JPH10208201A - Magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a picture smoothly at high speed on a monitor TV without the unnatural feeling to the user by discriminating whether the information recorded on a magnetic tape is the digital recording or analog recording. SOLUTION: When the magnetic tape capable of recording in digital is inserted, a rotational phase of a rotary drum 3 is controlled by a reference signal SREF from a digital signal processing circuit 11. The discriminations as to the kind of magnetic tape 4, a magnetic tape running speed at the recording time and the existence of analog video signal of a reproduced signal are executed by a circuit 60 for discriminating the kind of tape, a circuit 70 for discriminating the running speed of tape and a circuit 25 for detecting the analog video signal, then the signal outputted from the magnetic recording/ reproducing device is automatically changed over by changing over switches 22, 23, 24, 32, 33 and 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a magnetic recording / reproducing apparatus having a function of recording and reproducing digital information signals and recording and reproducing analog video and audio signals in combination with a digital broadcast receiving unit. And a magnetic recording and reproducing apparatus.

[0002]

2. Description of the Related Art At present, home video and audio signal recording / reproducing devices include an analog VT using a magnetic tape.
R has been put to practical use.

On the other hand, practical use of digital TV broadcasting has been promoted as next-generation TV broadcasting. For example, analog video and audio signals are converted to MPEG (Moving Picture Experts Groove).
2. Description of the Related Art There has been known a system for performing high-efficiency digital compression encoding using an up) method and broadcasting through a satellite or a coaxial cable.

[0004] These digital broadcasting systems are described, for example, in Journal of the Institute of Television Engineers of Japan, Vol. 47, No. 4, 1993, pp. 486-503, "5.
Broadcast service image ".

[0005]

Recently, these digital TV broadcasts have been put to practical use and implemented in a form mixed with analog TV broadcasts. However, in a conventional analog VTR, these digital information signals are converted into digital signals. Recording and playback could not be performed as is. Therefore, a digital broadcast receiving unit, a magnetic recording / reproducing unit having a digital information signal recording / reproducing function and an analog video / audio signal recording / reproducing function, and having compatibility with the current analog VTR are provided. Magnetic recording / reproducing apparatuses capable of recording and reproducing digital compression-coded video and audio signals as digital signals have been developed.

[0006] In such a magnetic recording / reproducing apparatus, at the time of reproduction, it is determined whether the information recorded on the magnetic tape is digital recording or analog recording, so that the user can smoothly monitor the television without any discomfort. It is necessary to display images on the Here, the reference signal for the rotation phase of the rotating drum is a reference signal output from the digital signal processing means in the case of digital reproduction, and is a reference signal from the analog video signal processing means in the case of analog reproduction, and is different. Further, the digital signal processing means has a narrower allowable range of the rotational phase shift of the rotating drum than the analog signal processing means, and it takes time from the start of the rotational phase control to the reaching of the allowable range. That is, analog
During the digital discriminating operation, it is desired to avoid switching the rotation phase of the rotating drum from the reference signal output from the analog signal processing means to the reference signal output from the digital signal processing means. Further, it is not preferable that the video and audio output to the monitor television during the analog / digital discrimination operation are interrupted or noise is generated.

An object of the present invention is to provide a digital broadcast receiving unit, a magnetic recording / reproducing unit having a digital information signal recording / reproducing function and an analog video / audio signal recording / reproducing function, and to be compatible with a current analog VTR. It can record and reproduce digital compression coded video and audio signals such as digital TV broadcasts as digital signals, and determines whether the information recorded on the magnetic tape is digital recording or analog recording. It is an object of the present invention to provide a magnetic recording / reproducing apparatus capable of determining and displaying an image on a monitor television at high speed and smoothly without user's discomfort.

[0008]

In order to achieve the above object, a magnetic recording / reproducing apparatus according to the present invention has a digital broadcast receiving unit, a digital information signal recording / reproducing function, and an analog video / audio signal recording / reproducing function. In the magnetic recording / reproducing apparatus including the magnetic recording / reproducing unit, first, the type of the magnetic tape is determined, and when a magnetic tape capable of digital recording is inserted, the rotating drum is driven by a reference signal from a digital signal processing circuit. This is realized by automatically switching the signals output from the magnetic recording / reproducing apparatus by determining the rotational speed of the magnetic tape during recording and the presence / absence of an analog video signal of the reproduced signal.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a magnetic recording / reproducing apparatus according to the present invention. Here, 100 is a magnetic recording / reproducing unit, 1a, 1b, 2a, 2b are magnetic heads, 3 is a rotating drum, 4 is a magnetic tape, 5 and 6 are recording / reproducing changeover switches, 7, 8 are recording / reproducing amplifiers, 9, 1
0 is a digital-analog recording switch, 11
Is a digital signal processing circuit, 12 is a digital signal input terminal, 13 is a digital signal output terminal, 21 is an analog video signal processing circuit, 22, 23 and 24 are analog video signal changeover switches, 25 is an analog video signal detection circuit, 90 Is an on-screen display circuit, 26 and 28 are analog video signal input terminals, 27 is an analog video signal output terminal, 31 is an analog audio signal processing circuit, 32, 33, and 3
4 is an analog audio signal changeover switch, 35 and 37 are analog audio signal input terminals, 36 is an analog audio signal output terminal, 41 is a switching signal output terminal, 40 is a system control circuit, 50 is a servo circuit, and 60 is a tape type discriminating circuit. , 70 is a tape running speed discrimination circuit, 80 is an analog broadcast receiving tuner, 801 is an analog broadcast signal input terminal,
821 is an analog video signal output terminal, 831 is an analog audio signal output terminal, 200 is a digital broadcast receiving unit, 201 is a digital broadcast signal input terminal, 202 is a digital broadcast receiving tuner, 203 is a digital signal switching circuit, 204 is a decoder, 211 Is a digital signal output terminal, 212 is a digital signal input terminal, 221
Is an analog video signal output terminal, 231 is an analog audio signal output terminal, 241 is a switching signal input terminal, 300 is a monitor television, 321 is an analog video signal input terminal,
331 is an analog audio signal input terminal. Further, although not shown, there is a tape traveling mechanism for traveling by winding the magnetic tape 4 around the rotating drum 3.

