similar to: Speex optimization and 12 bits conversion for 12 bits ADC

Hi?Jean-Marc? Thanks for your suggestions very much! > > I am porting speex on ARM7TDMI, I have done some optimization, the > > result is that the encoder and decoder need about 60 MCPS for 5.96kbps > > bitrate and complexity 0. Can someone give me informtion about Speex > > optimization on ARM7? > > That's quite good. A few suggestions here: > 1) Don't

> I am porting speex on ARM7TDMI, I have done some optimization, the > result is that the encoder and decoder need about 60 MCPS for 5.96kbps > bitrate and complexity 0. Can someone give me informtion about Speex > optimization on ARM7? That's quite good. A few suggestions here: 1) Don't use complexity 0 unless you're really desperate (the CPU gain over complexity 1 is

Hi! I have some questions about that functions: fir_mem16, iir_mem16 and filter_mem16. Filtering is very slow on TI DSP, and i want to optimise it. Can somebody give me formulas which discribe work of this filters? Or any suggestions about how to transform code for better performance. I going to implement this functions in assembler, but it is hard to do without full understanding how functions

-----Original Message----- From: Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> To: ??????? ??????? <altersoft at mail.ru> Date: Sat, 02 Aug 2008 07:54:34 -0400 Subject: Re: [Speex-dev] fir_mem16,iir_mem16 and filter_mem16 optimisations > > ??????? ??????? a ?crit : > > I have some questions about that functions: fir_mem16, iir_mem16 and filter_mem16. > >

> -----Message d'origine----- > De : Jean-Marc Valin [mailto:jean-marc.valin at usherbrooke.ca] > Envoy? : dimanche, 14. juin 2009 20:46 > ? : Stephane Lesage > Cc : speex-dev at xiph.org > Objet : Re: [Speex-dev] Resampler saturation > > Just to make sure I understand, the two patches you sent are > two different ways to fix the problem, with the only >

> Yes, I have enabled the the current ARM4 assembly bits. I have tried > to optimize these functions(filter_mem16(),iir_mem16() and > fir_mem16()) in C code, but the effect is very small, and I am going > to do assembly optimization for these functions. Do you have another C > code about these functions for assembly optimisations? Can you give me > some information and

Jean-Marc Valin wrote on 8/20/2007 3:48 PM: > Hi Oleg, > > Turns out the problem was only triggered with DTX on. I just committed a > fix in svn/git. Let me know if it works for you now. > > Thanks again for reporting the bug. > > Jean-Marc > Thank you, problem is gone now! Oleg PS. I just finished math_approx.asm (speed optimized version for ARM). The code can be

Dear Sirs, I would be interested to hear your views on whether SPEEX could be made to run fast on a DSPIC33 by the following strategy: Make iir_mem16() (for example) purely 16 bit by restricting the number of bits in the signal to say 10 using SATURATE and then making the LPC co-efficients just 6 bits. At present (with standard code) the encode function is taking about 140ms which is seven

Hi all Speexers, I've done some optimization to current SVN fixed-point on ARM9E platform. If the RVDS simulator gives the MCPS(Million Cycle Per Second) value A, then actual MCPS on real CPU will be around 2*A. I don't know what cause the big gap between the simulator and real CPU. What do you think? BR, Lianghu -------------- next part -------------- An HTML attachment was

Hi All, Some time ago I emailed this list and mentioned (as well as a couple of techinical queries) that I was trying to contact the PRS for information on the copyright licencing requirements of a non-profit on-line radio station, a few people expressed interest in this and asked I keep them updated. Well I just sent my third email (transcript below) informing them that I will assume a further

Does anyone have an (overhead) paging system that they like that works with SIP? We've got a client with an old paging system that (supposedly) just takes an rj11 POTS connection, but when we put an SPA Cisco adapter on it, it doesn't auto-answer the call, so paging never happens. [cid:image001.png at 01D4DFF6.9C1F1AA0] Michael J. Munger, dCAP, MCPS, MCNPS, MBSS Microsoft Certified

Hi I want to port speex to my pocket PC iPAQ1945 which has a Samsung processor 2410, an ARM9-based processor. I would like to write the specific optimized code for this chip. I had some experience at DSP chip and fixed-point coding but know nothing about embedded system and ARM. Could someone tell me some hint how to write optimized code for this pocket PC. If you can give me some links that will

The attached patch eliminates some warnings while compiling for ARM4 targets. It also simplifies the asm constraints a bit. Now we can use the ARM4 optimisations when compiling for PortalPlayer targets in Rockbox. Cheers, Dan -------------- next part -------------- A non-text attachment was scrubbed... Name: speex_arm4.patch Type: text/x-diff Size: 1550 bytes Desc: not available Url :

I have found that filter_mem2 fixed point does not match the inlined assembly version for arm4. Looking closer there appears to be an off by one error. It occurs when setting the value of mem at the end of the inner loop. In the C fixed point version this is done with a subtract. In the arm4 version instead of multiplying den by yi, it is multipled by nyi and then an add is done. This

Hi Jean-Marc, Thanks for the quick response. Here are the numbers for our little ARM systems: CPU: ARM920T, 200Mhz Speex specs: Complexity 2, 5.95Kbps Encoding: ~30%, Decoding: ~4%, with Echo Cancellation / Pre-processor: > 85% Compilation: arm-linux-gcc -pipe -Wall -W -O2 arm-linux-g++ -pipe -fno-exceptions -fno-rtti -Wall -W -O2 Configuration: --host=arm-linux

Of course we all know these groups would certainly not appreciate the audible distrobution of their bread and butter. However, I assume your scope is only within the U.S. , whereas personaly in Canada. Our laws governed a right to freedom of information in regards to online content. More or less, if you find it online it must be public content (unless that's been changed by now, I haven't

Dan Everton a ?crit : > Just one minor issue while building for ARM4 targets. The prototype for > the normalize16 function hasn't been updated in filters_arm4.h. The > attached patch should fix that. Patch applied. Thanks. In case you're interested, there's plenty of ARM4 optimisations that need to be updated (since 1.1.12) :-) > Apart from that, the 1.2beta2 release is

Hi, I am attempting to port the speex library to TI Davinci DM35x Family. My questions are: 1. What is the best ./configure option for it? Is it ARM5e / ARM4 ? when I tried these two the during the compiled a warning "I suppose you can have a [ARM4/ARM5E/Blackfin] that has float instructions?" 2. is there any available demos for the echo cancellation because I can get it

Hi everyone, I'm planning on releasing Speex 1.2beta2 in the next few days. I'd appreciate if everyone could try and test the current svn to make sure no bug crept in for your favourite plarform/application. Cheers, Jean-Marc

*Problem I want to solve:* We have 3 sites: A, B, and C. Network admins should have access to all three. (this works as-is). Desktop support should only have access to their site. (Tech A to site A, Tech B to site B, Tech C to site C). *How I think I can do it:* Working with keys? Admin's public key will be on all the client machines, and thus, the client machines will always