ADPCM decoder required

Started by Sanjam in Audio Signal Processing12 years ago

Hi all. I am recording voice using ML2390 codec. It records speech in the ADPCM format. Now I wish to listen to the recorded data to validate...

Hi all. I am recording voice using ML2390 codec. It records speech in the ADPCM format. Now I wish to listen to the recorded data to validate whatever I have recorded. I need an ADPCM decoder for that. I tried out downloading numerous ADPCM players and decoders from the net but none proved to be useful. Can anyone come up with some solid solution for the same.? How can I use G.726 standar...


Applying ADPCM g726

Started by genesisleo in Audio Signal Processing14 years ago

Hi, I'm having a problem with my adpcm codec and I will appreciate any advices/suggestions given. I have downloaded my g726 adpcm codes...

Hi, I'm having a problem with my adpcm codec and I will appreciate any advices/suggestions given. I have downloaded my g726 adpcm codes onto a dsp(c5510) and I fed in an analog signal(sound card output) into the processor. The output is however disappointing as there were a lot of noise and static. The functionality of the adpcm codes is not in doubt as I had used the ITU test vectors


3-bit ADPCM playback

Started by Meenakshi Matai in Audio Signal Processing14 years ago

Hello, I am looking for a plugin that can playback G.723 3-bit ADPCM encoded data. I know that the standard .wav file header can take the...

Hello, I am looking for a plugin that can playback G.723 3-bit ADPCM encoded data. I know that the standard .wav file header can take the following information: *Code* *Description* 0 (0x0000) Unknown 1 (0x0001) PCM/uncompressed 2 (0x0002) Microsoft ADPCM 6 (0x0006) ITU G.711 a-law 7 (0x0007) ITU G.711 ?-law 17 (0x0011) IMA ADPCM 20 (0x0014) ITU G.723 ADPCM (Yamaha) 49 (0x0031)


adpcm vox...

Started by simonpalexander2000 in Audio Signal Processing16 years ago

Hiya all, I'm trying to write an ADPCM (VOX) encoder / decoder following Dialogic's algorithm as documented at: ...

Hiya all, I'm trying to write an ADPCM (VOX) encoder / decoder following Dialogic's algorithm as documented at: http://resource.intel.com/te lecom/support/appnotes/adpcm.pdf (I've replaced the 12bit step size table with the equivalent 16bit table.) Things seem straight forward enough until I come to test it. I'm


G.726 ADPCM

Started by genesisleo in Audio Signal Processing14 years ago

Hi, I'm trying to write an ADPCM G.726 specifications codec and I met with some problems. I found the following codes available from Sun...

Hi, I'm trying to write an ADPCM G.726 specifications codec and I met with some problems. I found the following codes available from Sun Microsystems which is written for G.721. However I had a lot of diffculties understanding the codes and I would appreciate any help. ********************************************************************** /* * This source code is a product of Sun Micro


3 bit IMA ADPCM

Started by channangihally in Audio Signal Processing13 years ago

Hi, For one of our application, we want 5 time compression ie 16 bit data to 3 bit. Can any one send the 3 bit IMA ADPCM. Regards Yogesha C...

Hi, For one of our application, we want 5 time compression ie 16 bit data to 3 bit. Can any one send the 3 bit IMA ADPCM. Regards Yogesha C A.


adpcm, distortion, and dithering

Started by Harland Christofferson in Audio Signal Processing14 years ago

We're using the Intel/DVI ADPCM algorithm. It works well but it distorts the audio beyond our specifications (greater than 7% THD+N for...

We're using the Intel/DVI ADPCM algorithm. It works well but it distorts the audio beyond our specifications (greater than 7% THD+N for frequencies greater than 2KHz). I am thinking triangular dithering the signal before it is compressed may help (using 16-bit samples). When toggling the least significant bit of the sample between -1, 0,1, is this a "random" operation


ADPCM Algorithm!

Started by Pramod in Audio Signal Processing17 years ago

Hi,   I am new to this Audio DSP group!

Hi,   I am new to this Audio DSP group!