A video signal encoder 1 subjects an video signal 100 of high sampling rate to hierarchical encoding. An enhancement layer bitstream 105 is then recorded on a removable recording medium 51, while a base layer bitstream 102 in a storage 40. Prior to the base layer bitstream 102 being transmitted, the...http://www.google.com.au/patents/US20020051581?utm_source=gb-gplus-sharePatent US20020051581 - Video signal encoder and video signal decoder
