| Weng Hao (翁浩),Gao Jinji,Jiang Zhinong.[J].高技术通讯(英文),2013,19(4):443~448 |
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| A method to compress vibration signals using wavelet packet transformation combined with sub-band vector quantization |
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| DOI： |
| 中文关键词: |
| 英文关键词: vibration signal compression, wavelet packet transformation (WPT), discrete cosine transformation (DCT), sub-band vector quantization (SVQ) |
| 基金项目: |
| Author Name | Affiliation | | Weng Hao (翁浩) | | | Gao Jinji | | | Jiang Zhinong | |
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| 中文摘要: |
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| 英文摘要: |
| A novel compression method for mechanical vibrating signals, binding with sub-band vector quantization (SVQ) by wavelet packet transformation (WPT) and discrete cosine transformation (DCT) is proposed. Firstly, the vibrating signal is decomposed into sub-bands by WPT. Then DCT and adaptive bit allocation are done per sub-band and SVQ is performed in each sub-band. It is noted that, after DCT, we only need to code the first components whose numbers are determined by the bits allocated to that sub-band. Through an actual signal, our algorithm is proven to improve the signal-to-noise ratio (SNR) of the reconstructed signal effectively, especially in the situation of low-rate transmission. |
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