公开(公告)号：US4392160A

公开(公告)日：1983-07-05

申请号：US134324

申请日：1980-03-26

申请人： Koichi Minemura

发明人： Koichi Minemura

IPC分类号： G11B3/46 ,  G11B9/06 ,  H04N5/76 ,  H04N9/80 ,  H04N9/802 ,  H04N9/82 ,  H04N9/835 ,  H04N5/80 ,  G11B21/10

CPC分类号： H04N5/7605 ,  G11B3/46 ,  G11B9/06 ,  H04N9/80 ,  H04N9/802 ,  H04N9/8222 ,  H04N9/8355

摘要： A video disc has first and second information tracks adjacently formed thereon, and first and second FM signals with different frequency bands are recorded on the first and second information tracks, respectively. A common stylus simultaneously traces the first and second information tracks, and a signal detector circuit coupled with the stylus detects the first and second FM signals. The first and second FM signals are separated by first and second filter circuits, and applied respectively to first and second rectifying circuits, where DC voltage signals corresponding to the carrier levels of the detected first and second FM signals are produced. These DC voltage signals are compared by a voltage comparator circuit to control a tracking compensating device. Demodulator circuits to demodulate the information signals recorded on the first and second information tracks are connected to the first and second filter circuits.

摘要翻译： 视频盘具有相邻形成的第一和第二信息轨道，并且具有不同频带的第一和第二FM信号分别被记录在第一和第二信息轨道上。 共同的笔同时跟踪第一和第二信息轨道，并且与触笔耦合的信号检测器电路检测第一和第二FM信号。 第一和第二FM信号由第一和第二滤波器电路分开，分别施加到第一和第二整流电路，其中产生与检测到的第一和第二FM信号的载波电平对应的直流电压信号。 这些直流电压信号由电压比较器电路进行比较，以控制跟踪补偿装置。 用于解调记录在第一和第二信息轨道上的信息信号的解调器电路连接到第一和第二滤波器电路。

公开(公告)号：US3955211A

公开(公告)日：1976-05-04

申请号：US455811

申请日：1974-03-28

申请人： Jean Paul Peltier ,  Pierre Oprandi ,  Rene Romeas

发明人： Jean Paul Peltier ,  Pierre Oprandi ,  Rene Romeas

IPC分类号： H04N11/18 ,  H04N7/04 ,  H04N7/084 ,  H04N9/82 ,  H04N9/86

CPC分类号： H04N9/86 ,  H04N7/04 ,  H04N7/084 ,  H04N9/8222

摘要： The invention relates to the multiplexed transmission of television audio-visual signals which comprise, for example, a luminance signal successive chrominance signals and at least one audio signal. The method in accordance with the invention utilises a subcarrier wave f, frequency modulated, on the one hand, by the chrominance signals, and on the other, by a train of isochronous pulses emitted during the line blanking intervals of the luminance signal and amplitude modulated by the audio-frequency signal. The multiplex signal which will subsequently be decoded, is obtained by frequency modulating a carrier wave by a signal which is the sum of the luminance signal Y and the above mentioned frequency modulated subcarrier.

摘要翻译： 本发明涉及包括例如亮度信号连续色度信号和至少一个音频信号的电视视听信号的复用传输。 根据本发明的方法一方面利用色度信号进行频率调制的副载波f，另一方面利用在亮度信号的行消隐间隔期间发射的一系列同步脉冲和幅度调制 通过音频信号。 随后将被解码的多路复用信号通过对作为亮度信号Y和上述调频副载波的和的信号进行频率调制来获得。