JP2555581B2 - Teletext receiver - Google Patents

Description

TECHNICAL FIELD The present invention relates to a teletext receiver in which programs and pages of teletext signals are constantly updated and stored with the latest data.

[Prior Art] Generally, the transmission interval of one page in teletext is set to 20 to 30 seconds or less in operation system items in consideration of a reading time and the like. Therefore, even if a program or page is selected, it will wait for a certain period of time.

In addition, for a weather forecast or stock price, a new teletext signal is sent after a certain time. However, when the teletext signal is stored in the memory and is displayed immediately, it is desired to update it with the latest data.

"Means for Solving Problems" The present invention has been made to solve the above problems, and a teletext circuit for extracting and processing a teletext signal from an input TV video signal, A circuit for converting a teletext signal into a digital signal, a buffer memory for temporarily storing the converted signal, a memory for storing a program, and a buffer memory in place of the data already stored in the program storage memory. A command ROM for storing the latest data temporarily stored in, a text broadcast image processing command, and a program ROM for issuing a selective program data read command from the memory, and storage control of the latest data, image processing control, selection An image processing microprocessor for performing a selective read control, the program data temporarily stored in the buffer memory and the program storage memory If it is the same program, the program data temporarily stored in the buffer memory is updated and stored in the program memory regardless of whether the program contents are the same or not. It is a teletext receiver characterized by having done.

"Operation" When the program number of the target teletext is selected with the remote control, if the same page of the same program is already stored in the program storage memory, whether the stored content is the same as the latest content. Regardless of, the contents of the program storage memory are updated and stored. Therefore, the latest program data is always stored in the program storage memory. When watching a teletext, if it is a stored program, the designated program is immediately displayed.

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

(1) is a television video signal input terminal, to which a sync signal generation circuit (3) and a data clock generation circuit (4) are coupled via a waveform equalization circuit (2). An error correction circuit (6) is coupled to the data clock generation circuit (4) via an interface (5), and further coupled to a packet buffer (7) for temporarily storing program data and a bus. It is connected to the buffer (8) and the buffer memory (14).
(9) is a main CPU, and this main CPU (9) has a bus line (1
0) via a teletext program ROM (11), a program storage memory (15) having a capacity to store program data of a plurality of pages of a plurality of teletext programs, a CGROM (16), a printer interface (17), Melody processing CPU (18), CRT
C (19) and system control CPU (20). An interrupt circuit (21) is also connected to the main CPU (9), and a printer (22) of an external device is connected to the printer interface (17) for the melody processing.
The CPU (18) has a buffer data RAM (23) and a tone generator circuit (2
4) is coupled, and this sound source circuit (24) is coupled to the TV interface (25). The CRTC (19) has V-
RAM (26) is combined with the TV interface (25) and RGB encoder (27),
The interface (25) and the RGB encoder (27) are coupled to the TV connection terminals (28) (29).

The system control CPU (20) is coupled with a light receiving section (31) of a remote controller (30), and is also connected with a system reset output terminal (32) and a power on / off terminal (33).

The operation of the circuit configuration as described above will be described. When a program with a certain channel is designated by the remote controller (30), the program data is temporarily stored in the buffer memory (14). When the program data of the same program is already stored in the program storage memory (15), the latest program data is replaced with the old program data and updated and stored regardless of whether the contents are the same or not. To further explain the operation up to this storage, the television clock signal input from the television video signal input terminal (1) is subjected to extraction of a teletext signal by the data clock generation circuit (4) and is converted into a digital signal. It Then, the program data per 1 Vd is stored in the packet buffer (7) via the BEST (6), and further 1
Program data for the screen is stored in the buffer memory (14). Whether the program data in the buffer memory (14) is the same program as the program data already stored in the program storage memory (15) is compared. If they are the same program, the program data is updated and stored with the latest program data in the program storage memory (15) regardless of whether the program data has the same content.

Now, when the desired teletext program number is selected using the remote control (30), the light receiving section (31) and system control CPU (2
Program selection number data is sent to the main CPU (9) via 0). Then, if the selected program is already stored, the program data is taken out from the program storage memory (15) and the designated program is immediately displayed. The program storage memory (15) for storing program data stores not only the case where one program has a plurality of pages or each program has one page but also the pages of a plurality of programs. It may be.

As described above, the present invention compares whether the program data temporarily stored in the buffer memory and the program data in the program storage memory are the same program, and if they are the same program, the content of the program is Regardless of whether they are the same or not, since the program data temporarily stored in the buffer memory is updated and stored in the program storage memory, the latest program data of the designated program can be displayed immediately after the selection.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a teletext receiving apparatus according to the present invention. (1) ... TV video signal input terminal, (7) ... packet buffer, (9) ... main CPU, (10) ... bus line, (11) ... program ROM, (14) ... buffer memory , (15) …… Program storage memory, (20) …… System control CPU, (30) …… Remote control, (31) …… Light receiver.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoji Ikuta 1116 Suenaga, Takatsu-ku, Kawasaki City, Fujishidori General Co., Ltd. (72) Kota Hashiguchi 1116 Suenaga, Takatsu-ku, Kawasaki, Japan (56) References Japanese Unexamined Patent Publication No. 57-148485 (JP, A) Actual No. 56-107198 (JP, U)

Claims (1)

(57) [Claims] 1. A teletext circuit for extracting and processing a teletext signal from an input television video signal, a circuit for converting the teletext signal into a digital signal, and a buffer memory for temporarily storing the converted signal. A memory for storing the program, an instruction for storing the latest data temporarily stored in the buffer memory in place of the data already stored in the program storage memory, a teletext image processing instruction, A program temporarily stored in the buffer memory, which is provided with a program ROM for issuing a command to selectively read program data, and an image processing microprocessor for controlling storage of the latest data, image processing control, and selective read control. The data and the program data in the program storage memory are compared to see if they are the same program. Teletext receiver, characterized in that regardless was adapted to store and update the program data stored temporarily in the buffer memory in the program storage memory.