JPH04291585A - Multi-channel corresponding video tape recorder - Google Patents

Abstract

PURPOSE:To enable the simultaneous recording of plural programs and the recording of the stereoscopic video signal from plural built- in tuners by switching alternately plural video signals together with plural continuous sound signals by one field and recording them. CONSTITUTION:The video signal and the sound signal of a BS tuner 1, a TV tuner 2 and external parts 3 and 4 are restored, and after the sound signal is processed with a digital sound signal or processed with an FM sound signal, the signal is frequency-multiplexed 12, and recorded into the depth part of a magnetic tape 15 with a rotary head 14. On the other hand, after the video signal is modulated by modulating parts 6 and 6a, the signal is recorded to the outer layer part of the tape 15 with a rotary head 8 alternately by one field by selecting switches 21 and 22. The video signal reproduced at the time of reproduction is stored at every field in a memory 25 and the video signal omitted at every other field is interpolated to be read. Thus, plural video signals can also simultaneously be recorded together with the sound signal, and the simultaneous recording of plural programs and the recording of the stereoscopic picture signal can be attained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-channel video tape recorder capable of simultaneously recording or reproducing a plurality of media.

0002

2. Description of the Related Art FIG. 4 is a sectional view of a magnetic tape recording layer of a conventional multi-channel video tape recorder.
In the figure, 27 is a magnetic layer, 28 is a base, 29 is an audio signal recording layer, and 30 is a video signal recording layer.

FIG. 5 is a signal processing block diagram of a conventional multi-channel compatible video tape recorder. In the figure, 1 is a tuner for receiving satellite broadcasting (hereinafter referred to as a BS tuner), and 2 is a tuner for receiving TV broadcasting by UHF or VHF. A tuner (hereinafter referred to as a TV tuner), 3 is an external video signal input terminal, 4 is an external audio signal input terminal, and 5a is a video signal processing section.

The video signal processing section 5a receives the video signal from the BS tuner 1 by switching the movable terminal 21d of the video signal processing input selection switch 21 (hereinafter abbreviated as selection switch) to the fixed terminals 21a to 21c. , T
The video signal from the V tuner 2 and the video signal from the external video input terminal 3 are respectively selected and input, and the selected video signals are processed and output to the video signal modulation section 6.

The video signal modulation section 6 frequency-modulates the output of the video signal processing section 5 and outputs it to the video signal rotary head 8. The video signal rotary head 8 records the video onto the magnetic tape 15. Then, it starts playing.

The modulated video signal recorded on the magnetic tape 15 is reproduced by the video signal rotary head 8 and sent to the video signal demodulation section 7.
The demodulated signal is output to the video signal processing section 5b, and the video signal is taken out from the video output terminal 16.

On the other hand, BS tuner 1, TV tuner 2,
Audio signals from the external audio signal input terminal 4 are input to audio/video signal processing sections 9a to 9c, respectively, where they are processed in accordance with the form of the input signal, such as analog or digital.

Each output of these audio signal processing sections 9a to 9c is connected to a digital audio signal conversion processing input selection switch 19.
(hereinafter abbreviated as selection switch) fixed terminals 19a~
19c, and the digital audio signals applied to these fixed terminals 19a to 19c are selected by the switching operation of the movable terminal 19d of the selection switch 19 and input to the digital audio signal conversion processing section 10a. It has become so.

The outputs of the audio signal processing units 9a-9c are applied to fixed terminals 20a-20c of an FM audio signal processing input selection switch 20 (hereinafter simply referred to as selection switch), respectively. This fixed terminal 20a~
The FM audio signal applied to the audio signal processing section 9a
The output of 9c is input to the FM audio signal processing unit 11a by switching the movable terminal 20d of the selection switch 20.

[0010] The digital audio signal conversion processing section 10a
The output of the FM audio signal processing section 11a and the output of the FM audio signal processing section 11a are input to a frequency multiplexing section 12 and multiplexed.
In addition, the audio signal rotary head 14 records and reproduces audio information on the magnetic tape 15.

