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首页 voice-book-sample-chaps.pdf

voice-book-sample-chaps.pdf

voice-book-sample-chaps.pdf

上传者: hailooloo 2011-10-10 评分 0 0 0 0 0 0 暂无简介 简介 举报

简介:本文档为《voice-book-sample-chapspdf》,可适用于IT/计算机领域,主题内容包含VOICEBOpageVoiceCompressionandCommunications:PrinciplesandApplicationsforF符等。

VOICEBOpageVoiceCompressionandCommunications:PrinciplesandApplicationsforFixedandWirelessChannelsbycLHanzo,FCASomerville,JPWoodardDepartmentofElectronicsandComputerScience,UniversityofSouthampton,UKVOICEBOpageiContentsPrefaceandMotivationAcknowledgementsITransmissionIssuesThePropagationEnvironmentIntroductiontoCommunicationsIssuesAWGNChannelBackgroundPracticalGaussianChannelsGaussianNoiseShannonHartleyLawTheCellularConceptRadioWavePropagationBackgroundNarrowbandfadingChannelsPropagationPathlossLawSlowFadingStatisticsFastFadingStatisticsDopplerSpectrumSimulationofNarrowbandChannelsFrequencydomainfadingsimulationTimedomainfadingsimulationBoxMullerAlgorithmofAWGNgenerationWidebandChannelsModellingofWidebandChannelsShannon’sMessageforWirelessChannelsiVOICEBOpageiiiiCONTENTSModulationandTransmissionTheWirelessCommunicationsSceneModulationIssuesChoiceofModulationQuadratureAmplitudeModulationQAMoverviewModemSchematicGrayMappingandPhasorConstellationNyquistFilteringModulationandDemodulationDatarecoveryQAMConstellationsQAMBERversusSNRPerformanceoverAWGNChannelsDecisionTheoryQAMModulationandTransmissionQAMDemodulationReferenceAssistedCoherentQAMforFadingChannelsPSAMSystemDescriptionChannelGainEstimationinPSAMPSAMperformanceDierentiallydetectedQAMAdaptiveModulationBackgroundtoAdaptiveModulationOptimisationofAdaptiveModemsAdaptiveModulationPerformanceEqualisationTechniquesOrthogonalFrequencyDivisionMultiplexingPacketReservationMultipleAccessFlexibleTransceiverArchitectureConvolutionalChannelCodingBriefChannelCodingHistoryConvolutionalEncodingStateandTrellisTransitionsTheViterbiAlgorithmErrorfreeharddecisionViterbidecodingErroneousharddecisionViterbidecodingErrorfreesoftdecisionViterbidecodingBlockbasedChannelCodingIntroductionFiniteFieldsDenitionsGaloisFieldConstructionGaloisFieldArithmeticVOICEBOpageiiiCONTENTSiiiRSandBCHCodesDenitionsRSEncodingRSEncodingExampleCircuitsforCyclicEncodersPolynomialMultiplicationShiftRegisterEncodingExampleRSDecodingFormulationoftheRSKeyEquationsPetersonGorensteinZierlerDecoderPGZDecodingExampleBerlekampMasseyalgorithmBerlekampMasseyDecodingExampleForneyAlgorithmForneyAlgorithmExampleErrorEvaluatorPolynomialComputationRSandBCHCodecPerformanceSummaryandConclusionsIISpeechSignalsandWaveformCodingSpeechSignalsandCodingMotivationofSpeechCompressionBasicCharacterisationofSpeechSignalsClassicationofSpeechCodecsWaveformCodingTimedomainWaveformCodingFrequencydomainWaveformCodingVocodersHybridCodingWaveformCodingDigitisationofSpeechQuantisationCharacteristicsQuantisationNoiseandRateDistortionTheoryNonuniformQuantisationforaKnownPDF:CompandingPDFindependentQuantisationbyLogarithmicCompressionTheLawCompanderTheAlawCompanderOptimumNonuniformQuantisationPredictiveCodingForwardPredictiveCodingDPCMCodecSchematicPredictorDesignProblemFormulationVOICEBOpageivivCONTENTSCovarianceCoecientComputationPredictorCoecientComputationAdaptiveOnewordmemoryQuantizationDPCMPerformanceBackwardAdaptivePredictionBackgroundStochasticModelProcessesThekbpsGADPCMCodecFunctionalGDescriptionAdaptiveQuantiserGQuantiserScaleFactorAdaptationGAdaptationSpeedControlGAdaptivePredictionandSignalReconstructionSpeechQualityEvaluationGandGADPCMCodingMotivationEmbeddedADPCMcodingPerformanceoftheEmbeddedGADPCMCodecRateDistortioninPredictiveCodingIIIAnalysisbySynthesisCodingAnalysisbysynthesisPrinciplesMotivationAnalysisbysynthesisCodecStructureTheShorttermSynthesisFilterLongTermPredictionOpenloopOptimisationofLTPparametersClosedloopOptimisationofLTPparametersExcitationModelsAdaptivePostlteringLatticebasedLinearPredictionSpeechSpectralQuantizationLogareaRatiosLineSpectralFrequenciesDerivationofLineSpectralFrequenciesDeterminationofLineSpectralFrequenciesChebyshevdescriptionofLineSpectralFrequenciesSpectralVectorQuantizationBackgroundSpeakeradaptiveVectorQuantisationofLSFsStochasticVQofLPCParametersBackgroundTheStochasticVQAlgorithmVOICEBOpagevCONTENTSvRobustVectorQuantisationSchemesforLSFsLSFVectorquantisersinStandardCodecsSpectralQuantizersforWidebandSpeechCodingIntroductiontoWidebandSpectralQuantisationStatisticalPropertiesofWidebandLSFsSpeechCodecSpecicationsWidebandLSFVectorQuantizersMemorylessVectorQuantizationPredictiveVectorQuantizationMultimodeVectorQuantizationSimulationResultsandSubjectiveEvaluationsConclusionsonWidebandSpectralQuantisationRPECodingTheoreticalBackgroundTheRPELTPGSMSpeechencoderPreprocessingSTPanalysislteringLTPanalysislteringRegularExcitationPulseComputationTheRPELTPSpeechDecoderBitsensitivityoftheGSMCodecA’Toolbox’BasedSpeechTransceiverForwardAdaptiveCELPCodingBackgroundTheOriginalCELPApproachFixedCodebookSearchCELPExcitationModelsBinaryPulseExcitationTransformedBinaryPulseExcitationExcitationGenerationTBPEBitSensitivityDualrateAlgebraicCELPCodingACELPCodebookStructureDualrateACELPBitallocationDualrateACELPCodecPerformanceCELPOptimizationIntroductionCalculationoftheExcitationParametersFullCodebookSearchTheorySequentialSearchProcedureFullSearchProcedureSubOptimalSearchProceduresQuantizationoftheCodebookGainsCalculationoftheSynthesisFilterParametersVOICEBOpageviviCONTENTSBandwidthExpansionLeastSquaresTechniquesOptimizationviaPowell’sMethodSimulatedAnnealingandtheEectsofQuantizationCELPErrorsensitivityIntroductionImprovingtheSpectralInformationErrorSensitivityLSFOrderingPoliciesTheEectofFEContheSpectralParametersTheEectofInterpolationImprovingtheErrorSensitivityoftheExcitationParametersTheFixedCodebookIndexTheFixedCodebookGainAdaptiveCodebookDelayAdaptiveCodebookGainMatchingChannelCodecstotheSpeechCodecErrorResilienceConclusionsDualmodeSpeechTransceiverTheTransceiverSchemeRecongurableModulationSourcematchedErrorProtectionLowqualitykBdModeHighqualitykBdModePacketReservationMultipleAccesskBdSystemPerformancekBdSystemSummaryMultislotPRMATransceiverBackgroundandMotivationPRMAassistedMultislotAdaptiveModulationAdaptiveGSMlikeSchemesAdaptiveDECTlikeSchemesSummaryofAdaptiveMultislotPRMAStandardCELPCodecsBackgroundTheUSDoDFSkbitssCELPCodecIntroductionLPCAnalysisandQuantizationTheAdaptiveCodebookTheFixedCodebookErrorConcealmentTechniquesDecoderPostFilteringConclusionTheISDAMPSspeechcodecTheJDCspeechcodecTheQualcommVariableRateCELPCodecVOICEBOpageviiCONTENTSviiIntroductionCodecSchematicandBitAllocationCodecRateSelectionLPCAnalysisandQuantizationThePitchFilterTheFixedCodebookRateFilterExcitationDecoderPostFilteringErrorProtectionandConcealmentTechniquesConclusionJapaneseHalfRateSpeechCodecIntroductionCodecSchematicandBitAllocationEncoderPreProcessingLPCAnalysisandQuantizationTheWeightingFilterExcitationVectorExcitationVectorQuantizationoftheGainsChannelCodingDecoderPostProcessingThehalfrateGSMcodecHalfrateGSMcodecoutlineHalfrateGSMCodec’sSpectralQuantisationErrorprotectionThekbitssGCodecIntroduction

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