JPH0678257A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To double the recording time by recording and reproducing 2-channels of video signals and audio signals with a simple configuration. CONSTITUTION:An operation command circuit 11 outputs a command to each section to decide its operation. A recording medium carrier means 2 carries a recording medium 1, a 1st (2nd) recording and reproducing means 305 (306) records an external audio signal onto a 1st (2nd) audio track, and a video recording means 41 records only odd (even) number of fields of an external video signal onto an odd number tracks (even number tracks) of video tracks in the recording state. The recording medium carrier means 2 carries the recording medium 1 in the reproducing state, the 1st and 2nd audio recording and reproducing means 305, 306 reproduce and output the audio signals from the respective audio tracks, a video reproducing means 42 alternately reproduces the odd number and even number tracks of the video track to generate two video signals separately to each other and output them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus used for a video tape recorder (hereinafter abbreviated as VTR), a video disc player or the like.

[0002]

2. Description of the Related Art Recently, in a recording / reproducing apparatus (for example, a VTR), it has been required to lengthen the recording time due to the increase of television broadcasting channels and the broadcasting of long-time programs. However, in order to record for a long time with a conventional VTR, multiple VTs are required.
R and multiple tapes were needed, tapes had to be replaced, and answering machine recording was not possible, which made it inconvenient.

On the other hand, as a countermeasure against this, an apparatus for simultaneously recording and reproducing two channels (Japanese Patent Laid-Open No. 63-204981) and an apparatus for increasing the number of recording channels by performing time axis compression processing (Japanese Patent Laid-Open No. 64-71279). (Japanese Patent Laid-Open No. 63-280583), and a device for performing intermittent recording in frame units after setting the tape speed slower than before.

As a conventional technique, a recording / reproducing apparatus that simultaneously records and reproduces two channels will be described as an example with reference to the drawings.

FIG. 16 is a block diagram of a conventional recording / reproducing apparatus. In FIG. 16, reference numeral 101 denotes a determination result of whether the video signal B is an odd field or an even field of the video signal B input from the outside and a sync separation circuit that outputs the video signal B, and 102 is an external signal based on the determination result of the sync separation circuit 101. A switch for switching between the video signal A and the video signal B which are synchronously input, and 103, in response to recording or reproduction, sequentially record the video signals output by the switch 102 on a magnetic tape or the video signals recorded on the magnetic tape. Playing VT
R and 104 are field discrimination circuits for outputting a discrimination result of whether the reproduced video signal of the VTR 103 is an odd field or an even field and the reproduced video signal of the VTR 103, 105 and 1.
Reference numeral 06 denotes a switch for transmitting or blocking the output video signal of the field discrimination circuit 104, 107 denotes an A / D conversion circuit for converting the output video signal of the switch 106 into a digital value,
Reference numeral 108 denotes a field memory for sequentially storing and reproducing the digital value of one field section of the A / D conversion circuit 107,
109 is a D / A conversion circuit for converting the digital value reproduced by the field memory 108 into an analog signal, 200 is a switch for switching the output of the switch 105 and the output of the D / A conversion circuit 109 to output a selected video signal, and 300 is The switching control circuit changes the connection state of the switches 105, 106 and 200 based on the discrimination result of the field discrimination circuit 104 and a selection signal from the outside.

The operation of the conventional recording / reproducing apparatus configured as described above will be described below. First, the operation during recording will be described. The video signal A and the video signal B, which are synchronously input from the outside, are switched for each field based on the field discrimination result of the sync separation circuit 101, and the switch 102 is switched.
Will be output. The VTR 103 sequentially records one video signal in which the video signal A and the video signal B are switched for each field on the magnetic tape.

Next, the operation during reproduction will be described. VTR1
When 03 sequentially reproduces the recording signal from the magnetic tape, one reproduced video signal in which the video signal A and the video signal B are switched for each field is obtained. The switching control circuit 300 closes the switches 105 and 106 and connects the switch 200 to the switch 105 based on a selection signal from the outside only during either the odd field or the even field of the reproduced video signal. Also, the reproduced video signal for one field period when the switch 106 is closed is converted into a digital value by the A / D conversion circuit 107 and the field memory 1
It is stored in 08. The digital value stored in the field memory 108 is output by the switch 200 to the D / A conversion circuit 10.
Simultaneously with the connection to the signal line 9, the analog signal is converted into the analog signal in the order in which the signal is stored and becomes a video signal for one field period. That is, the switch 200 has the switch 105 for each field.
And the video signal output from the D / A conversion circuit 109 are alternately output. Therefore, during playback, VT
It is possible to select a video signal of a field determined by the selection signal from the reproduced video signal of R104 and output the video signal of one field twice in succession to separate and select the reproduced video signal.

[0008]

However, in the above-mentioned apparatus for simultaneously recording a plurality of channels, a phase adjusting means using an image memory or the like is required for synchronously inputting an external video signal, It has a problem that it is not suitable for long-time recording of one program. Further, in the device for time-axis compression of the above video signal, expensive image compression processing is required, and in the device for intermittent recording, high-performance tape low-speed transfer means is required, and audio recording is difficult, There is a problem that compatibility with the conventional VTR is likely to be impaired.

In view of the above problems, a first object of the present invention is to maintain compatibility with a conventional recording / reproducing apparatus and use an image memory or a time axis compression process at a conventional recording medium transfer speed. It is for recording and reproducing each of the two channels of the video signal and the audio signal.

A second object of the present invention is to maintain compatibility with a conventional recording / reproducing apparatus and to transfer a video signal and an audio signal at a conventional recording medium transfer speed without using an image memory or a time base compression process. Each of the two channels of the signal is recorded and reproduced on one track.

A third object of the present invention is to maintain compatibility with a conventional recording / reproducing apparatus and to transfer a video signal and an audio signal at a conventional recording medium transfer speed without using a time axis compression process. Two channels are recorded and reproduced in the same recording area of the recording medium.

A fourth object of the present invention is to record / reproduce 2 channels of each of a video signal and an audio signal in the same recording area of the recording medium at the transfer speed of the conventional recording medium without using an image memory. It is a thing.

[0013]

In order to achieve the first object, the recording / reproducing apparatus of the present invention uses an interlace type video signal for forming one screen with an odd field and an even field, respectively. A recording / reproducing apparatus for recording / reproducing an audio signal to / from a track, and recording / reproducing an audio signal, the recording medium transporting unit moving a recording position of a recording medium according to recording or reproduction, and a first audio of the recording medium. A first audio recording / reproducing means for recording / reproducing an audio signal to / from an audio track; a second audio recording / reproducing means for recording / reproducing an audio signal to / from a second audio track on the recording medium; A video recording means for recording an odd field of an external video signal to the video track on an odd track or an even field on an even track; Video reproducing means for outputting a 2-channel video signal created by separating the reproduction signal of the odd-numbered track and the reproduction signal of the even-numbered track of the video track, the recording medium transfer means, and the first and second audio recordings. It is provided with a reproducing means, the video recording means, and an operation command means for outputting an operation state command signal to the video reproducing means.

In order to achieve the above second object, the recording / reproducing apparatus of the present invention provides an interlace type video signal forming one screen with an odd field and an even field to an odd track and an even track, respectively. A recording / reproducing apparatus for recording / reproducing audio signals and recording / reproducing audio signals. Sound reproducing means for reproducing a two-channel sound signal, sound synthesizing means for outputting a sound recording signal obtained by modulating and synthesizing a sound signal from the outside and one sound signal output from the sound reproducing means, and the sound. Audio recording means for recording the audio recording signal on an audio track, and an odd number of external video signals for the video track of the recording medium. A video recording means for recording a field on an odd track or an even field on an even track, and a 2-channel video signal created by separating a reproduction signal of the odd track and a reproduction signal of the even track of the video track are output. Motion reproducing means, recording medium transporting means, audio reproducing means, audio synthesizing means, audio recording means, video recording means, and operation commanding means for outputting an operation state command signal to the video reproducing means. It has and.

Further, in order to achieve the third object, the recording / reproducing apparatus of the present invention provides an interlace type video signal forming one screen with an odd field and an even field to an odd track and an even track, respectively. A recording / reproducing apparatus for recording / reproducing audio signals and recording / reproducing audio signals. Sound reproducing means for reproducing a two-channel sound signal, sound synthesizing means for outputting a sound recording signal obtained by modulating and synthesizing a sound signal from the outside and one sound signal output from the sound reproducing means, and the sound. Audio recording means for recording the audio recording signal on an audio track, and reproduction signals of even-numbered tracks of the video tracks of the recording medium A video reproduction means for outputting a 2-channel video signal generated by separating the reproduction signal of the rack and an external video signal and one of the video signals output from the video reproduction means are alternately selected in field units. Thus, a video synthesizing means for creating and outputting video signals of the odd field and the even field, a video recording means for recording the video signal of the output of the video synthesizing means on the video track, the recording medium transferring means, and the The audio reproducing means, the audio synthesizing means, the audio recording means, the video reproducing means, the video synthesizing means, and the operation commanding means for outputting an operation state command signal to the video recording means are provided.

Further, in order to achieve the above-mentioned fourth object, the recording / reproducing apparatus of the present invention provides an interlace system video signal forming one screen with an odd field and an even field to an odd track and an even track, respectively. A recording / reproducing apparatus for recording / reproducing an audio signal as well as recording / reproducing, and recording medium reproducing means for moving a recording position of a recording medium according to recording or reproduction, and time axis compression from an audio track of the recording medium. A voice reproducing means for reproducing a two-channel voice signal that is modulated and synthesized including, a signal obtained by time-axially compressing an external voice signal for two fields into one field or less, and one voice output from the voice reproducing means. A voice synthesizing means for outputting a voice recording signal obtained by modulating and synthesizing a signal, and a position of the voice track reproduced by the voice reproducing means. Audio recording means for recording the audio recording signal, video recording means for recording an odd field of an external video signal on an odd track, or an even field on an even track of a video track of the recording medium, and Video reproducing means for outputting a two-channel video signal created by separating the reproduction signal of the odd-numbered track and the reproduction signal of the even-numbered track of the video track, the recording medium transfer means, the video reproduction means, and the video recording means. And an operation instruction means for outputting an operation state instruction signal to the voice reproduction means, the voice synthesis means and the voice recording means.

Further, in order to achieve the second object, the recording / reproducing apparatus of the present invention provides an interlace type video signal forming one screen with an odd field and an even field to an odd track and an even track, respectively. A recording / reproducing apparatus for recording / reproducing and recording / reproducing an audio signal and moving a recording position of a recording medium by synchronizing fields of an external video signal and a reproduced video signal, and the recording medium. Sound recording means for recording a sound signal on the sound track of, and sound reproducing means for reproducing a two-channel sound signal recorded at a position preceding the recording position of the sound recording means by an even multiple field, from the outside. Voice synthesizing means for synthesizing the voice signal of 1 and the one voice signal output from the voice reproducing means and outputting the synthesized voice signal to the voice recording means, Video recording means for recording a video signal on a video track of a recording medium, and reproduction signals of odd tracks and even tracks in a video signal recorded at a position preceding the recording position of the video recording means by an even multiple field An odd number is obtained by alternately selecting, in field units, a video reproducing means for outputting a two-channel video signal generated by separating the signal and an external video signal and one of the video signals output from the video reproducing means. Video synthesizing means for creating video signals of fields and even fields and outputting them to the video recording means, the recording medium transporting means, the audio reproducing means, the audio synthesizing means, the audio recording means, the video reproducing means, and the video. It is provided with an operation command means for outputting an operation state command signal to the synthesizing means and the video recording means.

[0018]

According to the present invention having the above-described structure, at the time of recording, the operation instructing means outputs a desired recording instruction to each section, whereby the recording medium transferring means moves the recording medium at a predetermined speed, and the first ( Alternatively, the second) audio recording / reproducing means records an external audio signal on the first (or second) audio track. Further, the video recording means records only the odd field (or even field) signal of the video signal from the outside on the odd track (or even track) of the video track. In this way, the audio signal and the video signal from the outside are recorded on the odd tracks of the first audio track and the video track, respectively. Further, when recording the audio signal and the video signal of the second channel, after returning the recording position of the recording medium to the starting end, the recording target track is changed,
By performing the recording similar to the above, the audio signal and the video signal of the second channel from the outside are recorded on the even-numbered tracks of the second audio track and the video track, respectively. With the above operation, it is possible to record the audio signal and the video signal of two channels respectively. Next, at the time of reproduction, the operation command unit outputs a desired reproduction command to each unit, so that the recording medium transfer unit moves the recording medium at a predetermined speed, and the first and second audio recording / reproducing units operate. Audio signals are reproduced and output from the first and second audio tracks, respectively. Further, the video reproduction means alternately reproduces the video signals of the odd-numbered tracks and the video signals of the even-numbered tracks of the video tracks to create and output video signals separated from each other. With the above operation, it is possible to simultaneously reproduce the audio signal and the video signal of two channels respectively.

Further, with the above configuration, at the time of recording,
The operation command means outputs a command for desired recording to each section.
Therefore, the recording medium transfer means transfers the recording medium at a predetermined speed. At this time, the audio reproducing means reproduces the modulated and synthesized audio signals of the first and second channels from the already recorded audio track, and the audio synthesizing means reproduces the second of the outputs of the audio reproducing means. The audio signal of the (or the first) channel and the audio signal from the outside are respectively set to the second and the first.
The audio recording signal which is modulated and synthesized is output as the channel of, and the audio recording means records the audio recording signal output from the audio synthesizing means on the audio track. Further, the video recording means records only the odd field (or even field) signal of the video signal from the outside on the odd track (or even track) of the video track. In this way, the audio signal and the video signal from the outside are recorded on the first channel of the audio track and the odd-numbered tracks of the video track, respectively. Further, when recording the audio signal and the video signal of the second channel, after returning the recording position of the recording medium to the starting end, the recording target channel of the audio and the recording target field of the video are changed to perform the same recording as above. By doing so, the audio signal and the video signal of the second channel from the outside are recorded on the second channel of the audio track and the even-numbered tracks of the video track, respectively. With the above operation, it is possible to record the audio signal and the video signal of two channels respectively. Next, at the time of reproduction, the operation instruction means outputs a desired reproduction instruction to each part, so that the recording medium transfer means moves the recording medium at a predetermined speed, and the audio reproduction means makes an already recorded audio track. The audio signals of the first and second channels that have been modulated and synthesized from are reproduced and output.
Further, the video reproduction means alternately reproduces the video signals of the odd-numbered tracks and the video signals of the even-numbered tracks of the video tracks to create and output video signals separated from each other. With the above operation, it is possible to simultaneously reproduce the audio signal and the video signal of two channels respectively.

