JP2009188462A - Closed caption display system and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closed caption display system which can check the display position of closed caption data toward a portable receiver for the display screen of a broadcast program in advance, and can check whether the closed caption data toward the portable receiver matches closed caption data toward a fixed receiver or not in advance. <P>SOLUTION: In a display controller 18, both the analysis result of one-segment closed caption data converted from HD closed caption data by a portable closed caption specification converter 14 and the analysis result of HD closed caption data are acquired and they are displayed simultaneously on the same display 17. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for displaying subtitles in accordance with video display, for example, in terrestrial digital broadcasting, and more particularly to a technique for realizing proper subtitle display on a mobile receiving terminal.

  In the terrestrial digital broadcasting, in order to enhance the visual effect and consider viewing of the visually impaired person, a function of displaying subtitles at a designated position on the screen in accordance with the video display of the program is incorporated.

  By the way, in terrestrial digital broadcasting, broadcasting for portable receivers (including on-vehicle receivers) is performed simultaneously with broadcasting for fixed receivers. In this case, it is necessary to consider that the display screen of the portable receiver is extremely small compared to the display screen of the fixed receiver. That is, for a fixed receiver, even if it is possible to display a caption on the display screen below a speaker person, if the caption is superimposed on a portable receiver, video display is hindered. Therefore, in the ARIB (Association of Radio Industries and Businesses) standard, a subtitle display area (out-screen) is provided separately from the video display area, and mobile subtitles that sequentially display each person's speech as a character string. Specifications are included.

  However, in the caption data created for the fixed receiver, the display position is designated by the coordinate information for each block of the character string, but such coordinate information is not added for the portable receiver. For this reason, for example, when individual subtitles for a plurality of speaker images are displayed on a fixed receiver, there are cases where the display order of character strings is mixed and a meaningless sentence is formed on a portable receiver.

On the broadcast station side, it is necessary to confirm in advance the position where the caption data for the portable receiver is superimposed on the video before on-air. Conventionally, a method has been proposed in which subtitle data created for a fixed receiver is displayed in a region where no video is displayed when down-converted to subtitle data for a portable receiver ( For example, Patent Document 1).
JP 2004-194131 A.

  However, the above method is applied to an information recording / reproducing apparatus such as a DVD (Digital Versatile Disc), and is not applied to a broadcasting station. For this reason, conventionally, there is a strong demand for a method capable of confirming whether subtitle data for a portable receiver is superimposed on an appropriate position of a video in conjunction with subtitle data for a fixed receiver in a broadcasting station.

  Accordingly, an object of the present invention is to confirm in advance the display position of caption data for a portable receiver on a broadcast program display screen, and whether the caption data for a portable receiver matches the caption data for a fixed receiver. It is an object of the present invention to provide a caption display system and a caption display method capable of confirming whether or not in advance.

  In order to achieve the above object, a subtitle display system according to the present invention is displayed at a designated position on a screen in accordance with video display and has subtitle data for a fixed receiver having a page structure and a subtitle for a portable receiver having a page structure. A subtitle display system for displaying data on a display, comprising: a portable subtitle specification conversion device that converts subtitle data for a fixed receiver into subtitle data for a portable receiver; and a subtitle data for a fixed receiver and a portable subtitle specification conversion device. A decoder that decodes the output subtitle data for portable receivers into a display format that can be displayed on the display, and analyzes the subtitle data for fixed receivers and subtitle data for portable receivers from the output of the decoder, and the results of these analyzes Display control device that displays the image on a display unit in units of pages, caption data for a fixed receiver displayed on the display control device, and mobile An input unit for instructing a page of subtitle data for the receiver, and the display control device displays the analysis results of the subtitle data for the fixed receiver and the subtitle data for the portable receiver of the page instructed by the input unit, respectively. It has a function of displaying on a display.

