search for: 15kbps

I'm sorry if this message is slightly off topic, but I'd like to know an opinion from the speech compression experts reading this list. I'm using spheex to encode human voices at about 15kbps, with very good results. I was wondering if this is the best situation for my setup where I have all the voice pre compressed (not in real time) by very powerful servers with (near) unlimited processing time and computational resources and a client relatively slow (ARM4 processor at about 70MHz). T...

...2> /dev/null > /dev/null # tc qdisc del dev $DEV ingress 2> /dev/null > /dev/null # create the root qdisc tc qdisc add dev $DEV root handle 1: htb default 13 # install a root class, so that other clients can borrow from each other. tc class add dev $DEV parent 1: classid 1:1 htb rate 15kbps ceil 15kbps # now install 4 sub classes for different priorities # highest priority for low latency games like quake3 and ssh / ftp control. tc class add dev $DEV parent 1:1 classid 1:10 htb rate 7kbps ceil 15kbps \ prio 0 burst 20000b cburst 22000b # not as high but still high priority for ACK...

Francois Menard (Mailing List Account) wrote: > > did you try speex in wideband mode ... what bitrate? > > f. 15kbps mode. It does significantly better with a different speaker (the male does better than the female), as well. I'm considering purchasing a commercial PESQ license and wrap the PESQ software in a server application. I could then allow other folks to run PESQ comparisons on my server through so...

Google has given me too many responses, so I'll ask the list: Where in the Asterisk rtp source code can I find the default millisecond frame size? I've looked around for obvious pointers, but it's not clear. I'd like to "force" my Asterisk server to use a certain frame size all the time. (Of course, ideally I'd like to prefer or even force that frame size in a

I have a Smoothwall like firewall and proxy, I would like to establish a bandwidth I inside specify for each IP my network. But that I have been able to do it is to install the QoS to him but it is not sufficient. Somebody can help me? My English is very bad, pardon if this badly written, I had to use a translator.

hi, am trying speex on TI c54x dsp. does anyone has any idea whether we can make both the coder AND decoder run in about 10ms for a 20ms frame for this dsp, looking at narrowband, no VAD/CNG/VBR, using a low complexity, say 1, for a midrange bitrate, say 15kbps? was the c55 dsp able to run real-time on speex for the above configuration? can someone share their timings? tia! oh yes, just downloaded the latest revision, rev 9080 i think line 472 lsp.c else if (xout1 + xout2 < -SHL(32766,8)) should read else if (xout1 + xout2 < -...

...ing on the application though, VBR could be an option. Jean-Marc Andrea wrote: > I'm sorry if this message is slightly off topic, but I'd like to know an > opinion from the speech compression experts reading this list. > > I'm using spheex to encode human voices at about 15kbps, with very good > results. I was wondering if this is the best situation for my setup where I > have all the voice pre compressed (not in real time) by very powerful > servers with (near) unlimited processing time and computational resources > and a client relatively slow (ARM4 processo...

...what do you get? Using gcc, I think David got it down >to ~20 MIPS at 15 kbps, so I assume VisualDSP++ should be able to do >better than that. > >Cheers, > > Jean-Marc > I talked to David. He got 22 MIPS _with_ inline asm. I am getting around 34 MIPS for exactly the same mode (15kbps, complexity=1, vbr=off) without inline asm. Don't know the scores for gcc, so can't tell whether ADI compiler is better. It's surely not better than your assembler. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-d...

...; overhead. > > In the Ogg Format you have a segment table that shows the length of each > segment. When --nframes is set to the default of 1, one Speex frame equals > one > segment/packet. > > If you encode at 8kbps each segment is 0x15(21) bytes long, if you encode at > 15kbps each segment is 0x26(38) bytes long. You can easily see this if you > view > the Speex file with a Hex text editor as the segment table is the segment > size > repeated several times. > > In 15kbps mode you get 300 Speex bits in one frame. This fits in the 38 byte > segment...

...ction compared to 1 is small, but the loss in quality can be significant. > I (and others) > are running that on a TI C55xx DSP, and it runs a little under 30 MIPs when > I last checked, with no assembly optimizations. I have not tried to profile > other rates, but I did run a test at 15kbps, complexity 3, and that was 66 > MIPs. That's from 1.1.12 or svn? > People ask about guidelines for assembly optimization, and if you do some > searching, you will find some tips from Jean-Marc on where to start. Also, > if you look in the source tree for references to Blackfin o...

