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SAA7114

PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC comb filter, VBI data slicer and high performance scaler

Philips Electronics 

Philips Semiconductors

PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC

comb filter, VBI data slicer and high performance scaler

Product specification

SAA7114

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 inclusive built-in analog anti-alias filters

• Fully programmable static gain or Automatic Gain

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

• Automatic Clamp Control (ACC) for CVBS, Y and C

• Switchable white peak control

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

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

the expansion port

• On-chip line-locked clock generation in accordance with

“ITU 601”

• Digital PLL for synchronization and clock generation

from all standards and non-standard video sources e.g.

consumer grade VTR

• Requires only one crystal (32.11 or 24.576 MHz) for all

standards

• Horizontal and vertical sync detection

• Automatic detection of 50 and 60 Hz field frequency,

and automatic switching between PAL and NTSC

standards

• Luminance and chrominance signal processing for

PAL B, G, D, H, I and N, combination PAL N, PAL M,

NTSC M, NTSC-Japan, NTSC 4.43 and SECAM

• Adaptive 2/4-line comb filter for two dimensional

chrominance/luminance separation:

– Increased luminance and chrominance bandwidth for

all PAL and NTSC standards

– Reduced cross colour and cross luminance artefacts

• PAL delay line for correcting PAL phase errors

• Independent Brightness Contrast Saturation (BCS)

adjustment for decoder part

• User programmable sharpness control

• Independent gain and offset adjustment for raw data

path.

1.2 Video scaler

• Horizontal and vertical downscaling and upscaling to

randomly sized windows

• Horizontal and vertical scaling range: variable zoom to

1⁄64 (icon) (it should be noted that the H and V zoom are

restricted by the transfer data rates)

• Anti-alias and accumulating filter for horizontal scaling

• Vertical scaling with linear phase interpolation and

accumulating filter for anti-aliasing (6-bit phase

accuracy)

• Horizontal phase correct up and downscaling for

improved signal quality of scaled data, especially for

compression and video phone applications, with 6-bit

phase accuracy (1.2 ns step width)

• Two independent programming sets for scaler part, to

define two ‘ranges’ per field or sequences over frames

• Fieldwise switching between decoder part and

expansion port (X port) input

• Brightness, contrast and saturation controls for scaled

outputs.

1.3 Vertical Blanking Interval (VBI) data decoder

and slicer

• Versatile VBI data decoder, slicer, clock regeneration

and byte synchronization e.g. for World Standard

Teletext (WST), North American Broadcast Text System

(NABTS), close caption, Wide Screen Signalling (WSS),

etc.

1.4 Audio clock generation

• Generation of a field-locked audio master clock to

support a constant number of audio clocks per video

field

• Generation of an audio serial and left/right (channel)

clock signal.

2004 Mar 03

3

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