| 摘要 |
<p>PURPOSE:To efficiently bring a sound signal to sound recording to a sound recording medium by inserting a sound signal start signal and a sound signal end signal of a non-audible frequency, respectively, before and after the sound signal. CONSTITUTION:Sound recording is performed to a sound recording medium 1 in order of a sound signal start signal 2 consisting of a non-audible frequency determined arbitrarily, a silent signal 3, a silent signal 4, a silent signal 3, and a sound signal end signal 5 consisting of a non-audible frequency determined arbitrarily. Also, a sound signal start/end signal detecting circuit 9 is provided on a sound recording device 7, the sound signal start signal 2 is detected, a sound recording start signal is sent out to a sound recording circuit 8, and sound recording is started. Also, when the sound signal end signal 5 is detected, the sound recording circuit 8 stops sound recording by a sound recording end signal. In such a way, a sound signal in a receiving signal can be brought to sound recording efficiently to the sound recording medium.</p> |
