Research And Implementation Of Wireless Audio And Video Monitoring System In Smart Home

With the improvement of people’s living standard and the pursuit of quality of life, Smart Home has come into people’s life gradually and been developing rapidly. Audio and video monitoring, as one of the key technologies, is being payed more and more attention. On the other hand, the mature embedded technology and wireless network technology make wireless audio and video monitoring system for Smart Home possible, with low complex construction, low power consumption and high performance price ratio.The target of this paper is to design and realize the wireless audio and video monitoring system in Smart Home based on TI’s DM3730 processor platform and embedded Linux operating system. This paper focuses on how to design a small, low cost, suitable for the family life of the wireless audio and video monitoring system.This paper analyzes the current research results and the developing trend of Smart Home monitoring system, puts forward the design of wireless audio and video surveillance in Smart Home, designs the complete implementation solution. The audio and video monitoring system contains two part, capture terminal and monitoring terminal. The capture terminal uses the technologies of H.264 encoding, AAC encoding and MPEG2-TS stream, launches the software development environment based on DM3730, according to the design characteristics of the chosen hardware platform; Considering the way that the system is achieved by functional module, the system designs on multi-thread program, with buffers, describing the specific methods to achieve the related various functional modules in detail, this involving video capture based on V4L2, audio capture based on ALSA, video encoding based on H.264, audio encoding based on AAC, MPEG2-TS stream media encapsulation package and MPEG2-TS transmission based on RTP.In monitoring terminal, this system writes a functional complex monitoring software under Ubuntu system, supporting multi-channel video monitoring, audio and video recording and playback. The monitoring terminal can be also the phone、ipad and other mobile devices with WiFi, supporting the use of built-in suitable player for audio and video surveillance.After testing, the system has good stability and maintainability and some practical value.