Processing cueing or marking signal for audio recording system - converting analogue signals into pulse duration modulated signals prior to recording e.g. on magnetic tape

摘要

The input analogue cue signals are converted into pulse duration modulated signals before digitally recording along the magnet tape together with associated audio signals. The reproduced cue signals obtained from the magnetic tape are converted back into analogue form using a measuring frequency obtained from the tape transport rate. The pulse duration modulated cue signals may be compressed before recording along the tape and expanded after playback. ADVANTAGE - Reduced complexity and improved recording quality.