JPS63189077A - Teletext receiver - Google Patents

Abstract

PURPOSE:To display a program data without having waiting time in the order of designation by extracting a signal from a television video signal, converting it into a digital signal as the program data of plural pages of the teletext signal and displaying them sequentially in response to the command. CONSTITUTION:A signal inputted from a television video input terminal 1 is subjected to the extraction of a teletext signal by a data clock generating circuit 4, converted into the digital signal and the program data per 1Vd is stored in a packet buffer 7, and stored sequentially in the program data storage memory 15 together with a page number before the next Vd period. In selecting the program number of an object teletext by using a remote controller 30, the program data selected by a main CPU 9 is extracted from the memory 15 and the designated program is displayed. In depressing the forward/reverse designation button, the next page number is read in the designated order and the teletext data is displayed sequentially.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a teletext receiver that reads and displays teletext signals stored in a memory in the forward or reverse direction according to page numbers. It is related to.

``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 you select a program or page, it will open at a certain time.

Therefore, it is conceivable to read and display the teletext signal stored in the memory, but in this case, it has been desired to be able to read and display the teletext signal in the forward or reverse direction depending on the page number.

The present invention has been made in order to solve the above-mentioned problems, and includes an extraction circuit for extracting and processing a teletext signal from an input television video signal, and a method for extracting and processing a teletext signal from an input television video signal. a program data storage memory for storing program data of a plurality of pages of the converted specific program; It is equipped with a program ROM that instructs to read program data in the forward or reverse direction, and a CPU that performs image processing control and control in the read direction.

"Operation" When you press the page number forward button or reverse button,
The data is read out and displayed in the order of the page numbers stored in the memory so far.

"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)
6 (9) connected to is the main CPU, and this main CPU
U (9) is connected via a pass line (10) to a teletext program ROM (11), a memory for storing teletext signals of multiple programs (15), a CGROM (16), a printer interface (17), and a melody processing CPU for
(18), CRTC (19), system control CPU
(20) Each person is connected.

An interrupt circuit (21) is also connected to the upper CF U (9), an external device printer (22) is connected to the printer interface (17), and the melody processing CPU (1g) 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) has V-RAM (2
6) are combined, and the TV interface (25) and the RGB encoder (27) are combined, and the TV interface (25) and the RGB encoder (27) are combined.
7) are coupled to TV connection terminals (28) (29).

The system control CPU (20) includes a remote control (
A light receiving section (31) of 3°0) is coupled thereto, and a system reset output terminal (32) and a power on/off terminal (33) are 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. and through BEST(6), bucket buffer(7)
Program data per IVd is stored in memory. Before the next Vd period, the program data stored in the bucket buffer (7) is sequentially stored in the memory (
15) and stored.

The above operations are carried out in Vd cycles to store program data for one character broadcast in the memory (15). At this time, the page number is simultaneously stored in the page number table in the memory (15). For this page number data, the CPU (9) takes in the total page number data from the 1 page number data to create a table.

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 the main c p U (9) via U (20). Then, the main CPU (9)
The program data of the program selected by is stored in the memory (15).
6. If you press the forward button while the program is displayed, the flowchart in Figure 2 will show the specified program.
When the reverse button is pressed, page numbers are sequentially read out and displayed according to the flowchart of FIG. It is possible to go up and down the page of the program.

"Effects of the Invention" Since the present invention is configured as described above, teletext data can be read and displayed in the forward or reverse direction depending on the page number. Moreover, there is no waiting time of 20 to 30 seconds on average as in the past, and the designated program can be displayed immediately after selection.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a teletext receiving apparatus according to the present invention, and FIGS. 2 and 3 are flowcharts. (1)...TV video signal input terminal, (7)...Bucket buffer, (9)...CPU, (10)...
Pass line, (11)...Program ROM, (15
)...Memory, (20)...System, CP for system control
U, (30)...remote control, (31)...light receiving section. Applicant: Fujitsu General Bi Ltd. 2 Figure 3

Claims (1)

[Claims] (1) An extraction 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 program data that stores program data of multiple pages of the converted specific program. a storage memory; a program ROM for commanding to read out program data in the forward or reverse direction according to the order of image processing commands for teletext broadcasting and page numbers of the specific program; and a program ROM for controlling image processing and reading direction. What is claimed is: 1. A teletext receiver comprising a CPU that performs the following operations.