JPH067373U - Character separated display type television receiver - Google Patents

Abstract

(57) [Abstract] [Purpose] In a television receiver, for character information display that is separately provided by separating the character information from the video in which the character information is superimposed on the video information, such as character multiplex broadcasting. Display on the display to avoid loss of video information and deterioration of image quality. [Constitution] When the video signal includes character information, the signal separation circuit 14 separates the character information signal from the video signal processed by the video signal processing circuit 7, and the signal is decoded by the decoding circuit 16. Only the character information is displayed on the liquid crystal display unit 13. Further, when the video signal has a format in which the video area and the character area are divided and displayed within one screen, the video signal after separating the signal of the character information is aspect-converted by the aspect conversion circuit 15 and enlarged-displayed. Let

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a character-separated display type television receiver, in which character information is separated from video information that causes character information to be displayed in a part of the video such as a character multiplex broadcast or a video image including a screen, and is The present invention relates to a television receiver for displaying on a character display display provided in.

[0002]

[Prior art]

 Recently, character multiplex broadcasting has started in television broadcasting, and it is being widely used for character services for deaf people and broadcasting of stock market conditions. In this broadcast, the broadcasting station side transmits the character information as a packetized signal by using the vertical scanning 4 scanning lines of the video signal, and the television receiver with the built-in character information decoder circuit uses the character information described above. Is adopted to superimpose video information and text information by decoding.

In that case, as shown in FIG. 3, the character information is displayed by using the display area (hatched area) 32 above and below or on the left and right of the display screen 31, so that the viewer can see the image and the characters on the screen. You will see the information from one screen.

Further, recently, as for the video image, as shown in FIG. 4, a movie video in which the image region 33 is horizontally arranged in a cine size and the subtitle 34 is displayed below the region is available. For foreign movies, etc., a method has been implemented to make the text information easier to see by displaying the video and subtitle super in a single screen.

Further, in the above-mentioned split display method, it is possible to change the aspect of the video area 33 and display the video in the entire vertical direction of the screen. In that case, the signal of the subtitle 34 is displayed as a character. The shift circuit shifts it to the lower display area of the screen and displays it in the image area 33a after aspect conversion as shown in FIG.

[0006]

[Problems to be solved by the device]

 By the way, as shown in the above prior art, when a caption is displayed in the video area, the video information is missing due to the caption information, and information other than the original video information is imposed in the video information. However, there is a problem that the quality of the image deteriorates. On the other hand, if the video area 33 and the subtitle 34 are divided and displayed in one screen as shown in FIG. 4, the subtitle 34 becomes easier to see, but the area of the video area 33 becomes smaller, and only the video lacking the sense of presence and power is seen. It will not be possible.

Therefore, the present invention provides a television receiver with a dedicated display for displaying character information in addition to an ordinary display, and separates character information such as subtitles and displays it on the dedicated display. At the same time, it was created with the aim of displaying video information that does not include character information on the entire surface of a normal display, thereby eliminating the above problems.

[0008]

[Means for Solving the Problems]

 The present invention has a display for displaying character information in addition to an ordinary display in a television receiver, and when the received or input video signal includes a signal of character information, the signal is used as a video signal. Character separation display characterized by comprising a signal separation circuit for separating from the above, and a display control circuit for displaying on the character information display display by the signal separated by the signal separation circuit or by decoding the separated signal. Type television receiver.

In addition, the television receiver of the present invention separates the character information signal when the received or input video signal has a signal format in which the video area and the character area are divided and displayed on the display. It is also possible to provide an aspect conversion circuit that converts the aspect ratio of the image composed of the video signal after that to the aspect ratio compatible with the video display.

[0010]

[Action]

 According to the television receiver of the present invention, the signal of the character information is separated and extracted from the video signal, the video information separated from the character information is displayed as it is on a normal display, and the character information is separated by the dedicated signal. Display on the character information display. Therefore, the image information is not lost due to the character information, and the processing such as superimposing is not necessary, so that the quality of the image is not deteriorated. Furthermore, since the character information is displayed independently, it is easier to see the character information than when it is superimposed on the video information.

Further, for a video signal of a system in which a video area and character information are divided and displayed within one screen, an aspect conversion circuit is provided so that the video information can be displayed large on the entire screen. It will be possible.

[0012]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. 1 is a block circuit diagram of a character-separated display type television receiver according to an embodiment, and like a normal television receiver, a tuner circuit 2 connected to an antenna 1, a video tape recorder 3 and a tuner. A switching circuit 4 for switching the input from the circuit 2, an intermediate frequency amplifier circuit 5, a video detection circuit 6, a video signal processing circuit 7, a matrix circuit 8, a deflection circuit 9, a CRT 10, and an audio detection circuit 11 In this embodiment, a liquid crystal display unit 13 for displaying character information is provided in addition to the CRT 10 as a display device, and a video signal processing circuit 7 and a matrix circuit 8 are provided. A signal separation circuit 14 for separating the signal of the character information from the signal processed by the video signal processing circuit 7 and an aspect conversion circuit 15 for converting the aspect ratio of the image composed of the video signal are provided between them. Further, a decoding circuit 16 for decoding and outputting the character information signal separated by the signal separation circuit 14 and a liquid crystal driver 17 for driving the liquid crystal display unit 13 with the signal obtained from the decoding circuit 16 are provided. It is characterized in that it is used.

