JPH01243789A - Teletext receiving device - Google Patents

Abstract

PURPOSE:To obtain newest character information at a moment when the power source of a character broadcast receiving device is turned on by storing the newest character information decoded by a character multiple decoder part, in a memory. CONSTITUTION:At a normal operating time as a television receiver having a character multiple decoder part 1, it is detected by a CPU circuit 3 that a character signal is outputted from a data sampling and error correcting circuit 4. Then, the signal is decoded according to a program loaded in a program ROM5 and supplied through a system bus 11 to a display control circuit 7. The display control circuit 7 obtains a picture signal corresponding to the supplied character signal, from a character generator 10 and executes the picture display of the character signal by supplying the picture signal to a picture display part 2. The character signal displayed at such a time is the character signal of character multiple broadcasting channel-selected in a tuner part 12. Thus, the newest information are displayed on the picture display part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to a teletext receiver of a type that includes a built-in teletext decoder section.

(2) Conventional technology Teletext broadcasting has already started, and anyone can easily receive teletext by using a type of television receiver with a built-in text multiplex decoder. It has become to.

Teletext broadcasting is transmitted by multiplexing a conventional video signal and a text signal. Therefore, in order to receive teletext broadcasting with a type of teletext receiving device that has a built-in conventional teletext decoder, it is necessary to It was used by operating the channel selector to select the desired channel and displaying it as an image.

There is no need to distinguish between the reception status of a teletext receiving device when receiving conventional video signals and text signals, so when turning off the power of the teletext receiving device, the circuit for receiving conventional video signals The character multiplex decoder section that receives character signals was also turned off at the same time.

(3) Problems to be Solved by the Invention Therefore, the next time the teletext receiving apparatus is turned on, there is an inconvenience in that the user must wait until the text signal of the desired channel is transmitted. Particularly for programs where information such as stock price information and news constantly changes, it is desirable to be able to obtain the latest information the moment the power is turned on.

(4) Means for Solving the Problems The present invention has been made in view of the above points, and its purpose is to make it possible to obtain the latest text information the moment a text broadcast receiving device is turned on. In order to achieve this purpose, we have developed a reservation table in which program numbers used for identifying the receiving channels and programs of teletext broadcasting are pre-registered, and a text multiplex decoder unit that receives and decodes character signals. , and a memory for storing character signals decoded by the character multiplex decoder section, and is configured to store the output of the character multiplex decoder section in the memory according to a reservation table.

(5) Effect In this configuration, since the latest character information decoded by the character multiplex decoder section is stored in the memory,
By displaying this, the latest text information is displayed the moment the teletext receiver is turned on.

(6) Examples Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a block diagram showing an embodiment of a teletext receiving apparatus according to the present invention.

In FIG. 1, the teletext receiving apparatus according to the present invention is configured as a television receiver having a teletext decoder section 1, and is roughly divided into a teletext decoder section 1 and an image display section 2. The character multiplex decoder section 1 is powered on at all times, and the image display section 2 is powered on only when displaying a screen, and otherwise turned off. That is, the power of the image display section 2 is turned on and off in the same way as the power of a television receiver.

The CPU circuit 3 shown in FIG.
In the operating state of R), it is detected that a character signal is output from the data extraction error correction port Pi4, and the program R is
The data is decoded according to the program loaded into the OM 5 and then supplied to the display control circuit 7 via the system bus 11. The display control circuit 7 displays an image of the character signal by extracting an image signal corresponding to the supplied character signal from the character generator IO and supplying it to the image display unit 2.

The text signal displayed at this time is a text signal of a teletext broadcast channel selected by the tuner part 12. Therefore, regarding the teletext broadcast channel selected by the tuner section 12, the latest information will be displayed on the image display section 2.

In a state where the power of the image display section 2 is turned off (second operating state), for example, in a state called a remote control standby state where the power of the television receiver is turned off with the remote control unit, the CPU circuit 3 It operates according to the programs shown in the flowcharts of FIGS. 3 and 4.

In preparation for the program operation shown in FIGS. 3 and 4 of the CPU circuit 3, a reservation table shown in FIG. 2 is stored in the nonvolatile memory 8 by a user's operation. The data is stored in the non-volatile memory 8 when the character multiplex decoder unit is unplugged by the user when changing the installation location of the television receiver, etc.
This is to store and maintain the reservation table shown in FIG. 2 even when the power is turned off.

