发明名称 |
Helical scan type magnetic recording and reproducing apparatus |
摘要 |
A helical scan type magnetic recording and reproducing apparatus records/reproduces a video signal and a audio signal on/from tracks formed on a magnetic tape obliquely with respect to a longitudinal direction of a magnetic tape wound on a rotary drum. When a multiplexed signal containing a frequency modulated luminance signal and a low frequency converted chrominance signal and a frequency modulated audio signal which are related to an analog video signal are recorded/reproduced, the rotary drum is rotated in synchronism with a frame pulse of the analog video signal. When a digital video signal is recorded/reproduced, the rotary drum is rotated at a speed 1.25 times that when an analog video signal of the NTSC system is recorded/reproduced and at a speed 1.5 times that when an analog video signal of the PAL or SECAM system is recorded/reproduced.
|
申请公布号 |
US5642457(A) |
申请公布日期 |
1997.06.24 |
申请号 |
US19950540086 |
申请日期 |
1995.10.06 |
申请人 |
VICTOR COMPANY OF JAPAN, LTD. |
发明人 |
HIGURASHI, SEIJI |
分类号 |
G11B15/12;G11B15/18;G11B15/473;H04N5/7826;H04N9/79;H04N9/797;H04N9/802;H04N9/804;H04N9/83;(IPC1-7):H04N9/79;H04N5/91 |
主分类号 |
G11B15/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|