Contents receiving system and client

A contents receiving system comprising:

• a main receiving terminal including:
• a first receiving terminal configured to receive, from a broadcast wave or a network, a stream into which main content and subsidiary content are multiplexed;
• a separator configured to separate the received stream into the main content and the subsidiary content;
• a first output interface configured to output, as video and/or audio, the main content into which the separator has separated the received stream;
• and
• a transmission terminal configured to transmit, to the outside, the subsidiary content into which the separator has separated the received stream, and
• a plurality of subsidiary receiving terminals, each of which has unique ID information, and each of which includes:
• a second receiving terminal configured to receive the subsidiary content transmitted from the transmission terminal of the main receiving terminal;
• and
• a second output interface configured to output the received subsidiary content as video and/or audio;
• wherein:
• the content receiving system is configured such that the transmission terminal of the main receiving terminal transmits the subsidiary content corresponding to ID information of each subsidiary receiving terminal to said each subsidiary receiving terminal;
• said each subsidiary receiving terminal is capable of being viewed the different kind of subsidiary content corresponding to said each subsidiary receiving terminal respectively, while the main receiving terminal is capable of being viewed the main content;
• each subsidiary receiving terminal receives a personalized subsidiary content, and outputs the video and/or audio of the personalized subsidiary content received from the main receiving terminal;
• and
• said each subsidiary receiving terminal acquires information from a website on a basis of URL information in association with the unique ID information and an identifier associated with a specific user.