JP2002325214A - Related program referring receiver, related program referring transmitter and related program referring program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a related program referring receiver capable of grasping words and information used in a program viewed by a viewer without requiring labor of a viewer for investigation, a related program referring transmitter and a related program referring program. SOLUTION: A related program referring receiver 5 receiving a program adding related information related to a keyword corresponding to the keyword in the program is provided with a storing means 13 for storing received program, a keyword information retrieval means 15 for retrieving information concerning the keyword in the program viewed in accordance with a request from the viewer from the program stored to the storing means 13 based on the related information, and a display output means 17 for displaying and outputting the information concerning the keyword retrieved by the keyword information retrieval means 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for recognizing an unknown word in a broadcasted program or a broadcast program when the word is unknown to a viewer who views the program.
The present invention relates to a related program reference type receiving device, a related program reference type transmitting device, and a related program reference type program that can be known by referring to a program that has already been broadcast.

[0002]

2. Description of the Related Art In general, broadcast programs such as news programs and news are broadcast to an unspecified number of viewers. Therefore, depending on the viewers, unknown words and words whose meanings cannot be understood are broadcast. May be used in programs. In addition, there are some broadcast programs in which the contents of the currently broadcast program cannot be sufficiently understood unless the viewer has watched a previously broadcast program.

[0003]

For this reason, in some cases, the viewer stops viewing the program being broadcast, and uses a dictionary, newspaper, the Internet, or the like to input unknown words or words whose meaning is unknown. He needed to find out and understand. Alternatively, viewers have to wait until a previously broadcasted program is rebroadcast or sold in video or the like. In addition, since the broadcast program is intended for an unspecified number of viewers and has a limited broadcast time, there is a problem that it is difficult to sufficiently explain words considered difficult in the program.

[0004] An object of the present invention is to solve the above-mentioned problems of the prior art, so that a viewer can understand words and information used in a program watched by the viewer without having to search the viewer. It is an object of the present invention to provide a related program reference type receiving device, a related program reference type transmitting device, and a related program reference type program.

[0005]

According to a first aspect of the present invention, there is provided a related program reference type receiving apparatus for receiving a program corresponding to a keyword in a program and adding related information related to the keyword. A storage unit for storing the received program; and a program stored in the storage unit, based on the related information, information on a keyword in the program viewed in response to a request from a viewer. , And display output means for displaying and outputting information relating to the keyword searched by the keyword information search means.

According to such a configuration, when a program to which related information is added is received, the program is stored by the storage means. According to the viewer's request, the keyword information search means searches for information related to the keyword in the viewed program from the stored programs, and the information related to the searched keyword is displayed and output by the display output means. Is done.

[0007] The related information related to the keyword is:
It plays a role of an identifier linking a keyword and a program, and is a type of metadata indicating characteristics of the program such as a program name and a broadcast time. Also, the information related to the keyword is:
It refers to a program or a part of a program linked by related information.

[0008] In the related program reference type receiving apparatus according to the second aspect, in the related program reference type receiving apparatus according to the first aspect, when the program being broadcast is viewed, the keyword information search unit searches for the program. It is characterized by comprising time-shift reproducing means for detecting the time at which the information related to the keyword was viewed, and time-shifting and reproducing the broadcast program according to the time at which the information was viewed.

According to this configuration, the program being broadcast is time-shifted (shifted) and reproduced by the time-shift reproducing means in accordance with the time at which the viewer has watched the information related to the keyword information.

According to a third aspect of the present invention, in the related program reference type receiving apparatus according to the first or second aspect, the program is formed by a plurality of topic blocks divided by elapsed time; The display output unit displays a specific keyword corresponding to a topic for each topic block.

According to such a configuration, a program is formed by a plurality of topic blocks, and a keyword corresponding to the topic of each topic block is displayed by the display output means along with the topic block.

According to a fourth aspect of the present invention, there is provided a related program reference type transmitting apparatus, comprising: keyword extracting means for extracting a keyword in a program; related information setting means for setting related information related to the extracted keyword; Transmitting means for transmitting a program to which the related information set by the means is added.

According to such a configuration, the keyword is extracted by the keyword extracting means, the related information corresponding to the keyword used in the program is set by the related information setting means, and the related information is set for each program by the transmitting means. The relevant information is added, and the program is transmitted.

