JP2991306B2 - Recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Table of Contents] The present invention will be described in the following order. Industrial application Conventional technology (FIG. 2) Problems to be solved by the invention (FIG. 2) Means for solving the problems (FIG. 1) Function (FIG. 1) Embodiment (FIG. 1) Effect of the invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus, and is suitably applied 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 digital recording of an input digital audio signal on a magnetic tape, an input analog audio signal is converted into a digital audio signal. Digital recording is possible on a magnetic tape.

[0004] In addition, in DAT, in addition to outputting a digital audio signal obtained by reproducing a magnetic tape as it is, a digital audio signal can be converted into an analog audio signal and output.

In particular, when an input digital audio signal is digitally recorded on a magnetic tape and reproduced to be output as a digital audio signal, the sound quality of the audio signal is practically not substantially degraded. In this way, the audio signal can be ideally recorded and reproduced.

[0006] If the audio signal can be ideally recorded and reproduced in this way, the transfer recording and so-called dubbing can be repeated any number of times, and the rights of the author may be significantly violated. There is a serial copy management system (SCMS) that manages the generation of digital audio signal copies as a method of managing and restricting the digital audio signal.

That is, the subcode added to the digital audio signal input to the DAT from a source such as a DAT, a compact disk device, and a satellite broadcast receiver contains digital copy permission information in two bits. The two bits of the digital copy permission information specify whether digital copy is permitted for any number of generations, digital copy is permitted for only one generation, or digital copy is prohibited.

Accordingly, in the DAT, when the digital copy permission information of the sub-code added to the input digital audio signal detects that digital copy is permitted for any number of generations, the digital audio signal is digitally recorded on a magnetic tape. At the same time, new digital copy permission information is recorded as a subcode by designating that digital copy is permitted for any number of generations.

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

When the digital copy permission information added to the input digital audio signal detects that the digital copy is prohibited, the digital recording of the digital audio signal is immediately stopped.

By the way, as shown in FIG.
A so-called DAT system 1 combining an AT and a device comprising various audio signal sources has been proposed.
For example, in this case, the playback D
An AT 2, a compact disk device (CD) 3, and a satellite broadcast receiving device (BS) 4 are built in.

Output digital audio signals D1, D2, and D3 and output analog audio signals A1, A2, and A3 are sent from the reproducing DAT 2, the compact disk device 3, and the satellite broadcast receiving device 4, respectively.
It is input to the selector device 5.

In practice, the amplifier / selector device 5 outputs digital audio signals D1, D2, and D3 input from the reproduction DAT 2, the compact disk device 3, or the satellite broadcast receiving device 4 and the output analog audio in response to a user operation. Select one of the signals A1, A2, A3,
Input digital audio signal DIN of recording DAT6
And an input analog audio signal AIN.

As a result, the digital copy is permitted as the digital copy permission information included in the output digital audio signal D1, D2, or D3 transmitted from the reproduction DAT 2, the compact disk device 3, or the satellite broadcast receiver 4. If it is determined, the user may operate the recording DAT 6 and select to record the input digital audio signal DIN. As a result, the output digital audio signal D1, D2, or D3 transmitted from the reproducing DAT 2, the compact disk device 3, or the satellite broadcast receiving device 4 is selected as the input digital audio signal DIN, and thus the output digital audio signals D1, D2. Alternatively, D3 can be digitally recorded on a magnetic tape.

The output digital audio signal D1,
If it is known from the digital copy permission information included in D2 or D3 that digital copying is prohibited, the user may operate the recording DAT 6 and select to record the input analog audio signal DIN. As a result, the output analog audio signals A1, A2 or A3 transmitted from the reproducing DAT2, the compact disk device 3 or the satellite broadcast receiving device 4 are selected as the input digital audio signals AIN, and thus the output analog audio signals A1, A2 are output. Alternatively, A3 can be digitally recorded on a magnetic tape.

[0016]

However, in the DAT system 1 having such a configuration, the user operates the recording DAT 6 to select whether to record the input digital audio signal DIN or to record the input analog audio signal AIN. Therefore, when recording a source of an audio signal in which a portion where digital copying is permitted and a portion where digital copying is prohibited are mixed, various problems occur.

