JPH04274054A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the hand of use by selecting a digital information transfer route when the transfer of information is permitted and selecting an analog information transfer route when the transfer is prohibited. CONSTITUTION:A digital/analog selection circuit 14 of a double DAT deck 10 is so constituted that input terminals (a), (b) can be selected by a user's operation and can be selected by the selection control signal from a control section 12 as well. Namely, the control section 12 generates a signal to select the input terminal (a) when the content of digital copy permission information IDC expresses the permission of a digital copy in the state in which an automatic selection switch 13 is held turned on. Consequently, the digital audio signal route LD is assigned at the time of dubbing. The signal to select the input terminal (b) is generated and the analog audio signal route LA is assigned when the content of the information IDC expresses the prohibition.

Description

[Detailed description of the invention]

0001

[Table of Contents] The present invention will be explained in the following order. Industrial applications Conventional technology (Figure 3) Problems to be solved by the invention (Figure 3) Means to solve problems (Figure 1) Effect (Figure 1) Example (1) First embodiment (Figure 1) (2) Second embodiment (Figure 2) (3) Other examples Effect of the invention

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording/reproducing apparatus, and is suitable for application to, for example, a digital audio tape recorder (DAT).

0003

2. Description of the Related Art Conventionally, in a digital audio tape recorder (DAT), in addition to digitally recording an input digital audio signal on a magnetic tape, the input analog audio signal is converted into a digital audio signal. It is designed to be digitally recorded on magnetic tape.

In addition to directly outputting the digital audio signal obtained by reproducing a magnetic tape, the DAT is also capable of converting the digital audio signal into an analog audio signal and outputting the converted signal.

[0005] Particularly when an input digital audio signal is digitally recorded on a magnetic tape and then reproduced and output as a digital audio signal, there is practically no deterioration in the sound quality of the audio signal. , can ideally record and reproduce audio signals.

[0006] If audio signals could be ideally recorded and reproduced in this way, transcription recording, so-called dubbing, could be repeated any number of times, and there is a risk that the rights of the author would be seriously infringed. There is a serial copy management system (SCMS) designed to manage generations of copies of digital audio signals as a method for managing and restricting copies of digital audio signals.

[0007] That is, the subcode added to the digital audio signal input to the DAT from sources such as the DAT, compact disk device, and satellite broadcasting receiver contains 2 bits of digital copy permission information. The two bits of this digital copy permission information specify whether digital copy is permitted for any number of generations, whether digital copy is permitted for only one generation, or whether digital copy is prohibited.

[0008] Therefore, when the DAT detects that the digital copy permission information of the subcode added to the input digital audio signal permits digital copying for any number of generations, the digital audio signal is digitally recorded on the magnetic tape. At the same time, new digital copy permission information specifying that digital copy is permitted for any number of generations is recorded as a subcode.

Furthermore, when it is detected that the digital copy permission information added to the input digital audio signal permits digital copying for only one generation, the digital audio signal is digitally recorded on the magnetic tape, and a new digital copy is performed. The permission information specifies that digital copying is prohibited and is recorded as a subcode.

Furthermore, when it is detected that the digital copy permission information added to the input digital audio signal prohibits digital copying, the digital recording of the digital audio signal is immediately stopped.

By the way, in such a DAT, as shown in FIG. 3, like the double-deck system of an audio tape recorder using a conventional cassette tape, two DATs are built-in, and from the playback system DAT 1A to the recording system DA
A so-called double DAT deck 1 has been proposed which is capable of dubbing to T1B.

[0012] The reproduction system DAT of this double DAT deck 1
1A, a magnetic tape is driven for reproduction by a tape drive section 2A having a mechanical deck configuration, and a reproduction signal SPB obtained thereby is inputted to a digital signal processing circuit 3A. The digital signal processing circuit 3A performs predetermined signal processing on the reproduced signal SPB, and the resulting reproduced digital audio signal DPB is sent out to the outside through the digital output terminal 4a and is also input to the digital-to-analog conversion circuit 5A. Digital analog conversion circuit 5
A converts the input reproduced digital audio signal DPB into an analog signal, filters this through a low-pass filter 6A, and then outputs it as a reproduced analog audio signal APB through the analog output terminal 4b.