According to a fifth aspect of the present invention, there is provided a related program reference type program, comprising: a broadcast extracting apparatus for extracting a keyword in a program; a related information setting means for setting related information corresponding to the extracted keyword; Transmitting means for transmitting a program to which the related information set by the related information setting means is added; receiving means for receiving the transmitted program and the related information; storing means for storing the program received by the receiving means; Keyword information search means for searching information related to a keyword in a program viewed in accordance with the request from the programs stored in the storage means based on the related information, a keyword searched by the keyword information search means Characterized in that it functions as display output means for displaying and outputting the information according to (1).

According to this configuration, the related information corresponding to the keyword used in the broadcast program is set by the related information setting means, and the program to which the related information is added is transmitted by the transmitting means. . The transmitted program is received by the receiving means and stored by the storage means. After that, according to the request from the viewer, the keyword information search means searches for information related to the keyword from the programs stored based on the related information,
Information on the searched keyword is displayed and output by the display output means.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. (System with Related Program Reference Type Receiving Device and Related Program Reference Type Transmitting Device) FIG. 1 shows a related program reference type broadcasting system including a related program reference type receiving device and a related program reference type transmitting device. FIG. 4 is a function explanatory diagram illustrating the function of each configuration. As shown in FIG. 1, the related program reference type broadcasting system 1 includes a related program reference type transmitting device 3 and a related program reference type receiving device 5.

The related program reference type broadcasting system 1 stores a previously broadcasted program in a device on the viewer side when a viewer finds an unknown word while watching a certain program. In this system, the stored programs can be referred to interactively so that the viewer can understand the program being watched and improve the contact rate of the viewer to the broadcast program.

The related program reference type transmitting device 3 is a device installed on the broadcast station side, and is composed of a large-scale storage device storing broadcast programs, a transmitting device transmitting radio waves of various bands, and the like. That is, the keyword extracting means 7, the related information setting means 9, and the transmitting means 11 are functionally realized.

The keyword extracting means 7 is a program for extracting a keyword contained in a broadcast program. Keywords are, for example, program titles, economic terms, academic terms, or words used by newscasters that are difficult for ordinary viewers to understand, or words spoken by performers in the program (new modern terms, coined words). ) Etc. When the script of the program is text data, the keyword extracting means 7 extracts a word (word) having an appearance frequency higher than a certain value as a keyword based on the text data. If the script of the program is not text data, the voice uttered by the program performer is recognized and the keyword is extracted from the result.

The keyword extracting means 7 uses an index (hereinafter referred to as an index) embedded when the broadcast program is produced.
If there is an in-program index), keywords are extracted based on the in-program index. The in-program index describes (defined) a scene (scene) in the program using a video editing device, a scene description language, or the like.
It is an index. In other words, the in-program index is
Each specific topic is marked along with a turning point in the program content,
It includes the elapsed time (start time) and the title of the topic. For example, in the case of a one-hour news program, a plurality of in-program indexes are provided in one program such as "22 minutes elapsed:" sports "" or "55 minutes elapsed:" weather forecast "". Then, when the index within the program includes "22 minutes elapsed:" sports "", the keyword extracting means 7 extracts "sports" as a keyword.

The related information setting means 9 sets a certain program
This is a program for setting related information related to the keyword extracted by the keyword extracting means 7. The related information related to the keyword indicates the whole or a part of the program including the keyword in the title or the program explaining the keyword (refer to the index in the program). For example, if the keyword is “sports” For example, programs such as sports news, golf classrooms, and professional baseball broadcasts correspond.
That is, in the related information setting means 9, the related information of the keyword "sports" is set to "sports news", "golf classroom", "broadcast of professional baseball", and so on.

Further, the related information setting means 9 associates a certain program with a certain program (previously, based on a program name of a previously broadcasted program (refer to a transmission history or the like recorded in the storage device)). This is to set the time at which the broadcasted program) and the associated program are presented (displayed).

That is, the related information is "information indicating a program to be associated". Alternatively, when information such as a broadcast start time is added to a program to be broadcast, the related information is “information indicating a time at which a program to be associated is presented”.
It may be. In general, information indicating characteristics of a program (content), such as a program name, a broadcast start time, a broadcast time, a broadcast end time, a program creator, a broadcast station name, and a program genre, generally indicates the program (content). It is called “metadata”, and “metadata” is used in this specification in the same sense.

