JPS62136183A - Teletext receiver - Google Patents

Abstract

PURPOSE:To make reserving operations of teletext programs easier, by constituting a teletext receiver in such a way that reservations of plural teletext programs can collectively be performed against each channel and, at the same time, storing reserved contents in a nonvolatile multi-memory for multi-memory reserving table corresponding to each channel. CONSTITUTION:A main CPU 19 refers to multi-memory reserving tables and, when teletext program data pertinent to a program number registered in one of the tables corresponding to the channel currently being received exist stores the program data in a multi-memory. The multi-memory reserving tables are constituted on a nonvolatile multi-memory 37 and program numbers, page numbers, fetching information, etc., are registered in connection with each multi- memory l-n. Therefore, at the time of channel switching the reserving table corresponding to a newly selected channel is referred to and fetching to one or plural ones of the multi-memories corresponding to desired program data is automatically performed in accordance with the referred results.

Description

[Detailed Description of the Invention] Technical Field> The present invention relates to the technology of a teletext receiver, and more specifically, the present invention relates to the technology of a teletext receiver, and more specifically, the teletext signal is extracted from a multiplexed television signal on which the teletext signal is superimposed and stored in a data memory. The data stored in the data memory (code data) is read out, converted to output data (pattern data), and then CR
The present invention relates to a teletext receiver configured to be able to display the contents of the teletext signal on the screen of the CRT by feeding the teletext signal to T.

(Prior Art) Such a teletext receiver uses the vertical blanking period of a television video signal to receive encoded teletext transmitted in data packets whose unit length is the horizontal scanning period. It is configured to be able to receive a teletext signal and reproduce and display text and simple graphic information contained in the teletext signal on a CRT screen.

By the way, there are no conventional teletext receivers that are configured so that you can reserve the teletext program you want to receive and automatically import it into the data memory when the reserved teletext program arrives. However, the character count transmission/reception program reservation function of conventional teletext receivers is only effective for the teletext signal superimposed on the currently received television broadcast. Since the receiver only had memory for the teletext program reservation table corresponding to one channel, when switching to a new channel,
The reservation table of contents stored in the memory is cleared, and therefore, after changing the channel, the program reservation setting operation corresponding to the new channel must be performed again, which is extremely troublesome and time-consuming. It was an inconvenience.

<Object of the Invention> The object of the present invention is to provide a system with a convenient function that can eliminate the conventional disadvantage of having to re-book teletext programs every time the channel is changed, which is troublesome and time consuming. The aim is to provide teletext receivers.

<Structure of the Invention> In order to achieve the above object, the present invention takes the following measures.

That is, the teletext receiver according to the present invention has the basic configuration as described at the beginning, and is configured to be able to reserve a plurality of teletext programs for each channel at once, and to The content is stored in the non-volatile multi-memory for the multi-memory reservation table corresponding to each channel, and when the channel is switched to a new channel, the content is stored in the non-volatile multi-memory for the multi-memory reservation table. The system is characterized in that, based on the stored reservation details, the data of the teletext program corresponding to the channel being received is automatically loaded into the corresponding multi-memory.

<Example> Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 is a block diagram showing the circuit configuration of a teletext receiver according to an embodiment of the present invention, and as shown in the figure, R'F amplification of a television signal input from an antenna l,
A receiving section 2 of a normal television receiver that performs IF amplification and detection, and a video signal processing section 3 of a normal television receiver that extracts and processes a video signal from a composite video signal output from the receiving section 2. , the audio signal processing section 4 of a normal television receiver that similarly extracts and processes the audio signal from the composite video signal, the teletext signal processing section 5, which will be described in detail later, and the television obtained by the video signal processing section 3. a video switching circuit 6 for switching between a television video signal and a teletext signal obtained by the teletext signal processing unit 5; a CRT (cathode ray tube) 7; and a drive circuit 8 for driving the CRT 7.
and the audio signal obtained by the audio signal processing section 4 and the additional audio signal (melody) obtained from the teletext signal processing section 5.
The audio switching circuit 9 includes an audio switching circuit 9, an audio amplifying circuit 10, and a speaker 11.