The reproduced digital audio signal DPB obtained by the reproduction system DAT1A is input to the first input terminal a of the digital input switching circuit 7A of the dubbing switching circuit 7 provided in the recording system DAT1B, and the reproduced analog audio signal DPB is inputted to the first input terminal a of the digital input switching circuit 7A of the dubbing switching circuit 7 provided in the recording system DAT1B. is input to the first input terminal a of the analog input switching circuit 7B of the dubbing switching circuit 7. The second input terminals b of the digital input switching circuit 7A and the analog input switching circuit 7B receive an input digital audio signal DIN and an input analog audio signal AIN input from the outside through the digital input terminal 8a and the analog input terminal 8b, respectively. is supplied.

In practice, the digital input switching circuit 7A and analog input switching circuit 7B of this dubbing switching circuit 7 are as follows.
It is designed to be linked with the user's operation, and it is possible to specify whether to dub inside the double DAT deck 1 or to record an audio signal input from the outside. As a result, the reproduced digital audio signal D is output from the output terminal of the digital input switching circuit 7A.
Either PB or input digital audio signal DIN is selected, and recording digital audio signal DREC is selected.
as the first input terminal a of the digital-to-analog selection circuit 9
is input.

Further, from the output terminal of the analog input switching circuit 7B, either the reproduced analog audio signal APB or the input analog audio signal AIN is selected, and after being filtered by the low-pass filter 6B as the recording analog audio signal AREC, it is converted into an analog digital signal. The signal is input to the conversion circuit 5B. The analog-to-digital conversion circuit 5B converts the recorded analog audio signal AREC into a digital signal, and the resulting second recorded digital audio signal DREC1 is input to the second input terminal b of the digital-to-analog selection circuit 9.

The digital/analog selection circuit 9 is configured so that the input path of the recording source can be selected by the user's operation as either the digital audio signal DREC or the analog audio signal AREC, and the output terminal The third recorded digital audio signal DREC2 obtained in the digital signal processing circuit 3
It is input to B. The digital signal processing circuit 3B executes predetermined digital signal processing on the third recorded digital audio signal DREC2, and the resulting recording signal SREC is supplied to the tape drive unit 2B, thus producing a desired audio signal on the magnetic tape. Digitally recorded.

In this way, in this double DAT deck 1, the user switches the digital input switching circuit 7A and the analog input switching circuit 7B of the dubbing switching circuit 7 to the first input terminal a, and also enables digital copying in advance. If it is known that the digital/analog selection circuit 9 is also switched to the first input terminal a, the content played back by the playback system DAT1A can be digitally recorded by the recording system DAT1B via the digital audio signal path LD. can.

On the other hand, if it is known in advance that digital copying is prohibited, by switching the digital/analog selection circuit 9 to the second input terminal b, the contents reproduced by the reproduction system DAT 1A can be converted into analog data. Digital recording can be performed by the recording system DAT1B through the audio signal path LA.

[0019]

[Problems to be Solved by the Invention] However, in the double DAT deck 1 having such a configuration, the user can switch the dubbing route, so there are areas where digital copying is permitted and areas where digital copying is prohibited. Various problems occur when attempting to dub a magnetic tape that contains mixed parts.

That is, when dubbing the above-mentioned magnetic tape, the first input terminal a of the digital analog selection circuit 9
When selecting and specifying the digital audio signal path LD, the part where digital copy is allowed can be dubbed, but the part where digital copy is prohibited stops recording and cannot be dubbed.

On the other hand, when the second input terminal b of the digital/analog selection circuit 9 is selected to specify the analog audio signal path LA, the analog audio The sound quality is degraded by dubbing in the signal path LA.

In order to solve this problem, the user selects the first part of the digital/analog selection circuit 9 according to the digital copy permitted part and the digital copy prohibited part.
It is conceivable that it would be sufficient to switch the input terminal a and the second input terminal b, but this would require a complicated switching operation if the digital copy permitted section and the digital copy prohibited section are frequently interchanged. However, this was still insufficient as a solution since it was necessary and inconvenient for the user.

