JPH0357382A - Magnetic recorder - Google Patents

Abstract

PURPOSE:To record an auxiliary data together with a video signal to be recorded by utilizing a vertical blanking period of a video signal to be recorded so as to insert and record the auxiliary data such as a date data. CONSTITUTION:A time of a clock 12 is given via a date data generating section 13 at date recording and the result is inserted to the vertical blanking period of a video signal J synchronously with a synchronizing signal F and a vertical synchronizing signal F. The video signal K with a date data inserted thereto is processed to be recorded by a VTR recording system 3 and recorded on a tape 5 via a recording and reproducing head 4. A reproduction system 6 obtains a reproduction video signal G at the reproduction and an extraction section 8 extracts the date data from the reproduction signal G by using the synchronizing signal E and the vertical synchronizing signal F. A character generating section 1 generates a pulse B from the extracted data as a character. A character signal superimposing section 2 obtains a signal G in response to a request signal ID from a microcomputer. A date display section 9 displays a date externally via a liquid crystal display device. Through the constitution above, the date data is recorded without losing the information of the video signal.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a magnetic recording device having a function of recording video signals, and in particular, when recording video signals, auxiliary data information such as date and time is stored in the video. The present invention relates to a magnetic recording device capable of recording along with signals.

[Conventional technology]

Conventionally, magnetic recording devices, that is, video table recorders, have been provided that have a function of superimposing and recording auxiliary data information such as the date and time at the time of video signal recording (hereinafter referred to as date data) on the image signal. It has been.

FIG. 3 schematically shows the system configuration of a conventional video tape recorder having a function of recording and reproducing date data together with a video signal.

In the figure, the video table recorder system has a clock section 12 inside, and a date data creation section 13 that refers to the time indicated by this clock section 12 and creates date data L, in response to a date recording request signal IH. , given date data L
It includes a character signal generating section 1 which converts and outputs a character signal pulse B in synchronization with a synchronization signal E and a vertical synchronization signal F. Further, a video signal A is given from the input terminal 10, and the video signal A
A character signal superimposing section 2 processes the character signal pulse B so as to superimpose it on a character signal pulse B and outputs a composite video signal C, and a VTR (abbreviation for video table recorder) records that processes the applied composite video signal C so that it can be recorded. system 3, a recording/reproducing head 4 having both functions of recording and reproducing video signals, and a magnetic tape 5 on which video signals are recorded via the recording/reproducing head 4;
including. It also includes a synchronization signal separation circuit 14 that separates synchronization signal E from video signal A, and a vertical synchronization signal separation circuit 15 that separates vertical synchronization signal F. Furthermore, the VTR processes the video signal reproduced from the magnetic tape 5 via the recording/reproducing head 4 so that it can be displayed on a picture tube or the like, and outputs the reproduced video signal D to the outside of the system via the output terminal 11. Includes a regeneration system 6. The date recording request signal 4R given to the character signal generating section 1 is output by the microcomputer in the video table recorder upon detecting the user's operation of an external switch to request date recording. Further, the vertical synchronization signal separation circuit 15 separates the vertical synchronization signal F from the synchronization signal E provided from the synchronization signal separation circuit 14 and outputs it.

Next, the operation of recording and reproducing date data in the system shown in FIG. 3 will be explained with reference to FIGS. 3 and 4.

FIG. 4 shows the IH interval (one horizontal scanning period) or one horizontal scanning period of each signal detected and generated within the system block of FIG.
FIG. 2 is a schematic diagram of a signal waveform in a V interval (one vertical scanning period).

First, a case will be described in which a video signal including date data is recorded.

+1 data creation section 13 refers to time=1 section 12 and calculates [1
Create weight data 7, give the weight data signal L to the character (number 3 generation unit 1).
A video signal A is provided via the . Further, the synchronization signal separation circuit 14 separates and outputs the synchronization signal E from the video signal A, and the vertical synchronization signal separation circuit 15 separates and outputs the vertical synchronization signal F from the synchronization signal E. On the other hand, the character signal generating section 1 converts the date data signal L into a character signal pulse B in synchronization with the synchronization signal E and the vertical synchronization signal F, and supplies it to the character signal superimposition section 2. At this time, the character signal superimposing section 2 processes the character signal pulse B to be superimposed on the video signal A as shown in FIG.
is giving to That is, as shown in FIG. 4, the character signal pulse B is superimposed on the I2 section of the video signal A, and a combined video signal C having a character luminance level α higher than the signal level of the video signal A is obtained. The composite video signal C is then VT
The signal is applied to the R recording system 3, undergoes signal processing so as to be recordable on the magnetic tape 5, and is recorded on the magnetic tape 5 via the recording/reproducing head 4. Note that the character signal generator 1 operates to output a character signal pulse B in response to the date recording request signal IR. In other words, the character signal pulse B is output only when the date recording request signal IR has such a signal content that the user requests date recording.

