Real-Time Implementation of Multi-Channel Audio Crosstalk Cancellation Using Mixed Single Frequency Delay Line Filtering Algorithm
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 2
Abstract
Abstract : To reproduce high fidelity audio sound and spatial reverberation characteristics, it is desired to use the long filter coefficients in audio surround systems. To implement these long filters, the existing frequency domain based techniques such as overlap save method, multi-rate running convolution suffer from more computational complexity. Apart from computational complexity, algorithm delay is another important factor that needs to be reduced in the real time implementation of these systems. In this paper, mixed single frequency delay line filtering technique was proposed to optimize these factors in multichannel audio crosstalk cancellation and showed analytically how the computations are reduced for different multichannel cases. The ability of proposed method is that it provides less computational complexity even at the impulse response lengths of more than 100msec duration. Unlike in existing methods, algorithm delay depends only on processing frame size instead of filter length so that it provides short processing delay. The proposed technique was implemented on 32-bit floating point DSP processor and efficient design is provided to achieve processor level optimization and less implementation complexity. The computational comparison of this method with conventional methods shows that the proposed technique is very efficient for long filters
Authors and Affiliations
Chunduri SreenivasaRao
Keywords
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