Hello, I'm trying to use speex for implementing a VoIP demo application using linphone on an embedded system. At the moment I'm not really able to do real time encoding, and thinking about making an assembler port for speex to the AVR32 architecture. The AVR32 is a new hybrid MCU/DSP fixed point processor running at 120Mhz in my application. Does anyone have experiences/info about the

...he length of each > > > segment. When --nframes is set to the default of 1, one Speex frame > >equals > > > one > > > segment/packet. > > > > > > If you encode at 8kbps each segment is 0x15(21) bytes long, if you > >encode at > > > 15kbps each segment is 0x26(38) bytes long. You can easily see this if > >you > > > view > > > the Speex file with a Hex text editor as the segment table is the > >segment > > > size > > > repeated several times. > > > > > > In 15kbps mod...

Hi! So here is what I got with different encoder settings; still not sure what the "best" setting is. 6kbps seems to add distortions, so I tried 12kbps. MP3-Original: LAME 3.99r, 120kbps, 44100Hz, Stereo, VBR V5 (22:23, 19.8MB) Opus (--raw-rate 44100 --bitrate 56 --vbr --comp 5): (44:45?, 23.4MB): Broken Opus (--bitrate 56 --vbr --comp 5 --ignorelength - %d): (22:23, 12.1 MB, 74kbps)

Le mar 18/11/2003 à 17:39, Allen Drennan a écrit : > Speaking of video conferencing in conjunction with Speex, we are > currently beta testing a solution we developed that offers multi-point, > multi-party video and audio using the Speex engine for voice. > > http://www.wiredred.com/downloads/ecsetup.exe > > The fair and good audio settings are Speex narrowband, high quality

..., type) >#endif > >I Initialized the global scratch pointer to the beginning of the scratch >area in the encoder init, and the debug macro keeps track of the max usage. >It may be too late in your work for this to be of any help. > I measured one mode at one complexity setting (15kbps, complexity=1). If you could publish data for other modes/complexities it would be appreciated. >>>> On the code size things are less rosy. >>>> The wideband indeed goes away with DISABLE_WIDEBAND but that's about >>>> all. >>>> Due to extensive...

...gress 2> /dev/null > /dev/null > > > > # create the root qdisc > > tc qdisc add dev $DEV root handle 1: htb default 13 > > > > # install a root class, so that other clients can borrow from each other. > > tc class add dev $DEV parent 1: classid 1:1 htb rate 15kbps ceil 15kbps > > > > # now install 4 sub classes for different priorities > > # highest priority for low latency games like quake3 and ssh / ftp control. > > tc class add dev $DEV parent 1:1 classid 1:10 htb rate 7kbps ceil 15kbps \ > > prio 0 burst 20000b cburst 22000b...

...es. I already introduced into the LSP prediction such an nbest list to do that straightforward. My goal is to make sure if nothing is embedded, the altered Speex version still needs to write exactly the same coefficients as the original non-stego version. For my scenario, I stick to NB encoding at 15kbps, so N is equal to 2. So all I can do, in my opinion, is to check if the LSBs of best_nind[0][i] and best_nind[1][i] (for each i in 0:nb_subvect) are different. The Problem is, that I would like to know how big the error is, which I introduce into the signal by this change. But in the end, I only kn...

Hello Jean-Marc, Regarding your question - a little background on the various choices, Fair Quality is 15kbps Speex narrowband, Good Quality is 24kbps Speex narrowband, High Quality is 32kbps ADPCM from HawkVoice and Toll Quality is 64kbps PCM. We also have 10 other codecs within the product including GSM, LPC and others that we currently do not expose. To us, quality is a combination of perceived voice...

Ben Greear wrote: > Francois Menard (Mailing List Account) wrote: > >> >> did you try speex in wideband mode ... what bitrate? >> >> f. > > > 15kbps mode. It does significantly better with a different > speaker (the male does better than the female), as well. Most CELP based codecs do a better job with lower pitched voices, so male voices tend to sound better than female voices. > I'm considering purchasing a commercial PESQ licen...

...the hardware design stuff ;-) I suggest that you start by looking at 8kbps, complexity 0. I (and others) are running that on a TI C55xx DSP, and it runs a little under 30 MIPs when I last checked, with no assembly optimizations. I have not tried to profile other rates, but I did run a test at 15kbps, complexity 3, and that was 66 MIPs. People ask about guidelines for assembly optimization, and if you do some searching, you will find some tips from Jean-Marc on where to start. Also, if you look in the source tree for references to Blackfin or bfin, you will find an example port done by Je...