Details_of_Speech_Coding_Standards

Details_of_Speech_Coding_Standards - Details of Speech...

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Unformatted text preview: Details of Speech Coding Standards Jerry D. Gibson ECE 241 January 27,2007 April 26, 2010 1 Speech Coding Standards January 26, 2007 April 27, 2010 2 Linear Prediction Model January 27, 2010 April 26, 2007 3 Differential Pulse Code Modulation January 27, 2010 April 26, 2007 4 Symmetric Quantizer with Adaptive Step Size January 27,2007 April 26, 2010 5 Differential Encoder with Pole-Zero Predictor JApril 26, 2007 anuary 27, 2010 6 Decoder with Pole-Zero Predictor January26, 2007 April 27, 2010 7 Embedded DPCM January 27, 2010 April 26, 2007 8 Linear Predictive Coder January 27, 2010 April 26, 2007 9 LPC Lattice Structure January 27,2007 April 26, 2010 10 Common Audio Bandwidths and Sampling Rates January 27, 2010 April 26, 2007 11 Block Diagram of G.722 January 27, 2010 April 26, 2007 12 MOS Values for G.722 JApril 26, 2007 anuary 27, 2010 13 G.722 MOS versus BER January 27, 2010 April 26, 2007 14 Codebook Search in CELP January26, 2007 April 27, 2010 15 Noise Spectral Shaping January26, 2007 April 27, 2010 16 Noise Shaping Filter N F ( z ) = P(α z ) = ∑ α ai z −1 i −i i =1 January 27, 2010 April 26, 2007 17 No Noise Spectral Shaping January 27, 2010 April 26, 2007 18 Maximum Noise Spectral Shaping January 27, 2010 April 26, 2007 19 Perceptually Best Spectral Shaping JApril 26, 2007 anuary 27, 2010 20 Perceptual Weighting N 1 − ∑ β ai z −i 1 − ∑ α ai z −i i H ( z) = W ( z) = i =1 N i i =1 JApril 26, 2007 anuary 27, 2010 21 CELP Analysis JApril 26, 2007 anuary 27, 2010 22 CELP Synthesis Model January 26, 2007 April 27, 2010 23 General Form of a Postfilter JApril 26, 2007 anuary 27, 2010 24 All Pole Postfilter Responses January 27, 2010 April 26, 2007 25 Pole-Zero Postfilter with Spectral Tilt Correction JApril 26, 2007 anuary 27, 2010 26 Voiced Speech JApril 26, 2007 anuary 27, 2010 27 Unvoiced Speech JApril 26, 2007 anuary 27, 2010 28 AMR Wideband Encoder JApril 26, 2007 anuary 27, 2010 29 AMR Wideband Decoder January 27,2007 April 26, 2010 30 Bit Allocation for the AMR-WB Modes JApril 26, 2007 anuary 27, 2010 31 Bit Allocation for a 20 msec Frame January26, 2007 April 27, 2010 32 Fixed Codebook Pulse Positions JApril 26, 2007 anuary 27, 2010 33 AMR-WB Performance for Clean Speech (French) January 26, 2007 April 27, 2010 34 AMR-WB Performance with Background Noise (English) January 27,2007 April 26, 2010 35 AMR-WB Performance with Music Inputs January 27, 2010 April 26, 2007 36 ...
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