AK8855 查看數據表（PDF） - Asahi Kasei Microdevices

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AK8855

NTSC/PAL Digital Video Decoder

Asahi Kasei Microdevices 

[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

2004 / 11

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