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http://dx.doi.org/10.7776/ASK.2012.31.7.472

Design of Low Bits Rate Transform Excitation Wide Band Speech and Audio Coder of Analysis-by-Synthesis Structure  

Jang, Sunghoon (Department of Radio Communication Eng. Chungbuk National University)
Hong, Kibong (Department of Radio Communication Eng. Chungbuk National University)
Lee, Insung (Department of Radio Communication Eng. Chungbuk National University)
Publication Information
The Journal of the Acoustical Society of Korea / v.31, no.7, 2012 , pp. 472-479 More about this Journal
Abstract
This paper is aimed to design 9.2 kbps low bits late transform excitation coder that target to voice and audio signal. To set up low bit rate, we used Band-selection in frequency domain and gain-shape quantization and AbS structure. To decrease lots of calculation from ABS structure, we used each band IDFT and synthesis. And we designed non-transfer band for performance by inserting comfort noise. We propose coder that has low bit rate and similar performance comparing with original 10.4 kbps AMR-WB+ TCX mode.
Keywords
AMR-WB+; TCX; Band-selection; AbS; mixed signal; Transform coder;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 ITU-R BS.1534, ITU-T Software Tool Library 2009 User's Manual, pp. 229-264, November 2009.
2 A. Spanias, "Speech Coding: A Tutorial Review", Proc. IEEE, vol. 82, no. 10, pp. 1541-1582, 1994.   DOI   ScienceOn
3 Kondoz A.M, "Digital Speech: Coding for Low Bit Rate Communication Systems, 2nd Ed.", John Wiley & Sons, New Jersey, 2004.
4 T. Painter, A. Spanias, "Perceptual Coding of Digital Audio", Proc. IEEE, vol. 88,no. 4, pp. 451-515 , 2000.   DOI   ScienceOn
5 J. Schnitzler, P. Vary, "Signal Processing: Trends and perspectives in wideband speech coding", Elsevier, vol. 80,no. 11, pp. 2267-2281. 2000.   DOI   ScienceOn
6 이태진, 강경옥, 김환우, "MPEG 오디오 최신 표준: USAC 기술", 방송공학회논문지, 16권, 5호, pp. 693- 704, 2011.
7 Jari Makinen, Bruno Bessette, Stefan Bruhn, Pasi Ojala, Redwan Salami, Aniswse Taleb, "AMR-WB+: A NEW AUDIO CODING STANDARD FOR 3RD GENERATION MOBILE AUDIO SERVICES", Proc. of ICASSP, pp.1109-1112, March. 2005.
8 3GPP TS 26.290, Extended Adaptive Multi-Rate- Wideband(AMR-WB+) codec: Transcoding functions, V9.0.0, 2009.
9 ISO/IEC 14496-3:2005/FPDAM9, Enhanced Low Delay AAC, Apr 2007.
10 3GPP TS 26.304, ANSI-C code for the floating point Extended AMR Wideband codec, V9.0.0, 2009.
11 ITU-R BS.1534, Method for the Subjective Assessment of Intermediate Sound Quality (MUSHRA), 2001.