First, the operation for recording a digital broadcast signal will be described.

The system control circuit 40 controls the control signal CRP.
1, the recording / reproduction changeover switches 5 and 6 are switched to the "R" side, and the digital-analog recording changeover switches 9 and 10 are switched to the "D" side by the control signal CAD1. Further, the servo signal 50 synchronizes the rotation speed of the rotary drum with R1 and the rotation phase with the reference signal SREF output from the digital signal processing circuit 11 by the control signal CM, and sets the running speed of the magnetic tape 4 at V2. Control.

A digital broadcast signal input to a digital broadcast signal input terminal 201 is demodulated into a digital signal by a digital broadcast receiving tuner 201, and the digital signal is transmitted to a digital signal output terminal 211 and an “R” signal of a digital signal switching circuit 203. Supplied to the side input terminal. The digital signal output from the digital signal output terminal 211 is output via the digital signal input terminal 12
The signal is input to the digital signal processing circuit 11. The input digital signal is subjected to transmission path coding processing such as addition of error correction code and modulation, etc., and is passed through a digital-analog recording switch 9, recording / reproducing amplifier 7, recording / reproducing switch 5, and a magnetic head 1a. And 1b are recorded on the magnetic tape 4. At this time, for example, the diameter of the rotating drum 3 is 62 mm, and the rotating speed R1 is 30 rps.
And the running speed V2 of the magnetic tape 4 is set to 16.67 mm / s.
Then, the pitch of the recording tracks recorded on the magnetic tape 4 is about 29 μm.

Further, when the system control circuit 40 controls the output of the digital signal switching circuit 203 to the “R” side via the switching signal output terminal 41 and the switching signal input terminal 241 by the control signal CRP2, the digital broadcast reception The output of the tuner 201 is input to the decoder 204 and is converted into analog video and audio signals. When the analog video signal changeover switch 24 and the analog audio signal changeover switch 34 are further controlled to the “D” side by the control signal CAD2, the analog video signals are output to the analog video signal output terminal 221, the analog video signal input terminal 26, Analog video signal switching circuit 24, on-screen display circuit 90, analog video signal output terminal 27
The analog audio signal is supplied to the analog video signal input terminal 321 of the monitor television 300 via the analog audio signal output terminal 231, the analog audio signal input terminal 35, the analog video signal switching circuit 34, and the analog audio signal output terminal. Monitor TV 300 via 36
Is supplied to the analog audio signal input terminal 331. This allows the user to view the digital broadcast program being recorded.
The control signal CT switches the analog video signal switch 23 and the analog audio signal switch 33 to the “Ti” side, and the control signal CS causes the analog video signal switch 22 and the analog audio signal switch 32 to receive analog broadcast. When switching to the tuner output and the digital-analog recording changeover switches 24 and 34 are switched to the “A” side by the control signal CAD2, during the recording of the digital broadcast,
It is also possible to view a program received by an analog broadcast receiving tuner.

Next, the operation for recording an analog video signal will be described.

The system control circuit 40 controls the control signal CRP.
1, the recording / reproduction changeover switches 5 and 6 are switched to the "R" side, and the digital-analog recording changeover switches 9 and 10 are switched to the "A" side by the control signal CAD1. Further, the servo circuit 50 synchronizes the rotation speed of the rotary drum with R2, the rotation phase with the reference signal SYNC output from the analog video signal processing circuit, and sets the running speed of the magnetic tape 4 at V1 by the control signal CM. Control.

