JPS63164585A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To insert character information into a video signal recorded by one device by generating a prescribed character video signal synchronously with a reproduced video signal and recording said character video signal in a recording medium during the reproducing of the video signal. CONSTITUTION:An operator turns change-over switches 16a, 16b, 16c to respective VTR sides in order to reproduce an image into which character information is to be inserted. Then, a control code signal is sent to a CPU 12 by using control key on an input device 11 and the CPU 12 converts date information inputted from a timer 13 into a prescribed code signal and outputs the code signal to a character signal generator 10. Gate pulses are outputted to a change- over switch 19 and a recording/reproducing changing switch 3 during a prescribed horizontal period to superpose a character video signal. A character generator 10 forms a character signal based on said code signal and a video signal generator 8 outputs a character video signal to a recording head 2 through an FM modulating circuit 17, a recording amplifier 20 and a change- over switch 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing apparatus that inserts a character video signal into a video signal and records it on a magnetic recording medium.

[Prior Art] A character video signal of an image displaying predetermined character information is inserted into a video signal, and the video signal with the characters inserted is recorded on a video tape installed in a video tape recorder (hereinafter referred to as a VTR). (1) A video signal is played back by a VTR, a text video signal of an image of predetermined text information is inserted into the reproduced video signal using a ticker device, and the video into which the text video signal is inserted is created. A method of recording the signal with another VTR; A method is known in which a video signal into which the character video signal is inserted is recorded on a VTR.

[Problems to be Solved by the Invention] In the former method of two series, it is necessary to use a relatively expensive teloper device.
R is required. On the other hand, in the latter method, text video signals are inserted in real time while photographing the subject.
There has been a problem in that it is not possible to insert a text video signal into a video signal reproduced by a VTR and record the video signal into which the text video signal has been inserted onto a videotape.

An object of the present invention is to solve the following two problems, and insert a character video signal of an image of predetermined character information into a video signal recorded on a magnetic recording medium using only one magnetic recording/reproducing device. An object of the present invention is to provide a magnetic recording device capable of recording.

[Means for Solving the Problems] The present invention provides a reproducing means for reproducing a video signal recorded on a magnetic recording medium, and a reproducing means for reproducing predetermined character information in synchronization with the video signal reproduced by the reproducing means. The present invention is characterized by comprising: a signal generating means for generating a character video signal of an image; and a recording means for recording the character video signal generated by the signal generating means on the magnetic recording medium during reproduction of the video signal. shall be.

[Operation] With the above configuration, the reproducing means reproduces the video signal recorded on the magnetic recording medium, while the signal generating means generates a predetermined signal in synchronization with the video signal reproduced by the reproducing means. A character video signal of an image of character information is generated. The recording means records the character video signal generated by the signal generating means on the magnetic recording medium during reproduction of the video signal.

[Embodiment] FIG. 1 is a block diagram of a VTR with a character information insertion function, which is an embodiment of the present invention. This VTR is characterized by inserting and recording a text video signal of predetermined text information into the videotape (-nose 1) while reproducing the video signal recorded on the videotape 1. The video signal is a monochrome video signal containing only a luminance signal.

In FIG. 1, a video signal recorded on a video tape I is played back by a magnetic head 2, and the played recorded video signal is sent to a playback processing circuit 5 via the PB side of a recording/playback switch 3 and a playback amplifier 4. is input. The recorded video signal input to the playback processing circuit 5 is subjected to predetermined processing such as FM demodulation, and then output to the synchronization separation circuit 6 via the VTR side of the changeover switch +6a,
The signal is output to the video output terminal 21 via the VTR side of c. On the other hand, the video signal inputted from the external video input terminal 14 is manually inputted to the external side of the adder 15 and the changeover switch 16a. The horizontal synchronization signal Hsync and vertical synchronization signal V5sync are extracted and separated from the reproduced video signal or external video signal inputted to the synchronization separation circuit 6 and output to the synchronization signal generator 7.The synchronization signal generator 7 is connected to the PLL circuit. The input horizontal synchronizing signal Hsyn is composed of an oscillator including
Based on the horizontal synchronization signal Hsync and the vertical synchronization signal V5sync, even if the signals Hsync and V5sync drop out, the horizontal synchronization signal Hsync and the vertical synchronization signal V5sync are continuously
5sync, a crank pulse, and a blanking pulse, and sends the horizontal synchronizing signal Hsync via a phase compensation pulse delay circuit 9 to a video signal generator 8? It also outputs a crank pulse and a blanking pulse to the video signal generator 8, and further outputs a horizontal synchronizing signal H=4.
~ 5ync and vertical synchronization signal y 5ync is output to the character signal generator IO.

