Signal processing apparatus and signal processing method

A signal processing method at the signal processing apparatus comprising a tuner configured to receive a television signal, a first interface configured to be connected to an external device so as to receive information from the external device, a second interface configured to be different from the first interface and configured to be used to transmit a control signal to the external device, and a memory configured to store at least one application, the method comprising:

• determining whether an image displayed on a display is a first image based on a signal from the tuner or a second image based on a signal from the external device;
• operating for displaying a first electric program guide which is generated based on a first application stored in the memory if it is determined that the first image is being displayed;
• and
• operating for displaying a second electric program guide which is generated based on a second application stored in the external device if it is determined that the second image is being displayed.

A signal processing apparatus, comprising:

• a tuner configured to receive a television signal;
• a first interface configured to be connected to an external device so as to receive information from the external device;
• a second interface configured to be different from the first interface and configured to be used to transmit a control signal to the external device;
• a transmitter configured to transmit the control signal to the external device through the second interface;
• a memory configured to store data and application;
• a receiver configured to receive a selection operation of an input mode and an execution operation of the application as a user operation from a remote controller;
• and
• a controller that comprises (i) a first logic configured to determine whether an image displayed on a display is a first image based on a signal from the tuner or a second image based on a signal from the external device, (ii) a second logic configured to operate for displaying a first electric program guide which is generated based on a first application stored in the memory if it is determined that the first image is being displayed, and (iii) a third logic configured to operate for displaying a second electric program guide which is generated based on a second application stored in the external device if it is determined that the second image is being displayed.