Mukesh- > on 2g I have observed two problem one is latency > issue and another is some time voice quality is very bad. > For latency issues i have increased latency When you say that you "increased latency" do you mean that you increased the jitter buffer depth, increased the packet time, or both? > and for other audio related problems i have wrote audio > files for iphone and simulator. > You can check these files in spokn/lib github > repository in pjsipcompilation folder . File names are > pa_mac_core_iphone.c and pa_mac_core_iphonesimulator.c . > I have use speex codec and not used G729 . With speex, what packet time are you using? 20 msec? 40 msec? -Jeff > On 12-May-2010, at 6:35 PM, Re Mo wrote: > >> That's great, thank you, I will dive into the code. >> Can you provide some details on how you resolved these issues? >> >> On Wed, May 12, 2010 at 3:50 PM, Mukesh Sharma <mukesh.s at geodesic.com> wrote: >> hi, >> we have sorted out 2g Distorted voice issue. >> u can checkout code on spokn on git hub. >> pjsip compilation and changes is in this folder lib/pjsipcompilation. >> u can check spokn which is available on app store. >> >> Regards >> Mukesh >> On 12-May-2010, at 5:29 PM, Re Mo wrote: >> >>> Dear Jeff >>> >>> 1) The example below indeed shows PCMU. I have used this for debugging purposes. Sorry for not mentioning this. >>> 2) Regarding the bandwidth - since the app calls over WiFi and not data, I think this should not be an issue. What >>> do you think? >>> >>> Thx >>> Remo >>> >>> On Wed, May 12, 2010 at 2:24 AM, Jeff Brower <jbrower at signalogic.com> wrote: >>> Remo- >>> >>> > The bad call quality on the 2G iPhone is a combination of static noise (not >>> > too loud), 'robotic' speech and some short missing bits. >>> > >>> > I gathered some info provided by PJSIP, regarding a single call I made in >>> > case it's helpful: >>> > >>> > Call time: 00h:01m:16s >>> > 1st res in 3667 ms >>> > conn in 14909ms >>> > SRTP status: Not active >>> > Crypto-suite: (null)\n #0 PCMU @8KHz >>> > , sendrecv, >>> > RX pt=0 >>> > >>> > stat last update: 00h:00m:01.497s ago >>> > total 4.3Kpkt 698.8KB (873.6KB IP hdr) @avg=63.4Kbps/79.3Kbps >>> > *pkt loss=26 (0.6%)* >>> > discrd=0 (0.0%) >>> > dup=0 (0.0%) >>> > reord=0 (0.0%) (msec) min avg max last dev >>> > *loss period: 20.000 20.000 20.000 20.000 0.000* >>> > jitter : 0.000 4.626 194.625 24.125 5.505 >>> > TX pt=0 >>> > ptime=20ms >>> >>> One thing that seems to jump out is the call is not actually using G729, as you had mentioned. Instead it's using >>> G711 uLaw. The aggregate bitrate (including IP/UDP/RTP headers) is almost 80 kbps, which would be correct for 20 >>> msec >>> G711. However, 80 kbps is too high for your 2G network max bandwidth, at least according to the bandwidth figures >>> you >>> gave previously. >>> >>> -Jeff >>> >>> > On Mon, May 10, 2010 at 4:09 PM, Jeff Brower <jbrower at signalogic.com> wrote: >>> > >>> >> Remo- >>> >> >>> >> > My iPhone app uses the PJSIP iPhone Audio driver. >>> >> > It works well on 3G & 3GS iPhones, but I am having some voice quality >>> >> issues >>> >> > on 2G iPhones. >>> >> > When making a call with a 2G iPhone, the voice is distorted and it is >>> >> > impossible to have a conversation. >>> >> > >>> >> > Did anyone experince the same issue or has any advise? this can be >>> >> related >>> >> > to PJSIP/PJSIP audio driver or the 2G iPHone CPU. >>> >> >>> >> 2nd-gen iPhones don't have as much CPU horsepower, but that's probably not >>> >> the whole issue. What does the distortion >>> >> sound like? Missing packets? Static? "Cyborg voice"? >>> >> >>> >> -Jeff >>> >> >>> >> >>> > >>> >>> >>> _______________________________________________ >>> Visit our blog: http://blog.pjsip.org >>> >>> pjsip mailing list >>> pjsip at lists.pjsip.org >>> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >> >>> Regards, >>> >>> Mukesh Sharma >>> Head - Principal Technologist | Spokn >>> Geodesic Limited | www.geodesic.com >>> Tel: +91 22 40315859 >>> >>> Mobile: +919892029162
