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參數資料
| 型號： | W52905 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 音頻合成 |
| 英文描述： | ADPCM/PCM Voice Synthesizer(ADPCM/PCM話音合成器) |
| 中文描述： | 20 SEC, SPEECH SYNTHESIZER, UUC18 |
| 文件頁數： | 17/40頁 |
| 文件大小： | 190K |
| 代理商： | W52905 |
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W529XX Application Note
- 17 -
saving purposes. The role that the "PSAVE" plays in the W529XX will be described in more detail in the
following section.
11. RAMP UP/DOWN
In the past Winbond's speech synthesizers will encode a "head" and "tail" during code preparations to avoid the
pop sounds that may occur at the start or end of a voice. The following example is a typical *.out file for previous
PowerSpeech
products:
W5282
LED1
FREQ2
LED1_S_CTRL
0: 2
H4 + voice1 + 2 * voice2 + T4
END
1:
H4 + Voice3 + T4
END
In the W529XX, a new H/W mechanism automatically inserts the head (H4) and tail (T4), to eliminate the pop
sounds. The D/A converter is disabled and the PCM value and quantization pointer of the ADPCM stage are
reset to 0. This initial status will not be changed until a voice GO instruction is executed. Both the head (H4) and
the tail (T4) periods are 10.67mS.
A special point concerning power consumption and use of the "PSAVE" instruction should be mentioned. As the
"PSAVE" instruction turns off the D/A converter, it can be used to disable the output of the D/A converter when
running the "Command" instructions.
With the new mechanism for ramp up/down, it is now possible to control
the playing voice with more flexibility than before. For example, if we want two voices to be played more
continuously between their connection point, we only need to omit the "PSAVE" instruction between them. Doing
this will ensure no insertion of "head" and "tail", which may take about 21.34 ms between these two voices. If
voice continuity is more important than power consumption, then it is possible that no "PSAVE" instructions are
written into the program.
12. ADPCM/PCM SYNTHESIS
The W529XX offers an alternative to the ADPCM algorithm for voice reproduction, direct 8-bit PCM coding. This
PCM direct coding may be used for better reproductions especially for applications using high quality music
sources.
The following voice combinations show the mixing of ADPCM and PCM synthesis.
W52905
LED1
FREQ2
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W-53 | 制造商:RAF Electronic Hardware 功能描述:SPRING, COMPRESSION, 3.6N, 19.1MM; Body Length:19.1mm; Compressed Length:12mm; Compression Load Max:3.6N; External Diameter:6.35mm; Wire Diameter:0.5mm ;RoHS Compliant: Yes |
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| W530-02 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Frequency-multiplying, Peak-reducing EMI Solution |
| W530-02H | 制造商:Cypress Semiconductor 功能描述:PLL Frequency Multiplier Single 20-Pin SSOP |
| W530-02HT | 制造商:Cypress Semiconductor 功能描述: |
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