KR100200205B1 - Interactive TV Broadcasting Method Using Selectable Subtitles of Viewers - Google Patents

Abstract

The present invention relates to an interactive television broadcasting method using a viewer selectable type subtitle, and more particularly, to a television broadcasting method in which, in a middle of a broadcast program currently in progress, Transmitting the viewer questionnaire caption by inserting optional caption information; Displaying on a screen a questionnaire caption received at a television receiving apparatus that receives a viewer selectable caption broadcast according to a viewer's selection; Receiving, in the television station, a viewer's telephone response returned in response to a questionnaire caption display displayed on the television receiver; Processing the received telephone call response of the viewer and transmitting the processing result as viewer selectable caption information; And displaying subtitles on the processing result received by the television receiving apparatus.

Description

Interactive TV Broadcasting Method Using Selectable Subtitles of Viewers

The present invention relates to an interactive television broadcasting method using viewer selectable subtitles, and more particularly, to an interactive television broadcasting method using viewer selectable subtitles, in which a viewer and a broadcasting station exchange evaluations of programs with each other, And an interactive TV broadcasting method using the same.

In a television broadcasting, a closed caption broadcasting system is a system in which an caption signal is superimposed on an active section of a television signal so that an open caption system that displays urgent news or notifications by selecting a broadcasting person without selecting a viewer, That is, a closed caption system in which a caption signal is transmitted in a vertical blanking period and is transmitted, a television screen and a metabolism content can be viewed as a caption by a viewer's choice.

Closed Caption closed caption broadcasting has been implemented in the United States since 1978 for the hearing impaired who can not know the contents of the screen without sign language.

In general, since a broadcast program produced by a broadcasting station is transmitted unilaterally to viewers, the opinions of the viewers can not be reflected in the program. Therefore, after the program ends, the opinions of the viewers are collected and reflected in the production of the next program. In particular, TV dramas have a great influence on viewers, and various opinions from viewers are received by broadcasting stations according to the development of drama. However, there is a problem that the TV dramas can not reflect the opinion of the viewer in the middle because the story development which is already fixed is unfolded.

Recently, survey or popularity research using telephone has been carried out. However, since it is conducted by a broadcast program of a specific planned questionnaire or popularity survey separately from the current drama or broadcast program, the audience participation is low, There is a problem in that the reliability of the apparatus is deteriorated. In addition, there has been a problem that a broadcasting station must specifically arrange a broadcast time in order to broadcast such a special broadcast program.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and system for providing a broadcast program, which can transmit a result of a program to a viewer and a broadcasting station by using a viewer selectable subtitle, Type television broadcasting method.

In order to achieve the above object, a method of the present invention is a method for inserting viewer selectable caption information into an arbitrary horizontal line which does not affect a broadcast signal for every field of a television signal in the middle of a broadcast program currently in progress, Transmitting a caption; Displaying on a screen a questionnaire caption received at a television receiving apparatus that receives a viewer selectable caption broadcast according to a viewer's selection; Receiving, in the television station, a viewer's telephone response returned in response to a questionnaire caption display displayed on the television receiver; Processing the received telephone call response of the viewer and transmitting the processing result as viewer selectable caption information; And displaying subtitles on the processing result received by the television receiving apparatus.

FIG. 1 is a block diagram illustrating a configuration of a television broadcasting system for broadcasting, illustrating a configuration of an interactive television broadcasting system using viewer-selectable subtitles according to the present invention.

2 is a block diagram showing a configuration of a television receiver for receiving viewer-selectable caption broadcasting according to the present invention;

3 is a signal configuration diagram showing a configuration of a subtitle signal according to the present invention;

4 is a diagram showing a data packet structure of caption data according to the present invention.

5 is a diagram for explaining a control code according to the present invention;

6 is a block diagram of a Korean character type code table for explaining a configuration of a character code according to the present invention.

7 is a view for explaining a size of a caption area on a screen according to the present invention.

