JPH07255042A - Teletext transmitter receiver - Google Patents

Abstract

PURPOSE:To enable easy error-free operation by providing an exclusive key for program contents and storing the contents of the exclusive key in a program contents storage memory. CONSTITUTION:A fetch part 1 extracts program data from a video signal and the extracted program data are stored in a memory 6, program by program, together with program numbers. The program numbers are inputted to a central processing unit(CPU) 2 through an interface 8 and the program data corresponding to the program number are read out. The program contents storage memory 4 stores the program data by program contents. On the basis of the program data in the memory 4, a sent teletext program is received and decoded, character codes showing respective program contents are extracted from the program data, and the contents of the extracted character codes are written in the memory 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a teletext transmission / reception apparatus, and more particularly, to characters, graphics, and
The present invention relates to a teletext transmission / reception device for easily realizing an operation process and a program process in a teletext transmission / reception device that demodulates teletext data on which program data including additional sounds is superimposed.

[0002]

2. Description of the Related Art In a teletext system, teletext data is transmitted in a data packet format with a unit length of data superimposed on a predetermined horizontal scanning period within a vertical blanking period of a television signal. It The teletext data includes not only text information but also information data such as figures and additional sounds. Therefore, in the following description, these data are collectively referred to simply as program data.

9A and 9B are block diagrams of a conventional teletext transmission / reception device. FIG. 9A shows a receiving device, and FIG. 9B shows a transmitting device. In the figure, 11 is a MIX (mixing device), 12 is an RF modulator, 13 is a transmission antenna, and 1
Reference numeral 4 is a receiving antenna, 15 is a tuner, 16 is an IF detector, 17 is a teletext duder, 18 is a MIX (mixing device), 19 is a monitor, and 20 is a MIX (mixing device) 21 is a speaker.

As shown in FIG. 1A, in a broadcasting station, teletext program data is mixed with a television signal by MIX, modulated by an RF modulator 12, and transmitted from an antenna 13. On the receiving side, the tuner 15 receives the television radio wave received from the antenna 14, and the IF detection circuit 16 extracts the video signal and the audio signal. The teletext data is decoded by the teletext decoder 17, mixed with each video signal and audio signal by the MIX 18, 21 and presented to the monitor 19 and the speaker 21.

FIG. 10 is a block diagram of a conventional teletext receiving apparatus. In the figure, 31 is a capturing section, 32 is a CPU (central processing unit), and 33 is a CGROM (character Read Only Memor).
y), 34 is a display control unit, 35 is a memory, 36 is a music synthesizer, and 37 is an I / F (interface).

A video signal detected by a tuner (not shown) is input to the capturing unit 31. The acquisition unit 31 extracts the program data from the video signal and corrects the error. This program data, together with the program number, is stored in the memory 35 for each program.
Remember. To reproduce the program data stored in the memory 35, the operator inputs the program number to be reproduced by key operation. This program number is the interface (I /
F) 37 to the central processing unit (CPU) 32. By the action of the CPU 32, the program data corresponding to the input program number is read.

When the read program data is character information and graphic information, the video signal (R,
G, B, Y) is output. If the read program data is an additional sound, it is output as a sound signal via the music synthesizer 36. The CGROM (character memory) 33 stores the shape (font) of the character corresponding to the character information and is used when converting the character information into a video signal.

As a known document describing a conventional character multiplex broadcasting transmitter / receiver, for example, Japanese Patent Application Laid-Open No. 4-1267 is available.
There is publication No. 8. In this publication, in order to be able to receive the program having the specified content on any channel by operating the key for specifying the program content such as news or weather forecast, the program is previously stored in the memory for each program content. A channel for transmitting information and its program number are stored as a set, and if the user operates a key for designating the program content, the system is automatically switched to the channel transmitting the program information, and The number data of the program is given to the character multiplex data processing.

That is, it has a memory in which stored channel data and program number data transmitted on this channel are grouped and stored for each program content (news, weather forecast, stock information, etc.), and the user has a program content designation key. By operating (dedicated key for news etc.), the operation channel data and program number data are converted, and the simple operation that enables direct program selection to perform program access, decoding of program data, and presentation processing was shown. It is a thing.

