JPH05191787A - Teletext receiver - Google Patents

Abstract

PURPOSE:To attain conversion of a content of a teletext to data suitable for computer processing automatically by converting a broadcast character code into a specific code. CONSTITUTION:When a channel number differs from a channel number received precedingly, a reception tuning circuit 1 revises the number for tuning. A teletext radio wave is received and a teletext digital signal is extracted and one pattern is formed from this signal. Character recognition is implemented from this pattern. Then a sentence in lateral lines is estimated from the pattern, vertical spaces and a space between characters are searched, a character picture part is detected by a pattern generating circuit 2 and the result is converted into a character code by a signal conversion circuit 3. One pattern is converted and a picture by one pattern is converted into information of a character code string, data coding a channel number and a date are added to this information by a symbol addition circuit 4 and the formed data are fed to a computer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a teletext receiving device that enables storage and processing of character codes.

[0002]

2. Description of the Related Art In a conventional teletext receiver, a viewer first receives a television signal by designating a program channel.
The character code for teletext was decoded (decoded) to display an image or print out.

[0003]

However, in the conventional teletext receiving apparatus, since the teletext is received and the intended television screen is viewed or the screen is printed out, the broadcast is broadcast. In the case of collecting past information or performing statistical processing, it is necessary to convert the content of the teletext into an input format suitable for a computer, which requires extra work.

Therefore, in view of the above point, an object of the present invention is to provide a teletext receiving apparatus configured so that the content of the received teletext can be automatically converted into data suitable for computer processing.

[0005]

To achieve the above object, the present invention provides a means for receiving a character broadcast and extracting the broadcast digital character code, and the extracted character code for a predetermined information. A means for converting the encoded data into a coded data suitable for processing is provided, and the coded data is supplied to an external information processing device.

[0006]

According to the present invention, data is automatically supplied to an external information processing device (computer or the like) by converting a broadcast character code into a specific code in the teletext receiving device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the present embodiment, by providing the teletext receiving device with a function of encoding an image broadcast as a teletext into data that can be handled by a computer, a teletext corresponding to a preset channel number can be received and obtained. The specified character code is transferred to an external computer.

In FIG. 1, reference numeral 1 is a receiving circuit for detecting a digital signal for teletext from a radio wave for teletext.
Is a screen generation circuit for generating one television screen from the detected digital signal, 3 is a signal conversion circuit for performing character recognition from the screen generated by the screen generation circuit 2 and converting it into a character code, 4 is data management by a computer Therefore, a symbol adding circuit 5 for adding the channel number and date and time information to the converted character code is an interface circuit for transferring the data constituted by the symbol adding circuit 4 to the computer.

The operation of this apparatus will be described with reference to the operation flowchart shown in FIG.

The device is initialized (S00), and the channel number is acquired from the computer or the channel switch (S10). When the channel number is different from the one received last time (S20), the reception tuning circuit is changed (S3
0) and synchronize. Receives radio waves for teletext (S4
0) and take out the digital signal for teletext (S5
0). One screen is constructed from this digital signal (S60). Up to this point corresponds to 1 and 2 in FIG.

Subsequently, character recognition is performed from this screen. Character recognition can be easily performed using current technology. In the case of the present embodiment, a horizontally written sentence is assumed from the screen, and upper and lower spaces and spaces between characters are searched to detect the character image portion (S70). Character recognition is performed from the character image (S80),
Convert to character code. One-screen conversion is performed to generate a one-screen image into character code string information (S90). This information is provided with data in which a channel number and date and time are coded so that the data can be processed by a computer (S100). S
The data configured by 100 is sent to a computer (information processing device) (S110). With this, the processing of one cycle is completed, and the process is performed again from the acquisition of the channel number.

As another embodiment of the present invention, instead of analyzing one screen to detect a character image portion, one raster is analyzed from a digital signal to detect a character.
The screen generation circuit inside can be omitted, which leads to the saving of the screen buffer.

Further, there is also a method of searching the channels in a preset order by making the channel numbers programmable in order to obtain the channel numbers.

Another method is to secure an image buffer for two screens in the image generation circuit, compare it with the previously constructed image screen, and perform character recognition when the screen is changed. In this case, character recognition and data transfer can be omitted, and retransmission of the same image can be prevented.

[0016]

As described above, according to the present invention, since the contents of the teletext can be directly transferred to the external information processing device, not only the current information but also the past information can be easily processed. Is possible.

Furthermore, depending on the processing capability of the information processing apparatus, the following expanded use of teletext can be introduced.

(1) Retrieval of past information, (2) Information comparison, (3) Evaluation of information over time, (4) Information exchange via network.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of this embodiment.

[Explanation of symbols]

 1 reception circuit 2 screen generation circuit 3 signal conversion circuit 4 symbol addition circuit 5 interface circuit

Claims (1)

[Claims] 1. A unit for receiving a character broadcast and extracting a broadcast digital character code; and a unit for converting the extracted character code into encoded data in a form suitable for predetermined information processing. A teletext receiving device, characterized in that the encoded data is supplied to an external information processing device.