8 and 9 are screen state diagrams showing examples of a viewer questionnaire caption according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention.

FIG. 1 shows the configuration of an interactive television broadcasting apparatus using viewer-selectable caption broadcasting. The audio signal input through the microphone 10 is mixed and amplified in the audio signal processing unit 30 and transmitted to the television signal modulating unit 50. [ The video signal input through the video camera 20 is amplified in the video signal processing unit 40, edited, and transmitted to the television signal modulating unit 50. The television signal modulating unit 50 FM-modulates the transmitted voice signal, AM-modulates the video signal in the left-side full wave mode, frequency-multiplexes the AM modulated signal and the FM modulated signal, And the high frequency output unit 60 amplifies the high frequency signal and transmits the television signal to the air through the antenna.

In the subtitle encoding unit 70, the supplementary information such as the metabolic information related to the television screen or the urgent news or delivery information is input through the character information input unit 71. [ And various control information for caption control are input through the control signal input unit 72. [ The character information input unit 71 includes a keyboard for inputting characters such as Hangul, English, Kanji, and Japanese, and special characters, and outputs the inputted character information as a 2-byte Hangul complete code (KSC5901). The control information input unit 72 includes keypads such as a mode selection key and a function selection key, and outputs the input control information in a 7-bit binary code.

The character code generating unit 73 uses the MSB of each byte of the inputted 2-byte character code as the metadata subtitle / additional information flag, substitutes the MSB into '0' in case of additional information, adds a parity bit to each byte Thereby generating a data packet of a total of 18-bit character codes.

The control code generating unit 74 divides the input 7-bit binary number into upper 3 bits, upper 4 bits, parity bit for the upper 4 bits, control code identification bit for 2 bits, and metablock / addition flag to generate the upper byte A first parity bit, a second parity bit, a 2-bit control code identification bit, and a subtitle / additional information flag for the lower 3 bits are added to generate the lower byte. A parity bit is added to each generated byte to generate a data packet of a total of 18 bits of control code. The details of the data packet will be described later.

The data packet modulating section 75 modulates the data packet generated in the character code generating section 73 or the control code generating section 74 by a digital modulation method.

The synchronous counter 76 receives the synchronous signal provided from the video signal processor 40 and is reset by the vertical synchronous signal, counts the horizontal synchronous signal, and counts the scanning player. The window signal generator 77 receives the count value of the synchronization counter 76 and generates a window signal. The window signal is a driving signal for switching the switching means 78 to superimpose a caption signal on a predetermined specific line of the video signal output from the video signal processing unit 40.

The answering unit 80 is constituted by a conventional answering machine that is connected to the telephone exchange through the telephone line 82 and automatically answers telephone calls received from viewers.

The questionnaire processing unit 90 inputs a call response of the viewer received from the answering unit, performs a survey processing algorithm to derive a processing result, generates viewer-selectable character information and control information corresponding to the obtained processing result To the character information input unit (71) and the control information input unit (72).

2 shows a configuration of a television receiver for receiving viewer selectable caption broadcasting.

The tuner unit 110 demodulates a television signal of a selected channel among the high-frequency signals received by the antenna, and outputs a voice signal and a video signal. The audio signal is transmitted to the audio signal processing unit 120, and is then equalized and amplified and output as a voice through the speaker 130. The video signal is transmitted to the video signal processing unit 140, subjected to luminance and color processing, and then output as an RGB signal. The RGB signal is transmitted to the display driver 160 through the mixer 150 and the display driver 160 drives the CRT 170 in response to the RGB signal transmitted thereby to display the television screen on the screen.

The subtitle decoding unit 200 digitally converts the video signal through the A / D converter 210 and transmits the digital signal to the subtitle processor 230. The sync separator 220 separates the sync signal from the video signal and transmits the vertical and horizontal sync signals to the caption processor.