Further, with the above structure, at the time of recording,
The operation command means outputs a command for desired recording to each section.
Therefore, the recording medium transfer means transfers the recording medium at a predetermined speed. At this time, the audio reproducing means reproduces the modulated and synthesized audio signals of the first and second channels from the already recorded audio track, and the audio synthesizing means reproduces the second of the outputs of the audio reproducing means. The audio signal of the (or the first) channel and the audio signal from the outside are respectively set to the second and the first.
The audio recording signal which is modulated and synthesized is output as the channel of, and the audio recording means records the audio recording signal output from the audio synthesizing means on the audio track. Further, the video reproducing means alternately reproduces the video signals of the odd-numbered tracks and the video signals of the even-numbered tracks of the recorded video tracks, and creates and outputs the video signals of the first and second channels separated from each other. To do. The video synthesizing means outputs the video signal of the second (or first) channel and the video signal from the outside of the output of the video reproducing means as video signals corresponding to even and odd fields, respectively. The video recording means sequentially records the video signal output from the video synthesizing means on a field-by-field basis on the video track already reproduced by the video reproducing means. In this way, the audio signal and the video signal from the outside are recorded on the first channel of the audio track and the odd-numbered tracks of the video track, respectively. Further, when recording the audio signal and the video signal of the second channel, after returning the recording position of the recording medium to the starting end, the recording target channel of the audio and the recording target field of the video are changed to perform the same recording as above. By doing so, the audio signal and the video signal of the second channel from the outside are recorded on the second channel of the audio track and the even-numbered tracks of the video track, respectively. With the above operation, it is possible to record the audio signal and the video signal of two channels respectively. Next, at the time of reproduction, the operation instruction means outputs a desired reproduction instruction to each part, so that the recording medium transfer means moves the recording medium at a predetermined speed, and the audio reproduction means makes an already recorded audio track. The audio signals of the first and second channels that have been modulated and synthesized from are reproduced and output. Further, the video reproducing means alternately reproduces the video signals of the odd-numbered tracks and the video signals of the even-numbered tracks of the video tracks, and separates the first and second second signals from each other.
Creates and outputs the video signal of the channel. With the above operation, it is possible to simultaneously reproduce the audio signal and the video signal of two channels respectively.

Further, with the above structure, at the time of recording,
The operation command means outputs a command for desired recording to each section.
Therefore, the recording medium transfer means transfers the recording medium at a predetermined speed. At this time, the audio reproducing means reproduces the audio signals of the first and second channels that are modulated and combined including the time axis compression from the already recorded audio track, and the audio synthesizing means outputs the audio reproducing means. Of the second (or first) channel of these signals and a signal obtained by externally compressing the audio signals of two fields into one field or less are modulated and synthesized as the second and first channels, respectively. The voice recording signal is output, and the voice recording unit records the voice recording signal output from the voice synthesizing unit at the position of the voice track reproduced by the voice reproducing unit. Further, the video recording means records only the odd field (or even field) signal of the video signal from the outside on the odd track (or even track) of the video track. In this way, the time-axis compressed signal and the video signal of the audio from the outside are recorded on the first channel of the audio track and the odd-numbered tracks of the video track, respectively. Further, when recording the audio signal and the video signal of the second channel, after returning the recording position of the recording medium to the starting end, the recording target channel of the audio and the recording target field of the video are changed to perform the same recording as above. By doing so, the time-axis compressed signal and the video signal of the audio of the second channel from the outside are recorded on the second channel of the audio track and the even-numbered tracks of the video track, respectively. With the above operation, it is possible to record the audio signal and the video signal of two channels respectively. Next, at the time of reproduction, the operation instruction means outputs a desired reproduction instruction to each part, so that the recording medium transfer means moves the recording medium at a predetermined speed, and the audio reproduction means makes an already recorded audio track. 1st modulated and synthesized from
The second audio signal of the second channel is reproduced and output. Further, the video reproduction means alternately reproduces the video signals of the odd-numbered tracks and the video signals of the even-numbered tracks of the video tracks to generate and output the video signals of the first and second channels separated from each other. With the above operation, it is possible to simultaneously reproduce the audio signal and the video signal of two channels respectively.

Further, with the above configuration, at the time of recording,
The operation command means outputs a command for desired recording to each section.
Therefore, the recording medium transfer means transfers the recording medium at a predetermined speed. At this time, the audio reproducing means reproduces the modulated and synthesized audio signals of the first and second channels from the already recorded audio track, and the audio synthesizing means reproduces the second () of the outputs of the audio reproducing means. Alternatively, the audio signal of the first channel and the audio signal from the outside are respectively supplied to the second and first channels.
The audio recording signal synthesized as the channel is output, and the audio recording unit records the audio recording signal output from the audio synthesizing unit on the audio track. Further, the video reproducing means alternately reproduces the video signals of the odd-numbered tracks and the video signals of the even-numbered tracks of the recorded video tracks, and creates and outputs the video signals of the first and second channels separated from each other. To do. The video signal reproduced at this time is synchronized with the video signal from the outside. The video synthesizing means outputs the video signal of the second (or first) channel and the video signal from the outside of the output of the video reproducing means as video signals corresponding to even and odd fields, respectively. The video recording means sequentially records the video signal output from the video synthesizing means on the video track at a position delayed by an even multiple field from the reproduction position. In this way, the audio signal and the video signal from the outside are recorded on the first channel of the audio track and the odd-numbered tracks of the video track, respectively. Further, when recording the audio signal and the video signal of the second channel, after returning the recording position of the recording medium to the starting end, the recording target channel of the audio and the recording target field of the video are changed to perform the same recording as above. By doing so, the audio signal and the video signal of the second channel from the outside are recorded on the second channel of the audio track and the even-numbered tracks of the video track, respectively. With the above operation, it is possible to record the audio signal and the video signal of two channels respectively. Next, at the time of reproduction, the operation instruction means outputs a desired reproduction instruction to each part, so that the recording medium transfer means moves the recording medium at a predetermined speed, and the audio reproduction means makes an already recorded audio track. The audio signals of the first and second two channels synthesized from are reproduced and output. Further, the video reproduction means alternately reproduces the video signals of the odd-numbered tracks and the video signals of the even-numbered tracks of the video tracks to generate and output the video signals of the first and second channels separated from each other. With the above operation, it is possible to simultaneously reproduce the audio signal and the video signal of two channels respectively.

[0023]

(Embodiment 1) A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the structure of the recording / reproducing apparatus in the first embodiment. In FIG. 1, reference numeral 1 is a tape having a surface coated with a magnetic substance and serving as a recording medium,
Reference numeral 11 is an operation command circuit that outputs a command (C1 signal) of any one of a stop command, a frame recording command, an odd field recording command, an even field recording command, and a reproduction command, and 201 outputs a rotation speed signal and transfers the tape 1. A capstan serving as a driving source for performing the operation, a pinch roller 202 for pressing the tape 1 onto the capstan 201, a control head 203 for recording a control signal indicating a recording position of an audio signal and a video signal, and a reference numeral 204 for an image. Reference oscillator for generating a reference signal of one frame period, 205 is a field discriminating circuit for detecting whether it is an odd field or an even field of an external video signal, 210
Is a switch that outputs the output signal of the reference oscillator 204 when the output of the operation command circuit 11 is a reproduction command and outputs the output signal of the field determination circuit 205 when the output of the operation command circuit 11 is other than the reproduction command. 206 is an output of the operation command circuit 11. When the stop command is given, the capstan 201 is stopped, and when the frame recording command is given, the capstan 201 is rotated at a constant speed based on the rotation speed signal from the capstan 201, and the odd field recording command or the even field recording command or At the time of the reproduction command, the capstan 201 is rotated at a constant speed based on the rotation speed signal from the capstan 201, and the phase relationship between the control signal reproduced by the control head 203 and the output signal of the switch 210 is made constant. A capstan control circuit, 207 is an operation command circuit 11
Is a frame recording command, the control head 203 is connected to the field discriminating circuit 205, and when it is not a frame recording command, the switch is connected to the capstan control circuit 206. 208 is the tape 1 obliquely attached to the side surface of the cylinder. Cylinders 401 and 402, which are rotated by winding once and output a rotation position signal and a rotation speed signal, are attached to the cylindrical side surface of the cylinder 208 so as to face each other by 180 degrees, and are odd-numbered tracks and even-numbered tracks of the video track of the tape 1, respectively. A video head that scans or forms a track, and 209 is a rotation phase signal (C2 signal) that indicates which of the video head 401 or 402 is scanning the video track based on the rotation position signal and the rotation speed signal of the cylinder 208. Phase detection circuit for creating and outputting
Cylinder control circuit for rotating the cylinder 208 at a constant speed on the basis of the rotation speed signal from 08, and for making the phase relationship between the output signal (C2 signal) of the rotation phase detection circuit 209 and the output signal of the switch 210 constant. 2 is a capstan 201, a pinch roller 202, and a control head 20.
3, a reference oscillator 204, a field discrimination circuit 205, a capstan control circuit 206, switches 207 and 210, a cylinder 208, a rotational phase detection circuit 209, and a cylinder control circuit 211, and a recording medium transfer means 301,
Reference numeral 302 is an audio head for recording and reproducing on the first and second audio tracks, respectively, and 303 is an operation command circuit 1
When the output of 1 is a frame recording command or an odd field recording command, an audio signal from the outside is modulated and supplied to the audio head 301, and when a reproduction command, a stop command or an even field recording command, a signal from the audio head 301. A voice recording / reproducing circuit for outputting a voice signal demodulated by
When the output of the operation command circuit 11 is a frame recording command or an even field recording command, an external audio signal is modulated and supplied to the audio head 302, and when a reproduction command, a stop command, or an odd field recording command, a sound is output. An audio recording / reproducing circuit that demodulates a signal from the head 302 and outputs an audio signal, 305 is a first audio recording / reproducing means including an audio head 301 and an audio recording / reproducing circuit 303, 3
Reference numeral 06 denotes a second audio recording / reproducing means including an audio head 302 and an audio recording / reproducing circuit 304, 403 is a video demodulating circuit for demodulating a signal input to an input terminal and outputting a video signal, and 404 is a rotational phase detection. When the output (C2 signal) of the circuit 209 indicates an odd track, the video head 40
When 1 is selected and connected to a common terminal to indicate an even track, a switch that selects the video head 402 and connects to the common terminal, 405 is a video modulation circuit that modulates and outputs a video signal from the outside, 406 is a switch for connecting or disconnecting the output of the video modulation circuit 405 to the output terminal,
Reference numeral 407 denotes an output terminal of the switch 406 and the switch 40 when the output of the operation command circuit 11 is a frame recording command, an odd field recording command, or an even field recording command.
4 is a switch for connecting the input terminal of the video demodulation circuit 403 and the common terminal of the switch 404 when a reproduction command or a stop command is issued, and 408 operates based on the output of the rotational phase detection circuit 209. When the output of the command circuit 11 is a reproduction command or a stop command, the switch 406 is always closed, and when the output of the operation command circuit 11 is a frame recording command, the switch 406 is always connected, and when an odd field recording command, A recording timing circuit that outputs a signal (C3 signal) that switches the switch 406 to the connected state only on the even-numbered tracks when the switch 406 is connected to the odd-numbered track only and the even field recording command is issued.
Reference numeral 409 is a simple video generation circuit for outputting a video signal showing black for the entire section by using the output signal (C2 signal) of the rotary phase detection circuit 209 as a field switching synchronization signal, and 410 is an output of the rotary phase detection circuit 209 indicating an odd number of tracks. Switch 411 for outputting the output signal of the video demodulation circuit 403 and outputting the output signal of the simple video generation circuit 409 when the even-numbered tracks are shown, and the output 411 of the rotation phase detection circuit 209 indicates the even-numbered tracks. Switch 41 for outputting the output signal of the video demodulation circuit 403, and for outputting the output signal of the simple video generation circuit 409 when indicating an odd number of tracks, 41 is the video heads 401, 402 and switches 404, 406, 407. A video recording unit composed of a video modulation circuit 405 and a recording timing circuit 408, and 42 a video head 01,402 a video demodulation circuit 4
03, switches 404, 407, 410, 411, and a simple video generation circuit 409, a video reproduction means 50.
Reference numerals 1 and 502 denote erasing heads that scan the tracks scanned by the video heads 401 and 402 in advance, 503 an erasing circuit that outputs an erasing signal, and 504 denotes a head 501.
Switch for connecting 502 and erase circuit 503, 5
Reference numeral 05 is an erasing timing circuit that switches the switch 504 to the connected state at the scanning timing of the head 501 or head 502 based on the output signal (C3 signal) of the recording timing circuit 408, and 51 is the heads 501 and 502, the erasing circuit 503, and the switch 504. And an erasing timing circuit 505.

FIG. 2 is a recording track diagram in the first embodiment. In FIG. 2, 1 is a tape having a surface coated with a magnetic material and serving as a recording medium, 110 and 111 are audio tracks formed by the audio heads 301 and 302, and 112 is an image formed by the video head 402. Even track, 113 is the video head 401
Is an odd-numbered track for image formation, and 114 is a control track formed by the control head 203.

FIG. 3 is a timing chart showing the relationship between the recording signal and the reproducing signal on the tape 1 in the first embodiment.

In FIG. 3, S1 is an odd field (odd track 113) and an even field (even track 11) according to a frame recording command of the operation command circuit 11.
2) the recorded video signals, S2 and S3 are the same audio signals recorded on the audio tracks 111 and 110 respectively by the frame recording command of the operation command circuit 11, S2.
4 is a video signal in which the signal of the even field (even track 112) is rewritten into an external video signal by performing even field recording by the even field recording command of the operation command circuit 11, and S5 is an even field of the operation command circuit 11. An audio signal that does not rewrite the audio signal S2 even if even field recording is performed by a recording command, S6
By performing even field recording in accordance with the even field recording command of the operation command circuit 11
The signal of No. 1 is an audio signal rewritten by an external audio signal, and S7 is created by making the video of the odd track 113 of the video signal S4 recorded on the tape 1 an odd field and the video corresponding to a black screen an even field. 1 is a reproduced video signal, S8 is a first reproduced audio signal obtained by reproducing the audio signal recorded on the audio track 111 of the tape 1, and S8 is
Reference numeral 9 is a second reproduction video signal created by using the video of the even track 112 of the video signal S4 recorded on the tape 1 as an even field and the video corresponding to a black screen as an odd field, and S10 is an audio track 110 of the tape 1. It is a second reproduced audio signal obtained by reproducing the audio signal recorded in 1.

The operation of the recording / reproducing apparatus of the first embodiment constructed as above will be described below with reference to the operation command circuit 11.
The output (C1 signal) will be described.

First, when the operation command circuit 11 outputs a stop command, the capstan control circuit 206 causes the capstan 2 to operate.
Since 01 is stopped, the transfer of the tape 1 is stopped. The audio recording / reproducing circuits 303 and 304 perform the demodulation operation of the signals from the audio heads 301 and 302, respectively, but the audio signal cannot be obtained because the transfer of the tape 1 is stopped. Further, the switch 407 connects the input terminal of the video demodulation circuit 403 and the common terminal of the switch 404, and the video demodulation circuit 403 performs the demodulation operation of the input signal, but since the transfer of the tape 1 is stopped, the normal video No signal is obtained.

