JPH05328319A - Television receiver - Google Patents

Abstract

PURPOSE:To update a teletext program reserved by a user to always the latest one in a television(TV) receiver having a two-screen function and incorporating plural tuners. CONSTITUTION:A switching means 60 is provided between a teletext processing part 90 and respective tuners 10, 20. Thus, the teletext program reserved by a user can be updated to always the latest one by connecting the tuner which is not used at present out of the two tuners 10, 20 to the processing part 90.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver which has a teletext broadcasting display device, has another screen smaller than the screen, that is, a so-called dual screen display function, and has at least two tuners. It is a thing.

[0002]

2. Description of the Related Art In recent years, a two-screen display has a large screen (hereinafter referred to as a parent screen) and another small screen displayed in the main screen (hereinafter referred to as a child screen), which is an independent television. An increasing number of television receivers have two built-in tuners for displaying the John broadcast. On the other hand, a television receiver with a built-in teletext display device generally has one tuner.

A description will be given below with reference to the drawings. FIG. 2 is a block diagram of a conventional television receiver. In FIG. 2, 10 is a tuner, 30 is an external video device input, and 70 is a video processing unit. Reference numeral 90 is a character multiplex broadcast processing unit that extracts and demodulates the character multiplex broadcast superimposed on the video signal, and 100 is a program reservation table in which the user reserves and registers programs of the character multiplex broadcast. Reference numeral 110 denotes a program content storage memory that stores a corresponding program in the output of the text multiplex broadcast processing unit 90 according to the content of the program reservation table 100. Reference numeral 46 is a switching means for connecting either one of the tuner 10 and the external video equipment input 30 to the video processing section 75.

The operation of the conventional television receiver configured as described above will be described. The text multiplex broadcasting processing unit 90 reads out one entry from the program reservation table 100 and stores the corresponding program in the program content storage memory 110 when the corresponding channel is tuned in the tuner 10. However, if the tuner 10 is tuned to a different channel, the next entry is read from the program reservation table 100, the tuning channel is checked, and if the tuner 110 is tuned, the program 110 is stored. If not synchronized, the next entry is read and the α operation is repeated.

[0005]

However, in the above conventional configuration, the programs stored in the program content storage memory of the character multiplex broadcast are limited to the channel viewed on the screen, and are registered in the reservation tables of other channels. There is a problem in that the teletext program that is being used is not updated.

The present invention is an invention relating to a television receiver for solving the above problems.

[0007]

At least two tuners, a video processing section 1 for demodulating an output of the tuner into a video signal, a video processing section 2, one or more external video equipment input sections, and the video. A switching circuit for displaying the output of the processing unit 1 and the output of the video processing unit 2 on the screen, or outputting only one of them on the screen, and a plurality of the tuners and a plurality of the external video devices in the video processing unit 1. Switching means 1 for selecting and connecting one of the inputs, switching means 2 for selecting and connecting one of the plurality of tuners and a plurality of the external video equipment inputs to the video processing section 2, and a video signal A character multiplex broadcasting processing unit for demodulating the superimposed character multiplex broadcasting, a program reservation table for reserving programs of the character multiplex broadcasting,
According to the contents of the program reservation table, a program content storage memory for accumulating a corresponding program out of the output of the character multiplex broadcasting processing unit and a switching means 3 connected to the character multiplex broadcasting processing unit are provided.

[0008]

With this configuration, it is possible to update all the programs registered in the character multiplex broadcast reservation table or the program storage memory for more character multiplex broadcasts than before by using an unused tuner.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a television receiver according to an embodiment of the present invention. In FIG. 1, 10 is a first tuner and 20 is a second tuner. Reference numeral 30 is an external video device input unit, 70 is a parent video processing unit that performs video processing of the parent screen, and 80 is a child video processing unit. Reference numeral 130 denotes a screen switching circuit that switches between cases where both the video signal output from the parent video processing unit 70 (hereinafter referred to as the parent video signal) is displayed. Reference numeral 90 is a character multiplex broadcast processing unit that extracts and demodulates the character multiplex broadcast superimposed on the video signal, and 100 is a program reservation table in which the user reserves and registers programs of the character multiplex broadcast. Reference numeral 110 denotes a program content storage memory that stores a corresponding program in the output of the character multiplex broadcasting processing unit 90 according to the content of the program reservation table 100. Reference numerals 40, 50 and 60 denote switching means for connecting one signal of the tuner 10, the tuner 20, and the external video device input unit 30 to the parent video processing unit 70, the child video processing unit 80, and the character multiplex processing unit 90, respectively. ..

The operation of the television receiver configured as described above will be described. (1) In the screen switching circuit 130, the parent video processing unit 70
If the output of is displayed on the screen.

If the tuner 10 is connected to the parent video processing section 70 by the switching means 40, the switching means 6
0 connects the tuner 20 to the teletext broadcasting processing unit 90.