The caption processing unit 230 generates a clock signal synchronized with the color burst signal of the video signal processing unit 140 to extract a caption data packet from the digital signal. Decodes the extracted data packet, controls the caption processing in response to the decoded control code, reads the character data from the font ROM 240 in response to the decoded character code, and stores the read character data in the display RAM 250. When the pop-on mode is checked, the caption processing unit 230 deletes the reception storing and clearing control codes among the control codes of the receiving buffer, and reads the pop-on character data stored in the display RAM by the line-wrap control code in a scroll manner, Converts the character data into an RGB signal, and transmits the converted RGB signal to the mixer 150. The caption processing unit 230 exchanges control data with the system control unit 180 of the set. The system control unit 180 transmits a caption related command input through the command input unit 19 to the caption processing unit 180 and controls the system in response to the control data transmitted from the caption processing unit 180. [

Referring to FIG. 3, the data line of the caption signal is composed of six cycles of a bit clock synchronizing signal 302, a weed start signal 304, and an 18-bit data string 306.

The bit clock synchronizing signal 302 is a sinusoidal signal of six periods, which can be used for extracting the signal from the subtitle decoder and reading the bit period of 18-bit data. The frequency is fsc / 4 (894.886 kHz). When the phase of the color subcarrier of the corresponding scanning line is 0 °, it starts from a point at a distance of 9.5 usec (34 cycles of the color burst) from the falling edge intermediate point (0H) of the horizontal synchronizing signal, and the phase of the color subcarrier At 180 degrees, the falling edge of the horizontal sync signal starts at a distance of 9.64 usec (34.5 cycles of color burst) from the midpoint (0H). Since this signal is frequency synchronized with the color burst of the corresponding line, a bit clock synchronizing signal can be extracted from the color burst.

The word start signal 304 serves to represent the start of an 18-bit data packet as one period of a sinusoidal signal having fsc / 16 (223.722 kHz) and a phase of 180 degrees.

The data string 306 is composed of 18 bits and the bit rate is fsc / 8 (447.443 kHz) and modulated in the BPSK scheme.

Referring to FIG. 4, the data packet is composed of three parts: a parity (p) in units of Weed, a subtitle / additional information flag (C / T), and a code value. D0 to D8 shall be called lower word, and D9 to D17 shall be called upper word. D17 represents an even parity for D0 to D16. This parity bit is intended to detect errors on the transmission first. D7 and D16 are the subtitle / additional information flags, 0 for the subtitle subtitle, 1 for the additional information, and the values of D7 and D16 must match. This flag is used to maintain the word-based priority. D0 to D6 and D9 to D15 together represent the code value. Code values are interpreted as control codes if D5, D6, D14, D15 are mode 0, otherwise they are interpreted as character codes.

Referring to FIG. 5, the control codes D1, D2, D3, D9, D10, D11 and D12 are control code data bits, and D0, D4, D8 and D13 are parity for control code data bits. The 3-bit code value of the lower word is a code that specifies five functions. The five functions consist of color assignment function, character attribute and roll-up function, display method and roll-down function, position shift function and matrix positioning function. In addition, the 4-bit code value of the upper word of the control code designates 16 sub-functions of each function. D0 is parity for D1, D2, D3 and D4, D4 is parity for D1, D2, D10 and D11, and D13 is parity for D9, D10, D11 and D12.

In addition, the control code is transmitted twice consecutively for secure reception of data, allowing the transcode / matrix designation code and matrix positioning code to be transmitted almost periodically every four seconds. A detailed description of the control code will be given later.

As shown in FIG. 6, character codes D0 to D6 of the lower word and D9 to D15 of the upper word together represent data bits of the KSC5601 code. D8 is an even parity for D0 to D7.

In the present invention, since ASCII code is not used at all, seven bits D0 to D6 correspond to seven bits of the lower byte of KSC5601, and D9 to D15 correspond to seven bits of the upper byte. (Special characters), A3 row (English), A4 row (bearing), A5 row (Greek), AA-AB row (Japan Kana), AC row (Russian), lines BO to C8 (Korean), and CA to FD (Chinese characters). The character code is transmitted only once per character.

