JP2906464B2 - Digital magnetic recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital magnetic recording / reproducing apparatus capable of rewriting only subcode information such as a start ID indicating a song head recorded in advance on a recording medium. is there.

2. Description of the Related Art R-DAT, which is an example of a digital magnetic recording / reproducing apparatus,
A subcode such as a start ID and a program time can be recorded together with a PCM audio signal as a main signal. The start ID indicates the beginning of a song, and a high-speed cue search can be performed by determining the start ID during fast-forward or rewind of the tape. Furthermore, an after-recording function that rewrites only the subcode without changing the main signal, and detects the interval between songs in the audio signal when recording or after-recording the main signal. An automatic start ID recording function for recording the start ID upon judging that it is practically used.

Problems to be Solved by the Invention However, the conventional digital magnetic recording / reproducing apparatus has the following problems. As autostart ID tapes recorded using the recording function are shown in Figure 3, the time t ₅ the audio signal is also the beginning of the song a time t ₂ exceeds the detection level between tracks, the beginning of the song it is determined that a t ₆ the time of the start ID is recorded, time t ₆ -
Time of the time t _2, the actual beginning of the song was present prior to the position that has been recorded with the start ID = 1. Therefore, in order to finely match the reproduction start timing after the search, it was necessary to move the start ID forward by the after-recording function.

The most basic way to move the start ID is
In this method, the beginning of the song is repeatedly played back, and the start ID is manually written in synchronization with the rising edge of the playback sound. However, rewriting all start IDs in this way requires a lot of work. As another method that does not require much time, there is a method of unconditionally moving the start ID recorded using the automatic start ID recording function a predetermined time before. However, in this case, the start ID may be written before the start of the reproduction sound, and there is a problem that the music does not start immediately after the reproduction is started from the search end position.

In view of the above problems, the present invention has a function of moving a start ID recorded using an automatic start ID recording function or the like with a new inter-track detection level, or, in addition to the function, a position other than the beginning of a song. With the function of automatically moving only the start ID recorded at the beginning of the song to the position closer to the beginning of the actual song without moving the start ID recorded in the
Another object of the present invention is to provide a digital magnetic recording / reproducing apparatus having a function of moving all start IDs at the same time as a renumbering operation.

Means for Solving the Problems In order to solve the above problems, a digital magnetic recording / reproducing apparatus of the present invention includes a drive system main body including a mechanism for supporting and running a recording medium and a mechanism controller for controlling the mechanism, A signal processing unit that performs signal processing for recording and playback of audio signals and subcode information, and a start that switches between enabling and disabling a function that automatically moves the start ID to the optimal position according to the level of the audio signal An ID move switch, a start ID write switch for instructing the writing of a start ID, and a music interval when the audio signal sent from the signal processing unit is at a certain level for a certain time or more and then at a certain level for a certain time or more. Music interval detecting means for detecting presence, rewind time generating means for generating a time for rewinding the tape, and a signal Start ID discriminating means for reading the presence or absence of a start ID from the subcode information sent from the control section, controlling the mechanism controller and the signal processing section, and detecting a music interval detecting means, rewind time generating means, and start ID discriminating means. When the start ID movement switch is closed and the start ID light switch is detected to be closed, the system controller operates the mechanism controller and the signal processing unit, and The sub-code information sent from the signal processing unit is read by the ID discriminating unit, the presence or absence of the start ID is discriminated, and the tape is wound from the rising position of the start ID = 1 for the time given by the rewinding time generating unit. When playback is started after returning to the original position, and when the interval between songs is detected by Performs writing new start ID by a start ID control unit and said start
If the inter-song detection means cannot detect the inter-song even after the reproduction to the rising position of ID = 1, the start
Start ID from the position where the rising edge of ID = 1 is detected
It has a configuration in which the control means controls so as to newly write the start ID.

In addition, the system controller includes a start ID position storage means, and starts the rising position of the start ID = 1.
The time is stored by the ID position storage means, the tape is rewound from the start of the start ID = 1 at the time given by the rewind time generation means, and then the music is played back to the tape position stored by the start ID position storage means. If the detecting means cannot detect the interval, start from that position
A configuration is provided in which control is performed by the ID control means to newly write the start ID.

A renumber switch for instructing the start of the operation of the renumbering function in which the program number is reassigned in order from the section of the start ID = 1 closest to the beginning of the tape to 1, 2, 3,... When the movement switch is closed and the close of the renumber switch is detected, control is performed so as to perform a renumber operation while performing an operation of moving the start ID closer to the beginning of the music by using the inter-track detection means. It has a configuration.

