Open Source Audio Processing
I am very interested in audio processing on FPGAs, particularly for the hearing impaired. This part of the wiki will link to useful resources on this topic. Audio processing on desktop and cell phones will not be covered.
Tiliquia. View
Tiliquia is an open source audio processing solution for the EuroRack Ecosystem. Sadly the Verilog is under a strongly reciprocal license, so not good for commercial products.
Visual Hearing Aid. View
The idea is to display audio information on DVI or USB glasses, so that the world becomes more accessible to those with impaired hearing.
The first application would be sound localization. I want to use four microphones on the arms of the glasses to do beam forming. I plan to use an FPGA to do large amounts of parallel computation in real time.
Once a basic application is done, more features can be added. For those with impaired hearing at high frequencie, it should be enough to allow them to distinguish between closely related phonemes such as 'b' and 'v'.
The big problem with audio processing is echo elimination. It is called decorrelation. It is not at all clear how animals do this so well.
I am fully aware that the hearing impaired do not like to display bulky devices. The prototype will be for those who care more about sensing the world, than about their appearances. Four wires from the PDM microphones on the glasses will run into a backpack, and another wire will run from the backpack to the display glasses.
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