| 摘要 |
A transcription system is provided which includes a plurality of signal receivers 12A,12B for positioning adjacent a writing surface 28 and for receiving a position signal transmitted from a stylus 10 when the stylus is positioned adjacent the biting surface, the signal receivers producing timing signals in response to receiving the position signal from the stylus, the transcription system using the timing signals to determine a position of the stylus adjacent the writing surface. In order to calibrate the system, the distance between the receivers needs to be determined. In one embodiment, this distance is determined from the time of flight of position signals transmitted from the stylus positioned at two calibration marks 40, a known distance apart, on a template positioned on the writing surface. The position of the template may also be determined. In another embodiment (Fig. 3C) the distance is determined from the time of flight of position signals transmitted by the stylus positioned at a respective calibration mark on each receiver.
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