JP2005039667A - System and method for transmitting and receiving data, data receiver and data transmitter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the degree of freedom to select reproduction package data in a receiving side in a system for separating complex data consisting of a plurality of contents data into package data in each type and sequentially transmitting the package data. <P>SOLUTION: A receiving terminal 3 in a broadcasting system 1 selects contents data that can be received by the receiving terminal 3 by preparing a correspondence table for terminal profiles and data IDs. For example, if sound data is selected, the sound data is sent to a sound decoding circuit 41 and outputted from speakers 44L and 44R. Also, if moving image data is selected between a moving picture and a still picture, package data about the other video contents are discarded, the moving image data are decoded in a moving picture decoding circuit 36 and displayed on a displaying part 41. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a data transmission / reception method and data transmission / reception system for transmitting / receiving various data including moving image data, still image data, audio data, and text data, and a data reception device and data transmission device used in this system.

  In conventional radio broadcasts that transmit analog signals, there are cases where character data can be transmitted as in FM character multiplex broadcasting, but because the frequency band of the broadcast wave is narrow, the data that can be transmitted is mainly audio signals. On the other hand, in recent years, transmission systems that transmit digital signals have appeared, and it has become possible to transmit moving image data and still image data in addition to audio data and character data without expanding the frequency band. However, the moving image data here is not moving image data broadcasted by digital television broadcasting, but relatively small-capacity data that does not require the image quality of television broadcasting.

  When broadcasting multimedia contents composed of a plurality of data as a program as described above, for example, a data display format is described using BML (Broadcast Markup Language) or other data broadcasting dedicated description languages. Broadcast. At this time, if the receiving terminal is compatible with the data format of a plurality of data included in the received multimedia content, the contents of the program produced on the providing side can be reproduced. However, it is necessary to make all the receiving terminals compatible with a predetermined data format, and it is necessary to provide each receiving terminal with a function that is unified to some extent. In this case, diversification of the specifications of the receiving terminal and addition / change of the data format Is expected to be difficult.

  Therefore, the specifications of all the receiving terminals do not have to be unified, and by making it possible to change the setting of the data to be used among the plurality of data included in the multimedia content received for each receiving terminal with other data A broadcasting system that can change the data display method for each receiving terminal has been proposed (see Patent Document 1). According to the technology described in Patent Document 1, package data to be divided and reproduced and package data to be discarded are selected according to the type of data.

JP 2002-330110 A

  The system described in Patent Document 1 provides packaged contents and package data is selected according to a filter control table preset in the receiving terminal. Therefore, the functions of the receiving terminal need not be unified to some extent. Although there is an advantage that the content can be played back without depending on the receiving terminal, the content collected as package data is not only different types, but for example, the same music content but the compression format is different. May be sent. In such a case, the data format in which the same music content can be received depends on whether or not the receiving terminal supports these formats. The main focus was on sorting by package. That is, it cannot be said that the conventional system completely considers the performance (specification) difference of the receiving terminal.

  Therefore, the present invention has been proposed in view of the above-described conventional situation, and in a system in which composite data composed of a plurality of content data is separated into package data for each type, and the package data is sequentially transmitted. An object of the present invention is to provide a data transmission / reception system that improves the degree of freedom of selection of reproduction package data on the side, a data reception device and a data transmission device applied to the data transmission / reception system.

  Therefore, the data transmission / reception system according to the present invention adds package data generation means for generating package data by adding information for distinguishing content data and dividing the composite data into data types, and transmits the generated package data. A package data receiving means for receiving a package data by receiving a package data by dividing a series of composite data composed of a plurality of content data into data types by a data transmitting device comprising a package data transmitting means for receiving the package data; Storage means for storing a list of information about various data, received data selection control means for selecting and extracting receivable data stored in the storage means from package data received by the package data receiving means, and selecting and receiving Data having playback means for playing back the content data By the receiving device, and to receive the divided data were sorted at the receiving side.

  In addition, the data transmission / reception method according to the present invention generates package data by adding information for distinguishing each content data on the data transmission side to divide the composite data for each data type, and the package on the data reception side. From the package data received in the data receiving step, the receivable data stored in the storage means storing the list of information related to the data that can be received by itself is selected and extracted.

