saa4996h NXP Semiconductors, saa4996h Datasheet - Page 12

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

Philips Semiconductors
7.3
Two general hardware configurations are possible.
7.3.1
The delay from input to output is 1.5 fields rounded to
complete lines, also in the bypass mode. Therefore, the
number of input lines of the odd and even fields must be
measured. The result of this measurement is then used to
generate the required delay.
In the MultiPIP mode the delay of the full PALplus module
is one line.
7.3.2
In this situation only the MACPACIC with FM1 and FM4
are necessary. No helper lines are processed and no
vertical reconstruction with the VERIC is applied.
The delay from input to output is one field, one line and
some clocks of processing delay, this also applies in the
bypass mode. In the MultiPIP mode the delay is two clocks
(CLK_16).
1996 Oct 28
Motion Adaptive Colour Plus And Control
IC (MACPACIC) for PALplus
Hardware configurations and delays
F
S
ULL
TAND
PAL
-
ALONE
PLUS MODULE
MACPACIC (see Fig.6)
(see Fig.5)
12
7.4
In front of the MACPACIC an analog colour/helper
decoder (TDA9144) performs the colour and helper
demodulation.
Because of the requirement that a standard ADC with
clamping on 16 should be used for CVBS and helper
analog-to-digital conversion, a black (letter box lines) and
mid grey (helper lines) shift is applied in the colour/helper
decoder. For reshifting without errors in the digital domain
these shift levels are inserted as a reference in line 22.
In the event of stand-alone MACPACIC and PALplus input
signals the helper demodulation must be switched off.
No special actions are taken in the colour/helper decoder
for chrominance processing.
In this document U will refer to (B
In combination with the full PALplus module with letter box
input signals (16:9), the PAL delay line of the colour/helper
decoder must be switched off. This is because this function
is also implemented in the vertical reconstruction filter of
the VERIC. For all other input signals and for stand-alone
MACPACIC the PAL delay line must be switched on.
(R
Y).
Analog processing in front of the PALplus
module
Preliminary specification
Y) and V will refer to
SAA4996H