[TenTec] Omni Speech Processor

[amsctalx at comcast.net]

Certainly it can be done; digital signal processing is a matter of applying a function to any given digital representation of an analog signal. Audio compression is, at first glance, relatively simple - add amplitude to signals below a particular threshold, and reduce amplitude for signals below a particular threshold. In practice, raising the intelligibility of speech isn't the easiest thing in the world to understand, much less realizing in software or silicon. I think this is why many radios still use "RF" compression, often in conjunction with "audio" compression. It works and it's easy. As someone that has written an ASIC mask of a compander algorithm (I didn't write the algorithm), this isn't nearly as easy to implement as the classic SSB-RF speech processor circuit. 

But the original poster's question - why offer the 715 as an accessory for the Omni VII - is answered best by the people that have listened to my audio. No fiddling with the built-in DSP got me the same results as the two minutes spent adjusting the 715. 


Mike Alexander - N8MSA 

amsctalx at comcast.net 

----- Original Message -----
From: "Barry N1EU" <barry.n1eu at gmail.com> 
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com> 
Sent: Tuesday, November 29, 2011 2:14:39 PM 
Subject: Re: [TenTec] Omni Speech Processor 

On Tue, Nov 29, 2011 at 2:05 PM, Carl Moreschi <n4py2 at earthlink.net> wrote: 
> I would certainly think it can be done. I thought the DSP speech 
> processor in the Orion was very good and maybe even as good as the 715. 
> Especially the one in Version 1 firmware. 
> 

Yes, the v1 speech processor in the Orion was THE best speech 
processor I've ever encountered in any radio. The v2 speech 
processor acts quite differently. 

Barry N1EU 
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