MSP3461G Ver la hoja de datos (PDF) - Micronas

Número de pieza

componentes Descripción

Fabricante

MSP3461G

Multistandard Sound Processor Family with Virtual Dolby Surround

Micronas 

MSP 34x1G

PRELIMINARY DATA SHEET

Multistandard Sound Processor Family with Virtual

Dolby Surround

Release Note: Revision bars indicate significant

changes to the previous edition.The hardware and

software description in this document is valid for

the MSP 34x1G version B8 and following versions.

1. Introduction

The MSP 34x1G family of single-chip Multistandard

Sound Processors covers the sound processing of all

analog TV-Standards worldwide, as well as the NICAM

digital sound standards. The full TV sound processing,

starting with analog sound IF signal-in, down to pro-

cessed analog AF-out, is performed on a single chip.

Figure 1–1 shows a simplified functional block diagram

of the MSP 34x1G.

The MSP 34x1G has all functions of the MSP 34x0G

with the addition of a virtual surround sound feature.

Surround sound can be reproduced to a certain extent

with two loudspeakers. The MSP 34x1G includes the

Micronas virtualizer algorithm “3D-PANORAMA” which

has been approved by the Dolby1) Laboratories for

compliance with the "Virtual Dolby Surround" technol-

ogy. In addition, the MSP 34x1G includes the “PAN-

ORAMA” algorithm.

These TV sound processing ICs include versions for

processing the multichannel television sound (MTS)

signal conforming to the standard recommended by

the Broadcast Television Systems Committee (BTSC).

The DBX noise reduction, or alternatively, Micronas

Noise Reduction (MNR) is performed alignment free.

Other processed standards are the Japanese FM-FM

multiplex standard (EIA-J) and the FM Stereo Radio

standard.

Current ICs have to perform adjustment procedures in

order to achieve good stereo separation for BTSC and

EIA-J. The MSP 34x1G has optimum stereo perfor-

mance without any adjustments.

All MSP 34xxG versions are pin compatible to the

MSP 34xxD. Only minor modifications are necessary

to adapt a MSP 34xxD controlling software to the

MSP 34xxG. The MSP 34x1G further simplifies con-

trolling software. Standard selection requires a single

I2C transmission only.

The MSP 34x1G has built-in automatic functions: The

IC is able to detect the actual sound standard automat-

ically (Automatic Standard Detection). Furthermore,

pilot levels and identification signals can be evaluated

internally with subsequent switching between mono/

stereo/bilingual; no I2C interaction is necessary (Auto-

matic Sound Selection).

The ICs are produced in submicron CMOS technology.

The MSP 34x1G is available in the following packages:

PLCC68 (not intended for new designs), PSDIP64,

PSDIP52, PQFP80, and PLQFP64.

Sound IF1

Sound IF2

I2S1

I2S2

SCART1

SCART2

SCART3

SCART4

MONO

ADC

De-

modulator

Pre-

processing

Prescale

SCART

DSP

Input

Select

ADC

Prescale

Loud-

speaker

Sound

Processing

Headphone

Sound

Processing

DAC

DAC

DAC

DAC

SCART

Output

Select

Loud-

speaker

Subwoofer

Headphone

I2S

SCART1

SCART2

Fig. 1–1: Simplified functional block diagram of the MSP 34x1G

6

Micronas

Share Link: