| 摘要 |
PURPOSE:To constitute a device having superior presence, by operating a cursor operation handle and a gain adjustment knob through looking at data reproduced on a display part which displays signals from a magnetic tape on which the video signal of a sonar, an audio signal and synchronizing signals are recorded. CONSTITUTION:The video signal of a sonar, a multiples signal obtained from an audio signal from each underwater microphone through PCM, a rotation synchronizing signal, and a sweep synchronizing signal are recorded on a magnetic tape loaded on a VTR. The VTR is actuated with a signal ST from a control part CT. Those playback outputs are demodulated by a DEM on the basis of the synchronizing signals, and a video signal V, audio signals A, a rotation synchronizing signal Sr, and as weep synchronizing signal Ss are separated from one another and supplied to display parts DP1-DPn through signal control parts SC1-SCn. Each display part has a cathode-ray tube CRT, a speaker SP, a cursor operation handle, and a gain adjustment knob, which are operated respectively to send signals Sc1-Scn, thereby obtaining audio signals and images corresponding to the directions of cursors. Consequently, the training for sonar technique is achieved with superior presence. |
