On the Optimal Presentation Duration for Subjective Video Quality Assessment
On the Optimal Presentation Duration for Subjective Video Quality Assessment
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DOI：
10.1109/tcsvt.2015.2461971
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发表时间：
2016-11
影响因子：
8.4
通讯作者：
Felix J. Mercer Moss;Ke Wang;Fan Zhang;R. Baddeley;D. Bull
中科院分区：
文献类型：
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作者：
Felix J. Mercer Moss;Ke Wang;Fan Zhang;R. Baddeley;D. Bull
主观质量评估是现代图像和视频处理的重要组成部分，用于验证客观度量和比较编码方法。然而，用于收集数据的标准程序可能非常耗时。提高数据收集效率的一种方法是从目前大多数主观视频质量评估（VQA）实验中使用的10秒长度减少测试序列的持续时间。在这里，我们探讨的影响，减少序列长度感知准确性时，识别压缩文物。一组四个参考序列，连同五个失真水平，被用来比较观看1.5和10秒之间的视频的观众的主观评级。我们确定了一个光滑的函数，表明准确性线性增加的序列的长度从1.5到7秒。观察者观看1.5秒序列的准确性明显低于观看5、7和10秒序列的准确性。我们认为，5和10秒之间的序列产生令人满意的准确性水平，但实际的好处，获取更多的数据，我们建议使用5-S序列的未来VQA研究，使用双刺激连续质量量表的方法。
Subjective quality assessment is an essential component of modern image and video processing for both the validation of objective metrics and the comparison of coding methods. However, the standard procedures used to collect data can be prohibitively time consuming. One way of increasing the efficiency of data collection is to reduce the duration of test sequences from a 10-s length currently used in most subjective video quality assessment (VQA) experiments. Here, we explore the impact of reducing sequence length upon perceptual accuracy when identifying compression artifacts. A group of four reference sequences, together with five levels of distortion, are used to compare the subjective ratings of viewers watching videos between 1.5 and 10 s long. We identify a smooth function indicating that accuracy increases linearly as the length of the sequences increases from 1.5 to 7 s. The accuracy of observers viewing 1.5-s sequences was significantly inferior to those viewing sequences of 5, 7, and 10 s. We argue that sequences between 5 and 10 s produce satisfactory levels of accuracy but the practical benefits of acquiring more data lead us to recommend the use of 5-s sequences for future VQA studies that use the double stimulus continuous quality scale methodology.