On the contrary, when the tuner 20 is connected to the parent video processing section 70, the switching means 60 causes the tuner 10 to operate.
Is connected to the character multiplex broadcasting processing unit 90, and in the same manner as described above, the character multiplex broadcasting processing unit 90 reads each entry from the program reservation table 100, switches the tuner 20 to the corresponding channel, and stores the corresponding program in the program content storage memory 110. Accumulate in. (2) In the screen switching circuit 130, the parent video processing unit 70
When the outputs of the child video processing unit 80 and the child video processing unit 80 are both displayed on the screen, and both the parent video processing unit 70 and the child video processing unit 80 are connected to the external video device input unit 30. If you are.

The switching means 60 connects an unused tuner to the character multiplex broadcast processing section 90. In the character multiplex broadcasting rib 90, the program is accumulated in the program content accumulation memory 110 by the same process as (1). (3) In the screen switching circuit 130, the parent video processing unit 70
And the outputs of the child video processing unit 80 are both displayed on the screen, and both the parent video processing unit 70 and the child video processing unit 80 are connected to the tuners 10 and 20, respectively.

When the tuner 10 and the tuner 20 tune in the same channel, the switching means 50 connects the tuner 10 and the child video processing section 80, and the switching means 60.
Connects the vacant tuner 20 to the teletext broadcasting processing unit 90. The character multiplex broadcasting processing unit 90 accumulates the corresponding program in the program content storage memory 110 by the same processing as (1).

Even when the tuner 10 and the tuner 20 are synchronized with each other in different channels, the character multiplex broadcasting ribs 90 are read from the program reservation table 100 one entry at a time, and the corresponding channel is the tuner 10 or the tuner 2.
If it is tuned to 0, the corresponding program is stored in the program content storage memory 1
Accumulate to 10. If not synchronized, an operation for reading the next entry from the program reservation table 100 is performed.
In this case, the expected value is double that of the conventional television receiver.

As described above, it is possible to always update the contents of the program storage memory of the character multiplex broadcasting to the latest one by using the tuner which is not used in this embodiment, and the two tuners are both in use. Even so, it has a double expected value compared to the conventional television receiver.

[0017]

As described above, the present invention has two or more tuners, at least two tuners, a video processing section 1 for demodulating the output of the tuners into a video signal, a video processing circuit 2, and one or more. An external video device input section, a switching circuit for simultaneously displaying the output of the video processing section 1 and the output of the video processing section 2 on the screen, or outputting only one of them on the screen, Switching means 1 for selecting and connecting one of the tuner and one of the plurality of external video equipment inputs, and selecting and connecting one of the plurality of tuners and one of the plurality of external video equipment inputs to the video processing circuit 2. According to the contents of the switching means 2, the character multiplex broadcast processing unit for demodulating the character multiplex broadcast superimposed on the video signal, the program reservation table for reserving the programs of the character multiplex broadcast, and the program reservation table. Before A television receiver having a dual-screen display function, which is provided with a program content storage memory for accumulating a corresponding program out of the output of the character multiplex broadcast processing section and a switching means 3 connected to the character multiplex broadcast processing section, It is possible to update the contents of the character multiplex program storage memory to the usual latest one by using an unused tuner.

[Brief description of drawings]

FIG. 1 is a block diagram of a television receiver according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional television receiver.

[Explanation of symbols]

 10, 20 Tuner 30 External video equipment input section 40, 50, 60 Switching means 70 Parent video processing section 80 Sub video processing section 90 Character multiplex broadcasting processing section 100 Program reservation table 110 Program content storage memory

Claims (4)

[Claims] 1. A plurality of tuners, video processing units provided in the same number as the tuners for demodulating the output of each tuner into a video signal, an external video equipment input unit, and outputs of the video processing unit displayed on the screen. A screen switching circuit for switching signals, a switching unit 1 for selecting and connecting signals from the plurality of tuners and an external video equipment input unit to the image processing unit 1, and a plurality of tuners and the outside for the image processing unit 2. Switching means 2 for selectively connecting a signal from the video device input section, a character multiplex broadcasting processing section for demodulating the character multiplex broadcasting, a program reservation table for reserving programs of the character multiplex broadcasting, and contents of the program reservation table According to the output of the character multiplex broadcasting processing unit, a program content storage memory for storing a corresponding program, and either the video processing unit 1 or the video processing unit 2 on the screen. A television receiver comprising switching means 3 for connecting a tuner not connected to a video processing section displayed when one output is displayed on an image to the teletext broadcasting processing section. .. 2. Even when the output of the video processing unit 1 or the video processing unit 2 is simultaneously displayed on the screen, an external video equipment input unit is selected for one or both of the video image processing units. 2. The television receiver according to claim 1, further comprising switching means 4 for connecting an unused tuner to the character multiplex broadcast processing unit when the television tuner is not used. 3. Even when tuners are connected to both video processing units, the outputs of the tuner connected to the video processing unit 1 and the tuner connected to the video processing unit 2 are output as described above. The switching means 5 which distributes to both the video processing section 1 and the video processing section 2, and the tuner which is not connected to any of the video processing section 1 and the video processing section 2 by the function of the switching means 5 are subjected to character multiplex broadcasting. The television receiver according to claim 2, further comprising a switching means 6 connected to the processing circuit. 4. When a video displayed on the screen is switched from the input of the external video device to a television broadcast, a tuner not connected to the character multiplex broadcast processing unit is preferentially connected to the video processing unit. The television receiver according to claim 1, further comprising a switching unit 7 for switching.