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crackintosh
Guest
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 07 Feb 2002 10:48 |
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| The circuit of the compressor of a speech signal for transiver is necessary.
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zorro
Joined: 06 Sep 2001
Posts: 319
Helped: 34
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| 07 Feb 2002 14:54 |
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Hi cr(at)ckintosh,
surely you are looking for a syllabic compressor/expander (not a digital coder).
If so, look for data sheets, application notes, etc of compandors (NE571, NE572 or others).
Regards
Z
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loki
Joined: 12 Jan 2002
Posts: 30
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| 07 Feb 2002 16:39 |
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More specifically, are you looking for
a-law, mu-law, adpcm, celp, etc?
Are your in/out signals in the digital or analog domain?
Loki.
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sda
Joined: 22 Apr 2002
Posts: 117
Location: Greece
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| 24 Apr 2002 22:52 |
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Here's a link for a nice circuit
http://graffiti.virgin.net/ljmayes.mal/comp/comp.htm
Or if you are looking for something simple and don't care much about the harmonic contents added (being for speech), try this one
http://www.geocities.com/ResearchTriangle/Lab/1635/circuits/circ05.html
Cheers
sda
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algilsan
Joined: 20 Jan 2002
Posts: 120
Helped: 1
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| 20 May 2002 17:13 |
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| check audio codecs in internet
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