Patent ID: 8681271
Filing Date: 2014-03-25
Classification: H04N

Abstract:
1. A synchronization signal adjustment device comprising: a receiver configured to receive program data that includes an image signal including a plurality of frames; a sound signal; and a playback timing signal used for synchronized playback of the image signal and the sound signal, wherein each signal is delivered in a stream via a network; a clock signal generation unit configured to generate a clock signal that is independent of the playback timing signal included in the program data received by the receiver; a reception timing signal acquisition unit configured to acquire a reception timing signal indicating a receiving time of the program data by the receiver, by referring to the clock signal generated by the clock signal generation unit; an analysis unit configured to analyze a trend of time-dependent variation in a detected difference between the reception timing signal acquired by the reception timing acquisition unit and the playback timing signal included in the program data received by the receiver; and an adjustment amount generation unit configured to generate an adjustment amount of the clock signal, which is generated by the clock signal generation unit and which causes the difference between the reception timing signal and the playback timing to be constant, by referring to the trend of time-dependent variation analyzed by the analysis unit.