Analog video signal input terminal 26 or 28
The analog video signal input to the analog video signal tuner 80 or the output signal from the analog video signal output 821 of the analog broadcast receiving tuner 80 is
Is selected by the control signal CS from the system control circuit 40, the recording signal processing is performed in the analog video signal processing circuit 21, and the digital-analog recording changeover switch 10, the recording / reproduction amplifier 8, the recording / reproduction changeover switch 6, and the magnetic head The data is recorded on the magnetic tape 4 by 2a and 2b. Similarly, the analog audio signal input to the analog audio signal input terminal 35 or 37 or the output signal from the analog audio signal output 831 of the analog broadcast receiving tuner 80 is output from the system control circuit 40 by the analog audio signal changeover switch 32. The recording signal processing is performed by the analog audio signal processing circuit 31, and the magnetic tapes are transferred by the magnetic heads 1a and 1b through the digital-analog recording switch 9, the recording / reproducing amplifier 7, and the recording / reproducing switch 5. 4 recorded. At this time, the recording audio signal is recorded on the deep layer of the magnetic tape 4 and the recording video signal is recorded on the surface layer of the magnetic tape 4. For example, the diameter of the rotating drum 3 is 62 mm, and the rotating speed R2 is 29.97.
rps, the running speed V1 of the magnetic tape 4 is set to 33.35 m.
Assuming m / s, the pitch of the recording tracks recorded on the magnetic tape 4 is about 58 μm. The magnetic tape 4
Is V3 = 11.12 mm / s, the pitch of the recording tracks recorded on the magnetic tape 4 is about 19
μm. Further, similarly to the case of recording a digital broadcast signal, it is possible to watch an analog broadcast program being recorded on the monitor television 300, and it is also possible to watch a digital broadcast program.

Next, the reproducing operation will be described. At the time of reproduction, it is determined whether a digital signal or an analog signal is recorded on the magnetic tape 4, and the operation mode of the servo circuit 50 and each switch are appropriately switched to output to the monitor television. Need to be drawn. Here, the material of the discrimination is the type of the magnetic tape, the running speed of the magnetic tape when a signal is recorded on the magnetic tape, and the presence or absence of an analog video signal in the reproduced signal.

First, during standby, the system control circuit 40
The recording / playback switch 5 is controlled by the control signal CRP1.
And 6 are switched to the “P” side, and by the control signal CT,
The analog video signal changeover switch 23 and the analog audio signal changeover switch 33 are switched to the "Ti" side, and the digital-analog recording changeover switches 24 and 34 are switched to the "A" side by the control signal CAD2. Therefore, during standby, the received video and audio signals of the analog broadcast are output to the monitor television 300.

FIG. 2 is a flowchart of the above-described discrimination operation at the start of reproduction. Hereinafter, description will be made in conjunction with FIG.

First, the type of the magnetic tape inserted into the tape running mechanism is determined by a tape type determining circuit 60. These discriminations are usually made using discrimination holes formed in the magnetic tape cassette. For example, a high-performance tape can perform both digital recording and analog recording, and a normal tape can only perform analog recording.

The determination of the tape type is performed immediately when the magnetic tape is inserted into the tape running mechanism, and immediately after that, the rotating drum 3 is rotated. Tape type discriminating circuit 6
In response to the result DT of “0”, if the system control circuit 40 is a magnetic tape capable of digital recording, the servo circuit 5
By 0, the rotation phase of the rotary drum 3 is synchronized with the reference signal SREF generated from the digital signal processing circuit 11. If the recording medium is a magnetic tape on which digital recording is not possible, the rotation phase of the rotating drum 3 is synchronized with the reference signal SYNC generated by the analog video signal processing circuit 21 and the apparatus stands by.

Next, when a reproduction start command is received, the magnetic tape inserted into the tape running mechanism is run, and the running speed of the magnetic tape when a signal is recorded on the magnetic tape is detected. The tape speed discrimination circuit 70, for example, first runs the magnetic tape 4 at a constant speed, counts the number of pulses of the control track output signal at that time, and detects the magnetic tape running speed during recording. The result is transmitted to the system control circuit 40 as a signal DV shown in FIG. 1, and the system control circuit 40 controls the servo circuit 50 by the control signal CM so that the servo circuit 50 runs at the magnetic tape running speed at the time of recording.

Here, assuming that the digital recording is performed only at the tape running speed V2 (16.67 mm / s), if it is determined that the recording is performed at the above-described tape speed V1 or V3, the magnetic tape is analog-recorded. Will be. In this case, the servo circuit 50 synchronizes the rotation phase of the rotating drum 3 with the reference signal SYNC generated by the analog video signal processing circuit 21. Thereafter, the system control circuit 40 switches the analog video signal changeover switch 23 and the analog audio signal changeover switch 33 to the “Ta” side, so that analog video and audio being reproduced can be viewed on the monitor television.

If it is determined that the recording is performed at the tape speed V2, the digital signal switching circuit 2
03 is controlled to the “P” side, and the system control circuit 40 switches the analog video signal switch 24 and the analog audio signal switch 34 to the “D” side. If the magnetic tape is digitally recorded, the reproduced digital signal is converted into an analog video and audio signal by the decoder 204 and can be viewed on a monitor television. Further, the system control circuit 40 switches the analog video signal switch 23 and the analog audio signal switch 33 to the “Ta” side. At this time, if the analog video signal detection circuit 25 detects the analog signal and detects the analog signal, the magnetic tape is recorded as an analog signal. In this case, the servo circuit 50 outputs the analog video signal. The rotation phase of the rotating drum 3 is synchronized with the reference signal SYNC generated by the processing circuit 21.
Thereafter, the system control circuit 40 switches the analog video signal changeover switch 24 and the analog audio signal changeover switch 34 to the “A” side, so that analog video and audio being reproduced can be viewed on the monitor television. If the analog video signal detection circuit 25 does not detect an analog signal, this magnetic tape is recorded digitally. In this case, the reproduced video and audio signals have already been output to the monitor television.
As a detection method of the analog video signal detection circuit 25, for example, there is a method of detecting whether or not a signal output from the analog video signal processing circuit includes a horizontal synchronization signal. As a detection method, for example, there is a method of measuring the number of pulses of the horizontal synchronization signal within a certain time.

