search for: 14khz

Hi, I have ported the speex codec to PocketPC. However there are some issues coming. Firstly, i am trying to use a sampling rate of 44.1KHz and 14KHz after changing some of the code. When i try to decode and listen , there is some break in sound which occurs only at the starting of the sample file. On the first run, it works fine but the break increases upto a certain level on subsequent runs . Since speex is optimized for 8 , 16 and 32 KHz, ca...

I brought this up 12 months ago or more. I believe the low-pass filter defaults too high with quality -1 in Vorbis 1.0. Is this going to change in the future? I think it should at least cut off at 15khz not 16khz and perhaps even 14khz. I believe it's important when streaming. Removing some of the higher frequencies compared to removing more of the audible sound makes more sense to me. Sampling at 33075 is an option but this produces a cut-off at 13khz which is too low in my opinion, and 32khz samples are not as well suppo...

...ures audio frequencies up to 21khz -- almost CD quality. In my opinion -q1 (80kb/s) is producing results similar or better than mp3@128. Why not reduce the nominal bitrate down a couple of steps. Of course some additional tuning will be required. q 0.0 = 48kb/s (13khz lowpass) q 1.0 = 56 (14khz) q 2.0 = 64 (15khz) q 2.5 = 72 q 3.0 = 80 q 4.0 = 96 (default) q 5.0 = 112 q 6.0 = 128 q 7.0 = 160 q 8.0 = 192 q 9.0 = 256 q 10 = 320 This is still assuming 44.1khz sampling. I presume 22khz has it's own table of quality/nominal bitrates. Just thinking out loud. Good work Monty. Ross...

Hi, I have ported the speex codec to PocketPC. However there are some issues coming. Firstly, i am trying to use a sampling rate of 44.1KHz and 14KHz after changing some of the code. When i try to decode and listen , there is some break in sound which occurs only at the starting of the sample file. On the first run, it works fine but the break increases upto a certain level on subsequent runs . Since speex is optimized for 8 , 16 and 32 KHz, ca...

I just joined this list, so I'm not sure how many of you are already aware of this. KPFA is a 59,000 watt free speech community radio station in Berkeley, California that has been on the air since 1949. They were the first listener sponsored radio station in North America, paving the way for many other community stations across the U.S. and around the world. KPFA was one of first signals to

Hi Everyone, 1- Are the Siren7 and Siren14 the G.722 HD voice codecs? 2- Are these codecs only for Polycom units or are they universal across all other SIP phones that advertise the HD voice codec like Aastra? 3- What is the main difference between the two and is it advisable to run these over the INTERnet (not INTRAnet)? Thanks -------------- next part -------------- An HTML attachment was