JPS613383A - After recording system in magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To make after recording of a subcode easy and sure by lighting up a display means according to the subcode that makes 1:1 correspondence with an identifying code based on said code reproduced from a magnetic tape. CONSTITUTION:Identifying codes reproduced from a magnetic tape 4 are detected by an index number detecting circuit 10. Subcode indicators 911, 9-2 of subcodes that makes 1:1 correspondence to the identifying codes through the detecting circuit 10 are lit up, and the kind of subcode to be recorded is confirmed. On the other hand, an index number storing circuit 15, corresponding indicator lamps 11-1, 11-2, a group of switches for setting etc. are controlled by the circuit 10, and after recording of subcodes is made easily and surely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an after-recording method in a magnetic recording and reproducing apparatus for recording and reproducing digitized audio signals (referred to as audio data).

(Background of the Invention) In this specification, after-recording refers to replacing a new content by erasing a part of a previously recorded subcode and re-recording it. - A magnetic recording and reproducing device that records and reproduces audio data is configured to record and reproduce subcodes in addition to audio data, thereby performing processing according to the information carried by the subcodes.

Subcodes include, for example, a song number code that indicates the number of a song, a time code that indicates the elapsed time of an area recorded on a magnetic tape, or the elapsed time of one song, and automatic reversal and playback at a predetermined position on the magnetic tape. , mechanism control subcodes for controlling mechanisms such as fast forward, search, and stop.

It is desirable that these subcodes can be rewritten as desired.

(Object of the Invention) The present invention has been made in view of the above, and an object of the present invention is to provide an after-recording method in a magnetic recording/reproducing device, which allows sub-codes to be easily after-recorded as desired.

(Summary of the Invention) The present invention provides an instruction means for instructing the type of subcode to be after-recorded in a one-to-one correspondence with the type of sub-code, and for making the type of sub-code specified by the instruction means after-recorded. and a recording means, for determining the identification code obtained by reproducing a magnetic tape on which identification codes are recorded in one-to-one correspondence with the types of subcodes, and display provided corresponding to the types of subcodes. The present invention is characterized in that the display means corresponding to the determined identification code in the means is lit to indicate that the after-recording operation is possible.

(Example of the invention) The present invention will be explained below using 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 and converted into audio data, which is sequentially supplied to the recording system 2-1 including a magnetic head in accordance with the clock signal, and is then sent to the tape running drive device. 3 is recorded on the magnetic tape 4 which is being run by the magnetic tape 4.

5-1, 5-2. ．． 5-n are subcodes A and B.

This is a subcode signal generator that generates subcodes A, N, and the generated subcodes are, for example, A is a track number code, B is a time code, C is a mechanism subcode, etc., and hereinafter referred to as subcodes A, B. , , , , N are associated with heading number data (a), (b), . . . , (n).

The subcode signal generator 5 is activated by the signal from the control circuit 6.
1 T 5 “H”” + “” is the subcode A, B, ., N and the corresponding heading number data (al
, (b), . . . (n) are generated. The subcodes and headers generated from the subsignal generators 5-1.5-2, . . . , 5-n are supplied to 1.1, 1.2,
・As shown in n and l, for example, a subcode frame consisting of a data string to which a synchronization signal (SYN) and an error detection code (CRC) are added is generated, and is sequentially supplied to the recording system 2-1 according to a clock signal to be magnetically recorded. It is recorded on tape 4 in the same way as audio data. In addition, the heading number corresponding to the subcode is supplied to the heading number editing circuit 7 and
As shown in 1, the heading number data (a) and (b).

..., perform editing to arrange in the order of (n). The heading number edited by the heading number editing circuit 7 is supplied to the subcode frame signal generator 1-1, and as shown at n+1 in FIG.
A subcode header number frame consisting of a data string to which C) is added is generated, and is sequentially supplied to the recording system 2-1 in accordance with a clock signal to be recorded on the magnetic tape 4 in the same manner as audio data.

Note that the heading number data p (a), (b), . . . , (n) in the subcode heading number frame are the heading number data (a
), (b),..., (n) need not be exactly the same as the heading number data (a).