FIGS. 3 to 6 show the tape type discriminating circuit 6.
FIG. 3 is a diagram showing timings of operations of a tape speed discrimination circuit 70, an analog video signal detection circuit 25, a servo circuit 50, and switches.

FIG. 3 shows an example in which a digitally recorded magnetic tape is inserted. Immediately before the magnetic tape is inserted, the monitor television 300 outputs the video and the audio received by the analog broadcast receiving tuner. When a magnetic tape is inserted, first, the tape type is detected. As a result, when it is determined that the tape is a digitally recordable tape, the rotating drum 3 is rotated in synchronization with the SREF. Next, when the reproduction is started, the tape speed detection starts. First, the tape is run at the tape running speed V1, the number of pulses of the control track output signal at that time is counted, and detected as V2, which is the magnetic tape running speed at the time of recording. When the tape speed detection is completed, the magnetic tape is caused to run at V2 as the detection result. After that, the analog video signal changeover switch 24 and the analog audio signal changeover switch 34 are switched to the “D” side. After the tape traveling speed is switched from V1 to the traveling speed V2, the tracking operation is completed, and the decoding by the decoder 204 is performed. Since it takes time from the start to the conversion output processing to analog video and audio, the timing of switching the analog video signal changeover switch 24 and the analog audio signal changeover switch 34 to the “D” side is delayed by a predetermined time.
This delay time can be obtained, for example, by measuring the time from the start of reproduction or receiving a signal to start decoding conversion output. When the analog video signal changeover switch 24 and the analog audio signal changeover switch 34 are switched to the “D” side, the monitor TV 30
To 0, the analog video and audio signals converted by the decoder 204 are output. Further, when the analog video signal changeover switch 23 and the analog audio signal changeover switch 33 are switched to “Ta” side, the analog video signal detection circuit 25 detects whether the input signal is an analog video signal. The switching timing at this time is also generated by, for example, a method of measuring time from the start of reproduction. Since the magnetic tape in this example has been digitally recorded, the analog video signal detection circuit 25 determines that it is not an analog video signal. Note that, in the case where digital recording and analog recording are mixed on one magnetic tape, the analog video signal detecting circuit 25 is used.
Continues the detection operation.

FIG. 4 shows an example in which a magnetic tape on which analog recording is performed at a tape speed different from the tape speed V2 of digital recording is inserted into a digitally recordable magnetic tape. Until the tape speed is detected, the same operation as in the above-described example is performed. However, if the magnetic tape traveling speed at the time of recording is detected as V1 or V3 as a result of the tape speed detection, there is no possibility that digital recording is performed in this case. , The rotary drum 3 is rotated in synchronization with the SYNC. Thereafter, when the analog video signal changeover switch 23 and the analog audio signal changeover switch 33 are switched to the “Ta” side while the analog video signal changeover switch 24 and the analog audio signal changeover switch 34 are set to the “A” side, the monitor television 300 The analog video and audio signals reproduced from the magnetic tape and processed by the analog video signal processing circuit 21 and the analog audio signal processing circuit 31 are output.

FIG. 5 shows an example in which a magnetic tape that cannot be digitally recorded is inserted. If it is determined that the tape is a digitally unrecordable tape as a result of the tape type detection, the rotation of the rotary drum 3 is started in synchronization with the SYNC, and the tape speed detection is started. The magnetic tape is run at the speed of the detection result, and thereafter, the analog video signal changeover switch 24 and the analog audio signal changeover switch 34
, The analog video signal switch 23 and the analog audio signal switch 33
Is switched to the “Ta” side, the monitor TV 30
To 0, analog video and audio signals reproduced from the magnetic tape and processed by the analog video signal processing circuit 21 and the analog audio signal processing circuit 31 are output. In this case, since it is known at the time of tape insertion that digital recording has not been performed on the inserted magnetic tape, the timing at which the analog video signal switch 23 and the analog audio signal switch 33 are switched to the “Ta” side is shortened. Output time to the monitor TV can be reduced.

