Method and apparatus for processing attribute information of data stream

The present invention is related to a processing method for attribute information of a data stream and an apparatus thereof, in which display attributes of the data stream such as a location, a size, and a shape of a window are altered by an image output apparatus, thereby displaying images without overlapping one another. To achieve this object, the method for attribute information of a data stream comprises the steps of determining whether the display attribute of the data stream requires an alteration or not; if the display attribute requires the alteration, generating a command frame having attribute information of display attributes to be altered; and transmitting the data stream and the command frame through a transmittance means.