Voice Sensor Nodes Design And Implementation

Along with the rapid development of the communication technology, the study of Internet ofThings sets off a boom in the world.As an important part of Internet of Things,voice collectiontechnology is also facing new opportunities and challenges.In recent years,all kinds of voicecollection technology applications are gradually expanding in Internet of Things,towardingintelligent and mobile.People pay more attention to the low-cost and convenience of the voicesensor nodes,which is also easily applied to Internet of Things.Based on the study of the voice collection and coding theory,this thesis proposes the designprogram of voice sensor nodes. This thesis completes these tasks as follows:First of all,this thesisstudies ADPCM encoding theory and key technologies.Secondly,this thesis puts forward a proposalto achieve voice sensor nodes design and implementation on a singlechip,based on the study ofhardware requirement.This thesis chooses an ADPCM encoding chip MC145540 as the hardware torealize the analog voice signal collection and coding,makes use of Complex Programmable LogicDevice EPM3064A to realize the working clock of MC145540 and serial-parallel conversion anduse ATmega 128 SCM to process and transport voice signal.At last, in the development platformthis thesis uses the VHDL language and C language to complete the collection and transmission ofvoice signal,based on the analysis of the software requirement .The system has high-integration, low-cost and ease of deployment characteristics, which canbe used as a voice sensor node in Internet of Things with high practical value.