FIG. 6 shows an example in which a magnetic tape that has been analog-recorded at a digital recording tape speed V2 is inserted into a digital-recordable magnetic tape. Immediately before the magnetic tape is inserted, the monitor television 300 outputs the video and the audio received by the analog broadcast receiving tuner. When the magnetic tape is inserted, first, the tape type is detected, and as a result, it is determined that the tape is a digital recordable tape.
And starts the next stage of tape speed detection. When the tape speed detection is completed, the magnetic tape is caused to run at V2 as the detection result. Thereafter, the analog video signal changeover switch 24 and the analog audio signal changeover switch 34 are switched to the “D” side. In this example, since no digital signal is input to the decoder 204, nothing can be viewed from the monitor television 300. Next, when the analog video signal changeover switch 23 and the analog audio signal changeover switch 33 are switched to the “Ta” side, the analog video signal detection circuit 25
Detects whether the input signal is an analog video signal. Since the analog recording is performed on the magnetic tape in this example, the analog video signal detection circuit 25 determines that the signal is an analog video signal, and sets the rotating drum 3 to the SY.
The rotation is performed so as to synchronize with the NC, and further, the analog video signal changeover switch 24 and the analog audio signal changeover switch 34 are switched to the “A” side, thereby completing a series of determination operations. As shown in the figure, the output of the monitor television is disturbed from the time when the reference signal of the rotating drum 3 is switched from SREF to SYNC to the time when synchronization is achieved. This is caused by the analog video signal switch 24 and the analog audio signal. This can be avoided by delaying the timing of switching the changeover switch 34 to the “A” side. Also, a timing occurs when nothing is output to the monitor television. An example to avoid this will be described below.

FIG. 7 is a block diagram showing a second embodiment of the magnetic recording / reproducing apparatus according to the present invention. The difference from FIG. 1 is that an analog video signal changeover switch 29 is added between the analog video signal changeover switches 23 and 24. During standby, the system control circuit 40 switches the analog video signal switch 29 to the “Ti” side according to the control signal CT2.

FIG. 8 shows an example in which a digitally recorded magnetic tape is inserted in the embodiment shown in FIG. The difference from the example shown in FIG. 3 is that the timing at which the analog video signal switch 24 and the analog audio signal switch 34 are switched to the “D” side is determined by setting the analog video signal switch 23 to “Ta”.
To be performed after the video analog video signal detection circuit 25 determines that the signal is not an analog video signal. As a result, the decoder 2 is provided on the monitor television 300.
The analog video and audio signals converted at step 04 are output.

FIG. 9 shows an example in which a magnetic tape on which analog recording is performed at a tape speed different from the tape speed V2 of digital recording is inserted into a magnetic tape on which digital recording is possible. FIG. 10 shows an example in which a magnetic tape that cannot be digitally recorded is inserted. In these cases, the analog video signal changeover switches 23, 2
9 and the analog audio signal switch 33 are simultaneously switched to the “Ta” side.

FIG. 11 shows the embodiment shown in FIG.
This is an example of a case where a magnetic tape that is analog-recorded at a digital recording tape speed V2 is inserted into a digital-recordable magnetic tape. The magnetic tape in this example is
Since analog recording is performed, the analog video signal detection circuit 25 determines that the signal is an analog video signal, rotates the rotary drum 3 to synchronize with the SYNC, and determines that the rotary drum 3 is completely synchronized with the SYNC. After waiting, the analog video signal switch 29 and the analog audio signal switch 33 are switched to the “Ta” side. In this way, by adding and controlling the analog video signal changeover switch 29, the video and audio signals output to the monitor television can be switched smoothly to the analog video and audio signals reproduced from the magnetic tape without disturbance or interruption. .

As described above, during each determination operation,
Since the video and the audio received by the analog broadcast receiving tuner are output, the disturbance of the video and the audio during the operation transition is not output. The rotating drum 3 is first rotated in synchronization with the SREF, and thereafter, the reference signal is kept at the SREF or switched to the SYNC. Thus, when the digital recording tape is reproduced, the rotation phase of the rotary drum 3 is not changed during the determination, so that the time until image output is reduced.

FIG. 12 is a block diagram showing a third embodiment of the magnetic recording / reproducing apparatus according to the present invention. In this example, the magnetic recording / reproducing unit 100 and the receiving unit 200 shown in FIG. 1 or FIG. In this case, there is no need for input / output terminals for each signal that travels between the two units described above.

[0037]

As described above, according to the present invention, whether the information recorded on the magnetic tape is digital recording or analog recording is determined, and the information can be viewed on a monitor television. Time to get faster,
In addition, it is possible to smoothly switch the output without the user's discomfort.

[Brief description of the drawings]

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

FIG. 2 is an operation flowchart of a determination according to the present invention.

FIG. 3 is a diagram showing operation timing according to the present invention.

FIG. 4 is a diagram showing operation timings according to the present invention.

FIG. 5 is a diagram showing operation timing according to the present invention.

FIG. 6 is a diagram showing operation timing according to the present invention.

FIG. 7 is a block diagram showing another configuration example according to the present invention.

FIG. 8 is a diagram showing operation timings according to another configuration example of the present invention.

FIG. 9 is a diagram showing operation timings according to another configuration example of the present invention.

FIG. 10 is a diagram showing operation timing according to another configuration example of the present invention.

FIG. 11 is a diagram showing operation timings according to another configuration example of the present invention.

