| 摘要 |
A switching control circuit monitors the results of decision by illegality decision circuit for the presence of an illegally copied content or contents. In the absence of an illegally copied content, the switching control circuit turns on switches to allow the transmission of contents on all of transmission lines to a multiplexing circuit. When an illegally copied content is detected by at least one of the illegality decision circuits, all the switches are turned off, interrupting the transmission of contents on all the lines to the multiplexing circuit. Thus, an illegally copied content is detected and interrupted prior to multiplexing, preventing a multiplexed signal from containing any illegally copied content.
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