Msp341X Multistandard Sound Processor; Basic Features Of The Msp 341X; Demodulator & Nicam Decoder Section - Daewoo DTH-29U3 Service Manual

CP830F Service Manual

4.4 MSP341X MULTISTANDARD SOUND PROCESSOR

The MSP 341x is designed as a single-chip Multistandard Sound Processor for applications in analogue and digital TV
sets, video recorders, and PC cards.
The MSP3411 has all functions of MSP3410 with the addition of a virtual surround sound features.
Surround sound can be reproduced to a certain extent with two loudspeakers. The MSP3411 includes virtualizer
algorithm 3D Panorama which has been approved by the Dolby laboratories for compliance with the Virtual Dolby
Surround technology. In addition, the MSP3411 includes Micronas Panorama algorithm.
MSP 341x features:
sound IF input
No external filters required
Stereo baseband input via integrated AD converters
Two pairs of DA converters
Two carrier FM or NICAM processing
AVC : Automatic Volume Correction
Bass, treble, volume processing
Full SCART in/out matrix without restrictions
Improved FM-identification
Demodulator short programming
Auto-detection for terrestrial TV - sound standards
Precise bit-error rate indication
Automatic switching from NICAM to FM/AM or vice versa
Improved NICAM synchronisation algorithm
Improved carrier mute algorithm
Improved AM-demodulation
Reduction of necessary controlling
Less external components

4.4.1 BASIC FEATURES OF THE MSP 341X

4.4.1.1 Demodulator & NICAM Decoder Section
The MSP 341x is designed to simultaneously perform digital demodulation and decoding of NICAM-coded TV stereo
sound, as well as demodulation of FM or AM mono TV sound. Alternatively, two carrier FM systems according to the
German terrestrial specs can be processed with the MSP 341x.
The MSP 341x facilitates profitable multistandard capability, offering the following advantages:
Automatic Gain Control (AGC) for analogue input: input range: 0.10 - 3 Vpp
integrated A/D converter for sound-IF input
all demodulation and filtering is performed on chip and is individually programmable
easy realisation of all digital NICAM standards (B/G, I, L and D/K)
FM-demodulation of all terrestrial standards (include identification decoding)
no external filter hardware is required
only one crystal clock (18.432 MHz) is necessary
high deviation FM-mono mode (max. deviation: approx. 360 kHz)
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