Abstract: A method for data display includes storing an identification code and receiving encoded video content for playback. The encoded video content is decoded so as to output a series of video frames while modulating a background level of the video frames in the series according to the identification code. Related systems and methods are also included.

Abstract: An electronic device with video in/out switching function using one port when connected with an external electronic apparatus includes a video switch circuit; an LCD; a processing unit, to decode and output video signals to the LCD; and an interface unit. In a video in mode, the video switch circuit connects the processing unit to the external electronic apparatus via the interface unit, thereby video signals from the external electronic apparatus are decoded and then output to the LCD. In a video out mode, the video switch circuit connects a video source to the external electronic via the interface unit, thereby video signals from the video source are output to the external electronic apparatus.

Abstract: A anti-copy programme signal is provided. Copies of the anti-copy video pulses made on a video recorder experience reduced quality and interference in playback making them unpleasant to watch. The uncopied signal can be viewed without any material effect on picture quality. The signal comprises a pulse added to each line of the signal throughout both the visible picture region and throughout the vertical blanking region, as well as a first modulated wave-form added to the vertical synchronization pulses of the signal and a second modulated wave-form added to several lines of the picture signal before the vertical blanking section. The presence of all three of these features together has been found to provide a surprising accumulative effectiveness in causing interference in the reproduction of the modified video signal during playback of the copied video signal, that is greater than the effectiveness provided by the different features taken separately.