JPH02121482A - Video signal processing device - Google Patents

Abstract

PURPOSE:To superimpose a title on a magnetic tape recorded already in an optional designated timing by recording position information of the magnetic tape onto a track other than a video track on the tape and superimposing a title signal on a reproduced video signal at this position. CONSTITUTION:A position information signal representing a timing when the title is superimposed is recorded on a track other than the video track on the magnetic tape 1 and a code signal of the title generated separately is recorded to a head of the magnetic tape 1. The code signal of the title at the head of the magnetic tape 1 is at first in a storage means 12 at reproduction and then a code signal of the title is read from the storage means 12 according to a position information signal representing the superimposing timing recorded on a track other than the video track on the magnetic tape 1 and it is converted into the title signal by a conversion means 13 and the title signal is superimposed on the reproduced video signal by a superimposing means 14. Thus, the deterioration in the picture quality due to dubbing or the like is not caused and the superimposition of the title able to be inserted, corrected or erased freely is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video signal processing device that can freely insert, modify, and delete titles such as characters and graphics in magnetic recording and reproducing devices and the like.

[Conventional technology]

An example of a device that superimposes characters and graphics onto a video signal is the VH3, which was released by Toshiba Corporation in September 1987.
There is a VTR-integrated camera Al-30AF.

In this method, characters generated by a character generator are superimposed on an image captured by a camera, and then recorded in V'r'R.

Furthermore, as a method for superimposing a title on a magnetic tape on which a video signal has already been recorded, the title is superimposed on the reproduced video signal using, for example, an editing device equipped with a character generator, and then the title is superimposed on a magnetic tape on which a video signal has already been recorded. There is a way to record it.

[Problem to be solved by the invention]

In the above-mentioned prior art, the former method involves superimposing a title signal on a video signal and recording the video signal at the same time; therefore, it is not possible to freely superimpose a title after recording.

Furthermore, since the latter method requires dubbing when superimposing a title, image quality deteriorates.

SUMMARY OF THE INVENTION An object of the present invention is to provide a video signal processing device that superimposes titles that can be freely inserted, modified, and deleted without deteriorating image quality due to dubbing or the like.

[Means to solve the problem]

The above object is to provide a magnetic recording and reproducing apparatus, a means for recording position information of a magnetic tape on a track other than a video track on the tape and reproducing the same, a storage means capable of storing a plurality of encoded title signals; This is achieved by providing means for converting a coded title signal into a title signal of characters, graphics, etc., and means for superimposing the title signal on a reproduced video signal.

[Effect]

The user records position information fA indicating the timing at which the title is to be superimposed on a track other than the video track on the magnetic tape, and records a separately created title code signal at the beginning of the magnetic tape.

At the time of playback, first the code signal of the title at the beginning of the magnetic tape is taken into the storage means, and then the code signal of the title (2 After the converting means converts this into a title signal, the superimposing means superimposes the title signal on the reproduced video signal.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention,
1 is a magnetic tape, 2.3 is a recording/reproducing head for video signals, 4 is a cylinder, 5 is a capstan, 6 is a control circuit for the cylinder and capstan, 7 is a recording signal processing circuit, 8 is a reproduction signal processing circuit, 9 is a For control signals, ! re-head,
10 is a control signal generation circuit; 11 is a tape position information detection circuit;

12 is a memory, 13 is a pattern generation circuit, 14 is a superimposition circuit, 15 is a video signal output terminal J, 16.17 is a switch circuit, 18 is a pulse generation circuit, 24 is a title input circuit, 25 is a counter, and 26 is a control This is a signal input terminal.

In the figure, first, the circuit operation when the user inputs a title to be inserted will be described.

The user operates the title input circuit 24 to create a title and stores it in the memory 12.

The title input circuit 24 is, for example, a word processor, and generates a character code signal corresponding to a character or figure specified from the outside.

This character code signal is written into the memory 12 via the switch circuit 16. If you want to create multiple titles,
By dividing the storage area in the memory 12 into the required number of titles and guiding the title identification signal created by the title input circuit 24 to the memory 12 via the switch circuit 17, a record corresponding to each title (,Q 81 area is designated and character code signals are selectively written.

Next, a description will be given of the circuit operation when I-accounting the timing when superimposing the created title on the reproduced video signal.

The superimposition timing is specified using information indicating the magnetic tape position recorded on a track other than the video track of the magnetic tape 1 (for example, Vl (VAS defined by the S standard).
S (VH3 address search system signal, etc.)
Use.

It is assumed that a video signal has already been recorded on the video track on the magnetic tape 1. The cylinder and capstan control circuit 6 controls the operation of the cylinder 4 and capstan 5, and the running of the magnetic tape 1 by the capstan 5 and the rotation of the video signal recording/reproducing head 2.3 by the cylinder 4 are synchronized. It is done as follows.

