AK8855 Datasheet, PDF (1/81 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Decoder

[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 be available.
- Camera Interface
- Interface by HD / VD / DVALID signals
• Closed Caption decoding function ( to be output by register setting )
• VBID ( CGMS-A ) decoding function ( CRCC decode )
( to be output by register setting )
• WSS decoding function ( to be output by register setting )
• Macrovision signal detect function
• Power-down function
• I2C Control compatible
• Internal operating power supply 2.7 V ~ 3.3 V
• supplying I / F Power Supply ( 1.6 V ~ 2.0 V or 2.7 V ~ 3.3 V )
• Package 57 FBGA
MS0319-E-03
1
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