JPH03186085A - Teletext receiver - Google Patents

Abstract

PURPOSE:To display a picture superimposingly for teletext of other channel onto a picture of a television broadcast by providing two tuners, using one tuner for a conventional television broadcast reception and using the other tuner for a teletext broadcast reception. CONSTITUTION:A 2nd tuner 11 able to receive a television broadcast of a different channel from a 1st tuner 2 is attained via an antenna 1 and outputting a video signal of a received television broadcast to a superimposing circuit 10 and a synchronizing separator section 12 separating a synchronizing signal from the video signal of the television broadcast received by the 2nd tuner 11 and outputting it to a display control section 4 are provided. Then a switching signal of the superimposing circuit 10 is outputted synchronously with the synchronizing signal from the display control section 4 and the control section 5 controls the 1st and 2nd tuners 2, 11 in response to the reception command of the teletext broadcast and the television broadcast. Thus, the picture of the teletext broadcast of other channel is superimposingly displayed on the picture of the television broadcast.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a teletext receiver that receives teletext broadcasts as new media, and more specifically, to a teletext receiver that receives teletext broadcasts as new media, and more specifically, a system for viewing teletext broadcasts and regular television broadcasts on one screen. The present invention relates to a teletext receiver that can be used for teletext broadcasting.

[Conventional example] In recent years, the number of teletext programs and information has increased, and the number of teletext receivers has increased. Some teletext receivers have a superimpose function, and these teletext receivers have the configuration shown in FIG. 2, for example.

In this figure, a teletext receiver having a superimposed display function includes a tuner 2 that receives television broadcasts of a predetermined channel via an antenna 1;
a teletext decoder 3 that obtains teletext data superimposed on the television broadcast received by the teletext decoder 3, and a display control unit that writes display data corresponding to the teletext data into a V-RAM 8 (described later) and obtains display data of one teletext broadcast. 4, a control section 5 that controls the tuner 2 and the teletext decoder 3 and transfers the teletext data to the display control section 4, and a memory section 6 that stores a control program for the control section 5, etc.
C, G, (character generator) ROM 7 that stores display data corresponding to the above teletext data
and V-RAM for displaying the display data on the screen.
8, an RGF encoder 9 that converts the display data of this V-RAM 8 into R, G, and H video signals, a video signal obtained by this RGB encoder 9, and a video signal of the television broadcast received by the tuner 2. A superimpose circuit 10 that overlaps the above is provided.

When superimposed display is instructed, the display control section 4 outputs a switching signal between a video signal for television broadcasting and a video signal for text broadcasting in response to the instruction. In response to this switching signal, the superimpose circuit 10 switches the image of the television broadcast or the teletext broadcast, and the image of the teletext broadcast is superimposed on the image of the television broadcast on one side (tj2+not shown).

[Problems to be Solved by the Invention] However, in the above-mentioned teletext receiver, the image displayed in a superimposed manner is the result of one television broadcast and a teletext superimposed on this television broadcast, For example, if a teletext horse racing program is broadcast by NHK (Japan Broadcasting Corporation), but the horse racing is broadcast by a commercial broadcasting station, then the teletext horse racing program and the private broadcasting station are broadcast on one screen. It was impossible to display the horse racing broadcasts overlappingly.

This invention was made in view of the above problems, and its purpose is to provide a teletext receiver that can display teletext images of other channels superimposed on images of television broadcasts. be.

[, ([Means for Solving the Problem] 1- In order to achieve the object, the present invention separates teletext superimposed on a television broadcast, and displays the separated teletext on the screen of a television receiver. In a teletext receiver that displays a teletext receiver, a first and second tuner that receives the television broadcast described in -, and an image of the teletext superimposed on the received television broadcast of the first tuner and the second tuner. and superimposing means for superimposing images of received television broadcasts.

