| Paper: | DISPS-P3.2 | ||
| Session: | High Performance DSP Architectures and Systems | ||
| Time: | Friday, May 21, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Design and Implementation of Signal Processing Systems: Hardware, Software, and Algorithm Tradeoffs and Integration | ||
| Title: | A SOFTWARE / HARDWARE CODESIGNED HANDS FREE SYSTEM ON A "RESIZABLE" BLOCK-FLOATING-POINT DSP | ||
| Authors: | Shiro Kobayashi; Asahi Kasei Corporation | ||
| Isamu Kozuka; Asahi Kasei Corporation | |||
| Wai Hung Tang; Asahi Kasei Corporation | |||
| Diemo Landmann; Asahi Kasei Corporation | |||
| Abstract: | A hands free telephone application has been implemented on a low-cost, custom-configured, block-floating-point digital signal processor (DSP). The application consists of an acoustic echo canceller and a spectral subtraction (SS) based noise suppressor. The objective of pursuing a custom configuration was the minimization of hardware cost for the given application. For this objective, implementation has been carried out though a software / hardware codesign design flow on a resizable DSP platform. The intention of exploiting block-floating-point as arithmetic was to remove the burden of time-consuming fixed-point model development, while employing an inexpensive fixed-point DSP. This paper describes an implementation of the application. Signal processing quality evaluation results are also presented for some critical computation modules in the application. | ||
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