The audio information recorded on the magnetic tape 15 is reproduced by the audio signal rotary head 14 and sent to the multiplex signal separation section 1.
The multiplexed signal separator 13 separates the digital audio signal and the FM audio signal, and the digital audio signal is input to the digital audio signal conversion processor 10b. The signal is input to the FM audio signal processing section 11b.

The digital signal processed by the digital audio signal conversion processing section 10b is taken out from the digital audio signal output terminal 17, and the FM audio signal from the FM audio signal processing section 11b is output from the FM audio signal processing section 18. It has become.

Next, the operation will be explained. The BS tuner 1 restores the video signal and the audio signal from the received signal, and the video signal is sent to the fixed terminal 21a of the selection switch 21, and the audio signal is sent to the audio signal processing section 9a depending on the input signal format, such as analog or digital. After being processed, the fixed terminal 19a of the selection switch 19 or the selection switch 21
is output to the fixed terminal 20a.

On the other hand, similarly to the input of the TV tuner 2, the video signal is outputted to the fixed terminal 21b of the selection switch 21, and the audio signal is outputted to the fixed terminal 19b of the selection switch 19 or the fixed terminal 20b of the selection switch 20.

The video signal input to the external video signal input terminal 3 is input to the fixed terminal 21c of the selection switch 21, and the audio signal input to the external audio signal input terminal 4 is input to the selection switch 1.
Fixed terminal 19c of 9, fixed terminal 20 of selection switch 20
It is output to c.

Here, for example, when a program on BS tuner 1 and a program on TV tuner 2 are simultaneously recorded, the audio signal from BS tuner 1 is a digital audio signal and the audio signal from TV tuner 2 is an FM audio signal. I will explain about it.

In the selection switch 19, the fixed terminal 19a and the movable terminal 19d are connected, so that the BS tuner 1
The digital audio signal from T is sent to the digital audio signal conversion processing section 10a via the selection switch 19.
The FM audio signal from the V tuner 2 is sent to the FM audio signal processing unit 11a via the fixed terminal 20b and movable terminal 20d of the selection switch 20, where it is modulated in the frequency band as shown in FIG. 7 and converted into a digital audio signal. After a bias signal is superimposed on the signal, the signal is frequency-multiplexed by the frequency multiplexing section 12 and recorded by the rotary head 14 for audio signals from the deep layer 29 of the magnetic layer 27 shown in FIG. 4 of the magnetic tape 15.

Regarding the video signal, the fixed terminal 21a and movable terminal 21d of the selection switch 21 are connected,
The video signal output from the BS tuner 1 passes through the selection switch 21, undergoes signal processing in the video signal processing section 5a, is modulated into a frequency band as shown in FIG. 6 in the video signal modulation section 6, and is sent to the audio signal rotating head. 14 is used to record the video signal on the surface layer 30 of the magnetic layer 27 in FIG. 4 of the magnetic tape 15, overlapping the audio signal recording layer 29 below.

On the other hand, during reproduction, the modulated audio signal recorded in the deep layer 29 of the magnetic layer 27 of the magnetic tape 15 is reproduced by the audio signal rotary head 14, and the multiplexed signal separation section 13
The signal is separated into a digital audio signal and an FM audio signal.

The former digital audio signal is restored to an audio signal by the digital audio signal conversion processing section 10b, and the latter FM audio signal is restored to an audio signal by the FM audio signal processing section 11b.
The audio signal is output from the audio signal output terminal 18.

The modulated video signal recorded on the surface layer 30 of the magnetic layer 27 of the magnetic tape 15 is reproduced by the video signal rotary head 8, demodulated by the video signal demodulator 7, and then subjected to video signal processing. The signal is restored to a video signal in section 5b. This restored video signal is output from the video signal output terminal 16.

