| 摘要 |
The present invention provides a data reading method, and a video transmitter and a video receiver using the same in which there is no video interruption time or a video interruption time is short during rewriting of EDID. In a video transmitter which transmits a digital video signal obtained by performing a contents protection process to a video receiver through digital interfaces, after the video transmitter reads information related to the characteristics of the video receiver and performs a default setting of a video signal format on the basis of the information by a default setting process to be executed when power is started to be supplied from the video transmitter to the video receiver, the video transmitter performs a CP process and transmits a digital video signal. During transmission of the video signal, when receiving a re-reading request for the information related to the characteristics of the video receiver transmitted from the video receiver through a bidirectional communication line, the information related to the characteristics of the video receiver is read through the bidirectional communication line or another bidirectional communication line, and the video signal generated by resetting the video signal format on the basis of the read data is transmitted to the video receiver.
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