Next, when the operation command circuit 11 outputs a frame recording command, the switch 207 connects the output of the field discrimination circuit 205 to the control head 203,
The switch 210 connects the output of the field discriminating circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 rotates the capstan 201 at a constant speed, so that the tape 1 is transferred at a constant speed and is also transferred to the control track 114. Control signals at regular intervals are recorded. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211, and the cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 205 from the switch 210.
While maintaining a constant phase relationship with the output signal of the cylinder 2
By rotating 08 at a constant speed, the timing for forming the odd track 113 with the video head 401 in the odd field of the video signal from the outside and the timing for forming the even track 112 with the video head 402 in the even field is obtained. Also, the recording timing circuit 408 is a switch 406.
And the switch 407 connects the output terminal of the switch 406 and the common terminal of the switch 404,
The switch 404 supplies the output of the switch 407 to the video head 401 when the video head 401 is scanning the video track based on the output of the rotation phase detection circuit 209, and the video head 402 scans the video track. When it is on, the output of the switch 407 is supplied to the video head 402. That is, the odd field of the video signal from the outside is recorded on the odd track 113, and the even field is recorded on the even track 112 to obtain the video signal S1. Further, since the audio recording / reproducing circuits 303 and 304 modulate the audio signals from the outside and supply them to the audio heads 301 and 302, respectively, the audio tracks 110 and 11 of the tape 1
Audio signals S2 and S3 having the same content are recorded in 1. Further, the erasing timing circuit 505 switches the switch 5 based on the output signal (C3 signal) of the recording timing circuit 408.
In order to always connect 04 to the connection state, an erasing signal from the erasing circuit 503 is supplied to the erasing heads 501 and 502, and the recorded information on the video track is erased prior to the video heads 401 and 402.

Next, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs an even field recording command, the switch 207 connects the output of the control head 203 to the capstan control circuit 206, and the switch Reference numeral 210 connects the output of the field discrimination circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 controls the control signal from the switch 207 and the field discrimination circuit 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 5 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the field discrimination circuit 205. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211,
The cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 20 from the switch 210.
By rotating the cylinder 208 at a constant speed while maintaining a constant phase relationship with the output signal of No. 5, the video head 401 scans the odd track 113 in the odd field of the video signal from the outside, and the video in the even field. The timing for scanning the even-numbered tracks 112 with the head 402 is obtained. The recording timing circuit 408 sets the switch 406 to the connection state while the video head 402 scans the even-numbered track 112 based on the output signal (C2 signal) of the rotation phase detection circuit 209, and the switch 407 outputs the output of the switch 406. The terminal and the common terminal of the switch 404 are connected to each other, and the switch 404 causes the video head 401 to output the odd-numbered tracks 113 based on the output of the rotational phase detection circuit 209.
The output of the switch 407 is supplied to the video head 401 during scanning of
When scanning 12, the output of the switch 407 is supplied to the video head 402. That is, only the even field of the video signal from the outside is recorded on the even track 112, and the supply of the video signal is cut off by the switch 406 during the period of the odd field, so that the recording is not performed and the video signal S4 is obtained. In addition, the audio recording / reproducing circuit 303 includes an audio track 110 of the tape 1 to be reproduced by the audio head 301.
The audio signal S5 obtained by demodulating the signal of is output. Since the audio recording / reproducing circuit 304 modulates an audio signal from the outside and supplies it to the audio head 302, the audio signal S6 is recorded on the audio track 111 of the tape 1. Further, based on the output signal (C3 signal) of the recording timing circuit 408, the erasing timing circuit 505 puts the switch 504 in the connected state while the erasing head 502 scans the even-numbered tracks 112, so erasing from the erasing circuit 503 is performed. A signal is supplied to the erasing head 502, and only the recorded information on the even track 112 is erased prior to the video head 402.

Similarly, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs an odd field recording command, the odd field of the video signal from the outside is recorded on the odd track 113, and the external field is recorded. The audio signal is recorded on the audio track 110. At this time, only the recording information of the odd-numbered track 113 is erased prior to the video head 401 for recording.

Next, in the tape 1 recorded by performing the even-track recording operation after the above-mentioned frame recording operation,
When the operation command circuit 11 outputs a reproduction command, the switch 2
Reference numeral 07 connects the output of the control head 203 to the capstan control circuit 206, switch 210 connects the output of the reference oscillator 204 to the capstan control circuit 206,
The capstan control circuit 206 controls the control signal from the switch 207 and the reference oscillator 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 4 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the reference oscillator 204. Further, the switch 210 connects the output signal of the reference oscillator 204 to the cylinder control circuit 211, and the cylinder control circuit 211 keeps the phase relationship between the output signal of the rotation phase detection circuit 209 and the output signal of the reference oscillator 204 from the switch 210 constant. By rotating the cylinder 208 at a constant speed while maintaining
3 is obtained, and the timing at which the video head 402 scans the even-numbered tracks 112 is obtained. On the other hand, the recording timing circuit 408 turns off the switch 406, and the erase timing circuit 505 turns off the switch 504.
The output of the image modulation circuit 405 and the output of the erasing circuit 503 are not transmitted. The switch 404 connects the output of the video head 401 to the switch 407 when the video head 401 is scanning the odd-numbered track 113 based on the output of the rotation phase detection circuit 209, and the video head 402 scans the even-numbered track 112. The video head 40
2 is connected to the switch 407, and the switch 407 connects the output from the switch 404 to the video demodulation circuit 403. The video demodulation circuit 403 sequentially demodulates the input signal into a video signal and outputs it. The simple video generation circuit 409 outputs a black video signal for the entire section of the odd field and scans the even track 112 while scanning the odd track 113 based on the output signal (C2 signal) of the rotation phase detection circuit 209. , The black video signal is output for the entire section of the even field. Therefore, when the switch 410 scans the odd-numbered tracks 113 based on the output signal (C2 signal) of the rotation phase detection circuit 209, the video demodulation circuit 403.
When the even track 112 is scanned, the output signal of the simple video generation circuit 409 is output, so that the first reproduced video signal S7 (V1) is obtained. The switch 411 outputs the output signal of the video demodulation circuit 403 when scanning the even-numbered track 112 based on the output signal (C2 signal) of the rotation phase detection circuit 209, and outputs the output signal of the video demodulation circuit 403, and when scanning the odd-numbered track 113, Video generation circuit 40
9 is output, the second reproduced video signal S9 is output.
(V2). Furthermore, the audio recording / reproducing circuit 303
An audio recording / reproducing circuit 304 outputs a first reproduced audio signal S8 obtained by demodulating the signal of the audio track 110 of the tape 1 reproduced by the audio head 301, and the audio recording / reproducing circuit 304 reproduces the audio track 111 of the audio track 111 of the tape 1 reproduced by the audio head 302. The second reproduced audio signal S10 obtained by demodulating the signal is output.

As described above, in the first embodiment,
It becomes possible to record / reproduce independent 2-channel video signals on the odd-numbered tracks 113 and even-numbered tracks 112, and record / reproduce independent 2-channel audio signals.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a block diagram showing the structure of the recording / reproducing apparatus in the second embodiment. In FIG. 4, FIG.
The same parts as those in FIG. 20
Numeral 8 is a cylinder for outputting the rotation position signal and the rotation speed signal by winding the tape 1 obliquely on the side surface of the cylinder for 180 degrees or more, and 601 is attached to the side surface of the cylinder of the cylinder 208 and is a video track of the tape 1. And a recording head for forming an odd number of audio tracks, 602
Is a cylinder 2 that faces the recording head 601 by 180 degrees.
The recording heads 603 and 604 are attached to the cylindrical side surface of the cylinder 208 to form even tracks of the video track and the audio track of the tape 1. The recording heads 603 and 604 are opposed to the cylindrical side surface of the cylinder 208 by 180 degrees. A reproducing head for scanning the tracks scanned by 601 and 602 in advance and reading the recorded information, and 209, which is the reproducing head 603 or 604 based on the rotation position signal and the rotation speed signal of the cylinder 208. A rotation phase detection circuit that creates and outputs a rotation phase signal (C2 signal) indicating whether or not scanning is performed. Reference numeral 507 is for scanning an odd number track after the reproducing head 603 and before the recording head 601 to erase the recording signal. Erasing head, 50
8 is an erasing head for erasing a recording signal by scanning even tracks after the reproducing head 604 and before the recording head 602, and 509 and 510 connect the output signals of the erasing circuit 503 to the erasing heads 507 and 508, respectively. Switch 511 is for connecting the switches 509 and 510 when the output of the operation command circuit 11 is a frame recording command, and the erasing head 507 is for an odd field recording command.
Switches the switch 509 to the connected state at the timing of scanning the odd-numbered tracks for video and audio, and switches the switch 510 to the connected state at the timing at which the erasing head 508 scans the even-numbered track for audio. , The switch 510 at the timing when the erasing head 508 scans the even tracks for video and audio.
And an erasing timing circuit for activating the switch 509 at the timing when the erasing head 507 scans an odd number of audio tracks. 605 connects or disconnects the output of the reproducing head 603 or 604 to the video demodulation circuit 403. Switch 606, the operation command circuit 11
When the output of is the stop command, the cutoff signal is sent to the switch 605.
Is output to the rotation phase detection circuit 20 except for the stop command.
A reproduction video synchronizing circuit for outputting a signal for selecting the output signal of the reproduction head 603 or 604 scanning the video track based on the output signal of C. 9 (C2 signal) to the switch 605, and 607 of the reproduction head 603 or 604. A switch for connecting or disconnecting an output, 608 outputs a cutoff signal to the switch 605 when the output of the operation command circuit 11 is a stop command, and outputs a signal (C2 signal) of the rotation phase detection circuit 209 when the output is other than the stop command. ), A reproduction audio synchronizing circuit which outputs a signal for selecting an output signal of the reproducing head 603 or 604 which is scanning the audio track to the switch 607, and 609 is a signal before the output signal of the switch 607 is compressed. An expansion circuit 610 for axial expansion demodulates the output of the expansion circuit 609 to reproduce the reproduced audio signal A1 of the first channel. Second channel of the reproduced audio signal A
2 is a voice demodulation circuit, 611 is an operation command circuit 11
Is a switch for outputting a reproduction audio signal A2 when the output is an odd field recording command, and a reproduction audio signal A1 for an even field recording command, and 612 is a switch when the output of the operation command circuit 11 is a reproduction command or a stop command. , When signal output is stopped and a frame recording command is issued, an audio signal from the outside is modulated and output, and when an odd field recording command (even field recording command), the audio signal from the outside is first
The (second) channel is an audio modulation circuit that modulates and synthesizes the audio signal of the output of the switch 611 as the second (first) channel, and outputs the modulated signal. 613 is an output signal (C2 signal) of the rotational phase detection circuit 209. A compression circuit that outputs the output signals of the two fields of the audio modulation circuit 612 in a time-axis compression to output one field or less in synchronization with the output, 614 is a switch for connecting or disconnecting the output signal of the compression circuit 613, and 615 is an operation. When the output of the command circuit 11 is a stop command or a reproduction command, the switch 614 is turned off. When a frame command, an odd field recording command, or an even field recording command, the recording heads 601 and 602 make the audio tracks based on the C2 signal. A recording and audio synchronizing circuit for setting the switch 614 to a connection state at the timing of scanning and forming When the output of the operation command circuit 11 is a frame command, the switch 406 is connected, and when the odd field recording command, the switch 406 is connected at the timing when the recording head 601 forms a video track, and the even field recording command is output. When the recording head 602
Switch 40 at the timing when a video track is formed
6, 618, 618 for recording video synchronization circuit for connecting 6
Is a switch that switches the output of the switch 614 and the switch 406 to connect to the recording heads 601 and 602, respectively. 619 is a switch based on the output of the rotational phase detection circuit 209 at the timing when the recording head 601 forms a video track. The output of 406 is connected to the recording head 601, and the output of the switch 614 is connected to the recording head 60.
2 and the output of the switch 406 is applied to the recording head 6 at the timing when the recording head 602 forms a video track.
02, and a recording signal determination circuit that outputs a signal connecting the output of the switch 614 to the recording head 601 to the switches 617 and 618; 52 is an erasing circuit 503, erasing heads 507 and 508, switches 509 and 510, and erasing timing. Erasing means composed of the circuit 511 and 61
Are reproducing heads 603 and 604 and switches 410 and 41.
1, 605, video demodulation circuit 403, and simple video generation circuit 4
09 and a playback video synchronizing circuit 606, a video playback means 62, and playback heads 603 and 604 and a switch 60.
7 and a reproduced voice synchronization circuit 608, a decompression circuit 609 and a voice demodulation circuit 610, a voice reproduction means 63, a voice synthesis means composed of a switch 611 and a voice modulation circuit 612, and a compression circuit 613 and a switch 64. 614, 61
7, 618, a recording audio synchronizing circuit 615, a recording signal determining circuit 619, and recording heads 601 and 602, and 65 is a video modulating circuit 405 and a switch 40.
6, 617 and 618, a recording video synchronizing circuit 616, a recording signal determining circuit 619, and recording heads 601 and 602.

FIG. 5 is a recording track diagram in the second embodiment. 5, parts that are the same as those shown in FIG. 2 are given the same reference numerals, and descriptions thereof will be omitted. 115 is a recording head 601
An odd-numbered track for video formed by the recording head 602, an even-numbered track for video formed by the recording head 602, 117 an odd-numbered track for audio formed by the recording head 601, and 118 an audio formed by the recording head 602. For even tracks.

FIG. 6 is a timing chart showing the relationship between the recording signal and the reproducing signal on the tape 1 in the second embodiment.

In FIG. 6, S11 is an operation command circuit 11
Of the video signal recorded on the odd-numbered track 115 and the even-numbered track 116 by the frame recording command of S, S12 is the audio signal recorded on the odd-numbered track 117 and the even-numbered track 118 by the frame recording command of the operation command circuit 11, and S13 is the operation. A video signal in which the signal of the even field (even track 112) is rewritten to the video signal from the outside by performing the even field recording by the even field recording command of the command circuit 11, and S14 is the even field recording command of the operation command circuit 11. By performing even field recording, the audio signal recorded by compressing, modulating and synthesizing the audio signal obtained by expanding and demodulating the audio signal S12 as the first channel and the external audio signal as the second channel, Of the video signal S13 recorded on the tape 1 The image of several tracks 115 and odd field, the first reproduced video signal to create the image corresponding to the black screen as the even field, S16 tape 1
Is a first reproduction audio signal obtained by expanding, separating and demodulating the audio track signal, S17 is an even field of the video of the even signal 116 of the video signal S13 recorded on the tape 1, and an image corresponding to a black screen is an odd field. A second reproduced video signal created as a field, S18 is a second reproduced audio signal obtained by expanding, separating, and demodulating the audio track signal of the tape 1.

The operation of the recording / reproducing apparatus of the second embodiment having the above-described structure will be described below.
The output (C1 signal) will be described.

