Multimedia Communications: Speech Compression

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Multimedia CommunicationsSpeech Compression

• mmc3.01

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Speech Waveforms
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4-Bit PCM Coder
mmc3.03
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Error in 8-Bit PCM Coder
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Errors in 1,5,8-Bit PCM Coders
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Autocorrelation Function
mmc3.06
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First-Order Linear Prediction LPC (1)
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Differential PCM (DPCM) Coder
mmc3.08
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Backward-Adaptive 3-Bit Quantizer
mmc3.09
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Backward-Adaptive Predictor
mmc3.10
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Forward-Adaptive Predictor
mmc3.11
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Yule-Walker Equations LPC (N)
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Prediction Gain
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LPC Modeling of Speech Spectrum
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Spectrum and Pitch Prediction
mmc3.15
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Perceptual Noise Shaping
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Code Excited Linear Prediction (CELP)
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LPC Vocoder, MP-LPC and CELP
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Standard Speech Coders Performance Metrics
Coder Bit Rate Complexity
DRT DAM MOS
PCM 64 kbps
lt1 mip 95
73 4.3 ADPCM 32
kbps lt1 mip
94 68 4.2
CELP 4.8 kbps 15
mips 93 67
3.7 LPC-10 2.4 kbps
lt15 mipsgt 90
54 2.5
mmc3.19
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Quality versus Bit Rate
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Demonstrations of Telephone Speech Coders
64 kbps 32 kbps 16 kbps 8 kbps 4.8 kbps 2.4 kbps
mmc3.21