It may be a code corresponding to each of Φ) and -(n) separately. The control circuit 6 connects manual setting devices 13-1, 13-2, . ..., or 13-
Controlled by n.

Further, subcode signal generators 5-1 and 5-2 are not used when subcodes are not used. . . , or 5-n, manual setting devices 13-1, 13-2.・Or give instructions from 13-n. Sub codes A, B, which are not used due to this instruction,
・, 塘 or N is the subcode frame signal generator 1-
1 is not supplied. At the same time, the heading number editing circuit 7
Heading number data corresponding to subcodes not used for
a) , (b) , .

or (n) is not provided. As a result, (n
The heading number frame of -1-i) becomes heading number data (a), (b), or (n) or 0 corresponding to unused subcodes A, B, . . . , or N.

In addition, the heading number (n+1) at (n+1) in Figure 2
) is the heading number of the heading number frame, and during playback, this heading number (n+1) is detected and the heading number frame is
recognizes that it is a frame.

The recording timing generator 1-2 includes a timing generation circuit that generates the magnetic tape running time from the position where the frame synchronization signal is recorded to the position where the subcode is recorded, and receives the after-recording signal from the system controller 11. In response, the manual setting device 13-s is set to the after-recording mode and activates a timing generation circuit corresponding to a subcode stored in a heading number storage circuit 15 to be described later, and is set via the switch group 12. , 13-2, . . . , or 13-n is supplied to the control circuit 6 and the recording timing generator 1-2, and the subcode signal generator 5- specified by the subcode designation signal is supplied to the control circuit 6 and the recording timing generator 1-2. 115-
21"'l or 5-n to new subcode A, B
, .
Magnetic tape 4 determined by the timing generation circuit
A new subcode A, B, -, or N is recorded at the upper position.

Further, in the reproduction example, recorded data on the recorded magnetic tape 4 is detected by a reproduction system 2-2 including a magnetic head, and is supplied to the reproduction signal processing device 8. The detected data supplied by the reproduction signal processing device 8 is reproduced, and the reproduced audio data is converted into an analog signal and supplied to the output terminal OUT. The subcode frame reproduced by the reproduction signal processing device 8 is supplied to a subcode signal regenerator 8-1 in the reproduction processing device 8 and demodulated. Demodulated subcodes A and B.

, N are subcode indicators 9-1, 9=2°・,
9-n. Further, the reproduced heading number frame is supplied to a heading number detection circuit 10 to detect each heading number data (a), (b), . . . , (n). Heading number detection circuit 1 Detected heading number data (a)
, (b) Output an on/off control signal corresponding to the contents of , . . . , (n). The control signals from the heading number detection circuit 10 are sent to the corresponding subcode display 9-1.
．． 9-2. , 9-n, and a system controller 11 provided to perform processing corresponding to the subcode.
A lamp 11-1 provided corresponding to the functions that can be processed,
11-2, . . , 11-n and manual setting devices 13-1, 13-2 provided in the system controller 11.・
- A switch group 121C that receives the outputs of the switches 13-H and 13-H separately.

In addition, manual setting device 13-1.13-2. ..., 13-n
are provided corresponding to the functions that can be processed by the system controller 11. For example, when searching by song number, the song number is set by the manual setting device 13-1.

In addition, the system controller 11 has a manual setting device 14-1.
, 14-2, . . , 14-n. Manual setting device 14-1. . . , 14-It is used to operate the system, and instructs, for example, recording operation, reproducing operation, fast-forward operation of magnetic tape, after-record operation, etc.

A signal representing the state of the on/off control signal corresponding to the contents of the heading number data (a), (b), . . . , (n) output from the heading number detection circuit 10 is stored in the heading number storage circuit 1'. 5 and store it. The heading number storage circuit 15 is connected to the manual setting device 14-1. -, or 14-n
The stored contents are output to the switch group 12 only when an after-recording instruction is given by the switch group 12.
Controls the on/off of each switch.

Note that each switch in the switch group 12 is used when the system is in the recording mode, that is, when the manual setting device 14-1.・
, or by a recording mode instruction signal from 14-n.

