| 摘要 |
The record position information of broadcasts is used to evaluate the blank length from the tape head up to the record start position of the first broadcast. The blank length from the record end position of the broadcast up to the record start position of the next broadcast is evaluated. The blank lengths are compared up to the last broadcast sequentially to detect the longest blank section. The longest blank section is compared with the blank lengths from the record end position of the last broadcast up to the tape end, and the longer one is discriminated to be the blank section of the longest blank length. The maximum available record time which depends on the recording mode is calculated from the longest blank length, and it is displayed. The maximum available record time of the recording medium can readily be detected.
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