JPH02266682A - Teletext broadcast receiver - Google Patents

Abstract

PURPOSE:To simplify the operation by applying the control to output a content screen when a command signal by a character key is detected at the teletext broadcast mode. CONSTITUTION:A system controller 7 outputs a control signal so as to output a content screen on the screen when an operation command signal from the TV broadcast into the teletext broadcast is detected and the state of the teletext broadcast selected already is confirmed by a mode discrimination means 7C and the information is sent to an operation control means 7B. Thus, the operation of character keys is an operation to obtain the program screen for the teletext broadcast at all times and at least the content screen is obtained by using the character key. Thus, when the program screen of the teletext broadcast is desired to be watched, the character key is to be operated for the time being in any case and the operation by the user is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a teletext receiver equipped with a single teletext decoder.

[Summary of the Invention] In the teletext receiver of the present invention, when a command signal is input by operating a remote commander or an operation button on the main body, ``Character key'', the system can operate a television (hereinafter referred to as When the system is in broadcast mode (referred to as TV), it switches to teletext mode and controls to display any teletext program.If the system is already in teletext mode, the teletext table of contents screen is displayed. The system control means is configured so as to be able to control the output.

[Prior Art] Teletext broadcasting in which information such as text and graphics is multiplexed and broadcast in empty areas of a TV signal has already been implemented. It can be received and viewed by a television receiver or a TV receiver equipped with a teletext receiver as a teletext decoder section.

When watching teletext, usually any teletext program is displayed by outputting a command signal that sets the system to teletext mode, and when you want to select a program, you can select a program such as news, weather forecast, subtitle broadcast, etc. All you have to do is display a table of contents screen that displays program contents in menu format, and then specify a program from there.

By the way, in order to improve the operability when watching teletext, there are various auxiliary screens and function expansion screens other than the table of contents screen.

For example, there are information screens as shown in Figures 3(a) to (d), program reservation screens as shown in Figure 3(e), etc. These screens (hereinafter collectively referred to as auxiliary screens) allow users to It can assist and explain teletext viewing operations, or achieve advanced operations.

Normally, such screen operations can be easily performed by key operations on the remote commander RC as shown in FIG. Various operation keys are provided, such as a key (table of contents key) 2 for calling up the table of contents screen from the teletext screen, a key (reservation key) 3 for calling up the reservation screen, and a key (guidance key) 4 for calling up the guide screen. and,
After an auxiliary screen such as a guide screen is called up, key operations may be performed according to the instructions on the screen.

[Problems to be solved by the invention] By providing various auxiliary screens in this way, operational assistance and high functionality can be achieved, but if the user wishes to return from the auxiliary screen to the teletext program screen. In some cases, malfunctions in which character keys 1 are operated are particularly common, which poses a problem in terms of operability.

In other words, in TV mode, operating character key 1 switches to teletext mode and displays the screen of any program, whereas the auxiliary screen operates on the teletext mode, so when the auxiliary screen is displayed, the text is not displayed. Key 1 is regarded as an invalid key by the system controller, and a table of contents key 2 and program selection key 5 are separately prepared in order to return to the program screen. However, general users are relatively accustomed to using the character key 1 to switch from TV mode and display the program screen, so regardless of the current mode, if you want to display the program screen, press the character key 1. 1, and the desired operation cannot be achieved in the end. For this reason, from the user's perspective, the control operations associated with conventional operation keys have never been appropriate.

[Means for Solving the Problems] The present invention has been made in view of the above problems, and provides an operation command signal (command signal using character keys) for switching the operation mode from TV broadcasting to teletext broadcasting. To provide a teletext receiver equipped with a system control means configured to output a table of contents screen of teletext when a teletext mode is detected.

[Function] By providing the above-mentioned control means, the operation of the character keys can always be performed to obtain the program screen of the teletext broadcast. In other words, you can at least get to the table of contents screen using the character keys.

[Embodiment] FIG. 1 is a block diagram of an embodiment of a teletext receiver of the present invention.

1 is a tuner and intermediate frequency amplification section, 2 is a video signal processing section, 3 is a mixing/switching circuit section, and 4 is a CRT display screen, which displays a normal TV video signal demodulated and amplified by the tuner and intermediate frequency amplification section 1. are finally converted into RGB signals in the video signal processing section 2 and output on the CRT display screen 4.

