JPH0666109B2 - Subcode transmission and processing method in magnetic recording / reproducing apparatus - Google Patents

Description

The present invention relates to a subcode transmission / processing method in a magnetic recording / reproducing apparatus for recording / reproducing a digitalized audio signal (referred to as audio data).

(Background of the Invention) In a magnetic recording / reproducing apparatus for recording / reproducing audio data, the sub-code is recorded / reproduced in addition to the audio data so that a process according to the information carried by the sub-code is performed. Has been done.

As the sub-code, for example, a music number code indicating the number of the music, a time code indicating the elapsed time of the area recorded on the magnetic tape or the elapsed time of one music, automatic reversal and reproduction at a predetermined position of the magnetic tape, There are mechanism control subcodes, etc. for controlling mechanisms such as fast forward, search, stop, etc.

The types of these subcodes are extremely large, and it is of course possible that the magnetic recording / reproducing apparatus is configured to record and reproduce all of the subcodes so that the display and processing corresponding to the subcodes can be performed. Is. On the other hand, in order to handle all such subcodes, the input operation and the input device are complicated.

Therefore, the manufacturer of the recorded magnetic tape or the user of the magnetic recording / reproducing apparatus does not necessarily handle all the subcodes, but may handle only a predetermined subcode. There are also magnetic recording / reproducing devices configured so that only some of the subcodes can be handled.

For this reason, not all the subcode processing functions of the magnetic recording / reproducing apparatus can be used in some cases. In this case, the recorded magnetic tape is reproduced by a magnetic recording / reproducing apparatus capable of handling subcodes other than some or all of the recorded subcodes. Further, there may be a case where all the subcodes recorded on the recorded magnetic tape cannot be displayed and processed. In this case, the number of subcodes that can be handled by the magnetic recording / reproducing apparatus is small, and some of the subcodes recorded on the recording magnetic tape can be reproduced by the magnetic recording / reproducing apparatus. As described above, the correspondence between the recording subcode of the recorded magnetic tape and the subcode that can be handled by the magnetic recording / reproducing apparatus is unknown, and which of the subcode processing functions of the magnetic recording / reproducing apparatus can be used. There was a problem that I could not easily understand.

(Object of the Invention) The present invention has been conceived in view of the above, and it is easy to understand a subcode processing function which can solve the above problems and work.
It is an object of the present invention to provide a subcode transmission / processing method in a magnetic recording / reproducing apparatus.

(Outline of the Invention) The present invention forms and records an index number frame to which index number data corresponding to the content of a selected subcode in a one-to-one correspondence is formed at the time of recording, and an index number frame at the time of reproduction. It is characterized in that usable subcodes are displayed according to the heading number data read out from and the processing corresponding to the subcode corresponding to the heading number data read out is performed.

Further, the processing corresponding to the subcode corresponding to the read index number data is performed by the display means provided for each subcode that can be handled by the magnetic recording / reproducing apparatus.
It is characterized in that it is a display of the display means corresponding to the subcode corresponding to the read heading number data.

(Examples of the Invention) Hereinafter, the present invention will be described with reference to Examples.

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

The audio signal supplied to the input terminal IN is supplied to the recording signal processing device 1 to be converted into audio data, and the recording system 2 including a magnetic head in accordance with a clock signal.
_-1 for recording on the magnetic tape 4 running by the tape running drive device 3.

_{5- 1, 5- 2, ... 5} -n subcode A, B, a subcode signal generating Symbol for generating ... N, the generated subcode example A is track number code, B is the time code, C Is a mechanism sub-code, ..., And, hereinafter, it is assumed that the sub-codes A, B, ..., N are associated with the index number data (a), (b) ,.

