JP3379577B2 - Method and apparatus for reproducing information from magnetic tape - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus such as a video tape recorder, and more particularly to a magnetic tape information reproducing method and apparatus for reproducing recorded information on a magnetic tape in an easily viewable manner.

[0002]

2. Description of the Related Art A popular video tape recorder (VT)
In R), when the user operates the reproduction key with the key operation unit, the information recorded on the magnetic tape is reproduced by the operation of the reproduction system and an image is displayed on the screen of the television receiver (TV). According to this VTR, by setting a tape cassette in which information is recorded for a long time on a magnetic tape and operating a play key or a stop key, it is possible to intermittently reproduce information at the convenience of the user. Is. However, if a certain amount of time elapses between the time when the reproduction is once stopped and the time when the next reproduction is performed, the contents of the recorded program or the like that was previously listened to may be forgotten. In this case, the user operates the play key of the key operation unit, operates the rewind key while playing the recording, rewinds the magnetic tape slightly, then stops it at an appropriate position and then operates the play key. By doing so, the image was played back, and the recording was continued to be listened to following the previous scene.

By the way, since it is very troublesome to operate the key operation section many times to reproduce the previous image, it is possible to confirm the content of the recorded image signal without rewinding the magnetic tape. An image signal recording / reproducing apparatus for the above has been proposed (see Japanese Utility Model Laid-Open No. 4-132682). This one has a structure including a recording drum having a recording magnetic head and a reproducing drum having a reproducing magnetic head, and the same magnetic tape is used for the recording drum and the reproducing drum. Is loaded, the image signal is recorded on the magnetic tape by the recording drum, and the image signal recorded on the magnetic tape is reproduced by the reproducing drum.

[0004]

However, the above-mentioned conventional image signal recording / reproducing apparatus has a drawback that the recording drum must be provided in addition to the reproducing drum, and the structure is complicated and the manufacturing cost is high. It was

The present invention was devised in view of the above problems, and an object of the present invention is to provide a magnetic tape information reproducing method and apparatus capable of reproducing recorded information of a magnetic tape in an easy-to-view manner with a simple structure. I am trying.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention provides information on a magnetic tape for controlling the operation of reproducing information recorded on the magnetic tape.
In the information playback method, the key operated by the key operation of the key input means
-When the operation contents are sequentially stored in chronological order and a playback command signal is input by key operation of this key input means
Whether or not the latest key operation content is stored in
If there is the latest key operation content after making a determination,
The latest key operation content of the
It is determined whether the specific conditions of the work are met , and the
Determining that the latest key operation content that satisfies a specific condition exists
If only, with a pre-Symbol magnetic tape rewound by a predetermined amount
It is characterized by performing control to start the reproducing operation after the stop . The invention according to claim 2, Oite the information reproduction method of the magnetic tape, the key input hand
The amount of rewinding of the magnetic tape can be predicted by operating the key of the step.
Therefore, the feature is that it can be set arbitrarily .
The invention according to claim 3 is recorded on a magnetic tape.
Information reproduction of magnetic tape for controlling the operation of reproducing the recorded information
The device outputs a command signal according to the key input operation.
Key input means and the key operation contents of this key input means
From the memory for sequentially storing in time series and the key input means
When the playback command signal is input, the latest
Determine whether the key operation content is stored and store it.
If so, read the latest key operation contents,
The latest key operation content stops after performing the playback operation
Determine whether or not the specified condition that you have operated is met,
It is determined that the latest key operation content that satisfies the specified condition exists.
Only when it is separated, the tape running mechanism should be
After rewinding a certain amount, stop it, and then play
And a control means for performing control for starting
It is a sign. Further, the invention according to claim 4 is the magnetic
The key input means in the information reproducing device of the air tape,
Winding to set the rewinding amount of magnetic tape in advance
Equipped with a rewind amount setting key that outputs a rewind amount setting signal
It is characterized by

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an electrical block diagram showing a schematic configuration of a magnetic tape information reproducing apparatus according to the present invention. This information reproducing apparatus for magnetic tape is applied to a popular video tape recorder (VTR), and each magnetic system of a recording system for recording information on a video tape 1 of a tape cassette and a reproducing system for reproducing this recorded information. Heads 2 and 3, reel motors 6 and 7 on the supply side and the winding side, a reel motor control unit 8 for a servo system, a cassette detection unit 9, a display unit 11, a key operation unit 12, a memory 13, a control unit 14, etc. It is configured with.

