search for: 18kbps

It is commonly said here that if I want to make AM radio-quality stuff at very low bitrates, a good way is to downsample. I downsampled a song to 11025Hz mono and encoded with -q 0, the result is about 18kbps and is at least radio quality. The downsampler I used is from Edinburgh speech tools, named ch_wave. `sox' performs terribly, so I didn't use it. However, I heard some unpleasant sound at relatively high frequencies in the *downsampled WAV file*, but not in the encoded OGG file. So I ass...

I have an installation that connects in a [very] good day at 22kbps, but the normal is about 18kbps. I use de ILBC codec, and also change in iax.conf the trunkfreq = 20 to trunkfreq = 30 It works, you can understand well the other person, but don't expect miracles or an outstanding sound quality. > Dear Dan; > > Thanks alot for your kindly reply. > > Well, what u advise us...

...X2 and I try iLBC, gsm, g729 and speex and the minimun bandwidth was 38 Kbps for 1 channel. What the parameters do you set to have this rate ??? Thank you. Miguel Ruiz Velasco Sobrino wrote: > I have an installation that connects in a [very] good day at 22kbps, but the normal is > about 18kbps. > I use de ILBC codec, and also change in iax.conf the > trunkfreq = 20 > to > trunkfreq = 30 > > It works, you can understand well the other person, but don't expect miracles or an > outstanding sound quality. > > > >>Dear Dan; >> >>Thanks...

...class ( rate UPRATE, ceil UPRATE ) { $prio = class ( prio 0, rate 6kBps, ceil UPRATE ) { sfq; } ; $p2p = class ( prio 7, rate 1kBps, ceil P2P ) { sfq; } ; $interactive = class ( prio 1, rate 18kBps, ceil UPRATE ) { sfq; } ; } } } } CLASSES class htb 2:1 root rate 200000bit ceil 200000bit burst 1624b cburst 1624b class htb 2:2 parent 2:1 leaf 3: prio 0 rate 48000bit ceil 200000bit burst 1605b cburst 1624b class htb 2:3 parent 2:1 leaf 4: prio...

Hi guys, I'm using Opus for speech in wide-band mode (sampling rate 16000) and 20ms frames with signal type set to SIGNAL_VOICE. I have a few questions here: 1. When I choose VBR mode, the codec seems to choose the bitrate on its own. However, that seems to be an issue on mobile devices. In some cases, when I configure the bitrate to say 20kbps, I see that the outgoing codec bitrate at