KR100365658B1 - Broadcasting System Using Means of Wireless Communication on Train and Method thereof - Google Patents

Abstract

The present invention relates to a train broadcasting control system and a method using a wireless terminal capable of automatically transmitting a moving picture and text from a train to provide information service for a passenger, the moving picture data storing unit storing a moving picture file; A video player for playing and outputting the video file output from the video data storage unit; A caption generating unit for converting input character data into caption data and outputting the caption data; A subtitle converter for converting subtitle data output from the subtitle generator into an overlay signal and outputting the overlay signal; A mixer for mixing the video output from the video reproducing unit and the subtitles output from the subtitle converting unit to output a video signal; A divider for distributing and outputting a video signal output from the mixer to a plurality of monitors; A pager receiver for wirelessly receiving and outputting caption data and control signals necessary for controlling the video reproducing unit and the caption generating unit; A control unit for controlling operations of the video reproducing unit and the subtitle generating unit by using the control signal and the subtitle data received through the pager receiving unit, and selecting and outputting the subtitle data; And a script file storage unit for storing the subtitle data output from the controller and outputting the subtitle data to the subtitle generator.

Description

Train broadcasting control system using wireless terminal and its method {Broadcasting System Using Means of Wireless Communication on Train and Method

The present invention relates to a train broadcasting control system using a wireless terminal and a method thereof, and more particularly, to wirelessly transmit multimedia data and text data in a transportation means such as a train to perform a service for providing information to a passenger. A train broadcast control system using a terminal and a method thereof are provided.

In general, the conventional broadcasting system is composed of a driver control method of reproducing each driver by the broadcast schedule itself, and the control method itself is simply mounted inside the driver as a control method by a playback time and a control method by a corresponding track. When all the stored contents of the videotape or disc are played, there is a replay time to return the tape or disc to the beginning. Due to the limitation of the storage capacity, various video techniques and expression methods have been limited in the broadcast presentation method. .

In addition, a system stoppage occurs due to a failure of the drive unit connected to the controller, and a deterioration in image quality due to a long time use of the video tape inserted in the drive unit occurs.

Most importantly, in order to change the entire broadcasting schedule, the videotape and disk inside the driver must be replaced, and the schedule must be newly adjusted.

Moreover, no broadcasting system has been installed in moving objects such as trains and subways.

Accordingly, the present invention has been made in view of the problems of the prior art, the object of which is to allow a number of passengers to watch the video and text messages on a moving object such as a train that can provide information service for passengers A train broadcast control system using a wireless terminal and a method thereof are provided.

1 is a block diagram for explaining the configuration of a train broadcasting control system using a wireless terminal according to the present invention;

2 is a flowchart illustrating a train broadcasting method using a wireless terminal according to the present invention.

Explanation of symbols on the main parts of the drawings

10 control unit 12 pager

14: MPEG file storage unit 16: MPEG playback unit

18: script file storage unit 20: subtitle generator

22: Subtitle Board 24: Mixer

26: divider 28a-28d: monitor

In order to achieve the above object, a train broadcast control system for performing a train broadcast using a plurality of monitors installed in a train, the train broadcast control system, multimedia data storage unit for storing the multimedia data; A multimedia data player for reproducing and outputting the multimedia data output from the multimedia data storage unit; A caption generating unit for converting input character data into caption data and outputting the caption data; A subtitle converter for converting subtitle data output from the subtitle generator into an overlay signal and outputting the overlay signal; A mixer for mixing the video signal output from the multimedia data reproducing unit and the subtitle signal output from the subtitle converter and converting the digital signal into digital data; A divider for distributing and outputting a video signal output from the mixer to a plurality of monitors; A wireless terminal for wirelessly receiving subtitle data output through the subtitle generator, control signals necessary for controlling the multimedia data reproducing unit and the subtitle generating unit, and multimedia data stored in the multimedia data storage unit; A control unit which receives a control signal, subtitle data and multimedia data through the wireless terminal to control operations of the multimedia data reproducing unit and the subtitle generating unit, and stores the received multimedia data in the multimedia data storage unit; Provides a train broadcasting control system using a wireless terminal, characterized in that the script file storage unit for receiving the subtitle data output from the control unit and outputs the subtitle data to the subtitle generator.

