Study And Design Of The Speech Control System Based On DSP

In recent years,the manual means was used for the human-computer interaction, then the communication flexility was limited for computer system and machine system.In order to reform intercommunication flexility,and meet the elder's or handicapped's need , the best means of the information communication was needed.Because language is the main and basic communication mode in peoples and the digital signal processing software and hardware have been developed,up to now the technology of language operation has become maturity and may be employed in practice,then this paper give the mode about the human-computer interaction,and the speech control system was designed and used for the intelligence household electrical appliances.Firstly,after studying speech signal and according to the different purpose and desire for the signal processing,the method of the speech signal processing was advanced.Then the paper finished the digital sampling,the front-end processing and the blind signal separation,and all kinds of arithmetic were simulated.Secondly, The hardware form , the technology guideline and the function request are expatiated,and the system collectivity frame was presented,then the hardware system was designed based on DSP and the hardware circuit diagram was described.The MCU module,data collection module,the power supply module and the system hardware replacement module were discussed in details.Thirdly,the system software was designed and developed,and the total design ideas of the software were expanded.The software design and realized were discussed in details,including the digital of speech signal,the endpoint detection and the blind signal separation.Fourthly,based on the speech signal processing,the control realization of the speech was designed.The software and hardware method of control operation were presented,and resolve the communication and the connection circuit between the control part and the signal processing part.In order to validate the nicety and the validity of the arithmetic for the total control system, the softwae test was finished based on emluator and the emulational board in CCS software.The design of the software and hardware can commonly be used for the speech control system,and the household electrical appliance can freely apply this speech control system.