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SPEECH COMPRESSION

SPEECH COMPRESSION. PCM. Sample Rate Nyquist Critria Bandwidth Limitation Sample Size Quantization Levels Quantization Noise / Distortion. Lossey Lossless. Source Independent Source Dependent. Compression. Voice Coding (Compression). Waveform Frequency Domain Vocoder.

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SPEECH COMPRESSION

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  1. SPEECH COMPRESSION

  2. PCM • Sample Rate • Nyquist Critria • Bandwidth Limitation • Sample Size • Quantization Levels • Quantization Noise / Distortion

  3. Lossey Lossless Source Independent Source Dependent Compression

  4. Voice Coding(Compression) • Waveform • Frequency Domain • Vocoder

  5. Waveform Coding • DSI - Digital Speech Interpolation • mLaw / A Law • Differential PCM • ADPCM – Adaptive Differential PCM • Delta Modulation • CVSD – Continuously Variable Slope Detector

  6. Frequency Domain • SBC – Sub Band Coding

  7. Vocoder • LPC – Linear Predictive Coding • CELP – Code Excited Linear Prediction • VSELP – Vector Sum Excited Linear Prediction

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