FIG. 12 is a block diagram showing another configuration example according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 100 ... Magnetic recording / reproducing unit, 1a, 1b, 2a, 2b ... Magnetic head, 3 ... Rotating drum, 4 ... Magnetic tape, 11 ... Digital signal processing circuit, 21 ... Analog video signal processing circuit, 22, 23, 24, 29 ... Analog video signal changeover switch, 25 ... Analog video signal detection circuit, 31 ... Analog audio signal processing circuit, 32, 33, 34 ... Analog audio signal changeover switch, 40 ... System control circuit, 50 ... Servo circuit, 60 ... Tape type Discrimination circuit, 70: tape traveling speed discrimination circuit, 200: receiving unit.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeru Takahashi 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa-ken, Japan

Claims (22)

[Claims] A rotating drum on which a magnetic head is mounted; and a tape traveling mechanism on which the rotating drum is mounted, and a magnetic tape is wound around the rotating drum and travels, and converts an analog video / audio signal and a digital information signal. A magnetic recording / reproducing apparatus which records a selected signal while forming a predetermined track in a diagonal direction of the magnetic tape and reproduces the recorded signal, wherein a digital information signal or an analog audio signal is recorded and reproduced. A second magnetic head group for recording / reproducing an analog video signal; a rotating drum on which the first and second magnetic head groups are mounted; a rotating phase of the rotating drum and a magnetic tape Servo means for controlling the running speed; and a first chip for demodulating the digital broadcast signal and converting it into a first digital information signal. And processing the first digital information signal, recording the magnetic information on the magnetic tape by the first magnetic head group, reproducing by the first magnetic head group, processing the reproduced signal, Digital signal processing means for obtaining two digital information signals; first signal switching means for inputting the first digital information signal and the second digital information signal and selecting and outputting one of the input signals And a digital information signal output from the first signal switching means, and a first analog video signal and a first
And a decoder for converting the analog video signal into an analog audio signal, recording the analog video input signal on the magnetic tape with the second magnetic head group, reproducing the magnetic tape with the second magnetic head group, and processing the reproduced signal. An analog video signal processing means for obtaining a second analog video signal; an analog audio input signal being processed and recorded on the magnetic tape by the first magnetic head group; An analog audio signal processing means for reproducing and processing the reproduced signal to obtain a second analog audio signal; demodulating an analog broadcast signal and converting the analog broadcast signal into a third analog video signal and a third analog audio signal A second tuner; a second signal switching unit that receives the second analog video signal and the analog video input signal and selects and outputs one of the input signals; Third signal switching means for inputting the analog audio signal and the analog audio input signal and selecting and outputting one of the input signals; output of the second signal switching means and the first analog video signal A fourth signal switching means for inputting and selecting one of the input signals, and an output of the third signal switching means and the first analog audio signal, Fifth signal switching means for outputting the input signal, inputting the first analog video signal, the third analog video signal, and a fourth analog video signal input from the outside, A sixth signal switching unit for selecting and outputting any one of the input signals as the analog video input signal to the analog video signal processing unit; the first analog audio signal; A seventh analog signal inputting a analog audio signal and a fourth analog audio signal input from the outside, and selecting and outputting one of the input signals as the analog audio input signal to the analog audio signal processing means; Signal switching means, a tape type determining means for determining the type of the magnetic tape inserted into the tape running mechanism, and a tape running speed determining means for detecting a tape running speed during recording of a recorded magnetic tape during reproduction. An analog recording discriminating unit for detecting whether or not an analog video signal is reproduced from an output signal of the second signal switching unit; and an output of the fourth signal switching unit and the fifth signal switching unit. Connected to an analog video output terminal and an analog audio output terminal, respectively, and the servo means records a digital information signal. And a second mode for recording and reproducing analog video and audio signals. In the first mode, at least a reference signal output from the digital signal processing means is supplied to the reference signal output from the digital signal processing means. Adjusting the rotation phase of the rotary drum in the second mode so as to adjust the rotation phase of the rotary drum to at least the reference signal output from the analog video signal processing means. And the tape traveling speed is made different, and at the time of reproduction, the mode of the servo means, the mode of the second,
A magnetic recording / reproducing apparatus comprising: control means for automatically switching among third, fourth, fifth, sixth, and seventh signal switching means. 2. A rotary drum on which a magnetic head is mounted, and a tape traveling mechanism on which the rotary drum is mounted, and a magnetic tape is wound around the rotary drum and travels, and converts analog video / audio signals and digital information signals. A magnetic recording / reproducing apparatus for recording a selected signal while forming a predetermined track in a diagonal direction of the magnetic tape and reproducing the recorded signal; demodulating a digital broadcast signal to obtain first digital information; A first tuner for converting the signal into a signal, a first digital information signal, and a second digital information signal input from the outside, and a first signal outputting one of the input signals according to a selection signal from the outside. A signal switching unit, and a digital information signal output from the first signal switching unit, and a first analog video signal and a first analog video signal.
