JP2001275092A - Method for transmitting digital broadcast, digital broadcast receiver, and digital broadcasting station system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmitting method for digital broadcasting which can easily be actualized even as to digital broadcasting using a ground wave and does not require complicated operation using GUI pictures. SOLUTION: The transmitting method for digital broadcasting which multiplexes other information with program data including digital encoded sound data or video data and transmits them is characterized by that the program data, downloaded data relating to the contents of the program data, and reference information for relating the downloaded data with the program data are multiplexed and the multiplexed signal is transmitted by using a specific frequency band.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcasting transmission method for multiplexing and transmitting video, audio, data and the like.
The present invention relates to a digital broadcast receiver and a digital broadcast station system.

[0002]

2. Description of the Related Art In recent years, digitalization of broadcasting has been rapidly advanced, and it has become possible to multiplex and transmit various types of information. There have been proposed various techniques which can provide a high value-added broadcasting service which has been impossible in the past. For example, Japanese Patent Application Laid-Open No. H11-146379 discloses a method for listening to a large number of audio channels for simultaneously transmitting ordinary video and audio by satellite digital broadcasting and repeatedly transmitting a specific song for each audio channel for listening. Data, a large number of compressed audio data for download for repeatedly transmitting one specific song compressed for download in association with these listening data, and one song for listening or downloading are selected by remote control operation or the like. GU to do
A technique for multiplexing and transmitting / receiving I-screen data has been disclosed. The user side receiving the multiplexed data has a receiver provided with an image output device, performs necessary processing from the GUI screen displayed on the image output device, and confirms with the transmission side. And download the desired song.

[0003]

However, in such a conventional digital broadcast transmission method and digital broadcast receiver, a large number of music pieces are repeatedly transmitted using a dedicated audio stream for each music piece. Therefore, a large number of audio data must be multiplexed as an audio stream in order to achieve the same transmission rate, which requires a large transmission capacity.

Therefore, the contents of the above-mentioned Japanese Patent Application Laid-Open No. 11-146379 are based on satellite broadcasting having a large transmission capacity, and it is difficult to realize digital broadcasting using terrestrial waves having a relatively small transmission capacity. In addition, in order to select or instruct music to be listened or downloaded, complicated operations must be performed using a GUI screen and a remote controller. Therefore, it is necessary to use an apparatus having image output means.
It was unsuitable for application to mobile devices and in-vehicle devices.

[0005] The present invention has been proposed in view of the above-mentioned conventional circumstances, and can be easily realized in digital broadcasting using terrestrial waves having a relatively small transmission capacity. Digital broadcast transmission method capable of realizing a high value-added service that can easily download various data and multimedia contents related to the program content being broadcast in real time without requiring complicated operations using a GUI screen , A digital receiver, and a digital broadcasting station system.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object, and multiplexes other information with digitally encoded program data including audio data or video data. It is premised on a transmission method of digital broadcasting to be converted and transmitted.

Here, the present invention multiplexes the program data, download data related to the contents of the program data, and reference information (for example, pointer information) for associating the download data with the program data. The multiplexed signal is transmitted using a specific frequency band.

[0008] By making the download data an audio data file or a video data file which is digitally encoded like music data, the music data can be downloaded while broadcasting.
Further, it is preferable that the download data is transmitted with a time delay with respect to the program content associated with the reference information. Alternatively, it is preferable that the program content is repeatedly transmitted before and after the end of the transmission period.

[0009] The reference information may be transmitted in a frame of a transmission unit different from a frame constituting a transmission unit of the program data, or may be transmitted as a part of a frame of a transmission unit of the program data. It may be.

[0010] The reference information may include period information in which the pointer information is valid, and identification information of a frequency band in which the pointer information is valid.

[0011] The multiplexed transmission data transmitted as described above is received by the following receiver. That is, the receiver has a function of outputting the program data in the multiplexed information.

The data decoding section extracts the download data obtained from the demultiplexing section and provides it to the user for downloading. At this time, the reference information obtained from the reference information decoder unit is referred to, and specific download data is downloaded.
Further, the user can input a download instruction from the operation input unit, and when there is an input instruction from the operation input unit, the control unit stores the download data specified by the reference information in the storage unit. It is designed to remember.