The magnetic head 2 for audio reproduction is connected to the audio signal processing unit 4, and the magnetic head 3 for video reproduction is connected to the video signal processing unit 5. The outputs of the video signal processing unit 5 and the audio signal processing unit 4 are supplied to the control unit 14
Respectively connected to. As a result, the information read from the video tape 1 by the magnetic heads 2 and 3 is sent to the audio signal processing unit 4 or the video signal processing unit 5, respectively, and after signal processing is performed, the TV side and the control unit (not shown). 14 is transmitted. In addition, the magnetic head of the recording system,
Although not shown, the control unit 1 is connected via the recording signal processing unit.
It is connected with 4. Each of the reel motors 6 and 7 on the supply side and the take-up side constitutes a tape running mechanism, and rotates forward and backward in response to a command signal from the reel motor control unit 8 to move the video tape 1 in the tape cassette in the feeding direction or Drive in the return direction. The reel motor control section 8 receives a control signal from the control section 14 and controls the supply-side and take-up-side reel motors 6 and 7 to rotate in the forward and reverse directions. The cassette detecting section 9 outputs a detection signal when the tape cassette is set at the cassette insertion position of the VTR main body.

The display unit 11 is provided with a liquid crystal display screen on the front panel of the VTR main body, and receives the display control signal from the LCD controller 10 to operate the key operation unit 1.
The operation contents of 2, the reservation contents, the time, etc. are displayed. The key operation unit 12 includes keys for reproduction, stop, rewind, fast forward, recording, etc. When any key is pressed once, a command signal for executing the corresponding function is output. Further, in addition to these function keys, a time setting key is provided, and when the time setting key is operated, a time setting signal for rewinding the video tape 1 by a predetermined amount can be output. The memory 13 includes a control unit 14
And is used for sequentially storing the operation contents of the key operation unit 12 in time series. It also stores time data that determines the rewinding amount of the video tape 1. The amount of rewinding is set in consideration of a time when the recorded information on the video tape 1 is reproduced and listened to so that it is easy to remember the previously viewed image.

The control unit 14 is a microcomputer that controls the operation of the entire apparatus, and includes a CPU, ROM, and RA.
The audio signal processing unit 4, the video signal processing unit 5, the reel motor control unit 8, the cassette detection unit 9, the display unit 11, the key operation unit 12 and the like are unidirectional or bidirectional according to each function. It is connected. Although not shown, a recording drive circuit that starts / stops recording of the video tape 1, a reproduction drive circuit that starts / stops the reproduction of the video tape 1, and a rewinding that starts / stops the rewinding of the video tape 1. Start fast-forwarding of drive circuit and video tape 1 /
It is mutually connected with the fast-forward drive circuit to stop.
The control unit 14 performs normal recording, reproduction, rewinding, and fast-forward operation control based on the command signal from the key operation unit 12, and when a reproduction command signal is sent from the key operation unit 12. When the contents stored in the memory 13 are checked and the latest key operation contents satisfy a predetermined condition, the operation control for rewinding the video tape 1 by a predetermined amount and then starting the reproduction is also performed.

Next, the operation of the VTR will be described with reference to the flowchart of FIG. However, this VT
It is assumed that the time data for rewinding the video tape 1 by a predetermined amount is stored in the memory 13 in advance by operating the time setting key of the key operation unit 12 in advance. First, when the user turns on the power source power, the control unit 14 determines whether or not there is an input from the cassette detection unit 9 (step S11). At this time, if the tape cassette is set at the cassette insertion position and a detection signal is input from the cassette detection unit 9, the input signal from the key operation unit 12 is waited for and whether or not a reproduction command signal is input. It is determined (step S12). Here, when the reproduction command signal is input, it is determined whether or not the operation signal information is stored in the memory 13 (step S13).

At this time, if the information of the operation signal is not stored in the memory 13, the control unit 14 proceeds to the reproduction start step S16 according to the reproduction command signal and sends the control signal to the reel motor control unit 8. Then, the reel motor control unit 8 rotationally drives the reel motors 6 and 7 on the supply side and the winding side to run the video tape 1 on the feed side. Along with this, the information on the video tape 1 is read by the magnetic heads 2 and 3, and the audio signal is sent to the audio signal processing unit 4 and the video signal is sent to the video signal processing unit 5, respectively. Also, since the outputs of the audio signal processing unit 4 and the video signal processing unit 5 are transmitted to the TV side, immediately after the reproduction key is operated, the sound is emitted from the speaker of the TV and the image is displayed on the screen. Be done.

On the other hand, when the operation signal information is stored in the memory 13, it is determined whether or not the latest key operation information is a predetermined condition (step S14). here,
If any command signal is output from the key operation unit 12 before the current reproduction command and the operation content is stored, it is determined whether or not the operation was stopped after the reproduction operation. When the control unit 14 determines that the memory 13 does not store information satisfying this condition, the control unit 14 proceeds to step S16 of starting reproduction and controls the reel motor control unit 8 to feed and rotate the reel motors 6 and 7. Thus, the recorded information on the video tape 1 is reproduced.

