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| 型號： | NSAM265SRA |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | CompactSPEECH Digital Speech Processors |
| 中文描述： | CompactSPEECH數(shù)字語音處理器 |
| 文件頁數(shù)： | 30/58頁 |
| 文件大?。?/td> | 712K |
| 代理商： | NSAM265SRA |
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(Continued)
TABLE 3-1. Tunable Parameters
(Continued)
Index
Parameter Name
Description
Default
10
VOXDENERGYDTHRESHOLD
This constant determines the minimum energy level at which voice is
detected. Below this level, it is interpreted as silence. If you divide
(multiply) the value by 2 you get 3 dB decrease (increase) in the
threshold.
12
Legal values: 0 to 65535.
11
Reserved
D
12
VOXDTIMEDCOUNT
This constant, in units of 10 ms, determines the period of silence
700
Legal values: 0 to 65535.
13–14
Reserved
D
15
VOICEDSYNTHESISDLEVEL
Controls the energy level at which internal vocabulary words are
output. Each unit represents 3 dB. The default level is the reference
level. For example, if you set this parameter to 4, the energy level is
6 dB less than the default level. The actual output level is the sum of
VOICEDSYNTHESISDLEVEL and the VOLDLEVEL variable,
controlled by the VC (Volume Control) command. The synthesized
speech is distorted when the level is set too high. The valid range is:
6
0
s
VOICEDSYNTHESISDLEVEL
a
VOLDLEVEL
s
12.
16
TONEDGENERATIONDLEVEL
Controls the energy level at which DTMF and other tones are
generated. Each unit represents 3 dB. The default level is the
reference level. For example, if you set this parameter to 4, the
energy level is 6 dB less than the default level. The actual output level
is the sum of TONEDGENERATIONDLEVEL and the VOLDLEVEL
variable, controlled by the VC command. The tones are distorted
when the level is set too high. The valid range is:
6
0
s
TONEDGENERATIONDLEVEL
a
VOLDLEVEL
s
12.
17
Reserved.
D
18
TONEDTIMEDCOUNT
Controls the duration of a tone before it is reported as a dial tone,
in 10 ms units.
700
Legal values: 0 to 65535.
19
TONEDONDENERGYDTHRESHOLD
Minimum energy level at which busy and dial tones are detected as
ON (after 700 Hz filtering). If you divide (multiply) the value by 2 you
get 3 dB decrease (increase) in the threshold.
160
Legal values: 0 to 65535.
20
TONEDOFFDENERGYDTHRESHOLD
Maximum energy level at which busy and dial tones are detected as
OFF (after 700 Hz filtering). If you divide (multiply) the value by 2 you
get 3 dB decrease (increase) in the threshold.
110
Legal values: 0 to 65535.
21
VCDDLEVEL
Controls the energy during playback and external voice synthesis.
Each unit represents 3 dB. The default level is the reference level. For
example, if you set this parameter to 4, the energy level is 6 dB less
than the default level. The actual output level is the sum of VCDD
LEVEL and the VOLDLEVEL variable, controlled by the VC
command. The speech is distorted when the level is set too high. The
valid range is:
6
0
s
VCDDLEVEL
a
VOLDLEVEL
s
12.
22
VOXDTOLERANCEDTIME
Controls the maximum energy period, in 10 ms units, that does NOT
reset the vox detector.
3
Legal values: 0 to 255.
23
MINDBUSYDDETECTDTIME
Minimum time period for busy detection, in 10 ms units.
600
Legal values: 0 to 65535.
30
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