| Presentation | 2014-01-27 Non-linear distortion reduction by equalization of input signal in time domain Kihiro HASHINO, Naoto SAKATA, Yuki KATO, Hirofumi NAKAJIMA, Kazunori MIYOSHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose a reduction method of non-linear distortions for long input signals which are difficult in frequency domain methods of previous studies. The proposed method performs recursive process of the sub-processes: extraction non-linear distortion signal, inverse filtering with the distortion signal, and subtraction the equalized distortion signal from the input signal. To reduce the processing time of convolutions, An OverLap-Add method is used. Experimental results show that our method can equalize a non-linear distortion by 16.3dB for a music signal of about 4 minutes, that is impossible to equalize in the previous frequency domain method. We also performed non-linear distortion reductions of headphones in a simulated actual environment, which was an another issue of the previous studies. The equalize processes of headphones were executed using a dummy head microphone built-in an ear simulator whose acoustic impedance similar to the actual ear. As experimental results, our method can reduce non-linear distortions by 11.3dB. These results show that the proposed method is effective even if there are differences between equalizing and reproducing environments. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Non-linear distortion / Reduction / Recursive equalization / Sound quality equalization / Time domain |
| Paper # | EA2013-106 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2014/1/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Non-linear distortion reduction by equalization of input signal in time domain |
| Sub Title (in English) | |
| Keyword(1) | Non-linear distortion |
| Keyword(2) | Reduction |
| Keyword(3) | Recursive equalization |
| Keyword(4) | Sound quality equalization |
| Keyword(5) | Time domain |
| 1st Author's Name | Kihiro HASHINO |
| 1st Author's Affiliation | Faculty of Information, Kogakuin University() |
| 2nd Author's Name | Naoto SAKATA |
| 2nd Author's Affiliation | Faculty of Information, Kogakuin University |
| 3rd Author's Name | Yuki KATO |
| 3rd Author's Affiliation | Course of Engineering, Graduate school of Information, Kogakuin University |
| 4th Author's Name | Hirofumi NAKAJIMA |
| 4th Author's Affiliation | Course of Engineering, Graduate school of Information, Kogakuin University |
| 5th Author's Name | Kazunori MIYOSHI |
| 5th Author's Affiliation | Course of Engineering, Graduate school of Information, Kogakuin University |
| Date | 2014-01-27 |
| Paper # | EA2013-106 |
| Volume (vol) | vol.113 |
| Number (no) | 413 |
| Page | pp.pp.- |
| #Pages | 6 |
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