  According to this configuration, not only the analysis result of the subtitle data for the portable receiver converted from the subtitle data for the fixed receiver by the portable subtitle specification conversion device, but also the analysis result of the subtitle data for the fixed receiver is acquired and displayed in the same way. The display is made at the same time. Therefore, prior to on-air caption data for fixed receivers and caption data for portable receivers, the display position of caption data for portable receivers on the broadcast program display screen can be confirmed in advance with a single display and Whether or not the caption data for the receiver is linked to the caption data for the fixed receiver can be confirmed in advance with one display. Furthermore, the operation verification of the conversion program by the portable subtitle specification conversion apparatus can be performed with one display.

  The portable caption specification conversion device is characterized in that a conversion program for converting caption data for a fixed receiver into caption data for a portable receiver is converted into a DLL (Dynamic Link Library).

  According to this configuration, it is possible to immediately cope with the upgrade of the conversion program.

  When subtitle data for a portable receiver is specified by a parameter in a plurality of modes, the input unit has a function for instructing a parameter of subtitle data for a portable receiver to be displayed on the display control device. The display device has a function of displaying the analysis result of the caption data for the portable receiver in a mode in accordance with the parameter instruction from the input unit. In particular, when a plurality of modes are defined by parameters for the display area of subtitle data for portable receivers, character size, character color, and character string arrangement method, the display control device uses According to the instruction, the mode change of any one of the subtitle data display area for mobile receivers, the character size, the character color, and the character string arrangement method may be executed.

  For example, when the display screen is narrow, it is difficult to see if many captions for portable receivers are placed on the screen. Therefore, if the operator can select and display the subtitle data display area for mobile receivers, the character size, the character color, and the character string arrangement method, the display content is easy for the operator to see. You can check with.

  The display control apparatus displays the character codes of the caption data for the fixed receiver and the caption data for the portable receiver on the display in accordance with an instruction from the input unit.

  According to this configuration, it is possible to check not only the display position but also whether or not there is a character code configuration with one display.

  The display control apparatus is characterized in that the analysis result obtained by combining the caption data for the fixed receiver and the caption data for the portable receiver and the separate analysis results are selectively displayed according to an instruction from the input unit.

  According to this configuration, the analysis result obtained by combining the caption data for the fixed receiver and the caption data for the portable receiver and the separate analysis result can be selectively displayed by the operator's selection. You will be able to check the contents.

  As described above in detail, according to the present invention, the display position of the caption data for the portable receiver on the display screen of the broadcast program can be confirmed in advance, and the caption data for the portable receiver is the caption data for the fixed receiver. It is possible to provide a caption display system and a caption display method that can confirm in advance whether or not they match.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a caption display system according to an embodiment of the present invention. In FIG. 1, a program server 11 stores a program data file of an on-air broadcast program in advance, and responds to an on-air instruction signal given from an APC (automatic program transmission control device) 12 or an instruction signal from the operation terminal 13. The corresponding program data file is selectively reproduced. This reproduction data is supplied to the portable caption specification conversion device 14 and the decoder 15. This playback data is a program data file produced for a fixed receiver, and is video (character) data (hereinafter referred to as “character data”) for displaying subtitles superimposed on the display screen along with video data and audio data. HD subtitle data) is a multiplexed file.

  The portable subtitle specification conversion device 14 is suitable for the mobile subtitle display area of the portable receiver according to the mobile subtitle specification conversion program registered in advance and converted into a DLL (Dynamic Link Library). Is converted into display control information and multiplexed with video data and audio data to create a program data file for a portable receiver. The program data file is output to an on-air transmission device (not shown) and supplied to the decoder 16.

  The decoder 15 decodes the HD subtitle data in the input program data file into a video signal that can be displayed on the display 17 and outputs the video signal to the display control device 18. The decoder 16 extracts subtitle data (hereinafter referred to as one-segment subtitle data) from the input program data file, decodes the one-segment subtitle data into a video signal that can be displayed on the display 17, and outputs the video signal to the display control device 18.

