Data transmission system

A data transmission system comprising:

• a server device comprising a title data obtaining section which obtains title data from content providing section in which digital data containing AV data and title data corresponding to the AV data is stored;
• and
• a client device comprising:
• a title display controlling section which displays on outputting section the title data obtained by the title data obtaining section;
• a title data storing section which stores title data;
• and
• a title data managing section which stores a plurality of title data obtained from a plurality of content providing sections in the title data storing section for each of the content providing section,
• wherein the server device and the client device communicate with each other through a transmission path, and
• the title data managing section, based on predetermined input operation information, allows the title display controlling section to display the plurality of titles stored in the title data storing section on the outputting section.

A video signal processor comprising:

• title display controlling section which displays, on outputting section, title data obtained from a plurality of content providing sections in which digital data containing AV data and title data corresponding to the AV data is stored;
• title data storing section which stores the title data;
• and
• title data managing section which stores a plurality of title data obtained from the plurality of content providing section in the title data storing section for each of the content providing section,
• wherein the title data managing section, based on received predetermined input operation information, allows the title display controlling section to display the plurality of titles stored in the title data storing section on the outputting section.