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...or cases when the PCM sample values are constant (because no one is speaking), the decoded values fluctuate too. These fluatuations are causing the background noise. Is my observation expected? Thanks, Carine ----- Original Message ---- From: John Miles <jmiles@pop.net> To: Carine Liang <carineliang@yahoo.com.sg>; speex-dev@xiph.org Sent: Monday, 6 November 2006 11:52:53 AM Subject: RE: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise DIV { MARGIN:0px;} It could be a million different things, unfortunately. Focus on comparing your code to the Spee...

...9;m still getting the same constant background noise. I notice that when I talk into the mike, I will get a slightly louder noise, can't hear any clear speech... Any idea what's wrong? Regards, Carine ----- Original Message ---- From: John Miles <jmiles@pop.net> To: Carine Liang <carineliang@yahoo.com.sg>; speex-dev@xiph.org Sent: Friday, 3 November 2006 12:32:43 AM Subject: RE: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise DIV { MARGIN:0px;} Yes, it's necessary; Speex will encode signed 16-bit PCM data and decode to the same format....

...tion works fine without the codec but I need to achieve a lower data rate. Anyone has done that before? Is there anyone who's deal with encoding and decoding PCM samples in windows? Please help. Carine ----- Original Message ---- From: John Miles <jmiles@pop.net> To: Carine Liang <carineliang@yahoo.com.sg>; speex-dev@xiph.org Sent: Friday, 3 November 2006 12:32:43 AM Subject: RE: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise DIV { MARGIN:0px;} Yes, it's necessary; Speex will encode signed 16-bit PCM data and decode to the same format....

...reasons; you can hardwire them all to 0 to see if your noise goes away. Make sure the values on the decompressed (PCM) side are little-endian (low byte first in memory), assuming you're working in Windows on x86. -- john RAD Game Tools -----Original Message----- From: Carine Liang [mailto:carineliang@yahoo.com.sg] Sent: Sunday, November 05, 2006 8:38 PM To: John Miles; speex-dev@xiph.org Subject: Re: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise Hi John, I noticed the values after decode is very much different from the values of the original PCM...

...coded output expected? Since I'm dealing with a 8 bit sample, am I right to say that I will not have the "big/little endian" issue? What has gone wrong??? Regards, Carine ----- Original Message ---- From: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> To: Carine Liang <carineliang@yahoo.com.sg> Cc: John Miles <jmiles@pop.net>; speex-dev@xiph.org Sent: Monday, 25 December 2006 10:22:44 AM Subject: Re: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise Have you tried starting with sampleenc/sampledec instead of doing everything from scr...

...my output device is in 8-bit mode, same as my input mode. I'm actually working in char (8 bit) arrays. Is it necessary to work in signed short integers only? I changed all the short arrays in the example to char. Carine ----- Original Message ---- From: John Miles <jmiles@pop.net> To: carineliang@yahoo.com.sg; speex-dev@xiph.org Sent: Thursday, 2 November 2006 2:04:39 PM Subject: RE: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise DIV { MARGIN:0px;} At first glance it looks like you are opening the output device in 8-bit mode (m_waveFormatEx.wBitsP...

...e RecBuffer. The RecBuffer must be set to 320bytes instead of 160 bytes since every sample is now 16 bit. The compression is amazing, from 320 bytes to 38bytes! Thanks a million, Carine ----- Original Message ---- From: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> To: Carine Liang <carineliang@yahoo.com.sg> Cc: speex-dev@xiph.org Sent: Tuesday, 26 December 2006 6:58:06 PM Subject: Re: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise > Thanks. I've got the code for sampleenc and sampledec. But I didn't > know how to verify whether the dec...

Hi, Can someone please help me with my problem below. Any suggestions is appreciated. thanks, Carine ----- Original Message ---- From: Carine Liang <carineliang@yahoo.com.sg> To: speex-dev@xiph.org; speex-dev@xiph.org Sent: Tuesday, 31 October 2006 1:05:49 PM Subject: [Speex-dev] Integrating speex with VideoNet application: Constant background noise Hi, I am developing a peer-to-peer video conference application which uses speex as a codec for the voi...

Hi, I am developing a peer-to-peer video conference application which uses speex as a codec for the voice. I am new to speex, so please bear with me if I asked the obvious. After I added the encode and decode function to my MFC app, I heard a constant background noise, even when no one is speaking into the microphone. #define FRAME_SIZE 160 The application is coded in MFC C++. The record