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spandsp - A DSP library for telephony |
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SpanDSP is a library of DSP functions for telephony, in the 8000 sample per |
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second world of E1s, T1s, and higher order PCM channels. It contains low level |
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functions, such as basic filters. It also contains higher level functions, such |
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as cadenced supervisory tone detection, and a complete software FAX machine. |
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The software has been designed to avoid intellectual property issues, using |
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mature techniques where all relevant patents have expired. See the file |
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DueDiligence for important information about these intellectual property issues. |
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SpanDSP is a library of DSP functions for telephony, in the 8000 |
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sample per second world of E1s, T1s, and higher order PCM channels. It |
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contains low level functions, such as basic filters. It also contains |
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higher level functions, such as cadenced supervisory tone detection, |
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and a complete software FAX machine. The software has been designed to |
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avoid intellectual property issues, using mature techniques where all |
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relevant patents have expired. See the file DueDiligence for important |
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information about these intellectual property issues. |
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The library is licenced under the LGPL 2.1 licence. The test suite, and some support |
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programs are licenced under the GPL 2 licence. The full text of these licences can |
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be found in the file COPYING. |
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The library is licenced under the LGPL 2.1 licence. The test suite, |
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and some support programs are licenced under the GPL 2 licence. The full |
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text of these licences can be found in the file COPYING. |