Whether or not the effective reference information is separated and output from the demultiplexing unit can be determined by the display state of the first display means. Whether or not the download data has been normally stored in the storage means can be determined by the display state of the second display means. Furthermore,
Advantageously, the storage means is a portable storage medium that is removable from the receiver.

The first display means can not only display that valid reference information has been obtained, but also can display the reason for invalidation when invalid reference information has been obtained. It is. Further, the second display means not only displays that the download data has been normally stored,
If the download data is stored in the storage means, it is possible to indicate that fact, and if the download data is not normally stored in the storage means, the content of the error can be displayed.

The broadcasting station system for realizing the above-described transmission method includes, of course, program editing means for editing program contents including digitally encoded program data including audio data or video data. It has.

First, the download data generating means generates download data related to the program contents. Further, the reference information generating means generates reference information for associating the program content and the download data, which are sequentially updated in correspondence with the program content. The multiplexing means multiplexes the download data and the reference information with the program data.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) First, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a time chart showing an outline of a digital broadcast transmission method according to the first embodiment of the present invention. Here, an audio broadcast service will be described as an example.

The main service of audio broadcasting is to convert program data composed of audio data into, for example, an audio stream 101.
It is transmitted as. The audio data constituting the program data includes various program contents. In the case of a music program as an example, a specific song or a specific song to which a short message (announcement) relating thereto is added. It is assumed that a tune is one constituent unit.

Here, the digital broadcasting according to the present invention is premised on digital broadcasting using terrestrial waves (particularly, ultrahigh frequency band or ultra high frequency band) having a relatively small transmission capacity.
Since it is assumed that the data is received by an in-vehicle device (a receiver to be described later), a transmission method suitable for such a broadcasting mode is adopted as described below.

That is, in FIG. 1, the audio stream 10
1 illustrates a case where a first song is broadcast as program data 102 from time t1 and then a second song is broadcast as program data 103 from time t2. FIG. 1 illustrates a case where download data 106 related to the program data 102 and download data 107 related to the program data 103 are transmitted as a data stream together with the audio stream 101.

The download data is content for realizing a high value-added service. Specifically, the download data is a compression-encoded data file of the same music as the music being broadcast, Examples include still image data of a jacket, character information data corresponding to the title of the music, or a compression-encoded moving image data file indicating a state in which the singer is playing.

As described above, according to the present invention, it is necessary to realize a high value-added service by digital broadcasting using terrestrial waves having a relatively small transmission capacity.
01 and the data stream share the same frequency band.

Further, in the present invention, the reference information 104 having the same contents is repeatedly transmitted between the start time t1 and the end time t10 of the program data 102, and the program data 10
3, the reference information 105 having the same content is repeatedly transmitted between the start time t2 and the end time t20. This reference information 10
4 is information for associating the program data 102 with the download data 106 (that is, the download data 106
And the reference information 105 stores information for associating the program data 103 with the download data 107 (that is, pointer information indicating the download data 107).

The pointer information differs depending on the multiplexing method and transmission method to be described later, but refers to information that can specify the download data. For example, when the three types of information are stream-transmitted in a time-division manner, an ID indicating download data added to a header of a frame as a unit of the stream transmission can be used as the pointer information.

The download data 106 and 107
The transmission start time or end time can be individually set according to the type of service. However, here, even if the user issues a download instruction near the end of the program data 102 or 103, the download of the target music can be performed. Is arranged such that the program data 102 and 103 are transmitted later than the end times t10 and t20.

By using a transmission method in which data having such a configuration is multiplexed, in a receiver described later,
At any time during the period in which one program content such as music is broadcast, reference information for specifying download data related to the program content can be obtained, and the user can use the reference information to obtain necessary information. Accordingly, the download data (target music) can be downloaded. That is, according to the present invention, complicated operations using the above-described conventional GUI screen are not required, so that even a user who is driving a car can download a target music by a simple operation. Becomes

It is to be noted that the reference information may include period information in which the pointer information is valid, identification information of a frequency band in which the pointer information is valid, and the like.

