Content service method, content relay method, content output method and servers, output devices and transmission/receving systems employing said methods

摘要

Provided are a system and a method for transmitting and receiving content audio-visual or multimedia at home. The content service method includes: reconstructing encrypted compressed content back into compressed contents by decrypting the encrypted compressed content according to a first scheme; encrypting the reconstructed compressed content according to a second scheme; and transmitting the encrypted compressed content via a predetermined link. Therefore, the encrypting and decrypting of contents are easily supported without an encoding process in a content server terminal at home.