Patent ID: 8745662

Claim:
A method of transmitting preview content, comprising: providing program guide service information by a content server to a program guide server; transmitting the program guide service information by the program guide server to a receiving apparatus when the program guide server is accessed by the receiving apparatus, wherein the program guide service information includes preview availability information which indicates whether or not the preview content exists for each of contents in the program guide service information and media format information indicating a encoding format of the preview content; and transmitting preview content corresponding to contents of the program guide service information by a preview content server to the receiving apparatus when the preview content server is accessed by the receiving apparatus, wherein the preview availability information is transmitted to the receiving apparatus before transmitting the preview content to the receiving apparatus, the media format information is transmitted to the receiving apparatus before transmitting the preview content to the receiving apparatus, and the media format information is transmitted to the receiving apparatus separately from the preview content.