JPH01143597A - Teletext broadcast receiver - Google Patents

Abstract

PURPOSE:To switch the operating mode and a reception channel or the like without being limited to the viewing position by connecting a wired remote control unit to a printer output terminal and inputting at operation input signal via the printer output terminal. CONSTITUTION:A cable 15a of a wired remote control unit 15 is connected to the printer output terminal 14. The operation input signal from the unit 15 is given to a CPU 3 via an output terminal 14 and an interface circuit IF 16. When a key on the unit 15 is depressed, a control section 15d gives a significant strobe signal and a data corresponding to the key to the IF 10 via the output terminal 14. When the CPU 3 detects the strobe signal, it fetches a data from the IF 16 and applies the processing of the content indicated by the data such as channel switching or changeover of teletext broadcast and TV broadcast.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a teletext receiver, and particularly to a teletext receiver that is capable of reliably receiving operation input signals.

[Prior Art] In a conventional teletext receiving device, when a viewer wants to switch the desired operation mode or desired channel, he or she must use a key on the operation panel provided on the front of the device body or a wireless modem. This was done by operating keys on the control unit.

[Problems to be Solved by the Invention] By the way, it is inconvenient for the viewer to go to the operation panel of the main body of the device to operate it, and the viewer mainly operates the keys on the remote control unit. The desired switching is often performed by but,
The receiving section that receives wireless signals (for example, infrared signals) from the remote control unit is provided on a part of the front panel of the main body of the device, and the receivable directional range is not necessarily wide, so it may be difficult for the viewer to The remote control unit must be directed toward the main body of the device.

Therefore, it may be possible to apply a wired remote control unit, but this would require significant changes to the existing configuration of the teletext receiver, and it would also be necessary to use a wired remote control unit that already has a wireless remote control unit. It cannot be easily made compatible with commercially available teletext receivers.

The present invention has been made in consideration of the above points, and allows the viewer to reliably instruct switching of the operating mode, reception channel, etc. without being restricted by the viewing position by making slight changes to the configuration. The present invention aims to provide a teletext receiving device.

[Means for Solving the Problems] In order to solve the problems, the present invention provides a teletext receiving device having a printer output terminal that can be connected to an external printer device, in which the cable of the wired remote control unit is The tip terminal is selected to have a shape that engages with the printer output terminal, and is engaged with the printer output terminal.
The operation input signal from the remote control unit is applied to the control means for switching and controlling the operation mode via the printer output terminal.

[Function] The tip terminal of the wired remote control unit is engaged with the printer output terminal, and the operation input signal from the remote control unit is given to the control means inside the main body of the device via the printer output terminal to respond to the content. The operation mode can now be changed.

As a result, it has become possible to take in operation input signals from a wired remote control unit by using existing printer output terminals and making slight changes.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a video signal VID is applied to a data sampling error correction circuit 1. In FIG. A data sampling error correction circuit 1 converts code data superimposed in a predetermined horizontal scanning period of a vertical blanking period of an incoming video signal VID to a microprocessor (CP) via a system bus 2.
U) Under the control of 3, the code data is taken out, error-corrected using a built-in buffer memory, etc., and the code data is output to the system bus 2.

In addition to the CPU 3, the system bus 2 includes a program memory 4 consisting of ROM, a working memory 5 consisting of RAM 1,
A character generator 6 is connected. CPU3
In accordance with the program stored in the program memory 4, when the teletext display mode is instructed, the code data given from the data sampling error correction circuit 1 is temporarily stored in the working memory 5, and then the character generator 6 is activated. The pattern data is converted into display pattern data and stored in the display memory 8 via the display control circuit 7.

A display timing generation circuit 9 is connected to the display control circuit 7. The display timing generation circuit 9 receives the video signal V
Vertical and horizontal synchronization signals separated from the ID and a display clock signal obtained by frequency-multiplying these synchronization signals are provided to the display control circuit 7. The display control circuit 7 is configured to read out the pattern data stored in the display memory 8 in a rask pattern in synchronization based on these synchronization signals and display clock signals, and provide the pattern data to a CRT display device (not shown).

Note that the display control circuit 7 is configured to be supplied with the video signal VID, and when the display mode is not for teletext, that is, when the display mode is for television broadcast, the incoming video signal VID is directly transmitted to the CRT display device. It is designed to be given to

In addition to the above configuration, as is well known, an operation input configuration for specifying switching of various operation modes, reception channels, etc. is provided. The front operation panel of the main body of the device is provided with a key-powered device 10 equipped with channel keys, keys for switching between text broadcasting and television broadcasting, etc., and an operation input signal from this key-powered device 10 is transmitted to an interface circuit 11. and is provided to the CPU 3 via the system bus 2. In addition to this key-powered device 10, a separate remote control unit 12 for wireless transmission is provided which is equipped with a channel key, a key for switching between text broadcasting and television broadcasting, etc. The remote control signal is sent to the remote control signal receiving section 13.
receives the data, converts it, and sends it to the CP via system bus 2.
It is designed to be given to U3.

