| 一种基于WLP-MDCT混合音频编码算法 |
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| 引用本文： | 郭同健,王时胜,朱建勇. 一种基于WLP-MDCT混合音频编码算法[J]. 电声技术, 2004, 0(12): 54-58 |
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| 作者姓名： | 郭同健 王时胜 朱建勇 |
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| 作者单位： | 南昌大学,信息工程学院,江西,南昌,330029;南昌大学,信息工程学院,江西,南昌,330029;南昌大学,信息工程学院,江西,南昌,330029 |
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| 摘 要： | 介绍了一种卷曲线性预测(Warped Linear Prediction，WLP)与改进型离散余弦变换(Modified Discrete Cosine Transform，MDCT)混合音频编码的算法。WLP技术用来构造一对前滤波器和后滤波器，其中前滤波器用来降低MDCT编码过程中前回声的产生，后滤波器可以对量化噪声进行整形，从而进一步提高重建音频的主观听觉质量。实验结果表明该算法确实有效可行。
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| 关 键 词： | 卷曲线性预测 变换编码 音频编码 改进型离散余弦变换 |
| 文章编号： | 1002-8684(2004)12-0054-05 |
| 修稿时间： | 2004-06-28 |
A WLP-MDCT Based Hybrid Audio Coding Algorithm |
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| GUO Tong-jian,WANG Shi-sheng,ZHU Jian-yong. A WLP-MDCT Based Hybrid Audio Coding Algorithm[J]. Audio Engineering, 2004, 0(12): 54-58 |
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| Authors: | GUO Tong-jian WANG Shi-sheng ZHU Jian-yong |
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| Abstract: | This paper introduces a hybrid audio coding algorithm which is based on Warped Linear Prediction (WLP) and Modified Discrete Cosine Transform(MDCT) techniques. WLP technique is employed to construct a pre- and post-filter, where the pre-filter could reduce the pre-echo resulting from MDCT coding and the post-filter is used to shape the quantization noise spectrum so that the subjective perceptual quality of reconstructed audio signal can be improved. Experimental results show that the proposed algorithm is effective and feasible. |
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| Keywords: | Warped Linear Prediction(WLP) transform coding audio coding Modified Discrete Cosine Transform(MDCT) |
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