In addition, the present invention, in order to achieve the above object, the passengers through a plurality of monitors installed in the train by wirelessly receiving a text message and the second multimedia data via a plurality of first multimedia data or a wireless terminal previously stored in the medium A train broadcasting control method using a wireless terminal capable of providing various types of information to a user, the method comprising: setting a broadcasting schedule for broadcasting the first multimedia data; Receiving, via the wireless terminal, a control signal for controlling broadcast on the first multimedia data according to the broadcast schedule, text message data for caption transmission, and data of the second multimedia data; Through the plurality of monitors until an end signal for notifying the end of the broadcast of at least one kind of data among subtitles and first and second multimedia data is received through the wireless terminal using the control signal received through the wireless terminal. Provides a train broadcast control method using a wireless terminal, characterized in that the step of broadcasting.

As described above, in the present invention, a plurality of monitors may be installed in a means of transportation used by a plurality of passengers, such as trains and subways, and the service may be provided to the passengers by broadcasting videos and text messages. will be.

(Example)

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention described above in more detail.

1 is a block diagram illustrating a configuration of a train broadcasting control system using a wireless terminal according to the present invention, and FIG. 2 is a flowchart illustrating a train broadcasting method using a wireless terminal according to the present invention.

In a train broadcasting control system using a wireless terminal according to the present invention, a pager, a mobile phone (cellular or PCS phone), a wireless LAN terminal, or the like can be used as a communication means. It explained.

The present invention uses a pager, a pager, to provide passengers with a text message in real time (actually, there is a slight delay in the time required to collect specific information, edit it into text data, and page it). Since the pager can transmit and receive a control code for playing a video, the user can remotely select one of a plurality of pre-stored video files and broadcast it at a desired time.

The present invention having the above characteristics is configured as follows.

The pager 12 is used as a means for transmitting and receiving a text message and a control code for playing a video by interworking with a wireless paging system, and a series of data transmitted through the pager 12 is controlled by a separate control center ( It is set in (not shown in the figure) to be received by a specific pager through a telecommunication company operating a wireless calling system.

Therefore, the data received through the pager 12 is usually 200 bytes or less in consideration of the received data capacity of the pager, and the type of the received data includes text data used as subtitle data and a method of displaying the text data. Control codes for controlling, and control codes for selecting and reproducing moving picture data.

The MPEG playback section 16 for playing back a video file selects and plays back a video file stored in the MPEG file storage section 14 in which a video file (MPEG standard) is stored. The output signal type is an analog signal. .

The video file stored in the MPEG file storage unit 14 stores a file preselected by an administrator, and a hard disk drive (HDD) is an ideal medium, but an optical recording medium capable of random access. You can also use media such as CDs or DVDs.

On the other hand, the data (character, control code) received through the pager 12 is input to the control unit 10 to determine whether the character data or control code, in the case of the character data converted to a separate script file script file It stores in the storage 18.

The text data stored in the script file storage unit 18 is inputted to the subtitle generation unit 20 which is converted into subtitle data for output as subtitles for display on the monitors 28a to 28d and then converted to the subtitle board 22. do.

The caption board 22 converts the caption data converted into caption data by the caption generation unit 20 into an analog signal form and outputs the caption data.

The analog video signal output from the MPEG playback unit 16 and the subtitle signal output from the subtitle board 22 are input to the mixer 24, which is a kind of overlay board, are synthesized with each other, and then digital signals again. Is converted to output.

The moving picture and subtitle signals output from the mixer 24 are divided into a plurality of outputs through the divider 26 and inputted to the respective monitors 28a to 28d for display.

Here, the control unit 10 is implemented by a processor of a computer for implementing the present system, the subtitle generation unit 20 is a means implemented in software, the script file storage unit 18 is the subtitle generation unit It is a storage unit formed in the same folder as the program for implementing (20).

The operation of the present invention having the above configuration will be described together with a train broadcasting method using a pager which is another invention of the present invention.

