JPH0576047A - Recording and reproduction system for video tape recorder device - Google Patents

Abstract

PURPOSE:To record character information such as a title or a speech to be displayed, and to display it at the time of reproduction by operating either the correcting processing of a video signal obtained by a reproducing processing based on specific information, or a character information displaying processing at the time of displaying the video signal on a screen. CONSTITUTION:An index area 3 is provided between a preampul 1 and a postampul 2 at each rotary head track, and one head 5 of '4' bites, and five packs 6 of '6' bites are ensured at each block 4 constituting the pertinent area 3. Then, at the time of recording or edition, chrominance signal correction information, luminance correction information, and character information such as the tile or the speech or the like is recorded in the first data area 7a - fourth data area 7d ensured at each pack 6 of the index area 3, and at the time of reproduction, the chrominance signal or the luminance signal is corrected based on the information stored in each data area 7, and the character information such as the title or the speech is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing system for a video tape recorder used in a home video tape recorder, a professional video tape recorder, a still video camera or the like.

[0002]

2. Description of the Related Art In the case of recording with a video camera device or the like, when a subject to be recorded is photographed, or when the color temperature of a light source or the aperture value of the video camera device is erroneously recorded, a color corrector or the like is reproduced. Often you play this while modifying the recorded content.
In addition, in order to save the trouble at the time of such reproduction, when reproducing the recorded video tape, it is dubbed to another video tape recorder device while correcting the recorded content using a color corrector etc. From the next time onward, such correction work may be omitted.

[0003]

However, in the conventional correction method described above, when the color temperature of the light source or the aperture value of the video camera device is erroneously recorded at the time of recording, each time the recorded image is reproduced. However, there was a problem that the recorded contents had to be corrected by using a color corrector and the like, which was time-consuming. Also, while correcting the recorded contents using a color corrector etc. and dubbing this to another video tape recorder device, the quality of the image will deteriorate when the correction work is omitted from the next time onward. was there. Further, in such a video tape recorder device, there is a strong demand for recording character information such as a title and dialogue on a video tape.

Therefore, it is conceivable to record such character information in an index area used in a normal video tape recorder, but such an index area is used for an address, a time code, and information for cueing. Since this index area is often used as a recording area, if this index area is used as a recording area for character information such as titles and dialogues, it becomes impossible to record addresses, time codes, and information for cueing. Therefore, as a method used in such a case,
A method has been developed in which digital information is inserted in the vertical blanking period (line 21) of a video signal such as closed captioning to display character information such as dialogue on the screen. However, such a method has a problem that a large amount of character information cannot be displayed because the amount of recordable information (bit rate) is low.

If such a process is performed by the video tape recorder device, there is a problem that the hardware cost of the video tape recorder device becomes high.
In view of the above circumstances, the present invention can omit color correction processing during reproduction even if there is a color temperature setting error or aperture setting error during shooting, and records character information such as a title or dialogue to be displayed. It is an object of the present invention to provide a recording / reproducing system of a video tape recorder device capable of displaying this during reproduction.

[0006]

In order to achieve the above object, a recording / reproducing system of a video tape recorder according to the present invention uses a video reproduced in the index area of a video tape having an index area in a rotary head track. When information corresponding to a signal is written and the video tape is played back, at least one of correction processing of a video signal obtained by a playback operation based on the information or character information display processing when the video signal is displayed on a screen The feature is that one is performed.

[0007]

In the above structure, information corresponding to the video signal to be reproduced is written in the index area of the video tape having the index area in the rotary head track, and when the video tape is reproduced, based on the information. By performing at least one of the correction processing of the video signal obtained by the reproduction operation and the character information display processing when the video signal is displayed on the screen, even if there is a color temperature setting mistake or aperture setting mistake during shooting, In addition to omitting color collect processing during reproduction, character information such as a title or dialogue to be displayed is recorded and displayed during reproduction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a recording / reproducing system of a video tape recorder according to the present invention will be described with reference to the drawings. First, in the recording / reproducing method in which the index area is defined in the rotary head track, an index area 3 is provided between the preamble 1 and the postamble 2 for each rotary head track as shown in FIG. One "4" byte header 5 and five "6" byte packs 6 are secured for each block 4 constituting the area 3.

