Open Access Journal

ISSN : 2394 - 6849 (Online)

International Journal of Engineering Research in Electronics and Communication Engineering(IJERECE)

Monthly Journal for Electronics and Communication Engineering

Open Access Journal

International Journal of Engineering Research in Electronics and Communication Engineering(IJERECE)

Monthly Journal for Electronics and Communication Engineering

ISSN : 2394-6849 (Online)

Design and Implementation of Sinusoidal Model Based Codec2 Speech Decoder

Author : Sowjanya.K 1 Dr.Kalpana.A.B 2

Date of Publication :31st July 2021

Abstract: There are different optimization criteria in the design and development of speech compression algorithms in that Codec2 vocoder algorithm is one of an efficient sinusoidal coding with very high compression rate down to 450 bit/s. In this paper, to increase the performance of voice decoding process, efficient hardware architecture of Codec2 low bit-rate speech decoder is designed. The decoding processes of codec2 is based on sinusoidal model .Although the sinusoidal decoding algorithm is complicated with many arithmetic operations such as the arithmetic of complex numbers, FFT, FIR filter, division, trigonometry, exponential and logarithm functions, several techniques were explored to optimize and parallelize a data path of the proposed hardware. The proposed hardware implementation is done using verilog (hardware description language) and synthesized on Xilinx Artix-7 FPGA.

Reference :

    1. J. Srinonchat, "New Technique to Reduce Bit Rate of LPC-10 Speech Coder," IEEE Region 10 Conference, Hong Kong, November 2006, pp.1-4
    2. M. Sadek, S.E. Ramly, A. Tawfik, "A new CELP speech coder for wireless communication," 14th International Conference on Digital Signal Processing Proceedings, Greece, Vol.2, pp.997-1000
    3. C. Wu, H. Jiang, B. Li, "An Improved MELP Speech Coder," International Conference on Information Technology and Computer Science, Ukraine, August 2009, Vol.2, pp.130-133
    4. T.T. Teo, E.C. Tan, "Implementation of 2400 bps MELP vocoder on TMS320C44," Fourth International Conference on Signal Processing, China, October 1998, pp.576-579
    5. D. Rowetel, "Codec2", http://www.rowetel.com/?page_id==452
    6. D. Rowetel, "Codec2 Speech Coding Reference C Source Code," https://svn.code.sf.net/p/freetel/code/codec2/branche s
    7. D. Rowetel, "Techniques for Harmonic Sinusoidal Coding," Ph.D. Thesis, 1997
    8. https://www.tapr.org/pdf/DCC2011- Codec2- VK5DGR.pdf 
    9. W.C. Chu, "Speech Coding Algorithms Foundation and Evolution of Standardized Coders," WileyInterscience, 2003
    10. https://www.xilinx.com/support/documentation/ip_documentation/xfft/v9_0/pg109-xfft.pdf
    11. https://www.xilinx.com/support/documentation/ip_documentation/accum/v12_0/pg119-c accum.pdf
    12. https://www.xilinx.com/support/documentation/ip_documentation/mult_gen/v12_0/pg1
    13. An Efficient Hardware Architecture of Codec2 Low Bit-rate Speech Decoder | IEEE Conference Publication | IEEE Xplore

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