使用PIC单片机自适应差分脉冲编码调制
Inthepast,addingspeechrecordingandplayback
capabilitytoaproductmeantusingadigitalsignal
processororaspecializedaudiochip.Now,usinga
simplifiedAdaptiveDifferentialPulseCodeModulation
(ADPCM)algorithm,theseaudiocapabilitiescanbe
addedtoanyPIC
Æ
microcontrollerorDSCdigitalsignal
controller.ThisapplicationnotewillcovertheADPCM
compressionanddecompressionalgorithms,andan
applicationusingaPIC18F67J10microcontroller.AN643AdaptiveDifferentialPulseCodeModulationUsingPICMicrocontrollers3.00.TheITU(formerlyCCITT)G.721ADPCMalgo-Author:RodgerRicheyMicrochipTechnologyInc.rithmiswellknownandhasbeenimplementedonmanydigitalsignalprocessors,suchastheTMS320DSPfamilyofdevicesfromTexasInstrumentsandINTRODUCTIONtheADSP-2100familyofdevicesfromAnalogDevices.
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