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.

特性 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