S
o
u
rc
e
S
el
ec
t
Loud-
SCART1
SCART2
SCART1
SCART2
SCART3
SCART4
MONO
De-
modulator
Headphone
Headphone
2
I S
Sound
speaker
Processing
Sound
Processing
DAC
DAC
ADC
Loud-
DAC
DAC
ADC
Subwoofer
SCART
DSP
Input
Select
Pre-
processing
SCART
Output
Select
Prescale
Prescale
2
I S1
2
I S2
Sound IF1
Sound IF2
speaker
1.MSP3450G
MSP3450G is one of MSP34x0G series. It is a single chip multi-system processor for sound,
which covers global wide analog TV system processing for sound. In the case of NICAM digital
sound system, all the TV sound processing from analog IF signal input to AF-OUT (audio output)
after processing is performed in this single chip.
The sound signal of TV, AV, S-VIDEO, Y.Pb.Pr ,VGA is input through the ports of MSP34x0G (pin
67 for TV),(pins 53,54 for AV1),(pins 56,57 for AV2),(pins 50,51 fir YPBPR),(47,48 pins for VG)and
the present sound form is automatically inspected. Besides, the electric level s of pilot frequency and
identification signal is inspected and measured internally by the sequence switch between
MONO/STEREO/BILINGUAL, and it's unnecessary to be processed through the bus line. The
processed signal is output through pins 27 and 28 and then fed to pins 1 and 2 of N403 M6249 for
SRS treatment.
(3).Audio frequency part
MSP3450G
1
3