That is, as described above, the reproduction DAT2,
Output digital audio signals D1, D2, D output from the compact disk device 3 and the satellite broadcast receiving device 4.
3 or when the output analog audio signals A1, A2, and A3 are recorded on the recording DAT 6 as the input digital audio signal DIN or the input analog audio signal AIN, the recording DAT 6 is operated to record the input digital audio signal DIN. When this option is selected, the digital copy permitted portion can be recorded, but the digital copy prohibited portion stops recording and cannot be recorded.

On the other hand, if the user selects the recording of the input analog audio signal AIN by operating the recording DAT 6, the input analog audio signal AIN is also checked for the portion where digital copying is permitted.
And the sound quality is degraded accordingly.

In order to solve such a problem, the user operates the recording DAT 6 to record the input digital audio signal DIN or input the analog audio signal in accordance with the digital copy permission portion and the digital copy prohibition portion. It is considered that whether to record the AIN should be selected. However, in this case, when the permitted portion of the digital copy and the prohibited portion of the digital copy are frequently replaced, there is a problem that a complicated switching operation is required and the user's usability is deteriorated. It was not enough.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to propose a recording apparatus which can solve the conventional problems at once and can greatly improve the usability of a user.

[0021]

According to the present invention, there is provided an analog signal AIN to be inputted.
And a first digital signal DIN obtained by digitizing the analog signal AIN in advance, in the recording apparatus 10 for digitally recording the analog signal AI on the recording medium.
Analog level adjusting means 13 for adjusting the recording level of N
And the analog signal AIN adjusted to the recording level
Analog digital conversion means 14 for converting the first digital signal DIN into the digital signal DIN1 and the transfer permission / non-permission information I of the first digital signal DIN.
DC and recording level information IVL are added and input to one input terminal a, and the second digital signal DIN1 is input to another input terminal b to select one of the one input terminal a and the other input terminal b. Switching means 12 for selectively switching and connecting to the output terminal, copy information detecting means 15 for detecting the transfer permission / non-permission information IDC added to the first digital signal DIN, and a copy information detecting means 15 added to the first digital signal DIN. Volume information detecting means 20 for detecting the recorded level information IVL
And the analog level adjusting means 13 based on the recording level information IVL detected by the volume information detecting means 20 and the transfer permission / non-permission information IDC detected by the copy information detecting means 15. Control means 16 for controlling the switching means 12 by means of
When the content of the transfer permission / non-permission information IDC indicates that the transfer is permitted, the switching means 12 switches so that one input terminal a is connected to the output terminal.
When the content of DC is not permitted to transfer, the switching means 12 is switched so that the other input terminal b is connected to the output terminal.

[0022]

According to the transfer permission / non-permission information IDC, the first
When the transfer of the digital signal DIN is permitted, the input first digital signal DIN is output from the output terminal of the switching means 12, and the transfer of the first digital signal DIN is prohibited. In some cases, the second digital signal DIN1 obtained by converting the input analog signal AIN is output from the output terminal of the switching means 12, so that the user can input the first digital signal DIN.
Recording can be always performed in an optimal state without being aware of whether or not the transfer of IN is permitted. Also the first
The recording level information of the first digital signal DIN is detected from the digital signal DIN, and the recording level of the analog signal AIN is adjusted based on the detected recording level information. The recording level of the second digital signal DIN1 obtained by converting the analog signal AIN is changed to the first digital signal DIN.
It can be adjusted to the same level as the recording level of IN.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In FIG. 1, reference numeral 10 denotes a digital audio tape recorder (DAT) according to the present invention, in which a digital audio signal and an analog audio signal which are commonly transmitted from a source of an audio signal are respectively supplied to a digital input terminal 11a and an analog audio signal. It is input to the input terminal 11b.

An input digital audio signal DIN input through the digital input terminal 11a is supplied to a first input terminal a of a digital analog selection circuit 12,
The input analog audio signal AIN input through the analog input terminal 11b is subjected to analog-to-digital conversion by an analog-to-digital conversion circuit 14 after the volume is adjusted by a volume control circuit 13, and the resulting digital audio signal DIN1 is converted to a digital-analog selection circuit. 1
2 to a second input b.

The input digital audio signal DIN
Is input to the copy information detection circuit 15, and the digital copy permission information IDC detected here is input to the control unit 16. This control unit 1
6 transmits a selection control signal CDA for switching the digital analog selection circuit 12 according to the input digital copy permission information IDC while the automatic selection switch 17 is turned on by the user.

The digital analog selection circuit 12 can select the first or second input terminal a or b by a user's operation, and can also use the selection control signal CDA input from the control unit 16. The first or second input terminal a or b can be selected.

