JPS63189076A - Teletext receiver - Google Patents

Abstract

PURPOSE:To display a data immediately after the selection by providing a memory storing data of plural programs converting a teletext signal into a digital signal and a control circuit commanding any forward/reverse readout in response to a program number. CONSTITUTION:A signal inputted from a television video terminal 1 is subjected to the extraction of the 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 by a CPU 9. Then the program number is stored simultaneously. In selecting the program number of an object teletext by using a remote controller 30, the data is extracted and displayed from the memory 15 by using the main CPU 9 via a system control CPU 20. Then the teletext data of designated program is displayed in the designated order by the designation of forward/reverse direction.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a teletext reception system in which teletext signals stored in a memory are read out and displayed in the forward or reverse direction according to the program number. It's about machines.

``Prior Art'' In general, in one text broadcast, the transmission 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 program number.

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and includes an extraction circuit for extracting and processing a teletext signal from an input television video signal.

a circuit for converting the teletext signal into a digital signal; a memory for storing the converted program data of a plurality of programs; and a circuit for converting the teletext signal into a digital signal; The device is equipped with a program ROM that issues a reading command, and a CPU that controls image processing and the reading direction.

``Operation'' When the program number forward button or reverse button is pressed, the data is read out and displayed in the order of the program numbers stored in the memory up to now.

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

(1) is a TV video signal input terminal, and this video signal input terminal (1) is connected to a synchronization signal generation circuit (3) and a data/clock generation/main circuit (4) via a waveform equalization circuit (2). The data/clock generation circuit (4) is connected to an error correction circuit (6) via an interface (5), and is further connected to a bucket buffer (7) for temporarily storing program data. along with the path buffer (8
) is combined with (9) is the main CPU, and this main c
P 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), and a CGROM (16).
, a printer interface (17), a melody processing CPU (18), a CRT C (19), and a system control CPU (20).

The main 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 (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) is coupled, the TV interface (25) and KGB encoder (27) are coupled, and this TV interface (25) and RGB! N: I-da (
27) are coupled to TV connection terminals (28) and (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.

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 performed in Vd cycles to store teletext program data in the memory (15). At this time, the program number is simultaneously stored in the program number table in the memory (15). This program number data can be retrieved from the index packet of the broadcast signal, or manually or manually from the program number data.
U (9) to import and 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 CPU (9) via U (20). Then, the main c p u (9)
The program data of the program selected by is stored in the memory (15).
and display the specified program. If you press the forward button while the screen is displayed, the flowchart in Figure 2 will show the
When the reverse button is pressed, the program 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 according to the program 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 DESCRIPTION OF THE DRAWINGS 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, (2o)...System control C'P
U, (30)...remote control, (31)...light receiving section.

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, a memory that stores the converted program data of multiple programs, and a teletext signal. It is characterized by comprising a program ROM that issues a command to read program data in the forward or reverse direction according to the order of the image processing command and the program number, and a CPU that performs image processing control and control of the read direction. teletext receiver.