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Voice_Audio_Chap_10_11_2.pdf

Voice_Audio_Chap_10_11_2

hailooloo 2011-10-10 评分 0 浏览量 0 0 0 0 暂无简介 简介 举报

简介:本文档为《Voice_Audio_Chap_10_11_2pdf》,可适用于IT/计算机领域,主题内容包含VOICEBOOKESAMPLECHAPSpageVoiceandAudioCompressionforWirelessCommunications符等。

VOICEBOOKESAMPLECHAPSpageVoiceandAudioCompressionforWirelessCommunicationsbycLHanzo,FCASomerville,JPWoodard,HTHowSchoolofElectronicsandComputerScience,UniversityofSouthampton,UKVOICEBOOKESAMPLECHAPSpageiContentsPrefaceandMotivationAcknowledgementsISpeechSignalsandWaveformCodingSpeechSignalsandCodingMotivationofSpeechCompressionBasicCharacterisationofSpeechSignalsClassificationofSpeechCodecsWaveformCodingTimedomainWaveformCodingFrequencydomainWaveformCodingVocodersHybridCodingWaveformCodingDigitisationofSpeechQuantisationCharacteristicsQuantisationNoiseandRateDistortionTheoryNonuniformQuantisationforaKnownPDF:CompandingPDFindependentQuantisationusingLogarithmicCompressionTheµLawCompanderTheAlawCompanderOptimumNonuniformQuantisationChapterSummaryPredictiveCodingForwardPredictiveCodingDPCMCodecSchematicPredictorDesigniVOICEBOOKESAMPLECHAPSpageiiiiCONTENTSProblemFormulationCovarianceCoefficientComputationPredictorCoefficientComputationAdaptiveOnewordmemoryQuantizationDPCMPerformanceBackwardAdaptivePredictionBackgroundStochasticModelProcessesThekbpsGADPCMCodecFunctionalDescriptionoftheGCodecAdaptiveQuantiserGQuantiserScaleFactorAdaptationGAdaptationSpeedControlGAdaptivePredictionandSignalReconstructionSpeechQualityEvaluationGandGADPCMCodingMotivationEmbeddedGADPCMcodingPerformanceoftheEmbeddedGADPCMCodecRateDistortioninPredictiveCodingChapterSummaryIIAnalysisbySynthesisCodingAnalysisbysynthesisPrinciplesMotivationAnalysisbysynthesisCodecStructureTheShorttermSynthesisFilterLongTermPredictionOpenloopOptimisationofLTPparametersClosedloopOptimisationofLTPparametersExcitationModelsAdaptivePostfilteringLatticebasedLinearPredictionChapterSummarySpeechSpectralQuantizationLogareaRatiosLineSpectralFrequenciesDerivationoftheLineSpectralFrequenciesComputationoftheLineSpectralFrequenciesChebyshevdescriptionofLineSpectralFrequenciesSpectralVectorQuantizationBackgroundSpeakeradaptiveVectorQuantisationofLSFsVOICEBOOKESAMPLECHAPSpageiiiCONTENTSiiiStochasticVQofLPCParametersBackgroundTheStochasticVQAlgorithmRobustVectorQuantisationSchemesforLSFsLSFVectorquantisersinStandardCodecsSpectralQuantizersforWidebandSpeechCodingIntroductiontoWidebandSpectralQuantisationStatisticalPropertiesofWidebandLSFsSpeechCodecSpecificationsWidebandLSFVectorQuantizersMemorylessVectorQuantizationPredictiveVectorQuantizationMultimodeVectorQuantizationSimulationResultsandSubjectiveEvaluationsConclusionsonWidebandSpectralQuantisationChapterSummaryRPECodingTheoreticalBackgroundThekbpsRPELTPGSMSpeechencoderPreprocessingSTPanalysisfilteringLTPanalysisfilteringRegularExcitationPulseComputationThekbpsRPELTPGSMSpeechDecoderBitsensitivityoftheGSMCodecA’Toolbox’BasedSpeechTransceiverChapterSummaryForwardAdaptiveCELPCodingBackgroundTheOriginalCELPApproachFixedCodebookSearchCELPExcitationModelsBinaryPulseExcitationTransformedBinaryPulseExcitationExcitationGenerationTBPEBitSensitivityDualrateAlgebraicCELPCodingACELPCodebookStructureDualrateACELPBitallocationDualrateACELPCodecPerformanceCELPOptimizationIntroductionCalculationoftheExcitationParametersFullCodebookSearchTheoryVOICEBOOKESAMPLECHAPSpageivivCONTENTSSequentialSearchProcedureFullSearchProcedureSubOptimalSearchProceduresQuantizationoftheCodebookGainsCalculationoftheSynthesisFilterParametersBandwidthExpansionLeastSquaresTechniquesOptimizationviaPowell’sMethodSimulatedAnnealingandtheEffectsofQuantizationCELPErrorsensitivityIntroductionImprovingtheSpectralInformationErrorSensitivityLSFOrderingPoliciesTheEffectofFEContheSpectralParametersTheEffectofInterpolationImprovingtheErrorSensitivityoftheExcitationParametersTheFixedCodebookIndexTheFixedCodebookGainAdaptiveCodebookDelayAdaptiveCodebookGainMatchingChannelCodecstotheSpeechCodecErrorResilienceConclusionsDualmodeSpeechTransceiverTheTransceiverSchemeReconfigurableModulationSourcematchedErrorProtectionLowqualitykBdModeHighqualitykBdModePacketReservationMultipleAccesskBdSystemPerformancekBdSystemSummaryMultislotPRMATransceiverBackgroundandMotivationPRMAassistedMultislotAdaptiveModulationAdaptiveGSMlikeSchemesAdaptiveDECTlikeSchemesSummaryofAdaptiveMultislotPRMAChapterSummaryStandardSpeechCodecsBackgroundTheUSDoDFSkbitssCELPCodecIntroductionLPCAnalysisandQuantizationTheAdaptiveCodebookTheFixedCodebookVOICEBOOKESAMPLECHAPSpagevCONTENTSvErrorConcealmentTechniquesDecoderPostFilteringConclusionTheISDAMPSspeechcodecTheJDCspeechcodecTheQualcommVariableRateCELPCodecIntroductionCodecSchematicandBitAllocationCodecRateSelectionLPCAnalysisandQuantizationThePitchFilterTheFixedCodebookRateFilterExcitationDecoderPostFilteringErrorProtectionandConcealmentTechniquesConclusionJapaneseHalfRateSpeechCodecIntroductionCodecSchematicandBitAllocationEncoderPreProcessingLPCAnalysisandQuantizationTheWeightingFilterExcitationVectorExcitationVectorChannelCodingDecoderPostProcessingThehalfrateGSMcodecHalfrateGSMcodecoutlineHalfrateGSMCodec’sSpectralQuantisationErrorprotectionThekbitssGCodecIntroductionCodecSchematicandBitAllocationEncoderPreProcessingLPCAnalysisandQuantizationTheWeightingFilterTheAdaptiveCodebookTheFixedAlgebraicCodebookQuantizationoftheGainsDecoderPostProcessingGErrorConcealmentTechniquesGBitsensitivityTurbocodedOFDMGSpeechTransceiverBackgroundSystemOverviewTurboChannelEncodingVOICEBOOKESAMPLECHAPSpageviviCONTENTSOFDMintheFRAMESSpeechDataSub–BurstChannelmodelTurbocodedGOFDMParametersTurbocodedGOFDMPerformanceTurbocodedGOFDMSummaryGSummaryTheReducedComplexityGAnnexACodecIntroductionThePerceptualWeightingFilterTheOpenLoopPitchSearchTheClosedLoopPitchSearchTheAlgebraicCodebookSearchTheDecoderPostProcessingConclusionsTheEnhancedFullrateGSMcodecCodecOutlineOperationoftheEFRGSMEncoderSpectralQuantisationintheEFRGSMCodecAdaptiveCodebookSearchFixedCodebookSearchTheISSpeechCodecIScodecoutlineISBitallocationschemeFixedCodebookSearchISChannelCodingTheITUGDualRateCodecIntroductionGEncodingPrincipleVectorQuantisationoftheLSPsFormantbasedWeightingFilterThekbpsHighrateGExcitationThekbpslowrateGexcitationGBitallocationGErrorSensitivityAdvancedMultirateJDCDMATransceiverMultiratecodecsandsystemsSystemOverviewTheAdaptiveMultiRateSpeechCodecAMRCodecOverviewLinearPredictionAnalysisLSFQuantizationPitchAnalysisFixedCodebookWithAlgebraicStructurePostProcessingTheAM

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