The teletext signal processing unit 5 includes a waveform equalization data extracting circuit 12 into which the output of the receiving unit 2 is introduced, a clock pulse generation circuit 13, a synchronization signal generation circuit 14, and a framing detection identification circuit 15. Direct conversion/error correction circuit 16, capture buffer 17, display clock generation circuit 18, main CPU 19, and its main CPU
Program ROM20 for U1Q and main CP
A work RAM 21 for U1Q, a data memory 22 for storing required data of the extracted teletext signal, and a timing control circuit 23 for the data memory 22.
A sub CPU 24, a program ROM 25 for the sub CPU 24, and a work RAM also for the sub CPU 24.
26, a display controller 27, a display memory 2B, a matrix circuit 29, an audio decoder 30,
It is composed of a kanji ROM 31, an interface circuit 32, a remote control receiver/keyboard 33, and a printer 34. In addition, 35 . . . indicates a data bus, 36 .

A more detailed explanation of the operation of the teletext signal processing section 5 is as follows.

First, the television signal obtained from the receiving section 2 is
The signal is supplied to a waveform equalization data extraction circuit 12, which slices it into an appropriate level and shapes the waveform, and extracts the teletext signal.

The extracted teletext signal is converted from a serial signal to a parallel signal in a serial to parallel conversion/error correction circuit 16, and after errors are corrected, it is temporarily stored in a capture buffer 17. At this time, it is necessary to synchronize the teletext signal with the vertical to parallel conversion in the vertical to parallel conversion/error correction circuit 16, so the clock pulse generation circuit 13 and the framing detection and identification circuit 15 synchronize in bits and bytes. Be taken.

For the teletext signal stored in the capture buffer 17, the main CPU 19 determines whether there is a framing detection error, error correction error, etc., and whether there is a data identification code or reservation, and only the necessary data is transferred to the data memory 22. Stored. The multi-memory reservation table configured on the non-volatile memory is used to determine whether or not there is a reservation at this time, and the details of its operation will be described later.

On the other hand, the sub CPL 124 decodes the data (character code) taken in by the main CPU 19 and performs drawing processing and audio reproduction processing.

Regarding the drawing process, the sub CPU 24 calculates the address in the kanji ROM 31 from the character code stored in the data memory 22, sequentially transfers each character pattern and its display address to the display controller 27,
Accordingly, the display controller 27 sets the character pattern in the display memory 28. At this time, in order to synchronize with the television image, synchronization is achieved by the display clock generation circuit 18 and the synchronization signal generation circuit 14, and the signal is outputted to the video switching circuit 6 via the matrix circuit 29. As a result, the required character pattern is displayed on the CRT 7.

Note that when printing the display screen, a print command input by the operator from the keyboard of the remote control receiver/keyboard 33 is input to the sub CPU 24 via the interface circuit 32, and the sub CPU 24 stores the print command in the display memory 28. The set pattern data is sequentially output to the printer 34.

Regarding audio reproduction processing, audio data is output to the audio decoder 30, converted into audio (melody) by the audio decoder 30, and output to the audio switching circuit 9. This reproduced sound is output to the speaker 11 through the amplifier 10.

Incidentally, access switching between the main CPU 19 and the sub CPU 24 to the data memory 22 is performed by a timing switching circuit 23.

Next, regarding the operation of the nonvolatile multi-memory 37 for the multi-memory reservation table and its related components according to the gist of the present invention, the configuration diagram of the multi-memory reservation table shown in FIG. 2 and the data shown in FIG. A detailed explanation will be given with reference to a flowchart of the automatic import processing program.

As mentioned above, this teletext receiver has a data memory 2 for storing (memory) required data of the teletext signal extracted from the received multiplexed television signal.
2, this data memory 22 has sufficient capacity to store data related to a plurality of teletext programs. Assume that it is possible to store data for n programs, and the memories in which data for the n program bones are stored will be referred to as multi-memories [1] to (n).