The signal separation circuit 14 receives from the video signal processing circuit 7 a determination signal indicating whether or not the character information is a signal format of video information that can be separated and its format information, and supports each signal format. The separated character information signal is executed. For example, if the video signal contains character information as closed caption, only the information of the closed caption part is separated and extracted, and if it is a character multiplex broadcast signal, only the signal of four scanning lines of vertical blanking. Is separated and extracted, and if the video signal is a video signal in the split display method as shown in FIG.

Further, the decoding circuit 16 also receives the determination signal and the format information from the video signal processing circuit 7 as with the signal separation circuit 14, and executes decoding corresponding to the format information. In this case, for example, when the format information indicates that the image signal includes closed captions, the closed caption decoding circuit is activated, and when the format information is a character multiplex image signal, the character multiplex decoding circuit is activated.

On the other hand, the aspect conversion circuit 15 indicates that the format information obtained from the video signal processing circuit 7 is the video image signal in the split display system as shown in FIG. 4, and the operation unit ( When an aspect conversion instruction is received from (not shown), the aspect ratio of the above-mentioned video image signal is converted to that corresponding to the screen of CRT10. That is, the image area 33 in FIG. 4 is enlarged and converted so that the image is displayed in the entire vertical direction of the CRT 10, and the horizontal side portions of the image information are lost due to the enlargement. The central part of the video information is displayed large on the entire surface of the CRT10.

With the above circuit configuration, when the signal format of the image information received or input from the video tape recorder 3 is such that character information can be separated, the signal separation circuit 14 separates the character information signal. In the decoding circuit 16, the separated signal is decoded according to the above format, and the liquid crystal driver 17 causes the liquid crystal display unit 13 to display the character information. Here, the liquid crystal display unit 13 is composed of a horizontally long screen capable of displaying several lines of character information with a horizontal length corresponding to the horizontal direction of the screen of the CRT 10. It is arranged in a close contact manner on the lower side. In addition, a backlight display system is used to make the character information easier to see.

Therefore, when a character multiplex broadcast is received or a video image signal in the split display method shown in FIG. 4 is input, as shown in FIG. 2, the image information is displayed on the CRT 10 without subtitles. The subtitle information that is displayed on the entire screen and that is separated is displayed on the liquid crystal display unit 13, which prevents the video information from being lost or narrowed due to the subtitles, while displaying the screen in a more legible liquid crystal display. Read from Part 13.

Although the liquid crystal display unit 13 is used as the character information display in the present embodiment, it is also possible to use a CRT having the same horizontally long size. In that case, The decoder circuit 16 allows the separated signal to pass through as it is, and the character information can be displayed by signal processing similar to that of a normal CRT. For example, for the video signal of the split display method shown in FIG. 4, if the video signal of the subtitle 34 portion is cut out and separated, and is displayed on the CRT on the character information display side, the decoder circuit 16 The decryption process in is unnecessary.

[0021]

[Effect of device]

 The character separation display type television receiver of the present invention has the following effects by having the above configuration. According to the invention of claim 1, a display for displaying character information is provided in addition to the normal display, and the character information separated from the video signal is displayed on the display, so that the video information is not lost by the character information. In addition, superimposing processing is not required, and high-quality images can be displayed. Further, since the character information is displayed by being completely divided from the video information, there is also an advantage that it is easier to see than the display mode in which the video information is imposed. According to the invention of claim 2, when the video signal has a signal format in which the video area and the character area are divided and displayed on the display, the video after the character signal is separated is aspect-converted and expanded to the entire display. Therefore, it is possible to display a realistic and powerful image.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of a character separation display type television receiver according to an embodiment of the present invention.

FIG. 2 is a front view of the television receiver according to the embodiment.

FIG. 3 is a diagram showing a subtitle display mode on a television screen in a character multiplex broadcast.

FIG. 4 is a diagram showing a screen configuration of a video image in which a video region and subtitles are divided and displayed within one screen.

[Fig. 5] Fig. 5 is a diagram showing a screen configuration in which a video image to be displayed by dividing a video region and a subtitle within one screen is aspect-converted and the subtitle is shifted within the screen.

[Explanation of symbols]

1 ... Antenna, 2 ... Tuner circuit, 3 ... Video tape recorder, 4 ... Switch circuit, 5 ... Intermediate frequency amplification circuit, 6 ... Video detection circuit, 7 ... Video signal processing circuit, 8 ... Matrix circuit, 9 ... Deflection circuit, 10 ... CRT, 11 ... audio detection circuit, 12 ... speaker, 13 ... liquid crystal display section, 14 ... signal separation circuit, 15 ... aspect conversion circuit, 16 ... decoding circuit, 17 ... liquid crystal driver.

Claims (2)

[Scope of utility model registration request] 1. A television receiver has a display for displaying character information in addition to an ordinary display, and when the received or input video signal includes a signal of character information, the signal is converted from the video signal. A character separation display television characterized by comprising a signal separation circuit for separating and a display control circuit for displaying on the character information display display by a signal separated by the signal separation circuit or by decoding the separated signal. John receiver. 2. An image composed of a video signal after separating the character information signal when the received or input video signal has a signal format in which a video area and a character area are divided and displayed on a display. 2. The character separated display type television receiver according to claim 1, further comprising an aspect conversion circuit for converting the aspect ratio of the above into an aspect ratio corresponding to a video display.