  On the other hand, the display control device 18 analyzes the HD subtitle data and the one-segment subtitle data from the outputs of the decoders 15 and 16 according to the operation input instruction of the operation terminal 13 and displays these analysis results on the display 17 in units of pages.

  Here, the basic processing flow of the portable caption specification conversion program is based on portable caption conversion guidelines shown in the ARIB standard STD-B37. The main points of this guideline are as follows.

  First, in the portable receiver, as a model case, it is defined to secure a display area of standard size 12 characters × 4 lines or standard size 16 characters × 3 lines, and the number of characters that can be displayed at one time is 48 characters.

  The layout conversion processing to portable captions is based on a method of uniformly determining one sentence along the text flow from the upper left coordinates to the lower right coordinates. When there are a plurality of sentences on one caption screen, it is desirable to display them separately. As a method of judging a plurality of sentences, a method of judging character blocks (character strings constituting one context) of the same color adjacent in the character (horizontal) direction and line direction as a unit of one sentence, characters There is a method of judging character blocks of the same color that are adjacent only in the direction as a unit of one sentence.

  When there are a plurality of sentences on one subtitle screen, it is easy to see the display by using an action position line feed (APR) between sentences using an action position line feed between sentences. However, when the mobile subtitle is inserted into the operation position, even if it is 48 characters or less, it does not fit in the mobile subtitle display area. Also, when one sentence is composed of a plurality of lines, it may be determined as a plurality of sentences depending on the sentence determination method, and may not fit in the display area by inserting a line feed at the operation position. In such a case, the operation position line feed can be deleted or replaced with another symbol such as a space.

In the above configuration, the processing operation of the display control device 18 will be described below.
FIG. 2 is a flowchart showing a control processing procedure of the display control device 18.

  First, the display control device 18 determines a preview instruction input from the operation terminal 13 (step ST2a), and when there is an instruction input, inputs a program data file output from each of the decoders 15 and 16 (step ST2a). ST2b) It is determined whether simple subtitle display is designated or character code display is designated (step ST2c).

  Here, when the simple subtitle display is designated (Yes), the display control device 18 supplies the data analysis results of the HD subtitle data and the one-segment subtitle data to the display 17 for display as shown in FIG. Step ST2d). Therefore, this display allows the operator to check the operation verification of the portable subtitle specification conversion program and the conversion result in the one-segment subtitle display.

  In this state, it is assumed that the operator inputs a change instruction on the operation terminal 13 in order to change the display mode by changing the page designation for simple caption display or changing the parameter designation. If it does so, the display control apparatus 18 will transfer to step ST2f from step ST2e, and will perform a display change process here.

This display change process is performed as follows.
Rename page
Change the display area of 1Seg subtitle data by parameter selection
Changing the character size of 1Seg subtitle data by parameter selection specification
Changing the text color of 1Seg subtitle data by parameter selection specification
How to arrange the character string of 1Seg subtitle data by parameter selection specification
Switching between analysis results of HD subtitle data and one-seg subtitle data combined with separate analysis results using the HD subtitle data selection button or one-segment subtitle display switching button
On the other hand, when the character code display is designated in step ST2c (No), the display control device 18 supplies the character codes of the HD subtitle data and the one-segment subtitle data to the display 17 as shown in FIG. It is displayed (step ST2g). Therefore, this display allows the operator to check on the display 17 whether or not the character code is configured.

  The display 17 also displays the processing time and operation error by the portable caption specification conversion device 14 (lower left of the screen in FIG. 3).

  As described above, in the above-described embodiment, the display control device 18 acquires not only the analysis result of the one-segment subtitle data converted from the HD subtitle data by the portable subtitle specification conversion device 14, but also the analysis result of the HD subtitle data. Simultaneously displaying on the display 17.