In addition to the general operation input configuration described above, this embodiment provides a further separate operation input configuration. The teletext receiving device is provided with a printer output terminal 14 that can be connected to an external printer so that the displayed contents of the teletext can be printed out as needed. The output terminal 14 is used. That is, the tip terminal 15b of the cable 15a extending from the wired remote control unit 15 is selected to have a terminal arrangement shape that engages with the printer output terminal 14, and when engaged with the printer output terminal 14, The remote control signal from the remote control unit 15 is sent to the printer output terminal 14, the interface circuit 16, and the system bus 2.
It is designed to be given to PU3.

Note that when connecting a printer device to the printer output terminal 14, various data are output from the device body to the printer device, so the system bus 2 and □ printer output terminal 1
The interface circuit 16 interposed between the terminals 4 and 4 may be of any type as long as it can mainly realize an output interface function, but in the case of this embodiment, since it takes in various data from the remote control unit 15, the interface circuit 16 is an input/output circuit. Apply one that performs any of the interface functions.

For example, as shown in FIG. 2(A), the bus for the printer device includes one strobe signal line STB and one strobe signal line STB.
For example, there are 14 lines including one busy signal line BUSYt, eight data lines DAT, one ground line GND, etc., but for data transfer from remote control signal line 15, As shown in FIG. 2(B), a strobe signal line, a busy signal line, a data line, and a ground line are used.

The newly provided remote control unit 15 includes a key switch section 15C such as a channel key and a key for switching between text broadcasting and television broadcasting, and a control section 15d that controls the transfer of data corresponding to the pressed key. ing.

In the above configuration, the CPU 3 connects the interface circuit 11 and the remote control signal receiving section 13 at predetermined intervals.
and the interface circuit 16 in order. At this time, if a key on the remote control unit 15 is pressed, a significant strobe signal and data corresponding to the key are given to the interface circuit 16 via the printer output terminal 14 by the control unit 15d and latched. There is.

When the CPU 3 detects this strobe signal by scanning, it starts the program shown in FIG. 3 in step SPI, takes in data from the interface circuit 16 in step SP2, makes the busy signal significant in step SP3, and makes the busy signal significant in step SP4. Processing specified by the data, such as channel switching and switching between teletext and television broadcasting, is executed, and then the busy signal is ignored in step SP5, and the program is ended in step SP6.

Therefore, according to the embodiment described above, the printer output terminal 14
Various operating modes can be inputted and operated by a wired remote control unit 15 to which a cable end terminal 15b is engaged, and the viewer can input operations without having to move one step at a time and without considering the orientation of the remote control unit. Can be done. In this case, since a printer output terminal is used, a slight change in the configuration from the conventional configuration is required.

In addition, although in the above-mentioned embodiment, one is shown that is also equipped with a wireless remote control unit 12, the present invention can also be applied to a teletext receiving apparatus that does not include this wireless remote control unit. can.

[Effects of the Invention] As described above, according to the present invention, a wired remote control unit is connected to a printer output terminal, and an operation input signal is applied to the main body of the apparatus via the printer output terminal to switch the operation mode. Since the remote control unit is controlled, it is possible to obtain a teletext receiving apparatus with a simple configuration in which the viewer can perform input operations without changing his position or considering the orientation of the remote control unit.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the teletext receiving apparatus according to the present invention, FIG. 2 is a route map for explaining the path lines, and FIG. 3 is a flowchart showing the input operation processing procedure. DESCRIPTION OF SYMBOLS 1... Data sampling error correction circuit, 2... System bus, 3... CPU, 4... Program memory, 5
... Working memory, 6... Character generator, 7... Display control circuit, 8... Display memory, 1
0...Display timing generation circuit, 14...Printer output terminal, 15...Wired remote control unit, 16...Interface circuit.

Claims (1)

[Claims] In a teletext receiving device having a printer output terminal that can be connected to an external printer device, the cable end terminal of the wired remote control unit is selected to have a shape that engages with the printer output terminal. What is claimed is: 1. A teletext receiving device, characterized in that the teletext receiving device is engaged with a printer output terminal so that an operation input signal from the remote control unit is applied to a control means for switching and controlling operation modes via the printer output terminal.