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Configuration of FPGA For Computerized Speech/Sound Processing For Bio-Computing Systems

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Author(s): V. Hanuman Kumar | P. Seetha Ramaiah

Journal: International Journal of Computer Science Issues
ISSN 1694-0784

Volume: 8;
Issue: 5;
Start page: 246;
Date: 2011;
Original page

Keywords: FPGA | DSP IP | Bio-computing system | Speech Processing algorithm | FPGA VLSI | System-on-chip | RTECS | CI | IJCSI

ABSTRACT
The development of Embedded Computer based bio-computing systems mimicking the natural functionality of human parts, is in continuous research because of advent of technology that used Very Large Scale Integration (VLSI) devices such as Field Programmable Gate Array (FPGA) to meet the challenging requirement of providing 100% functionality of the damaged human parts. The evolution of Field Programmable Gateway Array (FPGA) devices to the current state- of-art System-On-Chip (SOC) devices poses considerable problems in terms of ensuring designer productivity in developing high end Computerized Biomedical Speech Processing applications to these devices. Modern Programmable FPGA structures are equipped with specialized Digital Speech Processing embedded blocks that allow implementing digital speech processing algorithms with use of the methodology known from digital signal processor these programmable FPGA architectures give the designer the possibility to increase efficiency of the designed system. This paper presents the details of design and development of one of the bio-computing systems such as Bionic Ear or Cochlear Implant (CI) system with greater emphasis on configuration of FPGA with efficient processing algorithm. Bio-computing system incorporates Xilinx Spartan3 FPGA as the main chip for DSP IP cores, 32k words of memory, a 16-bit Analog to Digital converter fixed gain amplifier and programmable gain amplifier and transmitter which convey control codes to the receiver stimulator of the cochlear implant .The processor is battery powered and has been programmed to emulate the continuous interleaved sampling speech processor of 8 electrode implant. Here the Bio-computing system is a Real-Time Embedded Computing System (RTECS) that is required to collect the real-time speech/sound data, process the data by using speech/sound processing algorithm(s) and send the processed speech data to the electrode array inserted in the damaged inner ear (cochlea) for providing the speech recognition to the deafened person via inductive transcutaneous RF link. This process should run continuously without loss of speech/sound information.
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