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SAA7108AE

HD-CODEC

Philips Electronics 

Philips Semiconductors

HD-CODEC

Product specification

SAA7108AE; SAA7109AE

1 FEATURES

1.1 Video decoder

• Six analog inputs, internal analog source selectors, e.g.

6 × CVBS or (2 × Y/C and 2 × CVBS) or (1 × Y/C and

4 × CVBS)

• Two analog preprocessing channels in differential

CMOS style for best S/N performance

• Fully programmable static gain or Automatic Gain

Control (AGC) for the selected CVBS or Y/C channel

• Switchable white peak control

• Two built-in analog anti-aliasing filters

• Two 9-bit video CMOS Analog-to-Digital Converters

(ADCs), digitized CVBS or Y/C signals are available on

the Image Port Data (IPD) port under I2C-bus control

• On-chip clock generator

• Line-locked system clock frequencies

• Digital PLL for horizontal sync processing and clock

generation, horizontal and vertical sync detection

• Requires only one crystal (either 24.576 MHz or

32.11 MHz) for all standards

• Automatic detection of 50 and 60 Hz field frequency,

and automatic switching between PAL and NTSC

standards

• Luminance and chrominance signal processing for

PAL BGHI, PAL N, combination PAL N, PAL M,

NTSC M, NTSC-Japan, NTSC N, NTSC 4.43 and

SECAM

• User programmable luminance peaking or aperture

correction

• Cross-colour reduction for NTSC by chrominance comb

filtering

• PAL delay line for correcting PAL phase errors

• Brightness Contrast Saturation (BCS) and hue control

on-chip

• Two multi functional real-time output pins controlled by

the I2C-bus

• Multi-standard VBI data slicer decoding World Standard

Teletext (WST), North-American Broadcast Text

System (NABTS), Closed Caption (CC), Wide Screen

Signalling (WSS), Video Programming System (VPS),

Vertical Interval Time Code (VITC) variants

(EBU/SMPTE) etc.

• Standard ITU 656 Y-CB-CR 4 : 2 : 2 format (8-bit) on IPD

output bus

• Enhanced ITU 656 output format on IPD output bus

containing:

– active video

– raw CVBS data for INTERCAST applications

(27 MHz data rate)

– decoded VBI data

• Detection of copy protected input signals according to

the Macrovision™(1) standard. Can be used to prevent

unauthorized recording of pay-TV or video tape signals.

1.2 Video scaler

• Both up and downscaling

• Conversion to square pixel format

• NTSC to 288 lines (video phone)

• Phase accuracy better than 1/64 pixel or line, horizontally

or vertically

• Independent scaling definitions for odd and even fields

• Anti-alias filter for horizontal scaling

• Provides output as:

– scaled active video

– raw CVBS data for INTERCAST, WAVE-PHORE,

POPCON applications or general VBI data decoding

(27 MHz or sample rate converted)

• Local video output for Y-CB-CR 4 : 2 : 2 format (VMI,

VIP, ZV).

(1) Macrovision™ is a trademark of the Macrovision Corporation.

2004 Jun 29

3

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