MSP3415D データシートの表示（PDF） - Micronas

部品番号

コンポーネント説明

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MSP3415D

Multistandard Sound Processors

Micronas 

MSP 34x5D

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 bit/sample

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

ples (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

Carrier frequency of

digital sound

Transmission rate

Type of modulation

Spectrum shaping

Roll-off factor

Carrier frequency of

analog sound component

Power ratio between

vision carrier and

analog sound carrier

Power ratio between

analog and modulated

digital sound carrier

I

6.552 MHz

B/G

5.85 MHz

L

5.85 MHz

D/K

5.85 MHz

728 kBit/s

Differentially encoded quadrature phase shift keying (DQPSK)

by means of Roll-off filters

1.0

0.4

0.4

0.4

6.0 MHz

FM mono

5.5 MHz

FM mono

6.5 MHz AM mono

terres-

trial

cable

6.5 MHz

FM mono

10 dB

13 dB

10 dB

16 dB

13 dB

10 dB

7 dB

17 dB

11 dB

Hungary

12 dB

Poland

7 dB

8

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