A method of decoding a video signal is disclosed. The system comprises a transmitter loop structure hat is attached to, and arranged to be towed by, a helicopter. The films of the invention are suitable, owing to their increased oxygen barrier, as a packaging material for foods and other consumable goods or as a lid film for APETCPET or CPET trays. 5 millimeters greater than the dimension of the molding which it surrounds. At least one reading device is provided, for reading the markings from the material being transported on the belt.