The present invention pays attention to the index area 3, and at the time of recording or editing, the first data area 7 secured for each pack 6 in the index area 3 is used.
a to color signal correction information, luminance signal correction information, character information such as titles and dialogues are recorded in the fourth data area 7d, and color difference signals and luminance signals are recorded based on the information recorded in each data area 7 during reproduction. The basic principle is to correct or display character information such as the title or dialogue.

In this case, a video camera device, an editing device,
The video tape recorder device, etc. is provided with a lever and keyboard like a joystick and a write command button,
After inputting the correction amount by operating the lever or inputting character information etc. by operating the keyboard, press the write command button while playing the part to be corrected on the videotape or the part to write character information. By pressing
The color difference signal correction information, the luminance signal correction information, the character information such as the title and the dialogue, etc. to be written are recorded in a predetermined index area 3. For example, color difference signal correction information and luminance signal correction information are recorded in the first data area 7a to the fourth data area 7d, and the first data area 7a is recorded during reproduction.
-When correcting a color signal or a luminance signal based on the information recorded in the fourth data area 7d, the correction information is recorded in the first data area 7a to the fourth data area 7d of the first pack 6 as shown in FIG. To do.

Then, at the time of reproduction, the correction information recorded in the first data area 7a to the fourth data area 7d is read, and the luminance signal Y of the video signal obtained by the reproducing operation based on the correction information is read. The color difference signals PB and PR are corrected. In this case, the correction circuit shown in FIG. 3, for example, is used as a circuit for correcting the luminance signal Y and the color difference signals PB and PR.

The correction circuit shown in this figure captures and outputs the correction information βDC recorded in the third data area 7c, the luminance signal Y obtained by the reproducing operation, and the fourth data area 7d. The multiplication circuit 11 that multiplies the correction information βAC recorded in step S11 and the multiplication result of the multiplication circuit 11 and the correction information βDC output from the holding circuit 10 are added to output the corrected luminance signal Y ′. An addition circuit 12, a multiplication circuit 13 for multiplying the luminance signal Y obtained by the reproduction operation by the correction information αB recorded in the first data area 7a, and the multiplication circuit 13
The addition circuit 14 which outputs the corrected color difference signal PB ′ by adding the result of the multiplication and the color difference signal PB obtained by the reproducing operation, the luminance signal Y obtained by the reproducing operation and the second data area 7b. A multiplication circuit 15 that multiplies the recorded correction information αR, and an addition circuit that adds the multiplication result of the multiplication circuit 15 and the color difference signal PR obtained by the reproducing operation to output a corrected color difference signal PR ′. 16 and 16.

Then, the luminance signal Y and the color difference signals PB and PR are corrected according to the respective correction information αB and αR and the correction information βDC and βAC obtained by the reproducing operation, and the luminance signal Y'obtained by this correcting operation is corrected. , Color difference signals PB ′ and PR ′ are output. In addition, the video signal obtained by the reproducing operation is NT
When the composite video signal is of the SC system, the correction circuit shown in FIG. 4 is used as the correction circuit.

The correction circuit shown in this figure separates a composite video signal obtained by a reproducing operation into a luminance signal Y and a color signal C, and a Y / C separation circuit 20 and this Y / C separation circuit 20.
B− in the color signal C obtained by the C separation circuit 20
A carrier extraction circuit 21 for extracting a first subcarrier corresponding to the Y axis and a second subcarrier corresponding to the RY axis.
And a multiplication circuit 22 for multiplying the correction information αB recorded in the first data area 7a by the luminance signal Y obtained by the Y / C separation circuit 20, and the multiplication circuit 22.
Multiplication circuit 23 that multiplies the multiplication result of the first subcarrier obtained by the carrier extraction circuit 21, the correction information αR recorded in the second data area 7b, and the Y / C separation circuit 20. A multiplication circuit 24 that multiplies the obtained luminance signal Y, a multiplication circuit 25 that multiplies the multiplication result of the multiplication circuit 24 and the second subcarrier obtained by the carrier extraction circuit 21, and each of these multiplication circuits 23. , 25 and the Y / C separation circuit 20.
An adder circuit 26 for adding a color signal C output from the adder to output a corrected color signal, and the adder circuit 26.
The addition circuit 27 for adding the corrected color signal obtained by the above and the luminance signal Y output from the Y / C separation circuit 20 to output a corrected composite video signal.
It has and.