FIG. 2 is an external view of a human input device 11 for manually inputting character information to be inserted into a video signal, and this input device 11 is composed of a control key section 30 and a keyboard section 40. The control key part 30 includes an insertion display on/off switch 31 that switches whether or not to insert text information into the video signal, a character type changeover switch 32 that switches the type of text information to be inserted, such as date, time, or text. An insertion position designating slide switch 33 for instructing which part of the screen between the two sides and the bottom of the screen the characters to be displayed are to be displayed, and a cursor key 34 that does not move the cursor to the left or right of the screen when inputting characters.
a and 34. b, a delete key 35, an insert key 36, and a backspace key 37 for deleting, inserting, and backing up characters, respectively. Further, the keyboard section 40 includes a keyboard 41 for inputting alphanumeric characters, hiragana, and katakana, and a numeric keypad 42. The input device II converts the control contents input by the operator using the control key part 30 into a control code signal and outputs it to the central processing circuit (hereinafter referred to as CPU) 12. It converts the input characters into character code signals and outputs them to the CPU 12.

When the CPU 12 receives a control code signal indicating that the insertion display on/off switch 3I is on,
A gate pulse indicating the period in which the character video signal is superimposed in the video signal period of the video signal is applied to each control input terminal of the recording/reproducing switch 3 and the switch 19 during a predetermined horizontal period in which the character video signal is superimposed. Output. Also, CPU
12 converts the date or time information output from the timer 13 or the character code signal output from the input device 11 into a predetermined parallel code signal based on the control code signal input from the input device 11, and generates a character signal. Output to generator IO.

The character signal generator IO receives an input horizontal synchronizing signal Hsy.
nc and vertical synchronization signal V5ync, a character signal corresponding to the input parallel code signal is generated and output to the video signal generator 8, and in response to this, the video signal generator 8 receives the input. A character video signal including the character signal and the horizontal synchronization signal Hsync is generated by the horizontal synchronization signal Hsync, a clamp pulse, and a blanking pulse, and is transmitted to the FM via the VTR side of the changeover switch 16b.
It is output to the modulation circuit 17 and also to the adder 15. The adder 15 adds the input external video signal and character video signal and outputs the result to the FM modulation circuit 17 via the external side of the changeover switch +6b, and also outputs it to the video output terminal via the external side of the changeover switch 16c. Output to 21.

The text video signal manually input to the FM modulation circuit 17 or the external video signal on which the text video signal is superimposed is FM-modulated at a predetermined carrier frequency and then sent to the buffer amplifier 18, the recording amplifier 20, and the recording/reproducing switch 3 for REC processing. The FM-modulated video signal is output to the magnetic head 2 via the side, and the FM-modulated video signal is recorded on the video tape 2. In addition, buffer amplifier 1
The output terminal of 8 is connected to ground via switch 19, =7= The switch 19 is always on, and the switch 19
When an H level gate pulse is applied to the control input terminal of the switch 19, the switch 19 is turned on. In addition, the recording/playing selector switch 3 is always on the PB side during playback and when inserting character information, which will be described in detail later.
Switches to the REC side only when a gate pulse of level I] is applied to the control input terminal of. Furthermore, the changeover switches 16a, 16b, and 16c are switched to the VTI' (side or outside side) in conjunction with each other.

The operation of the VTR configured as described above will be explained by taking as an example the case where character information 51 of the date is inserted in the upper part of the screen 50 of the video signal recorded on the videotape I as shown in FIG. 3. This will be explained below with reference to it.