In this embodiment, when the automatic selection switch 17 is turned on, the control section 16 permits digital copy for any number of generations of the digital copy permission information IDC, or permits digital copy for only one generation. To indicate whether to perform the selection, a selection control signal CDA for selecting the first input terminal a of the digital analog selection circuit 12 is generated.

Thus, the digital analog selection circuit 1
2 outputs an input digital audio signal DI
N is input to the digital signal processing circuit 18 as a recording digital audio signal DREC. The digital signal processing circuit 18 performs a predetermined digital signal processing on the input recording digital audio signal DREC, and the recording digital signal SREC obtained as a result is input to the tape drive unit 19, and thus the input digital audio signal DIN Is digitally recorded on a magnetic tape.

When the automatic selection switch 17 is turned on by the control unit 16, the digital copy permission information ID
When the content of C indicates that digital copying is prohibited, the second input terminal b of the digital analog selection circuit 12
Is generated.

Thus, the digital analog selection circuit 1
2 outputs an analog audio signal AIN
Is input to the digital signal processing circuit 18 as a recording digital audio signal DREC, and the input analog audio signal AIN is digitally recorded on the magnetic tape in the same manner as described above.

In this embodiment, the input digital audio signal DIN is input to the volume information detection circuit 20, and the detected digital volume information IVL is supplied to the volume control circuit 13 through the control section 16 as volume control information CVL. Is input to

As a result, since digital copying is prohibited, even when the input analog audio signal AIN is digitally recorded on the magnetic tape, the input analog audio signal AIN is also recorded in accordance with the digital volume information IVL of the input digital audio signal DIN. The volume can be controlled. Thus, the volume at the time of digital recording of the input analog audio signal AIN and the volume at the time of digital recording of the input digital audio signal DIN can be made substantially equal, so that the portion of the audio signal which is permitted to be digitally copied as the source of the audio signal. Even in the case where portions where copying is prohibited are mixed, digital recording can be continuously performed with almost no discomfort.

In the above configuration, for example, this DAT1
0 is the DAT for recording of the DAT system 1 as shown in FIG.
In the case where the user records the source of the audio signal for which it is known that the digital copy is permitted in advance, the user operates the digital analog selection circuit 12 of the DAT 10 in the same manner as in the prior art to record the first. May be switched to the input terminal a. In this way, DAT10
Can digitally record the output digital audio signals D1, D2, D3 sent from the reproducing DAT 2, the compact disk device 3, and the satellite broadcast receiving device 4 on a magnetic tape.

When recording the source of an audio signal for which it is known that digital copying is prohibited in advance, the digital analog selection circuit 12 is operated in the same manner as in the prior art to connect the second input terminal b. Just switch. In this way, the DAT 10 becomes the playback DAT.
2. Output analog audio signals A1, A2 transmitted from the compact disk device 3, the satellite broadcast receiving device 4,
A3 can be digitally recorded on a magnetic tape.

On the other hand, when recording an audio signal source in which a portion where digital copying is permitted and a portion where digital copying is prohibited are mixed, the automatic selection switch 17 may be turned on. . In this way, the digital copy permission information IDC in the subcode SB1 of the input digital audio signal DIN
, The first or second input terminal a or b of the digital analog selection circuit 12 is automatically selected.

That is, digital copy permission information IDC
When the content of the file indicates whether digital copying is permitted for any number of generations or only one generation is permitted,
The first input terminal a of the digital analog selection circuit 12 is automatically selected. As a result, the output digital audio signals D1, D2, and D3 transmitted from the reproducing DAT 2, the compact disk device 3, and the satellite broadcast receiving device 4 are converted to magnetic signals. Digital recordings can be made on tape.

When the contents of the digital copy permission information IDC indicate that digital copying is prohibited, the second input terminal b of the digital analog selection circuit 12 is automatically selected, and as a result, the DAT 2 for reproduction and the compact disk device 3. The output analog audio signals A1, A2, A3 transmitted from the satellite broadcast receiving device 4 can be digitally recorded on a magnetic tape.

As described above, even when the output digital audio signals D1, D2, D3 or the output analog audio signals A1, A2, A3 are selected and digital recording is being performed on the magnetic tape, the subcode SB1 of the input digital audio signal DIN is maintained. When the contents of the digital copy permission information IDC in the middle have changed, the first or second input terminal a or b of the digital analog selection circuit 12 is automatically turned on in accordance with the contents of the changed digital copy permission information IDC. Is selected.