When it is determined that the memory 13 stores the information satisfying the predetermined condition (that is, when the stop operation is performed after the reproducing operation), according to the set time data stored in the memory 13, A tape rewinding control signal is sent to the reel motor controller 8 (step S1).
5). Therefore, the reel motors 6 and 7 on the supply side and the winding side are rotationally driven in opposite directions, and the video tape 1 travels to the return side. Then, when the set time has elapsed, a control signal for starting reproduction is sent to the reel motor controller 8 (step S16). Along with this, the reel motors 6 and 7 are once stopped and then rotated in the feeding direction, so that the video tape 1 runs and the recorded information is reproduced. When the reproduction of information from the video tape 1 is completed (step S17) and the tape end is reached, the control unit stops the operation of each mechanical unit and ends the reproduction.

As described above, when the tape cassette is set in the VTR and the user operates the play key, the play is started as it is when no operation is performed before, and is stopped after performing the play operation before. In this case, the reproduction is started after rewinding by a preset amount. Therefore, when you listen to the next day with the tape cassette that you were listening to before set, or when you set the same tape cassette again and listen to it the next day, you have to take a recording that was suspended halfway. When watching a program for a while, you can watch the continuation after watching the ending part of the previous time by operating the play key once. In the above embodiment, the case of applying to a VTR has been described, but if it is a video / audio device having a function of reproducing the recorded information recorded on the magnetic tape, it can be applied to various AV devices other than the tape recorder. Can be widely adopted.

[0016]

As described above, the magnetic tape information reproducing method according to the first aspect of the present invention is stored in advance when the reproduction command signal is input by the key operation of the key input means. the latest key operation contents are is, line the playback operation
Stop operation after Tsu of certain conditions, which were carried out
See, for starting the playback operation after rewinding the magnetic tape by a predetermined amount, when the recording information of the same magnetic tape at a time such that acousto-optic, Rewind key, a stop key and play key sequence There is no need for complicated operations,
Information that is a predetermined time before the last time playback was stopped is automatically
It is possible to visually hear the information, and it is easy to grasp the following information. Further, in the magnetic tape information reproducing method according to claim 2, the rewinding amount of the magnetic tape can be set in advance arbitrarily.
Since in so that, the unwinding amount of the preference of the user its own
It can be set arbitrarily.

According to a third aspect of the present invention , there is provided a magnetic tape information reproducing apparatus, which is a magnetic tape information reproducing method.
When the playback command signal is input from the key input means, the latest key operation content previously stored in the memory is used to perform the playback operation.
Of certain conditions which were stop operation after performing
The tape running mechanism to rewind the magnetic tape by a specified amount.
The reproduction of information on the magnetic tape according to claim 1 , wherein the reproduction is started after the operation is stopped.
It is possible to surely obtain the same effect as the method. Further, in the information reproducing apparatus for magnetic tape according to claim 4 , the key is the key.
Set the amount of magnetic tape rewind to the input means in advance.
Rewinding amount setting signal for outputting the rewinding amount setting signal
Since it has a constant key, the user can rewind to his or her favorite
The amount can be set arbitrarily.

[Brief description of drawings]

FIG. 1 is an electrical block diagram showing an information reproducing apparatus for a magnetic tape according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining a reproducing operation showing an information reproducing method of a magnetic tape.

[Explanation of symbols]

1 magnetic tape 12 key input means 13 memory 14 Control means

Claims (4)

(57) [Claims] 1. A magnetic tape information reproducing method for controlling an operation of reproducing information recorded on a magnetic tape, the contents of key operations by key operations of a key input means in time series.
Sequentially store and play command signal is input by key operation of this key input means
The latest key operation contents are stored when
Luke performed whether the discrimination, if the latest key operation contents exists, not the latest key operation contents, or JP <br/> constant satisfying performing the stop operation after the reproduction operation If there is the latest key operation content that satisfies the specific condition,
If it is determined only, after a pre-Symbol magnetic tape is stopped rewound by a predetermined amount, <br/> information reproducing method of a magnetic tape and performing control to start the reproducing operation. 2. The operation of the keys of the key input means
Ability to set the rewind amount of magnetic tape in advance
The method for reproducing information from a magnetic tape according to claim 1, 3. An operation for reproducing information recorded on a magnetic tape.
In a magnetic tape information reproducing device for controlling operation, a key input means for outputting a command signal according to a key input operation
And the key operation contents of this key input means are sequentially stored in time series.
When a playback command signal is input from the memory and the key input means
The latest key operation content is stored in the memory.
The latest key if it is stored
Read the operation content and re-create the latest key operation content.
Satisfies certain conditions for performing a stop operation after performing a raw operation
The latest key that meets the above specific conditions
Only when it is determined that the operation content exists, the tape running machine
The magnetic tape was rewound by a predetermined amount.
Control to stop the playback and start the playback operation.
Magnetic tape information reproducing apparatus characterized by comprising: a stage, a. 4. The key input means rewinds a magnetic tape.
A rewinding amount setting signal for setting the winding amount in advance
The rewinding amount setting key for outputting is provided.
Information playback device for magnetic tapes.