[0010]

In the teletext system, a plurality of programs are transmitted in a time division manner. A wide variety of programs are being sent, including news, weather information, stock information, karaoke, and various information.
Here, when a user wants to watch a stock information program, first, a broadcasting station is selected, a table of contents (generally 000 programs in the text broadcasting) program of the character broadcasting is selected, and stock information is flowed from the contents. You must specify the program number you are in. Also,
In some cases, looking at the table of contents, the broadcasting station may not be disclosing stock information. In that case, you have to switch to a different broadcasting station and check the contents of the teletext again. As mentioned above,
Designating a required program is extremely inconvenient. There is also a method as described in the above-mentioned Japanese Patent Laid-Open No. 12678/1992, but it does not follow when the content of a teletext program is changed or abolished. However, there are drawbacks that the user will have to go and that the user cannot set the original setting key for the direct program setting key.

The present invention has been made in view of such circumstances, and a dedicated key for program content (news, weather information, stock information, etc.) is provided, and the content of the dedicated key is the latest in the text broadcasting. It is an object of the present invention to provide a teletext transmission / reception apparatus which always searches the program content and stores it in a program content storage memory so as to realize a simple operation without error.

[0012]

In order to achieve the above object, the present invention stores (1) a capturing unit for capturing a video signal, and program data extracted from the video signal by the capturing unit. A memory, a central processing unit for reading the program data stored in the memory, and an output unit for outputting the program data read by the central processing unit as a video signal and a sound signal. Letters, shapes,
A teletext receiving device for demodulating teletext data in which program data consisting of additional sounds is demodulated, having a program content storage memory for storing program data for each program content, and transmitting teletext programs based on the program data in the memory. Receiving / decoding, extracting a character code indicating each program content from the program data, writing the content of the extracted character code in the memory, and (2) presenting the program content data. The program content can be set without changing the program content, and further, (3) the program content dedicated key is equipped with a user key, and the user can set the direct program by setting it in the memory in advance. It is characterized by doing.

[0013]

The teletext transmission / reception apparatus of the present invention having the above-described structure is a teletext broadcast in which program data consisting of characters, figures, and additional sounds are superimposed in the vertical blanking period, and which responds to given program number data. In a teletext receiver for demodulating teletext data, program data in a memory stored for each program content is used to receive and decode a teletext program to be transmitted, and to generate the memory data, program data is selected from among the program data. The character code indicating each program content is extracted, and the broadcast channel and program number are written in the memory area of the content. Further, the program content data for facilitating the operation by the viewer is set in the program data by providing the multiplexing means without changing the content of the presented program. Further, in order to generate the memory data, the code indicating each program content is automatically extracted from the program data, and the broadcast channel or program number of the content having the content is written. Furthermore, the dedicated program content key is equipped with a user key, and the user can set a direct program by setting it in the memory in advance, so the dedicated key for the program content (news, weather information, stock information, etc.) It can be easily realized by pushing the button, and the desired teletext program can be surely viewed by distinguishing the character code from the broadcast content and the program content code from the transmitting side and decoding the code.

[0014]

Embodiments will be described below with reference to the drawings. FIG. 1 is a configuration diagram for explaining an embodiment of a teletext transmission / reception device according to the present invention.
Is a CPU (central processing unit), 3 is a CGROM (character Read Only Memory), 4 is a program content storage memory, 5 is a display control unit, 6 is memory, 7 is a music synthesizer, 8 is an I / F (interface), 9 Is a tuner controller.

A video signal detected by a tuner (not shown) is input to the capturing section 1. The capturing unit 1 extracts the program data from the video signal and performs error correction, and the extracted program data is stored in the memory 6 together with the program number in program units. To reproduce the program data stored in the memory 6, the operator inputs the program number to be reproduced by key operation. This program number is the interface (I
/ F) 8 to the central processing unit (CPU) 2. The program data corresponding to the input program number is read by the action of the CPU 2.

