AK8850 Datasheet, PDF (23/99 Pages) Asahi Kasei Microsystems – NTSC Digital Video Decoder

ASAHI KASEI
[AK8850]
6-5. Y/C Separation Function
Adaptive Y/C separation:
Adaptive Y/C separation enables adjustment of the Chroma Signal Bandwidth. Adaptive Y/C Separation can also be
fixed to either 3-line 2 dimensional Y/C separation or single dimension Y/C separation.
6-6. Output Signal Bandwidth
At Composite signal input,
Luminance Signal Bandwidth : DC ~ 5.75 MHz + 0.5 /- 1.5 dB
Chroma Signal Bandwidth : +/- 500 KHz ~ +/- 1 MHz ( -3 dB ) ( 3 ranges selectable )
At Component signal input,
Luminance Signal Bandwidth : DC ~ 5.75 MHz +0.5 / -1.5 dB
Chroma Signal Bandwidth : DC ~ 5.75 MHz +0.5 / -1.5 dB
6-7. Video Quality Control Function
Contrast, Brightness, HUE and Color Saturation levels are adjustable.
No HUE adjustment is possible when a Component video signal is input.
6-8. Output Interface
ITU-R BT.601 compatible signal output levels
Decoded data is output in ITU-R BT.656 format ( depends on the input signal quality ).
Ability to detect signals during Active Video period using HSYNC/VSYNC ( FIELD )/ DVALID signals
8-Bit output at 27 MHz rate
6-9. Other Functions
Black level signal is output when no signal is applied ( Y = 16Cb,Cr = 128 )
”Lack of signal” input detection
I2C Bus Interface ( 400 KHz )
Power Save Mode
Closed Caption, VBID, WSS and Video Aspect ratio decoding Functions.
Rev.0
23
2002/01