Re: [asterisk-users] OSLEC vs HPEC vs Octasic
2008/7/21 Loic Didelot [EMAIL PROTECTED]: Hello, I am trying to figure out which soft echo canceller I could use. There is OSLEC, HPEC from Digium and Octware from Octasic. I thought HPEC was licenced by Digium from Octasic (ie those 2 software are the same). Maybe someone should correct me ... I have problems to find details about their CPU needs. Can anyone share his experience. What CPU and Memory is required for 2,4,8 and 16 channels? Any help is appreciated. Best regards, Loic Didelot. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] OSLEC vs HPEC vs Octasic
Olivier wrote: I thought HPEC was licenced by Digium from Octasic (ie those 2 software are the same). Maybe someone should correct me ... That is not correct; HPEC is a G.168 line echo canceller from Adaptive Digital Technologies. The same algorithm (but not the same source code) is used on the VPMADT032 module, which is available for all Digium analog line interface cards and single-span T1/E1/J1 interface cards. -- Kevin P. Fleming Director of Software Technologies Digium, Inc. - The Genuine Asterisk Experience (TM) ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] OSLEC vs HPEC vs Octasic
On Mon, 21 Jul 2008, Loic Didelot wrote: Hello, I am trying to figure out which soft echo canceller I could use. There is OSLEC, HPEC from Digium and Octware from Octasic. I have problems to find details about their CPU needs. Can anyone share his experience. What CPU and Memory is required for 2,4,8 and 16 channels? Any help is appreciated. I switched to OSLEC after testing HPEC on TDM400 boards, and found that it worked much better and wasn't limited to the restricted mechanism Digium uses for licensing (unlikely as it sounds, I have some clients who do not have a connection to the public Internet, and never will for their phone system) It also passes the wife test which HPEC didn't. It's also free (OS as in Open Source), which HPEC isn't, although that wasn't my primary reason for using it - ease of use and workability was. As far as CPU usage is concerned, OSLEC gave me the tools to find that out - I didn't find any such tools with HPEC, but they might be there somewhere. On one of my production PBXs - a 1GHz VIA processor, 128KB cache, OSLEC can do the following: (running their own speedtest program) Testing OSLEC with 128 taps (16 ms tail) CPU executes 996.06 MIPS - Method 1: gettimeofday() at start and end 268 ms for 10s of speech 26.69 MIPS 37.31 instances possible at 100% CPU load Method 2: samples clock cycles at start and end 26.69 MIPS 37.31 instances possible at 100% CPU load Method 3: samples clock cycles for each call, IIR average cycles_worst 186709 cycles_last 43447 cycles_av: 4272 34.18 MIPS 29.15 instances possible at 100% CPU load So at worst, it's saying it can handle 29 incarnations, and at best, 37 - that's assuming no other CPU load such as transcoding. So it's well capable of handing your requirements of 16 channels - more-so if you're using a server class box, and not the embedded type systems I'm using here. (On my dev box, an older 2GHz Celeron, 128KB cache, it's telling me it can do 120 incarnations, and on a 2.4GHz Xeon with 4MB cache, it said it could do 321) Gordon ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] OSLEC vs HPEC vs Octasic
Gordon Henderson wrote: So at worst, it's saying it can handle 29 incarnations, and at best, 37 - that's assuming no other CPU load such as transcoding. So it's well capable of handing your requirements of 16 channels - more-so if you're using a server class box, and not the embedded type systems I'm using here. (On my dev box, an older 2GHz Celeron, 128KB cache, it's telling me it can do 120 incarnations, and on a 2.4GHz Xeon with 4MB cache, it said it could do 321) Those numbers are with a 16ms tail, which is very short, and unlikely to be an adequate echo tail for connection to the PSTN (although fine for analog phones). A more normal configuration would be 32, 64 or 128 millisecond tails, which would cut those numbers down by a factor of 2, 4 or 8. -- Kevin P. Fleming Director of Software Technologies Digium, Inc. - The Genuine Asterisk Experience (TM) ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] OSLEC vs HPEC vs Octasic
Kevin P. Fleming wrote: Olivier wrote: I thought HPEC was licenced by Digium from Octasic (ie those 2 software are the same). Maybe someone should correct me ... That is not correct; HPEC is a G.168 line echo canceller from Adaptive Digital Technologies. The same algorithm (but not the same source code) is used on the VPMADT032 module, which is available for all Digium analog line interface cards and single-span T1/E1/J1 interface cards. G.168 is not an algorithm. Its a test spec. These cancellers all use related, but different, algorithms. Steve ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] OSLEC vs HPEC vs Octasic
Thank you for you answers. So what tail would be suggested for SIP - LOCAL LAN - Asterisk - ISDN/BRI ? Is HPEC more or less resource hungry compared to OSLEC? Best regards, Loic Didelot. On Mon, 2008-07-21 at 06:54 -0500, Kevin P. Fleming wrote: Gordon Henderson wrote: So at worst, it's saying it can handle 29 incarnations, and at best, 37 - that's assuming no other CPU load such as transcoding. So it's well capable of handing your requirements of 16 channels - more-so if you're using a server class box, and not the embedded type systems I'm using here. (On my dev box, an older 2GHz Celeron, 128KB cache, it's telling me it can do 120 incarnations, and on a 2.4GHz Xeon with 4MB cache, it said it could do 321) Those numbers are with a 16ms tail, which is very short, and unlikely to be an adequate echo tail for connection to the PSTN (although fine for analog phones). A more normal configuration would be 32, 64 or 128 millisecond tails, which would cut those numbers down by a factor of 2, 4 or 8. -- Loïc DIDELOT MIXvoip S.a. [EMAIL PROTECTED] http://www.mixvoip.com ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] OSLEC vs HPEC vs Octasic
Loic Didelot wrote: Thank you for you answers. So what tail would be suggested for 64ms Doug -- Ben Franklin quote: Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] OSLEC vs HPEC vs Octasic
Kevin P. Fleming wrote: Gordon Henderson wrote: So at worst, it's saying it can handle 29 incarnations, and at best, 37 - that's assuming no other CPU load such as transcoding. So it's well capable of handing your requirements of 16 channels - more-so if you're using a server class box, and not the embedded type systems I'm using here. (On my dev box, an older 2GHz Celeron, 128KB cache, it's telling me it can do 120 incarnations, and on a 2.4GHz Xeon with 4MB cache, it said it could do 321) Those numbers are with a 16ms tail, which is very short, and unlikely to be an adequate echo tail for connection to the PSTN (although fine for analog phones). A more normal configuration would be 32, 64 or 128 millisecond tails, which would cut those numbers down by a factor of 2, 4 or 8. If you try capturing echoes from real phone calls you will find very few exceeding 16ms, even for long distance calls. This is probably because the network has a canceller which you can't normally disable for a voice call. If you send a 2100Hz beep at the start of the call, you may then see much longer echoes appear. This is the echo canceller disable tone, which modems send to clear any networks cancellers from the line. The nature of modems means they need to do their own end to end cancellation, and that canceller certainly does need to cover a lot more than 16ms. Regards, Steve ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] OSLEC vs HPEC vs Octasic
Steve Underwood wrote: G.168 is not an algorithm. Its a test spec. These cancellers all use related, but different, algorithms. Yeah, that's what I get for emailing before breakfast :-) There is a missing 'compliant' in that sentence... -- Kevin P. Fleming Director of Software Technologies Digium, Inc. - The Genuine Asterisk Experience (TM) ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
