JPS58147284A - Receiver of character multiplex broadcast - Google Patents

Abstract

PURPOSE:To eliminate the need for checking whether or not the content of a desired program is renewed, by bringing the TV reception state into the character multiplex reception mode, only when the content of the desired program is renewed. CONSTITUTION:In depressing a renewal waiting switch 8 after the desired program is selected, the output is inputted to a renewal waiting switch driving circuit 7 to be the renewal waiting state, and an indicating lamp 9 is lighted. A TV/character multiplex changeover switch 4 is turned to the TV position to obtain the TV reception. Further, when a code representing the presence of renewal in the signal of the desired program is transmitted, an output is produced at a terminal 6b of a character multiplex decoder 6, a renewal waiting switch driving circuit 7 is driven, the switch 4 is automatically turned to the character multiplex position, and the desired program having the updated content is displayed on a CRT5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a teletext broadcasting receiver, and is particularly intended to improve the waiting time compared to the United States when there is a shortage of programs.

Regarding the selection of text multiplex programs, the transmission is approximately 8 times per program.
Because the program is sent in seconds, it only takes a few seconds or two to get the program you want. Various proposals have been made regarding what state the TV receiver should be in during this waiting time.

One of them is the time indication button, and when you key in the desired program and press the &au record expiration date button, it becomes a normal TV reception letter, and when the desired program arrives, a text multiplex Il!
There is a self-restrictive switch towards the I direction.

However, it is normal for the same im-circle contents of the same program to be sent repeatedly, and the contents are updated at appropriate timings. Therefore, once you have watched l1gJ, most of the content will be the same the next time you watch it.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it is a timing key that changes to the character-contingency reception mode from the "V receipt level" only when the contents of the 4 sets of cloth violet are updated. Our goal is to provide a teletext broadcasting receiving device equipped with the following.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In the figure, (1) is the antenna, (2) is the tuner IF/transverse wave circuit, -(3) is the sandwich amplifier circuit, (4) is the TV/character multiplexing switch 8W, (5) is the character Multiple Tecoder, (7) is update time SW secret sea bream circuit, (8) is update time 8
W, (9) is an update time display lamp. Antenna (1
) is transversely waved by the tuner/IF-detection circuit (2) and converted into a hiteo signal. This Hiteo bond is a movie
It is converted to tjlI width by the iLt11 width circuit (3), passes through the TV/character multiplexing circuit 5W (4), and is displayed on C1tT (s). The video signal is also supplied to the Mojitaden nacoder (June), and the desired program is decoded and stored in the memory. This text multiplex signal is read out from the memory and the TV/text multiplex switch 8W (4) When CEI' (
5) will be displayed. By the way, the number of programs on text broadcasting is about ten or so, and the content is the same every time9 and is updated from time to time (for example, news, etc.).
(weather forecast, etc.), so even if you select a news program, the content is likely to be the same as before. Therefore, the present invention makes use of the fact that when the content of the # group is updated, there is a code in the signal indicating that it has been updated, and when this code is detected, one character is automatically multiplexed from the energized TV reception. This is used to switch to the program display. To explain in detail, first select the desired program and then press the update time 8W (8).The output is sent from the terminal (7b) to the update time sW secret circuit (
7), and the update time indicator lamp (9) lights up at this point. Then, the TV/character multiplex switch 8W (4) becomes the TV side, and at the 10,000 character multiplex tecoder (6) which serves as TV reception, a code indicating that there is an update is sent to the signal of the desired program and is supplied to the terminal (7a) of (7). . Since the update time 8W hidden circuit (7) is in the update time state, the TV/character multi-channel switch 5W (4) automatically switches to the multi-character display side and displays the desired updated content on the CRT (5). The program will be displayed.

As described above, according to the present invention, by providing the update time 8W, it is no longer necessary to select cloth number M each time to check whether the contents have been updated, and only when it is automatically updated, there are more characters than TV reception. Switch to salt reception, so
Its merit: It has the effect of remarkable improvement.

[Brief explanation of drawings]

This is a block diagram of a teletext receiver according to an embodiment of the present invention. In the figure, (1) is the antenna, (2)
is the tuner IF-model e1gItilt,
(3) C video tel m circuit, (4) '1'V/character multiple storm switching 8W, (5) CRT, (a) character multiplex tecoder, (7) update FF period SW secret circuit. (In August, the update time is 8W, (9) is the update time display lamp. Agent Shin Kuzuno -

Claims (1)

[Claims] A teletext broadcasting receiving device having an a-function that remains in an energized television reception state until the content of a desired program among teletext programs is updated.