Then, the composite video signal is corrected according to the respective correction information αB and αR obtained by the reproducing operation, and the composite video signal obtained by this correcting operation is output. When the character information is recorded in the first data area 7a to the fourth data area 7d, the character information to be recorded is recorded at the time of recording or editing, and the first data area 7a to the fourth data area at the time of reproduction. The character information recorded in the data area 7d is read and displayed on the screen.

In this case, as the character information recorded in the first data area 7a to the fourth data area 7d, for example, if the English version characters and the Japanese version characters of the Western picture soft tape are recorded, a person who wants to study English conversation. Can display the English version of the characters, and for those who want to display in Japanese, the Japanese version of the characters can be displayed. However, in this case, when the Japanese characters are recorded in the first data area 7a to the fourth data area 7d, the first data area 7a to
Since it is possible to record information of only "8" bits in each of the fourth data areas 7d, there are two data areas, for example, the first data area 7a and the second data area 7b.
Record one Kanji code with.

Further, as the character information recorded in the first data area 7a to the fourth data area 7d, character information indicating the contents of each soft tape, for example, chapter "1" is "youth edition", chapter "2". Even if you record the explanation of the video contents such as "Rishi" and "Success" in chapter "3" and use the explanations as a guideline to find the part you want to see. good. In addition, the first data area 7a to the fourth data area 7
As the character information recorded in d, the character information necessary for understanding the contents of each soft tape, for example, the profile of the character or the profile of the town that is the stage of the story, is recorded, and in an interactive form with the user side. It is also possible to read out the necessary character information and display it on the screen.

As described above, in this embodiment, the video tape of the type in which the index area 3 is provided in the rotary head track is used, and it is secured for each pack 6 which constitutes the index area 3. Color difference signal correction information, luminance signal correction information, character information such as title and dialogue are recorded in the first data area 7a to the fourth data area 7d, and are recorded in the first data area 7a to the fourth data area 7d during reproduction. The color difference signal and the luminance signal are corrected based on the stored information, and the character information such as the title and dialogue is displayed, so even if there is a color temperature setting error or aperture setting error during shooting, it will be displayed during playback. Color collect processing and the like can be omitted, and character information such as a title and dialogue to be displayed can be recorded and displayed during reproduction.

[0019]

As described above, according to the present invention, even if there is a color temperature setting mistake, aperture setting mistake, or the like at the time of shooting, color collection processing or the like can be omitted at the time of reproduction, and the title to be displayed or Character information such as dialogue can be recorded and displayed during reproduction.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining an embodiment of a recording / reproducing system of a video tape recorder device according to the present invention.

FIG. 2 is a table showing an example of information recorded in each data area shown in FIG.

FIG. 3 is a block diagram showing an example of a correction circuit used in the embodiment shown in FIG.

FIG. 4 is a block diagram showing another example of the correction circuit used in the embodiment shown in FIG.

[Explanation of symbols]

 1 Preamble 2 Postamble 3 Index area 4 Block 5 Header 6 Pack 7a to 7d First to fourth data area

Claims (2)

[Claims] 1. Information corresponding to a video signal to be reproduced is written in the index area of a video tape having an index area in a rotary head track, and when the video tape is reproduced, a reproduction operation is performed based on the information. A recording / reproducing system for a video tape recorder, wherein at least one of a correction process of the obtained video signal and a character information display process when the video signal is displayed on a screen is performed. 2. The recording / reproducing system of a video tape recorder according to claim 1, wherein the information written in the index area is any one of color difference signal correction information, luminance signal correction information, character information such as a title and dialogue.