A sub-code signal generator 5-based on a signal from the control circuit 6
_{1, 5- 2, ... 5-} n subcode A, B, ..., N and the corresponding heading number data (a), (b), ..., for generating a (n). Subcode signal generator _{5-1, 5-2,} ..., 5-n sub-code and heading number generated from supplying the subcode frame signal generator 1 _1, the second view 1.1,2.1, ... ,
As shown in n.1, for example, a sub-code frame composed of a data string to which a sync signal (SYN) and an error detection code (CRC) are added is generated, and a recording system 2 is sequentially used according to a clock signal.
₁ and record it on the magnetic tape 4 in the same manner as audio data. Further, the index number corresponding to the subcode is supplied to the index number editing circuit 7 to perform editing by arranging the index number data (a), (b), ... (N) in the order as shown by n + ₁ in FIG. . Heading number edited by the heading number editing circuit 7 is supplied to a subcode frame signal generator 1 _1, as shown in n + ₁ of FIG. 2 for example synchronizing signal (SYN), adds an error detection code (CRC) and generating the subcode heading number frame of the data string has been a clock signal simultaneously recorded audio data on the magnetic tape 4 is supplied to the connexion sequentially recording system 2 _1.

The heading number data (a), (b), ..., (n) in the subcode heading number frame are 1.1, 2.1, and 2.1 in FIG.
..., n.1 heading number data (a), (b), ..., (n)
Does not need to be exactly the same as the above, and may be a code corresponding to each of the index number data (a), (b), ..., (n). The control circuit 6 is manually setting device 13 ₁ will be described later via the switch group 12, 13 _2, ..., or by connexion controlled 13-n. The sub code signal generator is not used when not in use subcode _{5-1, 5-2,} ... or below so as not to generate a signal from the control circuit 6 to 5-n manual setter _13-1, instructs the _13-second or 13-n,. The instruction subcode A is not used by, B, ..., or N is not supplied to the subcode frame signal generator 1 _1. At the same time, heading number data (a), (b), which correspond to subcodes not used in the heading number editing circuit 7,
..., or (n) is not supplied. As a result, the index number data (a), (b), ... Or (n) corresponding to the subcodes A, B, ... Or N not using the index number frame (n + ₁ ) in FIG. It becomes 0 ".

The heading number (n + ₁ ) in (n + ₁ ) of FIG.
+ ₁₎ is a heading number of the heading number frame, playback will haunch that the heading number frame by detecting the heading number (n + _1).

Furthermore, the reproduction side the recording data of the recorded magnetic tape 4 is detected by the reproduction system 2 ₂ including the magnetic head, and supplies the reproduced signal processor 8. The detection data supplied by the reproduction signal processing device 8 is reproduced, and the reproduction audio data is converted into an analog signal and supplied to the output terminal OUT. Subcode frame reproduced by the reproduction signal processor 8 for demodulation and supplies the subcode signal regenerator _8-1 in the reproduced signal processor 8. The demodulated sub-code A, B, ..., N subcode indicator 9 ₁ respectively, _9-2, ..., and supplies the 9-n. The heading number frame reproduced demodulates supplied to the subcode signal regenerator _8-1. The demodulated index number frame is supplied to the index number detection circuit 10 to detect each index number (a), (b), ..., (n). The detected heading number frame outputs an ON / OFF control signal in the heading number detecting circuit 10 in accordance with the contents of the heading numbers (a), (b), ..., (N). Subcode indicator 9- _1, each control signal from the heading number detection circuit 10 corresponding, 9 _2, ..., 9-n in, or even the system controller provided so as to a process corresponding to the subcode 11
Lamps provided corresponding to the processing function capable of 11- _1, 11- _2,
... 11-n and the system controller 11 manually setting device 13 1 provided _on, ..., and supplies 13-n of the output switch group 12 for receiving the respective separate.

Note that the manual setting device _13-1, ..., 13-n the manual setting device 13 when performing is provided corresponding to the processable functions of the system controller 11, for example a search by song number
_-1 sets the song number.

The manual setting device in the system controller 11 14 _1, ... 14
-N. Manual setting device 14- _{1, ...,} 14-n instructs the system operation and performs for example, a recording operation, the magnetic tape fast forward operation or the like.

The signal representing the state of the on / off control signal corresponding to the contents of the heading number (a), (b), ..., (n) output from the heading number detecting circuit 10 is a heading number storage circuit.
Supply to 15 and memorize. Heading number storage circuit 15 manually setting device 14 _1, ..., or 14-n by a respective switch on and off of the switch group 12 and outputs the stored contents in the switch group 12 only when an instruction after-Les Corde queuing is made Control. Here, after-recording is to replace a new content by erasing a part of the recorded content and re-recording.

