Open AccessDigital Audio Effect System‐on‐a‐Chip Based on Embedded DSP Core
Author(s) -
Byun Kyungjin,
Kwon YoungSu,
Park Seongmo,
Eum NakWoong
Publication year - 2009
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.09.1209.0029
Subject(s) - digital signal processing , computer science , codec , embedded system , digital audio , computer hardware , compiler , block (permutation group theory) , system on a chip , audio signal , geometry , mathematics , programming language
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 μm CMOS process and evaluated successfully on a real‐time test board.