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| 型號(hào)： | HT81R36 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | EasyVoice Speech |
| 中文描述： | EasyVoice講話 |
| 文件頁(yè)數(shù)： | 10/19頁(yè) |
| 文件大小： | 230K |
| 代理商： | HT81R36 |
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HT81XXX
Rev. 1.40
10
March 1, 2005
Functional Description
The EasyVoice
TM
is voice synthesizer with 6, 9, 12, 18 or
36-second voice capacity. A group of pre-recorded voice
sections is played upon receipt of key trigger input sig-
nals. Two FLAG signals are output while playing voices.
The HT81XXX voice capacity can be divided into sec-
tions of arbitrary length. Notice that the silence length
and end-pulse width are not included in the memory.
By using Holtek s programming tools (HT-VDS81W),
the contents and arrangement of sections, as well as
key features and FLAG output are all programmable be-
fore device fabrication.
The IC provides 6 direct key inputs (KEY1~KEY6),
KEY1 can be optioned as a direct, sequential trigger
key. KEY2~KEY6 can be selected as a stop or a direct
key.
The IC provides matrix key (KEY1~KEY8), 6 program-
ming pins (KEY1, KEY2, KEY3, KEY4, I/O1 and I/O2)
can be divided to 8 key that can be optioned as normal
or one shot trigger.
Play Function Block Diagram
System Oscillator
The EasyVoice
TM
has a built-in RC oscillator which re-
quires only one external resistor for normal applications.
The oscillator frequency is typically 2MHz for an exter-
nal resistor of 150k . The required oscillator frequency
may vary with different sampling rates in the process of
voice programming. As a result, the value of the oscilla-
tor resistor may be different with respect to different
items.
The oscillator is turned on when triggered by a key input.
After playing, it is immediately turned off. Then the chip
goes into the standby state.
Voice ROM
ThevoiceROMisoriginallydesignedtocontinuouslyre-
cord the 6, 9, 12, 18 or 36-sec voice data at about 5kHz
sampling rate. A higher sampling rate will generate
voices of better playback quality, but will shorten the to-
tal recording time. On the other hand, a lower sampling
rate will result in longer recording time but sacrifice the
voice quality.
The playback time can be significantly extended by
making use of coding efficiency, silence playing, section
repeating, section cascade, etc.
Section
Section is the basic element constituting the contents of
the voice ROM. During programming, the customer￠s
voice sources can be divided into as many sections as
required. Asection can be composed of a voice or an in-
terval of silence. However, the silent length is not
counted in the voice ROM. The total number of sections
included should be less than 240 due to the space limi-
tation of the function table ROM. The total length of the
included sections is limited by the voice ROM.
A section, when triggered by a key input, can be played
once, repeatedly or cascaded with other sections, de-
pending on the key function table instructions.
The following are examples of section division:
In addition, a section can be set as retriggerable or
non-retriggerable depending on code option.
Retriggerable
When the currently playing section is set as
retriggerable, it will stop immediately upon receipt of
other key inputs.
Non-retriggerable
When the currently playing section is selected as
non-retriggerable, it will go on playing until the whole
section is completed, whether or not there is a key in-
put in the process of playing.
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT81XXX | EasyVoiceTM Speech |
| HT82A821R | USB Audio MCU |
| HT82A821R_07 | USB Audio MCU |
| HT82A822R | USB Audio MCU |
| HT82A822R_07 | USB Audio MCU |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT81XXX | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:EasyVoiceTM Speech |
| HT82003(28SDIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Asynchronous Up Counter |
| HT82003(28SOP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Asynchronous Up Counter |
| HT82011(28SDIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Speech Synthesizer |
| HT82011(28SOP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Speech Synthesizer |
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