JPS63189072A - Teletext receiver - Google Patents

Abstract

PURPOSE:To display the updated data of a designated program immediately after selection by storing a teletext signal extracted from an input signal, and converted into a digital signal tentatively in a buffer memory so as to revise the content of the memory storing the program. CONSTITUTION:A signal inputted from a television video input terminal 1 is subject to extraction of a teletext signal by a data clock generating circuit 4 and stored in a packet buffer 7. When a program of a channel is designated by a remote controller 30, a program data by one pattern is stored in a buffer memory 14. The data is compared with the data stored in the memory 15 and when the data comes from the same program, the data is revised by the newest program data in the memory 15 and the result is stored. Then in selecting a program number of an object teletext by the remote controller 30, the designated data is sent to a system control CPU 9, and it is extracted from the memory 15 and displayed instantly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a teletext receiver that constantly updates and stores programs and pages of teletext signals with the latest data.

4. Prior Art In general, in teletext broadcasting, the sending interval of one page is set at 20 to 30 seconds or less in consideration of reading time and other factors. Therefore, even if a program or page is selected, it will be displayed for a certain period of time.

Also, new teletext signals are sent after a certain period of time for weather forecasts, stock prices, etc. Therefore, if this teletext signal is to be stored in a memory and displayed immediately, it is desirable to update it with the latest data.

The present invention has been made to solve the above-mentioned problems, and includes a circuit for extracting and processing a teletext signal from an input television video signal; A circuit that converts a teletext signal into a digital signal, a buffer memory that temporarily stores the converted signal, a memory that stores one program, and a circuit that temporarily stores data in the buffer memory in place of the data already stored in this memory. A program ROM that instructs to store the latest stored data, an image processing command for teletext broadcasting, a command to selectively read program data from the memory, and a program ROM that instructs the storage of the latest data, image processing control, and selective It is equipped with an image processing microprocessor that performs readout control.

``Operation'' When you select the program number of the desired teletext broadcast using the remote control, if the same page of the same program is already stored in the memory, regardless of whether the content already stored is the same as the latest content or not. The memory contents are updated and stored without any changes. Therefore, the latest program data is always stored in the memory. When watching teletext, the designated program is displayed immediately if it is a stored program.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

(1) is a TV video signal input terminal, and a synchronization signal generation circuit (3) and a data clock generation circuit (4) are connected to this video signal input terminal (1) via a waveform equalization circuit (2). This data/clock generation circuit (4) is coupled to an error correction circuit (6) via an interface (5), and is further coupled to a bucket buffer (7) for temporarily storing program data, as well as a path. Buffer (8)
, coupled to a buffer memory (14). (9) is the main CPU, and this main CPU (9) has a pass line (lO
), a teletext corner program ROM (11), a memory with a capacity to store multiple pages of program data for multiple teletext programs (15), and a CG ROM (16).
, printer interface (17).

It is connected to a melody processing CPU (1g), a CRTC (19), and a system control CPU (20), respectively.

The upper CPU (9) is also connected to an interrupt circuit (21), the printer interface (17) is connected to an external device printer (22), and the melody processing CPU (18) is connected to an interrupt circuit (21). Buffer data RAM
(23) and a sound source circuit (24) are coupled, and this sound source circuit (24) is coupled to a TV interface (25). The CRTC(19)4: is V-RAM (
26) is coupled, and the TV interface (25) and RGB encoder (27) are coupled, and this TV interface (25) and RGB encoder: I-
The terminal (27) is coupled to the TV connection terminals (28) (29).

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

The operation of the circuit configuration as described above will be explained.

When a certain program on a certain channel is designated by the remote control (30), the program data is temporarily stored in the buffer memory (14). If program data of the same program is already stored in the 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 TV video signal input from the TV video signal input terminal (1) is processed by the data/clock generation circuit (4).
The teletext signal is extracted and converted into a digital signal. Then, the program data per IVd is stored in the bucket buffer (7) via B E S T (6), and the program data for one screen is stored in the buffer memory (14).
). It is compared whether the program data in this buffer memory (14) is the same program as the program data already stored in the memory (15). If it is the same program, it is updated and stored with the latest program data in the memory (15) regardless of whether the contents of the program day and evening are the same or not.

Now, when you select the desired teletext program number using the remote control (30), the light receiving section (31) and system control CP
Program selection number data is sent to CPU U (9) via CPU U (20). Then, if the selected program is already stored, the program data is taken out from the memory (15) and the designated program is immediately displayed. Note that the memory (15) for storing program data is not only used when one program has multiple pages or multiple programs each have one page, but also stores multiple pages of multiple programs. There may be.

"Effects of the Invention" As described above, the present invention updates and stores the data in the memory with the latest data, so that the latest program data of a designated program can be displayed immediately upon selection.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of a teletext receiving apparatus according to the present invention. (1)...TV video signal input terminal, (7)...Bucket buffer, (9)...Main CPU, (10)...
・Pass line, (11)...Program ROM, (1
4)...Buffer memory, (15)...Memory, (
20)...System control CPU, (30)...Remote controller, (31)...Light receiving unit. Applicant Fujitsu General Co., Ltd.-'1°-1;

Claims (1)

[Claims] (1) A teletext circuit that extracts and processes a teletext signal from an input television video signal, a circuit that converts the teletext signal into a digital signal, and a buffer memory that temporarily stores the converted signal; A memory for storing programs, a command for storing the latest data temporarily stored in a buffer memory in place of data already stored in this memory, an image processing command for teletext broadcasting, and selective programs from said memory. Program R that commands data readout
A teletext receiver comprising an OM and an image processing microprocessor that performs storage control, image processing control, and selective readout control of the latest data.