FPGA implementation of gain calculation using a polynomial expression for audio signal level dynamic compression
In this paper, we propose an FPGA design of an audio signal level compressor on the basis of an approximation algorithm using a polynomial. To implement a compression characteristic in a digital audio system, the gain calculation with fractional numbers is performed using a polynomial expression to...
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| Veröffentlicht in: | Acoustical Science and Technology 2008/11/01, Vol.29(6), pp.372-377 |
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| container_title | Acoustical Science and Technology |
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| creator | Wei, Shugang Xu, Wenhai |
| description | In this paper, we propose an FPGA design of an audio signal level compressor on the basis of an approximation algorithm using a polynomial. To implement a compression characteristic in a digital audio system, the gain calculation with fractional numbers is performed using a polynomial expression to approximate the power operation; then the compressor can be designed with a number of additions, multiplications and a division. The arithmetic circuits were implemented in FPGA technology, and the 16-bit compressor used 541 logic elements and 352 flip-flops of the hardware resource of EP20K200EFC484-2X from Altera. The proposed compressor can be applied as a functional unit in an on-chip audio system. The performance of the proposed compressor is evaluated by analysis and simulation. |
| doi_str_mv | 10.1250/ast.29.372 |
| format | Article |
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| ispartof | Acoustical Science and Technology, 2008/11/01, Vol.29(6), pp.372-377 |
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| source | J-STAGE (Japan Science & Technology Information Aggregator, Electronic) Freely Available Titles - Japanese; Open Access Titles of Japan |
| subjects | Acoustics Audio signal Compression ratio Dynamic range control Exact sciences and technology FPGA Fundamental areas of phenomenology (including applications) Gain Physics Transduction acoustical devices for the generation and reproduction of sound |
| title | FPGA implementation of gain calculation using a polynomial expression for audio signal level dynamic compression |
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