The main CPU 9 refers to a multi-memory reservation table, which will be described later, and if there is teletext program data corresponding to the program number registered (reserved) in the reservation table corresponding to the current channel being received, the main CPU 9 transfers that program data to the Performs the task of loading the multi-memory (one of [1) to (n)] specified in the reservation table. Note that if multiple program numbers have been registered (reserved) in the same reservation table, all of the program data is stored in the multi-memory ([1]) corresponding to each one specified in the reservation table.
.

The multi-memory reservation table is configured on the nonvolatile multi-memory 37 as described above,
As shown in FIG. 2, each of the above-mentioned multi-memories [1] to (n
) about the program number.

Page numbers, import information (flags), etc. are registered. Therefore, when switching channels, as described above, the multi-memory reservation table corresponding to the newly selected channel is referred to, and based on that, the corresponding multi-memory ([l
] to one or more of (n)). In other words, the operator only has to register the number and page number of the teletext program he or she wants to reserve for each channel once in advance, and from then on, no matter how he or she switches channels or turns on the power, Even if the program is repeatedly turned off, the once-reserved teletext program is automatically captured and recorded in the required multi-memory in the data memory 22 without having to perform the program reservation operation again.

FIG. 3 shows a flowchart of an automatic data acquisition processing program (subroutine) for carrying out the above-mentioned automatic data acquisition processing operation.

The flowchart of this subroutine performs 5 TARTs when the television reception channel is switched.

Then, in steps ■ and ■, when it is determined that there is a teletext program reserved in the multi-memory reservation table corresponding to the channel currently being received and that the reserved program is actually being transmitted, step ■
and ■, the required teletext program data is imported into the designated multi-memory according to the contents of the multi-memory reservation table, and the import OK flag is set. If it is determined that the teletext program has not been reserved, or if it is determined that the teletext program has not been transmitted even if it has been reserved, data is retrieved and then RETARN is performed.

<Effects of the Invention> As is clear from the detailed description above, the teletext receiver according to the present invention is configured so that reservations for a plurality of teletext programs can be made for each channel at once. , the reserved contents are stored in a non-volatile multi-memory for a multi-memory reservation table corresponding to each channel, and when switched to a new channel, the reserved contents are stored in a non-volatile multi-memory for a multi-memory reservation table corresponding to each channel. Based on the reservation contents stored in the multi-memory, the data of the teletext program corresponding to the channel being received is automatically loaded into the corresponding multi-memory, so the operator can As long as you register the number and page number of the teletext program you want to reserve for channels only once in advance, from then on, no matter how you switch channels or repeatedly turn the power on and off, it will work just like before. The teletext program once reserved is automatically captured and recorded in the required multi-memory in the data memory, making the operation extremely simple, without having to repeatedly perform the troublesome and time-consuming program reservation operation. At the same time, it has achieved the excellent effect of allowing users to fully enjoy the necessary teletext services without missing out on them.

[Brief explanation of drawings]

The drawing shows an embodiment of a teletext receiver according to the present invention,
Figure 1 is a block circuit diagram showing the overall schematic circuit configuration;
3 is a configuration diagram of a multi-memory reservation table, and FIG. 3 is a flowchart of an automatic data import processing program. 7...CRT. 11...Speaker, 19...Main CPU. 22...Data memory, 24...Sub CPU. 37...Nonvolatile multi-memory for multi-memory reservation table.

Claims (1)

[Scope of Claims] A teletext signal is extracted from a multiplexed television signal on which the teletext signal is superimposed, sequentially stored in a data memory, and the data stored in the data memory is read out and converted to output data and transmitted to a CRT. A teletext receiver configured to be able to display the contents of the teletext signal on the screen of the CRT is configured to be able to reserve a plurality of teletext programs for each channel at once. and configure the reserved contents to be stored in a non-volatile multi-memory for a multi-memory reservation table corresponding to each channel,
Furthermore, when switching to a new channel, data of the teletext program corresponding to the channel being received is stored in the corresponding multi-memory based on the reservation contents stored in the non-volatile multi-memory for the multi-memory reservation table. A teletext receiver characterized in that the teletext receiver is configured to automatically receive the broadcast.