Further, such a double DAT deck 1 has a digital-to-analog conversion circuit 5A and an analog-to-digital conversion circuit 5B for normal recording and playback, each having low-pass filters 6A and 6B, and an analog audio signal path. When dubbing in LA, since filtering is performed by both low-pass filters 6A and 6B, there is a risk that the sound quality will deteriorate.

The present invention has been made in consideration of the above points, and aims to propose a recording/reproducing apparatus which can solve the conventional problems at once and greatly improve the usability for the user.

[0025]

[Means for Solving the Problems] In order to solve the problems, in the present invention, a first recording medium on which digital recording is performed is driven and controlled, and at least is reproduced to output output digital information DPB and output analog information APB. digital information reproducing means 10A, 20A; digital information recording means 10B, 20B for driving and controlling the second recording medium and digitally recording at least input digital information DREC, DIN or input analog information AREC, AIN; When transferring and recording one recording medium to a second recording medium, the digital information reproducing means 1
Output digital information DPB output from 0A and 20A
digital information transfer path LD that inputs the information into the digital information recording means 10B, 20B, and output analog information APB output from the digital information reproducing means 10A, 20A.
is input into the digital information recording means 10B, 20B, and the transfer recording information IDC included in the output digital information DPB obtained by reproducing the first recording medium is detected, and according to the detection result, Transfer path control means 11, 12, 13, and 14 for selecting the digital information transfer path LD or the analog information transfer path LA are provided.

[0026]

[Operation] The transfer path control means 11, 12, 13, 14 transfer the digital information DP based on the transfer record information IDC.
The digital information transfer path LD is selected when the transfer of digital information DPB is permitted, and the analog information transfer path LA is selected when the transfer of digital information DPB is prohibited. Using the best paths LD and LA, the first recording medium can be transferred and recorded onto the second recording medium.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) First embodiment In FIG. 1, parts corresponding to those in FIG. 3 are given the same reference numerals.
0 generally indicates a double DAT deck according to the present invention, in which the subcode SB on the magnetic tape is sent out from the tape drive section 2A in addition to the reproduction signal SPB, and is supplied to the subcode information detection circuit 11.

The subcode information detection circuit 11 detects digital copy permission information IDC included in 2 bits in the subcode SB, and sends it to the control section 12. When this control section 12 detects that the automatic selection switch 13 is turned on by the user, it selects the digital analog selection circuit 1 according to the digital copy permission information IDC.
A selection control signal CAD for switching between 4 and 4 is sent out.

Similar to the digital/analog selection circuit 9 of the conventional double DAT deck 1 (FIG. 3), this digital/analog selection circuit 14 can select the first or second input terminal a or b by the user's operation. In addition, the selection control signal CAD input from the control section 12 also controls the first
Alternatively, the second input terminal a or b can be selected.

In this embodiment, with the automatic selection switch 13 turned on, the control unit 12 determines whether the contents of the digital copy permission information IDC permit digital copying for any number of generations or permit digital copying for only one generation. When indicating whether to do so, a selection control signal CDA for selecting the first input terminal a of the digital/analog selection circuit 14 is generated. As a result, upon dubbing, the digital audio signal path LD is designated.

[0032] Furthermore, with the automatic selection switch 13 turned on, the control unit 12 inputs the digital copy permission information ID.
When the content of C indicates that digital copying is prohibited, a selection control signal CDA is generated to select the second input terminal b of the digital/analog selection circuit 14. As a result, the analog audio signal path LA is designated upon dubbing.

In the above configuration, for example, this double D
When the user uses the AT deck 10 to dub a magnetic tape for which it is known that digital copying is permitted, the dubbing switching circuit 7 is used as in the conventional case.
The digital input switching circuit 7A and analog input switching circuit 7B may be switched to the first input terminal a, and the digital/analog selection circuit 14 may be operated to switch to the first input terminal a. In this way, the reproduction system DAT10
The content played at A is transferred to the digital audio signal path LD.
Through this, digital recording can be performed using the recording system DAT10B.

Furthermore, when the user dubs a magnetic tape for which it is known that digital copying is prohibited, the user operates the digital/analog selection circuit 14 to switch to the second input terminal b, as in the past. Good. In this way, the content reproduced by the reproduction system DAT10A is transferred to the recording system DAT through the analog audio signal path LA.
You can digitally record at 10B.