  In particular, the data receiving apparatus includes reproduction content selection means for further selecting content data to be reproduced by the reproduction means from the selected and received content data, and the received data selection control means is selected by the reproduction content selection means. Preferably, the list stored in the storage unit is updated based on the content data, and the content data included in the list is selected and extracted.

  Also, display means for displaying moving image and still image data and sound output means for outputting audio data are prepared as reproduction means in the data receiving device, and content data display assignment in the display means by the reproduction content selection means, or It is also possible to select allocation of audio output in the audio output means.

  At this time, the content name or the encoding / decoding format of the content data is included in the information for distinguishing each content data added by the data transmitting device and the information regarding the receivable data stored in the data receiving device. Good.

  According to the broadcasting system of the present invention, on the transmitting side, the composite data is divided for each data type, information for distinguishing content data is added and transmitted as package data, and the received package data is received on the receiving side. By selecting and extracting the data corresponding to the list of information relating to receivable data stored in the storage means, the degree of freedom in selecting the reproduction package data on the receiving side can be improved. As a result, even if the specifications of the data receiving apparatus are diverse, the data transmitting apparatus side can organize the composite data without considering the specifications, so that there is an advantage that the cost required for organizing the composite data can be reduced.

  In the data transmission / reception system shown as a specific example of the present invention, program data is composed of a plurality of content data on the transmission side, and the program data is further divided into data types and transmitted, and the transmitted data is received on the reception side. It is a broadcasting system that selects and receives and plays back at

  Here, particularly in the case of digital radio broadcasting in which program content data is transmitted as a digital signal, a broadcasting station as a data transmission device adds a data ID as information for distinguishing each content data constituting the program data. Is divided into package data.

  On the other hand, a receiving terminal as a data receiving device has a function of reproducing music data and video data, and is characterized in that it stores a list of information on data that can be received by itself. The receiving terminal selects and extracts receivable data from the received package data based on the list, and the user can select content data to be reproduced from the extracted content data. The receiving terminal can select the content data to be extracted by updating the list based on the content data instructed to be reproduced.

  Here, the data ID includes information regarding the content name and the encoding / decoding format of the content data. In addition, display settings and output settings of the display unit and the audio output unit that display moving image and still image data can be changed according to the type of content data identified by the data ID. For example, the display unit is divided to display both package data for moving image data and package data for still image data, package data for main sound (Japanese) on the right speaker, and sub sound ( (English) package data can be output.

  Hereinafter, a broadcast system 1 shown as a specific example of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the broadcasting system 1 includes a data transmitting device 2 and a receiving terminal 3 in a broadcasting station, so that program data distributed as a digital signal from the data transmitting device 2 is received by the receiving terminal 3. It has become. Although only one receiving terminal 3 is shown in FIG. 1, there are actually a plurality of receiving terminals. There are various types of receiving terminals, such as a type 3a incorporated in a stationary stereo set, an in-vehicle stereo built-in type 3b, and a portable dedicated terminal 3c. The receiving terminal needs to have at least the basic configuration described with reference to FIG. 2, but the type of data that can be reproduced is determined by the performance of the receiving terminal.

  This specific example is characterized in that the content data received from the content data transmitted from the data transmission device 2 or the content data to be reproduced further from the received data can be selected according to the performance of the receiving terminal. Yes.

  Next, specific configurations of the data transmission device 2 and the reception terminal 3 of the broadcasting station will be described with reference to FIG. The data transmission device 2 includes a material storage unit 21 in which the program material 10 is stored, a program organization unit 22 that organizes the material to form a program, and package data for transmitting a program produced by the program organization unit 22 A package data generation unit 23, a data ID recording unit 24 that describes a data ID for distinguishing data from the package data, and a transmission unit 25 that transmits the package data.

  The material storage unit 21 stores the material that is the basis of the content data constituting the program. The program material 10 is an image such as a moving image or a still image, sound, music, characters, or the like. These program materials 10 are used as content data in the program organization unit 22 and are organized as one program. Therefore, although not shown, the data transmission device 2 has a configuration for inputting the program material 10 and storing it in the program storage unit 21. The operation of each of these components is comprehensively controlled by a control unit (not shown).

