| 摘要 |
An active shutter device, such as active shutter eye-wear (101), for use in securely displaying content from a display (111) to a user (112). The secure content is encoded as a sequence of video frames interspersed within a set of video frames, at least some of the other frames within the set including obfuscating data. The device comprises a receiver (106) for receiving a synchronisation signal, at least one shutter mechanism (102, 103), and a processor (104). The processor, in response to the synchronisation signal, controls the shutter mechanism so as to synchronise the shutter mechanism with the display, particularly to synchronise the shutter mechanism with the refresh rate or the video frame display rate of the display. The processor is further configured to receive a frame sequence corresponding to the sequence of video frames used of the secure content, and to further control the shutter mechanism, in response to the received frame sequence, to allow only the video frames in the secure sequence to pass through the shutter. |
