KR970000763B1 - Caption/text broadcasting service method using extended data service - Google Patents

Abstract

A method of caption/text broadcasting service by using of an EDS(Extended Data Service) is disclosed. The method comprises a step of inputting a caption/text broadcasting selection key by a user; a step(A) of determining whether a data applied from a decoder is an EDS control code, i.e., O1H or O2H; a step(B) of determining whether a carrier code representing the EDS transmission data is 02H, a step(C) of determining the mode of a present broadcasting caption/text on the base of the inputted data bit(B2,B1,B0); and a step(D) of outputting a determined caption/text broadcasting status on an OSD screen. Thereby, the user is easily determined a caption/text mode information.

Description

Caption / Text Broadcasting Service Using Extended-Data-Service (EDS)

1 is a schematic block diagram of an apparatus according to the invention.

2 is a flow chart of a microcomputer according to the present invention.

* Explanation of symbols for main parts of the drawings

10: Tuner part 20: Intermediate frequency IC

30: image processing unit 40: data slicer

50: decoder 60: microcomputer

70: OSD processing unit 80: CRT

90: key input device 100: remote control receiver

The present invention provides a caption / text to a user by using caption / text related information included in an extended data service (hereinafter referred to as DES) in a television having a caption broadcasting device. The present invention relates to a caption / text broadcast service method using EDS that enables a broadcast service.

If the user wants to watch caption / text broadcasting, the caption / text broadcasting status can be checked by pressing the caption / text broadcasting mode selection key for each channel program and switching the key. Since it is possible to select and watch a corresponding broadcast after checking as described above, there is a quite troublesome problem of checking caption / text broadcasting status for each channel program each time.

On the other hand, caption / text broadcasting, which has been led by technologically advanced countries such as the United States and Europe, has been expanding into research in the direction of enhancing the efficiency of using an information transmission medium or multiple angles of a television. In addition, since caption / text can transmit various information as well as contents related to television broadcasting, it has been the subject of many studies on the use of television caption / text broadcasting as various information transmission media to related persons and developers. .

As the use of caption / text broadcasting has gradually expanded as described above, the need for standardization in caption / text information transmission has been increased in order to prevent disordered flooding of information using caption / text broadcasting, which is complicated and diversified. On October 22, the data to be transmitted to the caption / text broadcasting line, that is, the specification of the contents and transmission method of the EDS, was announced in draft EIA-608, and future EDS using caption / text broadcasting was It is likely to be transmitted to television by the standard.

The present invention utilizes the EDS data transmission method according to the draft EIA-608 standard as described above, and the user uses the caption / text broadcasting information that can be transmitted as specified in the EDS data contents. It is an object of the present invention to provide a caption / text broadcasting service method using an EDS that provides information on a caption / text broadcasting state currently being broadcasted when a mode is selected.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings of FIGS. 1 to 2.

1 is a schematic block diagram of an apparatus for carrying out the present invention, which includes a caption / text transmitted from a broadcasting station in a television having a data slicer 40 and a decoder 50 and a microcomputer 60; The signal is first received by the tuner unit 10 inside the television and filtered by the intermediate frequency IC 20 at an intermediate frequency, and the broadcast signal passing through the intermediate frequency IC 20 is output to the screen of the television. Caption / text data including EDS data, which is output to the image processor 30 and transmitted during the 21st vertical blanking period by the data slicer 40 for various processing, is sliced and sent to the decoder 50.

Caption / text data extracted by the data slicer 40 is decoded by the caption decoder 50 and applied to the microcomputer 60.

At this time, when the user inputs a signal from the key input device 90 or the remote control receiver 100 receiving the remote control signal, the microcomputer 60 determines whether it is EDS transmission according to the content of the code input by the decoder 50. Then, the program according to the present invention is driven with reference to the EDS transmission data.

2 is a flowchart of the microcomputer 60 according to the present invention, which starts with a user inputting a caption / text broadcast mode selection key, and if the data applied from the decoder 50 is 01h or 02h indicating an EDS control code. Performing the next step, otherwise terminating (A), checking whether the input EDS carrier code is 07h indicating the contents of the EDS transmission data, and performing the next step if it is 07h, otherwise terminating (B); Next, analyzing the bits (b2, b1, b0) of the input data to determine the mode of the caption / text broadcasting currently on the air, and outputs the determined caption / text broadcasting status on the screen to the OSD It consists of step (D).

When the present invention is described in detail based on the action and effect according to the processing flow consisting of the above flow as follows.

First, according to the transmission method of EDS data proposed by draft EIA-608, EDS data is transmitted together with caption / text data in the 21st vertical blanking period of the television broadcast signal. While both are used, EDS data uses only field 2.

In addition, the EDS transmission is composed of a control code for indicating that the EDS transmission is beginning or being transmitted, a carrier code for informing information about the contents of the data to be transmitted, and a data code containing actual information.

The details are shown in detail in draft EIA-608, where the codes used in the present invention are described. The control codes indicating that the EDS information is currently being used and the start or transmission of EDS transmission are 01h and 02h, and the EDS data are The EDS carrier code indicating information about the caption / text broadcasting status currently being broadcast is 07h, and the data about the EDS caption / text broadcasting status is composed of 2 to 8 character codes, so that each character code is a caption / text broadcasting. Indicates the state. That is, there may be 2 to 8 broadcasting caption / text broadcasting.

In addition, each character code has the first bit b6, which is formed in the same format, is always set to '1', and bits b5-b3 indicate information about a caption / text broadcasting language, and bits b2-b0. Indicates information about the mode of the actual caption / text broadcast.

At this time, the caption / text broadcast mode indicated by the bits b2-b0 is as follows.

In the EDS configured as described above, the caption / text broadcast data is serviced using field 2 of the caption / text broadcast, which is received by the tuner unit 10 like the broadcast signal and frequency filtered by the intermediate frequency IC 20, and the data The caption / text broadcast data sliced by the slicer 40 is sent to the decoder 50.

The microcomputer 60 analyzes the code decoded and input by the decoder 50 and uses it for the processing according to the present invention. That is, when the caption / text broadcast mode selection key is input from the user, the control code inputted by decoding the EDS data currently received by the decoder 50 to perform the caption / text broadcast service is 01h or 02h, and the carrier code (A, B) checks if is 07h.

If it is determined by the above steps A and B that the EDS data to be input next is information on the caption / text broadcasting state, then the EDS data is input to analyze the input EDS data code.

That is, the caption / text broadcasting mode is determined by checking the bits b2, b1 and b0 of the EDS data code. For example, when the bits b2, b1 and b0 are all '1', the field of the current television is used. Indicates that text is being broadcast through channel 2 of 2, and the language being used is represented by bits b5, b4, and b3.

The microcomputer 60 outputs the information regarding the caption / text broadcasting state determined as described above to the OSD processing unit 70, and the information about the caption / text broadcasting state is processed by the OSD processing unit 70 to the screen. Is output.

At this time, the user can select and view a desired caption / text broadcast through the information on the caption / text broadcast status displayed on the screen.

As described above, the caption / text broadcasting service method using the EDS of the present invention uses the EDS data transmission method according to the draft EIA-608 standard, and the caption / text broadcasting that can be defined and transmitted in the contents of the EDS data. When the user selects the caption / text broadcasting mode, the user can provide the information about the caption / text broadcasting status currently being broadcasted so that the user can watch the caption / text broadcasting. Caption / text broadcasting mode selection key is pressed, the caption / text broadcasting state can be confirmed by switching the key, and after confirming as described above, the conventional inconvenience of selecting and viewing the corresponding broadcasting can be eliminated. Of TV broadcasting by maximizing and using EDS data through text / text broadcasting. It is effective to increase efficiency.

Claims (1)

Starting with the input of the caption / text broadcast mode selection key by the user, if the data applied from the decoder 50 is 01h or 02h indicating the EDS control code, perform the following steps; otherwise, terminate the processing (A) and Check whether the input EDS carrier code is 07h indicating the contents of the EDS transmission data, and if it is 07h, perform the next step; otherwise, terminate the processing (B), and then the bits (b2, b1, b) analyzing the caption / text broadcasting mode currently being broadcast; and (c) outputting the determined caption / text broadcasting status to the screen by the OSD (D). Way.