Each switch of the switch group 12, except when instructed and after-Les Corde queuing operation when the selected sub-code is not used to force as described above, when the system is recording mode ie manual setting unit 14 _1, ... or 14-n
All of them are turned on by the recording mode instruction signal from.

In one embodiment of the above as the present invention configured, audio signal supplied to the input terminal IN when the recording mode is converted is supplied to a recording signal processor 1 to audio data, the recording system 2 ₁ Tape feeding device 3 supplied
It is recorded on the magnetic tape 4 which is being driven to run. On the other hand, according to the signal from the control circuit 6, the subcode signal generator 5
- _1, 5 _2, ..., from the 5-n, sub-code A, B, ..., N and heading number (a), (b), ..., it is output (n), the sub-code frame signal generator of Figure 2 is supplied to the _1-1 1.1,2.1, ..., it is recorded together with audio data on the magnetic tape 4 through a recording system 2 subcode frame is generated as shown in n.1. Subcode signal generator _5-1, 5
- _2, ..., some of the 5-n are also those data are supplied from the outside. Subcode generator 5 _1, 5 _2, ..., outputted from the 5-n the heading number (a), (b), ..., (n) is after editing supplied to heading number editing circuit 7, sub are recorded along with the audio data and sub-code frame on the magnetic tape 4 through a code frame signal generator is supplied to the _1-1 second diagram of n + ₁ to indicate the heading number frame is generated recording system 2 ₁ .

When there are unused subcodes, the unused subcodes A, B, ... Or N are not recorded on the tape at all, or the subcode contents are blanked and the corresponding heading number data (a), (b) ),…, Or (n) is a number indicating that it is not used, for example “0”
To Therefore, on the magnetic tape 4, the index number data corresponding to the unused subcode in the index number frame is also "0". These data can be anything as long as it can be identified that they are not used.

Recording data on the magnetic tape to be driven traveling case of reproducing the magnetic tape 4 heading number frame is recorded as described above is detected by the reproduction system _2-2, it is reproduced by the reproduction signal processor 8. That is, the detected audio data is reproduced, demodulated, converted into an analog signal, and supplied to the output terminal OUT.

The subcode frame and the heading number frame detected is also reproduced in the same manner, the sub-code signal regenerator _8-1
Demodulated by. The demodulated sub-code A, B, ..., respectively N subcode indicator 9 _1, 9 _2, ..., are displayed are supplied separately to each to 9-n. The demodulated index number frame is supplied to the index number detection circuit 10 to detect whether or not the index number data is "0". When it is detected that the heading number data is "0", the heading number detecting circuit 10
Subcode indicator corresponding from _{9- 1, 9- 2, ...,} 9-n
Is supplied with an off control signal. It was Although subcode indicator control signal connexion off is supplied 9- _1, 9 _2, ..., 9
No subcode is displayed by n. Corresponding subcode indicator 9 _1, 9 _2, from heading number detecting circuit 10 when the heading number data is not "0" Moreover ..., the control signal of ON is supplied to the 9-n. Was Although subcode indicator control signal connexion on is supplied _{9- 1, 9- 2, ...,} 9-n
Displays the subcode. The While connexion subcode indicator _{9- 1, 9- 2, ...,} 9-n when the sub-code is displayed on, it indicates that those functions may exert sub code being displayed become.

Control signal on-off from the heading number detecting circuit 10 in the same manner also the lamp 11 _1, 1 _2, ..., is supplied to the 11-n. Therefore, the lamp corresponding to the function of the sub code that can be operated accordingly
_{11- 1, 11- 2, ...,} 11-n is illuminated, the control signal of the on-off from Likewise heading number detection circuit 10 that effect will be displayed to constitute a switch group 12 It is supplied to each switch to control the opening / closing of the switch. Therefore, the switch corresponding to the transmitted subcode is turned on and the operation input of the system controller 11 is output via the switch turned on, and the function of the transmitted subcode is activated.

During after-recording, the control signal output from the index number storage circuit 15 is supplied to each switch forming the switch group 12 to turn on / off each switch.
Off is controlled. Therefore, the switch corresponding to the rewritable sub-code is controlled to the ON state, and the output of the manual setter of the system controller 11 is output via the switch that is in the ON state, and the function of the corresponding sub-code is changed. Will work. This may if already possible rewrite only the sub-code of the contents of the same kind that is recorded on the magnetic tape in the after-Les Corde queuing corresponds to rewritable subcode manual setting unit 13 _1, ..., 13 n
The corresponding switch in the switch group 12 is controlled by the control signal from the index number storage circuit 15 so that only the switch number is valid.