Here, the “period information in which the pointer information is valid” refers to a period in which the pointer information included in the reference information is valid, that is, the download is executed using the pointer information included in the reference information. Indicate the period during which you can do it. When such a configuration that includes the period information including the reference information is adopted, it is possible to hold the reference information for a certain period on the receiver side and execute the download as necessary, as described later.

The "identification information of the frequency band in which the pointer information is valid" is the identification information of the frequency band in which the pointer information contained in the reference information is valid, that is, the pointer information contained in the reference information is valid. Indicates the identification information of the broadcasting station. If such identification information is included in the reference information, no problem occurs even when the same pointer information is used between different broadcasting stations, as described later.

In the above description, a music broadcast is described as an example. However, an audio broadcast based on the contents of a program mainly composed of an announcement may be used. Further, the present invention can be applied not only to audio broadcasting but also to broadcasting using video as a main service. Also, a case has been described above in which one piece of reference information specifies a single piece of download data. However, a configuration in which one piece of reference information specifies a plurality of pieces of download data at the same time, A configuration for specifying data may be adopted. In addition, although the description has been made so that the download data is transmitted in the form of a stream, the download data may be transmitted by being divided into packets, for example. Furthermore, in the above description, the case where the start time / end time of the program content and the transmission period of the reference information are matched is described, but a slight time lag can be provided. That is, the program start time t1 (t
It is also possible to start transmission of the reference information shortly before 2) or to continue transmission of the reference information shortly after the end time t10 (t20) of the program.

Further, the scope of the present invention generally includes DA
B (Digital Audio Broadcasting), European Telecommunication Standard (ET) ET
Eureka 14 standardized in S300401
An ensemble of a 7-system digital audio broadcasting system is also included.

(Second Embodiment) As described above, according to the first embodiment, even a user who is driving a car can download a desired music by a simple operation. . However, in a place where the reception environment of the broadcast is bad (for example, in a tunnel), there are cases where the download process cannot be completed normally.

Therefore, in the present embodiment, the transmission method shown in FIG. 2 is adopted in order to download the desired music quickly and reliably. In FIG. 2,
The same parts as those in the configuration diagram of FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the configuration shown in FIG. 2, the download data 106a, 106b and 107a, 107b having the same contents are transmitted twice repeatedly before and after the end of the reference information 104 and 105. By repeatedly transmitting the download data of the same content in this manner, the user can download the first download data transmitted before the end of the program content or fail to download the first download data. In this case, it is possible to select, for example, to download the second download data transmitted from near the end of the program contents, and it is possible to realize quick and reliable download. In the above description, the case where the download data is repeatedly transmitted twice has been described. However, the number of times and the position of the repetition of the download data are not limited thereto.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a configuration diagram showing an example of a digital broadcast transmission method according to the third embodiment of the present invention. Note that, in FIG. 3, the same portions as those in the configuration diagram of FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the configuration shown in FIG. 3, the reference information 104a is transmitted as a part of a transmission frame constituting the program data 102, and the reference information 105a is transmitted as a part of a transmission frame constituting the program data 103 together with the contents of each program. It is supposed to be. MP is an example of an audio encoding system capable of transmitting such an audio stream 101.
FIG. 4 shows the frame structure of the EG layer 2. This figure 4
As shown in the above, in the frame structure of the MPEG layer 2, there is an ancillary data area (auxiliary information area) at the end of the frame, and it is easy to store the reference information in this area. In the frame structure of the MPEG layer 2 shown in FIG. 4, the header includes an encoding method, a bit rate, and a sampling frequency, and the frame information includes information on bit allocation necessary for decoding the frame. , Bit weight information is recorded, and sampled digital audio (or video) bits are written in the sample data area. By transmitting a plurality of such frames in time series, one program data 102 (or 10
3) will be formed. Therefore, the same reference information is written in each ancillary data area corresponding to specific program contents.

