期刊文献+
任意字段
题名或关键词
题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息

基于N/8点FFT核的MDCT/IMDCT快速实现方案 被引量：3

An efficient realization of MDCT/IMDCT based on N/8-point FFT kernel
下载PDF
导出
摘要 数字音频编解码系统采用MDCT/IMDCT实现时间-频率域的互换,以消除音频分帧引起的时间域混叠效应.本文提出一种新的MDCT/IMDCT快速实现方案,基于N/8点FFT变换核,采用奇偶双路并行和蝶型单元技术,与现有快速算法相比,运算速度和吞吐能力均提高一倍,并且该方案既可以实现MDCT正变换,也可以实现相应的反变换.为了验证方案的正确性,在Altera FPGA开发板上完成了N=256点MDCT的实验.结果表明,该实现方案在运算速度和数据吞吐率等方面取得很大的改进. MDCT/IMDCT performs the conversion between the time-domain signal and the frequency representation in the high quality audio codec system, which is based on the concept of time-domain aliasing cancellation. Using the N/8-point FFT kernel, a new MDCT/IMDCT general structure is presented in this paper. The computation rate and the data throughput per transformation of the system are twice as much as the latest algorithm, utilizing both the paralleling procedure and the butterfly unit. In addition, the analyzed results of FPGA implementation on Altera Stratix Device show the proposed structure provides a superior performance in terms of computation speed and data throughput.
作者 李琳 郭立 白雪飞 黄昊
机构地区 中国科学技术大学电子科学与技术系电路与系统实验室
出处 《中国科学院研究生院学报》 CAS CSCD 2008年第6期810-815,共6页 Journal of the Graduate School of the Chinese Academy of Sciences
基金 国家自然科学基金(60606005)资助
关键词 MDCT IMDCT FFT 双路并行 蝶型单元 FPGA MDCT, IMDCT, FFT, paralleling procedure, butterfly unit, FPGA
分类号 TN911 [电子电信—通信与信息系统]
  • 相关文献

参考文献1

二级参考文献9

  • 1Generic coding of moving pictures and associated audio (part 7:advanced audio coding (AAC)). ISO/IEC 13818-7[S].
  • 2Chiang H C, Liu J C. Regressive implementations for the forward and inverse MDCT in MPEG audio coding[J].Signal Processing Letters, 1996, 3(4) : 116-118.
  • 3Nikolajevic V, Fettweis Go and inverse MDCT using Computation of forward Clenshaw's recurrence formula, signal processing[J]. IEEE Transactions on Signal Processing, 2003, 51(5):1439-1444.
  • 4Chen C H, Liu B D, Yang J F. Recursive architectures for realizing modified discrete cosine transform and its inverse [J].IEEE Transactions on Circuits and Systems-Ⅱ: Analog and Digital Signal Processing, 2003, 50(1): 38-45.
  • 5Li J. Reversible FFT and MDCT via matrix lifting[C]//Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing. Inspec, 2004, 4: 173-176.
  • 6Kidambi S S. Recursive implementation of the DCT-IV and DST-IV[C]// IEEE Symposium on Advances in Digital Filtering and Signal Processing. Victoria, Canada: IEEE Press, 1998: 106-110.
  • 7Lee S W. Improved algorithm for efficient computation of the forward and backward MDCT in MPEG audio coder[J].IEEE Transactions on Circuits and Systems Ⅱ: Analog and Digital Signal Processing. 2001, 48(10):990-994.
  • 8Krishnan T, Oraintara S. Fast and lossless implementation of the forward and inverse MDCT computation in MPEG audio coding [C]// IEEE International Symposium on Circuits and Systems. Scottsdale: IEEE Press, 2002,2:181-184.
  • 9Britanak V, Rao K R. An efficient implementation of the forward and inverse MDCT in MPEG audio coding [J]. IEEE Signal Processing Letters, 2001, 8(2):48-51.

共引文献2

同被引文献13

  • 1张瑾,徐元欣,张季,王匡.高清电视音频解码的定点DSP实现[J].江南大学学报（自然科学版）,2005,4(3):231-234. 被引量：5
  • 2PRINCEN J P, BRADLEY A B. Analysis/synthesis filter bank design based on time domain aliasing cancellation [J]. IEEE Trans AcousticsSpeech SignalProcess, 1986, 34(5): 1153-1161.
  • 3BRITANAK V, RAO K R. An efficient implementation of the forward and inverse MDCT in MPEG audio coding [J]. IEEE Signal Process Lett, 2001,8 (2):48-51.
  • 4LEE S W. Improved algorithm for efficient computation of the forward and backward MDCT in MPEG audio coder [J]. IEEE Trans Circuits Syst II, 2001,48( 10): 990-994.
  • 5BRITANAK V, RAO K R. A new fast algorithm for the unified forward and inverse MDCT/MDST computation[J]. Signal Processing, 2002,82( 3 ): 433- 459.
  • 6HEIDEMAN M T. Computation of an odd -length DCT from a real-valued DFT of the same length [J]. IEEE Transactions on Signal Processing, 1992,40( 1 ):54-61.
  • 7CHENG M H, HSU Y H. Fast IMDCT and MDCT algorithms a matrix approach[J]. IEEE Transactions on Signal Processing, 2003,51( 1 ):221-229.
  • 8KOK C W. Fast algorithm for computing discrete cosine transform [J]. IEEE Transactions on Signal Processing, 1997,45 ( 3 ):757 -760.
  • 9张轩磊,窦维蓓,董明.面向SoC的数字音频解码系统设计方法[J].电声技术,2008,32(8):72-76. 被引量：8
  • 10胡瑞明,耿相铭.基于ARM946E处理器的MP3解码优化设计[J].现代电子技术,2009,32(6):172-174. 被引量：4

引证文献3

二级引证文献4

中国科学院研究生院学报
2008年 第6期

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部