When the read program data is character information and graphic information, the video signal (R,
G, B, Y) is output. If the read program data is an additional sound, it is output as a sound signal via the music synthesizer circuit 7. The CGROM (character memory) 3 stores the shape (font) of a character corresponding to the character information and is used when converting the character information into a video signal. The program content storage memory 4 stores initial data when the system is first operated. The tuner control section 9 selects the channel when the channel data is given by the CPU 2.

FIG. 2 is an external view of a remote control transmitter for a teletext transmitter / receiver according to the present invention, in which a dedicated key for designating program contents is added. "Power" key, characters, "TV", "news", "weather",
There are keys such as "stock" and "user", and in addition to them, there are channel keys "1" to "8".

FIG. 3 is a diagram showing a program number storage table for each program content for each channel. When receiving the teletext, first, the code recognition in the header sentence data unit of each program (lower case (SS
Z) is limited to hiragana, katakana, and alphanumeric characters, so there is little identification symmetry, and program contents such as "news" and "tenki" are input). here,
If there is a character code that matches the program content code,
The channel and program number are compared with the memory data shown in FIG. 3, and if they are the same, they are left as they are, and if they are different, they are additionally written in the memory.

That is, a character broadcast in which program data consisting of characters, figures, and additional sounds is superimposed in the vertical blanking period,
In a teletext receiving device for demodulating teletext data according to given program number data, a transmission teletext program is received and decoded by program data in a memory stored for each program content. Further, in order to generate the memory data, the character code indicating each program content is extracted from the program data, and the broadcast channel and the program number are written in the memory area of the content.

The character code indicates the name of the program described in the header sentence area in the program data, as shown in FIG. 4, and the program name and program number in the index program. The memory area is a memory for storing program data according to the program content in the preceding sentence. The broadcast channel and program number are the broadcast channel and program number extracted from the program.

FIG. 5 is a diagram showing a decoding flowchart of the teletext transmission / reception apparatus according to the present invention. The "news" among the keys shown in FIG. 2 will be described below as an example. First,
It is judged whether it is a header statement (step 1), and if it is a header statement, it is judged next whether it is "d" (st
ep2). If it is “d”, the next code “d” (step
3,4), "-" (steps 5,6), "su" (steps 7,8). If the header text is "news" in steps 1 to 8 above, check the program content table (st
(ep9), write the program number of the channel (step1
0).

That is, first, when the operator presses the "news" key, the "news" code from the I / F8 becomes CP.
Read into U2. The CPU 2 reads the news program number in the current channel from the memory (the program content table created by the above process) 6, searches for the program of that program number, and decodes it. Also, in the case of having a buffer memory dedicated to these program contents, the program data is read therefrom and decoded. When the operator wants to watch a different news program, the "news" key is pressed again, and the CPU 2 reads and decodes the next program number in the program content table.

After that, the CPU 2 replaces the program numbers in the news section of the program content table (always the program with the highest frequency first). If there is no "news" program on that channel, the CPU 2 gives the tuner control section 9 data of a different channel, reads the program number from the "news" program content table for that channel, and decodes it.

FIG. 6 is a diagram showing another flowchart for decoding the teletext transmission / reception device according to the present invention. The operation of each step is controlled by the CPU 2. Less than,
The steps will be sequentially described. First, check foreground color = background color (is it special mode data?) (Step 11),
If NO, it jumps to the normal processing routine. In the mode of the present invention, the code is read (step 12) and the code is loaded (step 13). After extracting the last data (step1
4) Check the program content code (recognition of which character code such as news, weather, stock, etc., or a predetermined code) (step 15), and if NO, jump to normal processing. Yes
If so, the channel and program number are compared with the memory data shown in FIG. 3 (step 16). If they are the same, they are left as they are, and if they are different, additional writing is performed in the memory (step 17). As described above, since there is the program content data from the transmitting side, it is possible to set the program with higher accuracy.

That is, the program content data for facilitating the operation of the viewer in the program data is superimposed on the auxiliary data in the program without changing the content of the presented program. Insert the program content code into
Providing the multiplexing means facilitates program setting. Further, in order to generate the memory data, the code indicating each program content is automatically extracted from the program data, and the broadcast channel and the program number are written in the memory area of the content. It should be noted that the automatic extraction means not the hardware but the recognition of the multiplexed (added) data by the microcomputer.

