Signal processing apparatus and control method thereof

The present invention relates to a signal processing system including the same and a control method and a signal processing device. Signal processing device is an Internet address corresponding to a plurality of channels and stores the channel memory; Connected to the Internet network available network connection portions and; When the user selects a predetermined channel so as to connect to the Internet address corresponding to the selected channel receives the content provided by the Internet address and a controller for controlling said network connection. In this way, by assigning an Internet address for providing a content to a channel, it may be facilitated by the channel change to watch the content.