JPH02135884A - Teletext receiver - Google Patents

Abstract

PURPOSE:To view character graphic information of respective pages having the same programs as displayed character graphic information without a waiting time by providing a composite means decoding encoded character graphic information and converting it into picture information, a memory, a reservation registration means, a program reservation means and a data selection means. CONSTITUTION:When a user operates a key pad 10 and designates the number of character graphic information which is to be displayed in a display part 29, the data selection means 11 of a micro processor circuit 2 selects character graphic information of the designated number. The micro processor 2 decodes the selected character graphic information and stores it in a display memory 7 as picture information. The reservation registration means 12 registers the program number of the decoded character graphic information. The program reservation means 13 compares the program number registered in the reservation registration means 12 whenever character graphic information is received. When they coincide, the character graphic information is stored in the memory 14. Thus, information of respective pages can be viewed without the waiting time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a teletext receiving device that receives and decodes character and graphic information multiplexed with television broadcasting and displays it on a display unit such as a CRT. be.

2. Description of the Related Art In recent years, various television multiplex broadcasts have been considered in order to make effective use of broadcast waves. Teletext broadcasting, which can display information on the screen of a television receiver, has already been put into practical use.

Hereinafter, with reference to the drawings, a description will be given of a teletext receiving apparatus, as described above, which can receive text and graphic information multiplexed and transmitted with a television broadcast and display it on the screen of a television receiver.

FIG. 4 shows the configuration of a conventional teletext receiver. In FIG. 4, reference numeral 1 denotes a text/graphic information decoding unit that decodes text/graphic information into text/graphic images, 2 a microprocessor circuit that controls the text/graphic/graphic information decoding unit 1, and 3 converts text/graphic information from a video signal into digital data. 4 is a RAM used to store the received character and graphic information and is used as a work area for the microprocessor circuit 2; 5 is a ROM that stores a program for controlling the microprocessor circuit 2; 7 is a microprocessor. a display memory for storing the character and graphic images decoded by the processor circuit 2; a display processing circuit 6 for synthesizing the character and graphic images stored in the display memory 7 into RGB signals;
9 is a character generator used to decode text and graphic information into text and graphic images; 8 is an additional sound decoder that processes additional sound data included in the text and graphic information; and 10 is for instructing the selection of text and graphic information. It's a keypad. 20 is a television signal receiving section, 21 is an antenna, 22 is a television signal receiving circuit, 23 is an audio demodulation amplification circuit, 24 is a brightness amplification/color demodulation circuit, and 25 is a television video/audio signal and text/graphic information. 26 is an audio amplification output circuit; 27 is a video amplification output circuit; 28 is a speaker; 29 is a video display circuit; This is the display section.

The operation of the teletext receiving apparatus configured as described above will be described below.

The television signal input from the antenna 21 is sent to the television signal receiving circuit 22 of the television signal receiving section 2o.
The signal is demodulated and the video and audio signals are extracted. The video signal is input to the receiving circuit 3 of the text/graphic information decoding section 1, and text/graphic information is extracted from the video signal. By operating the keypad 10, the user requests the microprocessor circuit 2 to select a desired text/graphic information program from among many text/graphic information programs. The microprocessor circuit 2 selects the instructed text and graphics information program and converts the text and graphics information into text and graphics images using the character generator 9 as necessary according to the contents of the program stored in the ROM 5. It is converted and stored in the display memory 7.

The character and graphic images stored in the display memory 7 are synthesized into the RGI3 signal by the display processing circuit 6. Additionally, the additional sound data included in the character/graphic information is processed by the additional sound decoder 8.
is converted into an additional sound signal by

On the other hand, the audio signal and video signal demodulated by the television receiving circuit 22 are input to and processed by the audio demodulation amplification circuit 23 and the brightness amplification/color demodulation circuit 24, respectively, and then input to the video/audio switching circuit 25. . The video/audio switching circuit 25 is
The video signal (RG
B signal) and audio signal (additional sound signal), and the video signal and video signal of the television, the former is selected when displaying a character and graphic image, and the latter is selected when displaying a television image, Audio amplification output circuit 26
, are input to the speaker 28 and the display unit 29 through the video amplification output circuit 27, respectively. Through the above operations, the user can display the selected character/graphic information on the display section 29.

In teletext broadcasting currently in practical use, text and graphic information for the same program number is repeatedly transmitted at a standard cycle of 20 seconds. If a program of text and graphic information is composed of a plurality of pages, one page is sent out every 20 seconds in the order of page numbers. If the user specifies only the program number of the text/graphic information and leaves the page number undefined, a screen is displayed on the display unit 29 each time the text/graphic information of each page of the corresponding program number is received. When the user specifies both a program number and a page number, if the number of pages of the program is large, it is necessary to wait for a while until the selected page is received.

In the teletext receiving apparatus shown in FIG. 4, the user requests the microprocessor circuit 2 for a program of character and graphic information to be stored in the RAM 4 by operating the keypad IO. The microprocessor circuit 2 stores the requested text/graphic information program in the RAM 4 every time it receives it.

When a user specifies both a program number and a page number and requests display of text/graphic information, if the corresponding text/graphic information is stored in the RAM 4, it is immediately displayed on the display section 29, reducing the waiting time. do not need.