According to the configuration of the present embodiment, since it is not necessary to transmit reference information using an independent frame, multiplexing is facilitated and more reliable transmission of reference information becomes possible. It is also possible to reduce the capacity of the memory provided on the machine side.

In the above description, the MPEG layer 2 is exemplified as the audio encoding method. However, in various other encodings, storing reference information in a similar area can be easily realized.

The reference information transmitted as a part of the transmission frame as described above includes not only pointer information but also pointer information.
It goes without saying that the above-mentioned “period information in which the pointer information is valid” and the “identification information of the frequency band in which the pointer information is valid” may be included. (Fourth Embodiment) FIG. 5 is a block diagram showing the configuration of a broadcasting station system according to the present invention.

The server 401a stores audio data such as music, which is the main information of the program contents, and the server 401b stores audio data for download.

Here, the audio data stored in the server 401a may have been edited so as to shorten the playing time in accordance with the broadcast time or the contents, or some kind of announcement sound may have been added in advance. sell. On the other hand, the download data stored in the server 401b may be a specific piece of music that is not edited, such as audio data stored in the server 401a, in consideration of the user downloading and reusing a specific piece of music. Only data, which is data that has been encoded in advance.

When image data such as a photograph of a CD jacket is required in addition to the music data of the server 401b, it is necessary to provide another server 401c.

Further, the main information of the program contents and the information for download may be common at least for an audio part. Therefore, the audio data may be stored in one of the servers, and the audio data and the download data of the program contents may be separately generated in the program editing stage.

The program contents editing means 403 operates so that the program proceeds according to a predetermined schedule.
The server 401a and download data generation means 402, which will be described later, store the time data for specifying the time of the program contents and the music specification data for specifying the music used for the program contents.
Give to. Then, the program content editing means 403 sequentially calls the specified music pieces from the server 401a at a necessary time and uses them to edit the program data 102, 103,. Necessary information such as the added announcement information is also edited and transmitted. The data of the program contents edited in this way is encoded (compressed), output and input to the multiplexing means 405.

On the other hand, the download data generating means 402 for controlling the server 401b storing the download data receives the time data and the music identification data from the program content editing means 403, and receives the download data ( If necessary, the image data stored in the server 401c is transmitted to the multiplexing unit 405. Further, the download data generating means 402
Is configured to input information (pointer information) for specifying the download data to be transmitted to the reference information generating means 406 described below.

That is, the reference information generating means 406 receives, from the program content editing means 403, data (for example, billing data) necessary for operation of the system in addition to the time data and the music specifying data, Is received from the download data generating means 402. The time data is used to determine the timing of sending this reference information to the multiplexing means 405, and the music identification data and pointer information are edited into reference information and transmitted to the multiplexing means 405 based on the time data. It is transmitted at the determined timing.

As described above, the program content data, reference information, and download data input to the multiplexing means 405 are:
The transmission data multiplexed in consideration of the timing required to realize the transmission data structure shown in FIGS. 1 and 2 and the transmission data multiplexed as described above Alternatively, it is in the form of a packet and is transmitted wirelessly or by wire.

The transmission signal generated in this manner is a set of frame units as shown in FIG. 4, for example, for the program content data A, the reference information B, and the download data C.

Here, when the frames are arranged on the time axis, the reference information B is sandwiched between the program contents A as shown in FIG. 6A, and in the context of FIG. Is completed, the download data C is inserted into the frame sequence. In FIG. 1, download data 106 corresponding to the previous program data 102 is partially inserted in the time zone of the program data 103.

In connection with FIG. 2, as shown in FIG. 6B, the corresponding download data C is inserted into the frame sequence before the reference information B ends.
Further, referring to FIG. 3, first, in FIG. 5, the program editing means 403 incorporates the reference information generated by the reference information generating means 406 into a frame and passes it to the multiplexing means 405. And reference information B are transmitted in the same frame.

(Fifth Embodiment) FIG. 7 is a block diagram showing a configuration of a digital broadcast receiver according to a fifth embodiment of the present invention. The transmission signal generated on the broadcast station side as described above is processed by the receiver having the following structure.

