JPS58209276A - Character broadcasting receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to improvements in teletext receivers.

Teletext broadcasting in which a character signal is multiplexed and transmitted over a portion of the vertical blanking period of a television signal, and a screen made up of the character signal can be displayed on the cathode ray tube of a 94g machine as required by the user. Recently, it has been attracting attention as a next-generation information service.

These teletext programs include independent programs that are completely unrelated to the content of the teletext screen or the text signal of the multiplexed TV broadcast, and independent programs that are directly related to the content of the teletext screen or the content of the TV broadcast. However, for example, there are supplementary programs that can superimpose dialogues from TV dramas on the TV screen (however, even independent programs may be superimposed on the TV screen). And this supplementary program is given a specific Qiao-gumi Aogo with a Tomimuki addition □. However, these supplementary programs are primarily intended to supplement television broadcasts. Therefore, when a user is watching a TV program and wants to receive subtitles via text broadcasting, the user usually requests the reception of the supplementary program by inputting the program number of the supplementary program using a keyboard or the like. . However, in conventional teletext receivers, the teletext power of the supplementary string for the TV program being received)
It was extremely inconvenient for the user to be unable to know at any time whether or not the broadcasting service was in progress. In other words, TV programs are displayed on screen about once every few minutes [subtitle service is available on Teletext 99]. ” etc. will be displayed.
Users who watch this TV program after this message is displayed will not be able to tell whether it is a supplementary program or a broadcast service is being broadcasted until this message is displayed next, and in the end, they will not be able to tell whether the program is being broadcast or not by using the keyboard. It was extremely inconvenient to find out whether there was a supplementary program available until I made a request to receive it.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional teletext receiver described above and to provide a teletext receiver that allows the user to know at any time whether or not there is a complementary program broadcast service.

In order to achieve the above object, the first invention in this feature includes a means for identifying whether a received character signal is a character signal of a complementary program, and approximately a certain period of time from the time when the identifying means identifies the complementary program. A teletext receiver is provided with a display drive means that outputs a single display drive output for a period of time, and a display means that is driven by this display drive output to notify that a complementary program is in broadcast service. When this is the case, a display is made to indicate this.

In addition, the second invention of the present invention is that in order to display a list of program numbers of teletext broadcasts in a teletext receiver, all program numbers in the broadcast service are stored in the memory. Noting that a specific program number indicating a supplementary program is stored in this memory or not is appropriately referred to, and depending on the result, controls a display means to notify that the supplementary program is in broadcast service. It was designed to do so.

Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.

The first part is a block diagram of an embodiment of the present invention. In the figure, 1 is a signal acquisition circuit that extracts a character signal from a detected television signal, 2 is a program number identification circuit that identifies the program number added to the character 1g, and 5 is a program that is manually input from the keyboard 4 to show the remaining programs. A comparison circuit compares the program number of the received character signal with the program number of the received character signal, which is stored in the number code IM circuit 5. 6 is the comparison circuit 5 which compares the program number in the matched character code. An address setting circuit 8 sets the write destination address of data etc. in the display memory 7, and 8 is a memory 1 for reading out the contents of the display memory 7 and displaying it on a cathode ray tube (not shown).
9 is a supplementary program identification circuit that identifies the letter fg of the supplementary program; 10 is a retriggerable monostable multivibrator; 11 indicates that the supplementary program is in broadcast service when it is lit; However, it is a display element.

In the teletext receiver shown in FIG. 1, when the program number of the received character signal matches a specific program number (there may be more than one) indicating a complementary program, the complementary program identification circuit 9 identifies it. Then, the monostable multivibrator 10 is triggered and a pulse signal of a constant width is output from the monostable multivibrator 10, and the display element 11 is lit by the pulse (g). The pulse signal output from the multivibrator 10 is a pulse signal with a long time width, approximately from several tens of seconds to several minutes. This is to allow the display element 11 to continue lighting during this period since there may be no output at all for about 10 seconds.Furthermore, the monostable multivibrator 10 can be retriggered even while pulse fg is being output. Since it is of a similar type, the display element 11 can be turned on almost continuously during the teletext broadcast service of the supplementary program.

Note that the complementary program identification circuit 9 identifies the complementary program by a specific program number indicating the complementary program. In the case of teletext broadcasting, it is obvious that this special control code or the like may be detected to identify the complementary program.Furthermore, the nest stabilizing multivibrator 10 obtains a pulse signal of 1 o for a long time. For this purpose, a plurality of monostable multivibrators connected in series may be used, or instead of the monostable multivibrator 10, a complementary program identification circuit 9 or a clock signal supplied separately when a complementary program is identified (for example, the vertical Sync 1
It is also clear that a similar display drive output can be generated using a counter that starts counting, counts a fixed number, and then stops. Also monostable multivibrator 10
The bistable multivibrator is used to light up the display element 11 without using the bistable multivibrator, and the bistable multivibrator is set by the output of the complementary program identification circuit 9, and the output from the complementary program identification circuit 9 is set again within a certain period of time. It is clear that a similar function can be achieved by providing means for resetting this bistable multivibrator when there is no output.

Furthermore, it is clear that instead of using the display element 11 to notify that a supplementary program or broadcast service is in progress, this fact may be displayed in text or symbols on the TV screen that is being received.71) In this case, it is necessary to display the text or symbol only when receiving television.

Incidentally, many of the recent teletext receivers are equipped with a micro combinator and perform processing according to a processing program recorded in a non-volatile memory.

In such a teletext receiver, in the block diagram shown in FIG. 1G, the program number identification circuit 2. Comparison circuit 3゜Selected program storage circuit 5. Address setting circuit 6. It is obvious that the complementary program identification circuit 9 or the monostable multivibrator 10 can be programmed into a processing program and processed by a microcomputer.

FIG. 2 is a block diagram showing another embodiment of the invention.

In the figure, 1 is a signal extraction circuit that handles the character ID from the detected TV signal, and 2 is the character 1? A program number identification circuit that identifies the program number added to No. J; 3 is a user input input from the keyboard 4 and is stored in the selected program number storage circuit 5) program number of the requested program number and the received character signal; A comparison circuit 6 compares the numbers; 6 is a comparison circuit 3; an address setting circuit 8 sets the program number L) to write the pattern data in the matched character signal in the display memory 7; A memory reading circuit for reading out the answer and displaying it on a cathode ray tube (not shown).16 is a character signal dedicated to transmitting the program number of the character 1iK transmission in the broadcasting service, and a PIF that identifies the program index bucket (hereinafter abbreviated as PIF). , 4.1 Separate circuit 1
5 is a data memory for storing the program number transmitted by the PIF (however, the blank space of the display memory 7 may be used); 15 is a generation circuit for pattern data corresponding to the program number; 12 is an oscillation circuit; 14 is a complementary program identification circuit for identifying whether a specific program number indicating a complementary program is stored in the data memory 10; 14 is a 7-lip 70-tub;
Reference numeral 11 is a display element which, when lit, indicates that a complementary program is being broadcasted.

In the teletext receiver shown in FIG. 2, by storing the program numbers of teletext broadcasts in the broadcasting service transmitted by PiP in the data memory 16, the user can display a list of program numbers using the keyboard 4. When searching for information, the program numbers stored in the data memory 13 are read out, pattern data corresponding to each program number is obtained by the pattern generation circuit 15, and the data is written in the display memory 7 to generate a list of program numbers. This is for displaying a table.

In FIG. 2, the program number stored in the complementary program identification circuit 9 or the data memory 15 is referred to at an appropriate cycle determined by the oscillation circuit 12, and when a complementary program is identified, the flip 70 knob 14 is set and the program is identified. 7 when it wasn't there
The flip-flop 14 is reset and the display element 11 is lit by the output of the flip-flop 14.

Note that it is not limited to the oscillation circuit 12 that drives the supplementary program identification circuit 9 at an appropriate period to refer to the data memory 16, but may also be driven at the field period of the television signal, a period obtained by dividing the field period, or a period approximately close thereto. It is obvious that the driving may be performed, or it is also obvious that the driving may be performed, for example, when the PIF identification circuit 16 identifies the PIF instead of at a fixed period.

Also, rather than using the display element 11 to notify that a supplementary program or broadcast service is in progress, is it clear that it may be possible to display that fact in text or symbols on the TV screen that is being watched? In this case, is it necessary to display the text or symbol only when receiving television?

Note that many recent teletext receivers are equipped with a microcomputer and perform processing according to a processing program recorded in a nonvolatile memory.In such a teletext receiver, the program number identification circuit 2 in the block diagram shown in FIG. ．． Comparison circuit 5゜Selected program number storage circuit 5. Address setting circuit 6゜PIF identification circuit 16. It is obvious that the pattern generation circuit 150, oscillation circuit 12, complementary program identification circuit 9, etc. can be programmed into a processing program and processed by a microcomputer.

As described above, according to the present invention, it is possible to provide a teletext receiver that allows the user to know the presence or absence of a complementary program broadcast service at any time, thereby greatly improving operability. be able to.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are block diagrams each showing an embodiment of the present invention. Code explanation 1...1g sampling circuit, 2...Program number identification circuit, 6...Comparison circuit, 4...Keyboard, 5
...Selected program number storage circuit, 6.Address setting circuit, 7.Display memory, 8.Memory reading circuit,
9... Complementary program identification circuit, 10... Monostable multi, 11... Display element, 12
...Oscillation circuit, 15...Data memory, 14...
7 lip-flop, 15...pattern generation circuit. Representative Patent Attorney Susuki 1) Toshiyuki 2 1 Illustration Z Figure

Claims (1)

[Claims] 1) A method for receiving and displaying the content of a teletext screen or a teletext of a complementary program related to the content of a television broadcast in which the text signals constituting the screen are multiplexed. In the teletext receiver, an identification means for identifying that a received character signal is a character signal of a complementary program, a display means, and a driving means for recommending the display means for a certain period of time based on the identification result of the identification means. What is claimed is: 1. A teletext receiver comprising: a teletext receiver capable of displaying that a complementary program is being broadcasted; 2) The content of the teletext screen is 4! ! In a teletext receiver capable of receiving and displaying the teletext of a complementary program related to the contents of the television broadcast in which the teletext signals are multiplexed, the memory stores the program number of the teletext in the broadcasting service. an identification means for referring to the memory and identifying that a complementary program is stored; and a display means; and when the identification means identifies that a complementary program is stored, the display means is set. , and means for resetting if the complementary program is not identified, and is capable of displaying that the complementary program is being broadcasted.