Method for receiving enhanced service and display apparatus thereof

Abstract

Provided are a method of receiving an enhanced service and a video display device thereof. The method includes: receiving an audio-visual (AV) content; extracting first feature information from the received AV content; receiving a database including at least one of content information, enhanced service information, and an enhanced service, which correspond to the first feature information, from a first server by transmitting the extracted first feature information to the first server; storing the database received from the first server in a memory; extracting second feature information from the received AV content; and searching and obtaining one of content information, enhanced service information, and an enhanced service, which correspond to the extracted feature information, from the database.

1 . A control method of a video display device including a display unit, the method comprising:
 receiving an uncompressed audio or video (AV) signal through a receiving unit;   extracting feature information from the uncompressed AV content;   transmitting a first query based on the feature information to the first server;   obtaining a response based on the first query; and   transmitting a second query based on the response to the second server,   wherein the response includes a polling period for the second query.   
     
     
         2 . The control method according to  claim 1 , further comprising:
 determining a request mode for the second query based on the response.   
     
     
         3 . The control method according to  claim 1 , further comprising:
 transmitting current time of the uncompressed content to the second server based on the polling period.