Operation With this configuration, the digital magnetic recording / reproducing apparatus of the present invention operates the mechanism controller and the signal processing unit when the start ID moving switch is closed and the start ID write switch is closed, and the start ID determining unit The subcode information sent from the signal processing unit is read, the presence / absence of a start ID is determined, and the tape is rewound from the rising edge of the start ID = 1 at the time given by the rewinding time generating means, and then reproduction is started. When the interval between the songs is detected by the interval detecting means, a new start ID is written from that position by the start ID control means. If not detected, start ID =
Since a new start ID is written by the start ID control means from the position where the rising edge of 1 is detected, the start ID can be moved by the new inter-song detection level when the inter-song can be detected, and when the inter-song cannot be detected. Since the start ID is recorded at the previous position, the start ID recorded except for the beginning of the song can be left at the original position without disappearing or moving backward.

When the system controller includes the start ID position storage means, when the start ID recorded at a position other than the beginning of the music is to be moved, the start position of the start ID = 1 is recorded by the start ID position storage means. The tape is rewound from the rising edge of the start ID = 1, the time given by the rewind time generating means, and then the start ID
Even if the music is played back to the tape position stored by the position storage means, the inter-song detection means does not detect the inter-song, so that the start ID control means writes a new start ID from that position and does not move the start ID. Can be done. Then, only the start ID recorded at the beginning of the song is moved to a position closer to the beginning of the actual song.

If the system controller is provided with an number switch for instructing the start of the operation of the renumbering function in which the program number is reassigned to 1, 2, 3,... When the start ID moving switch is closed and the renumber switch is closed, the renumbering operation is performed while performing the function of moving the start ID to the optimum position using the inter-track detecting means.
If the interval between songs can be detected at a time among all the start IDs, the start ID can be moved by the new interval detection level.If the interval between songs cannot be detected, the start ID is recorded at the previous position. The recorded start ID can be left in its original position without disappearing or moving backward.

Embodiment A digital magnetic recording / reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram when the present invention is applied to an R-DAT. Reference numeral 4 denotes a signal processing unit which performs signal processing for recording / reproducing audio signals and subcode information, 7 denotes a subcode encoder which encodes a subcode such as a start ID generated by 27 start ID control means, and 10 denotes a subcode encoder. A sub-code decoder for decoding the reproduced sub-code, a PCM decoder for decoding the reproduced PCM signal, a mechanism for driving the magnetic tape and a rotating head, and a mechanism for controlling the mechanism A mechanism controller, 19 is a start ID move switch for switching the enable / disable of the start ID move function, 20 is a start ID light switch for instructing start of start ID writing, 21 is a renumber switch for instructing start of renumber operation, twenty two
Is a system controller that controls the operation of the entire system in accordance with a command from each switch, 23 is start ID determining means for determining a start ID from subcode information sent from a subcode decoder, and 24 is a start ID determined by start ID determining means. ID storage means for storing the position of the audio signal, 25 is a music interval detection means for detecting a music interval from the level of the audio signal decoded by the PCM decoder of 8, and 26 is a command for rewinding the tape from the start position of the start ID. The rewind time generating means 27 is a start ID control means for controlling writing and erasing of the start ID.

FIG. 1 shows a block diagram of the digital magnetic recording / reproducing apparatus configured as described above, FIG. 2 shows the operation of the system controller 22 in a PAD, and an audio signal and a conventional automatic start ID recording function. Start ID and Auto Start ID Start ID after moving operation
The operation will be described with reference to FIG. 3 and FIG.

The digital signal read from the magnetic tape as a reproduction signal is separated by a separator 9 into an audio signal and a control signal such as a subcode. The audio signal is subjected to deinterleave processing, error correction, etc. by the PCM decoder 8, converted to an analog signal by the DA converter 11, amplified to the required level by the output amplifier 12, and output to the output terminal.
Sent to 13. The subcode is demodulated by the subcode decoder 10 into a signal such as a start ID and a program time.

For example, as shown in FIGS. 3A and 3B, it is assumed that there is a tape on which a start ID has already been recorded by the automatic start ID recording function. But the time t ₅ to the audio signal to the beginning of the song is the time t ₂ exceeds songs between the detection level of the automatic start ID recording, the start ID to determine the beginning of the song is recorded the time t ₆ and time t ₆ −time t ₂
The rise of the start ID is recorded at a position delayed from the actual beginning of the music by the time indicated by. Therefore, in order to more accurately match the playback start timing after the search,
The ID will be moved forward by the dubbing function. First, a case where the inter-song detection level is set to a value lower than the detection level at the time of automatic start ID recording will be described.

