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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Digital Audio Effect System-on-a-Chip Based on Embedded DSP Core

  • Byun, Kyung-Jin (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Kwon, Young-Su (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Park, Seong-Mo (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Eum, Nak-Woong (Convergence Components & Materials Research Laboratory, ETRI)
  • Received : 2009.05.13
  • Accepted : 2009.10.05
  • Published : 2009.12.31
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Abstract

This paper describes the implementation of a digital audio effect system-on-a-chip (SoC), which integrates an embedded digital signal processor (DSP) core, audio codec intellectual property, a number of peripheral blocks, and various audio effect algorithms. The audio effect SoC is developed using a software and hardware co-design method. In the design of the SoC, the embedded DSP and some dedicated hardware blocks are developed as a hardware design, while the audio effect algorithms are realized using a software centric method. Most of the audio effect algorithms are implemented using a C code with primitive functions that run on the embedded DSP, while the equalization effect, which requires a large amount of computation, is implemented using a dedicated hardware block with high flexibility. For the optimized implementation of audio effects, we exploit the primitive functions of the embedded DSP compiler, which is a very efficient way to reduce the code size and computation. The audio effect SoC was fabricated using a 0.18 ${\mu}m$ CMOS process and evaluated successfully on a real-time test board.

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