Magnetic recording and playback apparatus capatible with conventional video signal recording format

• US 5,541,782 A
• Filed: 04/18/1995
• Issued: 07/30/1996
• Est. Priority Date: 09/28/1992
• Status: Expired due to Fees

• Current Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Original Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Inventors: Shibayama, Kenji, Kobayashi, Kaoru
• Primary Examiner(s): Sniezek, Andrew L.
• Application Number:
  US08/425,339
• Time in Patent Office: 469 Days
• Field of Search: 360/33.1, 360/22, 360/9.1, 358/335, 348/458
• US Class Current: 386/201
• CPC Class Codes: H04N 5/919 by dividing samples or signal segments, e.g. television lines, among a plurality of recording channels
• CPC Class Codes: H04N 5/937 by assembling picture element blocks in an intermediate store

Abstract

An HD image signal is recorded and reproduced by a tape head system of a conventional home VTR. An HD image signal (bb) which is of a different broadcasting system from a conventional broadcasting system and contains an information whose amount is larger than that contained in a video signal of the conventional broadcasting system is divided by four by first to eighth memories and resultant four signals are recorded on a magnetic tape through a first to fourth recording signal processing circuits and FM modulators, etc. In reproduction, the four signals are reproduced by FM demodulators and a first to fourth reproduced signal processing circuits, etc., and the HD image signal is produced by using the first to eighth memories.

Claims

1. A magnetic recording and playback apparatus comprising:

dividing means for receiving a MUSE signal and producing band-compressed first and second video signals from said MUSE signal by dividing said MUSE signal every other scanning line, so that a band-width of said MUSE signal is halved for each of said band-compressed first and second video signals, wherein each of said band-compressed first and second video signals has a horizontal signal period different from that of a conventional video signal, said dividing means further forming a sync-coupling portion in a waveform of each of said band-compressed first and second video signal so that said sync-coupling portion bridges signal segments of each of said band-compressed first and second video signals;

first and second recording signal processing means for processing said respective band-compressed first and second video signals to obtain first and second recording signals, wherein a horizontal sync signal of said conventional video signal is added to said sync-coupling portion of each of said band-compressed first and second video signals, so that each of said first and second recording signals conforms substantially to a signal format of said conventional video signal and is thus interchangeable with a conventional video signal;

first and second recording means for respectively recording said first and second recording signals from said first and second recording signal processing means simultaneously on a recording medium, said first recording means including a pair of first and second heads having different azimuth angles from each other, said second recording means including a pair of third and fourth heads having different azimuth angles from each other, said first to fourth heads respectively forming first to fourth tracks on said recording medium such that said third track is interposed between said first and second tracks and said second track is interposed between said third and fourth tracks;

first and second reproduced signal processing means for reproducing said first and second recording signals recorded by said first and second recording means from said recording medium simultaneously and processing said reproduced first and second recording signals to reproduce said band-compressed first and second video signals; and

multiplexing means for multiplexing said band compressed first and second video signals to restore said MUSE signal.