[0022]

[Problem to be Solved by the Invention] Since the conventional multi-channel compatible video tape recorder is configured as described above, it is possible to record multiple types of audio signals, but only one type of video signal can be recorded. Despite having multiple built-in tuners, it was not possible to record multiple programs at the same time. In addition, the approximation technology is based on Japanese Patent Application Laid-Open No.
There is a publication No.-149803.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a multi-channel compatible video tape recorder that can record not only audio signals but also a plurality of types of video signals at the same time.

[0024]

[Means for Solving the Problems] A multi-channel compatible video tape recorder according to the present invention records a plurality of continuous audio signals and a plurality of video signals alternately switched for each field on a magnetic tape. The rotary head for the audio signal is recorded in correspondence with the audio signal, and the rotary head for the video signal has a different azimuth angle from the rotary head for the audio signal. A field memory is provided for storing and interpolating and reading out missing video signals field by field.

[0025]

[Operation] The rotary head for video signals according to the present invention records each of a plurality of video signals alternately on a magnetic tape field by field in correspondence with an audio signal, and when playing back, reproduces the video signals recorded on the magnetic tape. Then, each of the reproduced video signals is stored field by field in the field memory, and by interpolating and reading out video signals that are missing every other field, they can be combined to record multiple programs simultaneously or record stereoscopic video signals. is possible.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a multi-channel video tape recorder according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of one embodiment. In FIG. 1, when describing the configuration, parts that are the same as those in the conventional example shown in FIG. 5 are given the same reference numerals to avoid redundant explanation, and parts that are different from those in FIG. 5 will be mainly described.

As is clear from comparing FIG. 1 with FIG. 5, in FIG. 1, the video signal recording system and reproduction system have been changed as described below, and the audio signal recording system has been changed. The reproduction system is the same as in FIG.

That is, the video signals from the BS tuner 1, TV tuner 2, and external video signal input terminal 3 are simultaneously applied to the fixed terminals 21a to 21c of the selection switch 21 and to the fixed terminals 22a to 22c of the selection switch 22, respectively. By switching the movable terminal 22d of the movable end 22 of the selection switch 22, the fixed terminal 2
Video signals from the BS tuner 1, TV tuner 2, and external video signal input terminal 3 applied to terminals 2a to 22c are selected and input to the video signal processing section 5c.

The video signal processing section 5c performs predetermined processing on the input video signal and outputs it to the video signal modulation section 6a. The video signal modulation section 6a modulates the video signal in a frequency band as shown in FIG. 2, and outputs it to the video signal rotary head 8.

The video signal rotary head 8 records the outputs of the video signal modulators 6 and 6a alternately, field by field, on the magnetic tape 15, and during playback, reproduces the video signal recorded field by field. It has become. The reproduced video signal is applied to fixed terminals 23a and 23b of a reproduced video signal changeover switch 23 (hereinafter abbreviated as a changeover switch), and the fixed terminals 23a and 23b are switched by a movable terminal 23c and input to the video signal demodulation section 7. It is supposed to be done.

The video signal demodulation section 7 demodulates the reproduced video signal and outputs it to the A/D (analog/digital) conversion section 24. The A/D converter 24 digitally converts the video signal and outputs it to the field memory 25. The field memory 25 stores the output of the A/D converter 24 field by field, and outputs the stored contents to the D/A (digital/analog) converter 26 field by field.

The D/A converter 26 converts the video signal output from the field memory 25 into an analog signal field by field, and outputs the analog signal to the video signal processor 5b. The video signal processing section 5b restores the analog-converted video signal to a video signal and outputs it to the video signal output terminal 1.
The video signal is output from 6. The other configurations are the same as in FIG. 5.

Next, the operation of the first embodiment will be explained. First, the BS tuner 1 restores a video signal and an audio signal from the received signal, and the video signal is applied to the fixed terminal 21a of the selection switch 21 and the fixed terminal 22a of the selection switch 22. The audio signal is processed by the audio signal processing unit 9a according to the input signal format, such as analog or digital, and then output to the fixed terminal 19a of the selection switch 19 and the fixed terminal 20a of the selection switch 20.

