controller
(3) Progressive to Interlace
(4) Interlace to Progressive
(5) RGB to YCbCr/YCbCr to RGB
(6) Y/RGB Level Adjustment
(7) YCbCr to YUV
(8) Sync Controller
(9) CGMS/WSS/CC Controller
(10) LPF
OKI Semiconductor
Converts the video data format based on the format of the digitally input video data. ITU BT.656, 20-bit
4:2:2 YCbCr, and 10-bit 4:2:2 YCbCr input data are converted to 4:4:4 YCbCr data. When ITU BT.656 is
input, the synchronization information is separated from the SAV and EAV information to generate a
synchronization signal. RGB input data is output to the next block.
The input video signal limiter function clips the input video signal at the quantization level (64–940)
specified by ITU-R BT601. In the extended luminance range mode, the limiter function clips the input video
signal at the quantization level (4–1016).
A 3-bit title graphic and color bar are generated. The 3-bit title graphic becomes effective when the OLC pin
is set to “H”. The RGB graphic data input from the OLR, OLG and OLB pins can be replaced with input
video data in pixel units. The input video data supports YCbCr input, RGB input, interlaced input and
progressive input. With this function, letters can be displayed on the screen, as with the OSD function.
The built-in color bar becomes effective by setting the internal register value. The color bar is a color bar
with a luminance order (25%, 50%, 75% and 100%). It supports NTSC, PAL and YCbCr, RGB, CVBS,
S-Video, interlaced and progressive.
Converts progressive video data (YCbCr, RGB) to interlaced video data. Progressive video data to be input
supports YCbCr (4:2:2 and 4:4:4) and RGB.
Converts interlaced video data (YCbCr, RGB) to progressive video data.
Converts RGB/YCbCr data to YCbCr/RGB data.
This block adjusts the levels of the luminance signal Y, RGB data. The luminance signal level can be
adjusted in 16 steps (78.125% to 125%, in increments of 3.125%) by setting the internal register value. RGB
data gain can be set from 0.0 to 2.0 times by setting the internal register value. A different setting can be
made for each channel of R, G, and B.
Converts YCbCr data to YUV data.
This block adds a synchronization signal to the video signal, adds VBI data, and adjusts the synchronization
signal level and offset of the signal.
This block generates data of CGMS-A(Copy Generation Management System - Analog), WSS (Wide Screen
Signaling), and CC (Closed Caption).
Removes high frequency components from video data.
PEDL7655/56-000
ML86V7655/56
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