AK8857VQ Datasheet, PDF (1/105 Pages) Asahi Kasei Microsystems – Dual Channel Digital Video Decoder

[AK8857VQ]
AK8857VQ
Dual Channel Digital Video Decoder
Overview
The AK8857VQ is a single-chip digital video decoder for composite and s-video video signals. In case
of composite video signal, it can decode two inputs at the same time. Its output data is in YCbCr
format, compliant with ITU-R BT.601. Its output interface is ITU-R BT.656 compliant. A simple IP
conversion function is built internally and the output pixel size also can easily be changed using this
function. The operating temperature range is −40°C to 85°C. The package is 64-terminal LQFP.
Features
· Decodes two inputs of composite video signals NTSC (J, M, 4.43), PAL (B, D, G, H, I, M, N, Nc, 60),
SECAM at the same time.
· Decodes S-video video signals NTSC (J, M, 4.43), PAL (B, D, G, H, I, M, N, Nc, 60), SECAM.
· Four input channels, with internal video switch.
· 11-bit 54Mhz ADC 1 channel.
· Digital PGA.
· Adaptive automatic gain control (AGC).
· Auto Color Control (ACC)
· Simple IP conversion function (Line repeating process).
· Image adjustment (contrast, saturation, brightness, hue, sharpness).
· Automatic input signal detection.
· Adaptive 2-D Y/C separation.
· ITU-R BT.656 and ITU-R BT.601 format output (with 4:2:2_8 bit parallel_EAV/SAV).
· Supported output pixel size : 720x487, 720x576, WVGA, VGA, WQVGA, QVGA
· SYNC signal timing for external output : HSYNC/HACT, VSYNC/VACT, FIELD, DVALID
· Closed-caption signal decoding (output via register).
· VBID(CGMS-A) signal decoding (CRCC decode) (output via register).
· WSS signal decoding (output via register).
· Power down function.
· I²C control.
· 1.70~2.00 V core power supply.
· 1.70~3.60 V interface power supply.
· Operating temperature range: −40°C to 85°C.
· 64-pin LQFP package.
*Because the data is sampling to a fixed clock, it may not fullfilled the ITU-R BT.656 standard interface.
MS1189-E-01
-1-
2010/12