On the other hand, the video signal and the audio signal are restored in the same way for the input of the TV tuner 1, and the video signal is transmitted to the fixed terminal 21b of the selection switch 21 and the selection switch 22.
The audio signal is output to the fixed terminal 22b of the selection switch 19 and the fixed terminal 20b of the selection switch 20.

The video signal input to the external video signal input terminal 3 is output to the fixed terminal 21c of the selection switch 21 and the fixed terminal 22c of the selection switch 22, respectively. Further, the audio signal input to the external audio signal input terminal 4 is input to the audio signal processing unit 9c, and after being processed by the audio signal processing unit 9c, the audio signal is input to the fixed terminal 19 of the selection switch 19.
c and the fixed terminal 20c of the selection switch 20.

Here, for example, when a program on BS tuner 1 and a program on TV tuner 1 are simultaneously recorded, the audio signal from BS tuner 1 is a digital audio signal and the audio signal from TV tuner 1 is an FM audio signal. I will explain about it.

The fixed terminal 19a and movable terminal 19d of the selection switch 19 are connected, and the digital audio signal of the BS tuner 1 is sent to the digital audio signal conversion processing section 10. Further, in the selection switch 20, the fixed terminal 20b and the movable terminal 20d are connected, and the FM audio signal from the TV tuner 2 is processed by the audio signal processing section 9b, and then passed through the selection switch 20 to the FM audio signal processing section 11. sent to
Therefore, the digital audio signal is modulated in a frequency band as shown in FIG. , the magnetic layer 27 of the magnetic tape 15
is recorded in the deep layer 29 of.

In the selection switch 21, the fixed terminal 21a and the movable terminal 21d are connected, and in the selection switch 22, the fixed terminal 22b and the movable terminal 22d are connected, so that the video signal from the BS tuner 1 and the video signal from the TV tuner 2 are ,
After passing through selection switches 21 and 22, signal processing is performed by video signal processing units 5a and 5c, respectively, and then modulated into a frequency band as shown in FIG. 3 by video signal modulation units 6 and 6a.

Each modulated video signal is supplied to each head of a pair of video signal rotary heads 8 having different azimuth angles from the audio signal rotary head 14, for example, 180° opposite each other, and is alternately supplied for each field. The information is recorded on the surface layer 30 of the magnetic layer 27 of the magnetic tape 15 in an overlapping manner with the audio signal recording layer 29 located below.

When reproducing the audio signal recorded on the magnetic tape 15, the modulated audio signal recorded in the deep layer 29 of the magnetic layer 27 of the magnetic tape 15 is transmitted to the audio signal rotary head 14.
The multiplex signal demultiplexer 13 separates the signal into a digital audio signal and an FM audio signal.

The former digital audio signal is restored by the digital audio signal conversion processing unit 10b, and the latter FM audio signal is restored to an audio signal by the FM audio signal processing unit 11b, and the digital audio signal output terminal 17 and the FM audio The signal is output from the signal output terminal 18.

Further, the modulated video signal recorded on the surface layer 30 of the magnetic layer 27 of the magnetic tape 15 is reproduced by the video signal rotary head 8, and the reproduction signal of each head is transmitted to the fixed terminal 23a of the changeover switch 23, 23b. In this changeover switch 23, the movable terminal 23c is connected to the fixed terminal 23a or the fixed terminal 23b, and the reproduced video signal is input to the video signal demodulation section 7 in order to select and reproduce only one of the videos.

The video signal demodulated by the video signal demodulator 7 is A/D converted by the A/D converter 24, and input to the field memory 25, where it is input every other field to output only one video signal. In order to interpolate the missing selected video signal with the output of the field memory, the data stored in the field memory 25 is read out.

The read video signal is sent to the D/A converter 2.
6, where it is D/A converted, restored to a video signal by a video signal processing section 5b, and outputted from a video signal output terminal 16.

[0045] If it is possible to recognize the correspondence between the head assignment of the video signal and the audio signal at the time of recording, the audio output will correspond to the video recorded from the BS tuner 1, for example, when the video recorded from the tuner 1 is selected and played back. It is only necessary to automatically select and output the digital audio output that was recorded.