The manager must set a broadcast schedule in advance in order to transmit a broadcast through the present invention installed in the train (S 10), and selects and stores the video file to be broadcasted according to the set broadcast schedule in the MPEG file storage unit 14 ( S 12).

At this time, if the administrator is familiar with the file information on the playback time and the screen size, etc. in the video files stored in the MPEG file storage unit 14, the file control is smooth.

Subsequently, data necessary for processing playback control and text data for the moving image file stored in the MPEG file storage unit 14 and subtitles are transmitted and received (S 14 and 16).

Here, since the data transmission of the pager system is one-way, in some cases, data may not be received. Therefore, it is necessary to retransmit and transmit the same data at least two times at regular time intervals.

It is checked whether the received data has a control code indicating the end of the broadcast (S 18). If the broadcast is terminated, the broadcast is terminated.

Here, the data received through the pager is largely divided into text data and a control signal.

Normally, pager data is transmitted and received with a length of about 200 bytes, the pager data format used in the present invention is shown in Table 1 below.

Information item BCC Real data 4 bytes 2 bytes Data length

That is, the format of the data received through the pager consists of information code (4 bytes) + BCC (2 bytes) + real data.

The BCC code is a value obtained by adding AND 0x7F7F and OR 0x2020 after adding each byte of real data to an unsigned short type variable.

The information code is a control code for controlling data to be followed by real data. The control code defines a property of real data as a character data (subtitle data) or a file name of a video file for controlling a video file, a playing time, or the like. The above characteristics are summarized in a table as shown in Table 2 below.

In other words, the data provided in the real data includes text data and data having non-control factor attributes such as a video file name and a playing time, and the information code controls to define and control the properties of subsequent accompanying text data. Data with argument attributes.

Information code Real data Remarks 0500-0599 Character data Control subtitle display method according to character data and information code for subtitle display 0400 Character data Determine whether to continuously receive text data 0300 Video file name, duration Name of video file to play, duration 0200 An end comment End broadcast, broadcast announcement

(However, the information code may be set to a different value in some cases, and the property of the real data may be set differently accordingly.)

In the above Table 2, when the information code is in the range of 0500 to 0999, the content of subsequent real data is defined as character data, and various methods of converting and displaying caption data according to the type of information code can be converted.

For example, the font determination of the caption, scrolling speed, display time, number of repetitions, and the like can be controlled through the information code.

When the information code is 0400, it is used when the content of the real data is character data and the character data included in the preceding character data and one script file includes one transmission / reception range, that is, a character string of 200 bytes or more. If the information code is 0400, it means that the character data is connected to the preceding character data.

The text data received as the real data is input to the subtitle generator 20 through a script file (a file stored in the script file storage unit) and processed as subtitle data.

The actual contents of the script file will be described in detail by receiving text data and caption processing.

[Example of script file]

0, "d: \ bcg32motion \ bcg_data \ desktop \ 4culture.BMP", 2,0

0,1,0,1,1,0,0,0

0,0,30,70,0, \ F (emboss) \ S (36) \ C (B, 255,255,255,0) \ C (O, 0,0,0,0) \ R (85) \ T ( 2) \ O (4,0) [movie]

0,0,30,130,0, \ F (emboss) \ S (36) \ C (B, 255,255,255,0) \ C (O, 0,0,0,0) \ R (85) \ T (2) \ O (4,0) Mellow Films

0,0,30,190,0, \ F (emboss) \ S (36) \ C (B, 255,255,255,0) \ C (O, 0,0,0,0) \ R (85) \ T (2) \ O (4,0) 'Hwayanghwa' background music

0,0,30,250,0, \ F (embossment) \ S (36) \ C (B, 255,255,255,0) \ C (O, 0,0,0,0) \ R (85) \ T (2) \ O (4,0) 4 related records

0,0,30,310,0, \ F (emboss) \ S (36) \ C (B, 255,255,255,0) \ C (O, 0,0,0,0) \ R (85) \ T (2) \ O (4,0) in response to simultaneous release

0,0,30,370,0, \ F (embossment) \ S (36) \ C (B, 255,255,255,0) \ C (O, 0,0,0,0) \ R (85) \ T (2) \ O (4,0) Hot Popularity

0,0,30,430,0, \ F (emboss) \ S (36) \ C (B, 255,255,255,0) \ C (O, 0,0,0,0) \ R (85) \ T (2) \ O (4,0)

On the other hand, when the character data as described above is received, the control for displaying it on the monitor, that is, the control between the control unit 10 and the subtitle generation unit 20 is performed as follows.

