2015 年 12 巻 16 号 p. 20150529
A battery lifetime and PSNR quality-scalable video transmission is proposed. Video bitstream is intentionally encoded at lowered bitrate, and it is intermittently transmitted to exploit battery recovery effect. Battery lifetime is extended significantly with PSNR quality degradation given by user. Both battery lifetime and PSNR quality are precisely estimated and easily controlled by adjusting encoding bitrate and battery duty ratio. Battery lifetime extension is fully scalable with PSNR quality degradation, and vice versa. Measured battery lifetime was extended up to 31.4 times at the cost of 1.20∼3.89 dB PSNR degradation in H.264 video coding and ZigBee transceiver. Absolute average errors of estimated PSNR degradation and battery lifetime were less than 7.31%.
