Patent ID: 8358432

Claim:
A method of controlling audio playback using a handheld display device having an image sensor, a transceiver and an opaque touch-sensitive screen, said method comprising the steps of: overlaying said screen on part of a printed substrate, said printed substrate containing printed content associated with audio; imaging an area of the printed substrate and generating image data using the image sensor; determining interaction data using said image data, said interaction data identifying a page description corresponding to the printed substrate; sending the interaction data to a computer system, thereby causing the computer system to identify the page description and retrieve display data corresponding to the printed content and audio data associated with said printed content; receiving the display data and audio data from the computer system; displaying, on said touch-sensitive screen, display information corresponding to the printed content underlying said screen together with at least one static element for controlling audio playback, such that the opaque screen has real-time virtual transparency through the opaque screen to the printed content underlying said screen from a user's perspective to provide a virtual window to the printed content underlying said screen; and controlling audio playback by interacting with said at least one static element via said touch-sensitive screen.