On the other hand, this double DAT deck 10
When dubbing a magnetic tape that includes a mixture of areas where digital copy is permitted and areas where digital copy is prohibited, the user must switch between the digital input switching circuit 7A and the analog input switching circuit of the dubbing switching circuit 7. 7B to the first input terminal a, and at the same time turn on the automatic selection switch 13.

In this way, when a magnetic tape is loaded into the tape drive section 2A of the reproduction system DAT 10A, the subcode SB on the magnetic tape is read out, and the digital copy permission information IDC in the subcode SB is read out. Depending on the content, the first
Or the second input terminal a or b is automatically selected.

[0037] That is, digital copy permission information IDC
When the content of indicates whether digital copying is permitted for any number of generations or for only one generation,
The first input terminal a of the digital/analog selection circuit 14 is automatically selected, and as a result, the content reproduced by the reproduction system DAT 10A is digitally recorded by the recording system DAT 10B via the digital audio signal path LD.

Further, when the content of the digital copy permission information IDC indicates that digital copy is prohibited, the second input terminal b of the digital/analog selection circuit 14 is automatically selected, and as a result, the data is reproduced by the reproduction system DAT 10A. The contents are digitally recorded by the recording system DAT 10B through the analog audio signal path LA.

Furthermore, even when the digital audio signal path LD or the analog audio signal path LA is selected and dubbing is started and the magnetic tape is running, the content of the digital copy permission information IDC in the subcode SB on the magnetic tape is If there is a change, the first or second input terminal a or b of the digital/analog selection circuit 14 is automatically selected depending on the content of the changed digital copy permission information IDC.

As a result, the first input terminal a or the second input terminal b of the digital/analog selection circuit 14 is automatically switched depending on the digital copy permitted portion or the digital copy prohibited portion on the magnetic tape. You can always dub using the optimal route without any breaks.

Therefore, when dubbing using this double DAT deck 10, the digital input switching circuit 7A and the analog input switching circuit 7B of the dubbing switching circuit 7 are always switched on.
It is only necessary to switch the automatic selection switch 13 to the first input terminal a and turn on the automatic selection switch 13. In this way, the user does not have to check in advance whether or not digital copying is permitted for the magnetic tape to be dubbed, and there is no need for the user to perform troublesome operations depending on whether digital copying is permitted. The usability of the system can be greatly improved.

According to the above configuration, the reproduction system DAT 10A
When dubbing from the recording system DAT10B, the playback system D
Digital copy permission information ID obtained from AT10A
By automatically selecting the digital audio signal path LD or the analog audio signal path LA according to C and the user's specifications, it is possible to realize a double DAT deck 10A that can always perform dubbing in the optimum condition. User-friendliness can be significantly improved.

(2) Second Embodiment In FIG. 2, parts corresponding to those in FIG. 1 are given the same reference numerals.
0 shows the double DAT deck according to the present invention as a whole, in which the low-pass filter 6B of the recording system DAT 20B is connected between the analog input terminal 8b and the second input terminal b of the analog input switching circuit 7B of the dubbing switching circuit 7. There is.

As a result, even if the analog audio signal path LA is selected when dubbing from the reproduction system DAT 20A to the recording system DAT 20B, the reproduction analog audio signal APB is passed through the low-pass filter 6 of the reproduction system DAT 20A.
Passes only A.

Therefore, as shown in FIG. 1, a low-pass filter 6B is connected between the analog input switching circuit 7B of the dubbing switching circuit 7 and the analog-to-digital conversion circuit 5B, and during dubbing, the reproduced analog audio signal APB is passed through the two low-pass filters 6A, Compared to the configuration in which the signal passes through 6B, the S/N can be improved by not passing unnecessary circuit elements, and ripples in the filter passband can be eliminated to prevent the possibility of deterioration of sound quality.

According to the above configuration, the reproduction system DAT 20A
When dubbing from the recording system DAT20B, the playback system D
Digital copy permission information ID obtained from AT20A
By automatically selecting the digital audio signal path LD or the analog audio signal path LA according to C and the user's specifications, it is possible to realize a double DAT deck 20A that can always perform dubbing in an optimal state.