In the transmission / reception flow, a command is always transmitted from the control unit 10, and the subtitle generation unit 20 processes a job or transmits a current state in response thereto.

Every command consists of 4 bytes, each byte being defined as follows.

First byte: control code

2nd byte: parameter 0

3rd byte: Parameter 1

Fourth byte: check-sum of the previous three bytes

The format of the response from the caption generating section is 4 bytes, and is defined as follows.

First byte: The most significant bit is set in the control code of the received command (for example, 90h if the control code is 10h).

Second byte: Status 0

3rd byte: Status 1

Fourth byte: check-sum of the previous three bytes

The control code is composed of the following types.

1. Command to get status (each response is different)

10h get current status

Parameter 0: 0

Parameter 1: 0

answer :

Status 0: Transmission progress status

00h: In effect wait

01h: Out effect wait

02h: In effect in progress

03h: Out effect in progress

04h: Preparing page

10h: Pause scroll

80h: No waiting page (when all page delivery is finished).

Status 1: flags

00000001b: Creating page by script

11h: get the total number of pages

Parameter 0: 0

Parameter 1: 0

answer :

Status 0: Low byte of total number of pages

Status 1: high byte of total number of pages

12h: Get the page number currently waiting to be sent.

Parameter 0: 0

Parameter 1: 0

answer :

Status 0: Low byte of waiting page number

Status 1: high byte of waiting page number

2. Control command

20h: Select page to wait for transmission

Parameter 0: Low order byte of page number to be sent

Parameter 1: High byte of page number to wait for transmission

21h: waiting for next page

Parameter 0: 0

Parameter 1: 0

22h: waiting for previous page

Parameter 0: 0

Parameter 1: 0

23h: start sending

Parameter 0: 0

Parameter 1: 0

30h: scroll speed increase

Parameter 0: 0

Parameter 1: 0

31h: scroll down

Parameter 0: 0

Parameter 1: 0

32h: Pause / progress scroll

Parameter 0: 0

Parameter 1: 0

33h: scroll interrupt

Parameter 0: 0

Parameter 1: 0

40h: Clear the program screen (only available when not sending)

Parameter 0: 0

Parameter 1: 0

50h: Creating a page by script file

Parameter 0: Low byte of page number to create

Parameter 1: high byte of page number to create

Before using the commands, the "SCRIPT.TXT" file should be created in the directory in which the program for implementing the subtitle generator 20 is installed.

And, in response to the control command,

When received normally ...

Status 0: 0

Status1: 0

When an Error Occurs During Reception ...

80h (this code always in case of error)

Status 0: ffh

Status1: ffh

The format of the script file (script.txt) is as follows. The file name is “SCRIPT.TXT” and should be located in the directory where the subtitle generator 20 program is located, and has the following rules.

1. Describe the contents of one page.

2. Use only character codes that can be edited using a normal text editor.

3. Technical contents for each line

First line: page_mode, "background_filename", background_mode, background_alpha

Second line: in_effect_id, in_effect_speed, in_time, out_effect_id, out_effect_speed, out_time, repeat_count, repeat_interval

The two lines above are information about the page. Each item is displayed as decimal number, and each item is separated by ','.

Description of each item (the right side of the item name indicates the range) is as follows.

page_mode (0 ~ 2): Page type.

0: cut page

1: roll page

2: crawl page

background_filename: File path and name to use as background (this must be enclosed in quotation marks (""))

Example: "C: \ BCG32Motion \ Background \ Background.bmp"

background_mode: Screen layout method.

0: centered

1: placed in the form of tiles

2: fit to screen size

background_alpha: Background transparency (0 to 255), where 0 is completely opaque.

[in / out] _effect_id (no range): Unique number of the effect.