Next, a case will be described in which a video signal including date data recorded as described above is reproduced.

During playback, the combined video signal C recorded on the magnetic tape 5 is played back by the recording/playback head 4 to produce vrRs.
The signal is processed in the raw system 6 and becomes the reproduced video signal D, output terminal 1
It is output to the outside via l.

In the reproduced video signal D thus obtained, the basis weight data is reproduced as a part of the video signal as shown in FIG. 4, so that the recording date can be confirmed along with the video on the reproduction screen.

[Problems to be Solved by the Invention] As described above, conventionally, date data is converted into a character signal and ffi-folded into the IH section of the video signal. therefore,
There is a problem in that the information of the video signal in the portion where the basis weight data is superimposed is lost. Furthermore, since it is impossible to extract only the date data from the video signal, there is a problem in that it is not possible to use the date data to search for the playback start point on the magnetic tape. Furthermore, since the date data is recorded only when there is a user's request for date recording during recording, there is a problem in that the date data cannot be arbitrarily checked during playback. Furthermore, the character signal for date data is
The signal is processed as part of the video signal in the VTR recording system and VTR playback system. In other words, due to the distortion that occurs in the mutual signal level change part due to the superposition of date data and video signal, various waveform distortions and distortions occur depending on the amplitude and phase characteristics of each system.
For example, there is a problem in that phenomena such as streaking and ringing occur and the quality of the playback screen deteriorates.

Therefore, an object of the present invention is to be able to record auxiliary data information such as date data together with the video signal without losing the information of the video signal, and to make it possible to arbitrarily check the auxiliary data information such as the date data during playback. It is an object of the present invention to provide a magnetic recording device having a recording function that allows the above-described recording functions to be performed.

[Means for Solving the Problems] A magnetic recording device according to the present invention is a magnetic recording device for magnetically recording a video signal, and includes means for generating auxiliary data information to be added to the video signal to be recorded; and means for inserting the auxiliary data information generated by the auxiliary data information generating means into the vertical retrace interval of the video signal.

[Function] In the magnetic recording device configured as described above, when attempting to record auxiliary data information such as date data along with the video signal, the auxiliary data information to be added to the video signal to be recorded is obtained from the means for generating the auxiliary data information. The auxiliary data information is inserted and recorded using the vertical retrace section of the video signal to be recorded. Therefore, it is possible to record auxiliary data information such as date data together with the video signal to be recorded without losing the information of the video signal to be recorded.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

Note that in the present invention, auxiliary data information such as date data that is recorded together with the video signal when recording the video signal is
The video signal is continuously recorded through a series of routes.

In the following explanation, the date data at the time of recording is taken as an example of the auxiliary data information recorded with the video signal, but the auxiliary data is not limited to this, and may also be data regarding the location at the time of recording, etc. .

FIG. 1 schematically shows the system configuration of a video tape recorder having a function of recording and reproducing date data together with a video signal according to an embodiment of the present invention.

The major difference between the system configuration shown in FIG. 1 and the conventional system configuration shown in FIG. Insert date data to be given to VTR recording system 3.
A replacement unit 7, a date data extraction unit 8 that extracts date data from the reproduced video signal G in synchronization with the synchronization signal E and the vertical synchronization signal F during playback, and a date display unit that can display the extracted date data externally. 9 has been newly added. Furthermore, the character signal generating section 1 and the character signal superimposing section 2, which were conventionally provided to operate during recording, are provided to operate during reproduction, converting the extracted date data into a character signal pulse B, Another point is that the reproduction processing is changed so that this is superimposed on the reproduced video signal G. Note that if the signal content of the date reproduction request signal ID given by the microcomputer requests date reproduction, the character signal superimposing section 2 superimposes the character signal pulse B on the reproduced video signal G to generate the combined video signal I. It is working to output. On the other hand, if the signal content does not request date reproduction, it operates to output only the reproduced video signal G. The rest of the functional configuration is the same as the conventional one, so the explanation will be omitted.

Next, the operation of recording and reproducing date data in the system shown in FIG. 1 will be explained with reference to FIGS. 1, 2, and 4.

FIG. 2 is a schematic diagram of signal waveforms in the IH section or IV section of each signal detected and generated within the system block of FIG. 1. In Fig. 2, the signals J, K, I
Signals j, k, and i indicate enlarged waveforms of signals in a certain section of . Although the video signal J is the same as the video signal A shown in FIGS. 3 and 4, they are purposely distinguished for the purpose of simplifying the explanation.

First, a case will be described in which date data is recorded together with a video signal.

