JPS636941Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on the invention that when the television reception channel symbol stored in the number storage memory matches the television reception channel symbol detected by the detection unit, the television reception channel symbol stored in the number storage memory is stored in the number storage memory. The present invention relates to a teletext receiver that stores program data of program numbers in an information display memory and allows a user to reserve a program that matches his/her intention.

Generally, when receiving a TV text multiplex signal sent out by a teletext broadcasting device, it is necessary to have a memory for storing information in order to extract and store the text and graphic information signals of the program selected by the user. Recent advances in semiconductor technology have made it possible to obtain large-capacity random access memories at low cost, and teletext receivers equipped with memory for storing multiple pages of information have been implemented. It is configured as shown in the figure.

In Figure 1, when the user wants to reserve a desired program, when the user presses the number corresponding to the desired program number on the reservation keyboard KB shown in the figure, the program number output from the reservation keyboard KB is Memory MN for number storage via processing unit CPU
and the program is reserved.

Next, the received character multiplexed signal of each program is input to the buffer memory MB via the input terminal IN and stored therein, and is then processed by the central processing unit CPU.
It is determined whether the program number of the character multiplexed signal stored in buffer memory MB matches the program number reserved in number storage memory MN, and if they match, the central processing unit CPU executes Among the character multiplex signals stored in the buffer memory MB, the character multiplex signal of the reserved program number is decoded into characters, graphic patterns, and color information.
The program data is stored in the first to third refresh memories MA1 to MA3, which are rewritable information display memories.

Then, by operating the reservation reading keyboard KR, the program number reserved in the number storage memory MN is read out and a display command is issued. ~3rd refresh memory MA1~
When one of MA3 is selected, the program data is displayed on the display screen CRT as a character and graphic pattern with color information added via the switching circuit SC.
That is, it is displayed on the tube surface of the cathode ray tube.

However, according to the teletext receiver shown in Fig. 1, among the multiple teletext programs transmitted,
You can make a reservation for the desired program, but since only the program number is stored in the number storage memory MN, the following problems occur when multiple broadcasting stations offer teletext services at the same time. cause inconvenience.

Now, for example, if three broadcasting stations A, B, and C are providing teletext services at the same time, the user wants to select the program with program number "15" of station A, so he operates the reservation keyboard KB. When the program number "15" is stored in the number storage memory MN and a reservation is made, the TV channel selection device of the teletext receiver is set to "a", which is the TV reception channel symbol corresponding to station A, for example. If so, the character multiplexed signals of each program sent from station A are stored in the buffer memory MB.
is stored in the central processing unit CPU.
As a result, the character multiplex signal with program number “15” is transferred from the buffer memory MB to the predetermined refresh memory.
The desired program data is stored in MA1 to MA3 as program data, and desired program data from the refresh memories MA1 to MA3 can be displayed on the display screen CRT at any time by operating the reservation reading keyboard KR.

On the other hand, if the user wants to select the program with the program number "15" of station A, he operates the reservation keyboard KB to store the program number "15" in the number storage memory MN and makes a reservation. For example, if the channel selection device of the teletext receiver is set to "b", which is the television reception channel symbol corresponding to station B, the program number "15" among the teletext signals of each program sent from station B ” is stored in the predetermined refresh memories MA1 to MA3, and program data different from the program data desired by the user is stored. In addition, the A that the user desires
After the program data of the station's program number "15" is stored in the refresh memories MA1 to MA3, the user turns the tuning device of the teletext receiver to "b", which is the TV reception channel symbol corresponding to station B. When changed, the program data of program number "15" of station B is newly stored in refresh memories MA1 to MA3,
The program data of program number “15” of station A that was already stored is stored in refresh memories MA1 to MA3.
This is extremely inconvenient as the data will be deleted from the user's computer, which is contrary to the user's intention.

This invention has been made with the above-mentioned points in mind, and next, this invention will be explained in detail with reference to FIG. 2 showing one embodiment thereof.

In the figure, the same symbols as in Figure 1 indicate the same or corresponding things, and the difference from Figure 1 is that when reserving a specific program of a specific broadcast station, the TV reception channel corresponding to the specific broadcast station A reservation keyboard KBc capable of inputting symbols and program numbers is provided, and a number storage memory MNc stores television reception channel symbols and program numbers outputted by the reservation keyboard KBc via the central processing unit CPU. In addition to establishing
A detection unit RC is provided for detecting which TV reception channel symbol corresponding to which broadcasting station the tuning device is set to based on a tuning signal outputted from the tuning device (not shown) via an input terminal T. , the TV reception channel symbol and detection unit stored in the number storage memory MNc by the central processing unit CPU.
The television reception channel symbol detected by the RC is discriminated, and when the two television reception channel symbols match, the character multiplex signal of the television reception channel symbol and program number stored in the number storage memory MNc is processed by the central processing unit. The point is that the program data is read out from the buffer memory MB by the processing device CPU and stored in predetermined refresh memories MA1 to MA3 as program data.

Therefore, for example, if three broadcast stations A, B, and C are providing teletext service at the same time,
The user wants to select the program number "15" of station A, so he operates the reservation keyboard KBc, and stores, for example, the TV reception channel symbol "a" corresponding to station A and the program number "15" in the number storage memory.
If you store it in MNc and make a reservation, the channel selection device will
When set to "a", which is the television reception channel symbol corresponding to the station, the central processing unit CPU selects the program number of station A among the character multiplex signals of each program stored in the buffer memory MB. 15" character multiplex signal is read out and stored as program data such as characters and graphics in predetermined refresh memories MA1 to MA3, and can be displayed on the display screen CRT at any time by operating the reservation reading keyboard KR. can.

On the other hand, if the channel selection device is set to "b", which is the TV reception channel symbol corresponding to station B,
Since the central processing unit CPU does not read the character multiplexed signal from the buffer memory MB, program data different from the program data desired by the user will not be stored in the refresh memories MA1 to MA3. Furthermore, the program data desired by the user that is already stored in the refresh memories MA1 to MA3 is not erased as in the conventional case, and the reservation can be made in accordance with the user's intention.

As described above, in the teletext receiver of the present invention, the television reception channel symbol stored in the number storage memory matches the television reception channel symbol detected by the detection section, and When the program number stored in the program matches the program number of the received text multiplex signal, the program data of the received text multiplex signal is stored in the information display memory, so that the program desired by the user can be displayed. and the program number is the same, but another program on a different broadcast channel is displayed incorrectly, or the program data of the desired program already stored in the display memory is deleted when the channel is switched. This inconvenience can be resolved, and therefore teletext programs can be accurately reserved and displayed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional teletext receiver, and FIG. 2 is a block diagram of an embodiment of the teletext receiver of this invention. MA1 to MA3...first to third refresh memories, CRT...display screen, MNc...number storage memory, RC...detection unit.

Claims (1)

[Scope of utility model registration request] It is equipped with a plurality of information display memories that receive text multiplex signals of multiple programs transmitted by television teletext broadcasting, and store program data such as characters and graphics of reserved text programs, and selectively display the information. A reservation specification that specifies the program number of the text program to be received and displayed and the channel code of the television reception channel on which the text program is being transmitted, in a text broadcast receiver that displays program data stored in the display memory on the display screen. a program storage memory that stores the specified program number and channel code; and a detection unit that receives a channel selection signal from the channel selection device and detects the channel symbol of the selected television reception channel. provided, the channel symbol stored in the program storage memory and the channel symbol detected by the detection unit match;
and a character that causes program data of the received text multiplex signal to be stored in the information display memory when the program number stored in the program number storage memory matches the program number of the received text multiplex signal. Broadcast receiver.