A de-shuffling circuit of a first audio processor 21 performs the following signal processing. When an audio signal is to be reproduced from a video tape 1 in which an audio signal having 4004 samples in consecutive 5 fields is recorded on a helical track, with the number of effective ...http://www.google.fr/patents/US5784520?utm_source=gb-gplus-shareBrevet US5784520 - Audio signal reproducing apparatus