The transmitting means 11 adds the related information set by the related information setting means 9 to all the broadcast programs and transmits the broadcast program to the related program reference type receiving apparatus 5.
That is, in this embodiment, the keyword of the broadcast program transmitted from the related program reference type transmitting apparatus 3 is extracted by the keyword extracting means 7 for all the broadcast programs. Related information is set for each keyword in the program or for each index in the program.

The related program reference type receiving device 5 is a device installed on the viewer side, and is generally called a home server, and includes a main control device, an input / output device, a storage device, and a display device. And the like.
, Keyword information search means 15 and display output means 17
And the time shift reproducing means 19 are functionally realized.

The storage means 13 is constituted by a storage device such as a general hard disk, and receives and stores a broadcast program transmitted by the related program reference type transmission device 3. When storing the received program in the storage means 13,
In addition to the related information attached to the program, the storage time, the initial data of the related program reference type receiving device 5 (the identification number of the device), and the like are added to the program as the “ID at the time of storage”.

The keyword information search means 15 displays a specific keyword on the display screen of the display output means 17 so that the viewer can select the keyword along with the elapse of the viewing time of the program being viewed. Is a program for searching for related information associated with this keyword (information related to the keyword: a program describing the keyword, etc.) from the programs stored in the storage unit 13 when a specific keyword is selected. .

If the program stored in the storage means 13 includes an in-program index, the keyword information search means 15 selects a program with a program index corresponding to the keyword of the program being viewed. You can search only a part of. The program (a part of the program) searched by the keyword information search means 15 is reproduced in a non-linear manner.

The display output means 17 comprises a general display device such as a CRT and a liquid crystal and an output device for outputting sound, and displays and outputs programs stored in the storage means 13 and programs being broadcast. Is what you do. The keyword is displayed as “item name” on the display screen of the display device of the display output unit 17 by the keyword information search unit 15. This “item name” is iconized as an embedded button on the screen, and the viewer selects (clicks) this icon using a remote control, a mouse, or the like attached to the related program reference type receiving device 5.

The time shift reproducing means 19 stores the program being broadcast when the viewer selects the keyword presented by the keyword information retrieving means 15 while viewing the program being broadcast. And accumulate
This is a program that holds the time when the viewer selects the keyword, and allows the viewer to view the program from where the viewing of the program being broadcast has been interrupted after the viewer has viewed the information related to the keyword.

(Operation of Related Program Reference Type Broadcasting System) Next, with reference to the sequence chart shown in FIG. 2, the operation of the related program reference type broadcasting system (the operation of the related program reference type transmitting device 3, the operation of the related program reference type) The operation of the receiving device 5) will be described.

The related program reference type transmitting device 3 stores the produced broadcast program in a storage device in advance (S1), and extracts a keyword of each program of the stored broadcast program by the keyword extracting means 7. (S2). If the produced broadcast program is given an in-program index in advance, keywords are extracted according to the in-program index. A program which is information (related information) related to the keyword corresponding to the keyword extracted by the keyword extracting means 7 or a specific topic block in the program (each section separated by an index in the program) is set by the related information setting means. (S3). The programs set as “related information” here are the programs currently stored in the storage device of the related program reference type transmitting apparatus 3 and the programs broadcasted before.

Then, the related program reference type transmitting apparatus 3 adds the related information and the metadata (program name or the like) of the program to the related program reference type receiving apparatus 5 by the transmitting means 11 for each program. Transmit (broadcast) (S4). In this embodiment, the program, the related information, and the metadata are transmitted to the related program reference type receiving device 5 using a radio wave as a medium. However, the related program reference type transmitting device 3 and the related program reference type receiving device are used. 5 is connected via a communication line such as the Internet, distribution may be performed through this communication line. It should be noted here that "related information" is a kind of metadata. However, in this specification, the related information and the metadata are distinguished from each other and handled separately.

Then, the related program reference type receiving apparatus 5 receives the broadcasted program, the added related information and the metadata (S5), adds the storage time ID, and stores it in the storage means 13 (S6). . When storing in the storage unit 13, a database may be constructed in the storage unit 13 for each program keyword (for each genre), and the database may be stored.