That is, in FIG. 7, the received signal is input to the demodulation unit 201 through an amplification process and the like. Here, the demodulated received signal is input to the demultiplexing / demultiplexing unit 202, and the video or audio stream included in the received signal, the data stream for download, and reference information are separated. Of these, the video or audio stream is passed to the information source coding / decoding section 203 and subjected to decoding processing, and then output by an output means 204 such as a CRT, a liquid crystal display, and a speaker.

On the other hand, the reference information obtained by the demultiplexing unit 202 is extracted by the reference information decoding unit 208.
As described above, the reference information is a specific program data 1
Since the same content is repeatedly transmitted in the time zone of 02 (or 103), the output of the reference information decoding unit 208 includes the reference information of the download data related to the specific program content output from the output unit 204. Is repeatedly output.

In this state, an operation performed by the user of the present digital broadcast receiver in accordance with the program content output from the output means 204 (for example, input for instructing download)
Is input from the operation input unit 210, the reference information at that time is transmitted from the reference information decoding unit 208 to the control unit 20.
9 and held. In this state, the control means 20
9 puts the storage means control unit 206 in a standby state and gives the reference information to the data decoding unit 205. here,
As the operation unit 210, a switch such as a push button, a touch sensor on a display screen, a voice command, or the like can be used.

On the other hand, the download data separated by the multiplexing / demultiplexing unit 202 is input to a data decoding unit 205. When the download data specified by the reference information is input, the data decoding unit 205 As described above, the download data is passed to the storage unit control unit 206 in the standby state, and the storage unit control unit 206 stores the download data in the storage unit 207. As the storage means 207, a portable semiconductor memory, an optical disk medium, a magnetic disk medium, a magnetic tape medium or the like can be used, and the receiver has a storage medium mounting means (not shown) to which the storage means 207 can be mounted.

Further, the information is added to the receiver or
The download data reproducing apparatus separate from the receiver is equipped with the storage means 207, and has a function of reading and reproducing the download data stored in the storage means 207 as described above. Make music easy to play.

As described above, according to the digital broadcast receiver according to the fifth embodiment of the present invention, it is possible to continuously enjoy a received video / audio program while simplifying the content of the broadcast program by a simple operation. Download data including related contents can be easily stored in the storage means.

In the above description, the case where one download data is stored by one operation has been described. However, it is also easy to store a plurality of data.

The timing at which the reference information held in the control means 209 is provided to the data decoding unit 205 as described above is not particularly limited. That is, this timing can be specified by the user using the operation input unit 210. Of course, when such a configuration is adopted, the validity of the reference information becomes a problem. This will be described later.

(Sixth Embodiment) Next, a sixth embodiment of the present invention will be described with reference to the drawings.

FIG. 8 is a block diagram showing a configuration of a digital broadcast receiver according to a sixth embodiment of the present invention. In FIG. 8, the same portions as those in the block diagram of FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted.

In the first display means 301, the reference information demultiplexed by the demultiplexing section 202 is input to the reference information decoding section 208 and decoded normally, and valid reference information is obtained at its output. When you show it.

The second display means 302 displays the downloaded data when the storage means 207 is normally stored in the storage means 207 by the storage means control section 206. As these display means, a light emitting body such as a light emitting diode, a sounding body such as a speaker or a buzzer, an icon on a display screen, or the like can be used.

With the above-described display means, the digital broadcast receiver according to the sixth embodiment of the present invention allows the user to determine whether or not there is any content that can be designated for download and to complete the download of the content by these displays. Can be easily known.

In the above description, the first display means 301 displays that valid reference information has been obtained, but the present invention is not limited to this. That is, when invalid reference information is obtained, the first display unit 301 can also display the invalid reason. For example, if the current time is not within the “period information in which the pointer information is valid”, a message such as “the validity period has passed” or the like is displayed. If it is different from the "frequency band identification information", the first display means 301 may display a message such as "Please change the broadcasting station".