  Accordingly, prior to the on-air display of the HD subtitle data and the one-segment subtitle data, the display position of the one-segment subtitle data with respect to the on-air program display screen can be confirmed in advance on one display 17 and the one-segment subtitle data is linked to the HD subtitle data. It can be confirmed on one display 17 in advance. Furthermore, the operation verification of the conversion program by the portable caption specification conversion device 14 can also be performed on one display 17.

  Moreover, in the said embodiment, the portable subtitle specification conversion program registered into the portable subtitle specification conversion apparatus 14 is made into DLL (Dynamic Link Library), and can respond immediately to the upgrade of a conversion program.

  Furthermore, in the above-described embodiment, the operator can select and display the one-segment subtitle data display area, the character size, the character color, and the character string arrangement method by the operator's change parameter selection. Makes it possible to check the analysis result of the one-segment subtitle data on the display 17 with easy-to-read display contents.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

1 is a block diagram showing a configuration of a caption display system according to an embodiment of the present invention. 6 is a flowchart showing a control processing procedure of the display control apparatus in the embodiment. The figure which shows the simple caption display screen in the embodiment. The figure which shows the character code display screen in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Program server, 12 ... APC, 13 ... Operation terminal, 14 ... Portable subtitle specification conversion apparatus, 15, 16 ... Decoder, 17 ... Display, 18 ... Display control apparatus.

Claims (7)

A subtitle display system that displays subtitle data for a fixed receiver having a page structure and a subtitle data for a portable receiver having a page structure on a display device, which is displayed at a designated position on the screen according to video display,
A portable caption specification conversion device for converting the caption data for the fixed receiver into the caption data for the portable receiver;
A decoder that decodes the caption data for the fixed receiver and the caption data for the portable receiver output from the portable caption specification conversion device into a display format that can be displayed on the display;
A display control device that analyzes the caption data for the fixed receiver and the caption data for the portable receiver from the output of the decoder, and displays these analysis results on the display unit in units of pages;
An input unit for instructing a page of the caption data for the fixed receiver and the caption data for the portable receiver to be displayed on the display control device;
The display control device has a function of causing the display to display analysis results of the caption data for the fixed receiver and the caption data for the portable receiver of the page specified by the input unit. Display system. 2. The caption according to claim 1, wherein the portable caption specification conversion device converts the conversion program for converting the caption data for the fixed receiver into the caption data for the portable receiver into a DLL (Dynamic Link Library). Display system. When the subtitle data for portable receivers defines a plurality of modes by parameters,
The input unit has a function for instructing a parameter of caption data for the portable receiver to be displayed on the display control device;
2. The caption according to claim 1, wherein the display control device has a function of causing the display to display an analysis result of the caption data for the portable receiver in a mode according to an instruction of a parameter from the input unit. Display system. 2. The display control apparatus according to claim 1, wherein the display controller displays character codes of the caption data for the fixed receiver and the caption data for the portable receiver according to an instruction from the input unit. Subtitle display system. When a plurality of modes are defined by the parameters for the display area, the character size, the character color, and the character string arrangement method for the caption data for the portable receiver, the display control device may 4. The subtitle display system according to claim 3, wherein a mode change of any one of a display area of subtitle data for the portable receiver, a character size, a character color, and a character string arrangement method is executed according to an instruction. . The display control apparatus selectively displays an analysis result obtained by combining the caption data for the fixed receiver and the caption data for the portable receiver and a separate analysis result according to an instruction from the input unit. The subtitle display system according to claim 1. A subtitle display method for displaying subtitle data for a fixed receiver with a page structure and subtitle data for a portable receiver with a page structure on a display device, which is displayed at a designated position on the screen according to the video display,
Convert caption data for fixed receivers into caption data for portable receivers,
Decode the converted caption data for portable receivers and caption data for fixed receivers into a display format that can be displayed on the display,
A subtitle display method, wherein the subtitle data for the fixed receiver and the subtitle data for the portable receiver are analyzed from the decoded output, and the analysis results are displayed on the display unit in units of pages.

Images