University of CaliforniaBerkeleyCollege of EngineeringDepartment of Electrical Engineeringand Computer SciencesProfessors : N.Morgan / B.GoldEE225D Spring,1999Speech Analysis and Synthesis OverviewLecture 3EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.1University of CaliforniaBerkeleyCollege of EngineeringDepartment of Electrical Engineeringand Computer SciencesProfessors : N.Morgan / B.GoldEE225D Spring,1999Speech Analysis and Synthesis Overview Lecture 3EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.2Figure 3.13 : Map. Showing the Communications path described in “Agamemnon”.EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.3Alexander Graham BellEE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.4Figure 3.1 : Lower Broadway in 1887.EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.5“ If I could determine what there is in the very rapidly changing complexspeech wave that corresponds to the simple motion of the lips and tongue, ifI could then analyze speech for these quantities, I would have a set of speech defining signals that could be handled as low frequency telegraph currentswith resulting advantages of secrecy, and more telephone channels in the same frequency space as well as a basic understanding of the carrier natureof speech by which the lip reader interprets speech from simple motions.” Homer Dudley, 1935EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.6Figure 31.2 : Channel Vocoder Analyzer and SynthesizerMagnitude V/UV SignalsPitch SignalsPitch Voicing DetectorDetectorBandpass MagnitudeLowpass Decimate EncodeFilter NFilter Nxn()Bandpass MagnitudeLowpass Decimate EncodeFilter 1Filter 1SignalsTRANSMITEE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.7Figure 31.2 : Channel Vocoder Analyzer and SynthesizerSwitchPulse Generator Noise GeneratorVocod erOutput+Bandpass Filter 1Bandpass Filter 2Bandpass Filter NRECEIVEV/UV SignalsPitch SignalsMagnitude SignalsEE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.8General Discrete - Time Model for Speech Production.Pitch Period Impulse TrainGlottal PulseVoiced/UnvoicedVocal TractVocal Tract ParametersRadiation Random Model Generator Noise Generator Model ModelGt()Vt() Rt() SwitchEE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.9Vocal Tract Analyzer1. Short Time Spectral Analysis2. Linear Prediction Coding3. Homomorphic Analysis4. Formant AnalysisVocal Tract Synthesizer1. Short Time Spectral Synthesis2. Linear Prediction Synthesis3. Homomorphic Synthesis4. Formant SynthesisCoded Vocal Source Analyzer 1. Fundamental Frequency Estimation2. Voiced-Unvoiced DecisionSource GeneratorOutput InputVocoder ConceptsTransmissionSpeechSpeechEE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.10Figure 3.2 : Fine Structure and Spectral Envelope of Sustained Vowels.EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.11Figure 19.10 : Comparison of (Idealized) measured Spectra for wide and narrow Filter Bank Analyzers.EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.12Figure 3.3 : Illustration of Source-Filter Separation by Cepstral Analysis.EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.13The Vocoder by Homer Dudley, Circuit Research DepartmentEE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.14EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.15Figure 3.6 : Dudley’s Waveform Display.EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.16Figure 3.7 : Continuation of Dudley’sWaveform Display.EE 225D LECTURE ON SPEECH ANALYSIS AND SYNTHESIS OVERVIEWN.MORGAN / B.GOLD LECTURE 3 3.17Figure 3.8 : Conclusions of Dudley’s Waveform Display.EE 225D