OKI Semiconductor
ML86V7667
NTSC/PAL Digital Video Decoder
PEDL86V7667-00
Issue Date: Jan. 13, 2005
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GENERAL DESCRIPTION
The ML86V7667 is an LSI that converts NTSC and PAL analog video signals into the standard digital format or
8-bit digital data conforming to ITU-R recommendation BT.601/BT.656 YCbCr.
The video input has a built in 1-channel 10-bit A/D converter and supports composite video signals.
The composite video signal is separated into luminance and chrominance signals by an adaptive 2-dimensional
Y/C separation filter (2- or 3-line adaptive comb filter) and converted into general purpose video data format.
The sampling methods that can be used are the asynchronous sampling method which is a feature of Oki’s
decoders and the line-locked clock sampling method using a digital PLL.
As for image jitter, which is a problem in asynchronous sampling methods in normal cases, jitter-free output data
can be obtained because the ML86V7667 incorporates into it a pixel position correction circuit and a FIFO for
pixel count correction.
USES AND APPLICATION EXAMPLES
The ML86V7667 can be used as a video signal input interface IC in any system carrying out digital image
processing. It can be operated using digital PLL with line-locked clock in applications requiring high picture
quality. Also, high-speed synchronous operation using asynchronous clock is possible in applications requiring
high-speed synchronization, such as switching operation using multichannel inputs.
Application Examples
Various types of TVs and equipment for TV reception such as:
TFT/PDP or other flat panel TVs, PC TVs, digital TVs, set-top boxes for TV broadcast reception
Image recording devices such as:
DVD-R/W, HDD recorders, digital VTRs, digital video cameras, and digital cameras
Monitoring systems such as:
Multidisplay devices, long-time recording devices, transmission devices for remote monitoring
PC peripheral devices such as:
Video capture boards, image editing devices, Internet monitoring cameras
FEATURES
Input Section
Supports composite video signals in NTSC/PAL format
Two composite video inputs can be connected
Clamping circuit and video amplifier built-in
1-channel 10-bit A/D converter built-in
Line-locked clock sampling mode or asynchronous sampling mode selectable
Supported pixel frequencies (sampling clock: double speed):
27 MHz
: NTSC/PAL ITU-R BT.601
24.545454 MHz
: NTSC Square pixel
28.63636 MHz
: NTSC 4fsc
29.5MHz
: PAL Square pixel
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