A first magnetic head group for recording / reproducing a digital information signal or an analog audio signal; a second magnetic head group for recording / reproducing an analog video signal; The rotating drum on which the first and second magnetic head groups are mounted, servo means for controlling a rotation phase of the rotating drum and a running speed of the magnetic tape, and processing the first digital information signal, Digital signal processing means for recording on the magnetic tape by the first magnetic head group, reproducing by the first magnetic head group, and processing the reproduced signal to obtain a second digital information signal; An input signal is processed, recorded on the magnetic tape by the second magnetic head group, reproduced by the second magnetic head group, and the reproduced signal is processed. Analog video signal processing means for obtaining a second analog video signal; processing an analog audio input signal, recording on the magnetic tape with a group of magnetic heads, reproducing with the first magnetic head group, and reproducing the reproduced signal. An analog audio signal processing means for processing to obtain a second analog audio signal; a second tuner for demodulating an analog broadcast signal and converting the analog broadcast signal into a third analog video signal and a third analog audio signal; A second signal switching unit that receives a second analog video signal and the analog video input signal, selects and outputs one of the input signals, and outputs the second analog audio signal and the analog audio input signal. A third signal switching means for inputting, selecting and outputting one of the input signals; an input of the output of the second signal switching means and the first analog video signal; Fourth signal switching means for selecting and outputting one of the input signals; inputting the output of the third signal switching means and the first analog audio signal and selecting one of the input signals A fifth signal switching means for outputting a first analog video signal, a third analog video signal, and a fourth analog video signal input from the outside, and selecting any one of the following. A sixth signal switching unit that outputs the input signal as the analog video input signal to the analog video signal processing unit; a first analog audio signal; a third analog audio signal; A fourth analog audio signal to be input, and selecting and outputting one of the input signals as the analog audio input signal to the analog audio signal processing means. Changing means, a tape type determining means for determining the type of the magnetic tape inserted into the tape running mechanism, a tape running speed determining means for detecting a tape running speed during recording of a recorded magnetic tape during reproduction, A magnetic recording / reproducing unit including an analog recording discriminating means for detecting whether or not an analog video signal is reproduced from an output signal of the second signal switching means; The output of the signal switching means is connected to an analog video output terminal and an analog audio output terminal, respectively, and the servo means has a first mode for recording and reproducing digital information signals and a second mode for recording and reproducing analog video and audio signals. In the first mode, at least the reference signal output from the digital signal processing means is provided. Control the rotational phase of the rotary drum to the reference signal output from the analog video signal processing means at least in the second mode, The rotation phase of the rotary drum and the tape traveling speed are made different, and at the time of reproduction, the mode of the servo circuit according to the result of the discrimination by the tape type discriminating means, the tape traveling speed discriminating means, and the analog recording discriminating means, The second,
A magnetic recording / reproducing apparatus comprising: control means for automatically switching among third, fourth, fifth, sixth, and seventh signal switching means. 3. The apparatus according to claim 1, wherein the second and third signal switching means select to output the analog video input signal and the analog audio input signal, respectively, during standby. And the fifth signal switching means select to output the output signals of the second and third signal switching means, respectively, and the sixth and seventh signal switching means respectively select the third analog video signal. A magnetic recording / reproducing apparatus, which selects to output a signal and a third analog audio signal. 4. The magnetic tape according to claim 3, wherein when a magnetic tape is inserted into the tape running mechanism, the type of the magnetic tape is determined by the tape type determining means, and a digital information signal is recorded on the magnetic tape. If it is determined that the magnetic tape is a type of magnetic tape that is likely to be in the magnetic recording / reproducing apparatus, the servo means is selected in the first mode and the rotary drum is rotated. 5. The magnetic tape according to claim 3, wherein when a magnetic tape is inserted into the tape running mechanism, the type of the magnetic tape is determined by the tape type determining means, and a digital information signal is recorded on the magnetic tape. When it is determined that the magnetic tape is of a type that is not likely to be in the magnetic recording / reproducing apparatus, the servo means is selected in the second mode and the rotary drum is rotated. 6. The magnetic tape according to claim 4, wherein when reproducing the recorded magnetic tape inserted into the tape running mechanism, the magnetic tape is a type of magnetic tape on which a digital information signal may be recorded. If the tape running speed determining means determines that the tape is a magnetic tape recorded at a speed at which a digital information signal may be recorded, the tape running speed during reproduction is set to the servo running speed. Means for selecting the first signal switching means so as to output the second digital information signal, and setting the fourth and fifth signal switching means to the first signal switching means. A magnetic recording / reproducing apparatus for outputting the analog video signal and the first analog audio signal. 7. The method according to claim 6, wherein the fourth and fifth signal switching means are selected to output the first analog video signal and the first analog audio signal. The signal switching means is selected to output a second analog video signal and a second analog audio signal, respectively. If the analog recording determination means determines that the analog video signal is being reproduced, Magnetic recording, wherein said means is selected to said second mode, and said fourth and fifth signal switching means are selected to output the output signals of said second and third signal switching means. Playback device. 8. The magnetic tape according to claim 4, wherein when reproducing the recorded magnetic tape inserted into the tape running mechanism, the magnetic tape is a magnetic tape of a type in which a digital information signal may be recorded. And if the tape running speed determining means determines that the magnetic tape is recorded at a speed at which there is no possibility that a digital information signal is recorded, the servo means is controlled by the second Mode, the tape running speed at the time of recording is set to the tape running speed at the time of recording by the servo means, and the second and third signal switching means are switched to the second analog video signal and the second analog audio signal. A magnetic recording / reproducing apparatus characterized in that it is selected to output a signal. 