| 摘要 |
In order to provide a monitoring system of a multimedia communication terminal which can detect abnormal reproduction of multimedia data, reliably with a simple configuration together with a sufficient consideration of the user's interface, surely discriminating the scheduled interruption of the multimedia data delivery, the monitoring system of the invention comprises a decode counter (49), a count value of said decode counter being incremented each time when video data of a picture frame is decoded from multimedia data delivered through the transmission line (23) by a video decoder (48), and control means (41) for discriminating whether the multimedia data are supplied or not by detecting beginning and ending of reproduction of the multimedia data, and detecting occurrence of an abnormal state in the multimedia communication terminal (22) by checking alteration of said count value.
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