In the above description, the second display means 302 displays that the download data has been normally stored, but the present invention is not limited to this. That is, while the download data is being stored in the storage means 207, the fact is indicated. If the download data is not normally stored in the storage means 207, the content of the error is displayed in the second display means 30.
2 can also be displayed.

Hereinafter, the present embodiment will be described in more detail by showing an external view of a receiver.

That is, in the receiver shown in FIG.
When the download processing is possible, the lamp 506 is turned on. When the user presses the download button 503, a lamp 507 indicating that the download process is being performed is turned on, and thereafter, when the download process is completed, the lamp 508 is turned on.

As described above, FIG. 9A illustrates an example in which three lamps functioning as the second display means 302 are provided, but the present invention is not limited to this. For example, as shown in FIG. 9B, the same effect as described above can be obtained by a configuration without the lamp 507 indicating that the download process is being performed. That is, in the receiver shown in FIG. 9B, the lamp 506 blinks during the download process.

Reference numeral 501 denotes a tuning knob, reference numeral 502 denotes a preset tuning button, reference numeral 504 denotes a volume knob, and reference numeral 505 denotes a display. The display 505 serves as the second display means 302 as described below. It can also be used.

That is, the indicator 5 of the receiver shown in FIG.
In FIG. 05, when download processing is possible, a message such as “Download Ready” is displayed as shown in FIG. 11A, and when the user presses the download button 503, a message shown in FIG. As shown, a message such as "Now Downloading" is displayed. When the download processing is completed, a message such as “Download OK!” Is displayed as shown in FIG. 11C, and when the download processing is failed, “Download Error!” Is displayed as shown in FIG. 11D. Are displayed on the display unit 505.

When the display 505 is used as the second display means 302 as described above, the same effect as described above can be obtained even with a configuration without the lamps 506 to 508. It is needless to say that this display 505 can be used not only as the second display means 302 but also as the first display means 301.

[0075]

As described above, according to the present invention, it is possible to easily transmit download data even with a terrestrial wave having a small transmission capacity, and the user can give an instruction or confirmation from the receiver to the broadcasting station. Download data can be easily received without issuing a message. Further, since the operation of the receiver itself is simple, it becomes possible to use the receiver as a mobile receiver or for a vehicle.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an example of a digital broadcast transmission method according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating an example of a digital broadcast transmission method according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram illustrating an example of a digital broadcast transmission method according to a third embodiment of the present invention.

FIG. 4 is a diagram illustrating a frame configuration in a digital broadcast transmission broadcast according to a third embodiment of the present invention.

FIG. 5 is a block diagram showing a broadcast station system of the present invention.

FIG. 6 is a conceptual diagram illustrating a transmission signal according to the present invention.

FIG. 7 is a block diagram illustrating a configuration of a digital broadcast receiver according to a fifth embodiment of the present invention.

FIG. 8 is a block diagram illustrating a configuration of a digital broadcast receiver according to a sixth embodiment of the present invention.

FIG. 9 is an external view of a digital broadcast receiver according to a sixth embodiment of the present invention.

FIG. 10 is an external view of another digital broadcast receiver according to a sixth embodiment of the present invention.

FIG. 11 is an enlarged view of a display of another digital broadcast receiver according to a sixth embodiment of the present invention.

[Explanation of symbols]

 101 audio stream 102 (103) program contents 104 (105) reference information 106 (107) download data 202 demultiplexing unit 203 information source coding / decoding unit 204 output unit 205 data decoding unit 208 reference information decoding unit 209 control unit 210 operation Input means 301 First display means 302 Second display means 402 Download data generation means 403 Program content editing means 405 Multiplexing means 406 Reference information generation means 407 Modulation means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/44 H04N 5/76 Z 5/445 7/08 Z 5/76 (72) Inventor Hirofumi Sone Osaka 1006 Kadoma Kadoma, Kadoma City, Matsushita Electric Industrial Co., Ltd. Matsushita Electric Industrial Co., Ltd. (72) Inventor Shuichi Ninomiya 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (25)

