JP2000339846A - Signal processing device and magnetic recording / reproducing device - Google Patents

Abstract

(57) Abstract: A signal processing device and a magnetic recording / reproducing device capable of independently generating internal information of external information such as a time code and user's bit or switching an external input are proposed. This signal processing device inputs additional information (time code TC and user's bit UB) recorded together with information by a microcontroller unit 12 to a digital signal processing block 3, and outputs internal TC, UB.
The additional information is generated by the generation block 9 and the selector 1
0, the external input or internal generation of the additional information from the external TC and UB input / output block 7 is switched.
EXT / INT switching block 8 selects selector 1
0 switching is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to, for example, a magnetic recording / reproducing apparatus for recording or reproducing information on a magnetic recording medium.

[0002]

2. Description of the Related Art Conventionally, a time code and user's bit are recorded on a magnetic tape together with user data. The time code is used to manage the recording / reproducing time, and the user's bit records arbitrary management information of the user.

In this case, the time code and the user's bit can be generated inside the magnetic recording / reproducing apparatus, or can be input from outside.

[0004]

As for the time code and the user's bit in the conventional magnetic recording / reproducing apparatus described above, since the internal generation or the switching of the external input is interlocked, both the time code and the user's bit are internally generated. In addition, there is a disadvantage that only a magnetic tape on which information is recorded in a state of external input can be created.

The present invention has been made in view of the above points, and a signal processing apparatus and a magnetic recording / reproducing apparatus capable of independently generating internal information such as a time code and user's bits or switching an external input. It is intended to propose.

[0006]

In order to solve the above-mentioned problems, a signal processing apparatus and a magnetic recording / reproducing apparatus according to the present invention include:
It is configured by the following means. In a magnetic recording / reproducing apparatus, information is recorded or reproduced on a magnetic recording medium using a recording unit. In the signal processing device at the preceding stage of the recording means in the magnetic recording / reproducing device, signal processing is performed so that information can be magnetically recorded. The signal processing device is particularly configured to input additional information recorded together with the information by the additional information input unit, generate the additional information by the internal generation unit, switch the external input or the internal generation of the additional information by the switching unit, Controls the switching of the switching means. The additional information is a time code and user's bit.

According to the present invention, the following operations are performed. The control means controls the switching of the external input or internal generation of the additional information of the switching means, so that the external input or internal generation of the time code and the user's bit can be independently switched. As a result, the time code of the external input and the user's bit of the external input, the time code of the external input and the user's bit of the internal input, the time code of the internal input and the user's bit of the external input,
It is possible to create four types of magnetic tapes: an internal input time code and an internal input user's bit.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. The signal processing device according to the present embodiment is applied to a VTR (Video Tape Recorder) constituting a magnetic recording / reproducing device, and externally inputs or internally generates a time code and user's bits recorded on a magnetic tape. By making the switching of the magnetic tape independent, it is possible to create a magnetic tape having a high degree of freedom.

FIG. 1 is a system block diagram showing a configuration of a signal processing device according to an embodiment of the present invention. In FIG. 1, in a magnetic recording / reproducing apparatus, during recording, a video signal supplied to an input terminal 1 is subjected to input / output processing by an input / output circuit 2, and the input / output processed video signal can be digitally recorded by a digital signal processing block 3. Are subjected to signal processing such as modulation, and the video signal subjected to digital recording signal processing is magnetically recorded on the magnetic tape 5 by the magnetic head 4 so as to form a helical track.

At the time of reproduction, a video signal magnetically recorded on the helical track is reproduced by tracing the helical track formed on the magnetic tape 5 by the magnetic head 4. The reproduced video signal is subjected to signal processing such as demodulation so as to be digitally reproducible by a digital signal processing block 3, and the video signal subjected to digital reproduction signal processing is subjected to input / output processing by an input / output circuit 2, and an output terminal (not shown) Output from

Here, the time code TC and the user's bit UB are supplied to the digital signal processing block 3 and are added to the recording signal at the time of recording and are magnetically recorded on the magnetic tape 5 together with the video signal. It is taken out and used for reproduction processing or editing processing.

In the present embodiment, such a time code TC and user's bits UB are generated by an internally generated time code INT T generated by an internal TC and UB generation block 9 in the micro control unit MCU 12.
C and an internally generated user's bit INT UB and an external T outside the microcontroller MCU12.
C, an externally generated time code E supplied from the external UB input terminal 6 via the external TC and external UB input / output block 7
XT TC and externally generated user bits EXT U
B is switched by the selector 10 in response to a selection signal input by the user.

That is, the externally generated time code EXT TC and the externally generated user's bit EXT UB input from the external TC and external UB input terminal 6 via the external TC and external UB input / output block 7 are temporarily stored in the micro control unit MCU 12. The data is taken into the latch 11.

Then, the internally generated time code INT T
C and the internally generated user's bit INT UB, and the externally generated time code EXT TC and the externally generated user's bit EXT UB are independently supplied to one fixed contact and the other fixed contact of SW1 and SW2 in the selector 10, respectively. .

Specifically, the internally generated time code INT
TC and externally generated time code EXT TC are SW
One of the fixed contacts and the other of the fixed contacts,
An internally generated user's bit INT UB and an externally generated user's bit EXT UB are supplied to one fixed contact and the other fixed contact of SW2.

For example, a time code external / internal switching selection signal TC INT / EXT sel and a user's bit external / internal switching are output from the TC / UB external / internal switching block 8 by a user's selective input instruction by input means (not shown). Selection signal UB INT / EXT se
1 to generate SW1 and SW1 in the selector 10.
2 control terminal. Thereby, SW1 and S
W2 is a time code external / internal switching selection signal TC I
Based on NT / EXT sel and user's bit external / internal switching selection signal UB INT / EXT sel, the movable contact is switched and connected to one or the other fixed contact.