After that, the operation of the system 1 will be described in consideration of the case where the viewer watches the program being transmitted (broadcast) from the related program reference type transmitting device 3 with the related program reference type receiving device 5. to continue. However, in the related program reference type broadcasting system 1, even programs stored in the storage unit 13 of the related program reference type receiving device 5 can refer to each other based on the related information.

The related program reference type transmitting device 3 transmits another program (S7). In this other program as well, a keyword is extracted by the keyword extracting means 7 and the related information is set by the related information setting means 9 in the same manner as the previously broadcasted program. Then, the related program reference type receiving device 5
Receives another broadcasted program, added related information and metadata (S8), adds an ID at the time of storage, stores it in the storage means 13, and displays the another broadcasted program. Displayed by the output means 17 (S
9).

Here, the keyword information is detected by the keyword information detecting means 15 of the related program reference type receiving apparatus 5 and divided into screens together with another program being broadcast and displayed on the display output means 17 (S10). . Usually, the display output means 17 displays a plurality of items. The display of the keyword by the keyword information detecting means 15 can be freely set by setting on the viewer side.

For example, when a viewer finds an unknown word in a program being viewed, a keyword is displayed by pressing a predetermined button on a remote controller or the like attached to the receiving device 5. If necessary, the viewer may use an input device (not shown) such as a keyboard provided in the receiving device 5 to directly input an unknown word into the input device. However, if the viewer uses an input device,
When the unknown word is directly input and there is no related information on the unknown word, a display indicating that there is no relevant program is displayed on the display output means 17.

The viewer selects a keyword displayed on the display output means 17 while watching another broadcasted program, and judges whether or not to view information (program) related to the keyword. (S11). If no keyword is selected, another program being broadcast is viewed as it is (S9).

When the viewer judges that he / she wants to view the information (program) related to the keyword, the time shift reproducing means 19 of the related program reference type receiving apparatus 5 causes the information (program) related to another program being broadcast and the keyword (program). (Program) is switched on the screen, the time at which another broadcasted program and the information (program) related to the keyword are switched is held, and the other broadcasted program is stored in the storage means 13 as it is. (S12). Then, the viewer views information (program) related to the keyword (S13).

Information (program) related to the keyword
Is displayed on the divided screen of the display screen of the display output means 17, an icon such as "Return" is always displayed at any time so that another program being broadcast can be viewed. Is displayed. The viewer selects (clicks) the "return" icon when it is determined from the information on the keyword that the keyword has been sufficiently understood. When the "return" icon is selected, the related program reference type receiving device 5 prompts the viewer to determine whether to select another keyword or to view another broadcasted program (S14).

If the "return" icon is selected and it is determined that another broadcasted program is to be viewed, the broadcasted another program is switched to the information (program) related to the keyword from the broadcast time. Another program being read is read from the storage means 13 and time-shifted and reproduced (S1).
5). On the display screen, the display is switched to another program on which information (program) related to the keyword is broadcast. Thereafter, the steps from S9 are repeated. In the case of a receiving apparatus capable of simultaneously displaying a plurality of programs on one display screen, information (program) related to the keyword and another broadcasted program are displayed on the display screen at the same time. It is also possible to switch only the sound to be output.

If it is determined that the "return" icon is selected and another keyword is selected, the process returns to S11 and the subsequent steps are repeated.

(Operation Example and Display Example of Related Program Reference Type Broadcasting System) FIGS. 3 and 4 are diagrams illustrating an operation example and a display example of the related program reference type broadcasting system 1. In the example shown in FIG. 3, the viewer is watching a news program (close-up modern) by HDTV, and the main operation is performed by a remote control (not shown) attached to the HDTV.
Done by

Before the viewer views the news program, the home storage device (storage means 1 of the related program reference type receiving device 5)
In 3), a database is constructed for each topic related to a program such as the previous close-up modern, near-miss, viewpoint / point of interest, yesterday's news and a news program to be viewed, and these information (programs) are accumulated.