The reservation table shown in Figure 2 is for the R channel of teletext broadcasting.
, a "program number" used to identify a program, and a "number" that identifies a combination of these channels and program numbers. A "memo" is not necessarily required.

The CPU PJ3 detects in step 21 that the power of the image display unit 2 is turned off (second operating state), and
A counter in the control data storage RAMB is incremented (step 22). Control data? The counter in the S product RAM 6 is a counter that determines the interval at which to move to the next reserved channel in the reservation table set as shown in FIG. Set.

If the set value of 6 minutes has not been reached, the process returns to step 21 (step 23). When I had reached
After resetting the counter in the control data storage RAMe in step 24, the next reserved channel is set (step 25).

Setting a reserved channel involves sending the contents of the reservation table shown in FIG. 2 to the channel selection control circuit 13 via the system bus 11.
This means switching to a stored channel. For example, according to the reservation table shown in FIG. 2, after receiving "News" on channel 01 for about 6 minutes, the user switches to channel 02 and then switches to the "English" channel.

Character signals received within this set time of 6 minutes are stored in the control data storage RAM 6 according to the program shown in the flowchart of FIG.

In FIG. 4, in step 26, it is detected whether the output signal of the data sampling error correction circuit 4 is a character signal. If it is a character signal, detect whether there is an error or not (
Step 27) Only when y=ri does not exist, it is detected whether the program is reserved in the reservation table of FIG. 2 (Step 28). If the program is reserved, the received character signal is stored in the control data storage RAM 6.

Based on the judgments in steps 26, 27, and 28,
If a result other than the above judgment is obtained, the program is immediately terminated and preparations are made to receive the next character signal.

The character signals stored in the control data storage RAM 6 in this way are displayed by the image display section 2 the next time the television receiver is turned on, that is, when it returns to the above-mentioned first operating state. Is displayed. This display is performed according to the program shown in the flowchart of FIG.

In FIG. 5, it is first determined whether the user has pressed the "#" button (step 31). This is because pressing the "#" button displays the reception results of teletext broadcasts up to that point. "#"
When the button is pressed, it is determined whether the program is reserved in the reservation table shown in FIG. 2 (step 32). When the program is reserved, the character signal stored in the control data storage RAM 6 is decoded and written to the display control circuit 7, and the latest character information is immediately displayed when the television receiver is turned on. Display is performed (step 33).

If the "#" button is not pressed, step 31)
If the program is not in the reservation table, the system waits for the next reception of the designated program (step 34), and displays the reception result (step 35).

In addition, even if the program is reserved in the reservation list,
After displaying the character signals stored in the control data storage RAM 6 in step 33, steps 34 and 35 are entered to display the latest character information.

(7) Effects of the Invention As explained above, the present invention provides a reservation table in which program numbers used for identifying the receiving channels and programs of teletext broadcasting are pre-registered, and A character multiplex decoder section for decoding and a memory for storing character signals decoded by the character multiplex decoder section are provided, and the output of the character multiplex decoder section is configured to be stored in the memory according to a reservation table. In this configuration, the latest character information decoded by the character multiplex decoder section is stored in the memory, so by displaying this, the latest character information can be displayed the moment the teletext receiver is turned on. It becomes possible to display.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the teletext receiving device according to the present invention, FIG. 2 is a reservation table explaining the operation of the circuit shown in FIG. 1, and FIG. FIG. 4 is a flowchart explaining the operation of the circuit shown in FIG. 1. FIG. 5 is a flowchart explaining the operation of the circuit shown in FIG. 1. ! ...Character multiplex decoder section 2... Image display section 3 - Qll CPU circuit 4 ... Data sampling error correction circuit 5 - See program ROM 6 ... Control data storage RAM 7... -Display control circuit 8...Non-volatile memory 9...Display memory lO...Character generator 11 -System bus 12...Tuner part 13...Tuition selection control Circuit patent applicant NEC Home Electronics Co., Ltd. Agent Patent attorney Yama 1) Takeki Bon 20/3 Figure 4

Claims (2)

[Claims] (1) A reservation table for pre-registering reception channels of teletext broadcasting and program numbers used to identify programs; a text multiplex decoder unit that receives and decodes text signals; and the text multiplex decoder. a memory for storing character signals decoded by the text multiplexing decoder section, and storing an output of the text multiplexing decoder section in the memory according to the reservation table. (2) Teletext broadcasting according to claim 1, which is incorporated into a television receiver and keeps the power on even when the television receiver is turned off. Receiving device.