Subjective quality has usually been studied quantitatively based on requirements of the International Telecommunication Union (ITU)  offering guidelines to study quality perception studies in controlled, laboratory environments. In the context of mobile television, these studies, which base on quantitative measurements of ITU recommendations, have focused on evaluating the impact of coding errors, low bitrates, and impact of changes in image size or framerates as well as bitrate share between audio and visual modalities (e.g. , , ). Further, there are studies into transmission errors over DVB-H channel and their impact on the perceived quality , but still these studies are rare.
With respect to stereo-coding, there are studies on stereo-coding errors in images and videos . However, user studies in the field of 3DTV have focused more on the impact of different factors on presence, the users feeling of being there. In stereo-video content presentation, the most prominent additional features that influence the perceived quality are depth information, perceived sharpness, or naturalness (i.e. the most truthful or realistic reproduction of content) . All these factors contribute to the concept of presence, the involvement of the user in the content; the feeling of being there . Nevertheless, some work has reported simulator sickness symptoms caused by the use of stereo-video presentation. This particular impact of stereo vision adversely affects enjoyment and factors creating simulator sickness are not yet known in depth .
In contrast to the recommendations of the ITU, current studies in the field of mobile TV include user characteristics, usage contexts and the user’s goal of viewing. Currently there are available results of field trials or studies conducted in several countries  as well as results of prospective focus groups and online surveys . In contrast, user studies into the field of 3DTV are still rare and Freeman’s focus group  is the only study which examines user requirements of 3DTV more broadly.
From the methodological point of view, there is a lot of work in progress to close the shortcomings of ITU recommendations. Researchers have introduces contextual quality evaluation procedure that is conducted in parallel to the controlled laboratory assessments . Additionally, evaluation of the experienced quality of critical system components targets the future acceptability of the quality of components which were developed in isolation from the end-product . A third step to understand experienced quality is to understand the interpretation of constructed quality and experienced quality factors .
Finally, there is one available study into the user experience of mobile 3D television. Following a methodological triangulation of online survey, focus groups and probe study to elicit user requirements, Jumisko-Pyykkö et al.  present a broad view on user experience of mobile TV. In all the three studies, they targeted the user experience factors of user, system and services, and contexts. Concluding their study, they present first guidelines to design user experience of mobile 3D television.
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