Real-Time Transmission Of Voice Over 802.11 Wireless Networks Using Raspberry Pi

With increasing demands of Electronics products in the domain of the industrial & Consumer application, it becomes necessary to come up with new ideas of electronic products. In the field of communication, present real-time communication audio transmission uses technologies like WiMax, IEEE 802.11, 3G and Bluetooth. But audio-streaming through Bluetooth or radio waves have drawbacks of range and not secure as intruders can get streamed feed. In this paper a fully-functional embedded device has been proposed which is able to stream or transmit audio in real-time over Wi-Fi (IEEE 802.11). This system uses a small credit card sized single board called Raspberry Pi, display, webcam, Wi-Fi and headphone/speakers. This system is a standalone system and does not require any single PC to take or receive the data from camera and headphone/MIC and send to another user. Operating speed of this platform is in 700MHz and it supports live audio streaming. As it has onboard Audio codec, it is possible to connect to user by just accessing the IP address of another user. SSH (Secure SHell) is used for secure data communication, remote command-line login, remote command execution, and other secure network services between two networked nodes. Open source Linux based OS is used to keep the cost low.