JP2713417B2 - Character / graphic information display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character / graphic information display device that decodes received character / graphic information and displays it on a display unit.

2. Description of the Related Art In recent years, various television multiplex broadcasts have been considered in order to make effective use of broadcast radio waves. One of the multiplex broadcasts is home news such as text and graphics, weather forecasts, stock market conditions, and the like. TV character multiplex broadcasting capable of projecting the character graphic information on a screen of a television receiver has been put to practical use. On the other hand, Videotex, which transmits character / graphic information using a telephone line and displays similar information on a screen of a television receiver, has also been put to practical use.

Hereinafter, a character / graphic information device capable of receiving the character / graphic information as described above and displaying the character / graphic information on a screen of a television receiver will be described with reference to the drawings.

FIG. 9 shows the configuration of a conventional character / graphic information display device. In FIG. 9, 1 is a character / graphic information decoding unit for decoding character / graphic information into a character / graphic image, 2 is a microprocessor circuit for controlling the character / graphic information decoding unit, and 3 is character / graphic information as digital data from a video signal. The receiving circuit 4 stores the received character / graphic information,
RA used as a work area of the microprocessor circuit 2
M, 5 is a ROM for storing a program for controlling the microprocessor circuit 2, 7 is a display memory for storing a character graphic image decoded by the microprocessor circuit 2, and 6 is a display memory 7. A display processing circuit for synthesizing a character / graphic image into an RGB signal, 9 is a character generator used when decoding character / graphic information into a character / graphic image, and 8 is additional sound data contained in the character / graphic information. The additional sound decoder 10 to be processed is a keypad for instructing the character / graphic information decoding unit to select character / graphic information. 20 is a television signal receiving unit, 21 is an antenna, 22
Is a television signal receiving circuit, 23 is an audio demodulating amplifier circuit,
24 is a luminance amplification color demodulation circuit, 25 is a video and audio signal of a television, and a video and audio switching circuit for switching or mixing an RGB signal and an additional sound signal output from the character / graphic information decoding unit,
26 is an audio amplification output circuit, 28 is a speaker, 27 is a video amplification output circuit, and 29 is a display unit for displaying an image.

The operation of the character / graphic information display device configured as described above will be described below.

The television signal received by the antenna 21 is demodulated by a television signal receiving circuit 22 of the television signal receiving section 20, and a video signal and an audio signal are extracted. The video signal is
The character / graphic information is input to the receiving circuit 3 of the character / graphic information decoding unit 1 and extracted from the video signal. The user instructs the microprocessor circuit 2 to select desired character / graphic information from a large amount of character / graphic information by scanning the keypad 10. The microprocessor circuit 2 selects the designated character / graphic information, stores the selected character / graphic information in the RAM 4, and performs a decoding process according to the contents of the program stored in the ROM 5 while using the character generator 9 as necessary. Is converted to a character / graphic image and stored in the display memory 7. The character / graphic image stored in the display memory 7 is synthesized into an RGB signal by the display processing circuit 6. The additional sound data included in the character / graphic signal is
The additional sound signal is converted by the additional sound decoder 8 into an additional sound signal.

On the other hand, the audio signal and the video signal demodulated by the television receiving circuit 22 are respectively input to an audio demodulation amplification circuit 23 and a luminance amplification color demodulation circuit 24, processed, and input to a video audio switching circuit 25. The video / audio switching circuit 25 switches between a video signal (RGB signal) and an audio signal (additional sound signal) output from the text / graphic information decoding unit 1 and a television video signal and audio signal, thereby converting the text / graphic image. The former is selected for displaying, and the latter is selected for displaying a television image, and is input to a speaker 28 and a display unit 29 through an audio amplification output circuit 26 and a video amplification output circuit 27, respectively. By the above operation, the user can cause the display unit 29 to display the selected character / graphic information.

However, in the character / graphic information display device configured as described above, the image displayed on the display unit is such that the television image is one of the character / graphic images, and while the character / graphic image is selected. However, there is a problem that a television image cannot be viewed. In addition, there is a problem that only one screen of a character graphic image can be displayed.

Therefore, the present applicant has first provided a character / graphic information apparatus capable of simultaneously displaying a television image and a character / graphic image on a display unit, and capable of simultaneously displaying a plurality of character / graphic images on the display unit. (Japanese Patent Application No. 62-186238)
issue).

As shown in FIG. 6, the character / graphic information display device includes a receiving circuit 3 for receiving character / graphic information, a display memory 7 for storing a character / graphic image obtained by decoding character / graphic information, and one or more of them. Decoding means 2 for decoding a plurality of character / graphic information into one or a plurality of character / graphic images at a display density different from the display density specified by the display control information, and storing the decoded data in the display memory 7; A display processing circuit 6 for displaying one or a plurality of character / graphic images on the display unit 29.

Further, the decoding means 2 calculates a logical sum of each pixel in a section twice as long and short as the minimum pixel of the pattern data expressing the graphic by dots in the character / graphic information, thereby reducing the size to one pixel. , A first character generator 9 for outputting a pattern corresponding to the character code in the character / graphic information, and a second character generator 11 for outputting a reduced pattern corresponding to the character code. And the second character generator 11
A second reducing means 13 for displaying a reduced character / graphic image by outputting the character / graphic image, and a block which is twice the size of the block which is the minimum designation unit of the attribute data for designating the display attribute of the character / graphic in the character / graphic information The third reduction unit 14 reduces the number of attribute data to one block by selecting the most attribute data from the attribute data of each block.