9. The magnetic tape according to claim 5, wherein when reproducing the recorded magnetic tape inserted into the tape running mechanism, the magnetic tape is a type of magnetic tape having no possibility of recording a digital information signal. In this case, the tape running speed discriminating means detects the tape running speed at the time of recording of the recorded magnetic tape, and the tape running speed at the time of reproduction is set to the tape running speed at the time of recording by the servo means. And a third signal switching means for selecting the second analog video signal and the second analog audio signal to be output. 10. The signal switching device according to claim 3, wherein an output of said second signal switching device and said sixth signal switching are provided between an output of said second signal switching device and an input of said fourth signal switching device. An eighth signal switching means for inputting an output of the means, selecting and outputting one of the input signals to the fourth signal switching means is provided. In a standby state, the eighth signal switching means is provided with the eighth signal switching means. 6. A magnetic recording / reproducing apparatus according to claim 6, wherein an output of said signal switching means is selected to be output. 11. The magnetic tape according to claim 10, wherein when the magnetic tape is inserted into the tape running mechanism, the type of the magnetic tape is determined by the tape type determining means, and a digital information signal is recorded on the magnetic tape. If it is determined that the magnetic tape is a type of magnetic tape that is likely to be in the magnetic recording / reproducing apparatus, the servo means is selected in the first mode and the rotary drum is rotated. 12. A magnetic tape according to claim 10, wherein when a magnetic tape is inserted into said tape running mechanism, said tape type determining means determines the type of said magnetic tape, and a digital information signal is recorded on said magnetic tape. When it is determined that the magnetic tape is of a type that is not likely to be in the magnetic recording / reproducing apparatus, the servo means is selected in the second mode and the rotary drum is rotated. 13. The magnetic tape according to claim 11, wherein when reproducing the recorded magnetic tape inserted into the tape running mechanism, the magnetic tape is a magnetic tape of a type in which a digital information signal may be recorded. If the tape running speed determining means determines that the tape is a magnetic tape recorded at a speed at which a digital information signal may be recorded, the tape running speed during reproduction is set to the servo running speed. Means for selecting the second signal switching means to output a second analog video signal; and determining that the analog video signal is being reproduced by said analog recording determination means. In this case, the servo means is selected to the second mode, and the third and eighth signal switching means are switched to the second analog audio signal. And a magnetic recording and reproducing apparatus according to claim selectively allowed to be to output an output signal of the second signal switching means. 14. The apparatus according to claim 13, wherein when the analog recording determining means determines that the analog video signal is not reproduced, the first signal switching means outputs the second digital information signal. Wherein the fourth and fifth signal switching means are selected to output the first analog video signal and the first analog audio signal. 15. The magnetic tape according to claim 11, wherein when reproducing the recorded magnetic tape inserted in the tape running mechanism, the magnetic tape is a magnetic tape of a type in which a digital information signal may be recorded. And if the tape running speed determining means determines that the magnetic tape is recorded at a speed at which there is no possibility that a digital information signal is recorded, the servo means is controlled by the second Mode, and the tape running speed at the time of recording is set to the tape running speed at the time of recording by the servo means. The second, third, and eighth signal switching means are controlled by the second analog video signal, the second A magnetic recording / reproducing apparatus for outputting the analog audio signal and the output signal of the second signal switching means. 16. The magnetic tape according to claim 12, wherein when reproducing the recorded magnetic tape inserted into the tape running mechanism, the magnetic tape is a type of magnetic tape having no possibility of recording a digital information signal. In this case, the tape running speed discriminating means detects the tape running speed at the time of recording of the recorded magnetic tape, and the tape running speed at the time of reproduction is set to the tape running speed at the time of recording by the servo means. , And third and eighth signal switching means are selected to output the second analog video signal, the second analog audio signal, and the output signal of the second signal switching means. Playback device. 17. The apparatus according to claim 6, further comprising: timer means for selecting the fourth and fifth signal switching means to output the first analog video signal and the first analog audio signal, respectively, during reproduction. The magnetic recording / reproducing apparatus performs the operation after waiting for a certain time by the timer means. 18. The apparatus according to claim 7, 8 or 9, further comprising a second timer means, wherein said second and third signal switching means are used for reproducing said second analog video signal and said second analog audio signal during reproduction. A magnetic recording / reproducing apparatus, wherein the signal is selected to be output after the second timer means waits for a certain time. 19. The apparatus according to claim 13, 15 or 16, further comprising a third timer means, wherein said third and eighth signal switching means are used for reproducing the second analog audio signal and said second signal during reproduction. A magnetic recording / reproducing apparatus, wherein the output of the switching means is selected to be output after a lapse of a certain time by the third timer means. 20. The apparatus according to claim 13, 15 or 16, further comprising: a fourth timer means for selecting said second signal switching means to output said second analog video signal during reproduction. A magnetic recording / reproducing apparatus, wherein the fourth timer means waits for a certain time to elapse. 21. A magnetic recording / reproducing apparatus according to claim 1, wherein said analog recording discriminating means is configured to detect a decoding synchronization signal. 22. A magnetic recording / reproducing apparatus according to claim 21, wherein said analog recording discriminating means is configured to detect a horizontal synchronizing signal of said decoding synchronizing signal.