After searching for this song, the start ID move switch 19 is closed and the start ID light switch 20 is closed. The system controller 22 detects this, sets the submode to S1, and executes the start ID transfer module shown in the PAD of FIG. 2 until the submode becomes S5. When the sub mode is S1, the mechanism controller 18 and the signal processing unit 4
Set to REW mode. Then, the sub-code information sent from the sub-code decoder 10 is read by the start ID determining means 23 for determining the presence or absence of the start ID, and when the fall of the start ID is detected, the rewind time generating means 26 is activated. When the time given by the rewinding time generating means 26 has elapsed, the sub mode is set to S2 (time t ₀ ).
When the sub mode is S2, the mechanism controller 18 and the signal processing section 4 are set to the PLAY mode. And setting a sub-mode to step S3 detects between songs between songs detecting means 25 at time t _1. Then, when the sub-mode is S3, beyond audio signal tracks between the detection level when the set ID movement to a value lower than the detection level of the automatic start ID recording at time t _3, the rise of the music at the time t ₄ Is determined,
Set the sub mode to S4. When the sub mode is S4, the start ID control means 27 newly starts from that position
An ID is written for 9 seconds, and then a command is issued to the subcode encoder 7 to erase the start ID for 4 seconds. When the movement of the start ID is completed, the sub mode is set to S5. In this way, the start ID can be automatically moved to a position closer to the beginning of the music as shown in FIG. 3 (c).

Next, for the second embodiment of the present invention, the PA of FIG.
This will be described with reference to D. Since the configuration shown and described in FIG. 1 is the same, a detailed description thereof will be omitted.

For example, as shown in FIGS. 4A and 4B, when the start ID is already recorded by the automatic start ID recording function, but the audio signal of the inter-song portion does not exceed the inter-song detection level, or A case in which there is no space between the songs before the start ID because the start ID is manually recorded in the middle of the song will be described. The same operation as in the above example is performed until the sub mode becomes S2. When the sub mode is S2, the mechanism controller 19 and the signal processing section 4 are set to the PLAY mode. When the rising position of the original start ID (time t _'3) audio signal does not exceed the detection level between tracks until, sets the sub-mode to S4. Then, similarly, the start ID is written in the sub mode S4. In this way, the start ID is rewritten at the same position as the original start ID as shown in FIG. 4 (c).

As described above, according to the present embodiment, it is possible to prevent the start ID recorded before the beginning of the music from being moved further forward. Also, the start ID recorded in the middle of the song can be kept unchanged.

Next, a third embodiment of the present invention will be described with reference to the PAD of FIG. Note that the configurations shown and described in FIGS. 1, 3 and 4 are the same, and detailed description thereof will be omitted.

In this embodiment, the control operation by the 23 system controllers is different from the above-described embodiments, and this point will be described in detail with reference to the PAD in FIG.

For example, FIGS. 3 (a) and (b) or FIG. 4 (a)
As shown in (b) and (b), it is assumed that there is a tape on which a start ID has already been recorded by an automatic start ID recording function or the like.
Therefore, in order to more accurately match the reproduction start timing after the search, all start IDs are moved forward by the after-recording function. Start ID move switch 19
Is closed and the renumber switch 21 is closed. The system controller 22 detects this, sets the main mode to M1, and executes the start ID transfer module represented by the PAD in FIG. 5 until the sub mode becomes S5. When the main mode is M1, the mechanism controller 18 and the signal processing unit 4 are set to the REW mode. Then, when the tape is rewound to the beginning, the main mode is set to M2. Main mode is
When M2, search for the next song. And the start of the next song
When the ID is entered, the main mode is set to M3. When the main mode is M3, the PNO for renumbering is set, and the sub mode is set to S1.
Call the move module. When it is determined that the sub mode of the start ID moving module is S5 and the movement of the start ID is completed, the main mode is set to M2 and the same operation is repeated. When the main mode is M2, the main mode is set to M4 at the end of the tape. In this way, while performing the renumbering operation, the start ID between the songs on the tape is moved closer to the beginning of the song, and the start ID at which the audio signal of the inter-segment portion does not exceed the inter-song detection level Alternatively, even if the start ID is manually recorded in the middle of the song, and the start ID has no inter-songs before the start ID, the start ID does not disappear or move backward. Furthermore, even if renumbering is repeated, the start ID does not continue to move forward more than necessary.

Also, by closing only the renumber switch 21,
Similar operations may be performed.

Effect of the Invention As described above, when the start ID write switch is closed while the start ID movement switch is closed, the start time provided by the rewind time
When the tape is rewound from the rising edge of ID = 1, the reproduction is started, and when the interval between the songs is detected by the interval detecting means, a new start ID is written from that position by the start ID control means, and the start ID = 1. If the inter-song detecting means cannot detect the inter-song even if the inter-song detecting means has played back up to the rising position, the start ID control means writes a new start ID from the position where the rising of the start ID = 1 is detected. When it is completed, the start ID can be moved by the new track detection level, and when the track gap cannot be detected, the start ID is recorded at the previous position. You can leave it in its original position without moving it.

When the system controller includes the start ID position storage means, when the start ID recorded at a position other than the beginning of the music is to be moved, the start position of the start ID = 1 is stored in the start ID position storage means. Rewinds the tape from the rise of the start ID = 1, the time given by the rewind time generating means, and thereafter the start ID
If the inter-song detection unit does not detect the inter-song position even after playback to the tape position stored by the position storage unit, the start ID control unit writes a new start ID from that position, so the start ID is not moved. I can do it. Then, only the start ID recorded at the beginning of the song is moved to a position closer to the beginning of the actual song.

If the system controller has a renumber switch for instructing the start of the operation of the renumbering function in which the program number is reassigned to 1, 2, 3,... When the start ID moving switch is closed and the renumber switch is closed, the renumbering operation is performed while performing the function of moving the start ID to the optimum position using the inter-track detecting means.
If the start interval can be detected at a time among all the start IDs at once, the start ID can be moved with the new inter-track detection level, and the start ID or the start position of the start signal whose audio signal in the inter-segment portion does not exceed the inter-song detection level. Start ID with no inter-song before the start ID because the start ID was manually recorded on the way
Even if there is a mixture of, the start ID will not be lost or moved backward. Furthermore, even if renumbering is repeated, the start ID does not continue to move forward more than necessary.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an R-DAT according to an embodiment of the present invention,
FIG. 2 is a PAD diagram of the same operation, FIGS. 3 and 4 are timing diagrams of the same operation, and FIG. 5 is a PAD diagram of the other embodiment. 1 ... input terminal, 2 ... input amplifier, 3 ... AD converter, 4 ... signal processing unit, 5 ... PCM encoder, 6 ...
Mixer, 7: Subcode encoder, 8: PCM decoder, 9: Separator, 10: Subcode decoder,
11 DA converter, 12 Output amplifier, 13 Output terminal, 14 Recording amplifier, 15 Recording / playback switching means, 16 Reproduction amplifier, 17 Mechanism, 18 Mechanism controller, 19 …… Start ID move switch, 20 …… Start ID light switch, 21 …… Renumber switch, 22
... System controller 23... Start ID discriminating means 24... Start ID position storage means 25... Music interval detecting means 26... Rewinding time generating means 27.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor ▲ Isao Yoshi ▼ 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-64-46282 (JP, A) 63-204561 (JP, A) JP-A-1-140448 (JP, A) JP-A-2-306455 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G11B 15 / 087 G11B 27/28

Claims (3)

(57) [Claims] 1. A drive system main body including a mechanism controller for controlling a mechanism for supporting and running a recording medium, a signal processing unit for performing signal processing for recording and reproducing audio signals and subcode information, A start ID move switch for enabling / disabling a function for automatically moving a start ID to an optimum position in accordance with an audio signal level; a start ID write switch for instructing writing of a start ID; When the audio signal sent from the unit is at or above a certain level for a certain period of time and then at or above a certain level for a certain period of time, a song interval detecting means for detecting the presence of a song interval, and a rewind time for generating a time to rewind the tape Generating means; and a start ID determining means for reading the presence or absence of a start ID from the subcode information sent from the signal processing unit. And a system controller that controls the mechanism controller and the signal processing unit, wherein the system controller is configured to control the mechanism controller when the start ID moving switch is closed and the start ID light switch is closed. Operate the signal processing unit and read the subcode information sent from the signal processing unit by the start ID determination unit,
When the presence / absence of a start ID is determined, the tape is rewound from the start position of the start ID = 1 for a time given by the rewinding time generating means, and then the reproduction is started. When a new start ID is written from the position by the start ID control means, and when the inter-song detection means cannot detect the inter-song even if the inter-song detection means cannot reproduce the start ID, the start ID = Start from the position where the rising edge of 1 is detected by the start ID control means
A digital magnetic recording / reproducing apparatus which controls to write an ID. 2. The system controller includes a start ID position storage means, and stores the start position of the start ID = 1 by the start ID position storage means, and stores the start ID = 1 for the time given by the rewind time generation means. When the tape is rewound from the rising position of the tape, and the inter-song detecting unit cannot detect the inter-song even if it is reproduced to the tape position stored by the start ID position storing unit, a new start is performed by the start ID control unit from that position. 2. The digital magnetic storage / reproducing apparatus according to claim 1, wherein control is performed to write an ID. 3. A system controller comprising a renumber switch for instructing the start of operation of a renumbering function in which program numbers are reassigned to 1, 2, 3,... Sequentially from the section of the start ID = 1 closest to the beginning of the tape. When the start ID movement switch is closed and the renumber switch is detected to be closed, the renumbering operation is performed while performing an operation of moving the start ID forward so as to be closer to the beginning of the music using the inter-music detection means. 3. The digital magnetic storage / reproducing apparatus according to claim 1, wherein the digital magnetic storage / reproducing apparatus is controlled to perform the following.