JPS634478A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To discriminate the content of a magnetic tape without using other recording means by providing a memory storing one field or one frame of picture information and address information, a memory control circuit controlling the memory, a control duty discrimination circuit and a means recording memory content on a magnetic tape. CONSTITUTION:In retrieving the tape position, the start of a magnetic tape is reproduced to display a video signal to a TV receiver 8 and to store it in a memory and the address of the next tape position retrieval is set by picture information and address information to apply high speed drive. When the set address is equal to address information recorded on the magnetic tape, a control section 2 brings the mode into the reproducing state, a reproducing signal changeover switch 11 is switched at the reproduction state and an output signal from a VRT allows a video signal outputted from a reproducing circuit 5 to be displayed on a TV receiver 8B. In retrieving the tape position attain, the reproduction signal changeover switch 11 is switched to display the video signal from a memory circuit 9 on the TV receiver 8, thereby setting the address of the tape position restrieval for high speed drive. A display as shown in figure is given again to the TV receiver 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention converts address information recorded on a magnetic tape and image information stored in a memory into a video signal and records it at the beginning of the magnetic tape, for example. The present invention relates to a magnetic recording/reproducing device (hereinafter abbreviated as VTR) such as a video tape recorder that can clearly indicate recorded content and facilitate retrieval of the tape position.

BACKGROUND OF THE INVENTION In recent years, magnetic recording and reproducing apparatuses have had to remember what is recorded on a magnetic tape before searching for a tape position.

An example of the above-mentioned conventional magnetic recording/reproducing device will be explained below with reference to two drawings.

FIG. 3 is a block diagram of a conventional magnetic recording/reproducing device.

In the figure, 1 is an operating section. Reference numeral 2 denotes a control section that inputs commands from the operation section and information from the control duty detection circuit, outputs commands to each circuit, and controls the operation of the VTR. Reference numeral 3 denotes a control duty discrimination circuit which converts the duty, amplifies the recorded control pulse, discriminates the duty, and outputs 2nd address information to the control section 2. Reference numeral 4 denotes a control recording signal processing circuit which converts the control recording signal into a recording signal with a duty ratio changed according to the address information. Reference numeral 5 denotes a reproduction circuit that amplifies the signal reproduced from the head and returns it to the original video signal. 6 is a motor drive servo circuit that drives and controls the traveling mechanism section. 7 is a running mechanism section for running the tape. 8 is a TV receiver.

The operation of the conventional magnetic recording/reproducing apparatus configured as described above will be described below.

When recording, set the address on the operation unit 1 at the tape position you want to detect when starting recording or especially when playing the tape, and press the input button. The button information from the operation unit 1 is transferred to the control unit 2.
is input, and address information is output to the control recording signal processing circuit 4. The control recording signal processing circuit 4 records the control signal obtained by converting the duty of the control recording signal on the magnetic tape according to the address information from the control section 2. To leave recorded address information using other recording means. Next, during playback, address information for the next tape position to be detected is set on the operation unit 1 according to the current tape position and the address information left in the other recording means, and the high-speed search button is pressed. The control unit 2 inputs the address information set from the operation unit 1.

, outputs a command to the motor drive servo circuit so that the traveling mechanism section 7 enters a high-speed traveling state. The control duty discrimination circuit 3 amplifies the control signal even during high-speed driving.
If the second address information is detected by shaping the waveform and determining the duty ratio, the address information is output to the control section 2. The control section 2 compares the set address information with the address information recorded on the magnetic tape, and if they are equal, the traveling mechanism section 7
A command is output to the motor drive servo circuit and the regeneration circuit 5 so that the motor is in the regeneration state. The traveling mechanism section 7 enters a regeneration state, and the motor drive servo circuit 6 controls motors such as a capstan motor and a cylinder motor in accordance with the regeneration control signal. The reproduction circuit 6 amplifies the signal reproduced from the head, returns it to the original video signal, and outputs it from the VTR. This is displayed on the TV receiver 8 to search for the tape position. If no other recording means is available, the magnetic tape is run at high speed from the beginning, and after detecting the tape position of the magnetic tape where the 9th address information is recorded, it is played back for several seconds and then run at high speed again. This operation is repeated until the tape position desired to be searched is terminated, resulting in a secondary operation.