[Operation] With the above configuration, the first tuner and the second tuner receive television broadcasts of different channels. Therefore, if the first tuner is used for teletext broadcasting and the second tuner is used for television broadcasting, for example, the first tuner can receive NHK teletext broadcasts, and the second tuner can receive broadcast stations other than NHK. TV broadcasts can also be received. Therefore, on both sides, an image of a teletext broadcast of a channel other than the television broadcast can be superimposed on an image of the television broadcast.

[Example] Hereinafter, an embodiment of the present invention will be explained based on FIG. 1.

In addition, in the figure, the same parts and corresponding parts as 2v14 are given the same reference numerals, and repeated explanations are omitted.

In this figure, the 1-character broadcast receiver is capable of receiving television broadcasts on a channel different from that of the first tuner 2 through an antenna 1, and outputs the video signal of the received television broadcasts to a superimpose circuit 10. second tuner 1
1, and a synchronization separation section 12 that separates a synchronization signal from the video signal of the television broadcast received by the second tuner 11 and outputs it to the display control section 4. Therefore 1
In the display control section 4, the switching signal of the superimpose circuit 10 is outputted in synchronization with the synchronization signal from the synchronization separation section 12, and in the control section 5, a reception instruction for teletext and television broadcasting is output. Control (channel control) of the first and second tuners 2.11 is performed accordingly.

Next, the operation of the teletext receiver having the above configuration will be explained.

First, suppose that NHK's horse racing program is selected as a teletext broadcast, horse racing broadcasts from 12 channels are selected as a TV broadcast, and an instruction to display them in a superimposed manner is given in /1). The second tuner 11 receives NHK television broadcasts, and the second tuner 11 receives television broadcasts of 12 channels. Then, in the display control unit 4, the display data corresponding to the text broadcast data of the horse racing program is changed to V-RA in synchronization with the autumn signal of the horse racing broadcast.
Read from M8. This display data is output to the RGB encoder 9 and converted into a video signal.

On the other hand, the video signal of the television broadcast (FI horse broadcast) by the second tuner 11 is input to the superimpose circuit IO, and the display control unit 4 sends the horse racing program according to the superimpose display instruction. A switching signal for switching between a video signal and a video signal for horse racing broadcasting is sent to the synchronization separation unit 12.
Output in synchronization with the synchronization signal from. As a result, the superimpose circuit 10 outputs the switched video signal, so that on both sides (not shown), an image in which the horse racing program (TV broadcast of the horse racing broadcasting channel 02 channel) is superimposed on the horse racing program (NHK teletext) is output. It will be displayed.

in this way. Since an image of a television broadcast of a certain channel and an image of a teletext broadcast superimposed on a television broadcast of another channel can be displayed in a superimposed manner, the use of teletext broadcasting can be expanded.

[Effects of the Invention] As explained above, according to the present invention, a teletext receiver having a superimpose function is provided with two tuners, one tuner is used for receiving normal television broadcasts, and the other tuner is used for receiving normal television broadcasts. Since the tuner was designed for teletext reception,
It is possible to superimpose an image of a teletext broadcast on another channel onto an image of a certain television broadcast, which has the great effect of expanding the use of teletext broadcasts.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a teletext receiver showing an embodiment of the present invention, and FIG. 2 is a schematic block diagram of a conventional teletext receiver. In the figure, -1 is an antenna, 2 is a first tuner, 3 is a teletext decoder, 4 is a display control unit, and 5 is a control unit (CPU)
, 6 is the memory section (ROM, RAM), 7 is C, G, (character generator L/-ta) ROM, 8 is V-RAM
, 9 is 1 (GIJ encoder), 10 is a superimpose circuit, 11 is a second tuner, and 12 is a sync separator.

Claims (1)

[Claims] (1) Separate the teletext superimposed on the television broadcast,
A teletext receiver that displays the separated teletext on the screen of the television receiver, comprising: first and second tuners that receive the television broadcast; and characters superimposed on the television broadcast received by the first tuner. A teletext receiver comprising: superimposing means for superimposing a broadcast video and a television broadcast video received by the second tuner.