The carbon footprint of watching television, comparing digital terrestrial television with video-on-demand
The carbon footprint of watching television, comparing digital terrestrial television with video-on-demand
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看电视的碳足迹，数字地面电视与视频点播的比较
DOI：
10.1109/issst.2011.5936908
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A. Williams
中科院分区：
文献类型：
--
作者：
Jigna Chandaria;J. Hunter;A. Williams
这项研究估计了使用数字地面电视和在线提供视频点播观看广播电视的碳足迹。数字地面电视的碳足迹为0.088千克二氧化碳当量/观看小时，在线提供视频点播的碳足迹为0.030-0.086千克二氧化碳当量/观看小时。这主要基于使用阶段的能源消耗。结果对每个显示器的观众数量敏感。研究发现，观看电视对环境的最大影响是由于消费设备的功耗。这占数码地面电视的76%，而使用桌上电脑和手提电脑的自选视频点播则分别占78%和37%。具有更高功耗的更大电视屏幕的趋势可能会增加这一点。节目制作占12%至35%，发行占10%至28%。有人发现，数字地面频道的观众规模和是否使用天线放大器有很大的影响，其中分配方法似乎是最节能的。
This study estimated the carbon footprint of watching broadcast television using digital terrestrial television and online delivery of video-on-demand. The carbon footprint for digital terrestrial television was found to be 0.088 kg CO2e/viewer-hour and for online delivery of video-on-demand ranges from 0.030–0.086 kg CO2e/viewer-hour. This was based mainly on the energy consumption in the use phase. Results were sensitive to the number of viewers per display. It was found that the largest environmental impact from watching television is due to the power consumption of the consumer equipment. This amounts to 76% of the total for digital terrestrial television and 78% and 37% for video-on-demand using desktop and laptop computers respectively. The trend for larger television screens which have higher power consumption could increase this. Programme production contributes 12% to 35% and distribution contributes 10–28%. It was found that the audience size of a digital terrestrial channel and whether or not an aerial amplifier was used have a large effect on which distribution method appears to be the most energy efficient.