Sink device and method for controlling the same

In controlling video data transmitted from a source device, a sink device comprising:

• an interface unit configured to communicate with the source device by Wi-Fi Direct;
• a receiving unit configured to receive a voice signal;
• a display unit;
• and
• a controller configured to output the video data received from the source device through the network interface unit to the display unit, recognize a text from a screen corresponding to the video data outputted to the display unit, save the recognized text to a memory to correspond to location information on the screen corresponding to the video data, convert the voice signal received through the voice signal receiving unit into a text, and if a specific text including at least one portion of the converted text exists in the recognized text, send a message corresponding to a user input of selecting the specific text from the screen corresponding to the video data to the source device through the network interface unit.

In controlling video data transmitted from a source device, a sink device comprising:

• an interface unit configured to communicate with the source device by Wi-Fi Direct;
• a receiving unit configured to receive a voice signal;
• a memory configured to store a command transmittable to the source device through UIBC (user input back channel) and mapping data of a text corresponding to the command;
• a display unit;
• and
• a controller configured to output the video data received from the source device through the network interface unit to the display unit, convert the voice signal received through the voice signal receiving unit into a text, and if a specific text including at least one portion of the converted text exists in the text corresponding to the command stored in the memory, control the network interface unit to send a message including the command corresponding to the specific text to the source device through the UIBC.