Problems to be Solved by the Invention However, in the above configuration, the address information must be recorded using other recording means, or the tape position can be searched multiple times to find the current tape position and the tape position to be searched. This poses a problem in that it places a burden on the user because he or she must remember the relationships between the two.

In view of the above-mentioned problems, the present invention provides address information and image signals recorded on a magnetic tape without recording address information on another recording means by mounting a memory means for one field or one frame on a VTR. is stored in a memory circuit, and the stored contents of the memory circuit are recorded at the beginning end of the magnetic tape, and even if the magnetic tape is once removed and reinserted, specific parts such as the beginning end of the magnetic tape are reproduced and recorded. The present invention provides a magnetic recording and reproducing device that displays image information and address information on a TV receiver.

Means for Solving the Problems In order to solve the above problems, the magnetic recording/reproducing apparatus of the present invention includes a control recording signal processing means for recording address information by changing the duty ratio of the control signal at an arbitrary position on the magnetic tape. a detection means for detecting the address information during high-speed driving; a memory means for recording one field or one frame of image information and the address information; and a memory means for reproducing the image information each time the address information is detected during high-speed driving. , thinning out the image information and storing it in a part of the memory means.

A control means for causing the memory means to run again at high speed and storing image information of several locations where address information is recorded in the memory means; and a control means for storing the image information and address information stored in the memory means on a magnetic tape for a certain period of time. It is equipped with a recording means for recording.

Operation The present invention uses the above-described configuration to record address information at a tape position desired to be searched during playback.

It performs a high-speed search, thins out the image information at the tape position where the address information is recorded, and stores it, and once the information at several locations has been stored, it is recorded, for example, at the beginning of the magnetic tape, and other recording means can be used. Even if the magnetic tape is not used, and even if the magnetic tape is removed and reinserted, image information and address information of the tape position to be searched will be obtained.

Embodiments Hereinafter, magnetic recording and reproducing apparatuses according to embodiments of the present invention will be described with reference to two drawings.

FIG. 1 shows a block diagram of a magnetic recording/reproducing apparatus according to an embodiment of the present invention. FIG. 2 is a display diagram of the TV screen. In FIG. 1, 1 is an operation section, 2 is a control section,
3 is a control duty discrimination circuit, 4 is a control recording signal processing circuit, 5 is a reproduction circuit, 6 is a motor drive servo circuit, 7 is a traveling mechanism section, and e is a TV receiver, which is the conventional example shown in FIG. It is similar to 9 is A/
This is a memory circuit that can record image information of one frame or one image including D and D/A converters.

Reference numeral 10 denotes a memory control circuit that controls the memory circuit 9, such as where in the memory circuit 9 the image information is stored. Reference numeral 11 denotes a reproduction signal changeover switch for switching between the video signal output from the memory circuit 9 and the video signal output from the reproduction circuit 5. 12 is a recording circuit that converts the video signal into a signal that can be recorded on a magnetic tape and outputs it to the head. Reference numeral 13 denotes a recording/reproduction changeover switch for switching signals during recording and reproduction. Reference numeral 14 denotes a switch for switching recording signals between a video signal from the outside and a video signal from the memory circuit 9.

The operation of the magnetic recording/reproducing apparatus of this embodiment configured as described above will be described below with reference to FIG.

First, an address is set on the operation unit 1 at the tape position at which the tape position is desired to be detected at the time of starting recording or especially during playback, and the input switch is pressed. The control section 2 inputs switch information and address information from the operation section 1 and outputs converted data according to the address information to the control recording signal processing circuit 4. The control recording signal processing circuit 4 records the control recording signal on the magnetic tape according to the conversion data from the control section 2. Address information is recorded on the magnetic tape using the procedure described above. Next, at the time of playback, the high speed search button is pressed on the operation unit 1.

The control section 2 inputs button information from the operation section 1 and outputs a command to the motor drive servo circuit 6 in order to put the traveling mechanism section 7 into a high-speed traveling state. The traveling mechanism section 7 starts traveling at high speed in a sub-loading state.

