JPS63189065A - Teletext receiver - Google Patents

Abstract

PURPOSE:To display a designated program without any waiting time by applying picture processing and storing all pages of all programs of a channel in a screen signal memory. CONSTITUTION:A teletext signal is extracted from a television video signal inputted from an input terminal 1 by a data/clock generating circuit 4 and converted into a digital signal. Then a program data per 1Vd is stored in a packet buffer 7 via a BEST 6 and the data by one page is stored in a teletext signal memory 14. The program data stored in the teletext memory 14 is subjected to picture signal processing by a main CPU 9 and transferred to a screen memory 15 and stored. The processing above is repeated and the data of all pages are stored for all programs of teletext signals of one channel are being stored in the memory 15. The program data of the program selected by a remote controller 30 is extracted instantly from the memory 15 and displayed via a CRTC 19.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is a system for processing all programs and all pages of a teletext signal of a certain channel and storing them through image signal processing so that they can be immediately read out. This relates to broadcast receivers.

``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 retained for a certain period of time.

However, users have desired to be able to display a designated program immediately after selecting it.

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 screen memory that processes and stores the converted teletext signal data of all pages of all programs on one channel, and an image processing command for the teletext signal. It is equipped with a program ROM that issues an instruction to selectively read out image data from the screen memory, and a CPU that performs one-image processing control and selective readout control.

``Operation'' All programs and all pages of the teletext signal of one channel are processed and stored in the screen memory, so
When the desired teletext program number is selected using the remote control, the specified program is immediately displayed from among the stored programs.

"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 (1) for temporarily storing program data, as well as a path. Buffer (8)
The teletext signal memory (14) has a capacity for one page. (9) is a main CPU that performs image processing control and selective readout control;
A teletext program ROM (11) is connected via a pass line (10), a screen memory (15) stores all programs and pages of a certain channel after image signal processing, and C
G ROM (16), printer interface (1
7), melody processing CPU (18), CRT C (
19) and the system control unit CPU (, 20), respectively. The screen memory (15) stores all programs (for example, 1000 programs) of a certain channel, all pages (for example, 1
00 pages) can be stored as an image signal (for example, 1.00 pages).
5 GB).

An interrupt circuit (21) is also coupled to the upper CPU (9), a printer (22) as an external device is coupled to the printer interface (17), and the melody processing CPU (1g) is 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) has a V-RAM (26
) is coupled to the TV interface (
25) and RGB encoder (27) are combined, and this T
The V interface (25) and the RG B encoder (27) are coupled to the TV connection terminal (2g) (29).

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

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

A television video signal inputted from a television video signal input terminal (1) is subjected to a data clock generation circuit (4) in which a teletext signal is extracted and converted into a digital signal. Then, the program data per lVd is stored in the bucket buffer (7) via the B E S T (6), and one page worth of data is further stored in the teletext signal memory (14).

The program data stored in the teletext signal memory (14) is subjected to image signal processing by the main CPU (9) and transferred to and stored in the screen memory (15). The above operation is repeated to store all pages of data in the memory (15) for all programs of the teletext signal of one channel.

Now, when you select the desired teletext program number using the remote control (30), the light receiving section (31) and the system control section CP
Program selection number data is sent to the main CPU (9) via the IJ (20). Then, the program data of the selected program that has been processed for one screen is immediately taken out from the memory (15) and displayed via the CRT C (19). All pages of all programs of stored channels are displayed instantly.

"Effects of the Invention" As described above, the present invention processes all pages of all programs of one channel in the one-screen signal memory and stores them in an average of 20 to 30 seconds compared to the conventional method. There is no waiting time, and the specified program can be displayed immediately after 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 CPtJ, (10)...
...Pass line, (11) ...Program ROM, (
15)...Screen memory, (20)...System control CPU, (30)...Remote control, (31)...Light receiving unit.

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 all pages of all converted programs on one channel. a screen memory for image processing and storage of teletext signal data; a program ROM for commanding image processing of the teletext signal and selective reading of image data from the screen memory; A teletext receiver comprising a CPU that controls reading.