JP2011130195A - Digital television - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine whether there is data of a subtitle or not in a broadcast truly. <P>SOLUTION: A digital television which receives transport streams as broadcast data, separates and processes images, sounds, and various data. The digital television acquires a subtitle packet for every program based on the broadcast data, determines the existence of subtitle data (a subtitle data existence determination module) in steps 11-14, memorizes the determination result of the existence of the subtitle data for every program (determination result memory module) in steps 15-17, determines whether there is subtitle data in a present program or not based on the memorized result when acquiring subtitle operation input from a user (subtitle operation input mean) in a step 22, and then controls the propriety of subtitle selection according to the existence of the subtitle data (subtitle selection control module) in steps 23-26. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a digital television that receives a transport stream that is broadcast data and separates and processes video, audio, and various data, and in particular, as additional information in a receiver circuit that is a detail of the television system. The present invention relates to a digital TV that displays subtitles.

The following are known for displaying subtitles on television and the like.
Patent Document 1 discloses a subtitle providing method in which all pages including subtitle information in different languages are listed in one or more tables called an initial subtitle table (IST).
Patent Document 2 discloses a configuration of a DVD-integrated television that can automatically display only subtitles based on subtitle information without a user setting.

  Patent Document 3 discloses a method for displaying an element of interactive content on a screen intended to display data transmitted in a digital television format having a subtitle using a command interface having a plurality of inputs. ing.

JP-A-8-191433 Utility Model Registration No. 3101737 JP 2005-538598 A

Currently, in a digital television, when a viewer views a television or a DVD, a function of displaying a subtitle called a subtitle can be used.
In the case of digital television broadcasting in Europe, the presence or number of subtitle data is fixed for each channel (broadcasting station) and is fixed, but whether the contents of the same channel are being sent Is different for each program.
In other words, it is assumed that a subtitle language is selected by using a subtitle on / off function usually mounted on a television or the like. As described above, since there is no difference in the number of subtitles and languages that can be selected for the same channel, the same number of subtitles can be selected even if the programs are different. However, in practice, a subtitle is displayed in a certain program, and a subtitle is not displayed in a certain program. That is, the user does not know whether the program has actual subtitle data.

  The present invention determines whether there is really subtitle data in the broadcast.

  The present invention is a digital television that receives a transport stream that is broadcast data and separates and processes video, audio, and various data, acquires a subtitle packet for each program based on the broadcast data, Subtitle data presence / absence judging means for judging the presence / absence of subtitle data, discrimination result storage means for storing the judgment result of the presence / absence of subtitle data for each program, subtitle operation input means for obtaining subtitle operation input from the user, and from the user Subtitle selection control means for determining whether or not there is subtitle data in the current program based on the storage result and controlling whether or not subtitle selection is possible depending on the presence or absence of subtitle data It is set as the structure which comprises.

  This digital television receives a transport stream that is broadcast data, and processes video, audio, and various data separately. Then, the subtitle data presence / absence judging means acquires the subtitle packet for each program based on the broadcast data and judges the presence / absence of the subtitle data. Remember every time. On the other hand, when the subtitle operation input from the user is acquired by the subtitle operation input means, the subtitle selection control means determines whether or not there is subtitle data in the current program based on the storage result, and according to the presence or absence of the subtitle data. To control whether subtitles can be selected.

That is, since the presence or absence of caption data is determined from the actual broadcast data and stored for each program, the caption data is not supplied by the program even if the caption data can be selected as the channel. For things, it becomes possible not to select subtitles.
The subtitle data presence / absence determining means acquires a program map table from the transport stream, acquires a subtitle packet ID from the program map table, and is attached with the packet ID acquired from the transport stream. It is also possible to obtain a closed caption packet and determine whether or not caption data exists based on whether or not the closed caption packet is empty.