First, when the operation command circuit 11 outputs a stop command, the capstan control circuit 206 causes the capstan 2 to operate.
Since 01 is stopped, the transfer of the tape 1 is stopped. Recording heads 601 and 602 and reproducing heads 603 and 60
The scanning position of 4 does not move, and the recording operation and the reproducing operation cannot be performed.

Next, when the operation command circuit 11 outputs a frame recording command, the switch 207 connects the output of the field discrimination circuit 205 to the control head 203,
The switch 210 connects the output of the field discriminating circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 rotates the capstan 201 at a constant speed, so that the tape 1 is transferred at a constant speed and is also transferred to the control track 114. Control signals at regular intervals are recorded. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211, and the cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 205 from the switch 210.
While maintaining a constant phase relationship with the output signal of the cylinder 2
By rotating 08 at a constant speed, the timing for forming the odd track 115 by the recording head 601 in the odd field of the video signal from the outside and the timing for forming the even track 116 in the recording head 602 in the even field is obtained. On the other hand, the voice modulation circuit 612 modulates and synthesizes the voice signal from the outside as the first and second channels and outputs it. The compression circuit 613 synchronizes with the output signal of the rotation phase detection circuit 209 and outputs the voice modulation circuit 612. The output signal is time-axis compressed and output, and the recorded voice synchronization circuit 615 and the switch 61.
4 is a compression circuit 6 at the timing of forming an audio track.
The output signal of 13 is transmitted to the switches 617 and 618.
Further, since the switch 406 is brought into the connected state by the recording video synchronization circuit 616, the output signal of the video modulation circuit 405 is transmitted to the switches 617 and 618. The recording signal determination circuit 619 and the switch 617 transmit the signal from the video modulation circuit 405 to the recording head 601 at the timing when the recording head 601 scans the video track, and the recording head 60
The compression circuit 6 at the timing when 1 scans the audio track.
The signal from 13 is transmitted to the recording head 601. The recording signal determination circuit 619 and the switch 618 are provided in the recording head 602.
Transmits a signal from the video modulation circuit 405 to the recording head 602 at the timing of scanning the video track, and transmits a signal from the compression circuit 613 to the recording head 602 at the timing at which the recording head 602 scans the audio track. That is, the odd field of the video signal from the outside is recorded on the odd track 115, and the even field is recorded on the even track 116 to obtain the video signal S11. Also, one audio track (odd track 1
17 and even tracks 118) to obtain the audio signal S12. Further, since the erasing timing circuit 511 puts the switches 509 and 510 in the connected state, the erasing signal from the erasing circuit 503 causes the erasing heads 507 and 508.
The recording information on the video track is erased before the recording heads 401 and 402.

Next, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs an even field recording command, the switch 207 connects the output of the control head 203 to the capstan control circuit 206, and the switch Reference numeral 210 connects the output of the field discrimination circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 controls the control signal from the switch 207 and the field discrimination circuit 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 5 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the field discrimination circuit 205. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211,
The cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 20 from the switch 210.
By rotating the cylinder 208 at a constant speed while maintaining a constant phase relationship with the output signal of No. 5, the recording head 601 scans the odd track 115 in the odd field of the video signal from the outside, and records in the even field. The timing for scanning the even-numbered tracks 116 with the head 602 is obtained. On the other hand, the reproduced voice synchronizing circuit 608 and the switch 607
On the basis of the output signal (C2 signal) of the rotation phase detection circuit 209, transmits the signal of the audio track read from the tape 1 by the reproducing heads 603 and 604 to the expansion circuit 609, and the expansion circuit 609 transmits the input signal to the time axis. The expanded audio signal is expanded and output, and the audio demodulation circuit 610 demodulates the output signal of the expansion circuit 609 to reproduce the reproduced audio signal A1 of the first channel and the second audio signal.
The reproduced audio signal A2 of the channel is output. At this time, the reproduced audio signal A1 and the reproduced audio signal A2 are the same signal. The audio modulation circuit 612 modulates and synthesizes the reproduced audio signal A1 as the first channel and the external audio signal as the second channel, synthesizes and outputs the result. Compression circuit 61
3 outputs the output signal of the voice modulation circuit 612 in time-axis compression in synchronization with the C2 signal. The recording audio synchronizing circuit 615 and the switch 614 transmit the output signal of the compression circuit 613 to the switches 617 and 618 at the timing when the recording heads 601 and 602 form an audio track. Further, the recording video synchronizing circuit 616 and the switch 406 are provided for the recording head 6.
Switch 4 while 02 is scanning even track 116
06 is connected. The recording signal determination circuit 619 and the switch 617 transmit the signal from the compression circuit 613 to the recording head 601 at the timing when the recording head 601 scans the audio track. The recording signal determination circuit 619 and the switch 618 transmit the signal from the video modulation circuit 405 to the recording head 602 at the timing when the recording head 602 scans the video track, and the compression circuit at the timing when the recording head 602 scans the audio track. The signal from 613 is transmitted to the recording head 602. That is, only the even field of the video signal from the outside is recorded on the even track 116, and the supply of the video signal is cut off by the switch 406 during the odd field, so that the recording is not performed and the video signal S13 is obtained. In addition, the audio signal from the outside and the reproduced audio signal A1 are recorded on one audio track (odd track 117 and even track 118) as a time-axis-compressed two-channel signal, and an audio signal S14 is obtained. Further, the erase timing circuit 511 and the switch 50
9, 510, the erasing signal from the erasing circuit 503 is supplied to the erasing heads 507 and 508. Therefore, the recording information on the even-numbered tracks 116 and 118 is erased prior to the recording head 602, and the recording head 601 is preceded. The recorded information on the odd-numbered track 117 is erased.

Similarly, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs the odd field recording command, the odd field of the video signal from the outside is recorded on the odd track 115, and the external field is recorded. The audio signal is recorded as the first channel on the audio track (odd track 117, even track 118). At this time, the recording information on the odd-numbered tracks 115 and 117 is erased prior to the recording head 601, and the recording head 6
Prior to 02, the recorded information on the even-numbered track 118 is erased.

Next, in the tape 1 recorded by performing the even track recording operation after the above frame recording operation,
When the operation command circuit 11 outputs a reproduction command, the switch 2
Reference numeral 07 connects the output of the control head 203 to the capstan control circuit 206, switch 210 connects the output of the reference oscillator 204 to the capstan control circuit 206,
The capstan control circuit 206 controls the control signal from the switch 207 and the reference oscillator 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 4 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the reference oscillator 204. Further, the switch 210 connects the output signal of the reference oscillator 204 to the cylinder control circuit 211, and the cylinder control circuit 211 keeps the phase relationship between the output signal of the rotation phase detection circuit 209 and the output signal of the reference oscillator 204 from the switch 210 constant. By rotating the cylinder 208 at a constant speed while maintaining
5 is obtained, and the timing at which the reproducing head 604 scans the even track 116 is obtained. On the other hand, the reproduced voice synchronization circuit 6
08 and the switch 607 transmit the signal of the audio track read from the tape 1 by the reproducing heads 603 and 604 to the decompression circuit 609 based on the output signal (C2 signal) of the rotational phase detection circuit 209, and the decompression circuit 609 inputs the signal. The audio demodulation circuit 610 demodulates the output signal of the expansion circuit 609 and outputs the reproduced audio signal S16 (A1) of the first channel and the reproduced audio signal S18 (A2 of the second channel). ) Is output. Further, the reproduced video synchronizing circuit 606 and the switch 605 are arranged so that the reproduction heads 603 and 604 read the video odd-numbered track signal 115 and the even-numbered track 11 from the tape 1 based on the C2 signal.
And the signal of 6 are sequentially transmitted to the video demodulation circuit 403, and the video demodulation circuit 403 demodulates the input signal and outputs the video signal. The switch 410 alternately outputs the odd field of the video signal output from the video demodulation circuit 403 and the even field of the video signal output from the simple signal generation circuit 409.
The first reproduced video signal S15 (V1) is obtained. Switch 4
11 alternately outputs the even field of the video signal output from the video demodulation circuit 403 and the odd field of the video signal output from the simple signal generation circuit 409, so that the second reproduced video signal S17 (V2) is obtained.

As described above, in the second embodiment,
It is possible to record and reproduce independent 2-channel video signals on the odd-numbered tracks 115 and even-numbered tracks 116, and record and reproduce independent 2-channel audio signals on one audio track.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings.

FIG. 7 is a block diagram showing the structure of the recording / reproducing apparatus in the third embodiment.

In FIG. 7, the same parts as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted. VW1 and VW2 are attached so as to face the cylindrical side surface of the cylinder 208, and recording heads for forming odd-numbered tracks and even-numbered tracks of the video track of the tape 1 respectively, and VR1 and VR2 face the cylindrical side surface of the cylinder 208, respectively. The reproducing heads AW1 and AW2, which are attached and read the recording signals by scanning the odd-numbered tracks and the even-numbered tracks of the video track of the tape 1 ahead of the recording heads VW1 and VW2, respectively, face the cylindrical side surface of the cylinder 208. Recording heads AR1 and AR2 are cylinders of a cylinder 208 which are attached to form the odd tracks and the even tracks of the audio tracks of the tape 1, respectively, and which scan the same recording position prior to the recording heads VW1 and VW2, respectively. Attached to the sides facing each other, each tape 1 for audio Odd track click, even track recording head AW1, A
A reproducing head for scanning and reading a recording signal prior to W2, and 209 indicates which of the reproducing heads VR1 and VR2 scans the video track based on the rotation position signal and the rotation speed signal of the cylinder 208. A rotation phase detection circuit for generating and outputting a rotation phase signal (C2 signal), E
1 is a recording head AW after the reproducing heads AR1 and VR1
1, EW for erasing a recording signal by scanning odd tracks for video and audio before VW1
Is the recording head AW after the reproducing heads AR2 and VR2.
2, an erasing head for erasing recorded signals by scanning even tracks for video and audio before VW2, 50
Reference numerals 9 and 510 denote switches for connecting the output signals of the erasing circuit 503 to the erasing heads E1 and E2, respectively. Reference numeral 521 denotes switches 509 and 510 for connection when the output of the operation commanding circuit 11 is a frame recording command, and an odd field. When a recording command is issued, the switch 509 is connected at the timing when the erase head E1 scans an odd track, and when an even field recording command, the switch 510 is connected at a timing when the erase head E2 scans an even track. Circuit, 605 is a reproducing head VR1
Alternatively, a switch 621 connects or disconnects the output of VR2 to the video demodulation circuit 403, and 621 outputs the output signal of the switch 411 when the operation command circuit 11 is an odd field recording command, and the switch 41 when it is an even field recording command.
A switch which outputs an output signal of 0, 622 is a memory circuit which outputs the video signal of the output of the switch 621 by delaying for a predetermined time in synchronization with the C2 signal, and 623 is a video signal of the output of the memory circuit 622 and from the outside. Switch for switching the video signal of and outputting to the video modulation circuit 405, 6
Reference numeral 24 indicates, based on the C2 signal, when the output of the operation command circuit 11 is a frame recording command, it outputs a signal for selecting an external video signal to the switch 623, and when it is an odd field recording command, it outputs the external video signal. A signal for alternately selecting the odd field and the even field of the video signal output from the memory circuit 622 is output to the switch 623, and when the even field recording command is issued, the even field of the external video signal and the output of the memory circuit 622 are output. A signal for alternately selecting the odd field of the video signal is switched to the switch 623.
625 is a switch for outputting the output signal of the video modulation circuit 405 only when the output of the operation command circuit 11 is a frame recording command, an odd field recording command, or an even field recording command, and 626 is a switch 625. Output signal to print head VW1 or VW2
The switch 627 outputs the output signal of the switch 625 at the timing when the recording head VW1 scans an odd number of tracks based on the C2 signal.
A recording video synchronizing circuit 607 which outputs a signal for connecting to the switch 626 to the switch 626, and outputs a signal for connecting the output signal of the switch 625 to the switch 626 to the switch 626 at the timing when the recording head VW2 scans an even track.
Is a switch for switching and outputting the output signal of the reproducing head AR1 or AR2, and 610 demodulates the output signal of the switch 607 to output the reproduced audio signal A1 of the first channel and the reproduced audio signal A2 of the second channel. An audio demodulation circuit 628 outputs the reproduced audio signal A2 of the second channel of the output of the audio demodulation circuit 610 when the output of the operation command circuit 11 is an odd field recording command, and outputs a reproduced audio signal A2 of the second channel of the output of the audio demodulation circuit 610. A switch for outputting the reproduced audio signal A1 of the output first channel, 62
Reference numeral 9 denotes a memory circuit which outputs the audio signal output from the switch 628 by delaying it by a predetermined time in synchronization with the C2 signal,
When the output of the operation command circuit 11 is a frame recording command, 612 modulates and outputs an audio signal from the outside as the first and second channels, and when it is an odd field recording command (even field recording command), outputs from the outside. Memory signal 629 as the first (second) channel
An audio modulation circuit that modulates and synthesizes the audio signal of the output of the second channel as a second (first) channel and outputs the modulated signal. Reference numeral 630 indicates when the output of the operation command circuit 11 is a frame recording command, an odd field recording command, or an even field recording command. Only, a switch that outputs the output signal of the audio modulation circuit 405, and 631 that outputs the output signal of the switch 630 to the recording head A.
A switch for switching to W1 or AW2 for output, 63
2 outputs a signal connecting the output signal of the switch 630 to the recording head AW1 to the switch 631 at the timing when the recording head AW1 scans the odd-numbered tracks based on the C2 signal, and at the timing when the recording head AW2 scans the even-numbered tracks. The output signal of the switch 630 is used as the recording head AW.
2 is a recording voice synchronizing circuit for outputting a signal to be connected to the switch 631, and 53 is an erasing circuit 503 and erasing heads E1, E.
2, switches 509 and 510, and erase timing circuit 52
1 is an erasing means, 66 is a reproducing head VR1,
A video reproducing means composed of VR2, switches 410, 411 and 605, a video demodulating circuit 403, a simple video generating circuit 409 and a reproduced video synchronizing circuit 606, and 67 is a switch 6
07, reproduction voice synchronization circuit 608, reproduction heads AR1, A
A voice reproducing means constituted by R2 and a voice demodulation circuit 610, 68 is a switch 621, 623 and a memory circuit 62.
2, a synthesizing synchronization circuit 624 and a video modulating circuit 405, a video synthesizing unit 69, a voice synthesizing unit 69 including a switch 628, a memory circuit 629 and a voice modulating circuit 612, and 70 switches 625 and 626 and recording. A video recording means composed of the video synchronizing circuit 627, and 71 is an audio recording means composed of the switches 630 and 631 and the recording audio synchronizing circuit 632.

FIG. 8 is a recording track diagram in the third embodiment. 8, the same parts as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. 121 is the recording head VW1
An odd-numbered track for video formed by 122, an even-numbered track for video formed by the recording head VW2, 123 an odd-numbered track for audio formed by the recording head AW1, and 124 an audio formed by the recording head AW2. For even tracks.

