MSP3400D Ver la hoja de datos (PDF) - Micronas

Número de pieza

componentes Descripción

Fabricante

MSP3400D

Multistandard Sound Processors

Micronas 

MSP 34x0D

PRELIMINARY DATA SHEET

Table 3–2: Summary of NICAM 728 sound coding characteristics

Characteristics

Audio sampling frequency

Number of channels

Initial resolution

Companding characteristics

Coding for compressed samples

Preemphasis

Audio overload level

Values

32 kHz

2

14 bits/sample

near instantaneous, with compression to 10 bits/sample in 32-sample

(1 ms) blocks

2’s complement

CCITT recommendation J.17 (6.5 dB attenuation at 800 Hz)

+12 dBm measured at the unity gain frequency of the preemphasis

network (2 kHz)

Table 3–3: Summary of NICAM 728 sound modulation parameters

Specification

I

B/G

L

D/K

Carrier frequency of

digital sound

6.552 MHz

5.85 MHz

5.85 MHz

5.85 MHz

Transmission rate

728 kbit/s

Type of modulation

Differentially encoded quadrature phase shift keying (DQPSK)

Spectrum shaping

Roll-off factor

1.0

by means of Roll-off filters 1.0

0.4

0.4

0.4

Carrier frequency of

6.0 MHz

analog sound component FM mono

5.5 MHz

FM mono

6.5 MHz AM mono

terrestrial cable

6.5 MHz

FM-Mono

Power ratio between

vision carrier and

analog sound carrier

10 dB

13 dB

10 dB

16 dB

13 dB

Power ratio between

analog and modulated

digital sound carrier

10 dB

7 dB

17 dB

11 dB

Hungary

12 dB

Poland

7 dB

8

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