Abstract: A multi-screen system including an image source device for adding control information about to-be-displayed image segments to a video signal, and a plurality of display devices for detecting the control information from the video signal, extracting image segments corresponding to an ID of a display device from the video signal based on the control information, and displaying the extracted image segments.

Abstract: Provided are an apparatus and a method for controlling the recording of an image display device having a storage unit. When a recording instruction is input and an automatic image quality mode is selected, a noise level of the broadcast signal is measured and a compression rate or resolution of the broadcast signal to be recorded is automatically set depending on the measured noise level. Accordingly, it is possible to remove the inconvenience of manually setting the image quality condition of the broadcast signal whenever recording is performed, and to provide an optimized image quality. Further, it is also possible to enhance the efficiency of the storage space because the image quality condition is selectively set depending on a noise level of the broadcast signal to be recorded.

Abstract: A multi-screen system including a plurality of displaying devices for sequentially receiving request signals and separately storing corresponding IDs (IDentifications) included in the received request signals, and respectively outputting a response signal in response to a received request signal. Also included is an operating device for outputting a request signal including a corresponding ID, for outputting a new request signal if a response signal is received from a corresponding displaying device, and for transmitting control information about image segments to be respectively displayed on the displaying devices.