The Korean subtitles can be transmitted using any scanning line per field as described above, and one or more transmission scanning lines defined in the field are referred to as channels. Since there are two fields in the interlaced scanning method, NTSC TV can use two channels. In other words, it is possible to use two languages' ambassadors such as voice multiplexes. The ambiguity of Korean subtitles must use odd field channels and other foreign language subtitles should use even field channels. The control codes transmitted for each channel are the same code set, and character codes are all included in KSC9501.

There are two kinds of information transmitted to the caption channel, and the interpretation and display method of the control code differs depending on the type. One of these two is the subtitle associated with the video signal being broadcast, and the other is additional information not related to the broadcast content displayed on the screen.

If both the LSWord of the data packet structure and the MSWord have a value of '0', the code value is interpreted as a control code or character code for display of a metabolic film. In this case, the subtitle is displayed in the form of a subtitle matching the voice signal while covering only a part of the screen to be broadcasted.

It uses only 2 ~ 5 lines of subtitles at the same time, and scrolls, erases, and rewrites the area to display the continuing dialogue.

When transmitted to only one channel, characters of various countries may be used in combination, or may be used only for Hangul or for foreign language. When they are transmitted through two channels, they are separately used for a Hangul exclusive channel and a foreign language exclusive channel, respectively.

Since the metabolism film should coincide with the voice information as much as possible, it has a higher priority than the additional information in occupying the channel in units of two words.

If both the LSWord of the data packet structure and the MSWord have values of the subtitle / additional information flags of '1', the code value is interpreted for display of additional information whether it is a control code or a character code. The additional information display displays text information on the entire screen as in computer communication regardless of the broadcast contents. Do not use the scroll function because it is displayed in full screen.

The additional information does not need to be separated like the metabolic information and the additional information can occupy the channel whenever the metabolism information is not displayed on the channel. However, when the metabolism is to be transmitted, And the channel can be occupied again after the transfer of the subtitles is completed.

The following describes the screen display according to the horizontal writing specification of the subtitle at the receiver.

Referring to FIG. 7, the caption area 702 refers to a maximum area in which the metabolic caption and the additional information can be displayed in the entire effective screen area. The caption area 702 ends at the scanning line 240 starting from the scanning line 41 when viewed in field units of the NTSC TV signal, and thus has a height corresponding to 200 TV scanning lines per field. 10 character lines are all displayed in the entire caption area. The width of the caption area is set to 80 to 85% of the effective scan line width (52.6 uscc). Therefore, the width of all character lines is 80 to 85% of the effective line width.

Since the display cells of Korean, English, and Chinese characters are all composed of 20 bitmaps in the vertical direction, one character line (Row) composed of Korean, English and Chinese characters is composed of twenty TV scanning lines in order to facilitate the implementation.

In each row, the most recent Korean character, which can be displayed in the horizontal direction, is set to 18 characters. The width of one alphabetic letter is half of the width of one alphabetic character, so the maximum number of alphabetic characters that can be displayed on each row is 36. The Romanian language, Arabic numerals, and punctuation marks are the same as in English.

Since the width of one character is the same as the width of one character in Korean, the maximum number of Chinese characters that can be displayed per line is 18 characters.

All characters supported by the KSC5601 code may be mixed and displayed.

If mixed, a minimum of 18 characters and a maximum of 36 characters can be displayed per line.

The control function of FIG. 5 set by the above-described control code will be described in more detail as follows.

The control code consists of a combination of two 9-bit words. LSWord contains bits D1, D2, and D3 for function classification. MSWord contains D9, D10, D11, and D12 bits .

The control codes are classified into color designation, attribute designation, display control, scrolling, cursor movement, row position and column positioning control codes according to their functions.

