计算机工程与应用2016，Vol.52Issue(13)：48-54,7.DOI:10.3778/j.issn.1002-8331.1408-0054
MDFT域参数立体声编码器设计与实现
Design and implementation of parametric stereo encoder in MDFT domain.
摘要
Abstract
Parametric stereo coding in FFT domain uses different time-frequency transforms in core encoder and stereo parameter extraction module, which leading to high computational load. A parametric stereo codec based on MDFT(Modi-fied Discrete Fourier Transform)is designed and implemented so that the same transform—MDCT(Modified Discrete Cosine Transform)be reused in down mixing channel coding and parameter extraction, thereby computational complexity can be reduced efficiently. Test results show that this codec provides comparable audio quality with the computational complexity reduction by 33% compared to the classical parametric stereo codec in FFT domain. Existing theory of para-metric stereo coding in MDFT domain is completed and verified.关键词
参数立体声编码器/修正离散傅里叶变换(MDFT)/时频变换/复杂度Key words
parametric stereo coding/Modified Discrete Fourier Transform(MDFT)/time-frequency transform/compu-tational complexity分类
信息技术与安全科学引用本文复制引用
曾敏,涂卫平,蔡旭芬..MDFT域参数立体声编码器设计与实现[J].计算机工程与应用,2016,52(13):48-54,7.基金项目
国家自然科学基金面上青年项目(No.61201340.). （No.61201340.）
