JPS61117987A - Video disk - Google Patents

Abstract

PURPOSE:To select arbitrarily an operation such as displaying character information and erasing it by recording a signal of character information, a signal for showing the top of a character string, a signal for showing its end and a signal for showing start and termination periods of a display. CONSTITUTION:It is assumed that the color burst signal 2 of a composite video signal A includes a character signal. A character signal separating device 3 separates the character signal from the composite video signal A, and a display control signal separating device 4 separates the signals for showing the top and end of the character string from the separated character signal to transmit them to a display controller 5. It executes the array control so as to dispose character patterns which a character pattern generator 6 sequentially generates in a memory device 7, receiving the character signal, and supplies a signal for showing synthesization of them with other pictures, or the stop timing of the synthesization to a video synthesization processor 8, which synthesizes a composite video signal B capable of displaying a popular video signal and signals of the character string on the same screen. By the operation of a switch installed outside, the synthesization of the character string with the popular video signal is carried out or stopped.

Description

[Detailed description of the invention] [Technical field of invention 1 The present invention relates to video discs.

[Technical background of the invention and its problems 1 A so-called video disc, which is a disk-shaped information recording medium,
Video disc players that read information recorded on the disc and convert it into a signal suitable for displaying the information as a video on a television broadcast receiving device are already becoming popular.

The content of the information recorded on the video disc includes not only people, scenes, and other information that forms one piece of information as a whole screen, but also information that is translated from the language of the audio that is linked to the screen into another language. The displayed characters, the characters of the lyrics displayed in conjunction with the accompaniment music of the song, etc. may be recorded in a superimposed manner as appropriate depending on the usage pattern.

In other words, the text information recorded on conventional video discs is recorded as part of the image information, and it is impossible to erase only the text when playing back using a receiving device. there were.

However, since video discs can be played back and used repeatedly, there are many lessons that can be learned while watching them repeatedly.
There are cases where the user has memorized the lyrics and the like, and there is no need to display the translated characters or the characters of the lyrics. In such a case, the display of the characters described above may seem cumbersome. Also, when learning a language or practicing a song, you may want to actively erase text information in order to directly listen to the foreign language and memorize the lyrics.

Therefore, as mentioned above, the inability to erase text information means that
This can be a major drawback depending on the purpose for which the video disc is used.

[Object of the Invention] The present invention has been made based on the above-mentioned circumstances, and is capable of displaying recorded character information in a superimposed manner with image information during playback, erasing it and displaying only image information, or displaying the image information as desired. The aim is to obtain a video disc that can be played.

[Summary of the Invention] The video disc of the present invention is capable of recording an image signal that can be reproduced by a television broadcast receiving device and an audio signal that can be reproduced by the receiving device, and in which the video disc can record an image signal that can be reproduced by a television broadcast receiving device and an audio signal that can be reproduced by the receiving device. A character information signal, a signal indicating the beginning of the character string, and a signal indicating the end, in one or both of the line period or the vertical retrace period, all at once or in a distributed manner;
It is characterized in that signals indicating the start time and end time of the display are recorded.

[Embodiment 1 of the invention The present invention will be explained in detail with reference to FIGS. 2 and 3.

First, Fig. 2 is a diagram schematically showing approximately one horizontal scanning period of a television signal, which is generally called a composite video signal. A in this figure is one horizontal scanning period, and 8 periods of this Signal 1 included in is displayed on the screen. That is,
Since the remaining period C is a period that is not directly displayed on the screen, if the character information signal is recorded within this period and is retrieved and displayed on the screen as necessary,
Character information can be displayed or deleted as desired. Note that the text information is, for example, color burst message @2.
is recorded by pulse code modulating the amplitude of .

Next, FIG. 3 is a diagram schematically showing the state of the synchronization pulse of the composite video signal during the vertical blanking period. As is clear from this figure, since the necessary pulse signal is significant only in one direction, character information can be recorded using pulses with reversed polarity and displayed on the extraction screen as needed. You can select display or deletion.

The present invention takes advantage of the above to construct a video disc in which text information can be erased during playback or displayed in a superimposed manner with image information.

That is, the video disc of the present invention is a video disc capable of recording an image signal that can be reproduced by a television broadcast receiving device and an audio signal that can be reproduced by the receiving device. Character information signals, signals indicating the beginning and end of a character string, and signals indicating the start and end times of the display, either all at once or dispersed, in either or both of the period or the vertical retrace period. (hereinafter abbreviated as character signal).

FIG. 1 shows a block diagram of the main parts of the video disk reproducing apparatus of the present invention having the above-mentioned configuration.

First, it is assumed that the color burst signal 2 of the composite video signal A shown in FIG. 2 includes a character signal.

The character signal separation bag V13 separates a character signal from the composite video signal A, and the display control signal separation device 4 separates and displays a signal indicating the beginning and end of a character string from the separated character signal. The display control device 5 receives the character signal and performs an arrangement 1111111 for arranging the character patterns sequentially generated in the memory device W17. A signal indicating when to combine or cancel the combination of the character strings arranged in 7 with another image is supplied to the video composition processing device 8. The video synthesis processing device 8 synthesizes a composite video signal B that can display a projected video signal and a character string signal on the same screen. Furthermore, by operating a switch provided externally, for example on the casing of a video disc player, a character display/character erase external 1lIIIlI signal can be input to start or stop combining the character string and the general video signal. do.

As is clear from the above, the digital disc of the present invention can display text information on the television screen or cancel the display at will.
It is very useful depending on its application.

In the above embodiment, the case where character information is recorded during the horizontal retrace period is exemplified, but when the character information is recorded during the vertical retrace period, the character information is displayed and erased in the same manner as described above.

Furthermore, the present invention is not limited to the composite video signal exemplified above, and even in the case of signal formats that will be invented in the future, the present invention may have one or both of a horizontal retrace period and a vertical retrace period, or If the brass signal has periods that are not displayed on the screen, the present invention can be applied by recording character information in those periods.

[Effects of the Invention] In the video disc of the present invention, the character information can be extracted separately from the general image when played back by a video disc player, so the character information can be displayed on the screen or erased. Since the video discs can be selected arbitrarily, the range of use of video discs not only for entertainment purposes but also for educational purposes is expanded, and the effects in terms of applications are great.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of an apparatus for reproducing a video disc according to the present invention, FIG. 2 is a schematic diagram of a composite video signal, and FIG. 3 is a schematic diagram of synchronization pulses of the composite video signal. Application agent

Claims (1)

[Claims] In a device capable of recording an image signal that can be reproduced by a television broadcast receiving device and an audio signal that can be reproduced by the receiving device, either or both of the horizontal retrace period or the vertical retrace period of the image signal. A video disc characterized in that a character information signal, a signal indicating the beginning and end of a character string, and a signal indicating the start time and end time of display are recorded, either all at once or in a dispersed manner. .