| 摘要 |
1445419 Optical sound recording HUNGAROFILM VALLALAT 18 Oct 1973 48584/73 Heading G5R Signals from two stereophonic channels are recorded as a single asymmetric optical track. The width (or one edge) is modulated by the sum of two stereo signals and the centre line (or the outer edge) by the difference. The recording is effected by means of a light valve as described in Specification 1,445,420 (see Division H4). |