In order to actually obtain the caption data, the program map table is obtained from the transport stream, the packet ID of the caption is obtained from the program map table, and the packet ID obtained from the transport stream is attached. Get subtitle packet. In addition, the presence / absence of caption data can be determined based on whether or not the acquired caption packet is empty.
Further, the determination result storage means acquires an event information table from the transport stream, acquires a service ID of a program being broadcast based on the time and channel from the event information table, and associates the service ID with the service ID. The presence / absence of caption data may be stored.

On the other hand, in order to identify each program, an event information table is acquired from the transport stream, and the service ID of the program being broadcast is acquired from the event information table based on the time and channel. In addition, by storing the presence / absence of caption data in association with the acquired service ID, the presence / absence of caption data can be accurately identified later for each program.
Further, the subtitle selection control means acquires an event information table from the transport stream when a subtitle operation input from the user is acquired, and from the event information table, the program being broadcast based on the time and channel is acquired. The service ID may be acquired, the presence / absence of subtitle data stored in association with the service ID may be read from the determination result storage unit, and the selection of subtitles may be controlled according to the presence / absence of subtitle data. good.

  When the subtitle operation input from the user is acquired, the event information table is acquired from the transport stream to accurately identify the program being viewed, and the event information table is being broadcast based on the time and channel from the event information table. Get the service ID of the program. Then, the presence / absence of caption data stored in association with the service ID is read from the determination result storage means. If there is subtitle data, subtitle selection may be enabled, and if there is no subtitle data, subtitle selection may be disabled.

  In addition, it is a digital television that generally receives a transport stream that is broadcast data and separates and processes video, audio, and various data, and performs subtitle packets for each program based on the broadcast data. In order to obtain and determine the presence or absence of caption data, the program map table is obtained from the transport stream, the packet ID of the caption is obtained from the program map table, and the packet ID obtained from the transport stream is obtained. A subtitle data presence / absence judging means for obtaining the attached subtitle packet and judging the presence / absence of subtitle data based on whether or not the subtitle packet is empty; Event information table from the event information table The service ID of the program being broadcast is acquired from the list based on the time and channel, the determination result storage means for storing the presence / absence of caption data in association with the service ID, and the caption operation input from the user is acquired. When the subtitle operation input means and the subtitle operation input from the user are acquired, it is determined whether or not there is subtitle data in the current program based on the stored result, and whether or not the subtitle can be selected according to the presence or absence of the subtitle data When the subtitle operation input from the user is acquired, the event information table is acquired from the transport stream, and the service ID of the program being broadcast is acquired from the event information table based on the time and channel. The presence / absence of subtitle data stored in association with the service ID is read from the determination result storage means. Out, it may be configured to and a subtitle selection control means for controlling whether or not subtitles selected according to the presence or absence of the caption data.

  As described above, according to the present invention, since the presence / absence of actual subtitles is stored for each program, it is not necessary to select subtitle data having no content only by its shape, thereby improving usability for the user. Can be made.

It is a figure which shows a program schedule. It is a figure which shows the program B. FIG. It is a figure which shows the program C. FIG. It is a figure which shows the 1st flowchart of this digital television. It is a figure which shows the 2nd flowchart of this digital television. It is a figure which shows a service information (SI) table. It is a figure which shows a part of program map table (PMT). It is a figure which shows a part of event information table (EIT). It is a figure which shows the discrimination | determination result of the presence or absence of subtitle data memorize | stored for every program.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a TV broadcast program table received by a digital TV according to an embodiment of the present invention, FIG. 2 shows a situation where English subtitles are selected in program B on 4CH, and FIG. This shows a situation in which English subtitles are selected in program C on 4CH.

  Subtitle (subtitle) data in digital television broadcasting is fixed for each channel (broadcasting station), and the number and number of subtitles are fixed. That is, in the example shown in FIG. 1, program A to program C are broadcast on 4CH, program D to program G are broadcast on 6CH, program H is broadcast on 8CH, and program I to program K on 10CH. Is being broadcast. In these cases, the number of subtitles is determined for each channel. Since English and French can be selected for 4CH, English and French subtitles can be selected for both Program B and Program C. However, whether or not the content data as subtitles is sent even in the same 4CH is different for each program.