As shown in the lower part of FIG. 3, these databases are based on the previous close-up
Only relevant parts are cut off from the broadcasted program and stored.For near misses, the video newly produced by the broadcasting station is stored.For viewpoints and issues, only the relevant parts are discontinued from the broadcasted program. For the news of yesterday, only relevant news items are cut and stored.

As shown in FIG. 4, the HDTV news program in this example is provided with four topic blocks A to D for changing a keyword to be displayed according to elapsed time. In the topic block A, “previous (last previous close-up modern)”, “near miss”, and “captain's union” are displayed as keywords. In the topic block B, “previous time (previous close-up modern time)” and “accident investigation committee” are displayed as keywords. In topic block C, the “Accident Investigation Committee” and the “Haneda Airport Offshore Accident”
Is displayed as a keyword. These keywords are
It is displayed by pressing the “menu” button on the remote controller during the time when each topic block A to D is explained. That is, selectable items (keywords) and the number of items are dynamically changed in accordance with program contents that change with the elapsed time.

Returning to FIG. 3, the description will be continued. First, a viewer presses a “menu” button on a remote controller while watching a news program by HDTV. Then, the screen is divided as shown in screen A, and the HDTV news program is moved to the upper left of the screen, and the “last time”,
Button-shaped icons describing keywords such as "near miss", "captain's association", and "news" are displayed.

Here, for example, when the viewer selects the “news” icon, as shown in screen B, the HDTV
News is displayed. In other words, only the relevant portion of "news of yesterday" is reproduced from the home storage device. While "Yesterday's News" is being played, news programs are stored in the home storage device.

At the bottom right of the screen of the HDTV news, a button-like icon "RETURN" is always displayed. When the viewer selects the “return” icon or when the news program ends, as shown in screen C, H
The DTV news program is reproduced from the point when the "news" icon is selected. That is, the viewer watches the HDTV news program in a time-shifted manner.

This embodiment has the following effects. In the related program reference type transmitting apparatus 3, the keyword is extracted by the keyword extracting means 7, the related information corresponding to the keyword used in the program is set by the related information setting means 9, and the transmitting means 11 sets the related information for each program. Since the set related information is added and the program is transmitted, the receiving side receiving the program can refer to the broadcasted programs by using the related information set for each program. it can.

When the related program reference type receiving apparatus 5 receives a program to which related information is added, the related program is stored in the storage means 1.
3 accumulates. Then, according to the viewer's request, the keyword information search means 15 searches the stored programs for information on keywords in the viewed program, and the display output means 17 outputs information on the searched keywords. Since the information is displayed and output, the viewer can understand the words (keywords) and information used in the program to be viewed without the viewer having to search for it.

Since the program being broadcast is time-shifted (shifted) and reproduced by the time-shift reproducing means 19 in accordance with the time at which the viewer has watched the information related to the keyword information, the viewing is unknown. Until the information (program) related to the keyword is referred to, the program being broadcast can be reproduced and viewed from the point of switching to the information (program) related to the keyword until the user can understand the information.

The received program has a plurality of topic blocks A to D
The keyword corresponding to the topic for each topic block is displayed along with the topic block by the display output unit 17.
Therefore, by selecting a keyword, the viewer can sufficiently acquire knowledge about words and information included in the topic that have no meaning. that's all,
Although the present invention has been described based on an embodiment, the present invention is not limited to this.

Each component of the related program reference type broadcasting system 1 can be handled as a program stored in a specific recording medium. Also in this case, the system 1
The same effect can be obtained.

[0056]

According to the first aspect of the present invention, when a program to which related information is added is received, the program is stored by the storage unit. According to the viewer's request, the keyword information search means searches for information related to the keyword in the viewed program from the stored programs, and the information related to the searched keyword is displayed and output by the display output means. Therefore, the viewer can understand the words (keywords) and information used in the program to be viewed without the viewer having to search for it.

According to the second aspect of the present invention, the program being broadcast is time-shifted (shifted) and reproduced by the time-shift reproducing means in accordance with the time at which the viewer views the information related to the keyword information. Therefore, it is necessary to refer to the information (program) related to the keyword until the user understands the unknown information, and then reproduce and view the program being broadcast from the point of switching to the information (program) related to the keyword. Can be.