[in / out] _effect_speed (1 to 10): The speed at which the effect progresses.

[in / out] _effect_time (out of range): Delay time after effect (in milliseconds)

repeat_count (0 to 9999): Roll / crawl repeat count (only applicable for roll / crawl pages).

repeat_interval (no range): The delay between each repeat send (in milliseconds, only for roll / crawl pages).

The third and subsequent lines describe the contents and properties of each text object. One object per line is described below.

text_dir, align_mode, anchor_x, anchor_y, text_rotate, after which the content of the text.

Each item is expressed in decimal, and each item is separated by ',', and the description of each item (the right side of the item name indicates a range) is as follows.

text_dir (0 ~ 1): text direction

0: write horizontally

1: vertical writing

align_mode (0 to 4): Alignment method

0: left justified

1: right justified

2: center aligned

anchor_x (0 to 719): x coordinate of the anchor point of the text

anchor_y (0-479): y coordinate of the anchor point of the text

The anchor point depends on the text direction and alignment.

Example: If horizontally aligned, anchor_x is the center point of the text and anchor_y is the base_line of the text.

If right-aligned in vertical writing, anchor_x is the base_line of the text and anchor_y is the bottom end of the text.

text_rotate (0 to 359): Rotate angle of the text.

Text is the standard KS code string used by Windows.

Attributes of characters are specified using the '\' code in the string.

Once changed, the property will continue to apply to subsequent characters (also applies to other line objects).

Description of character attribute designation code.

\\: \ When displaying the character itself.

\ N: new line To next line within same object ...

\ F (facename): specify font

Example: \ F (rolling)-> Specify roll

\ S (size): Font size (4 to 400)

Example: Specifying \ S (32)-> 32 point size

\ R (ratio): Jangpyeong (50 ~ 500)

Example: \ R (200)-> 200% longevity

\ T (interval): Letter spacing (dot unit)

\ Ix: italic designation

\ I0: Normal font

\ I1: Italic

\ Mx: Mix mode

\ M0: Opaque

\ M1: Transparent

\ C (p, r, g, b, a): specify color

p: part to specify

B: character body

S: shadow

O: Border

r, g, b, a (0 ~ 255): Specify color value of red, green, blue, alpha

Example: \ C (B, 128, 128, 128, 0)

\ W (x, y, m, f): Specify shadow properties

x: Shadow position x (dot unit, relative coordinate with body)

y: shadow position y (dot unit, relative coordinate with the body)

m: shadow method

0: falling

1: attraction

2: soften

f: (1 ~ 10) soften level (applied when m = soften)

E.g. \ W (2, 2, 0)

\ W (4, 4, 2, 1)

\ O (w, g, f): Specify border attributes

w: border thickness

g: (0 ~ 1) glow on / off

f: (1 to 10) degree of glow. (applies when g = 1)

E.g. \ O (2, 0)

\ O (2, 1, 5)

Text line example.

0,2,200,400,0, \ F (desktop) \ S (28) \ R (100) \ T (0) \ I0 \ M0 \ C (B, 255,0,0,0) \ C (O, 0,255,255, 0) \ O (2,0) \ W (0,0,0) Hello \ F (bow).

In the above embodiment, the processing of the text data has been described as an example. However, if the received control code starts with 0300, it is a control code for playing a video. The time can be set.

In particular, it is possible to remotely select any one of a plurality of video files to be played at a desired time, so that you can broadcast a movie, animation, etc., in the middle of the time to accurately send a promotional video, advertising video, etc. It is.

Of course, it is also possible to broadcast through a still image (still image) while broadcasting a video as described above.

In addition, there may be a situation in which the broadcast should be stopped according to the broadcast condition. When the control code is 0200, the current broadcast is stopped, the end guide message is broadcast, and the broadcast system is down.

Meanwhile, as described in the above description, since the present system is a system through a pager system, the same content is retransmitted and transmitted at least twice in relation to the data transfer reliability of the pager system. It is necessary to check whether the data is identical to or different from the received data to distinguish the data before and after.

