AK8850 Datasheet, PDF (1/99 Pages) Asahi Kasei Microsystems – NTSC Digital Video Decoder

ASAHI KASEI
[AK8850]
AK8850
NTSC Digital Video Decoder
General Description
The AK8850 decodes NTSC composite video, S-Video and Component Video signals (525/625) into digital
formats. Digital output conforms to ITU-R BT.601 and ITU-R BT.656* YCrCb specifications. The AK8850 outputs
a control signal to generate clocks synchronized with either Horizontal Sync or Vertical Sync signals. Its clock rate
is 27 MHz.
An encoded VBID Closed Caption signal can be extracted from the video signal and sent to an external pin on the
AK8850.
Features
NTSC-M Composite signal and S-Video signal decoder
Component Video decoder for 525 / 625 systems ( Betacam,MII,EBU N10 )
On-chip triple 10-Bit ADCs ( 27 MHz operation )
On-chip Programmable Gain Amp ( PGA ), ranging from 0 dB to 12 dB in 0.1 dB / steps
Input-synchronized clock is generated by an external VCXO
Sub-Carrier generation by Digital Synthesizer ( DFS )
Auto Color Control ( ACC )
Auto Gain Control ( AGC )
Adaptive 3-line Y-C separation
ITU-R BT.656 format output ( 4:2:2 8-Bit parallel output with EAV / SAV )
NTSC Closed Caption signal decoding function
VBID Program condition decoding function
WSS Program condition decoding function
Video Aspect Signal decoding function on Line 16 and Line 279
Sleep function
6–channel Analog inputs
I2C Control
3.3 V CMOS
100-Pin LQFP package
note: * ITU-R BT.656 spec may not be satisfied, as it is dependent upon input signal quality.
Rev.0
1
2002/01