Patent ID: 9049492
Filing Date: 2015-06-02
Classification: H04H,H04N

Abstract:
1. A portable terminal that saves video data encrypted by a method of superimposing a result of encoding a previous video data clear text block upon a following clear text block by a bit operation, a result of which is encrypted, the portable terminal comprising: a video data repair section that repairs video data which comprises poor video and is subject to repair, by replacing the video data with a portion of video data acquired from an external source, wherein the video data repair section comprises: a repair section that saves, without deleting, a last part of the video data to be repaired at the time of repairing the video data by replacing the extracted video data to be repaired with video data for repair; and a re-encrypting section that re-encrypts only the video data for repair, wherein the last part of the video data to be repaired is data used for decrypting subsequent video data continuing after the video data to be repaired at the time of playback, and the last part of the video data to be repaired itself is ignored while the playback is performed.