The operator first loads the video tape 1 on which the video signal of the image in which the character information 51 is to be inserted is recorded into the VTR, puts it into playback mode, and then switches the selector switches I6a, 16b and +6.
c to the VTR side, and using the control key part 30 of the input device II, turn on the =8= insertion display on/off key 31, switch the character type changeover switch 32 to the date side, and then press the insertion position designation slide switch. Switch 33 to the upper side. As a result, the input device I+ outputs a control code signal of these control information to the CPU 2, and in response, the CPU 12 converts the date information manually inputted from the timer into a predetermined parallel code signal and sends it to the character signal generator IO. Along with outputting to
A gate pulse indicating the position of the video signal where the character video signal is inserted is output to each control input terminal of the changeover switch I9 and the recording/reproduction changeover switch 3 during a predetermined horizontal period when the character video signal is superimposed. For example, when character information 51 is inserted on the ``-'' side of the screen 50 as shown in FIG. 3, the horizontal period during which the ``2'' gate pulse is at the H level is from 251 to 75I.

Further, the character signal generator 10 generates a character signal based on the parallel code signal "-", and the video signal generator 8
In response to this, the video signal generator 8 generates a horizontal synchronizing signal H5ync synchronized with the reproduced video signal and a character video signal including the character signal, and selects the changeover switch 16b.
The signal is output to the FM modulation circuit 17 via the VTR side. Furthermore, the FM-modulated character video signal is sent to the buffer amplifier 1.
8. The signal is output to the magnetic head 2 via the recording amplifier 20 and the REC side of the recording/reproducing switch 3.

Therefore, as shown in FIG. 4, when the H level gate pulse is output from the CPU 12 during playback of the video signal recorded on the video tape 1, the recording/reproduction changeover switch 3 is switched to the REC side and the switch is switched to the REC side. 19 is turned off, the FM video signal output by the video signal generator 8 and subjected to FM modulation is recorded via the magnetic head 2 on the video tape l being played back. Note that the waveform of the video signal is shown when the video signal in which the character video signal of FIG. 4 is inserted is reproduced.

Furthermore, if you want to insert and record text information into the external video signal input from the external video input terminal 14, switch the selector switches +6a, 16b and 16c to the external side and perform the same operation as described above. Although the video signal processed by this VTR is a monochrome video signal, the video signal generator 8 is provided with a function of generating a color video signal, and the reproduction processing circuit 5 and the FM modulation circuit 17 are provided with a function of color signal processing. Accordingly, the present invention can be easily applied to a VTR for color video signals.

[Effects of the Invention] As described in detail above, according to the present invention, a character image of an image of predetermined character information is generated in synchronization with a video signal reproduced by a reproducing means that reproduces a video signal recorded on a magnetic recording medium. Since it is equipped with a signal generating means for generating a signal and a recording means for recording a character video signal generated by the signal generating means on the magnetic recording medium during reproduction of the video signal, one magnetic recording and reproducing apparatus is provided. A character video signal of an image of predetermined character information can be inserted and recorded into a video signal recorded on a magnetic recording medium using only a magnetic recording medium, and there is no need to use a relatively expensive captioner device as in the conventional example.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a VTR with a text information insertion function that is an embodiment of the present invention, Fig. 2 is an external view of the input device of the VTR shown in Fig. 1, and Fig. 3 is a screen when text information is inserted. FIG. 4 is a timing chart showing waveforms of various parts of the VTR shown in FIG. 1. ■...Video tape, 2...Magnetic head, 3...Recording/reproduction switch, 4...Playback amplifier, 5...Playback processing circuit, 6...Synchronization separation circuit, 7...Synchronization Signal generator,...Video signal generator, 10...Character signal generator, 11...Input device, I2...Central processing circuit (CPU), 17...
FM modulation circuit, I8... buffer amplifier, 19... switch, 20... recording amplifier.

Claims (1)

[Claims] (1) a reproduction means for reproducing a video signal recorded on a magnetic recording medium; a signal generation means for generating a character video signal of an image of predetermined character information in synchronization with the video signal reproduced by the reproduction means; A magnetic recording and reproducing apparatus comprising: recording means for recording a character video signal generated by the signal generating means on the magnetic recording medium during reproduction of the video signal.