With this configuration, the character / graphic information received by the receiving circuit 3 is decoded into a reduced character / graphic image by the decoding unit 2 having the first reducing unit 12, the second reducing unit 13, and the third reducing unit 14. The display processing circuit 6 reads out the contents of the display memory 7 and displays the character / graphic image in the portion where the character / graphic image is stored, and stores the character / graphic image. The parts that are not
By synthesizing the television image so that the television image is displayed, the television image and the character / graphic image are simultaneously displayed on the display unit 29.
Can be displayed. (This situation is shown in FIGS. 7 and 8.) Further, by storing the reduced character / graphic information in the display memory 7 on a plurality of screens, a plurality of character / graphic images are simultaneously displayed on the display unit 29. It becomes possible.

However, in the character / graphic information display device having the above-described configuration, one or a plurality of reduced images displayed on the display unit 29 can be displayed horizontally by one line specified by the screen control information. There has been a problem that it is difficult to display by scroll display or vertical scroll display. If one or a plurality of reduced images can be displayed by one-line horizontal scrolling or vertical scrolling display, there is a problem that a control circuit becomes complicated and cost increases.

The present invention has been made in view of the above problems, and provides a character / graphic information display device that can convert a display image of horizontal scrolling and vertical scrolling of one line into a fixed display without greatly changing the display image and display the fixed image on a display unit.

Means for Solving the Problems In order to achieve the above object, a character / graphic information display device according to the present invention is provided for displaying a display address designated for one-line horizontal scrolling and vertical scrolling display in a fixed display. It comprises a converting means for converting to a display address, and a display means for displaying on the display unit in accordance with the converted display address.

With this configuration, one or a plurality of reduced screens instructed to be displayed by one-line horizontal scrolling or vertical scrolling are converted by the conversion means into display addresses that can be displayed in fixed display, and the display means Thus, it is possible to display on the display unit according to the converted display address.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a character / graphic information display device according to an embodiment of the present invention.

In FIG. 1, 1 is a character / graphic information decoding unit for decoding character / graphic information into a character / graphic image, 9 is a first character generator having the same function as a conventional character generator, and 11 is a reduced pattern. The second character generator, 2 is a first reducing means.
A microprocessor circuit having decoding means including 12, 12, 13 and 14;
Is a display processing circuit that reads out the contents of the character graphic image and displays the character graphic image, and the part where the character graphic image is not stored is a display processing circuit that synthesizes a television image to be displayed. . 4 is a RAM, 5 is a ROM, 8 is an additional sound decoder, 10 is a keypad, and the above is the same as the configuration shown in FIG.

15 is a converting means for converting a display address instructed to be displayed in a horizontal scrolling or vertical scrolling display on a reduced screen into a display address for displaying a fixed display, and 16 is a display converted by the converting means 15. Display means for displaying a reduced image on the display unit 29 according to the address.

The operation of the character / graphic information display device configured as described above will be described below. The character / graphic information display device of the present embodiment can basically perform the same operation as that of FIG. FIG. 2 shows an example of a vertical scrolling screen configuration. In the case of vertical scrolling, pages 1 to 4 are displayed while being rolled up from the bottom of the display unit 29 to the top. FIG. 3 shows that the vertical scroll screen shown in FIG.
When displayed by the display means 31, pages 1 to 4 are displayed at intervals of n seconds.

FIG. 4 shows an example of a screen configuration of one-line horizontal scrolling. When the display is performed by one-line horizontal scrolling, the first to fourth pages are displayed while moving from right to left on the display unit 29. FIG. 5 shows a case where the one-line horizontal scroll screen of FIG. 4 is converted to a fixed screen by the conversion means 30 and displayed by the display means 31. Pages 1 to 4 are displayed at intervals of n seconds.

As described above, according to the present embodiment, by providing the microprocessor circuit 2 including the conversion unit 30 and the display unit 31, the one-line horizontal scroll display and the vertical scroll display of the reduced image are converted to the fixed display. It can be displayed.

As described above, according to the present invention, by having the microprocessor circuit including the conversion unit and the display unit, it is possible to convert the one-line horizontal scroll display and the vertical scroll display of the reduced image into the fixed display and display the fixed image. In a character / graphics information display device for displaying one or a plurality of reduced images, information of one-line horizontal scroll display and vertical scroll display is displayed on a display unit without complicating a scroll control circuit and increasing costs. Is possible, and the effect is significant.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a configuration of a main part of a character / graphic information display device according to an embodiment of the present invention, FIG. 2 is a diagram showing a configuration example of a vertical scroll screen, and FIG. FIG. 4 is a diagram showing a display example converted into a display and displayed, FIG.
FIG. 5 is a diagram showing a configuration example of a one-line horizontal scroll screen, FIG. 5 is a diagram showing a display example in which a one-line horizontal scroll screen is converted into a fixed display, and FIG. 6 is a character proposed prior to the present invention. 7 is a block diagram showing a configuration example of a graphic information display device, and FIG.
FIG. 8 is a front view showing a display example, and FIG. 9 is a block diagram of a conventional character / graphic information display device. 29 display unit, 30 conversion means, 31 display means.

Continuing on the front page (72) Inventor Yuji Kondo 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 72) Inventor Toyoaki Unemura 1006 Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Hidemi Hemi 1006 Kadoma, Oji Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) JP-A-62-59485 (JP, A) JP-A-54-84431 (JP, A) JP-A-55-107654 (JP, U)

Claims (1)

(57) [Claims] 1. A character / graphic information display device for displaying character / graphic information including display control information at a display density reduced from a display density specified by the display control information.
A character graphic comprising: conversion means for converting line horizontal scrolling and vertical scrolling display to page display; and display means for displaying character / graphic information converted into a plurality of page displays at regular time intervals. Information display device.