FIG. 9 is a timing chart showing the relationship between the recording signal and the reproducing signal on the tape 1 in the third embodiment.

In FIG. 9, S19 is the operation command circuit 11
The video signal already recorded on the odd-numbered track 121 and the even-numbered track 122 according to the frame recording command of S.
23, audio signal already recorded on the even track 124, S2
Reference numeral 1 is a video signal in which the signal of the even field (even track 122) is rewritten into an external video signal by performing even field recording in accordance with the even field recording command of the operation command circuit 11, and S22 is an even field of the operation command circuit 11. By performing even field recording according to the recording command, the audio signal S20 is recorded as a first channel and the external audio signal is modulated and synthesized as the second channel, and S23 is recorded on the tape 1. The first reproduced video signal S24 is the first reproduction video signal created by setting the video of the odd-numbered track 121 of the video signal S21 as the odd field and the video corresponding to the black screen as the even field, and S24 is the tape 1
The first reproduced audio signal obtained by separating and demodulating the audio track signal of S1, S25 is the video signal S2 recorded on the tape 1.
The image of the even track 122 of 1 is set as an even field,
A second reproduction video signal created by using an image corresponding to a black screen as an odd field, and S26 is a second reproduction audio signal obtained by separating and demodulating the signal of the audio track of the tape 1.

The operation of the recording / reproducing apparatus of the third embodiment configured as described above will be described below in the operation command circuit 11.
The output (C1 signal) will be described.

First, when the operation command circuit 11 outputs a stop command, the capstan control circuit 206 makes the capstan 2
Since 01 is stopped, the transfer of the tape 1 is stopped. Since the scanning positions of the recording heads AW1, AW2, VW1 and VW2 do not move and the switches 625 and 630 are in the open state, the recording operation cannot be performed. Also, the reproducing head AR
Since the scanning positions of 1, AR2, VR1 and VR2 do not move, the reproducing operation becomes impossible.

Next, when the operation command circuit 11 outputs a frame recording command, the switch 207 connects the output of the field discrimination circuit 205 to the control head 203,
The switch 210 connects the output of the field discriminating circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 rotates the capstan 201 at a constant speed, so that the tape 1 is transferred at a constant speed and is also transferred to the control track 114. Control signals at regular intervals are recorded. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211, and the cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 205 from the switch 210.
While maintaining a constant phase relationship with the output signal of the cylinder 2
By rotating 08 at a constant speed, the timing for forming the odd track 121 with the recording head VW1 in the odd field of the video signal from the outside and the timing for forming the even track 122 with the recording head VW2 in the even field are obtained. On the other hand, the audio modulation circuit 612 modulates and synthesizes an external audio signal as the first and second channels and outputs it. The switch 630 outputs the output signal of the audio modulation circuit 612, and the recording audio synchronization circuit 632 and the switch. 631 transmits the output signal of the switch 630 to the recording head AW1 at the timing when the recording head AW1 scans the odd number track 123, and transmits the output signal of the switch 630 to the recording head AW2 at the timing when the recording head AW2 scans the even number track 124. To do. In other words, the audio signal from the outside is 2
A channel signal is recorded on one audio track (odd track 123, even track 124) to obtain an audio signal S20. Further, the synthesis synchronization circuit 624 causes the switch 623 to receive an external video signal from the video modulation circuit 40.
5, the video modulation circuit 405 modulates the video signal from the outside and outputs it. The switch 625 is the video modulation circuit 4
No. 05 output signal is output, and the recording video synchronizing circuit 627 and the switch 626 indicate that the recording head VW1 has an odd number of tracks 121.
The output signal of the switch 625 is transmitted to the recording head VW1 at the timing of scanning the, and the output signal of the switch 625 is transmitted to the recording head VW2 at the timing at which the recording head VW2 scans the even-numbered track 122. That is, the odd field of the video signal from the outside is recorded on the odd track 121, and the even field is recorded on the even track 122 to obtain the video signal S19. At this time, the recording head A
W1 and AW2 are operations for forming tracks ahead of the recording heads VW1 and VW2, respectively, and recording is similar to the high-fidelity audio recording system adopted in the tape recorder of the VHS standard (hereinafter abbreviated as VHS). It becomes a pattern. Further, since the erase timing circuit 521 puts the switches 509 and 510 in the connected state, the erase signal from the erase circuit 503 causes the erase heads E1 and E to be erased.
2 and the recording heads AW1, AV2, VW1, V
Prior to W2, the recorded information on the track is erased.

Next, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs an even field recording command, the switch 207 connects the output of the control head 203 to the capstan control circuit 206, and the switch Reference numeral 210 connects the output of the field discrimination circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 controls the control signal from the switch 207 and the field discrimination circuit 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 5 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the field discrimination circuit 205. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211,
The cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 20 from the switch 210.
By rotating the cylinder 208 at a constant speed while keeping a constant phase relationship with the output signal of No. 5, the recording head VW1 scans the odd number track 121 in the odd field of the video signal from the outside, and records in the even field. The timing for scanning the even-numbered tracks 122 with the head VW2 is obtained. On the other hand, the reproduced voice synchronizing circuit 608 and the switch 607
Is an odd track 123 signal and an even track 124 read from the tape 1 by the reproducing heads AR1 and AR2 based on the output signal (C2 signal) of the rotation phase detection circuit 209.
Signal is alternately transmitted to the audio demodulation circuit 610, and the audio demodulation circuit 610 demodulates the output signal of the switch 607 and outputs the reproduction audio signal A1 of the first channel and the reproduction audio signal A2 of the second channel. . At this time, the reproduced audio signal A1 and the reproduced audio signal A2 are the same signal. The switch 628 selects the reproduced audio signal A1 of the first channel output from the audio demodulation circuit 610 and transmits it to the memory circuit 629, and the memory circuit 629 makes the recording head AW1 or A1.
The reproduced audio signal A1 is delayed and output until W2 scans the recording position of the reproduced audio signal A1. Voice modulation circuit 612
Modulates, synthesizes and outputs the audio signal output from the memory circuit 629 as the first channel and the audio signal from the outside as the second channel. The switch 630 outputs the output signal of the audio modulation circuit 612, and the recording audio synchronization circuit 632 and the switch 631 transmit the output signal of the switch 630 to the recording head AW1 at the timing when the recording head AW1 scans the odd number track 123, and the recording head AW1. AW
The output signal of the switch 630 is transmitted to the recording head AW2 at the timing when 2 scans the even-numbered track 124. That is, the reproduced audio signal A1 and the audio signal from the outside are used as one audio track and one audio track (odd track 123, even track 124).
The audio signal S22 is obtained. In addition, the reproduced video synchronizing circuit 606 and the switch 605 are the rotation phase detecting circuit 20.
9 based on the output signal (C2 signal) of the reproducing head VR.
1, VR2 read from tape 1 odd track 12
The signal of 1 and the signal of the even track 122 are alternately transmitted to the video demodulation circuit 403.
The output signal of 05 is demodulated and a video signal is output. Since the switch 410 alternately outputs the odd field of the video signal output from the video demodulation circuit 403 and the even field of the video signal output from the simple signal generation circuit 409, the first reproduced video signal (V1) is obtained. Since the switch 411 alternately outputs the even field of the video signal output from the video demodulation circuit 403 and the odd field of the video signal output from the simple signal generation circuit 409, a second reproduced video signal (V2) is obtained. The switch 621 selects the first reproduction video signal output from the switch 410 and transmits it to the memory circuit 622. The memory circuit 622 performs the first reproduction until the recording head VW1 scans the recording position of the first reproduction video signal. Output the video signal with a delay. Synthetic synchronization circuit 624 and switch 623
Alternately outputs the odd field of the video signal output from the memory circuit 622 and the even field of the video signal from the outside to the video modulation circuit 405. The video modulation circuit 405 modulates and outputs the video signal output from the switch 623. The switch 625 outputs the output signal of the video modulation circuit 405, and the recording video synchronization circuit 627 and the switch 626 transmit the output signal of the switch 625 to the recording head VW1 at the timing when the recording head VW1 scans the odd number track 121, and the recording head VW1. The output signal of the switch 625 is applied to the recording head V at the timing when the VW2 scans the even-numbered track 122.
Transmit to W2. That is, the odd field of the first reproduced video signal (the video signal recorded on the odd track 121) is re-recorded on the odd track 121, and the even field of the video signal from the outside is recorded on the even track 122. Obtain S21. At this time, the recording head AW
1 and AW2 are operations for forming tracks ahead of the recording heads VW1 and VW2, respectively, and have recording patterns similar to the hi-fi audio recording system adopted in the tape recorder of the VHS standard. Further, by the erase timing circuit 521 and the switches 509 and 510,
The erase signal from the erase circuit 503 is the erase heads E1 and E2.
To the recording heads AW1, AV2, VW
1, the recorded information on the track is erased prior to VW2.

Similarly, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs an odd field recording command, the odd field of the video signal from the outside is recorded on the odd track 121, and the second field is recorded. The even field of the reproduced video signal (the video signal recorded on the even track 122) is re-recorded on the even track 122. Further, an audio signal from the outside is used as a first channel, and a reproduced audio signal A2 of the second channel output from the audio demodulation circuit 610 is used as a second channel on an audio track (odd tracks 117, even tracks 118). Will be recorded. At this time, the recording heads AW1, AV2, V
The recorded information on the track is erased prior to W1 and VW2.

Next, in the tape 1 recorded by performing the even track recording operation after the above frame recording operation,
When the operation command circuit 11 outputs a reproduction command, the switch 2
Reference numeral 07 connects the output of the control head 203 to the capstan control circuit 206, switch 210 connects the output of the reference oscillator 204 to the capstan control circuit 206,
The capstan control circuit 206 controls the control signal from the switch 207 and the reference oscillator 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 4 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the reference oscillator 204. Further, the switch 210 connects the output signal of the reference oscillator 204 to the cylinder control circuit 211, and the cylinder control circuit 211 keeps the phase relationship between the output signal of the rotation phase detection circuit 209 and the output signal of the reference oscillator 204 from the switch 210 constant. By rotating the cylinder 208 at a constant speed while maintaining
1 is obtained, and the timing at which the reproducing head VR2 scans the even track 122 is obtained. On the other hand, the reproduced voice synchronization circuit 6
08 and the switch 607, based on the output signal (C2 signal) of the rotational phase detection circuit 209, the reproducing heads AR1, AR
2 alternately outputs the signals of the odd-numbered tracks 123 and the signals of the even-numbered tracks 124 read from the tape 1 to the audio demodulation circuit 61.
0, and the audio demodulation circuit 610 demodulates the output signal of the switch 607 to reproduce the reproduced audio signal S of the first channel.
24 (A1) and reproduced audio signal S26 of the second channel
(A2) is output. Further, the reproduced video synchronizing circuit 606 and the switch 605, based on the output signal (C2 signal) of the rotation phase detection circuit 209, output the odd-numbered track 121 signal and the even-numbered track 122 signal read from the tape 1 by the reproducing heads VR1 and VR2. The signals are alternately transmitted to the video demodulation circuit 403, and the video demodulation circuit 403 demodulates the output signal of the switch 605 and outputs the video signal. Since the switch 410 alternately outputs the odd field of the video signal output from the video demodulation circuit 403 and the even field of the video signal output from the simple signal generation circuit 409, the first reproduced video signal S2.
3 (V1) is obtained. The switch 411 is the video demodulation circuit 40.
Since the even field of the video signal of 3 output and the odd field of the video signal of the simple signal generating circuit 409 are alternately output, the second reproduced video signal S25 (V2) is obtained.

As described above, in the third embodiment,
It is possible to record and reproduce independent 2-channel video signals on the odd-numbered tracks 121 and even-numbered tracks 122, and record and reproduce independent 2-channel audio signals on one audio track.

(Embodiment 4) A fourth embodiment of the present invention will be described below with reference to the drawings.

FIG. 10 is a block diagram showing the structure of the recording / reproducing apparatus in the fourth embodiment.

