saa4996h NXP Semiconductors, saa4996h Datasheet - Page 11

• Manufacturer Part Number: saa4996h
• Description: Motion Adaptive Colour Plus And Control Ic Macpacic For Palplus
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7
7.1
The MACPACIC is designed to be used in the PALplus
decoder module of a PALplus colour TV receiver. The full
PALplus decoder module consists of two special
integrated circuits and four field memories, as illustrated in
Fig.5.
The special ICs are as follows;
Besides the full PALplus module, a configuration for
stand-alone Motion Adaptive Colour Plus processing
(MACP) is also possible (see Fig.6). In this event only
MACPACIC with FM1 and FM4 are necessary.
This configuration enables the MACP processing in
non-PALplus receivers to be performed.
The PALplus module is designed to operate in conjunction
with a 100 Hz feature box. All special requirements such
as the delay of the PALplus module, bypass modes and
generation of the necessary control and clock signals will
be fulfilled.
7.1.1
The MACPACIC includes the decompanding functions for
the helper lines and the motion adaptive
luminance/chrominance separation in accordance with the
PALplus system description REV. 3.0 with some
modifications;
The input signals are the BB(helper)/CVBS and
chrominance signals which are derived from the
analog-to-digital converter (ADC).
At its outputs the MACPACIC delivers separate luminance
and chrominance signals, each one free from
cross-artefacts as main signal, as well as decompanded
and filtered helper signals. For standard input signals and,
in the event of MultiPIP mode with the help of a
PIP module, the MACPACIC can be switched to different
bypass modes.
1996 Oct 28
Motion Adaptive Colour Plus And Control IC
(MACPACIC) for PALplus (SAA4996H)
Vertical Reconstruction IC (VERIC) (SAA4997H).
The system operates at a clock frequency of 16 MHz
The Y:U:V format is 4:1:1 instead of 4:2:2
The filter DEC_MD_UV_LPF is not implemented
If noisy helper signals are received, the helper
bandwidth and/or amplitude can be reduced
Automatic gain control of the helper signal with respect
to the luminance signal.
Motion Adaptive Colour Plus And Control
IC (MACPACIC) for PALplus
FUNCTIONAL DESCRIPTION
Introduction
D
ATA PROCESSING
11
7.1.2
Memory control, PALplus system controlling and clock
generation (from the incoming 16 MHz and 32 MHz
line-locked clocks) are implemented in the MACPACIC.
All clocks and control signals necessary for the PALplus
module (excluding read control of FM2/FM3) are
generated in the controller part. Inputs are reference
signals, clocks and control signals delivered by the
colour/helper decoder IC (TDA9144), and the 100 Hz
memory controller, i.e. ECO4 (SAA4952) or ECOBENDIC
(SAA4970). The MACPACIC also receives control
information via a three-wire serial interface (SNERT-bus)
from the microprocessor in the 100 Hz feature box.
7.2
The PALplus IC set is designed to operate in conjunction
with the PHILIPS 100 Hz feature box. All requirements
with respect to this combination are fulfilled.
The special requirements are as follows;
The signal processing is adapted to the analog
preprocessing in the TDA9144 for luminance, helper
and chrominance signals
Clock rate and clock generation
Some special control signals are generated in the
PALplus module
The field length must be measured and used to set the
delay of the full PALplus module to 1.5 fields
A SNERT interface is used to transfer control data to
and from the PALplus module
MultiPIP with the help of a PIP module is possible
Results of noise measurements influence the helper
processing
Automatic gain and offset control is implemented
Reference signals in line 22 are used for inverse set-up
operation
Noise measurement implemented
Boundary scan test implemented
Preset of internal recursive parts for testing.
General requirements
C
ONTROL
Preliminary specification
SAA4996H