In the above, the sub-code indicator 9 _1, 9 _2,
..., and 9-n, the lamp _11, 11- _2, ..., may be filed only illustrated but either the case of displaying the function of the subcode which can exert in One Manzanillo and 11-n.

Also, an example has been described in which the ON / OFF control signal from the heading number detection circuit 10 is supplied to the switch group 12 to control each switch of the switch group 12 by the control signal.
Stopping the supply of the on-off control signal to the subcode indicator 9 ₁ appears, 9 _2, ..., 9-n or lit lamp, 11- _1, 11- _2, ..., 11- It is also possible to manually control all or part of the switches corresponding to n to be in the ON state and select a part of the sub-codes that can be activated.

Further, in the above-described embodiment of the present invention, the case where the index number frame is independently provided is illustrated.
As shown in 1.2, 2.2, ..., N.2, heading number data (a), (b) is provided between the synchronization signal in the sub-code frame and the heading number data (a), (b), ..., (n). , ..., (n) may be provided with list data, and in this case, the list data is always reproduced by reproducing the subcode.

The While connexion Yotsute subcode indicator 9- 1 playback result of the list _data, ..., 9-n or lamp 11 _1, ..., 11
If -n is turned on, the operation is similar to that of the above-described embodiment of the present invention.

In the above description, the sub-code is also the recording system 2 ₁
A case has been exemplified to be processed through the via and reproducing system 2 _2, further subcode frame signal generator signal from 1- _one subcode signal regenerator _8-1 manually setting device 14
It may be configured such that it is directly supplied according to an instruction from _-1 , ..., Or 14-n, or is controlled not to be directly supplied.

Further, in the above description, the subcodes are described as A, ..., N, but the types of subcodes are not limited to 14 types of A ,.

(Effects of the Invention) As described above, according to the present invention, at the time of recording, an index number frame to which index number data corresponding to the content of the selected subcode in a one-to-one relationship is formed and recorded, During playback, a subcode that can be used by displaying subcodes that can be used according to the index number data read from the index number frame and performing processing corresponding to the subcode corresponding to the read index number data. There is an effect that the correspondence relation of the subcodes becomes clear when the data is reproduced by the magnetic recording / reproducing apparatus which can easily understand the function and cannot handle all the subcodes recorded on the recorded magnetic tape.

[Brief description of drawings]

FIG. 1 is a block diagram of a magnetic recording / reproducing apparatus to which an embodiment of the present invention is applied. FIG. 2 is a diagram showing an example of a subcode format and a heading number subcode format. FIG. 3 is a diagram showing another example of the sub-code format. 1 ...... recording signal processing apparatus, _1-1 ...... subcode frame signal generator, _2-1 ...... recording system, 4 ...... magnetic tape,
_{5- 1, ..., 5-n} ...... subcode signal generator, 6 ...... control circuit, 7 ...... heading number editing circuit, 2-2 _...... reproducing system,
8 ...... reproduction signal processing apparatus, 8-1 _...... subcode signal regenerator, _9-1, ..., 9-n ...... subcode display, 10 ...... heading number detecting circuit, 11 ...... system controller 11 −
₁ ..., 11-n ... Lamp, 12 ... Switch group.

Claims (2)

[Claims] 1. A heading number frame to which heading number data corresponding to a selected subcode in a one-to-one correspondence is formed and recorded during recording, and is read from the heading number frame during reproduction. A sub-code transmission / processing method in a magnetic recording / reproducing apparatus, characterized in that usable sub-codes are displayed by the heading number data and the processing corresponding to the sub-code corresponding to the read heading number data is performed. 2. The read headline in the display means provided for each subcode that can be handled by the magnetic recording / reproducing apparatus is the processing corresponding to the subcode corresponding to the read headline number data. The subcode transmission / processing method in the magnetic recording / reproducing apparatus according to claim 1, wherein the display is a display of a display unit corresponding to the subcode corresponding to the number data.