In FIG. 10, the same parts as those in FIG. 7 are designated by the same reference numerals and the description thereof will be omitted. VV1 and VV2 are attached to the cylindrical side surface of the cylinder 208 so as to face each other 180 degrees
Each of the recording heads AW1 and AW is formed by scanning or forming an odd-numbered track and an even-numbered track for video on the tape 1, respectively.
A video head for scanning the same recording position later than W2, and 209 indicates which of the video heads VV1 and VV2 is scanning the video track based on the rotation position signal and the rotation speed signal of the cylinder 208. A rotation phase detection circuit that creates and outputs a rotation phase signal (C2 signal),
701 is a video head VV1 or VV based on the C2 signal
A switch for switching and outputting the output of V2, 702 for a video demodulation circuit for demodulating the output signal of the switch 701 and outputting a video signal, and 703 for an output signal (C2 signal) of the rotational phase detection circuit 209 for a field switching synchronization signal. As a simple video generation circuit that outputs a video signal showing black in all sections,
A switch 704 outputs the output signal of the video demodulation circuit 702 when the output of the rotation phase detection circuit 209 indicates an odd track, and outputs the output signal of the simple video generation circuit 703 when it indicates an even track. A switch 705 outputs the output signal of the video demodulation circuit 702 when the output of the rotation phase detection circuit 209 indicates an even track, and outputs the output signal of the simple video generation circuit 703 when it indicates an odd track. Reference numeral 706 is a video modulation circuit that modulates and outputs a video signal from the outside, 707 is a switch that outputs or cuts off the output signal of the video modulation circuit 706,
Reference numeral 708 indicates that the switch 406 is always turned off when the output of the operation command circuit 11 is a reproduction command or a stop command based on the output signal (C2 signal) of the rotation phase detection circuit 209, and the output of the operation command circuit 11 is a frame recording. When the command is issued, the switch 707 is always connected, when the odd field recording command, the switch 707 is connected only during the period when the video head VV1 scans the odd number track, and when the even field recording command, the video head VV2.
Switch 70 only while scanning even tracks
A transmission control circuit for outputting a signal for connecting 7 to 70,
9 is a switch for switching and outputting the output signal of the switch 707 to the video head VV1 or VV2 based on the C2 signal, 710 is a switch for switching and outputting or shutting off the output signal of the reproducing head AR1 or AR2, and 711 is an operation command circuit 11 When the output is a stop command, a cutoff signal is output to the switch 710, and when the output is other than the stop command, the reproducing head AR1 which scans the audio track based on the output signal (C2 signal) of the rotation phase detection circuit 209 or AR2
A reproduction audio synchronizing circuit that outputs a signal for selecting the output signal of the switch 710 to the switch 710, and a demodulation circuit 712 demodulates the output signal of the switch 710 and outputs a reproduction audio signal of the first channel and a reproduction audio signal of the second channel. Voice demodulation circuit, 7
Reference numeral 13 denotes an audio demodulation circuit which demodulates and outputs the compressed and recorded first channel signal of the output of the reproducing head AR1, and 716 a second compressed and recorded channel of the output of the reproducing head AR2. , 714, 717 are expansion circuits for expanding the output signals of the audio demodulation circuits 713, 716 on the time axis to output reproduced audio signals, and 715 is an output of the reproduction head AR1. A recording state detection circuit for detecting whether the signal of the first channel is normal recording or compressed recording, 718 is a reproducing head A
A recording state detection circuit for detecting whether the signal of the second channel of the output of R2 is normal recording or compressed recording, and 719 is a first state of the audio demodulation circuit 712 when the output of the recording state detection circuit 715 indicates normal recording. When the reproduced audio signal of channel 1 is output and compression recording is indicated, the decompression circuit 7
A switch for outputting the reproduced audio signal of the output of 14; 720
When the output of the recording state detection circuit 718 indicates normal recording, the reproduced audio signal of the second channel of the audio demodulation circuit 712 is output, and when it indicates compressed recording, the reproduced audio output of the expansion circuit 717 is output. Switch that outputs a signal, 7
21 outputs a reproduced audio signal of the output of the switch 720 when the output of the operation command circuit is an odd field recording command,
When an even field recording command, a switch for outputting a reproduced audio signal output from the switch 719, a memory circuit 722 for outputting an audio signal output from the switch 721 by delaying a predetermined time in synchronization with the C2 signal, and a reference numeral 723. C2
In synchronization with the signal, a compression circuit that outputs an output signal of two fields of an audio signal from the outside by time-axis compression to one field or less, and outputs 724. When the output of the operation command circuit 11 is a reproduction command or a stop command, When signal output is stopped and a frame recording command is issued, an audio signal from the outside is modulated and output, and when an odd field recording command (even field recording command), the output signal of the compression circuit 723 is set to the first (second)
, A voice modulation circuit that modulates and synthesizes the output signal of the memory circuit 722 as a second (first) channel, and outputs it. 725 is a switch that outputs or blocks the output signal of the voice modulation circuit 724; and 726 is C2. Based on the signal, when the output of the operation command circuit 11 is a reproduction command or a stop command, the switch 725 is always turned off,
When the output of the operation command circuit 11 is a frame recording command, the switch 725 is always in the connection state, and when the output is an odd field recording command, the switch 725 is in the connection state only during a period in which the recording head AW1 scans an odd number track, and an even number. When a field recording command is issued, a transmission control circuit which outputs a signal for connecting the switch 725 to the connection state only during a period when the recording head AW2 is scanning an even number track, and 727 outputs the signal output from the switch 725 to the recording head AW1 or AW2.
The switch 728 outputs the output signal of the switch 725 at a timing at which the recording head AW1 scans an odd number of tracks based on the C2 signal.
A recording voice synchronizing circuit which outputs a signal for connecting to 1 and outputs a signal for connecting the output signal of the switch 725 to the recording head AW2 at the timing when the recording head AW2 scans an even number track. Video demodulation circuit 702 and simple video generation circuit 703
And a video modulation circuit 70.
6 and switches 707 and 709, and a transfer control circuit 708, a video recording means 74, and switches 710 and 71.
9, 720, reproduced voice synchronization circuit 711, and voice demodulation circuit 7
12, 713, 716, decompression circuits 714, 717 and recording state detection circuits 715, 718, and sound reproducing means, and 75 comprises a switch 721, a memory circuit 722, a compression circuit 723, and a sound modulation circuit 724. The voice synthesizing unit 76 is a voice recording unit including switches 725, 727, a transmission control circuit 726, and a recording voice synchronizing circuit 728.

FIG. 11 is a recording track diagram in the fourth embodiment. 11, the same parts as those in FIG. 8 are designated by the same reference numerals and the description thereof will be omitted. 131 is a video head V
An odd track for video, formed by V1, 132
Is an even track for video formed by the video head VV2, 133 is an odd track for audio formed by the recording head AW1, and 134 is an even track for audio formed by the recording head AW2.

FIG. 12 shows a tape 1 according to the fourth embodiment.
FIG. 6 is a timing diagram showing the relationship between the above recorded signal and reproduced signal.

In FIG. 12, S27 is the operation command circuit 1
The video signal recorded on the odd-numbered track 131 and the even-numbered track 132 according to the frame recording command 1 is S28. The audio signal is recorded on the odd-numbered track 133 and the even-numbered track 134 according to the frame recording command of the operation command circuit 11.
Reference numeral 29 denotes a video signal in which the even field (even track 132) signal is rewritten into an external video signal by performing even field recording by the even field recording command of the operation command circuit 11, and S30 is an even field of the operation command circuit 11. By performing even field recording in accordance with the recording command, the audio signal S28 is used as the first channel, the compressed signal of the external audio signal is modulated and synthesized as the second channel, and the audio signal is recorded only on the even track 134. S31 is the video signal S recorded on the tape 1.
The first reproduction video signal created by using the video of 29 odd tracks 131 as the odd field and the video corresponding to the black screen as the even field, and S32 is the first reproduction in which the signal of the audio track of the tape 1 is separated and demodulated. The audio signal, S33, is a second image in which the image on the even track 132 of the image signal S29 recorded on the tape 1 is an even field and the image corresponding to a black screen is an odd field.
Is a second reproduced audio signal obtained by separating, demodulating, and expanding the time axis of the signal of the even track 134 for audio of the tape 1.

The operation of the recording / reproducing apparatus according to the fourth embodiment having the above-described structure will be described below.
The output (C1 signal) will be described.

First, when the operation command circuit 11 outputs a stop command, the capstan control circuit 206 causes the capstan 2
Since 01 is stopped, the transfer of the tape 1 is stopped. Recording heads AW1 and AW2 and video heads VV1 and VV
The scanning position of 2 does not move and the switches 707 and 725 are in the open state, so that the recording operation cannot be performed. Further, since the scanning positions of the reproducing heads AR1 and AR2 do not move,
The reproduction operation becomes impossible.

Next, when the operation command circuit 11 outputs a frame recording command, the switch 207 connects the output of the field discrimination circuit 205 to the control head 203,
The switch 210 connects the output of the field discriminating circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 rotates the capstan 201 at a constant speed, so that the tape 1 is transferred at a constant speed and is also transferred to the control track 114. Control signals at regular intervals are recorded. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211, and the cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 205 from the switch 210.
While maintaining a constant phase relationship with the output signal of the cylinder 2
By rotating 08 at a constant speed, the timing for forming the odd track 121 with the video head VV1 in the odd field of the video signal from the outside and the even track 122 with the video head VV2 in the even field is obtained. On the other hand, the audio modulation circuit 724 modulates and synthesizes an external audio signal as the first and second channels, outputs the modulated signal, and the transmission control circuit 726 and the switch 725 switch the recording head AW1 at the timing of scanning the odd number track 133. The output signal of the switch 725 is transmitted to the recording head AW1 at the timing when the recording head AW2 scans the even-numbered track 134.
Transmit to W2. That is, an audio signal from the outside is recorded as a signal of two channels on one audio track (odd track 133, even track 134), and an audio signal S28 is obtained. The video modulation circuit 706 also modulates and outputs a video signal from the outside. The transmission control circuit 708 and the switch 707 indicate that the video head VV1 has an odd number of tracks 131.
The output signal of the switch 707 is transmitted to the video head VV1 at the timing of scanning, and the output signal of the switch 707 is transmitted to the video head VV2 at the timing at which the video head VV2 scans the even track 132. That is, the odd field of the video signal from the outside is recorded on the odd track 131 and the even field is recorded on the even track 132, and the video signal S27 is obtained. At this time, the recording head A
W1 and AW2 are operations for forming tracks ahead of the video heads VV1 and VV2, respectively, and have a recording pattern similar to the hi-fi audio recording system adopted in the tape recorder of the VHS standard. Further, since the erasing timing circuit 522 puts the switches 509 and 510 in the connected state, the erasing signal from the erasing circuit 503 is supplied to the erasing heads E1 and E2, and precedes the recording heads AW1 and AV2 and the video heads VV1 and VV2. The recorded information on the track is erased.

Next, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs an even field recording command, the switch 207 connects the output of the control head 203 to the capstan control circuit 206, and the switch Reference numeral 210 connects the output of the field discrimination circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 controls the control signal from the switch 207 and the field discrimination circuit 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 5 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the field discrimination circuit 205. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211,
The cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 20 from the switch 210.
By rotating the cylinder 208 at a constant speed while maintaining a constant phase relationship with the output signal of No. 5, the video head VV1 scans the odd track 131 in the odd field of the video signal from the outside, and the video in the even field. The timing for scanning the even-numbered tracks 132 with the head VV2 is obtained. On the other hand, the reproduced voice synchronizing circuit 711 and the switch 710.
Is based on the output signal (C2 signal) of the rotational phase detection circuit 209, the signals of the odd tracks 133 and the even tracks 134 read from the tape 1 by the reproducing heads AR1 and AR2.
Signal is alternately transmitted to the audio demodulation circuit 712, and the audio demodulation circuit 712 demodulates the output signal of the switch 710 and outputs the reproduction audio signal of the first channel and the reproduction audio signal of the second channel. At this time, the first and second reproduced audio signals are the same signal. Since the output of the recording state detection circuit 715 indicates normal recording, the switch 719 outputs the first reproduced audio signal of the output of the audio demodulation circuit 712. Since the output of the recording state detection circuit 718 indicates normal recording, the switch 720 outputs the reproduced audio signal of the second output of the audio demodulation circuit 712. The switch 721 outputs the output signal of the switch 719, and the memory circuit 722 outputs the recording head A.
The reproduced audio signal output from the switch 721 is delayed and output until W2 scans the recording position of the reproduced audio signal. The audio modulation circuit 724 outputs the output signal of the memory circuit 722 as a first signal.
As the second channel, the output signal of the compression circuit 723 obtained by time-compressing the audio signal from the outside is modulated, synthesized, and output as the second channel. The transmission control circuit 726 and the switch 725 indicate that the recording head AW2 has an even track 13
The output signal of the audio modulation circuit 724 is transmitted to the switch 727 only at the timing of scanning 4 and the recording audio synchronization circuit 7
28 and the switch 727 transmit the output signal of the switch 725 to the recording head AW1 at the timing when the recording head AW1 scans the odd-numbered track 133, and the switch 7 at the timing when the recording head AW2 scans the even-numbered track 134.
The output signal of 25 is transmitted to the recording head AW2. That is, the reproduced audio signal output from the switch 719 and the compressed audio signal from the outside are recorded on the even track 134 for audio as the signals of the first and second channels, respectively, and the audio signal S30 is obtained. In addition, the video modulation circuit 706
Modulates and outputs a video signal from the outside. The transmission control circuit 708 and the switch 707 transmit the output signal of the video modulation circuit 706 to the switch 709 only at the timing when the video head VV2 scans the even track 132, and the switch 709 at the timing when the video head VV1 scans the odd track 131. The output signal of the switch 707 is transmitted to the video head VV1 so that the video head VV2 receives an even track 1
The output signal of the switch 707 is transmitted to the video head VV2 at the timing of scanning 32. That is, the even field of the video signal from the outside is recorded only on the even track 132, and the video signal S29 is obtained. At this time, the recording heads AW1 and AW2 operate to form tracks ahead of the video heads VV1 and VV2, respectively, and have a recording pattern similar to the high-fidelity audio recording system adopted in the VHS standard tape recorder. Further, by the erase timing circuit 522 and the switches 509 and 510,
Since the erasing signal from the erasing circuit 503 is supplied only to the erasing head E2, the video head VV2 and the recording head A2.
Prior to W2, only the record information on the even-numbered tracks 132 and 134 is erased.

Similarly, in the tape 1 recorded by the frame recording operation described above, when the operation command circuit 11 outputs an odd field recording command, the odd field of the video signal from the outside is recorded only on the odd track 131. Also, the compressed audio signal from the outside is recorded as the first channel, and the reproduced audio signal output from the switch 720 is recorded as the second channel on the odd-numbered track 133 for audio. At this time, only the recording information on the odd-numbered tracks 131 and 133 is erased prior to the recording video head VV1 and the head AW1.

Next, in the tape 1 recorded by performing the even track recording operation after the above frame recording operation,
When the operation command circuit 11 outputs a reproduction command, the switch 2
Reference numeral 07 connects the output of the control head 203 to the capstan control circuit 206, switch 210 connects the output of the reference oscillator 204 to the capstan control circuit 206,
The capstan control circuit 206 controls the control signal from the switch 207 and the reference oscillator 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 4 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the reference oscillator 204. Further, the switch 210 connects the output signal of the reference oscillator 204 to the cylinder control circuit 211, and the cylinder control circuit 211 keeps the phase relationship between the output signal of the rotation phase detection circuit 209 and the output signal of the reference oscillator 204 from the switch 210 constant. By rotating the cylinder 208 at a constant speed while maintaining
1 is obtained, and the timing for scanning the even track 132 by the video head VV2 is obtained. On the other hand, the reproduced voice synchronization circuit 7
11 and the switch 710, based on the output signal (C2 signal) of the rotational phase detection circuit 209, the reproducing heads AR1, AR.
2 alternates the signals of the odd-numbered tracks 133 and the signals of the even-numbered tracks 134 read from the tape 1 into the audio demodulation circuit 71.
Then, the audio demodulation circuit 712 demodulates the output signal of the switch 710 and outputs the reproduced audio signal of the first channel and the reproduced audio signal of the second channel. further,
The audio demodulation circuit 713 demodulates and outputs the compressed and recorded first channel signal of the output signal of the reproducing head AR1, and the expansion circuit 714 expands the output signal of the audio demodulation circuit 713 on the time axis and reproduces it. Output an audio signal. The audio demodulation circuit 716 demodulates and outputs the compressed and recorded second channel signal of the output signal of the reproducing head AR2, and the expansion circuit 717 expands the output signal of the audio demodulation circuit 716 on the time axis and reproduces it. Output an audio signal. In this case, since the output of the recording state detection circuit 715 indicates normal recording, the switch 719 converts the first reproduced audio signal output from the audio demodulation circuit 712 into the reproduced audio signal S32 (A) of the first channel.
Output as 1). Further, the recording state detection circuit 718
The switch 720 outputs the reproduced audio signal of the output of the expansion circuit 717 as the reproduced audio signal S34 (A2) of the second channel, since the output of 1 indicates compressed recording. Also, the switch 701 outputs the output signal (C2
Signal), the video heads VV1 and VV2 alternately transmit the signals of the odd track 131 and the signal of the even track 132 read from the tape 1 to the video demodulation circuit 702, and the video demodulation circuit 702 outputs the output signal of the switch 701. It demodulates and outputs a video signal. Since the switch 704 alternately outputs the odd field of the video signal output from the video demodulation circuit 702 and the even field of the video signal output from the simple signal generation circuit 703, the first reproduced video signal S31.
(V1) is obtained. The switch 705 is a video demodulation circuit 702.
Since the even field of the output video signal and the odd field of the output video signal of the simple signal generation circuit 703 are alternately output, the second reproduced video signal S33 (V2) is obtained.