[Claims] 1. A digital broadcast transmission method for multiplexing and transmitting other information to program data including digitally encoded audio data or video data, wherein the program data and contents of the program data are provided. And transmitting reference data for associating the download data with the program data, and transmitting the multiplexed signal using a specific frequency band. 2. The digital broadcast transmission method according to claim 1, wherein the reference information includes at least pointer information for specifying the download data. 3. The digital broadcast transmission method according to claim 2, wherein the reference information further includes information on a period during which the pointer information is valid. 4. The digital broadcast transmission method according to claim 2, wherein the reference information further includes identification information of a frequency band in which the pointer information is valid. 5. The digital broadcast transmission method according to claim 1, wherein the download data is transmitted with a time delay with respect to the program data associated with the reference information. 6. The digital broadcast transmission according to claim 1, wherein the download data is repeatedly transmitted before and after an end time of a period in which the program data associated with the reference information is transmitted. Method. 7. The digital broadcast transmission method according to claim 1, wherein the download data is a digitally encoded audio data file or video data file. 8. The digital broadcast transmission method according to claim 1, wherein the reference information is transmitted as a part of a frame constituting a transmission unit of the program data. 9. The digital broadcast transmission method according to claim 1, wherein the multiplexed signal is an ensemble in the Eureka 147 digital audio broadcasting standard. 10. The digital broadcast transmission method according to claim 1, wherein the specific frequency band is an ultra high frequency band or an ultra high frequency band. 11. A multiplexed signal transmitted by multiplexing other information with digitally encoded program data including audio data or video data and receiving the multiplexed signal, separating the multiplexed information from each other. A digital broadcast receiver for outputting audio or video, wherein the multiplexed signal is a program data, download data related to the content of the program data, and a reference for associating the download data with the program data. A multiplexing / demultiplexing unit for separating the multiplexed information; a data decoding unit for extracting the download data obtained from the multiplexing / demultiplexing unit; and a multiplexing / demultiplexing unit. A reference information decoder unit for extracting the obtained reference information, an operation input unit capable of inputting a download instruction from a user, at least A storage unit for storing the download data, and based on the reference information obtained from the reference information decoding unit and an instruction signal obtained from the operation input unit,
Control means for controlling the storage of the download data specified by the reference information in the storage means. 12. The digital broadcast receiver according to claim 11, wherein the reference information includes at least pointer information for specifying the download data. 13. The digital broadcast receiver according to claim 12, wherein the reference information further includes information on a period during which the pointer information is valid. 14. The reference information further includes identification information of a frequency band in which the pointer information is valid.
2. A digital broadcast receiver according to claim 1. 15. The digital broadcast receiver according to claim 11, further comprising first display means for displaying whether or not said reference information obtained from said demultiplexing section is valid. 16. The digital broadcast receiver according to claim 15, wherein the first display means displays that the reference information has invalid period information. 17. The digital broadcast receiver according to claim 15, wherein the first display means displays that the reference information has invalid frequency band identification information. 18. The digital broadcast receiver according to claim 11, further comprising second display means for displaying that said download data has been normally stored in said storage means. 19. The digital broadcast receiver according to claim 11, further comprising second display means for displaying the fact that said download data is being stored in said storage means. 20. The digital broadcast receiving apparatus according to claim 11, further comprising a second display unit for displaying an error content when the download data is not normally stored in the storage unit. Machine. 21. The digital broadcast receiver according to claim 11, wherein said storage means is a portable storage medium detachable from said receiver. 22. Digital broadcast broadcasting in which the contents of program data including digitally encoded audio data or video data are edited by program editing means, and other information is multiplexed, modulated, and transmitted to the program data. A station system, download data generating means for generating download data related to the contents of the program data, reference information generating means for generating reference information for associating the download data with the program data, and the program data Multiplexing means for multiplexing the download data and the reference information. 23. The digital broadcast station system according to claim 22, wherein the reference information includes at least pointer information for specifying the download data. 24. The digital broadcast station system according to claim 23, wherein the reference information further includes information on a period during which the pointer information is valid. 25. The reference information further includes identification information of a frequency band in which the pointer information is valid.
A digital broadcasting station system according to item 1.