Video signal J given to the system via human power terminal 10
is a video signal K into which date data has been inserted in the nHth vertical retrace interval Vblk of the signal by the date data insertion/replacement unit 7.
get. As shown in FIG. 2, the date data is a digital signal. In detail, the date data insertion/replacement unit 7
The patent publication indicated by the clock section 12 is given as a date data signal L via a date data creation section 13. Accordingly, the date data signal L is replaced with a digital signal, and the video signal J is synchronized with the synchronization signal E and vertical synchronization signal F provided from the synchronization signal separation circuit 14 and the vertical synchronization signal separation circuit 15.
It is inserted into the vertical retrace interval Vblk. The video signal K into which the date data has been inserted is subjected to signal processing so as to be recordable by the VTR recording system 3, and is recorded on the magnetic tape 5 via the recording/reproducing head 4.

Next, a case will be described in which a video signal into which date data recorded on the magnetic tape 5 is inserted as described above is reproduced.

During playback, the video signal K with date data recorded on the magnetic tape 5 is played back by the recording/playback head 4, and subjected to signal processing by the VTR playback system 6 to become a playback video signal G. The reproduced video signal G is simultaneously applied to the data extraction section 8 with "1", the character signal superimposition section 2, and the synchronization signal separation circuit 14.

The date data extraction unit 8 extracts the date data inserted into the supplied reproduced video signal G in synchronization with the synchronization signal E and the vertical synchronization signal F supplied from the synchronization signal separation circuit 14 and the vertical synchronization signal separation circuit 15. . The extracted date data is sent to the next character signal generation section 1 and date display section 9.
given at the same time. The character signal generating section 1 converts the extracted date data into a character signal, and provides a character signal pulse B to the character signal superimposing section 2 at the next stage. Therefore, the character signal superimposing section 2 selects either the composite video signal 1 obtained by superimposing the character signal pulse B on the reproduced video signal G or the reproduced video signal G, depending on the date reproduction request signal ID given by the microcomputer at this time. It operates to output one signal. Therefore, if the player desires to play the basis weight, he or she can obtain the combined video signal (2) on which the date is superimposed, so that the recording date can be displayed together with the video on the playback screen. Furthermore, if the player does not desire date playback, a playback screen without date display can be obtained using the playback video signal G.

On the other hand, the date display section 9 is given date data extracted from the reproduced video signal G. Accordingly, the date data is converted into an electrical signal that drives a display medium included in the date display section 9, and the date is displayed externally via the display medium. As a display medium included in the date display section 9, for example, an LED (Light Emitting Diode) is used.
(abbreviation for e) display devices, liquid crystal display devices, etc.

In addition, although the above embodiment describes only date data display, the extracted date data is compared with preset date data using microcomputer processing, etc., and the results of the comparison can be used to search recorded tapes, etc. You can also do it.

Furthermore, when recording video signals using a camera-integrated video table recorder, etc., the camera section has a built-in date data suppression and replacement function, and the date data is inserted into the vertical retrace interval of the video signal. may also be recorded.

[Effects of the Invention] As described above, according to the present invention, auxiliary data information is generated and inserted into the vertical retrace interval of the video signal to be recorded, and always
I try to record it. Furthermore, during playback, auxiliary data information inserted into the vertical retrace section of the playback video signal is extracted, converted into a character signal, and arbitrarily superimposed on the playback video signal.

Therefore, since the auxiliary data information is inserted into the vertical retrace interval of the video signal, it is possible to record the video signal information without losing it.Also, the superimposition of the character signal and the video signal is performed after the video signal is played back. A high-quality playback screen can be obtained.Additionally, the extracted date data can be used to search for video signals recorded on a magnetic tape.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a system configuration of a video table recorder having a function of recording and reproducing date data together with a video signal according to an embodiment of the present invention. Figure 2 shows the first
FIG. 2 is a diagram showing schematic waveforms of each signal detected and generated within the system block shown in the figure. FIG. 3 is a schematic diagram of the system configuration of a conventional video table recorder having a function of recording and reproducing date data together with a video signal. FIG. 4 is a diagram showing schematic waveforms of each signal detected and produced within the system block of FIG. 3. In the figure, 1 is a character signal generating section, 2 is a character signal superimposing section, 3 is a VTR recording system, 4 is a recording/reproducing head, 5 is a magnetic tape,
6 is a VTR playback system, 7 is a date data insertion/replacement section, 8 is a date data extraction section, 9 is a date display section, 10 is an input terminal,
11 is an output terminal, 12 is a clock section, 13 is a date data production section, 14 is a synchronization signal separation circuit, 15 is a door direct synchronization signal separation circuit, A and J are video signals, B is a character signal pulse, C
and I is a composite video signal, D and G are playback video signals,
E is a synchronization signal, F is a vertical synchronization signal, K is a video signal containing date data, ! R is a date recording request signal and ID is a date reproduction request signal. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] A magnetic recording device for magnetically recording a video signal, comprising: means for generating auxiliary data information to be added to the video signal to be recorded; and auxiliary data information generated by the auxiliary data information generating means. A magnetic recording device comprising: means for inserting a video signal into a vertical retrace interval of a video signal.