  Assume that one of the subtitle languages that can be selected using the subtitle function is selected by operating the subtitle on / off button mounted on the TV remote control. As described above, for the same channel, there is no difference in the number of subtitles that can be selected (two in this example) and the language (English and French in this example). Therefore, as shown in FIGS. 2 and 3, even if program B and program C are different, the same number of subtitles can be selected. However, although an English subtitle is actually displayed when an English subtitle is selected in the program B, an English subtitle is not displayed in the program C even though an English subtitle is selected.

Next, FIG. 4 shows a flowchart for determining and storing the presence / absence of caption data, which is implemented by the digital television. This digital television receives a transport stream that is broadcast data, and processes video, audio, and various data separately.
In the figure, in order to determine which data, such as video, audio, subtitle, etc., from the data being broadcast, the transport stream (in which the video, audio, and various data of the program are stored ( Data relating to video, audio, and subtitles is extracted from TS (ETSI EN 301 192). The PMT (program map table) and EIT (event information table) defined in the service information (SI (ETSI EN 300 468)) are confirmed in order to confirm the detailed information from the extracted data. The contents of the service information are shown in FIG. 6, a part of the program map table (PMT) is shown in FIG. 7, and a part of the event information table (EIT) is shown in FIG.

Therefore, first, in step 11, a program map table is acquired from the transport stream.
The program map table (PMT) includes information for indicating an ID (PID) uniquely assigned for each channel caption. Therefore, in step 12, a subtitle ID (PID) is acquired from the program map table (PMT) (subtitle packet ID is acquired from the program map table). In step 13, the target subtitle data is obtained by extracting the packet with the same ID (PID) (acquisition of the subtitle packet with the same packet ID obtained from the transport stream). In step 14, it is confirmed whether or not the caption packet acquired in this way is empty (determining whether or not caption data exists based on whether or not the caption packet is empty). Whether or not it is empty corresponds to determining whether or not data actually exists.

If subtitle data is obtained by this method, but subtitle data without content data is sent, the ID (PID) assigned to the subtitle does not change even if the program is different. You must determine if the data is missing.
Therefore, a service ID uniquely assigned to each program is acquired from the event information table (EIT), and which subtitle data is empty in which program is associated and stored in its own memory.

Specifically, in step 15, an event information table is acquired from the transport stream, and in step 16, the service ID of the program being broadcast is acquired from the event information table based on the time and channel. In step 17, the presence / absence of caption data is stored in association with the service ID.
FIG. 9 is a diagram illustrating a determination result of the presence / absence of caption data stored for each program.
As shown in the figure, it is stored that program B has English and French subtitles, and program C has French subtitles but does not have English subtitles.
As described above, Steps 11 to 14 correspond to subtitle data presence / absence determination means, and Steps 15 to 17 correspond to determination result storage means.

FIG. 5 shows a flowchart for subtitle operation control performed by the digital television.
Since the presence / absence of subtitle data is stored for each program as described above, a receiver such as a TV reads the stored data every time the program (that is, the service ID) changes, and the contents of the selected program Only subtitle data with can be selected.
That is, in step 21, it is assumed that the user is watching a television broadcast. At this time, if the user operates the caption button of the remote controller, in step 22, the caption operation input from the user is acquired, and it is determined that the caption operation input has been made. In step 23, the event information table is acquired from the transport stream. In step 24, the service ID of the program being broadcast is acquired from the event information table based on the current viewing time and channel. .

In step 25, based on the acquired service ID, the presence / absence (storage result) of subtitle data stored in advance in association with the service ID is read. In step 26, if it is stored that there is subtitle data, the subtitle selection corresponding to the operation is permitted in the subtitle selection operation from the user. However, according to the presence / absence of caption data stored in advance, if there is no caption data corresponding to the operation, selection of the caption is not permitted even if there is an operation from the user. That is, whether or not caption selection is possible is controlled according to the presence or absence of caption data.
As a result, the user can select and operate only those that actually have subtitle data, and although the subtitle selection operation is performed, the user does not feel a problem that subtitles are not displayed. Steps 23 to 26 correspond to input means, and subtitle selection control means.

