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參數(shù)資料
| 型號(hào)： | MSM7580 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | ITU-T G.721 ADPCM TRANSCODER |
| 中文描述： | ITU - T的G.721差分PcM碼器 |
| 文件頁(yè)數(shù)： | 16/18頁(yè) |
| 文件大?。?/td> | 207K |
| 代理商： | MSM7580 |
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Semiconductor
MSM7580
In this device, internal operating signals are generated according to the ADPCM side SYNC
(SYNCA) signal.
The timings are shouwn in the figures (a) and (b);
The arithmetic operation of CODER is performed at "A" in the figure (a).
The arithmetic operation of DECODER is performed at "B" in the figure (b).
Therefore, when the conversion delay time Tsip of the CODER is less than t1, ADPCM is output
at the timing of Tsoa.
When Tsip is more than t1, ADPCM is output at the timing of Tsoa + 125
m
s.
For DECODER, when Tsia<t3 and Tsop<t2, the conversion delay time is Tsop-Tsia.
As mentioned above, a data ship may occur at Tsip=t1 in CODER, and at Tsia=t3 and Tsop=t2
in DECODER.
Therefore, the timings of SYNC signals of both PCM and ADPCM sides should not be set up in
the range about
±
500nsec of Tsip=t1, Tsia=t3 and Tsop=t2.
For normal operation, SYNC clocks for ADPCM and PCM sides should be continuous at 8 kHz
and synchronized with each other even if their phases are different.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MSM7581 | ITU-T G.721 4ch ADPCM TRANSCODER |
| MSM7582 | pie/4 Shift QPSK MODEM |
| MSM7582B | pie/4 Shift QPSK MODEM |
| MSM7583GS-BK | pie/4 Shift QPSK MODEM |
| MSM7583 | pie/4 Shift QPSK MODEM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSM7580GS-K | 制造商:ROHM Semiconductor 功能描述: |
| MSM7581 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:ITU-T G.721 4ch ADPCM TRANSCODER |
| MSM7582 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:pie/4 Shift QPSK MODEM |
| MSM7582B | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:pie/4 Shift QPSK MODEM |
| MSM7583 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:pie/4 Shift QPSK MODEM |
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