1. I downloaded G726 encoder/decoder source code from ITU... But it require A- or mu- pcm for input, and waste much money and cpu... but why? As we know,G726 core is adpcm, and adpcm should be transparent for input signal? why g726 require A- or mu- pcm ?
2. where can I download G726 source code, only linear pcm for input ,not including G711 factor?
3.thanks.