| 一种同时计算DFT系数和MDCT系数的新算法 |
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| 引用本文： | 郭泽华. 一种同时计算DFT系数和MDCT系数的新算法[J]. 电声技术, 2010, 34(2): 63-65,72 |
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| 作者姓名： | 郭泽华 |
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| 作者单位： | 西安电子科技大学,综合业务理论及关键技术国家重点实验室,陕西,西安,710071 |
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| 摘 要： | DVT和MDCT是音频编码算法中应用较多的2种时频分析方法。给出了一种同时计算DFT系数和MDCT系数的算法,并对原理进行了简要分析。仿真结果表明,该算法误差小,具有一定的实用性。
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| 关 键 词： | 音频编码 同时计算 DFT MDCT |
A Novel Algorithm of Simultaneous Computation of the Coefficients of DFT and MDCT |
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| GUO Ze-hua. A Novel Algorithm of Simultaneous Computation of the Coefficients of DFT and MDCT[J]. Audio Engineering, 2010, 34(2): 63-65,72 |
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| Authors: | GUO Ze-hua |
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| Affiliation: | GUO Ze-hua (State Key Laboratory of Integrated Services Networks Xidian University, Xi＇an 710071, China) |
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| Abstract: | DFT(Discrete Fourier Transform) and MDCT(Modified Discrete Cosine Transform) are two widely used methods of time-frequency analysis in audio coding. A novel algorithm which outputs both DFT and MDCT only through one computation is proposed. Then the algorithm is analyzed briefly. The results of simulation show that the proposed algorithm is useful because of its little deviation between results of time-frequency analysis and results of simulation. |
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| Keywords: | audio coding simultaneous computation DFT MDCT |
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