Re:RNNoise: Learning Noise Suppression
by aidenn0 on Friday September 29, 2017 @02:16PM
(#15367671)
I found terminal sounds, fricatives and sibilants to be at a mininal distracting with RNN for "car" and "street", and at worst unintelligable. In particular, the terminal sound in "Christmas" was completely lost in the noise for me at 10dB with RNN, but was perfectly fine in Speex.
For "car" RNN sounded as good or better than Speex at all noise levels.
That rnn_hack is significantly better for me. 5dB on that sounds strictly better than 10dB on the original to my ear for "babble" and "street". I also noticed that the for the parts that sound the worst to me at 10-15dB in the original RNN, the signal is completely missing in the 0dB RNN version, so perhaps the signal is in the same band as the noise at that part?
Either way it's a tough tradeoff because I suspect that low bitrate encodings will love the nearly empty signal in the bands that are generated by the original, but the seemingly rectangular cutoff/introduction of the noise was much more jarring to me than the reverberation added by Speex (though I didn't like that in Speex, it didn't seem to add to my effort to understand the way that.
For "car" RNN sounded as good or better than Speex at all noise levels.
That rnn_hack is significantly better for me. 5dB on that sounds strictly better than 10dB on the original to my ear for "babble" and "street". I also noticed that the for the parts that sound the worst to me at 10-15dB in the original RNN, the signal is completely missing in the 0dB RNN version, so perhaps the signal is in the same band as the noise at that part?
Either way it's a tough tradeoff because I suspect that low bitrate encodings will love the nearly empty signal in the bands that are generated by the original, but the seemingly rectangular cutoff/introduction of the noise was much more jarring to me than the reverberation added by Speex (though I didn't like that in Speex, it didn't seem to add to my effort to understand the way that.