JPS63189075A - Teletext receiver - Google Patents

Abstract

PURPOSE:To sequentially display a data from a leading page by extracting and digitizing a teletext signal, storing plural program data and arranging the data of the designated program data from the leading page and reading it out sequentially. 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 a 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 by a CPU 9. In selecting the program number by a remote controller 30, the CPU 9 extract and displays sequentially the program data in the memory 15 by the CPU 9 from the leading page. When there is no page not stored, the data of the corresponding page is awaited and read out sequentially.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a teletext receiver that sequentially reads teletext signals randomly stored in a memory from the first page.

``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 one program or page is selected, it will be displayed for a certain period of time.

Therefore, it is desirable to store the specified program in memory in advance and display the specified program immediately after selection, but in this case, since it is stored randomly in memory, each program is read and displayed sequentially from the first page. It is necessary.

``Means for Solving the Problems'' This Yoshiaki was made to solve the above-mentioned problems, and includes an extraction circuit that extracts and processes a text broadcasting signal from an input television video signal, and a A circuit that converts a broadcast signal into a digital signal, a program data storage memory that stores the converted signals of multiple programs, and a program data storage system that arranges multiple program data related to the specified program in the memory from the first page by specifying one program. A program ROM that issues commands to read out program data from the first page from the program data storage memory;
and a CPU that controls the arrangement of a plurality of program data, controls image processing, and controls reading from the first page.

"Operation" A plurality of pages of a plurality of programs are randomly stored in advance in the program data storage memory. Here, when the program number of the desired teletext broadcast is selected using the remote control, the stored program data is sequentially read out and displayed from the first page for each program.

If the first page is not stored, wait for the first page to arrive, store it, and then read out and display from the first page.

"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)
is combined with (9) 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 program data for multiple teletext programs (15), a CGROM (16),
Printer interface (17), C for melody processing
It is coupled to P U (1g), CRT C (19), and system control CPU (20), respectively.

The raw 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) has V-RAM (2
6) is coupled, and the TV interface (25) and RGB encoder (27) are coupled, and this TV interface 7r,-2 (25) and RGB encoder (27) are connected to the TV connection terminal (28). ) combined with (29),
It is.

The system control 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.

The TV video signal input from the TV video signal input terminal (1) is sent to the data/clock generator 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 the BEST (6). Before the next Vd period, the bucket buffer (
The program data stored in 7) is sequentially transferred to and stored in the program data storage memory (15) by the main CPU (9). The above operation is performed in Vd cycles.

Program data of a plurality of teletext programs are stored in a program data storage memory (15).

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 CPU (9) via U (20). Then, a plurality of program data related to the selected program in the program data storage memory (15) are sequentially retrieved from the program data storage memory (15) starting from the first page and displayed. When the first page is not stored in the memory (15), the system waits until the first page arrives, stores it, and then sequentially reads and displays it from the first page. If other pages are not stored, wait until they arrive in the same way and read them out in order.

"Effects of the Invention" Since the present invention is configured as described above, program data randomly stored in the memory can be read from the first page. 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]

The figure is a block diagram showing an embodiment of a teletext receiver according to the present invention. (1)...TV video signal input terminal, (7)...Bucket buffer, (9)...Main CPU, (10)...
・Pass line, (11)...Program ROM, (1
5)...Memory for storing program data, (20)...
System control CPU, (30)...Remote controller, (31
)···Light receiving section.

Claims (2)

[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 a program data storage memory that stores the converted signals of multiple programs. , a command for arranging a plurality of program data related to a specified program in the memory from the first page based on a program specification; a teletext image processing command; a command for reading program data from the first page from the program data storage memory; What is claimed is: 1. A teletext receiver comprising: a program ROM that performs the following operations; and a CPU that controls the arrangement of a plurality of program data, controls image processing, and controls reading from the first page. (2) The teletext receiver according to claim 1, wherein when the first page is not stored, the CPU waits for the first page to be stored and then sequentially performs reading control.