In one embodiment of the present invention configured as described above, in the recording mode, the audio signal d supplied to the input terminal IN is supplied to the recording signal processing device 1, converted into audio data, and sent to the recording system 2-1. The information is recorded on a magnetic tape 4 that is supplied and driven to run by a tape running device 3.

On the other hand, the subcode A is output from the subcode signal generators 5-1, 5-2, . . . , 5-n by the signal from the control circuit 6.
, B , , , .

N and heading number data (a), (bl, , (n
) is output, and the subcode frame signal generator 1-1
1.1 , 2.1 , . . , 0.1 in Figure 2
The subcode frame shown in is generated and recorded on the magnetic tape 4 via the recording system 2 together with the audio data. Subcode signal generator 5-1, 5 21”'?5-
Some of n are supplied with data from outside.

Subcode signal generator 5-1.・The header number data (a), (b), . n- in Figure 2
)-1 is generated and recorded on the magnetic tape 4 via the recording system 2-1 together with the audio data and subcode frame.

When there is a subcode that is not used, the unused subcode A, B, . b)
,..., or (n) is set to a number indicating that it is not used, such as 0. Therefore, on the magnetic tape 4, the heading number data corresponding to unused subcodes in the heading number frame is also 0. Any data may be used as long as it can be identified that it is not being used.

When reproducing the magnetic tape 4 on which the header number frame is recorded as described above, the recorded data on the running magnetic tape is detected by the reproducing thread 2-2 and reproduced by the reproducing signal processing device 8. Ru.

That is, the detected audio data is reproduced, demodulated, converted into an analog signal, and supplied to the output terminal OUT.

The detected subcode frame and heading number frame are also reproduced in the same way, and the subcode signal regenerator 8-1
It is demodulated by Demodulated subcodes A, B, . . .
N are subcode display devices 9-1, 9-2, . 9
-n separately and displayed. Further, the demodulated heading number frame is supplied to a heading number detection circuit 10, and it is detected whether the heading number data is O or not. When it is detected that the heading number data is 0, the heading number detection circuit 10 displays the corresponding subcode display 9-1, 9-2. ..., 9-n are supplied with an OFF control signal. Therefore, the subcode display devices 9-1, 9-2, . Display under the sub-knee by 9-n is not performed. If the heading number data is not O, the heading 2 number detection circuit 10 to L corresponding subcode display 9-1.9-2. ..., 9-n
An on control signal is supplied to the Therefore, the subcode display 9-1.9-2. to which the ON control signal is supplied.・
. . , when a subcode is displayed at 9-n, this indicates that the function of the displayed subcode can be activated.

Similarly, the on/off control signals from the heading number detection circuit 10 are the lamps 11-1, 11-2, .

11-n. Therefore, the lamps 11-1, 11-2° . . . correspond to the functions of the subcodes that can be activated.
, 11-n will light up to indicate that.

Similarly, on/off control signals from the heading number detection circuit 10 are supplied to each switch constituting the switch group 12 to control opening and closing of the switches. Therefore, the switch corresponding to the transmitted subcode is turned on, and the operation input of the system controller 11 is outputted via the switch that is turned on, so that the function of the transmitted subcode is activated. Similarly, the on/off control signal from the heading number detection circuit 10 is also supplied to the heading number storage circuit 15, and a signal representing the state of the on/off control signal is stored in the heading number storage circuit 15.

Therefore, the heading number storage circuit 15 stores the type of subcode that has been transmitted.

Manual setting device 14-1. ... or 14-n, the storage control signal output from the index number storage circuit 15 is supplied to each switch making up the switch group 12, and the on/off of each switch is controlled. Therefore, the switch corresponding to the rewritable subcode is controlled to be in the on state.

