Title :
A digital audio equalizer with Optimal Error Feedback Structure
Author :
Pi, Xuesong ; Li, Hui ; Wu, Ye ; Xie, Hengjun ; Li, Huiqiu
Author_Institution :
Key Lab. of Integrated Microsyst. Sci. & Eng., Peking Univ., Beijing, China
Abstract :
A digital audio equalizer (EQ) with optimal Error Feedback (EF) structure is presented and implemented based on FPGA in this paper. The signal processed by this EQ is 24bits digital audio signal of PCM format, and the coefficients are of 27 bits length. As the feedback coefficients are adjusted with the poles of the Optimal Error Feedback Structures, the distinguishing advantage of this proposed equalizer is that it can completely eliminate the truncation noise caused by the poles when comparing with current technology.
Keywords :
equalisers; field programmable gate arrays; pulse code modulation; signal processing; FPGA; PCM; digital audio equalizer; digital audio signal; error feedback structure; signal processed; truncation noise; word length 24 bit; word length 27 bit; Acoustic noise; Equalizers; Feedback; Field programmable gate arrays; Filters; Frequency; Graphics; Signal processing; Topology; Transfer functions; Error Feedback; FPGA; equalizer; truncation noise;
Conference_Titel :
Computer Engineering and Technology (ICCET), 2010 2nd International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-6347-3
DOI :
10.1109/ICCET.2010.5485577