Furthermore, according to the configuration of this embodiment, even if the analog audio signal path LA is selected during dubbing, the reproduced analog audio signal APB is transferred to the reproduced system DAT1.
By passing only the 0A low-pass filter 6A, the double DAT deck can improve the S/N ratio and prevent the risk of deterioration of sound quality, thereby further improving the usability for the user. 20
A can be achieved.

(3) Other embodiments (3-1) In the second embodiment described above, the recording system DAT
20B low-pass filter 6B is connected to the analog input terminal 8b and the second analog input switching circuit 7B of the dubbing switching circuit 7.
The analog audio signal APB is connected between the input end b of the DAT 20A, and even if the analog audio signal path LA is selected during dubbing, the reproduced analog audio signal APB passes only through the low-pass filter 6A of the reproduction system DAT 20A, but instead of this, With the configuration shown in Fig. 1, the output of the digital-to-analog conversion circuit 5A of the reproduction system DAT 10A is converted into a reproduced analog audio signal APB.
As analog input switching circuit 7B of dubbing switching circuit 7
Alternatively, the input signal may be input to the first input terminal a of the .

In this way, even if the analog audio signal path LA is selected during dubbing, the reproduced analog audio signal APB can be made to pass only through the low-pass filter 6B of the recording system DAT 10B, and thus the second embodiment described above can be made. A similar effect can be achieved.

(3-2) In the above embodiment, a double DAT that combines a reproduction system DAT and a recording system DAT is used.
Although the deck has been described, the present invention is not limited to this, and even if two DATs capable of recording and reproducing are used in combination, the same effect as in the above-described embodiment can be achieved.

(3-3) In the above embodiment, the present invention was applied to a double DAT deck combining two DATs, but the present invention is not limited to this.
This invention is suitable for wide application to recording and reproducing apparatuses that perform transfer recording by combining two recording and reproducing apparatuses that perform digital recording and reproducing on the same recording medium.

[0052]

As described above, according to the present invention, the digital information transfer path is selected when the transfer of digital information is permitted based on the transfer record information, and the analog transfer path is selected when the transfer of digital information is prohibited. By selecting the information transfer path, it is possible to realize a recording and reproducing apparatus that can transfer and record from a first recording medium to a second recording medium using the best path according to the transfer recording information. User-friendliness can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment in which a recording/reproducing apparatus of the present invention is applied to a double DAT deck.

FIG. 2 is a block diagram showing the configuration of a double DAT deck according to another embodiment.

FIG. 3 is a block diagram showing the configuration of a conventional double DAT deck.

[Explanation of symbols]

1, 10, 20...Double DAT deck, 1A, 10A
, 20A...Reproduction system DAT, 1B, 10B, 20B...
Recording system DAT, 2A, 2B...tape drive unit, 3A, 3
B...Digital signal processing circuit, 5A...Digital-analog conversion circuit, 5B...Analog-digital conversion circuit, 6A, 6B...Low-pass filter, 7...Dubbing switching circuit, 9, 14...Digital-analog selection circuit, 1
1...Subcode information detection circuit, 12...Control unit, 13
...Automatic selection switch.

Claims (1)

[Claims] 1. Digital information reproducing means for driving and controlling a first digitally recorded recording medium and at least reproducing it to output output digital information and output analog information; driving and controlling a second recording medium and at least Digital information recording means for digitally recording input digital information or input analog information;
a digital information transfer path for inputting the output digital information outputted from the digital information reproducing means to the digital information recording means when transferring and recording the first recording medium to the second recording medium; detecting an analog information transfer path for inputting the output analog information outputted from the information reproducing means to the digital information recording means, and transcription record information included in the output digital information obtained by reproducing the first recording medium; and a transfer path control means for selecting the digital information transfer path or the analog information transfer path according to the detection result, and when the transfer recording of the digital information is permitted based on the transfer recording information, the above A recording and reproducing apparatus characterized in that a digital information transfer path is selected, and when the transfer and recording of the digital information is prohibited, the analog information transfer path is selected.