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參數資料
| 型號： | HT84192 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Magic VoiceTM |
| 中文描述： | 魔術VoiceTM |
| 文件頁數： | 11/31頁 |
| 文件大小： | 246K |
| 代理商： | HT84192 |
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HT84XXX
11
April 26, 2000
Functional Description
TheMagicVoice
TM
seriesisaseriesofprogram-
mable speech synthesizers and melody genera-
tors. It provides various sampling rates and
beats, tone levels, tempos for speech synthe-
sizer and melody generator. For voice synthe-
sizer, the Magic Voice
TM
provides 8-bit PCM,
6-bit
-law PCM and 4-bit ADPCM synthesis.
In HT84XXX series, a mixed output of two
channels PCM synthesis is allowed but only
one channel ADPCM synthesis is allowed. For
melody generator, the Magic Voice
TM
supports
a tone melody and PCM melody generator and
twochannelsmixedoutputforthewholeseries.
The Magic Voice
TM
series build-in 8 program-
mable I/O pins and 4 programmable input pins
along with powerful user s command. The
user s instructions are employed to develop
new and customized functions for a wide vari-
ety of innovative applications.
Speech and melody analysis
The speech and melody sources of the Magic
Voice
TM
can be recorded and edited from the PC
sound card and media tools. Holtek s CAD tools
first load a speech source file as .WAV or .PCM
format, then transfer the speech file as PCM,
LOG-PCM or ADPCM format, and finally save
it to the internal mask ROM by changing a
layer of the mask. The PCM format generates a
higher sound quality whereas the ADPCM for-
mat brings about a longer recording capacity.
The melody source can either be in the .MID or
in the .MLD format.
The .MID file is the standard format of the win-
dows media tools. The .MLD file is a text for-
mat. After the .MID file is compiled, the .MLD
file is automatically generated.
The Magic Voice
TM
can support the following
compression format of the voice .WAV and
.PCM file: AD4, PCM8, -law PCM.
Current type D/A output
The HT84XXX series supply two high accuracy
current type D/A output pins for audio output.
The output volume is changeable from 0 to 15
digital levels by writing a value to the VOL-
UME_n (n=1 or 2) registers. The D/A pins are
PMOS open drain structure and ouput synthe-
sized signals for driving a speaker through an
external NPN transistor when the chip is ac-
tive. However, it becomes floating when the
chip is in the standby state. An 8050 type tran-
sistor with h
FE
=150 is recommended for the
output driver of the D/A output pin.
Melody/Tone generator
The HT84XXX family has a built-in mel-
ody/tone generator. The generator can generate
13 different kinds of melody beats, 5 octaves of
tone level, 18 tempos, and 2 channels mixed
output. Of these components, the melody tempo
is changeable and generates sound effects by
writing a control value to the TEMPO register.
The chip provides the following 18 tempos, 13
beats, and 5 octaves for user s programming.
18 tempos (Beats/Min.)
68
78
82
93
100
105
109
114
119
125
132
139
147
156
179
192
227
310
13 beats
1
24,
12,
1
1
8,
1
6,
1
4,
1
3,
1
2,
2
3,
3
4,1,4
3,
3
2,2
5 octaves
C1~B1, C2~B2, C3~B3, C4~B4, C5~B5
PCM/ADPCM synthesizer
The HT84XXX family contains a PCM and
ADPCM synthesizer. The synthesizer offers a
wide range of sampling rates from 4kHz to
24kHz for PCM synthesis and 4kHz to 16kHz
for ADPCM synthesis. The sampling rate of the
synthesizer can be changed by writing a control
value to the sampling rate register. It also sup-
ports a small variety of 100Hz. For a higher
performance sound quality, the PCM coding is
required. But for a longer recording capacity,
the ADPCM coding is recommended.
相關PDF資料 |
PDF描述 |
|---|---|
| HT84384 | Magic VoiceTM |
| HT85036 | Green Voice |
| HT85048 | Green Voice |
| HT85072 | Green Voice |
| HT85096 | Green Voice |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HT84240 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Speech Synthesizer |
| HT84288 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Speech Synthesizer |
| HT84336 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Speech Synthesizer |
| HT84384 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Magic VoiceTM |
| HT84-99725 | 制造商:BITECH 制造商全稱:Bi technologies 功能描述:ADSL Coupling Transformers |
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