The color specification control code is a control code transmitted to change the foreground and background color of character data to be transmitted. Therefore, if you want to change the foreground and background of the text you want to send, you can send text after sending the color designation code. The receiver determines the foreground and background colors by the most recently received color control code. Also, foreground and background colors can be changed simultaneously or independently. The background color is Transprent, the image of the program should be displayed in the rest of the display cell except for the character, and the color of the character in each character should be displayed in black, red, magenta, blue, cyan, green, You should treat the outline in a different color.

The character property control code is a control code transmitted to change the attribute of character data. Therefore, if you want to change the attribute of the character you want to transfer, you can send the character code after sending the attribute specification control code first. You can specify normal, underline, flicker, and inverse, since underline, flicker, and inverse are independent, all of these properties can be applied at once.

The function of each attribute-specified control code is as follows.

/ `Underscore: Indicate underline immediately below each character to be displayed.

/ `Blinking: causes the character to blink. The previously displayed portion does not blink, the next displayed portion blinks, and the blink period depends on the implementation of the receiver.

/ `Inverse: Changes the foreground and background colors currently used by the receiver.

/ `Normal: Display the character with the default attribute by resetting all the already specified attributes.

Display Method The control code is a control code transmitted to control the screen display method, and it can designate the screen display, screen erase, reception save, horizontal write, and vertical write.

/ `Display: Display the received problem data directly on the screen (Roll-up, Roll-down) or display the data stored by the 'Receive Storage' control code on the screen.

/ `Save Receive: Save received characters and control codes until the screen is displayed.

/ `Horizontally: Move the next character position to the right of the current character when displaying consecutively received character codes on the screen continuously without intervention of the position change control code.

/ `Vertical write: Move the next character position to the bottom of the current character when continuously displaying the character code continuously received without the intervention of the position change control code.

The scroll control code is a control code for scrolling the screen by defining a certain portion of the caption area. The scroll control code includes '2 to 5 line roll-up' and '2 to 5 line roll-down'.

/ `2 ~ 5 lines Roll-up: Control code for scrolling the contents of the window one line up in the window consisting of 2 ~ 5 lines upwards including the current character display position (cursor position) The top row of rows disappears with scrolling and the bottom row is replaced by the most recently decoded characters. When using this control code, there is no need for a separate APDR code, and all characters outside the specified window are erased from the screen.

/ `2 ~ 5 lines Roll-down: A control code for scrolling down one line of the window contents in a window consisting of 2 to 5 rows downward including the current character display position (cursor position) The bottom row of the inner rows disappears with scrolling and the top row is replaced with the most recently decoded characters. When using this control code, there is no need for a separate APUR (go to first character position) code, and all characters outside the specified window are supported on the screen.

The scroll function is not used for displaying additional information.

The position movement control code is a control code relating to the movement of the position at which the character is displayed.

/ `APF (Active Position Forward): When writing horizontally, it moves the writing character by one half width of Korean character (width of 1 alphabet) in the main progress direction (right). When writing vertically, it moves in the main proceeding direction (downward) by the Chinese character height.

/ `APB (Active Positionackward): When writing horizontally, write letters. Move in the opposite direction (left) by one half of Korean characters (width of one alphabet). When vertical writing is performed, it moves in the opposite direction of main progression (upper side) by the Chinese character height.

/ `APDR (Active Position Down Return): Moves to the leftmost character position (first column position) immediately below the current character display position in horizontal writing. At the time of vertical writing, the character is moved to the top character position (first row position) in the immediately left column of the current character display position. Move in the main direction (downward) by the Chinese character height.

/ `APUR (Active Position Up Return): Moves to the leftmost character position (first column position) immediately above the current character display position in horizontal writing. At the time of vertical writing, the character is moved to the top character position (first row position) in the immediately right column of the current character display position.

/ `3 ~ 6 characters APF: APF of 3 ~ 6 characters width is used for horizontal writing. When vertical writing is performed, the APF of 3 ~ 6 characters is executed.

