Philips Semiconductors
Preliminary specification
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb filter, VBI-data slicer and high performance scaler
1
1.1
FEATURES
Video decoder
SAA7114H
•
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 according
“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 BGDHIN, 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 down-scaling and up-scaling to
randomly sized windows
•
Horizontal and vertical scaling range: variable zoom to
1
⁄
(icon); it should be noted that the H and V zoom are
64
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 down scaling 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.
2000 Mar 15
3
PHILIPS [ NXP SEMICONDUCTORS ]
