MSP3400D 데이터 시트보기 (PDF) - Micronas
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MSP3400D Datasheet PDF : 83 Pages
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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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