Needless to say, the present invention is not limited to the above embodiments. It goes without saying for those skilled in the art,
・ Applying mutually interchangeable members and configurations disclosed in the above embodiments by appropriately changing the combination thereof.− Although not disclosed in the above embodiments, it is a publicly known technique and the above embodiments. The members and configurations that can be mutually replaced with the members and configurations disclosed in the above are appropriately replaced, and the combination is changed and applied. It is an embodiment of the present invention that a person skilled in the art can appropriately replace the members and configurations that can be assumed as substitutes for the members and configurations disclosed in the above-described embodiments, and change the combinations and apply them. It is disclosed as.

Step 11 to Step 14: Subtitle data presence / absence determination means, Step 15 to Step 17: Determination result storage means, Step 22 ... Subtitle operation input means, Step 23 to Step 26 ... Subtitle selection control means.

Claims (5)

A digital television that receives a transport stream that is broadcast data and separates and processes video, audio, and various data,
Subtitle data presence / absence determining means for acquiring subtitle packets for each program based on the broadcast data and determining the presence / absence of subtitle data;
A determination result storage means for storing the determination result of the presence or absence of subtitle data for each program;
Subtitle operation input means for acquiring subtitle operation input from a user;
Subtitle selection control for determining whether or not there is subtitle data in the current program based on the storage result when subtitle operation input from the user is acquired and controlling whether or not subtitle data can be selected according to the presence or absence of subtitle data And a digital television. The subtitle data presence / absence judging means obtains a program map table from the transport stream, obtains a subtitle packet ID from the program map table, and subtitles attached with the packet ID obtained from the transport stream. 2. The digital television according to claim 1, wherein a packet is acquired and the presence / absence of caption data is determined based on whether the caption packet is empty. The determination result storage means acquires an event information table from the transport stream, acquires a service ID of a program being broadcast based on the time and channel from the event information table, and subtitles in association with the service ID The digital television according to claim 1 or 2, wherein presence or absence of data is stored. The subtitle selection control means acquires the event information table from the transport stream when the subtitle operation input from the user is acquired, and the service ID of the program being broadcast based on the time and channel from the event information table The presence / absence of subtitle data stored in association with the service ID is read from the determination result storage means, and whether or not subtitles can be selected is controlled according to the presence or absence of subtitle data. A digital television set according to claim 3. A digital television that receives a transport stream that is broadcast data and separates and processes video, audio, and various data,
Based on the broadcast data, a subtitle packet is acquired for each program, and in order to determine the presence or absence of subtitle data, a subtitle packet ID is acquired from the program map table, and the same packet is acquired from the transport stream. Subtitle data presence / absence determining means for acquiring a subtitle packet with an ID and determining whether or not the subtitle data is present depending on whether the subtitle packet is empty;

In order to store the determination result of the presence / absence of caption data for each program, an event information table is acquired from the transport stream, and a service ID of a program being broadcast is acquired from the event information table based on the time and channel, Discrimination result storage means for storing the presence or absence of caption data in association with the service ID;
Subtitle operation input means for acquiring subtitle operation input from a user;
When the subtitle operation input from the user is acquired, the user determines whether there is subtitle data in the current program based on the storage result, and controls whether or not subtitles can be selected according to the presence or absence of the subtitle data. When a subtitle operation input from is acquired, an event information table is acquired from the transport stream, a service ID of a program being broadcast is acquired from the event information table based on the time and channel, and the service ID is A digital television comprising: subtitle selection control means for reading the presence / absence of subtitle data stored in association with each other from the determination result storage means and controlling whether or not subtitles can be selected according to the presence or absence of subtitle data.