G - Physics – 06 – F
Patent
G - Physics
06
F
354/226, 352/10.
G06F 11/00 (2006.01) G11B 20/18 (2006.01) G11B 27/032 (2006.01) G11B 27/036 (2006.01) G11B 27/038 (2006.01)
Patent
CA 1133639
ABSTRACT OF THE DISCLOSURE Digital signals are reproduced, delayed, and then mixed with edit digital signals which are supplied from a suitable source. Mixing is carried out while gradually decreasing the value of one digital signal while concurrently gradually increasing the value of the other such that one gradually is replaced by the other. The resultant mixed digital signals are recorded in data blocks formed of data words and an error check word by a recording transducer which is spaced from the reproducing transducer by an amount corresponding to the aforementioned delay. In one embodiment, the data blocks are recorded in a single track. In another embodiment, the data blocks are recorded in separate parallel trcks, with the data words in such tracks being recorded in substantial time-alignment; and the error check word in each block being associated with data words that are included in blocks that are, for example, m data blocks away. The sequences of data blocks are supplied to respective recording transducers by separate switch circuits which are operated at different times, whereby switching noise, if present, is recorded in different data blocks in the respective tracks. In an alternative embodiment, the data blocks in one track which normally are in time-alignment with corresponding data blocks in the other track are displaced therefrom, and sequences of data blocks are switched to the respective recording transducers concurrently. Because of this displacement of the data blocks, even if switching noise is recorded at the same locations in both tracks, it would not interfere with normally-related data words in the respective tracks.
344532
Gowling Lafleur Henderson Llp
Sony Corporation
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