Thesis (MScEng (Electrical and Electronic Engineering))--Stellenbosch University, 2008. / This thesis describes the design of a high performance, floating-point, standalone embedded
system that is appropriate for speech and audio processing purposes.
The system successfully employs the Analog Devices TigerSHARC TS201 600MHz floating
point digital signal processor as a CPU, and includes 512MB RAM, a Compact Flash storage card
interface as non-volatile memory, a multi-channel audio input and output system with two
programmable microphone preamplifiers offering up to 65dB gain, a USB interface, a LCD display
and a push-button user interface.
An Altera Cyclone II FPGA is used to interface the CPU with the various peripheral
components. The FIFO buffers within the FPGA allow bulk DMA transfers of audio data for minimal
processor delays. Similar approaches are taken for communication with the USB interface, the
Compact Flash storage card and the LCD display.
A logic analyzer interface allows system debugging via the FPGA. This interface can also in
future be used to interface to additional components. The power distribution required a total of 11
different supplies to be provided with a total consumption of 16.8W. A 6 layer PCB incorporating 4
signal layers, a power plane and ground plane was designed for the final prototype.
All system components were verified to be operating correctly by means of appropriate
testing software, and the computational performance was measured by repeated calculation of a
multi-dimensional Gaussian log-probability and found to be comparable with an Intel 1.8GHz
Core2Duo processor.
The design can therefore be considered a success, and the prototype is ready for
development of suitable speech or audio processing software.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/2014 |
| Date | 03 1900 |
| Creators | Duckitt, William |
| Contributors | Niesler, T. R., Smit, W., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | Stellenbosch University |
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