Problems to be Solved by the Invention However, in the teletext receiving apparatus configured as described above, when you want to view text and graphics information with the same program number but a different page number as the text and graphics information displayed on the display section,
When the corresponding character/graphic information is not stored in the RAM 4, there is an inconvenience that requires waiting time. Also, R
In order to specify the character/graphic information to be stored in the AM4, the user must operate the keypad 10 to specify the program number, which is a complicated operation.

In view of the above problems, the present invention provides a method for immediately displaying the corresponding text and graphic information when a different page of a program displayed on the display section is selected, without requiring complicated operations by the user. The purpose of this invention is to provide a teletext receiving device that can perform teletext broadcasting.

Means for Solving the Problems To achieve this object, the teletext receiving apparatus of the present invention includes a decoding means for decoding encoded character and graphic information and converting it into image information, and a decoding means for decoding encoded character and graphic information and converting the encoded character and graphic information into image information. a memory for storing information; a reservation registration means for registering a program number of the text and graphics information converted into image information by the decoding means as a program number of the text and graphics information stored in the memory; and registration by the reservation registration means. When receiving the text/graphic information, the program reservation means stores the text/graphic information in the memory, and selects the text/graphic information of the specified number from among the received text/graphic information and the text/graphic information stored in the memory. and data selection means to be input to the decoding means.

Effect of the present invention With the above-described configuration, when text and graphics information is decoded and displayed on the display section, the program number of the displayed text and graphics information is registered, and thereafter, the text and graphics information of each page of the registered program number is is stored in the memory each time it is received, so it is possible to view text and graphics information of a different page with the same program number as the text and graphics information displayed on the display unit without waiting time. Further, since the program to be stored in the memory is automatically reserved and registered, there is no need for complicated operations by the user.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of a teletext receiver according to an embodiment of the present invention.

In FIG. 1, 3 is a receiving circuit, 4 is a RAM, and 5 is an RO.
M, 6 is a display processing circuit, 7 is a display memory, 8 is an additional sound decoder, 10 is a keypad, 20 is a television signal receiving section, 21 is an antenna, 22 is a television signal receiving circuit, 23 is an audio demodulation amplifier circuit, 24 is a luminance amplification color demodulation circuit, 25 is a video/audio switching circuit, 26 is an audio amplification output circuit, 27 is a video amplification output circuit, 28 is a speaker, and 29 is a display section, which is the same as the configuration shown in FIG. 3. be. Further, 2 is a microprocessor circuit including data selection means 11, reservation registration means 12, and program reservation means 13.

14 is a memory that stores character and graphic information.

The operation of the teletext receiving apparatus configured as described above will be described below.

The teletext receiving apparatus of this embodiment can basically operate in the same manner as the conventional teletext receiving apparatus shown in FIG.

FIG. 2 shows the configuration of the memory 14 in FIG. 1. In Figure 2, a, b, c, d.

e and f are areas for storing character and graphic information for one screen, respectively. By the program reservation means 13 in FIG. 1, text and graphics information is stored in the area of the memory 14 in the order of a, b, c, d, e, f, and after f, it is stored in the order from a. be done. In this way, the memory 14 stores character and graphic information for the latest five screens.

FIG. 3 shows an example of the structure of character/graphic information. The character/graphic information is divided into several packets and sent out. One packet of management information is added to the character/graphic information. The management information includes information regarding the program number and page number of the character and graphic information.

When the user operates the keypad 10 to designate the number of text/graphic information to be displayed on the display section 29, the data selection means 1 of the microprocessor circuit 2 selects the text/graphic information of the designated number. The selected character/graphic information is decoded by the microprocessor circuit 2 and stored in the display memory 7 as image information. Further, the program number of the decoded character/graphic information is stored in the reservation registration means 12.
Registered by. Thereafter, each time the program reservation means 13 receives character and graphic information, it compares the program number with the number registered in the reservation registration means 12, and if they match, it stores the character and graphic information in the memory 14. In this way, the text and graphics (ff 11) of each page of the same program as the text and graphics information displayed on the display section 29 can be stored in the memo 1/4 without any complicated operations, and there is no waiting time. You can view information on each page.

Effects of the Invention As described above, according to the present invention, a combination means for combining encoded character/graphic information and converting it into image information, a memory, a reservation registration means, a program reservation means, and a data selection means are provided. With this, the text and graphics information of each page of the same program as the text and graphics information displayed on the display section can be viewed without waiting time, and no complicated operations are required.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of a teletext receiver according to an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of the memory 14 in FIG. 1, and FIG. 3 is a diagram showing an example of the configuration of text and graphic information. , FIG. 4 is a block diagram of a conventional teletext receiver. 2...Microprocessor circuit, 11...
...Data selection means, 12...Reservation registration means,
13...Program reservation means, 14...Memory. Agent's name Patent attorney Shigetaka Awano Baka Technological name Figure 2

Claims (1)

[Claims] a decoding means for decoding the encoded character and graphic information and converting it into image information; a memory for storing the encoded character and graphic information; and a program number of the character and graphic information displayed on the screen is stored in the memory. a reservation registration means for registering the character and graphic information to be registered as a program number; a program reservation means for storing the received character and graphic information in the memory upon receiving the character and graphic information registered by the reservation registration means; and a program reservation means for storing the received character and graphic information in the memory. 1. A teletext receiving apparatus comprising data selection means for selecting character and graphic information of a specified number from among the character and graphic information that is displayed and inputting the selected character and graphic information to the decoding means.