Co-host: The Institute of Image Electronics Engineers of Japan, The Institute of Image Information and Television Engineers
In this report, a new type of layered (scalable) video coding especially for the use of water level monitoring is introduced. A sensor node of the system produces a bit stream functionally separated into three layers. The first layer contains the minimum components effective for detecting the water level. It is transmitted at very low bit rate for regular monitoring. The second layer contains signals for thumb-nail video browsing. The third layer contains additional data for decoding the original video signal. A video signal is decomposed into several bands with the three dimensional transform. In this report, optimum bands to be contained into the 1st layer are experimentally investigated considering both of water level detection and data size to be transmitted. As a result, bit rate for transmitting the first layer is reduced by 32.5 % at the cost of negligible 3.7 % decrease of recognition performance for one of video examples.
