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1. 发明公开

EP0209380A3 Recording and/or reproducing apparatus 失效
标题翻译：记录和/或再现装置
公开(公告)号：EP0209380A3
公开(公告)日：1988-11-23
申请号：EP86305485
申请日：1986-07-16
申请人： SONY CORPORATION
发明人： Nakamura, Shinji Patents Division , Oshima, Tomohiro Patents Division , Moriwake, Katsuakira Patents Division
IPC分类号： H04N09/82 , H04N09/83
CPC分类号： B82Y15/00 , H04N9/8355
摘要： A helical-scan video tape recorder records time-axis-compressed PCM audio signals on auxiliary recording tracks on a recording medium and has a synthesisation circuit (30) which mixes normal frequency-modulated audio signals, recorded on video tracks with the video signals, with the time-axis-compressed PCM audio signals before reproduction. The PCM audio signals require digital processing for time-axis compression before recording and subsequent expansion upon reproduction, and so are recorded and reproduced later than the frequency-modulated audio signals. Thus, when reproduced, the PCM audio component lags behind the frequency-modulated audio component, resulting in an echo effect. Adjustment of the relative amplitude levels of the two types of audio signals during synthesisation produces acoustical effects that can simulate the acoustics of a concert hall.
摘要翻译：一种螺旋扫描的磁带录像机将时间轴压缩的PCM音频信号记录在记录介质上的辅助记录磁道上，并具有一个合成电路（30），用于将记录在视频磁道上的正常频率调制音频信号与视频信号混合，与再现之前的时间轴压缩PCM音频信号。 PCM音频信号需要在记录之前进行时间轴压缩的数字处理，并在再现时进行随后的扩展，并且比频率调制音频信号晚记录和再现。因此，当再现时，PCM音频分量滞后于调频音频分量，导致回声效应。在合成期间调节两种类型的音频信号的相对幅度水平产生可以模拟音乐厅的声学效果的声学效果。

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