发明名称 |
Apparatus for reproducing a multichannel record disc |
摘要 |
A multichannel record disc reproducing apparatus has a pickup cartridge for picking up signals from a multichannel record disc. A multiplexed signal was recorded on the disc by first multiplexing direct wave signals and angle-modulated wave signals which are recorded on opposite groove walls. Filters separate the picked up multiplexed signal into the direct wave signal and the angle-modulated wave signal. A demodulates circuit for demodulating the angle-modulated wave signal, thus separated. A matrix circuit separates the signals to obtain a plurality of separate channels from the direct wave signals and the demodulated signals. A circuit in a stage preceding the demodulator removes substantially all components of the higher harmonics at the carrier wave center frequency, which carrier was used for angle-modulating the original signal.
|
申请公布号 |
US4152550(A) |
申请公布日期 |
1979.05.01 |
申请号 |
US19770843856 |
申请日期 |
1977.10.20 |
申请人 |
VICTOR CO OF JAPAN LTD |
发明人 |
KASUGA, MASAO;SHIBATA, NORIO;SUZUKI, FUJIO;TAKAHASHI, NOBUAKI |
分类号 |
G11B3/00;H04S3/00;(IPC1-7):G11B3/74;H03D3/00 |
主分类号 |
G11B3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|