CONTENT DATA PLAYBACK METHOD AND THUMBNAIL IMAGE GENERATION METHOD

摘要

In the present invention, a content data playback method includes the following steps: a step of decoding coded data (115) and generating plain text data (116); a step of separating the plain text data (116) into decoded content data (117) and playback control information (118); a step of sending the playback control information (118) to a user space; a step of storing the decoded content data (117) in a secret buffer (112); a step of obtaining the decoded content data (117) from the secret buffer (112) as data to be played back and sending the data to a decoder (114); and a step in which the decoder (114) decodes the data to be played back.