Even during high-speed running, the control duty determining circuit 3 amplifies and shapes the reproduced control signal to determine the duty ratio, and if address information is present, outputs the address information recorded on the magnetic tape to the control section 2. When the control section 2 receives the address information, it outputs a command to the motor drive servo circuit 6 and the regeneration circuit 6 in order to put the traveling mechanism section 7 into a regeneration state. When the traveling mechanism section 7 enters the regeneration state, the motor drive servo circuit 6 controls motors such as a capstan motor and a cylinder motor in accordance with the regeneration control signal. The reproduction circuit 5 amplifies the signal reproduced from the head, returns it to the original video signal, and outputs it to the memory circuit 9. After the image information is output, the control unit 2 outputs a command to the memory control circuit 1o to store the image information and address information in the memory circuit 9.

The memory control circuit 1o controls the memory circuit 9 so as to thin out and store image information and address information in a portion of the memory circuit 9 in accordance with a command from the control unit 2.

Memory circuit 8 corresponding to the upper left part of the TV screen in Figure 2
to be memorized. - After regeneration for a certain period of time, return to high speed driving state. By repeating the above operation several times, image information at several locations where address information is recorded is stored in the memory circuit 9. The control unit 2 detects whether one file or one frame has been stored in the entire memory circuit or whether all of the magnetic tape has been completed, and when detected, outputs a command to the motor drive servo circuit 6 to return to the beginning of the magnetic tape. do. When the magnetic tape reaches the starting end, the running mechanism section 7 is put into a recording state. In order to record the contents stored in the memory circuit 9 onto a magnetic tape, the memory circuit 9 and the recording circuit 12 are connected by a recording signal changeover switch 14.

A recording/reproduction changeover switch 13 connects the recording circuit 12 and the head to record. Next, when searching for the tape position.

The starting end of the magnetic tape is reproduced, the video signal is displayed on the TV receiver 8 as shown in FIG. 2, and at the same time it is stored in the memory, the address for the next tape position search is set based on the image information and the address information, and the tape is run at high speed. The control section 2 sets the reproduction state when the set address and the address information recorded on the magnetic tape become equal. When the playback status is reached, press the playback signal selector switch 1.
When performing a position search, switch the playback signal changeover switch 11 to switch the video signal from the memory circuit 9 to T.
The tape is displayed on the V-receiver 8, the address for retrieving the tape position is set, and the tape is driven at high speed. A display like that shown in FIG. 2 appears on the TV receiver 8 again. The above operations are performed to search for the tape position.

Effects of the Invention As described above, according to the present invention, there is provided a memory for storing one field or one frame of image information and address information, a memory control circuit for controlling the memory, a control duty determining circuit, and a magnetic tape for storing the contents of the memory. By providing means for recording on the magnetic tape, the content recorded on the magnetic tape can be retrieved once and recorded at the beginning of the magnetic tape, for example, without having to record it on other recording means, and the magnetic tape can be retrieved from the VTR. Even if the magnetic tape is removed, it is possible to obtain the excellent effect that the contents recorded on the magnetic tape can be known by reproducing the beginning of the magnetic tape.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a display diagram of a TV receiver, and FIG. 3 is a block diagram of a conventional example. 1...Operation unit, 2...Control unit, 3...
...Control duty discrimination circuit, 4...
...Control recording signal processing circuit, 6...Reproduction circuit, 6...Motor drive servo circuit, 7
...... Traveling mechanism section, 8... TV receiver,
9...Memory circuit, 10...Memory control circuit, 11...-Reproduction signal changeover switch, 12...-Recording circuit, 13... Recording/playback switch, 14...Recording signal switch, 16/Old...TV screen.

Claims (1)

[Claims] a control recording signal processing means for recording address information by changing the duty ratio of a control signal at an arbitrary position on the magnetic tape; a detection means for detecting the address information during high-speed running; and one field or one frame of image information and the above. a memory means for storing address information; and a memory means for reproducing image information each time the address information is detected during high-speed driving, thinning out the image information and address information at the time of reproduction and storing the thinned-out image information and address information in a part of the memory means, and driving at high speed again. a control means for causing the memory means to store image information at several locations where address information is recorded; and a control means for recording the image information and address information stored in the memory means on the magnetic tape for a predetermined period of time. 1. A magnetic recording and reproducing device comprising a recording means.