The video signal recorded on the magnetic tape 1 is transferred to the recording/reproducing head 2.3.
The signal is guided to the reproduced signal processing circuit 8 via the superimposing circuit 2 and output to the output terminal 15.

The user operates the pulse generating circuit 18 at a desired timing to superimpose the title by displaying the video signal obtained at the output terminal 15 on a monitor, for example.
．． Generate a pulse signal.

The counter 25 counts this pulse (No. 3) and outputs the counted result to the control signal generation circuit 10.

The control signal generation circuit 10 generates a position information signal for the magnetic tape 1 according to the count value from the counter 25, and records this on the magnetic tape 1 via the control signal recording/reproducing head 9.

Assuming that the user operates the pulse generation circuit 18 a total of n times to generate pulses through the above operations, the counter 25 updates the count value n times, and the corresponding position information signal of the magnetic tape 1 (e.g. A signal representing a number from 1 to n) is recorded on the magnetic tape 1.

Next, transfer the created title character code signal to the magnetic tape 1.
The circuit operation when recording is explained below.

After the magnetic tape 1 is fed to the beginning part by the capstan 5, the recording mode is set. The record from memory 12,
(The character code signals of each title in the two areas are read out, subjected to historical processing by the recording signal processing circuit 7, and then recorded on the leading portion of the magnetic tape 1 via the recording/reproducing head 2.3.

Next, the circuit operation when superimposing a title on a reproduced video signal will be explained.

The magnetic tape 1 is sent sequentially from the beginning by a capstan 5, and the recorded signals are sent to a reproduction signal processing circuit 8 via a recording/reproduction head 2.3, where signal processing for reproduction is performed.

The title character code signal recorded at the beginning of the magnetic tape 1 is led to the memory 12 via the switch circuit 16 and written therein.

During playback of the magnetic tape 1, the control signal is read out by the control signal recording/reproducing head 9. This signal is guided to the tape position information detection circuit 11, and the magnetic tape position information signal (for example, 1-
After detecting n), it is guided to the memory 12 via the switch circuit 17.

Thereby, the character code signal of the title in the storage area is selectively read out from the memory 12 according to the position on the magnetic tape.

The read character code is input to the pattern generation circuit 13. The pattern generation circuit 13 is, for example, a character generator, and generates characters, figures, etc. according to an input code signal.

The title signal such as characters or figures thus obtained is led to the superimposition circuit 14, superimposed on the video signal from the reproduced signal processing circuit 8, and then outputted to the output terminal 15.

Note that the hexagonal terminal 26 is an input terminal for a control signal, and is used to switch whether or not to superimpose a title signal.

The circuit operation of FIG. 1 will be explained in more detail using FIG. 4.

FIG. 4 is a diagram showing title position information on the magnetic tape 1, where 1 is a magnetic tape, 1v is a video track, and I
C is the control signal track where the control signal is recorded, IT is the ff7 part of the video track 1■, IA and I
B indicates the position of the control signal written to the control track IC.

It is assumed that during reproduction, the magnetic tape 1 is sequentially reproduced from left to right in the figure.

In the figure, the user controls the pulse generation circuit 18 in Figure 1 and writes position information to the control track IC at the timing when the user wants to insert a title while monitoring the video signal being played back from the magnetic tape l. It's crowded. Figure 4 shows this location information on tape! This is an example of writing in two locations, IA and IB.

Next, the created and encoded title signals T1 and T
2 from the memory 12 and the beginning part IT of the magnetic tape 1
Write to.

At the time of playback, the beginning part IT is first played back.

This is transferred to the memory 12 via the switch circuit 16 in FIG.
Write to. After that, video track 1■ is sequentially played back, and title position information II on the control track IC is played back.
At the timing when IA is read out, the title signal T1 is read out from the memory 12, and the title is superimposed on the video signal.

Below, tie at the timing of tape position WI B!・
Read small signal T2. If three or more tiles are to be superimposed, the same operation may be repeated.

By the above-described operation, the user can superimpose the title he or she has created on the magnetic tape l on which video signals have already been recorded at any timing.

FIG. 2 is a block diagram showing another embodiment of the present invention, in which 19 is an index signal detection circuit and 20 is a counter. Other parts that are the same as those in the embodiment shown in FIG. 1 are given the same reference numerals.

In the figure, information indicating the running position of the tape is, for example, VISS (indicative) defined by the VH5 standard.
An index signal typified by the VH3 Index Search System) is used.

The control I/roll signal generation circuit 10 includes a pulse generation circuit 1
An index signal is generated by the pulse signal from 8 and recorded on the magnetic tape 1.