5 is a teletext decoder section, which includes a teletext extraction section 5A;
It includes a display control section 5B. The teletext extraction unit 5A extracts the teletext data superimposed on the video signal,
The extracted data is stored in the buffer memory 5Am after undergoing processing such as error correction. When a program is designated by a user's command operation, etc., the buffer memory 5Am is first searched, and the corresponding program data is read out and supplied to the display control unit 5B. Note that if the relevant data is not stored in the buffer memory 5Am, the data will be supplied to the display control section after waiting for new reception.

The display control unit 5B stores the input data in the display memory 5B.
At the same time, the data stored in the display memory 5Bm is read out in synchronization with the horizontal and vertical cycles of the television, converted into an RGB signal, and outputted to the mixing/switching section 3. The mixing/switching unit 3 performs mixing or selection processing on the supplied TV video signal and teletext signal, and in the teletext mode, displays only teletext video or overlays with TV video such as a subtitle screen. The combined video signal is output to the CR1 display screen 4.

6 is a light receiving section that receives an infrared command signal output from the remote commander RC.

Each of the above circuit units is connected to a system controller 7 by a microcomputer through a system bus SB, and is controlled by a command signal detection means 7A, an operation control means 7B, and a TV/telecasting mode determination means 7C, which are configured as control means. Movement is controlled.

Basic control operations include channel switching, mode switching, volume increase/decrease, teletext related operations, etc. In order to perform operations corresponding to various command signals detected by the command signal detection means 7A, the operation control means 7B Control signals are supplied to each circuit section.

The system controller 7 in the teletext receiver of this embodiment is further configured with the above-mentioned control means so as to be able to perform operations as shown in the flowchart of FIG.

First, when the command signal detected by the light receiving unit 6 is detected by the command signal detection means 7A (101), the command signal is a command by a character key, that is, a command for switching the operation mode from normal TV broadcasting to teletext broadcasting. (102). If the command is not a character key command, the character key is processed corresponding to the command signal, that is, as described above as a basic control operation, the operation control means 7B outputs a control signal for the corresponding operation to each circuit section. If it is a command, the mode determining means 7C checks whether the system is currently operating in TV mode or teletext mode (1041), and if it is in TV mode, the information is transmitted to the operation control means 7B. , a control signal for normal operation using the character keys, that is, for switching the system to the teletext mode and displaying an arbitrary program, is output (105).Meanwhile, in step 104, if the system is already in the teletext mode, a control signal is output. When it is confirmed by the mode discrimination means 7C that the content is displayed on the screen and the information is transmitted to the operation control means 7B, a control signal is outputted so that the table of contents screen is output on the screen (10
6) In other words, the same process as when operating the "table of contents key" is performed.

By performing the above operations in the system controller 7, if the user wants to view a teletext program screen, no matter what mode or screen it is currently in, the user only has to operate the character keys. , there is no need to worry about the operation, and a simple operation means is realized.

Note that some teletext receivers are not integrated with a television receiver as shown in Figure 1, but are of the adapter type with an independent teletext decoder; , the above operation may be performed in the control means in the decoder section.

[Effects of the Invention] As explained above, the teletext receiver of the present invention has the following effects:
In particular, the command signal for setting teletext mode (
When a character key command signal) is detected in the teletext mode, the system control means is configured to output the table of contents screen. Whenever you want to view the system, you just need to operate the character keys, which simplifies the user's operations and allows users to perform the desired operations even if they are not familiar with the system. effective.

ammunition, 7C indicates mode determining means.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the teletext receiver of the present invention, FIG. 2 is a flowchart showing an example of the control operation of the system controller in the embodiment of the present invention, and FIG.
a) to (e) are explanatory diagrams of various auxiliary screens, and FIG. 4 is a plan view showing an example of a remote commander.

Claims (1)

[Claims] A teletext receiver capable of receiving teletext video by being equipped with a teletext decoder, comprising means for detecting a command signal; means for outputting various control signals in response to the command signal. and; a means for determining whether the mode is operating in television broadcasting or teletext broadcasting is provided, and an operation command signal for switching the operating mode from television broadcasting to teletext broadcasting and displaying a teletext screen is provided. A teletext receiver characterized in that the system can be controlled so that a table of contents screen for teletext is output when detected in broadcast mode.