NTSC/PAL Video Decoder - AKM
Description
ASAHI KASEI
[AK8856VN ]
AK8856VN
NTSC/PAL Video Decoder
General Description
The AK8856 decodes NTSC or PAL composite video signals into digital video data.
The outputs are ITU-R BT.
601 level compatible Y, Cb and Cr signals.
The decoded result is scaled to 601, VGA (interlaced output), CIF, QVGA, QCIF, rotated QVGA , or rotated CIF(progressive).
Information including closed caption, VBID, and WSS are encoded in the video signal can be read out externally.
The AK8856 is controlled by through an I2C interface.
Features
• • • • • • • • NTSC-M, NTSC-4.
43 / PAL- B, D, G, H, I, N, Nc, M, 60 composite signal decoding process 10 Bit ADC (sampling at 24.
5454MHz or 27MHz) Integrated PGA (0dB ~ 12dB) Automatic color control (ACC) function Adaptive automatic gain control (AGC) function 1D or 2D YC separation Phase compensation for PAL Output interface - ITU-R BT.
656 output format (4:2:2 8-bit parallel output with EAV / SAV) - Camera interface - Interface with HD / VD / DVALID signals Closed caption decoding function (read by register setting) VBID (CGMS-A) decoding function (CRCC decode) (read by register setting) WSS decoding function (read by register setting) Macrovision signal detect function Power-down function 2-channel analog input selector I2C control compatible Core voltage (AVDD, DVDD) 1.
65 - 1.
8V I/O voltage (PVDD) 1.
65 - 3.
3V Package: 48 QFN or 41 BGA (see VG datasheet)
• • • • • • • • • •
* The output that meets the ITU-R BT.
656 standard according to the fineness of the input signal might not be available.
MS0522-E-00
1
2006/Dec
Free Datasheet http://www.
datasheet-pdf.
com/
ASAHI KASEI
Block Diagram
XTI XTO LPF SCL SDA PDN RSTN OE
27MHz Clock GEN PLL 27MHz -> 27.
0000MHz or 24.
5454MHz 27 or 24.
5454MHz I2C bus uC Interface Register DATA[7:0] HD/HV Output Buffer VD/VAF/FIELD DVALID NSIG DTCLK AIN1 AIN2 MUX CLAMP PGA
10-bit ADC
CLKMOD
Decimation Filter
SYNC-Separation AGC Ctrl VBI Info Timing Controller Timing
Y Cb Cr
YC Sep 2D/1D
Y
Luminance Processo...
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