On the other hand, manual setting device 14-1. ... or 14-n, the recording timing generator 1-2 is set to the after-recording mode, and only the timing generating circuit that receives the storage control signal from the header number storage circuit 15 is activated. Controlled to active state. Therefore, only the timing generation circuit corresponding to the transmitted subcode, that is, the subcode that can be replaced, is in operation. Next, manual setting device 13-
1. . . , or 13-n specifies the type of subcode to be after-recorded. In this case, the display lamp 11-1. . . , 11-n indicate the types of subcodes that can be used, and there is no possibility of mistakenly identifying a subcode that can be used after recording. Manual setting device 13-1. . . , or a signal indicating the type of subcode to be after-recorded by 13-n is supplied to the control circuit 6 and the recording timing generator 1-2. Therefore, the control circuit 6 causes the corresponding subcode signal generator 5-11''l or 5-n to output the subcode and heading number data. The timing generation circuit corresponding to the code is selected, and the new subcode and header data from the subcode signal generators 5-1... or 5-n are after-recorded. This is done in the form of a subcode frame by the signal generator 1-1.The position on the magnetic tape is determined by the timing generation circuit from the frame synchronization signal position to the position corresponding to the subcode to be recorded, that is, the source to be rewritten. This is the position where the subcode frame was recorded.

Furthermore, as mentioned above, the switches constituting the switch group 12 that correspond to rewritable subcodes are turned on in the same manner as the content already recorded on the magnetic tape during after-recording. This is because it is often the case that only the subcodes are rewritable, and only the subcode instruction signals corresponding to the rewritable subcodes are made valid. This prevents erroneous rewriting even if a non-rewritable subcode is erroneously specified by the manual setting devices 13-IP, . . . , f, or 13-n.

In addition, in the above, subcode display 9-1+"'+
9-n and the lamps 11-1, . . . , 11-n have been illustrated to display the functions of the subcodes, either one of them may be used.

In addition, although the case where the on/off control signal from the heading number detection circuit 10 is supplied to the switch group 12 and each switch of the switch group 12 is controlled by the control signal has been exemplified, the on/off control signal to the switch group 12 is The signal supply is stopped and the displayed subcode display 9-1, 9-2, -, 9-n or lamp 11-1゜11-2? . . , 11-n may be manually turned on in whole or in part to select a part of the subcodes that can be activated.

In addition, in the embodiment of the present invention described above, the case where the heading number frame is provided independently has been exemplified.
．． 2, 2.2. ..., synchronization signal and heading number data (a) in the subcode frame as shown in 11.2,
(b) Heading number data (a
).

It is also possible to provide list data corresponding to (b), . Then, depending on the list data playback result, the subcode display 9-1. ...
, 9-n or lamp 11-1. ．． If 11-n is turned on, it operates in the same manner as the above-described embodiment of the present invention.

In addition, in the above explanation, the subcodes are A, .

Although the explanation was given as N, the type of subcode is A,...

It is not limited to the 14 types of N.

(Effects of the Invention) As explained above, according to the present invention, the types of subcodes already recorded on the magnetic tape are clearly indicated by the display rate stage, so it is easy to know the types of subcodes that can be after-recorded. be able to.

Furthermore, since there is a one-to-one correspondence with the type of subcode, and the instruction means for instructing the type of subcode to be after-recorded and the display means for displaying the type of subcode correspond, Only the subcodes of the same type as the contents can be rewritten, allowing for easy after-recording without errors.

[Brief explanation 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 the format of a subcode frame and the format of a subcode heading number frame. FIG. 3 is a diagram showing another example of the format of a subcode frame. 1... Recording signal processing device, ■-1... Subcode frame signal generator, 1-2 Recording timing generator,
2-1-recording system, 2-2...reproduction system, 4 magnetic tape,
5-1. −． 5-n subcode signal generator, 6 control circuit, 7 heading number editing circuit, 8 reproduction signal processing circuit, 8-1 subcode signal regenerator, 9-1. −． 9-n
---Subcode display, 1o heading number detection circuit,
11 System controller, 1l-IL, 11-n
lamp.

Claims (1)

[Claims] A sub-code comprising an instruction means for indicating the type of sub-code to be after-recorded in a one-to-one correspondence with the type of the sub-code, and a recording means for after-recording the type of sub-code instructed by the instruction means. The identification code obtained by reproducing the magnetic tape on which identification codes are recorded in one-to-one correspondence with the code types is determined, and the identified identification codes are displayed in the display means provided corresponding to the sub-code types. An after-recording method in a magnetic recording/reproducing device, characterized in that a display means corresponding to the after-recording operation is displayed by lighting up a display means corresponding to the after-recording operation.