AK8855

www.DataSheet4U.com [ASAHI KASEI] AK8855 AK8855 NTSC/PAL Digital Video Decoder General Description The AK8855 decodes the NTSC, PAL Composite Video signal into Digital code. Outputs are ITU-R BT. 601 Level compatible Y, Cb and Cr signals. Decoded results are scaled to QVGA/CIF sizes etc.. Output interface is camera-interface in ITU-R BT.656-alike output format. When such information as Closed Caption, VBID, WSS are encoded on the Video signal, each code can be read out externally. When the Macrovision signal is super-imposed, its information can also externally be read out. Features NTSC-M / PAL- B, D, G, H, I Composite signal decoding process 2-CH input acceptable (selector is integrated on-chip ) On-chip 10 Bit ADC (operation at 24.5454 MHz or 27 MHz ) Fixed clock Sampling On-chip PLL ( 27 MHz clock generation from 24.5454 MHz ) On-chip Quartz Crystal Oscillator circuit Pixel Position Correction function Selectable Picture sizes (QVGA / VGA / QCIF / CIF / 601 ) - Rotated Picture Mode output available (ex. QVGA : 240 X 180 ) Selectable Output rate (525 : 30 / 15 / 7.5 625 : 25 / 12.5 / 6.25 [ frames / sec ] ) On-chip Anti-Aliasing Filter On-chip PGA ( 0 dB ~ 12 dB ) Auto Color Control (ACC) function Adaptive Auto Gain Control (AGC) function Primary YC Separation Output Interface - ITU-R BT.656-alike output format (4:2:2 8 Bit parallel output with EAV / SAV ) * * depending on the input signal quality, ITU-R BT. 656 compatible output may not b...