https://community.intel.com/t5/Intel-Integrated-Performance/Problems-with-ippsLinToALaw-16s8u/m-p/791053#M2390 <P>Hello, </P><P>The ippsLinToMuLaw function assume that the input data is the raw PCM file, no wav file header. The test code is looks taking the wave hearder as well. Also, input data is 16 bits, the output is 8u. It may lost a bit loss not the data. </P><P>Thanks,<BR />Chao </P> Fri, 23 Mar 2012 06:18:53 GMT Chao_Y_Intel 2012-03-23T06:18:53Z https://community.intel.com/t5/Intel-Integrated-Performance/Problems-with-ippsLinToALaw-16s8u/m-p/791052#M2389 <DIV id="_mcePaste"></DIV><DIV>Hello, I need your help. When I convert 16bits PCM wav file to 8bit A-law using</DIV><DIV>ippsLinToMuLaw_16s8u(tmpBuffer, (Ipp8u*) inputBuffer, lCvtLen);</DIV><DIV></DIV><DIV>Main problem is that quality after compressing is significantly lower comparing to PCM16 (When I compared these signals using Adobe Audition I saw that compressed signal is more noisy.)</DIV><DIV></DIV><DIV>Can you give me some advice to resolve it?</DIV><DIV></DIV><DIV>I added cpp file from my project.</DIV><DIV></DIV><DIV>Thank you, Ron.</DIV> Wed, 14 Mar 2012 12:37:51 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Problems-with-ippsLinToALaw-16s8u/m-p/791052#M2389 tcorp1 2012-03-14T12:37:51Z https://community.intel.com/t5/Intel-Integrated-Performance/Problems-with-ippsLinToALaw-16s8u/m-p/791053#M2390 <P>Hello, </P><P>The ippsLinToMuLaw function assume that the input data is the raw PCM file, no wav file header. The test code is looks taking the wave hearder as well. Also, input data is 16 bits, the output is 8u. It may lost a bit loss not the data. </P><P>Thanks,<BR />Chao </P> Fri, 23 Mar 2012 06:18:53 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Problems-with-ippsLinToALaw-16s8u/m-p/791053#M2390 Chao_Y_Intel 2012-03-23T06:18:53Z