抄録
IPTV using Internet protocols, streaming-based mobile broadcasting such as terrestrial 1-segment broadcasting and digital audio broadcasting started recently. Download-based broadcasting services in IP networks and digital broadcasting that plays back stored content on receivers are now being considered. These broadcasting services require a function that allows only subscribers to view video content in addition to a function for playing content at a deteriorated quality to encourage viewers to purchase the content. Therefore, broadcasters require a digital video scrambling method with variable concealed levels to control the video quality of stored content. We propose a low complexity video scrambling method with variable concealed levels for H.264/AVC video coding. This method can handle H.264/AVC coding content, and its processing load for controlling the concealed level is low. We also verify that the proposed method is feasible for actual services by evaluating video quality and implementation.
