A receiver for a high definition television signal in which the signal prior to transmission is sub-sampled on a block-by-block basis according to the movement has an input (39) which receives the sub-sampled signal which is applied to a shuffler (40) which shuffles the pixels of blocks in a manner which...http://www.google.co.uk/patents/US4965667?utm_source=gb-gplus-sharePatent US4965667 - Method and apparatus for processing signals conveyed in sub-sampled form by way of a transmission channel or record carrier
