Patent ID: 7164448

Claim:
A method for scrolling MPEG-compressed pictures comprising the following steps: decoding by an MPEG decoder ( 5 ) and storing in an MPEG decoder memory ( 33 ) a sequence of pictures or any two pictures to be viewed chosen from a set of pictures or picture sequences to be scrolled; forming a group of pictures ( 37 ) from the sequence of pictures or from at least two pictures; transferring the group of pictures ( 37 ) to a first screen buffer ( 24 ) which is active and displaying the group of pictures ( 37 ) on a screen; selecting any another compressed picture ( 31 ) from the set of pictures or the picture sequences to be scrolled, decoding the compressed picture ( 31 ) in the MPEG decoder ( 5 ) and storing it in the MPEG decoder memory ( 33 ) as a decoded new picture ( 32 ); transferring the decoded new picture ( 32 ) from the decoder memory ( 33 ) to the first screen buffer ( 24 ), adjoining the decoded new picture ( 32 ) to the group of pictures ( 37 ) and placing the decoded new picture outside a viewing area, wherein an edge of the decoded new picture ( 32 ) perpendicular to an intended scrolling direction is adjoined to the external edge of the group of pictures ( 37 ); shifting the entire viewing area ( 21 ) until the marginal picture lying at the opposite side of the group of pictures ( 37 ) in relation to the adjoined new picture ( 32 ) is removed from the viewing area and placing a new group of pictures excluding a removed picture and including the decoded new picture ( 32 ) and at least one neighbouring picture in the viewing area; copying the new group of pictures ( 38 ) excluding the removed picture and including the decoded new picture ( 32 ) from the first screen buffer ( 24 ) which is active to a second screen buffer ( 29 ) which is inactive; and inactivating the first screen buffer ( 24 ) through shifting the viewing area from the first screen buffer ( 24 ) to the second screen buffer ( 29 ), in order to display on the screen the new group of pictures which had been copied to the second screen buffer ( 29 ).