JPS63189074A - Teletext receiver - Google Patents

Abstract

PURPOSE:To display a program data instantly in a prescribed order by converting a teletext signal into a digital signal, storing plural programs, and arranging the program data designated by the program designation in the prescribed order. 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, converted into a digital signal and the program data per 1Vd is stored in a packet buffer 7. Then the data is stored in a program data storage memory 15 sequentially by a main CPU 9 before the next Vd period reaches. When a program is selected by a remote controller 30, a program selection number data is sent to the main CPU 9 via a photodetection section 31 and the system control CPU 20, plural program data relating to the program number selected in the memory 15 are arranged in a prescribed order and extracted and displayed sequentially from the memory 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a teletext receiver that arranges and reads out teletext signals randomly stored in a memory in a predetermined order. be.

``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.

Therefore, it is desirable to store the specified program in memory in advance and display the specified program immediately after selection. However, in this case, since the specified program is stored randomly in the memory, it is necessary to display it in a predetermined order for each program or page. It is necessary to read and display the data in an array.

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 for converting a teletext signal into a digital signal; a program data storage memory for storing converted signals of a plurality of programs; and a program data storage memory for storing a plurality of converted program signals; a program ROM that issues commands for arranging, image processing commands for teletext broadcasting, and commands for selectively reading out program data from the program data storage memory;
It is equipped with an image processing microprocessor that performs arrangement control of a plurality of data, image processing control, and selective readout control.

"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 target teletext broadcast is selected using the remote control, the stored program data is arranged in a predetermined order for each program or for each page, and is sequentially read out and displayed.

"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), and a CGROM (16).
, printer interface (17), melody processing CPU (1B), CRT C (19), system
and a system control CPU (20).

An interrupt circuit (21) is also connected to the main CPU (9), an external device printer (22) is connected to the printer interface (17), and the melody processing CPU (18) 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 (19N, - is V-RAM (26
) is coupled to the TV interface (
25) and RGB encoder (27) are combined, and this T
V interface (25) and RGB encoder (27)
) are coupled to the TV connection terminals (28) (29).

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, program data per lVd is stored in the bucket buffer (7) via the BEST (6). Before the next Vd period begins, the program data stored in the bucket buffer (7) is sequentially transferred and stored in the program data storage memory (15) by the main CPtJ (9). The above operations are carried out at Vd intervals to store program data of a plurality of 1° teletext programs in the 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 arranged in a predetermined order and sequentially taken out from the program data storage memory (15) and displayed.

"Effect of Decay" Since the present invention is configured as described above, program data randomly stored in the memory can be arranged and read out in a predetermined order. 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 making a 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, (
15)...Memory for storing program data, (20)...
・System control CPU, (30)...Remote control, (3
1)... Light receiving section.

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 program data storage circuit that stores the converted signals of multiple programs. A memory, a command for arranging a plurality of data related to the designated program in the memory in a predetermined order according to a program specification, an image processing command for teletext broadcasting, and selective reading of program data from the program data storage memory. 1. A teletext receiver comprising: a program ROM for issuing commands; and an image processing microprocessor for controlling arrangement of a plurality of data, controlling image processing, and controlling selective reading.