| 摘要 |
The present invention relates to an audience measurement apparatus (100) associable to a TV set (200) provided with a screen (4) that displays at least one piece of OSD (on screen display) information referring to the tuned channel, characterized by comprising at least one camera (1) configured to record at least one image (8) of at least a part of the areas of the screen (4) of the TV set (200), where the piece of OSD information is displayed and means to process the image (8) and detect the tuned channel. Besides the audience measurement apparatus (100), this specification also disclosed a process and system for audience measurement.
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