Magnetic recording and reproducing device

Claim 2

A magnetic recording device of a helical scanning system provided with rotary magnetic heads, for recording an analog video signal representative of successive frames of a motion picture, comprising: PCM still picture recording means for recording a still picture in a time division manner in a scanning period of said magnetic heads, said PCM still picture recording means including, means for converting a selected frame of said motion picture into a digital video signal, means for receiving said digital video signal for subjecting said digital video signal to a time axis expansion, and means for converting said expanded digital video signal into a PCM signal and for recording said PMC signal on said magnetic tape over a plurality of continual head scanning periods.

Claim 3

A magnetic recording device as claimed in claim l, wherein said PCM signal is recorded in a plurality of PCM regions of a plurality of motion picture tracks where said analog video signal of said motion picture is recorded.

Claim 4

A magnetic recording device as claimed in claim 2, wherein one horizontal scan of said digital video signal for said still picture frame is recorded in each said PCM region for each of said plurality of continual head scanning periods.

Claim 5

A magnetic recording device as claimed in claim l, further comprising means for recording an audio signal in a frequency multiplex mode in a motion picture track of said magnetic tape where said analog video signal of said motion picture is recorded.

Claim 6

A magnetic recording device as claimed in claim l, wherein said receiving means operates to receive said digital video signal of said selected frame within a predetermined period.

Claim 7

A magnetic recording device as claimed in claim l, wherein said PCM still picture recording means further comprises: instruction means for producing an instruction signal for a PCM still picture recording operation, said means for receiving responsive to said instruction signal to receive said digital video signal, said means for converting said expanded signal operating to convert said digital video signal thus time-axis-expanded into a PCM signal which is recorded on said magnetic tape over a plurality of continual head scanning periods.

Claim 8

A magnetic recording device as claimed in claim 6, wherein said receiving means includes means for subjecting said digital video signal thus received to time axis expansion at a predetermined rate in a steady mode.

Claim 9

A magnetic recording device as claimed in claim 7, wherein said PCM still picture recording means further comprises means for continuing, when an instruction to suspend a motion picture recording operation is issued during a still picture recording operation, the PCM still picture recording of said still picture to the completion thereof.

Claim 10

A magnetic recording device as claimed in claim l, wherein said PCM still picture recording means includes means for selectively performing the PCM still picture recording operation or PCM audio recording operation during each scanning period of said magnetic heads, said PCM still picture recording means further comprising; means for converting said expanded digital video signal into a PCM signal when said still picture recording operation is selected, and means for converting a time compressed digital audio signal into a PCM signal when said audio recording operation is selected, which is recorded during each head scanning period of time.

Claim 11

l0. A magnetic reproducing device of a helical scanning system for reproducing still pictures composed of PCM signals and motion pictures composed of analog video signals recorded in first and second regions of each of a plurality of recording tracks of a matnetic tape, by scanning said recording tracks with magnetic heads comprising: means for dividing output signals of said magnetic heads into an analog video signal read out of said first region and a PCM signal read out of said second region; means for decoding said PCM signal read out of said second region, to reproduce a digital video signal; means for storing digital video signals of said plurality of recording tracks and continually outputting said digital video signals thus stored for a predetermined period of time, to provide continuous reproducing digital video signals of a still picture; means for converting said continuous reproducing digital video signals into standard analog video signals; and means for reproducing said still pictures from said standard analog video signals.

Claim 12

l0. A magnetic reproducing device of a helical scanning system for reproducing still pictures composed of PCM signals and motion pictures composed of analog video signals recorded in first and second regions of each of a plurality of recording tracks of a matnetic tape, by scanning said recording tracks with magnetic heads comprising: means for dividing output signals of said magnetic heads into an analog video signal read out of said first region and a PCM signal read out of said second region; means for decoding said PCM signal read out of said second region, to reproduce a digital video signal; means for storing digital video signals of said plurality of recording tracks and continually outputting said digital video signals thus stored for a predetermined period of time, to provide continuous reproducing digital video signals of a still picture; means for converting said continuous reproducing digital video signals into standard analog video signals; and means for reproducing said still pictures from said standard analog video signals.