According to the third aspect of the present invention, the received program is formed by a plurality of topic blocks, and a keyword corresponding to the topic for each topic block is displayed by the display output means along with the topic block. By selecting a keyword, the viewer can sufficiently acquire knowledge about words and information whose meaning is unknown in the topic.

According to the fourth aspect of the present invention, the keyword is extracted by the keyword extracting means, the related information corresponding to the keyword used in the program is set by the related information setting means, and the related information is set for each program by the transmitting means. Since the related information set in the above is added and the program is transmitted, the receiving side that receives the program can refer to the broadcasted programs by using the related information set for each program. Can be.

According to the fifth aspect of the present invention, when the related program reference type broadcast program receives the program to which the related information is added, the related program is stored by the storage means, and the keyword information search means is provided according to the viewer's request. Thus, the broadcast device is operated so that information related to the keyword in the viewed program is searched from the stored programs, and the information related to the searched keyword is displayed and output by the display output unit. The viewer can understand the words (keywords) and information used in the program to be viewed without the viewer having to search for it.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating functions of a related program reference type broadcasting system (a related program reference type transmitting device and a related program reference type receiving device) according to an embodiment of the present invention;

FIG. 2 is a sequence chart illustrating an operation of a related program reference type broadcasting system.

FIG. 3 is an explanatory diagram illustrating an operation example and a display example of a related program reference type broadcasting system.

FIG. 4 is an explanatory diagram schematically illustrating a broadcast program in a related program reference type broadcasting system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 related program reference type broadcasting system 3 related program reference type transmission device 5 related program reference type reception device 7 keyword extraction means 9 related information setting means 11 transmission means 13 storage means 15 keyword information detection means 17 display output means 19 time shift reproduction means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI theme coat ゛ (Reference) H04N 7/081 (72) Inventor Akitsugu 1-10-11 Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Corporation Broadcasting Inside the Technical Research Institute (72) Inventor Arisa Fujii 1-1-10 Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Corporation Japan Broadcasting Research Institute (72) Inventor Tatsuya Kurioka 1-1-10, Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Association Broadcasting Research Institute (72) Inventor Toshihiro Uehara 1-10-11 Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Corporation Broadcasting Research Institute F-term (reference) 5B075 NK02 NK31 PQ02 PQ05 PQ32 UU34 5C025 CA06 CA09 CB05 CB06 CB08 CB09 DA01 DA04 DA05 5C052 AC08 AC10 GA04 GA07 GB01 GB09 GC05 GE04 5C063 AB03 AB05 CA23 DA01 DA07 EB04 EB29 EB32 EB33 EB36 EB37 EB38 EB45

Claims (5)

[Claims] 1. A related program reference type receiving apparatus for receiving a program corresponding to a keyword in a program to which related information related to the keyword is added, comprising: a storage unit for storing the received program; Keyword information searching means for searching information related to a keyword in a program viewed in accordance with a request from a user from the programs stored in the storage means based on the related information; And a display output means for displaying and outputting information relating to the searched keyword. A related program reference type receiving apparatus, comprising: 2. When viewing a program being broadcast, the keyword information search means detects a time at which information related to the searched keyword is viewed, and, in accordance with the time at which the information is viewed, determines whether or not the program is being broadcast. 2. The related program reference type receiving apparatus according to claim 1, further comprising a time shift reproducing means for reproducing the program by time shifting. 3. The program is formed by a plurality of topic blocks divided by an elapsed time, and the display output means displays a specific keyword corresponding to a topic for each of the topic blocks. 3. The related program reference type receiving device according to 1 or 2. 4. A keyword extracting means for extracting a keyword in a program; a related information setting means for setting related information related to the extracted keyword; and transmitting the related information and the program set by the related information setting means. A related program reference type transmission device, comprising: 5. An apparatus related to broadcasting, keyword extracting means for extracting a keyword in a program, related information setting means for setting related information corresponding to the extracted keyword, related information set by the related information setting means. Transmitting means for transmitting a program to which a program is added, receiving means for receiving a transmitted program and related information, storing means for storing a program received by the receiving means, and a keyword in a program to be viewed according to a request from a viewer. Keyword information search means for searching for such information from the programs stored in the storage means based on the related information; display output means for displaying and outputting information relating to the keyword searched by the keyword information search means Related program reference type program characterized by functioning as