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--></style></head><body lang=BG link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Dear manager,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Our company is developing embedded product, which requires echo cancellation. We found the speex license is open source under GPL, so we can use the library source code.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I am struggling to port the echo cancellation part to MICROCHIP PIC32MZ family, which is based on M14K core from MIPS. The compiler is MICROCHIP XC32 C compiler.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Do you have kind of support for this project for porting to new architectures, and then add the already supported architecture to the main project.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I presume if you can offer support to port the library to MIPS32, then we can provide the project and you can include into the main branch.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Also if not possible, can we ask for some info during the porting, currently we have the following issues:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo2'><span lang=EN-US>There are many variables of “int” type. Is this type signed 32bit integer?<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo2'><span lang=EN-US>Do you have some test data, how the echo cancellation algorithm should behave? It will be perfect if we can use it to debug the behavior of all algorithm blocks separately?<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo2'><span lang=EN-US>In my project I use the onboard ADC to take samples from the MIC every 125uS (8KHz sampling rate) and PWM to output data to the speaker every 125uS. When I collect full frame from the Microphone, I pass trough the EC algorithm. Due to I need the speaker data of the same period, do I need to get earlier speaker data (for example 20-30 samples before the frame period in order the signal to be valid).<o:p></o:p></span></li></ul><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>In general if you can help with info how to test and debug all blocks separately, we can port the entire EC algorithm and then I can send back the project, so you can include in the main branch, it will be tested and working.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thank you in advance<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Kind regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Dimitar Belev<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Soneco LTD<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Mob: +359877398772<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><a href="mailto:dimitar.belev@soneco.bg">dimitar.belev@soneco.bg</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><a href="http://www.soneco.bg">www.soneco.bg</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>