Exceptions to position movement control are as follows. APDR, APB, 2 ~ 5 line roll-up, 2 ~ 5 line roll-down, etc. when characters are displayed up to the rightmost character position When a character code is received without an associated control code, the character is displayed by moving to the leftmost character position (first column position) of the line without changing the line. However, if the character code at this time is a space code, it should be ignored until it receives a character code that is not a space code. APDR, APB, 2 to 5 line roll-up, 2 to 5 line roll-down, etc. when characters are displayed up to the bottom character position (10th line position) When the character code is received without the character string, the character is displayed by moving to the position of the top character (first line position) of the column without changing the column. However, if the character code at this time is a space code, it should be ignored until it receives a character code that is not a space code.

The transmission of control codes according to the screen display method is as follows.

The transmission order of the control codes at the time of pop-on is as follows: Receive storage + (Other control code) + String + (Other control code) + + Clear screen + View screen + Receive storage + (Other control code) + String + ) + + Clears the screen + shows the screen +. In order for the receiver to properly view the character information currently being displayed in the pop-on manner, a proper delay time is required before the sender sends a screen clear control code.

(Control code) + string (other control code) + string + (2 to 5 lines roll-up) + screen display + (other control code) + string + (Other control codes) + string + (2 to 5 lines roll-up) +. 2 ~ 5 lines Roll-up Whenever control code is received, the outer area of the window should be cleared to transparent color.

(Control code) + string (other control code) + string + (2 to 5 lines roll-down) + display view + (other control code) + string + (Other control code) + string + (2 to 5 lines roll-down) +. Each time the roll-down control code is received, the outer area of the window must be cleared to transparent color.

The control code for additional information is as follows.

Since the additional information transmits the page unit code, the 'page start' and 'page end' control codes for page processing are required. 'Start page' interprets the '2-line roll-up' of the subtitles and 'End of page' interprets the 2-line roll-down of the subtitles as the corresponding code.

/ `Start page: Indicates the start of one page of additional information, and the receiver starts storing one page upon receipt of this code. If you do not receive this code at the beginning of the page, all data on this page will be ignored.

/ `End of page: Indicates the end of one page of additional information, and the receiver, upon receipt of this code, displays the data of the page already received on the screen.

When wrapping additional information, one of the codes APDR, APUR, and column positioning control code must be transmitted.

Before displaying one page of additional information data on the screen, it is necessary to erase the screen with the background color of the page to be displayed, so a background color of one page unit is required. The background color code immediately after the 'page start' code is set as the page background color. If the background color code does not come immediately after the 'page start' code, the background color of the previous page is set as the page background color.

The validation code is identified and processed as follows.

The procedure and process for decoding the subtitle signal at the receiver to determine the valid code follow the following sequence of numbers.

D7 and D16 must be the same to determine a valid code.

D17 and D0 1s D1 1s D2 1s D3 1s D4 1s D5 1s D6 1s D7 1s D8 1s D9 1s D10 1s D11 1s D12 1s D13 1s D14 1s D15 1s If D16 is the same,

D5 and D6 are respectively (0, 0) and D14 and D15 are respectively (0, 0), the control code is determined.

If D5 and D6 are (0,1) or (1,0) or (1,1) respectively and D14 and D15 are respectively (0,1) or (1,0) or (1,1) .

D5, D6, D14 and D15 are respectively (0, 0) and the other is (0,1) or (1,0) or (1,1), the control code and the character code are simultaneously received Since there is no case, this code judges as an error.

In case of discrimination by letter code in the previous number, D8 and D0 1s D1 1s D2 1s D3 1s D4 1s D5 1s D6 1s D7 are judged to be the same and judged to be different if they are different.

If it is judged not to be an error in the above, it is checked whether it is a character code defined in 1sKSC5601, and if it is an undefined code, '?' Or ''. If the code is defined, the corresponding character is displayed on the screen.