FIG. 7 is a diagram showing a logical form of a teletext display screen. In the figure, 10a is a television image, 10b is a raster image, 10c is a display control image, 10d is a background image, 10e is a foreground image, and 10f. Is a pattern image. By writing a character or a figure on the pattern surface 10f, the pattern surface in that portion is made opaque, and there, it appears in the foreground color and the background color.
The display control is hidden characters or flushing. According to the transmission method of the present invention, a code or character code indicating the content of the program is transmitted at the transmission side with the foreground color and the background color being the same at the beginning of the program data. In addition, a receiver that does not support the present invention has the same foreground color and background color and is not presented.

FIG. 8 is a diagram showing a display example of a program content table change screen according to the present invention. It is also possible to modify the manual of the program content table using the remote control transmitter. This allows the operator to arbitrarily change unnecessary setting programs. That is, the dedicated key for the program content is equipped with the user key so that the user can set the direct program by setting it in the memory in advance. In addition, it is possible to set a direct program,
When the user presses the user key, the microcomputer reads the channel and program number from the program content table of FIG. 8 and decodes the program.

[0028]

As is apparent from the above description, the present invention has the following effects. (1) Effect corresponding to claim 1: In order to provide memory for storing each program content and to generate this memory data,
Since the character code indicating each program content is extracted from the program data and the broadcast channel and program number are written in the memory area of the content, a dedicated key for the program content (news, weather information, stock information, etc.) By pressing the button, the desired teletext program can be viewed easily by distinguishing the character code from the broadcast content and decoding it. (2) Effect corresponding to claim 2: Since the character code indicating the program content may not be present or the arrangement may be different only with the character code indicating the program content, the program content data is presented and the program content is changed. Instead, the transmitter is provided with a multiplexing means, and the desired teletext program can be surely viewed by the program content code and its decoding from the transmitting side. (3) Effect corresponding to claim 3: The program content dedicated key is equipped with a user key, and the user can set a direct program by setting it in the memory in advance.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of a teletext transmission / reception device according to the present invention.

FIG. 2 is an external view of a remote control transmitter for a teletext transmitter / receiver according to the present invention.

FIG. 3 is a diagram showing a number storage table of each program content for each channel according to the present invention.

FIG. 4 is a diagram showing a character code according to the present invention.

FIG. 5 is a diagram showing a flowchart of decoding of the teletext transmitting / receiving apparatus according to the present invention.

FIG. 6 is a diagram showing another flowchart of the decoding of the teletext transmitting / receiving apparatus according to the present invention.

FIG. 7 is a diagram showing a logical form of a teletext display screen according to the present invention.

FIG. 8 is a diagram showing a display example of a program content table change screen according to the present invention.

FIG. 9 is a configuration diagram of a conventional teletext transmission / reception device.

FIG. 10 is a block diagram of a conventional teletext receiver.

[Explanation of symbols]

e1 ... Capture unit, 2 ... CPU (central processing unit), 3 ... CG
ROM (character ReadOnly Memory), 4 ... Program content storage memory, 5 ... Display control unit, 6 ... Memory, 7 ... Music synthesizer, 8 ... I / F (interface), 9 ... Tuner control unit.

Claims (3)

[Claims] 1. A capturing unit for capturing a video signal, a memory for storing program data extracted from the video signal by the capturing unit, a central processing unit for reading out the program data stored in the memory, An output unit that outputs the program data read by the central processing unit as a video signal and a sound signal, and demodulates teletext data in which program data including characters, figures, and additional sounds are superimposed in the vertical blanking period. The teletext transmission / reception device has a program content storage memory for storing program data for each program content, receives and decodes a transmitted teletext program based on the program data in the memory, and selects each program content from the program data. A character broadcast transmitting / receiving device, characterized in that the character code indicative of is extracted and the content of the extracted character code is written in the memory. 2. The teletext transmission / reception apparatus according to claim 1, wherein the program content data is set by providing a multiplexing means without changing the content of the presented program. 3. The program content dedicated key is equipped with a user key, and a user can set a direct program by setting the key in the memory in advance.
The described teletext transmission / reception device.