The Onset of Parietal Alpha and Beta Band Oscillations Caused by an Initial Video Delay Video playback quality greatly affects a customers evaluation of video services1,2. Video services are commonly interrupted by an initial delay, especially in cases of network instability, dramatically degrading the user experience. However, little is known about how and to what extent the human brain reacts to an initial video delay. In this letter, we developed a series of experiments to study the influence of an initial video delay on the electroencephalogram (EEG) signals of viewers. The EEG signals of 10 volunteers were recorded and analyzed. We aimed to find common features in the EEG signals caused by initial video delays. The results show that alpha and betaband oscillations around the parietal lobe increased in almost every subject; and that these oscillations were associated with negative emotions. Additionally, we found that the average selected oscillatory activity began approximately at 450 ms post stimulus, indicating, that initial video delays longer than 450 ms would arouse negative emotions in most people.

Influence of significant target on image quality assessment via EEG The significant target in the image shows how much people pay attention to certain objects in the image when viewing the image. These significant targets will affect human perception of image quality when quality change occurs. But in recent years, most of the image quality perception research based on elsctroencephalography(EEG) were not considered of these significant targets. Therefore, this paper obtains the EEG signals of the subjects through an image rendering experiment for the presence or absence of significant targets, and compares the signal differences. The experimental results show that there is no significant effect on the image quality perception in the perceptible range. If there is a large degree of distortion, whether there is significant target has an important impact on the image quality perception.