The assessment of Quality of Experience for stereoscopic 3D video is a challenging task, especially in 3D video compression and transmission applications. The focus of this contribution is the development of a Quality of Experience assessment framework for understanding the visual effect of asymmetric and symmetric encoding for immersive media.Asymmetric stereoscopic video coding exploits the binocular suppression of the human vision system by representing one of the two views with a lower quality. This processing may influence the quality of experience of a person viewing the 3D content. Many studies show that the quality of experience can be thought as the combination of the perceived visual quality, the perceived depth quality, the visual fatigue, and visual discomfort. In this work, we aim at: i) investigating the factors involving visual discomfort in stereoscopic video sequences with a focus on binocular rivalry; ii) exploiting the concept of Preference of Experience for the subjective quality assessment of stereoscopic video; iii) presenting the results of subjective experiments performed, by using the perceptual quality and preference of experience assessment protocols, for evaluating the impact of symmetrical, asymmetrical, and alternate coding schemes.