Patent ID: 6950151

Claim:
A device for changing channels in a digital TV reception system with an image display unit in the form of at least one TV set or equivalent for the reception of several TV channels over an incoming communication link and display of the desired TV channel on the screen of the image display unit, wherein the communication link is connected to a memory unit in the shape of a shift register that has two-way coupling with the channel selector of the image display unit, whereby the memory unit is arranged to continuously store in the respective shift register a sequence of information, corresponding to at least one complete digital basic image and modifications between it and a next basic image, from several TV channels to which access is desired, and wherein a basic image pointer is associated with each shift unit of said memory unit, said basic image pointer continuously specifying a position of the basic image in the shift register associated with each shift unit, such that the selected TV channel after decompression is accessible for display on the screen through control by means of a control unit through the channel selector and the memory unit.