During reproduction, the index signal detection circuit 19 detects the index signal to be reproduced, and the index signal is detected by the counter 2.
Count by 0. This count value is led to the memory 12, and the title signal stored in the memory 12 is selectively read out according to the count value and W-folded into the reproduced video signal.

The operation of the other parts of the tree embodiment is the same as in the previous embodiment, so a detailed explanation will be omitted.

FIG. 3 is a block diagram showing still another embodiment of the present invention, in which 21 is a time code reader, 22 is a register,
23 is a search circuit. Other parts that are the same as those in the embodiment shown in FIG. 1 are given the same reference numerals.

In the figure, a magnetic tape 1 has tiles 1 and 1 indicating hour, minute, and second frame numbers during the vertical blanking period of the video signal (for example, a VCR used in commercial VTRs).
ITC(Vevttcal Tinterval)
Time Cocle) etc. are recorded.

The time code reader 21 reads out the rm code from the reproduced video signal from the reproduced signal processing circuit 8.

When specifying the title insertion timing, the user operates the pulse generation circuit 18 to generate a pulse at the desired timing for insertion in the magnetic tape playback mode. The register 22 stores the time code read out at the timing of this pulse.

Thereafter, the same operation is repeated as many times as the number of titles desired to be inserted, and the time code at the required timing is stored in the register 22.

When recording the title signal from the memory 12 onto the magnetic tape, the time code data stored in the register 22 is also recorded at the beginning of the magnetic tape.

At the time of reproduction, first, the title character code signal and time code data stored at the beginning of the magnetic tape are written into the memory 12 and the register 22, respectively.

After that, the reproduced time code is read from the time code league 21, the content of the register 22 is searched by the search circuit 23, and if the two match, the title signal is read from the memory 12 and added to the reproduced video signal. Superimpose.

The operations of other parts are similar to those of the previous embodiments, so detailed explanations will be omitted.

〔Effect of the invention〕

As explained above, according to the present invention, a title created by the user can be superimposed on a magnetic tape on which a video signal has already been recorded at any specified timing, and furthermore, it is possible to control whether or not superimposition is possible. , titles can be inserted without deterioration of image quality due to dubbing.

In addition, information regarding title insertion is recorded at the beginning of the magnetic tape and on tracks other than the video track, so you can freely add, modify, or delete titles without affecting the video signal. According to the present invention, it is possible to provide a video signal processing device that can perform normal operation even in a conventional VTR without a title insertion device, maintains compatibility, and has excellent functions except for the problems of the prior art described above. can.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are block diagrams showing an embodiment of the present invention, and FIG. 4 is a diagram showing the position of title information on a magnetic tape. 10... Control signal generation circuit, 1
1...Tape position information detection circuit, 12.
......Memory, 13...Pattern generation circuit, 14...Superimposition circuit, 18
......Pulse generation circuit, 19...
...Index signal detection circuit, 21...
...Time code reader, 24...Title input circuit. Figure 1 Millet Figure 2 Figure 4 Figure A Old

Claims (1)

[Scope of Claims] 1. In a video signal processing device for a magnetic recording/reproducing device that is capable of adding a title to a recorded recording medium, if a video signal is recorded on a track other than the video track on the recorded recording medium, a recording/reproducing device comprising a means for reading a position information signal indicating a traveling position of a recording medium; an input means for inputting a title such as characters or figures; and a title signal from the input means or a position information signal recorded on the recording medium. a storage means for storing a title signal, and a superimposition means for superimposing the title signal on a video signal reproduced from the recording/reproducing device, and a superimposition means for storing the title signal on the video signal reproduced from the recording/reproducing device, and according to the timing specified by the position information signal, from the storage means. A video signal processing device characterized in that the video signal processing device reads out a title signal of the video signal, and superimposes the title signal on the video signal by the superimposing means. 2. In a video signal processing device of a magnetic recording/reproducing device that is capable of adding a title to a recorded recording medium, the video signal recorded on the recording medium during the blanking period in the video track on the recording medium on which the video signal is recorded. A recording/reproducing device equipped with a means for reading a position information signal indicating a running position, an input means for inputting a title such as characters or figures, and a title signal from the input means or a title signal recorded on the recording medium. The apparatus further comprises a storage means for storing the title signal and a superimposition means for superimposing the title signal on the video signal reproduced from the recording/reproducing device, and the title signal is output from the storage means according to the timing specified by the position information signal. A video signal processing device characterized in that the title signal is read out and the title signal is superimposed on the video signal by the superimposing means. 3. Means for recording the title signal stored in the storage means by the input means on the recording medium, and means for storing the title signal recorded on the recording medium in the storage means. A video signal processing device characterized by being provided with.