As described above, in the fourth embodiment,
It is possible to record and reproduce independent two-channel video signals on the odd-numbered track 131 and the even-numbered track 132, and record and reproduce independent two-channel audio signals on one audio track.

(Fifth Embodiment) A fifth embodiment of the present invention will be described below with reference to the drawings.

FIG. 13 is a block diagram showing the structure of the recording / reproducing apparatus in the fifth embodiment.

In FIG. 13, those parts which are the same as those corresponding parts in FIG. 7 are designated by the same reference numerals, and a description thereof will be omitted. VW1 and VW2 are attached so as to face the cylindrical side surface of the cylinder 208, and recording heads for forming odd and even tracks of the video track of the tape 1, VR1 and VR2 face the cylindrical side surface of the cylinder 208, respectively. Reproduction heads AW1 and AW2 for reading the recording signal by scanning the odd-numbered tracks and even-numbered tracks of the video track of the tape 1 ahead of the recording heads VW1 and VW2 by 2 × m (m is a natural number) fields. Are attached so as to face the cylindrical side surface of the cylinder 208, and form odd tracks and even tracks of the audio track of the tape 1, respectively.
Recording heads AR1 and AR2 for scanning the same recording position prior to the recording heads VW1 and VW2, respectively.
Is attached so as to face the cylindrical side surface of the cylinder 208,
Each of the audio tracks of the tape 1 has an odd-numbered track and an even-numbered track of 2 × n (n
Is a natural number) A reproducing head for scanning and reading a recording signal in advance by a field, 623 is a switch for switching the video signal output from the switch 621 and a video signal from the outside and outputting to the video modulation circuit 405, and 624 is a C2 signal. Based on the above, when the output of the operation command circuit 11 is the frame recording command, the signal for selecting the video signal from the outside is switched to the switch 6
23 to output an odd field recording command, a signal for alternately selecting the odd field of the video signal from the outside and the even field of the video signal output from the switch 621 is output to the switch 623, and the even field recording command is output. At this time, the even field of the video signal from the outside and the switch 6
A composite synchronizing circuit for outputting to the switch 623 a signal for alternately selecting an odd field of the video signal of the output of 21;
When the output of the operation command circuit 11 is a frame recording command, numeral 12 modulates and outputs an audio signal from the outside as the first and second channels, and when it is an odd field recording command (even field recording command), externally Is used as a first (second) channel, and the audio signal output from the switch 628 is modulated and synthesized as a second (first) channel, and is output. Reference numeral 77 is a switch 62.
1, 623, a composite synchronization circuit 624, and a video modulation circuit 405.
The video synthesizing unit 78 is a voice synthesizing unit composed of a switch 628 and a voice modulating circuit 612.

FIG. 14 is a recording track diagram in the fifth embodiment. In FIG. 14, 1 is a tape having a surface coated with a magnetic material and serving as a recording medium, 114 is a control track formed by the control head 203, and T1, T3, T5, and T7 are recording heads VW1 and A.
W1 or reproducing heads VR1, AR1 sequentially scan the odd-numbered tracks, T2, T4, T6 are recording heads VW2, A
W2 or reproducing heads VR2 and AR2 sequentially scan even tracks.

FIG. 15 is a head layout diagram showing the relationship between the cylinder 208 and the head group in the fifth embodiment.

Further, FIG. 9 is a timing chart showing the relationship between the recording signal and the reproducing signal on the tape 1 in the fifth embodiment.

Since FIG. 9 is the same as the third embodiment,
The description of the reference numerals is omitted. The operation of the recording / reproducing apparatus of the fifth embodiment configured as described above will be described below according to the output (C1 signal) of the operation command circuit 11.

First, when the operation command circuit 11 outputs a stop command, the capstan control circuit 206 causes the capstan 2
Since 01 is stopped, the transfer of the tape 1 is stopped. Since the scanning positions of the recording heads AW1, AW2, VW1 and VW2 do not move and the switches 625 and 630 are in the open state, the recording operation cannot be performed. Also, the reproducing head AR
Since the scanning positions of 1, AR2, VR1 and VR2 do not move, the reproducing operation becomes impossible.

Next, when the operation command circuit 11 outputs a frame recording command, the switch 207 connects the output of the field discrimination circuit 205 to the control head 203,
The switch 210 connects the output of the field discriminating circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 rotates the capstan 201 at a constant speed, so that the tape 1 is transferred at a constant speed and is also transferred to the control track 114. Control signals at regular intervals are recorded. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211, and the cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 205 from the switch 210.
While maintaining a constant phase relationship with the output signal of the cylinder 2
By rotating 08 at a constant speed, odd-numbered tracks T1, T3, T5, T7 are formed by the recording head VW1 when the video signal from the outside is in the odd-numbered field, and even-numbered tracks T2, T4 by the recording head VW2 in the even-numbered field. , T
Get the timing to form 6. On the other hand, the voice modulation circuit 6
Reference numeral 12 modulates and synthesizes an audio signal from the outside as the first and second channels and outputs it. The switch 630 outputs the output signal of the audio modulation circuit 612, and the recording audio synchronization circuit 6
32 and the switch 631 transmit the output signal of the switch 630 to the recording head AW1 at the timing when the recording head AW1 scans the odd-numbered tracks T1, T3, T5, T7, and the recording head AW2 scans the even-numbered tracks T2, T4, T6. The output signal of the switch 630 is transmitted to the recording head AW2 at the timing. In other words, the audio signal from the outside is 2
One audio track as a channel signal (odd tracks T1, T3, T5, T7, even tracks T2, T
4, T6), and an audio signal S20 is obtained. Also,
The switch 623 transmits the video signal from the outside to the video modulation circuit 405 by the synthesizing and synchronizing circuit 624, and the video modulation circuit 405 modulates and outputs the video signal from the outside. The switch 625 outputs the output signal of the video modulation circuit 405,
The recording video synchronization circuit 627 and the switch 626 transmit the output signal of the switch 625 to the recording head VW1 at the timing when the recording head VW1 scans the odd-numbered tracks T1, T3, T5, T7, and the recording head VW2 outputs the even number track T.
Switch 625 at the timing of scanning 2, T4 and T6
Is transmitted to the recording head VW2. That is, the odd field of the video signal from the outside is the odd track T
1, T3, T5, T7, even fields are recorded on even tracks T2, T4, T6, and video signal S1
Get 9. At this time, the recording heads AW1 and AW2 operate to form tracks ahead of the recording heads VW1 and VW2, respectively, and have a recording pattern similar to the high-fidelity audio recording system adopted in the VHS standard tape recorder. Further, since the erasing timing circuit 521 puts the switches 509 and 510 in the connected state, the erasing signal from the erasing circuit 503 causes the erasing heads E1 and E2.
To the recording heads AW1, AV2, VW1, VW
Prior to 2, the recorded information on the track is erased.

Next, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs an even field recording command, the switch 207 connects the output of the control head 203 to the capstan control circuit 206, and the switch Reference numeral 210 connects the output of the field discrimination circuit 205 to the capstan control circuit 206, and the capstan control circuit 206 controls the control signal from the switch 207 and the field discrimination circuit 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 5 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the field discrimination circuit 205. Further, the switch 210 connects the output of the field discrimination circuit 205 to the cylinder control circuit 211,
The cylinder control circuit 211 outputs the output signal of the rotation phase detection circuit 209 and the field discrimination circuit 20 from the switch 210.
By rotating the cylinder 208 at a constant speed while maintaining a constant phase relationship with the output signal of No. 5, the recording head VW1 scans the odd tracks T1, T3, T5, T7 when the video signal from the outside is an odd field. , In the even field, the recording head VW2 makes the even tracks T2, T4,
Get the timing to scan T6. On the other hand, the reproduced voice synchronization circuit 608 and the switch 607 are connected to the rotation phase detection circuit 209.
Based on the output signal (C2 signal) of the reproducing head AR
Odd track T read from tape 1 by AR1
1, T3, T5, T7 signals and even tracks T2, T
The signals of T4 and T6 are alternately transmitted to the audio demodulation circuit 610,
The audio demodulation circuit 610 demodulates the output signal of the switch 607 and outputs the reproduced audio signal A1 of the first channel and the reproduced audio signal A2 of the second channel. At this time, the reproduced audio signal A1 and the reproduced audio signal A2 are the same signal.
The switch 628 selects the reproduction audio signal A1 of the first channel output from the audio demodulation circuit 610 to select the audio modulation circuit 6
12, the audio modulation circuit 612 modulates and synthesizes the audio signal output from the switch 628 as the first channel and the external audio signal as the second channel, and outputs the modulated and synthesized signal. The switch 630 outputs the output signal of the audio modulation circuit 612, and the recording audio synchronization circuit 632 and the switch 63.
1 indicates that the recording head AW1 has odd tracks T1, T3, T
The output signal of the switch 630 is transmitted to the recording head AW1 at the timing of scanning 5, 5 and T7, and the output signal of the switch 630 is transmitted to the recording head AW2 at the timing of the recording head AW2 scanning the even-numbered tracks T2, T4, T6. At this time, the recording head AW1 and the reproducing head AR1 are arranged as shown in FIG. 15, so that the reproducing head AR1 in FIG. 14 has four fields (a field which is a multiple of 2) of the recording head AW1 which scans the odd track T1. Since the previous odd track T5 is scanned almost at the same time,
Assuming that the signal processing time can be ignored, the reproducing head AR
The audio signal reproduced by the recording head AW1
The operation will be recorded in. In other words, the reproduced audio signal A1 and the external audio signal are used as one audio track (odd track T) as signals of the first and second channels, respectively.
1, T3, T5, T7, even tracks T2, T4, T
6), and an audio signal S22 is obtained. Further, the reproduced video synchronizing circuit 606 and the switch 605 are based on the output signal (C2 signal) of the rotational phase detection circuit 209 and the signals of the odd tracks T1, T3, T5 and T7 read from the tape 1 by the reproducing heads VR1 and VR2. Even tracks T2, T
The signals of T4 and T6 are alternately transmitted to the video demodulation circuit 403,
The video demodulation circuit 403 demodulates the output signal of the switch 605 and outputs the video signal of the field synchronized with the output of the field determination circuit 205 (the field of the video signal from the outside). The switch 410 is used for the odd field of the video signal output from the video demodulation circuit 403 and the simple signal generation circuit 40.
The first reproduced video signal (V1) is obtained because the even field of the video signal of 9 output is alternately output. Since the switch 411 alternately outputs the even field of the video signal output from the video demodulation circuit 403 and the odd field of the video signal output from the simple signal generation circuit 409, a second reproduced video signal (V2) is obtained. Switch 621 is switch 4
Select the first reproduced video signal of the output of 10 and switch 6
23, and the composite synchronizing circuit 624 and the switch 623 alternately output the odd field of the video signal output from the switch 623 and the even field of the video signal from the outside to the video modulation circuit 405. The video modulation circuit 405 modulates and outputs the video signal output from the switch 623. The switch 625 outputs the output signal of the video modulation circuit 405, and the recording video synchronization circuit 627 and the switch 626 output the recording head VW.
1 outputs the output signal of the switch 625 to the recording head VW at the timing of scanning the odd-numbered tracks T1, T3, T5, T7.
1 and the recording head VW2 moves to the even tracks T2, T
4, the output signal of the switch 625 is transmitted to the recording head VW2 at the timing of scanning T6. At this time, the recording head VW1 and the reproducing head VR1 are arranged as shown in FIG. 15, so that the reproducing head VR1 in FIG. 14 has four fields (a field that is a multiple of 2) of the recording head VW1 that scans the odd track T1. Previous odd track T
Since 5 is scanned almost at the same time, if the signal processing time can be ignored, the video signal reproduced by the reproducing head VR1 is recorded by the recording head VW1 simultaneously with the reproduction. That is, the odd field (video signal recorded on the odd track T5) of the first reproduced video signal (V1) is re-recorded on the odd track (T1), and the even field of the video signal from the outside is even track T2. It is recorded at T4 and T6, and a video signal S21 is obtained. Also, FIG. 14 and FIG.
As shown in FIG. 5, the recording heads AW1 and AW2 operate to form tracks ahead of the recording heads VW1 and VW2, respectively, and have a recording pattern similar to the hi-fi audio recording method adopted in the VHS standard tape recorder. . Further, since the erasing signal from the erasing circuit 503 is supplied to the erasing heads E1 and E2 by the erasing timing circuit 521 and the switches 509 and 510, the recording information of the track precedes the recording heads AW1, AV2, VW1 and VW2. Erased.

Similarly, in the tape 1 recorded by the above frame recording operation, when the operation command circuit 11 outputs an odd field recording command, the odd field of the video signal from the outside is recorded on the odd tracks T1, T3, T5, T7. The recorded and even field of the second reproduced video signal (the video signal recorded on the even track T6) is re-recorded on the even track (T2). Also, an audio signal from the outside is recorded on the audio track as the first channel, and the reproduced audio signal A2 of the second channel output from the audio demodulation circuit 610 is recorded as the second channel. At this time, the recording information on the track is erased prior to the recording heads AW1, AV2, VW1, VW2.

Next, in the tape 1 recorded by performing the even track recording operation after the above frame recording operation,
When the operation command circuit 11 outputs a reproduction command, the switch 2
Reference numeral 07 connects the output of the control head 203 to the capstan control circuit 206, switch 210 connects the output of the reference oscillator 204 to the capstan control circuit 206,
The capstan control circuit 206 controls the control signal from the switch 207 and the reference oscillator 20 from the switch 210.
Since the capstan 201 is rotated at a constant speed while keeping the phase relationship with the output signal of No. 4 constant, the tape 1 is transferred at a constant speed in synchronization with the output signal of the reference oscillator 204. Further, the switch 210 connects the output signal of the reference oscillator 204 to the cylinder control circuit 211, and the cylinder control circuit 211 keeps the phase relationship between the output signal of the rotation phase detection circuit 209 and the output signal of the reference oscillator 204 from the switch 210 constant. By rotating the cylinder 208 at a constant speed while keeping the same,
1, T3, T5, T7 are scanned, and the timing for scanning the even tracks T2, T4, T6 by the reproducing head VR2 is obtained. On the other hand, the reproduced voice synchronizing circuit 608 and the switch 607 are based on the output signal (C2 signal) of the rotational phase detecting circuit 209 and the signals of the odd tracks T1, T3, T5, T7 read from the tape 1 by the reproducing heads AR1, AR2. The signals of the even-numbered tracks T2, T4, T6 are alternately transmitted to the audio demodulation circuit 610, and the audio demodulation circuit 610 switches to the switch 607.
Of the first channel reproduced audio signal S24 (A1) and the second channel reproduced audio signal S
26 (A2) is output. In addition, the playback video synchronization circuit 60
6 and the switch 605, based on the output signal (C2 signal) of the rotational phase detection circuit 209, the reproducing heads VR1 and VR2.
Read from tape 1 on odd tracks T1, T3, T
The signals of T5, T7 and the signals of even tracks T2, T4, T6 are alternately transmitted to the video demodulation circuit 403, and the video demodulation circuit 4
03 demodulates the output signal of the switch 605 and outputs a video signal. The switch 410 is used for the odd field of the video signal output from the video demodulation circuit 403 and the simple signal generation circuit 409.
The first reproduced video signal S23 (V1) is obtained because the even field of the output video signal is output alternately. Since the switch 411 alternately outputs the even field of the video signal output from the video demodulation circuit 403 and the odd field of the video signal output from the simple signal generation circuit 409, the second reproduced video signal S25 (V2) is obtained.

