This test contains a training session followed by two test sessions. Each session can be repeated on different smartphones. The second test session is optional, as it may not ne supported on your device. Each session contains 6 trials. In each trial you will see multiple representations of the same scene (aka. content), designated by "A,B,C..." and a Reference "REF". The Reference represents the best quality available in this test. If you notice any degradation, you can downgrad you vote for "REF". Every clip needs to be viewed completely until it can be voted. You are free to choose the order of playback. Please use your touchscreen to rate to quality of each clip by tapping on the slider between 0 to 100, which best represents your perception.
After having rated all clips in a trial, select "SAVE" to send your votes including an anonymous User-ID including the User-Agent of your browser to IRT for later statistical analysis. You may want to interrupt the evaluation after finishing any trial to carry on later. In this case please write down the last trial- and session-number which you completed recently. The test ends, when you at least finished all trials of session 1.