According to the present invention made as described above, a plurality of monitors are installed in a means of transportation, such as a train or a subway, using a pager system, thereby providing video and text information, and particularly in the case of text data, real-time information. Because it can provide information such as breaking news can be provided.

In addition, since it is possible to remotely select any one of a plurality of video files and play it at a desired time, it is possible to broadcast a movie, municipal publicity, advertisement, etc., thereby improving the quality of information providing service to citizens. It can be.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and the general knowledge in the technical field to which the present invention pertains without departing from the spirit of the present invention. Various changes and modifications will be made by those who possess.

Claims (13)

In the train broadcast control system for performing a train broadcast using a plurality of monitors installed in the train, A video multimedia data storage unit for storing multimedia data; A multimedia data player for reproducing and outputting the multimedia data output from the multimedia data storage unit; A caption generating unit for converting input character data into caption data and outputting the caption data; A subtitle converter for converting subtitle data output from the subtitle generator into an overlay signal and outputting the overlay signal; A mixer for mixing the video signal output from the multimedia data reproducing unit and the subtitle signal output from the subtitle converter and converting the digital signal into digital data; A divider for distributing and outputting a video signal output from the mixer to a plurality of monitors; A wireless terminal for wirelessly receiving subtitle data output through the subtitle generator, control signals necessary for controlling the multimedia data reproducing unit and the subtitle generating unit, and multimedia data stored in the multimedia data storage unit; A control unit which receives a control signal, subtitle data and multimedia data through the wireless terminal to control operations of the multimedia data reproducing unit and the subtitle generating unit, and stores the received multimedia data in the multimedia data storage unit; And a script file storage unit configured to receive subtitle data output from the controller and output the subtitle data to the subtitle generator. The system of claim 1, wherein the multimedia data storage unit is any one of an optical recording medium and a hard disk drive capable of random access control. The train broadcasting control system according to claim 1, wherein the multimedia data reproducing unit is an MPEG reproducing apparatus for reproducing multimedia data of MPEG standard. 4. The train broadcasting control using a wireless terminal according to claim 3, wherein the MPEG reproducing apparatus reproduces using any one of an MPEG reproducing program that reproduces MPEG files in software and an MPEG reproducing board that reproduces in hardware. system. The system of claim 1, wherein the wireless terminal is one of a pager, a mobile telephone, and a wireless LAN terminal. A train using a wireless terminal capable of wirelessly receiving text messages and second multimedia data through a plurality of first multimedia data or a wireless terminal previously stored in a medium and providing various information to passengers through a plurality of monitors installed in the train. In the broadcast control method, Setting a broadcast schedule for broadcasting the first multimedia data; Receiving, via the wireless terminal, a control signal for controlling broadcast on the first multimedia data according to the broadcast schedule, text message data for caption transmission, and data of the second multimedia data; Through the plurality of monitors until an end signal for notifying the end of the broadcast of at least one kind of data among subtitles and first and second multimedia data is received through the wireless terminal using the control signal received through the wireless terminal. Train broadcasting control method using a wireless terminal, characterized in that comprising the step of broadcasting. The method of claim 6, wherein in the data receiving step using the wireless terminal, reliability of the received data is improved by re-receiving the same data at least twice. 7. The data format according to claim 6, wherein the data format in the case of receiving the data reception using the pager in the data reception step using the wireless terminal is a 4-byte control code, and an 2-byte error check code for checking an error of subsequent data. And the remaining bytes are composed of text data. 10. The method as claimed in claim 8, wherein the control code comprises three bytes representing a control attribute and one byte for error checking for the three bytes. The method of claim 8, wherein the text data is any one of subtitle data used as subtitles and data for reproduction control for reproducing multimedia data. 11. The method of claim 10, wherein the caption data includes a character for displaying a caption and information on a font type, a size, a scroll presence, and a line feed attribute for controlling the display method of the character. Train broadcasting control method using a terminal. 12. The method as claimed in claim 10, wherein the reproduction control data for reproducing the multimedia data comprises a multimedia data file name to be reproduced and a reproduction time. The method of claim 8, wherein the control code is any one of subtitle data continuous to preceding data, control information required for multimedia data reproduction, and control information for terminating a broadcast.