When it is judged as a control code in the above code, whether or not D0 and D1 1s D2 1s D3 1s D9 match and D4 and D1 1s D2 1s D11 1s D12 are checked in LSWord and it is judged as an error if at least one does not match .

If it is determined in the above step that it is not an error, it is determined whether or not it is defined in the control code table of FIG. 5, and if it is an undefined code, it is determined to be an error.

If the control code defined in the above table is the control code, the same LSWord and MSWord are waiting for repeated transmission.

When the same LSWord and MSWord are repeatedly transmitted, the control code is applied.

The above-described effective code discrimination and processing will represent the most preferable embodiment, and similarly, modification can be performed. For example, you can hear different combinations of parity of control codes, and so on. In particular, various schemes for preventing the error of the control code can be employed.

The operation and effect of the present invention described above will be described as follows.

First, when a drama is broadcasted by a broadcasting station having the system of FIG. 1, and a viewer's response to a drama transmitted at the same time is prepared, a questionnaire is prepared and transmitted as a caption signal. In the television receiver of FIG. 2, And decodes the subtitle signal to display a questionnaire on the screen. At this time, since the viewer can selectively display the questionnaire, a viewer who does not feel the need to respond to the questionnaire according to the viewer can only watch the drama without selecting the subtitle display. The viewer who wishes to respond to the questionnaire can select the subtitle display and respond to the questionnaire displayed at the bottom of the drama or display the additional information to display the additional information. In a broadcasting station, a drama currently being broadcasted in an open caption mode on a broadcast program can notify a viewer of a survey by subtitle guidance or icon display during a survey.

As shown in FIG. 8, the user reads the questionnaire displayed on the screen by the above-mentioned subtitle display selection, selects a desired number and dials the number, and when connected to the answering part of the broadcasting station, Press the button to enter the selected number. The inputted number is accepted to the automatic answering unit 80 of the broadcasting station through the telephone line, and the received survey survey data is transmitted to the survey processing unit 90. The survey processing unit 90 classifies the input data or processes it according to a given algorithm and generates the result as character and control information.

The character and control information corresponding to the survey result is generated as a caption signal, and the caption signal is superimposed on the video signal and transmitted. In the television receiving apparatus, the caption signal received by the viewer is decoded and the result of the survey processing is displayed on the screen. Therefore, the viewer can enjoy the drama and receive the result of the survey in real time. In the broadcasting station, it is possible to double the audience rating by the response rate of the questionnaire obtained in this way. Based on the surveyed ratings and survey results, it will be possible to reflect dramatic development of drama and story development in the future.

As described above, in the present invention, the viewer's broadcast participation consciousness is provided by the viewer's questionnaire survey of the broadcast through the viewer-selectable caption broadcasting separately from the broadcast, and it is possible to easily perform the survey at any time without any separate special survey program. . The viewer who does not feel the need to respond to the questionnaire by using the viewer-selective caption broadcasting does not have any influence on the enjoyment of the broadcast since the caption display is not selected.

Although the questionnaire has been described in the above-described embodiment, the present invention is not limited to this. For example, as shown in FIG. 9, the quiz subtitle is sent out to be displayed on the screen of the receiving apparatus, It is also possible to involve viewers of each family in a quiz pool given only to the audience.

Claims (2)

Transmitting a viewer questionnaire caption by inserting viewer selectable caption information into an arbitrary horizontal line which does not affect a broadcast signal for every field of a television signal in the middle of a broadcast program currently in progress; Displaying on a screen a questionnaire caption received at a television receiving apparatus that receives a viewer selectable caption broadcast according to a viewer's selection; Receiving, in the television station, a viewer's telephone response returned in response to a questionnaire caption display displayed on the television receiver; Processing the received telephone call response of the viewer and transmitting the processing result as viewer selectable caption information; And displaying the result of the processing received by the television receiving apparatus on a subtitle display. The interactive television broadcasting method according to claim 1, wherein the questionnaire caption includes a popularity, a story development of a drama, a quiz, and the like.