A VLSI implementation method of a compressor for audio systems.
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- Wei Shugang
- Department of Computer Science, Gunma University, 1–5–1, Tenjin-cho, Kiryu, 376–8515 Japan
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- Zhang Ming
- Department of Computer Science, Gunma University, 1–5–1, Tenjin-cho, Kiryu, 376–8515 Japan
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- Shimizu Kensuke
- Department of Computer Science, Gunma University, 1–5–1, Tenjin-cho, Kiryu, 376–8515 Japan
書誌事項
- タイトル別名
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- VLSI implementation method of a compressor for audio systems
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抄録
In this paper, we present a VLSI implementation method on a dynamic range controller, audio level compressor, which is used to make sound effects as an important functional part in a digital audio system on a chip. To implement the gain calculation in a digital dynamic range controller, a power calculation with fractional numbers is required and it is difficult to be performed directly in a digital audio system. We introduce a polynomial expression to approximate the power operation, then the gain calculation is easily performed with a number of additions, multiplications and a division. Based on the gain calculation method of the gain, an efficient VLSI architecture with some arithmetic circuits is proposed. We designed the circuit of a 16-bit audio level compressor by using a hardware description language, VHDL. As a result of the compact circuit design, the 16-bit compressor has only 5,688 gates by 1 μm CMOS gate array technology. The design and simulation results show that the presented audio level compressor has high performance and can be integrated into an audio system on a chip for practical use.
収録刊行物
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- Acoustical Science and Technology
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Acoustical Science and Technology 22 (6), 407-414, 2001
一般社団法人 日本音響学会
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詳細情報 詳細情報について
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- CRID
- 1390282680065039616
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- NII論文ID
- 110003111386
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- NII書誌ID
- AA11501808
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- ISSN
- 13475177
- 03694232
- 13463969
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- NDL書誌ID
- 5963469
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- NDL-Digital
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