In the above embodiment, one BS tuner 1 and one TV tuner 2 are built in, but if two or more tuners are built in, what is the breakdown of BS and TV? It is also possible to have multiple external input systems.

Further, in the above embodiment, the digital audio signal and the FM audio signal are frequency-multiplexed and recorded, but the modulation method and multiplex recording method for each audio signal are not particularly limited as long as a plurality of audio signals can be recorded.

Furthermore, the types of video signals and audio signals that can be recorded simultaneously are not limited to two types, and the format and method of input signals, output signals, and signal processing may be arbitrary.

Further, in the above embodiment, only one system of the reproduced video signals is selected, but the signals may be combined and reproduced on one screen by area division.

Furthermore, by simultaneously recording video signals of the same subject from a plurality of imaging cameras installed at different angles,
It may also be used for recording and reproducing stereoscopic video signals.

[0051]

As described above, according to the present invention, a plurality of continuous audio signals and a plurality of video signals are alternately switched and recorded for each field. Multiple types of video signals can be recorded simultaneously, and multiple programs and stereoscopic video signals can be recorded simultaneously from the built-in multiple tuners.

[Brief explanation of the drawing]

FIG. 1 is a processing block diagram showing the configuration of a multi-channel compatible video tape recorder according to an embodiment of the present invention.

FIG. 2 is a diagram of a video signal recording frequency occupied band applied to the multi-channel compatible video tape recorder of FIG. 1;

FIG. 3 is an audio signal recording frequency occupied band diagram applied to the multi-channel compatible video tape recorder of FIG. 1;

FIG. 4 is a cross-sectional view of a magnetic tape recording layer applied to a conventional multi-channel compatible video tape recorder and the present invention.

FIG. 5 is a block diagram showing the configuration of a conventional multi-channel compatible video tape recorder.

FIG. 6 is a diagram of a video signal recording frequency occupied band applied to a conventional multi-channel compatible video tape recorder.

FIG. 7 is a diagram of a video signal recording frequency occupied band applied to a conventional multi-channel compatible video tape recorder.

[Explanation of symbols]

1 BS tuner 2 TV tuner 5a to 5c Video signal processing section 6, 6a Video signal modulation section 7 Video signal demodulation section 8 Video signal rotary head 10a, 10b Digital audio signal conversion processing section 11
a, 11b FM audio signal processing section 12 Frequency multiplexing section 13 Multiplexed signal separation section 14 Audio signal rotary head 15 Magnetic tape 19 Digital audio signal conversion processing input selection switch 20 FM audio signal processing input selection switch 21 Video signal processing input selection switch 22 Video signal processing input selection switch 23 Playback video signal changeover switch 24 A/D conversion unit 25 Field memory 26 D/A conversion unit

Claims (2)

[Claims] 1. Frequency multiplexing means for multiplexing a plurality of audio signals, and an audio signal rotary head for inputting the output of the frequency multiplexing means to record and reproduce audio signals in a deep part of a magnetic layer of a magnetic tape. , a means for restoring the audio signal reproduced by the audio signal rotary head to the original plurality of audio signals, and a plurality of video signal systems that alternately switch and output a plurality of video signals with different signal formats for each field. a processing means; recording and reproducing the video signal outputted from the video signal processing means on the surface layer of the magnetic layer of the magnetic tape overlappingly with the audio signal recorded on the deep layer for each field; The above rotary head for audio signals is different from a rotary head for video signals having a different azimuth angle, and a rotary head for video signals reproduced by this rotary head for video signals is stored field by field, and a selected video signal that is missing every other field. A multi-channel compatible video tape recorder is provided with a field memory for interpolating and reading a video signal, and a means for restoring the video signal read from the field memory to the original video signal. 2. The multi-channel compatible video tape recorder according to claim 1, wherein the video signal is synthesized into one area-divided screen or only one of the video images is selected and reproduced during playback.