MSP3410D datasheet(7/83 Pages) MICRONAS

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PRELIMINARY DATA SHEET

MSP 34x0D

Micronas

3. Application Fields of the MSP 34x0D

In the following sections, a brief overview of the two

main TV sound standards, NICAM 728 and German

FM-Stereo, demonstrates the complex requirements of

a multistandard audio IC.

3.1. NICAM plus FM/AM-Mono

According to the British, Scandinavian, Spanish, and

French TV standards, high-quality stereo sound is

transmitted digitally. The systems allow two high-qual-

ity digital sound channels to be added to the already

existing FM/AM channel. The sound coding follows the

format of the so-called Near Instantaneous Compand-

ing System (NICAM 728). Transmission is performed

using Differential Quadrature Phase Shift Keying

(DQPSK). Table 3–2 provides some specifications of

the sound coding (NICAM); Table 3–3 offers an over-

view of the modulation parameters.

In the case of NICAM/FM (AM) mode, there are three

different

audio

channels

available:

NICAM A,

NICAM B, and FM/AM-Mono. NICAM A and B may

belong either to a stereo or to a dual-language trans-

mission. Information about operation mode and the

quality of the NICAM signal can be read by the CCU

via the control bus. In the case of low quality (high bit-

error rate), the CCU may decide to switch to the ana-

log FM/AM-Mono sound. Alternatively, an automatic

NICAM-FM/AM switching may be applied.

3.2. German 2-Carrier System (Dual-FM System)

Since September 1981, stereo and dual-sound pro-

grams have been transmitted in Germany using the

2-carrier system. Sound transmission consists of the

already existing first sound carrier and a second sound

carrier additionally containing an identification signal.

More details of this standard are given in Tables 3–1

and 3–4. For D/K and M-Korea, very similar systems

are used.

Note: NICAM demodulation cannot be done with the MSP 3400D

Table 3–1: TV standards

TV System

Position of Sound

Carrier /MHz

Sound

Modulation

Color System

Country

B/G

5.5/5.7421875

FM-Stereo

PAL

Germany

B/G

5.5/5.85

FM-Mono/NICAM

PAL

Scandinavia, Spain

6.5/5.85

AM-Mono/NICAM

SECAM-L

France

6.0/6.552

FM-Mono/NICAM

PAL

D/K

6.5/6.2578125 D/K1

6.5/6.7421875 D/K2

6.5/5.85 D/K-NICAM

FM-Stereo

FM-Mono/NICAM

SECAM-East

USSR

Hungary

M-Korea

4.5

4.5/4.724212

FM-Mono

FM-Stereo

NTSC

USA

Korea

Satellite

6.5

7.02/7.2

FM-Mono

FM-Stereo

PAL

Europe (ASTRA)

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