I'd really like to hear what the noisy BRIL examples sound with a simple low-cut circuit. The "noise" is in the very low frequencies which sounds like it'd clean up nicely by just attenuating the bass response (which all good communications receivers do for just that reason.)
I can understand how the sort of noise reduction offered by SANR would produce less fatigue over time, but frankly I find the audio more intelligible *before* reduction than it is after in almost all cases. While some examples remove minor background hiss, the negative effects on the desired audio is very distracting and impairs intelligibility to me. The only example where I'd appreciate the noise reduced output was the Stationary 4-Harmonic Noise. In that case it was easier to hear clearly what the voice said in spite of the severe distortion introduced by the processing. Ron AC7AC -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of James Sarte (K2QI) Sent: Tuesday, November 30, 2010 8:11 PM To: Guy Olinger K2AV Cc: Elecraft Reflector Subject: Re: [Elecraft] Noise Reduction Hi Guy, I'd have to agree with you there. I think the algorithm used by the BHI device sounds much better than the BRIL offering. 73, James K2QI On Tue, Nov 30, 2010 at 9:13 PM, Guy Olinger K2AV <[email protected]>wrote: > Well, I listened to the demo's and to MY ears, it seemed ineffective, > removing the voice entirely at some points. The "cleaned" output was > harsh and very treble, and seemed little more than a high pass filter. > IMHO, this one is clearly inferior to the K3. If it was one of the > choices, it would be complained about a lot, though as completely > subjective as people are on this topic, some would probably like it. > > 73, Guy. > > On Tue, Nov 30, 2010 at 2:59 PM, JAMES ROGERS <[email protected]> wrote: > > Personally I am quite happy with the solutions offered with the K3. I > > had no problem finding the "sweet spot" for my noise environment. But > > for those that wish more, take a look at this site. For a licensing > > fee you can have BRIL ....... > > > > "BRIL is a new proprietary algorithm has been recently developed for > > adaptively estimating and removing background noise from speech > > signals. Unlike noise reduction and speech enhancement algorithms > > currently available on the market, the new algorithm is capable of > > cleaning noisy speech even in severe noisy environments without any > > distortion to the speech signal. The algorithm has been successfully > > used in many communication systems with high level of noise. BRIL is > > suitable for many applications such as car kits, mobile telephony, > > conferencing, speech recognition, Internet phones, etc." > > > > They offer a demo where it seems you can play with setting various > > parameters. > > > > http://www.dspalgorithms.com/products/nr.html > > > > > > JIM ROGERS > > [email protected] > > http://web.me.com/jimrogers_w4atk ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
