Article View: sci.electronics
Article #1001Re: RS-232 for voice
From: Frederic W. Brehm
Date: Thu, 27 Jul 1989 18:19
Date: Thu, 27 Jul 1989 18:19
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In article <8616@cbnews.ATT.COM> knt@cbnews.ATT.COM (kirk.n.trost) writes: > >Can fairly good sounding voice be sent digitized over >RS-232 ??? About 10 years ago, I visited KDD Laboratories in Tokyo. They showed a demo of sending compressed continuous speech over a 1200-baud RS-232 channel (actually CCITT V.2?). The speech was understandable, but it was difficult to identify the speaker. Higher speeds would allow less draconian compression methods, and better quality. I think that telephone-bandwidth speech at 64K bits/sec does not need to be compressed (someone in your company should know). But they were using a synchronous (not asynchronous :-) signalling method over RS-232. Are you asking if speech can be sent over a standard asynchronous 8-bit data without parity + 1 start bit + 1 stop bit terminal port? What speed? How good is "fairly good"? Fred -- Frederic W. Brehm Siemens Corporate Research Princeton, NJ fwb@demon.siemens.com -or- princeton!siemens!demon!fwb
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!leah!rpi!nyser!njin!princeton!siemens!demon!fwbReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!leah!rpi!nyser!njin!princeton!siemens!demon!fwb From: fwb@demon.siemens.com (Frederic W. Brehm) Newsgroups: sci.electronics Subject: Re: RS-232 for voice Message-ID: <12663@siemens.siemens.com> Date: 27 Jul 89 18:19:25 GMT References: <8616@cbnews.ATT.COM> Sender: news@siemens.siemens.com Reply-To: fwb@demon.UUCP (Frederic W. Brehm) Distribution: usa Organization: Siemens Corporate Research Lines: 22