A method for processing pictures, the method comprising: converting data for a multimedia service into a sequence of pictures by filling areas of the pictures with data for the multimedia service; and compressing, by using an encoding scheme, the sequence of pictures characterised in that converting comprises: identifying a first and a second picture having the same time information; identifying a first unused area in the first picture and a second unused area in the second picture, wherein the first unused area is an area in which actual data for the multimedia service does not exist in an entire area of the first picture and the second unused area is an area in which actual data for the multimedia service does not exist in an entire area of the second picture; performing a first conversion by filling the first unused area in the first picture with a value derived from a first used area in the first picture, wherein the first used area is an area which is filled with actual data for the multimedia service in the first picture and filling the second unused area in the second picture with data derived from a second used area in the second picture, wherein the second used area is an area which is filled with actual data for the multimedia service in the second picture exists in the entire area of the second picture; performing a second conversion by applying a replacement fill value in the first picture and the second picture to an area where the first unused area and the second unused area overlap, wherein the replacement fill value comprises an average, minimum or maximum value of a value obtained from the filled first unused area in the first picture and a value obtained from the filled second unused area in the second picture. converting data for a multimedia service into a sequence of pictures by filling areas of the pictures with data for the multimedia service; and compressing, by using an encoding scheme, the sequence of pictures characterised in that converting comprises: identifying a first and a second picture having the same time information; identifying a first unused area in the first picture and a second unused area in the second picture, wherein the first unused area is an area in which actual data for the multimedia service does not exist in an entire area of the first picture and the second unused area is an area in which actual data for the multimedia service does not exist in an entire area of the second picture; performing a first conversion by filling the first unused area in the first picture with a value derived from a first used area in the first picture, wherein the first used area is an area which is filled with actual data for the multimedia service in the first picture and filling the second unused area in the second picture with data derived from a second used area in the second picture, wherein the second used area is an area which is filled with actual data for the multimedia service in the second picture exists in the entire area of the second picture; performing a second conversion by applying a replacement fill value in the first picture and the second picture to an area where the first unused area and the second unused area overlap, wherein the replacement fill value comprises an average, minimum or maximum value of a value obtained from the filled first unused area in the first picture and a value obtained from the filled second unused area in the second picture. identifying a first and a second picture having the same time information; identifying a first unused area in the first picture and a second unused area in the second picture, wherein the first unused area is an area in which actual data for the multimedia service does not exist in an entire area of the first picture and the second unused area is an area in which actual data for the multimedia service does not exist in an entire area of the second picture; performing a first conversion by filling the first unused area in the first picture with a value derived from a first used area in the first picture, wherein the first used area is an area which is filled with actual data for the multimedia service in the first picture and filling the second unused area in the second picture with data derived from a second used area in the second picture, wherein the second used area is an area which is filled with actual data for the multimedia service in the second picture exists in the entire area of the second picture; performing a second conversion by applying a replacement fill value in the first picture and the second picture to an area where the first unused area and the second unused area overlap, wherein the replacement fill value comprises an average, minimum or maximum value of a value obtained from the filled first unused area in the first picture and a value obtained from the filled second unused area in the second picture.