A VHDL description of speech recognition front-end Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/ms35tb72n

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  • This thesis investigates an implementation of speech recognition front-end. It is an application specific integrated circuit (ASIC) solution. A Mel Cepstrum algorithm is implemented for the feature extraction. We present a new mixed split-radix and radix-2 Fast Fourier Transform (FFT) algorithm, which can effectively minimize the number of complex multiplications in the speech recognition front-end. A prime length discrete cosine transform (DCT) is done effectively through the use of two shorter length correlations. The algorithm results in a circular correlation structure that is suitable for a constant coefficient multiplication and shift-register realization. The multiplicative normalization algorithm is used for square root function. Radix-2 algorithm is used in the first 5 stages and radix-4 algorithm is used in the other stages to speed up the convergence. A similar normalization algorithm is present for natural logarithm.
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  • File scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-05-18T17:48:40Z (GMT) No. of bitstreams: 1 XiaoXin2002.pdf: 980382 bytes, checksum: 93102a28f2a9950f85c78b03e10d15ce (MD5)
  • description.provenance : Submitted by Kaylee Patterson (patterka@onid.orst.edu) on 2012-04-19T21:12:20Z No. of bitstreams: 1 XiaoXin2002.pdf: 980382 bytes, checksum: 93102a28f2a9950f85c78b03e10d15ce (MD5)
  • description.provenance : Made available in DSpace on 2012-05-18T17:48:40Z (GMT). No. of bitstreams: 1 XiaoXin2002.pdf: 980382 bytes, checksum: 93102a28f2a9950f85c78b03e10d15ce (MD5) Previous issue date: 2001-05-17
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-05-18T17:25:27Z (GMT) No. of bitstreams: 1 XiaoXin2002.pdf: 980382 bytes, checksum: 93102a28f2a9950f85c78b03e10d15ce (MD5)

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