Thus, the digital analog selection circuit 12 is automatically turned on in response to the digital signal copy permission portion or the digital copy prohibition portion of the audio signal source.
Is switched between the first input terminal a and the second input terminal b, so that recording can be always performed in an optimum state without interruption.

Therefore, when recording using this DAT 10, the automatic selection switch 13 should always be turned on, so that the user can make a digital copy of the source of the audio signal to be recorded in advance. It is not necessary to check in advance whether or not the user is permitted or to perform a troublesome operation in accordance with whether or not the digital copying is permitted, and the usability of the user can be significantly improved.

According to the above arrangement, when the digital copying of the input digital audio signal is permitted based on the digital copy permission information, the input digital audio signal to be inputted is recorded on the magnetic tape, and the digital copying is prohibited. By recording on a magnetic tape a digital audio signal corresponding to the input analog audio signal that is input when the digital copying is being performed, the user can always optimize the digital audio signal without being aware of whether or not digital copying is permitted. The DAT 10 that can be recorded in a state can be realized, and the usability of the user can be remarkably improved.

In the above-described embodiment, a case has been described in which a DAT for reproduction, a compact disk device, and a satellite broadcast receiver are used as audio signal sources. However, the present invention is not limited to this, and other audio devices are used. Even if it does in this way, the same effect as the above-mentioned embodiment can be realized.

In the above embodiment, the present invention
Although the case where the present invention is applied to an AT has been described, the present invention is not limited to this, and is widely applicable to a recording / reproducing apparatus adapted to digitally record and reproduce data on various recording media.

[0045]

As described above, according to the present invention, when the transfer of the first digital signal is permitted based on the transfer permission / non-permission information, the input first digital signal is switched. And when the transfer of the first digital signal is prohibited,
By outputting the second digital signal obtained by converting the input analog signal from the output terminal of the switching means, the user can be conscious of whether or not the transfer of the first digital signal is permitted. Therefore, it is possible to realize a recording apparatus that can always perform recording in an optimum state, and thus, the usability of the user can be remarkably improved. Further, the recording level information of the first digital signal is detected from the first digital signal, and the recording level of the analog signal is adjusted based on the detected recording level information. The recording level of the second digital signal obtained by converting the signal can be adjusted to the same level as the recording level of the first digital signal. Thus, the recording level of the analog signal can be adjusted with a simple configuration, and It is possible to record continuously without feeling uncomfortable.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment in which a recording / reproducing apparatus of the present invention is applied to a digital audio tape recorder.

FIG. 2 is a block diagram schematically showing an audio system using a digital audio tape recorder.

[Explanation of symbols]

1 DAT system, 2, 6, 10 DAT, 3
… Compact disk device, 4 …… Satellite broadcast receiver,
5 ... Amplifier / selector device, 11a, 11b ... Input terminal, 12 ... Digital analog selection circuit, 13 ...
Volume control circuit, 14 analog digital conversion circuit,
15: copy information detection circuit, 16: control unit, 17 ...
... Automatic selection switch, 18 ... Digital signal processing circuit, 19 ... Tape drive circuit

Claims (1)

(57) [Claims] 1. A recording apparatus for digitally recording, on a recording medium, an input analog signal and a first digital signal obtained by digitizing the analog signal in advance, wherein an analog level for adjusting a recording level of the analog signal is provided. Adjusting means; analog-to-digital conversion means for converting the analog signal adjusted to the recording level into a second digital signal; and the first digital signal is a first digital signal.
Transfer permission / non-permission information and recording level information are added.
Input to one input terminal and the second digital
A switching means for inputting a signal to another input terminal, selectively switching one of the one input terminal and the other input terminal to connect to the output terminal, and the transfer permission added to the first digital signal; /
Copy information detecting means for detecting non-permission information, and the recording level added to the first digital signal
Volume information detecting means for detecting information; controlling the analog level adjusting means based on the recording level information detected by the volume information detecting means; and controlling the analog level adjusting means based on the copy information detecting means. Control means for controlling the switching means based on the transfer permission / non-permission information, wherein the control means switches the switching means to the one input terminal when the content of the transfer permission / non-permission information is transfer permission. Is switched to connect to the output terminal. When the content of the transfer permission / non-permission information indicates that transfer is not permitted, the switching means is switched so that the other input terminal is connected to the output terminal. A recording device, characterized in that: