JPS632186A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To display image information and address information of a tape position desired to be retrieved on a TV receiver by providing a memory means for one field or one frame to a VTR. CONSTITUTION:Address information from an operating section 1 is inputted to a control section 2, a control recording signal processing circuit 4 converts the duty of a control recording signal and records it on a magnetic tape and the next address information is recorded on the magnetic tape by similar procedures. A high-speed search button of the operation section 1 is depressed at the reproduction, a control duty discrimination circuit 3 discriminates the duty ratio of the reproduced control signal at high speed drive, and when the address information exists, a running mechanism section 7 is brought into the reproducing state, a reproducing circuit 5 restores the signal into the original video signal and gives the result to a memory circuit 9, and the control section 2 gives a command to a memory control circuit 10 to store picture information in the memory circuit 9. The operations above are repeated several times to store the picture information and the address information at a location where the information of several addresses is recorded into the memory circuit 9, the result is converted into the video information and outputted from a VTR.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic recording and reproducing apparatus such as a video cheap recorder that searches for a tape position based on address information recorded on a magnetic tape and image information stored in a memory. (
(hereinafter abbreviated as VTR).

Conventional technology In recent years, when searching for a tape position, VTRs have
I had to remember what was recorded on the magnetic tape.

An example of the above-mentioned conventional VTR will be described below with reference to the drawings.

FIG. 3 is a block diagram of a conventional VTR.

In the figure, 1 is an operating unit, 2 is an input unit for inputting commands from the operating unit 1 and information from a control duty detection circuit,
This is a control section that outputs commands to each circuit to control 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 address information to the control section 2.

4 is a control recording signal processing circuit that converts the control recording signal into a recording signal with a duty ratio changed according to the address information; 6 is a reproduction circuit that amplifies the signal reproduced from the head and returns it to the original video signal; 6 is a traveling mechanism 7 is a running mechanism section for running the magnetic tape, and 8 is a television (TV) receiver.

The operation of the conventional VTR configured as described above will be explained below.

First, an address is set using the operating section 1 at the recording start position during recording or at a tape position desired to be detected during playback, and the input button is pressed. Button information from the operation section 1 is input to the control section 2, and then 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. The recorded address information is left using another recording means (not shown) provided separately.

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 address information set from the operation unit 1 is sent to the control unit 2.
and 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 and shapes the waveform even during high-speed running, further discriminates the duty ratio, and outputs the address information to the control section 2 if address information is detected. The control section 2 compares the set address information with the address information recorded on the magnetic tape, and if they are equal, a motor drive servo circuit is installed so that the traveling mechanism section 7 enters the playback state.
A command is output to the reproduction circuit 5. As a result, 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 and returns it to the original video signal of the VTR.
Output from. 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 address information is recorded, it is played back for several seconds and then run at high speed again. This operation is repeated until it ends at the desired tape position, and the next operation is started.

Problems to be Solved by the Invention However, with the above configuration, it is necessary to record the address information using other recording means or to check the relationship between the current tape position and the desired tape position many times. This poses a problem in that it places a burden on the user because he or she must remember the information.

In view of the above-mentioned problems, the present invention incorporates a one-field or one-frame memory means into a VTR so that what is recorded on a magnetic tape can be stored in the memory at once without recording address information on other recording means. To provide a magnetic recording and reproducing device which, when stored, retains the memory contents until the magnetic tape is removed, and can display image information and address information of a desired tape position 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 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 when traveling at high speed; a memory means for storing one field or one frame of image information and the address information; A control means for thinning out image information and storing it in a part of the memory means, and causing the image information to travel at high speed again to store in the memory means image information at several positions where address information is recorded; and the memory means. The apparatus includes a search means for searching the tape position based on the image information and address information stored in the apparatus.

Effects/Operations The present invention has the above-described structure, in which address information is entered at the tape position desired to be searched during playback during recording, high-speed search is performed, and image information at the tape position where the address information is recorded is stored in the memory means. Therefore, image information and address information of the tape position to be searched can be obtained without using any other recording means.

Embodiments Hereinafter, VTRs according to embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a VTR according to an embodiment of the present invention. FIG. 2 is an example of a display on a TV screen. In FIG. 1, 1 is an operating section, 2 is a control section, 3 is a control duty discrimination circuit, 4 is a control recording signal processing circuit, 6 is a reproduction circuit, 6 is a motor drive servo circuit, 7 is a traveling mechanism section, 8 is a TV receiver, which is similar to the conventional example shown in FIG. 9 is A/D and D/A
It is a memory circuit that has a converter and can store one field or one frame of image information. 1° is a memory control circuit that controls the memory, such as where in the memory 9 the image information is stored. Reference numeral 11 is a switch for changing between a memory image and a through image.

The operation of the VTR of this embodiment constructed as described above will be explained below with reference to FIG.

First, use the operation unit 1 to set an address at the tape position at which you want to detect the tape position at the start of recording or especially during playback, and press the input button. The control section 2 inputs button 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, which has the duty of the control recording signal converted, on the magnetic tape in accordance with the conversion data from the control section 2. Furthermore, the next address information is recorded on the magnetic tape using the same procedure as 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 to put the traveling mechanism section 7 in 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 determination circuit 3 amplifies the reproduced control signal, shapes the waveform, determines the duty ratio, and if address information is present, outputs the address information recorded on the magnetic tape to the control unit 2. . When the control section 2 receives the address information, it outputs a command to the motor drive servo circuit and the regeneration circuit 6 in order to put the traveling mechanism section 7 into a regeneration state. When the travel mechanism section 7 enters the regeneration state, the motor drive servo circuit controls motors such as the capstan motor and the 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 to the memory circuit 9.

After the image information is output, the control unit 2 outputs a command to the memory control circuit 10 to store the image information in the memory circuit 9. The memory control circuit 1o is a control section 2
According to the command, the image information and address information are controlled to be thinned out and stored in a part of the memory circuit 9. Initially, the data is stored in the memory circuit 9 corresponding to the upper left corner of the TV screen shown in FIG.

- After playing the magnetic tape for a certain period of time, the machine resumes high-speed running.

By repeating the above operation several times, the image information and address information of several locations where address information is recorded are stored in the memory circuit 9, and the contents are converted into video information and output from the VTR. The video signal is displayed on a TV receiver, the address for the next tape position search is set based on the image information and address information, and the tape is run at high speed.

The image will be displayed on the TV receiver 8 as shown in FIG. When the set address and the address information recorded on the magnetic tape become equal, the control section 2 sets the playback state. When the reproduction state is reached, the changeover switch 11 is changed to output the video signal output from the reproduction circuit 6 to the TV receiver as the output signal from the VTR. When the tape position search is to be performed again, the changeover switch 11 is changed over to display the address information and image information stored in the memory on the TV receiver, and the address setting for the next tape position search is performed and the tape is run 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. The information stored in memory is retained until the tape is removed from the VTR or a new high speed search is performed.

Effects of the Invention As described above, according to the present invention, a memory for storing one field or one frame of image information and address information, a memory control circuit for controlling a surface memory, and a discrimination circuit for discriminating the duty of a control signal are provided. With this feature, the content recorded on the magnetic tape can be stored and retained in the same memory, including image information and address information, by simply running the magnetic tape at high speed until the magnetic tape is removed from the VTR. It is possible to obtain excellent effects such as being able to easily store and search without using a separate memory.

[Brief explanation of drawings]

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... Changeover switch, 1
2...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 address information and image information and storing it in a part of the memory means, and driving the image at high speed again. control means for storing in the memory means image information of positions where address information of the locations are recorded; and search means for searching for a desired tape position using the image information and address information stored in the memory means. A magnetic recording/reproducing device comprising: