February 28, 2013
High quality transmission technology for wireless LAN based video surveillance systems
Hitachi, Ltd. and Hitachi Kokusai Electric Inc. announced the successful development of high quality wireless transmission technology with wireless LAN standards for video surveillance systems requiring high quality images. In this development, the communication method set out in the IEEE standard, IEEE 802.11e for wireless LAN systems, was applied to a video surveillance system to allow control of radio wave interference from other wireless LAN devices. Further, high quality image transmission was achieved through a communication protocol which minimizes image degradation during communication error. Hitachi and Hitachi Kokusai applied the technology developed to a prototype wireless device, and using multiple surveillance cameras to conduct verification experiments, confirmed that the frame loss rate was reduced to less than 1/100 compared to conventional systems. This technology will enable the achievement of economically efficient and highly reliable wireless video surveillance systems.
