Method, apparatus and computer program product for testing video playback quality

An apparatus for testing a display comprising:

• a sensor for capturing information displayed by the display at a location where an identifier is shown for each frame of a sequence of frames, in which the colour of the identifier of at least each three frames of the sequence of frames differs from each other;
• and
• an analyser for analysing the captured information;
• means for determining a colour of the identifier;
• and
• means for using information on the determined colour to determine a change of a frame in the sequence of frames displayed by the display and for using the determined change of frame to further determine at least one of the following:
• a timestamp of a frame in the sequence of frames displayed by the display;
• a frame of the sequence of frames not displayed by the display;
• wherein the analyser comprises:
• means for detecting changes of illumination level of the identifier;
• means for determining a backlight illumination period on the basis of changes in the illumination level;
• and
• means for using the determined backlight illumination periods for providing timing information to obtain samples for the determining of the colour of the identifier.

A computer program product for testing a display including one or more sequences of one or more instructions which, when executed by one or more processors, cause an apparatus or a system to at least perform the following:

• capture information displayed by the display at a location of an identifier displayed with a frame of a sequence of frames, in which the colour of the identifier of at least each three frames of the sequence of frames differs from each other;
• and
• analyse the captured information;
• determine a colour of the identifier;
• and
• use information on the determined colour to determine a change of a frame in the sequence of frames displayed by the display;
• and
• using the determined change of frame to further determine at least one of the following:
• a timestamp of a frame in the sequence of frames displayed by the display;
• a frame of the sequence of frames not displayed by the display;
• wherein said at least one memory stored with code thereon, which when executed by said at least one processor, further causes the apparatus or system at least to perform:
• detect changes of illumination level of the identifier;
• determine a backlight illumination period on the basis of changes in the illumination level;
• and
• provide timing information to obtain samples for the determining of the colour of the identifier.