The time code TC and the user's bits UB described above may be recorded in the longitudinal direction of the magnetic tape 5 or may be recorded on a helical track.

In this manner, independent switching between the internal generation / external supply of the time code TC and the user's bit UB can be performed.

In the above-described embodiment, an example is shown in which the above-described signal processing device is adapted to the digital magnetic recording format in the digital magnetic recording / reproducing device. However, the present invention is not limited to this, and the same applies to other magnetic recording formats. Thus, the above-described signal processing device can be adapted.

Thus, by independently switching the internal generation / external supply of the time code TC and the user's bit UB, the external input time code and the external input user's bit (EXT TC / EXT UB), the external input time Code and internal input user's bit (EXT TC / INT UB), internal input time code and external input user's bit (INT TC)
/ EXT UB), internal input time code and internal input user's bit (INT TC / INT U
The four types of magnetic tapes B) can be created, and the degree of freedom of the user's selection can be increased.

Thus, editing work can be easily performed in another editing apparatus, storage and output or management can be easily performed, and the above-described four time codes T can be used.
Mutual editing of magnetic tapes similar to one of C and user's bit UB can be easily performed.

The signal processing apparatus according to the present embodiment enables a magnetic recording / reproducing apparatus for recording or reproducing information on a magnetic tape 5 as a magnetic recording medium using a magnetic head 4 as a recording means so that the information can be magnetically recorded. In a signal processing device for performing signal processing, a time code TC and user's bit UB as additional information recorded together with the above information
A micro control unit (MCU) 12 as an additional information input means for inputting the information, an internal TC and UB generation block 9 as an internal generation means for the additional information, and a switching means for switching between external input or internal generation of the additional information And the TC, UB EXT / INT switching block 8 as control means for controlling the switching of the switching means, so that the independent generation / external supply of the time code TC and the user's bit UB is performed. Thus, the time code TC and the user's bit UB arbitrarily selected by the user can be added to the information to be recorded.

The magnetic recording / reproducing apparatus according to the present embodiment enables magnetic recording on a magnetic tape 5 as a magnetic recording medium by using a magnetic head 4 as recording means and a digital signal processing block 3 as signal processing means. In a magnetic recording / reproducing apparatus for recording or reproducing signal-processed information, a micro control unit (MCU) 12 as additional information input means for inputting additional information recorded together with the information, and an internal generation means for the additional information Internal TC, UB generation block 9, selector 10 as switching means for switching the external input or internal generation of the additional information, and TC, UB EXT / INT switching block 8 as control means for controlling the switching of the switching means And the internal generation of the time code TC and the user's bit UB. Independent switching of the production / external supply
A magnetic tape of a time code TC and a user's bit UB arbitrarily selected by a user can be created.

[0024]

According to the configuration of the signal processing device of the present invention, the time code TC and the user's bit UB can be independently switched between internal generation and external supply, and the external input time code and the external input user's bit (EXT) can be switched.
TC / EXT UB), external input time code and internal input user's bit (EXT TC / INT)
UB), internal input time code and external input user's bit (INTTC / EXT UB), internal input time code and internal input user's bit (I
The additional information can be added to the information in four combinations of NT TC / INT UB), and the effect of increasing the freedom of the user's selection can be obtained.

Further, with the configuration of the magnetic recording / reproducing apparatus of the present invention, independent switching between internal generation / external supply of the time code TC and the user's bit UB can be performed, and the time code of the external input and the user's bit ( EXT TC / EXT UB), an external input time code and an internal input user's bit (EXT TC
/ INT UB), internal input time code and external input user's bit (INT TC / EXT U
B), it is possible to create a magnetic tape with four combinations of an internal input time code and an internal input user's bit (INT TC / INT UB), thereby increasing the degree of freedom of the user's selection. It works.

[Brief description of the drawings]

FIG. 1 is a system block diagram illustrating a configuration of a signal processing device according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input terminal, 2 ... Input / output circuit, 3 ... Digital signal processing block, 4 ... Magnetic head, 5 ... Magnetic tape, 6 ... EXT TC, EXT UB Input terminal, 7
…… External TC, UB I / O block, 8 …… TC, UB
EXT / INT switching block 9, internal TC,
UB generation block, 10 ... selector, 11 ... latch, 12 ... micro control unit (MC
U), SW1 ... TC INT / EXT switch, SW2 ... UB INT / EXT switch

Claims (6)

[Claims] 1. A signal processing device for magnetically recording information on a magnetic recording / reproducing device for recording or reproducing information on a magnetic recording medium using a recording means, wherein additional information recorded together with the information is input. Additional information input means, internal generation means for the additional information, switching means for switching between external input or internal generation of the additional information, and control means for controlling switching of the switching means. Signal processing device. 2. The signal processing device according to claim 1, wherein the additional information is a time code. 3. The signal processing device according to claim 2, wherein the additional information is user's bits. 4. A magnetic recording / reproducing apparatus for recording / reproducing information which has been subjected to signal processing so as to be magnetically recordable by a signal processing means using a recording means on a magnetic recording medium, wherein an additional information which is recorded together with the information is inputted. A magnetic unit comprising: an information input unit; an internal generation unit of the additional information; a switching unit that switches external input or internal generation of the additional information; and a control unit that controls switching of the switching unit. Recording and playback device. 5. The magnetic recording / reproducing apparatus according to claim 4, wherein the additional information is a time code. 6. The magnetic recording / reproducing apparatus according to claim 5, wherein the additional information is user's bit.