| 摘要 |
In order to enable both reproduction of the azimuth-recorded old format and recording and reproduction of the new format of a different azimuth angle without increasing the number of heads, the number of channels of rotary transformers and the number of changeover switched, attached on a rotary drum are a head Hw1 and a head Hr1 (whose azimuth angle is - THETA ) which are located in opposite positions apart by 180 DEG , and a head Hw2 and a head Hr2 (whose azimuth angle is + beta ) which are also located in opposite positions apart by 180 DEG . Another head Hr3 (whose azimuth angle is + THETA ) is attached on the drum 3 in a position apart from the head Hr1 by 90 DEG . Recording of the narrow-track new format and RAW operation are done by the heads Hw1, Hw2, and reproduction of the new format is done by the heads Hr1, Hr2. Reproduction of a signal recorded in the old format is done by the heads Hr1 and Hr3.
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