As described above, in the fifth embodiment,
In addition to recording and reproducing independent 2-channel video signals on the odd-numbered tracks T1, T3, T5, T7 and the even-numbered tracks T2, T4, T6, without using the storage means for the reproduced audio or video or the time base compression means, It becomes possible to record and reproduce independent two-channel audio signals on one audio track.

In the fifth embodiment, the reproducing head V
R1 and VR2 are 2 × m from the recording heads VW1 and VW2
(M is a natural number) scanning is performed ahead of the field, and the reproducing heads AR1 and AR2 are 2 × the recording heads AW1 and AW2.
It has been stated that scanning is performed in advance of n (n is a natural number) fields, but if the transmission time for re-recording the reproduction signal cannot be ignored, the reproduction heads VR1, VR2, AR1, AR2 are used.
By adjusting the mounting position of, the recording position at the time of re-recording can be matched with the recorded track.

As an example of the voice synthesizing means in each of the above-described embodiments, one of the voice signals obtained by previously reproducing the recorded two-channel voice signal and the voice signal from the outside are recorded as two channels. Although shown, it is conceivable to combine the reproduced audio signals of the two channels on the time axis to form one channel instead of selecting one of the reproduced audio signals of the two channels. Absent.

Further, as a specific example of recording / reproducing two-channel audio on a single track in each of the above-described embodiments, there is a method of changing the carrier frequency of frequency modulation to perform frequency separation, or digitizing audio to obtain two types of audio. It is possible to treat it as mixed data of.

Further, as the video reproducing means in each of the above-described embodiments, a video signal in which the video signal reproduced from the recording signal on the tape 1 and the video signal output from the simple video generation circuit 409 or 703 are switched for each field is output. However, even if one frame is formed by outputting the signal of the same odd-numbered track (even-numbered track) for video on the tape 1 twice by direct driving of the image memory or head, the same effect is obtained. Is obtained and is not limited to the embodiment.

Further, as the recording medium transfer means in each of the above-mentioned embodiments, the recording position of the image track was obtained by recording and reproducing the control signal on the tape 1, and the scanning position of the head was controlled. Even if the recording information of the audio or audio track is recorded and reproduced by including the recording position information, the same effect can be obtained, and the present invention is not limited to the embodiment.

[0091]

As described above, according to the present invention, another video signal and audio signal are additionally recorded on a conventional recorded recording medium without using an expensive image memory or time base compression processing, and two channels of two channels are recorded. The video signal and the audio signal can be simultaneously reproduced, and the long-time recording / reproducing that is twice as long as the conventional 1-channel recording / reproducing becomes possible. Further, since recording / reproducing is performed at a conventional speed, a means for transporting the recording medium to a low speed is unnecessary, which can be realized without changing the conventional mechanism or the conventional recording format of the recording medium, and the already owned recording medium can be realized. It can be used effectively. Although the amount of information of the reproduced video signal per channel is halved, since one field is reproduced at the frame period, the reproduced video can be enjoyed without any feeling of strangeness such as flicker, and the effect is very large.

Further, each of the video signal and the audio signal can be completed by one track.

Further, the video signal and the audio signal can be recorded in one track in the same recording area by using the deep recording method or the frequency multiplexing method.

Further, by providing the erasing means for erasing the track information prior to the video recording means or the audio recording means, the quality of the reproduced signal after additional recording or re-recording can be improved.

Further, the audio signal obtained by synthesizing the reproduced audio signals of 2 channels on the time axis and the audio signal from the outside are combined into 2
By providing a voice synthesizing means for modulating and synthesizing as one channel, additional recording can be performed without losing the information of one channel before additional recording.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing recording tracks in the first embodiment.

FIG. 3 is a timing chart showing a relationship between a recording signal and a reproduction signal in the first embodiment.

FIG. 4 is a block diagram showing a configuration of a recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram showing a recording track in the second embodiment.

FIG. 6 is a timing chart showing the relationship between a recording signal and a reproduction signal in the second embodiment.

FIG. 7 is a block diagram showing a configuration of a recording / reproducing apparatus according to a third embodiment of the present invention.

FIG. 8 is a schematic diagram showing a recording track in the third embodiment.

FIG. 9 is a timing chart showing a relationship between a recording signal and a reproducing signal in the third and fifth embodiments.

FIG. 10 is a block diagram showing a configuration of a recording / reproducing apparatus according to a fourth embodiment of the present invention.

FIG. 11 is a schematic diagram showing a recording track in the fourth embodiment.

FIG. 12 is a timing chart showing the relationship between a recording signal and a reproducing signal in the fourth embodiment.

FIG. 13 is a block diagram showing the configuration of a recording / reproducing apparatus in a fifth embodiment of the present invention.

FIG. 14 is a schematic diagram showing recording tracks in the fifth embodiment.

FIG. 15 is a schematic diagram showing the arrangement of head groups in the fifth embodiment.

FIG. 16 is a block diagram showing the configuration of a conventional recording / reproducing apparatus.

[Explanation of symbols]

 1 Recording Medium 2 Recording Medium Transfer Means 11 Operation Command Means 41, 61, 66, 72 Video Reproducing Means 42, 65, 70, 73 Video Recording Means 51, 52, 53, 54 Erasing Means 62, 67, 74 Audio Reproducing Means 63 , 69, 75, 78 audio synthesizing means 64, 71, 76 audio recording means 68, 77 video synthesizing means 305 first audio recording / reproducing means 306 second audio recording / reproducing means

Claims (15)

[Claims] 1. An odd field and an even field are 1
A recording / reproducing apparatus for recording / reproducing an interlaced video signal forming a screen on an odd-numbered track and an even-numbered track, and recording / reproducing an audio signal. The recording position of a recording medium is moved according to recording or reproduction. Recording medium transporting means, first audio recording / reproducing means for recording / reproducing an audio signal to / from a first audio track of the recording medium, and recording an audio signal to a second audio track of the recording medium. Second audio recording / reproducing means for reproducing; video recording means for recording an odd field of an external video signal on an odd track or an even field of an even signal on an even track of a video track of the recording medium; Outputs a 2-channel video signal created by separating the reproduction signal of the odd-numbered track and the reproduction signal of the even-numbered track. Video reproduction means, the recording medium transfer means, the first and second audio recording / reproduction means, the operation command means for outputting an operation state command signal to the video recording means and the video reproduction means. However, 2 independent tracks are used for odd and even tracks.
Independent 2 for recording and reproducing channel video signals
Recording / reproducing apparatus for recording / reproducing audio signals of channels. 2. The at least one erasing means for scanning the video track and erasing the recorded signal after the video reproducing means and before the video recording means. The recording / reproducing apparatus described. 3. The first audio recording / reproducing means comprises: a first audio recording means for recording an external audio signal on a first audio track; and a first audio recording preceding the first audio recording means. The second audio recording / reproducing means comprises a second audio recording means for recording an external audio signal on a second audio track, and a first audio reproducing means for scanning a track and reproducing an audio signal. The second audio recording means scans the second audio track and reproduces an audio signal prior to the second audio recording means. The outputs of the first and second audio reproducing means are combined on a time axis. The recording / reproducing apparatus according to claim 1, further comprising a voice synthesizing unit that supplies the generated voice signal to the first or second voice recording unit. 4. An odd field and an even field are 1
A recording / reproducing apparatus for recording / reproducing an interlaced video signal forming a screen on an odd-numbered track and an even-numbered track, and recording / reproducing an audio signal. The recording position of a recording medium is moved according to recording or reproduction. Recording medium transfer means, audio reproducing means for reproducing a two-channel audio signal modulated and synthesized from an audio track of the recording medium, an external audio signal and one audio signal output from the audio reproducing means An audio synthesizing means for outputting an audio recording signal obtained by modulating and synthesizing an audio recording means, an audio recording means for recording the audio recording signal on the audio track, and an odd number of an external video signal for the video track of the recording medium. Video recording means for recording a field on an odd track or an even field on an even track; Of the odd-numbered track and the even-numbered track of the reproduced signal are output to output a 2-channel video signal, the recording medium transporting means, the audio reproducing means, the audio synthesizing means, and the audio. The recording means, the video recording means, and the operation commanding means for outputting an operation state command signal to the video reproducing means, and 2 independent tracks for odd-numbered tracks and even-numbered tracks.
Independent 2 for recording and reproducing channel video signals
Recording / reproducing apparatus for recording / reproducing audio signals of channels. 5. The recorded signal is scanned by scanning the audio track after the audio reproducing means and before the audio recording means, or by scanning the video track after the video reproducing means and before the video recording means. The recording / reproducing apparatus according to claim 4, further comprising at least one erasing unit for erasing. 6. The audio synthesizing means outputs an audio recording signal obtained by modulating and synthesizing a signal obtained by synthesizing the two-channel audio signals output from the audio reproducing means on a time axis into one channel and an external audio signal. The recording / reproducing apparatus according to claim 4, wherein 7. An odd field and an even field are 1
A recording / reproducing apparatus for recording / reproducing an interlaced video signal for forming a screen on an odd-numbered track and an even-numbered track, and recording / reproducing an audio signal. The recording position of a recording medium is moved according to recording or reproduction. Recording medium transporting means, audio reproducing means for reproducing a two-channel audio signal modulated and synthesized from the audio track of the recording medium, an external audio signal and one audio signal output from the audio reproducing means. An audio synthesizing means for outputting an audio recording signal obtained by modulating and synthesizing an audio recording means, an audio recording means for recording the audio recording signal on the audio track, a reproduction signal and an even track of an odd track of a video track of the recording medium Image reproduction means for outputting a 2-channel video signal created separately from the reproduction signal of A video synthesizing unit for creating and outputting a video signal of an odd field and an even field by alternately selecting one video signal output from the video reproducing unit in units of fields, and the video synthesizing unit for the video track. A video recording means for recording a video signal of the output of, a recording medium transporting means, an audio reproducing means, an audio synthesizing means, an audio recording means, the video reproducing means, the video synthesizing means and the video recording means. An operation command means for outputting a command signal of an operation state, the audio reproduction means scans the same audio track prior to the audio recording means, and the video reproduction means operates from the video recording means. By arranging so that the same video track is scanned in advance, independent video signals of two channels are recorded on the odd track and the even track. Recording and reproducing apparatus for recording and reproducing audio signals of two independent channels while live. 8. An audio reproduction means and a video reproduction means, and before the audio recording means and the video recording means,
8. The recording / reproducing apparatus according to claim 7, further comprising at least one erasing unit that scans an audio track or a video track and erases a recorded signal. 9. The voice synthesizing means outputs a voice recording signal obtained by modulating and synthesizing a signal obtained by synthesizing the two-channel voice signals output from the voice reproducing means on the time axis into one channel and a voice signal from the outside. The recording / reproducing apparatus according to claim 7, wherein 10. A recording / reproducing apparatus for recording / reproducing an interlaced video signal for forming one screen with an odd field and an even field on an odd track and an even track, respectively, and recording and reproducing an audio signal, Recording medium transfer means for moving a recording position of a recording medium according to recording or reproduction, and audio reproducing means for reproducing a two-channel audio signal which is modulated and synthesized from the audio track of the recording medium including time-axis compression. And voice synthesizing means for outputting a voice recording signal obtained by modulating and synthesizing a signal obtained by time-axially compressing a voice signal for two fields from the outside into one field or less and one voice signal output from the voice reproducing means. Audio recording means for recording the audio recording signal at the position of the audio track reproduced by the audio reproducing means; Video recording means for recording an odd field of an external video signal to an odd track or an even field of an even track to a body video track, and a reproduction signal of an odd track of the video track and a reproduction signal of an even track A video reproducing means for outputting a 2-channel video signal separately created, a recording medium transferring means, a video reproducing means, a video recording means, a voice reproducing means, a voice synthesizing means, and a voice recording means. And an operation command means for outputting a command signal of an operation state to, and the audio reproduction means is arranged so as to scan the same audio track prior to the audio recording means, and odd tracks and even tracks A recording / reproducing device that records and reproduces independent 2-channel video signals and records and reproduces independent 2-channel audio signals. . 11. An audio track or a video track is scanned after the audio reproducing means and the video reproducing means and before the audio recording means and the video recording means, and at least one erase is performed to erase a recorded signal. The recording / reproducing apparatus according to claim 10, further comprising means. 12. The audio synthesizing means outputs an audio recording signal obtained by modulating and synthesizing a signal obtained by synthesizing the audio signals of two channels output from the audio reproducing means on the time axis into one channel and an external audio signal. Claim 1 characterized by the above.
0 recording / reproducing apparatus. 13. A recording / reproducing apparatus for recording / reproducing an interlaced video signal for forming one screen with an odd field and an even field on an odd track and an even track, respectively, and recording and reproducing an audio signal. Recording medium transfer means for moving a recording position of a recording medium by synchronizing fields of an external video signal and a reproduced video signal, an audio recording means for recording an audio signal on an audio track of the recording medium, and the audio recording. A sound reproducing means for reproducing a two-channel sound signal recorded at a position preceding the recording position of the means by an even multiple field, and a sound signal from the outside and one sound signal of the output of the sound reproducing means. Then, a voice synthesizing means for outputting to the voice recording means, and a video recorder for recording a video signal on the video track of the recording medium. And a 2-channel video signal generated by separating the reproduction signal of the odd track and the reproduction signal of the even track in the video signal recorded at the position preceding the recording position of the video recording means by an even multiple field Image reproduction means, and a video signal from the outside and one of the video signals output from the video reproduction means are alternately selected on a field-by-field basis to create video signals of odd fields and even fields to the video recording means. A command signal of an operating state for the video synthesizing means for outputting, the recording medium transporting means, the audio reproducing means, the audio synthesizing means, the audio recording means, the video reproducing means, the video synthesizing means, and the video recording means. And an operation command means for outputting
Independent 2 for recording and reproducing channel video signals
Recording / reproducing apparatus for recording / reproducing audio signals of channels. 14. An audio track or a video track is scanned after the audio reproducing means and the video reproducing means, and before the audio recording means and the video recording means, and at least one erase is performed to erase the recorded signal. 14. The recording / reproducing apparatus according to claim 13, further comprising means. 15. The voice synthesizing means outputs a voice recording signal obtained by modulating and synthesizing a signal obtained by synthesizing a two-channel audio signal output from the voice reproducing means on a time axis into one channel and an external audio signal. Claim 1 characterized by the above.
3. The recording / reproducing apparatus described in 3.