  The program organization unit 22 extracts the program material 10 from the program storage unit 21 and organizes a broadcast program. Therefore, the program data here is composed of a plurality of content data produced from each material.

  The package data generation unit 23 generates package data by dividing the program data described above for each data type. At this time, the data ID recording unit 24 uses the package data as information for distinguishing content data from each package data. The data ID is added. For example, moving image data, still image data, audio data, character (text) data, and program data are each divided into one package. Therefore, the data ID, which will be described in detail later, is an ID indicating the type of the content data or program material, and corresponds to the compression coding information of the data distinguished by this ID. In addition, information that directly informs the user of content classification, such as the name of content data, may be included.

  As described above, when transmitting the program data to the transmission unit 25, the data transmission apparatus 2 divides the program data into a plurality of package data, not as one data, and transmits it as a series of package data groups. In the transmission unit 25, these package data groups are converted into packet data for transmission and transmitted.

Here, transmission data transmitted from the data transmission device 2 will be described with reference to FIG. The generated package data is converted into transmission packet data P ₀ , P ₁ ,... Having a predetermined data length including a header by the transmission unit 25 and transmitted to the outside at a predetermined cycle T. The In the packet data for transmission, package data areas D ₀ , D ₁ , D ₂ ,... Are provided in a predetermined size following the header H ₀ .

In the header H ₀ of the transmission packet, the size, time information and the like of the transmission packet data P ₀ are described. Further, the package data area further includes compression encoding information (codec information) of the package data, a content information description area such as a content name, an actual data description area, and the like. Although the data description area has a variable length, when one content data is not completed with one packet data, it is described over a plurality of package data divided into a plurality of packet data. However, the data ID, codec information, content information, etc. are defined in advance or described in the header, and the information described here and what it means also in the receiving terminal Suppose it is known.

  Next, the receiving terminal 3 will be described. The receiving terminal 3 shown in FIG. 2 includes an antenna 31, a tuner circuit 32, and a transmission path decoding circuit 33 as a configuration for receiving package data transmitted by the data transmitting apparatus 2. In addition, the receiving terminal 3 stores a list storage unit 34 that stores a list of information related to data that can be received by itself, and a correspondence table that associates the list stored here with the data ID of the transmitted package data. A package table 36 for extracting receivable data based on a correspondence table in which the list stored in the list storage unit 34 is associated with the data ID of the transmitted package data. It has. The receiving terminal 3 further serves as a means for reproducing the content data extracted by the package filter 35. The moving picture decoding circuit 37, the still picture decoding circuit 38, the text decoding circuit 39, the display unit 41, the display for decoding the respective data A display driver 40 for driving the unit 41 is provided. The configuration for outputting audio data includes an audio decoding circuit 42, a D / A conversion circuit 43, an amplifier 44L (44R), and a speaker 45L (45R). These are centrally managed by a control unit 46 including a CPU, a ROM storing a program executed by the CPU, and a RAM as a work area. In addition, an operation input unit 47 that allows the user to select and operate the receiving terminal 3 according to a GUI or the like displayed on the display unit 41 is provided.

  By the way, as shown in FIG. 1, the receiving terminal 3 generally has different display capabilities such as the type and size of a data format (codec) that can be displayed and speaker performance depending on the performance of each terminal. For example, as shown in FIG. 4, the setting of the display unit 41 is determined in advance such that a half surface is an area for displaying moving image data and still image data and a half surface is an area for displaying text data. In some cases, there are restrictions on the setting of the playback device such that moving image data and still image data cannot be displayed at the same time.

  Therefore, the receiving terminal 3 in this specific example stores the corresponding data format and codec information, that is, the performance of itself, in the list storage unit 34 as a list in association with the content data. Hereinafter, this list is referred to as a terminal profile.

  The terminal profile indicates whether or not the receiving terminal 3 is compatible with a plurality of pieces of content data (package data) transmitted in the broadcasting system 1. For example, the terminal profile is image data. This represents whether moving image data can be decoded and displayed, still image data can be decoded and displayed, and text data can be decoded and displayed. This is also related to the display method on the display unit, that is, the display performance of the receiving terminal 3.

  FIG. 5 shows a terminal profile of the receiving terminal 3. Here, the data types that can be played back to playback devices such as the speaker 45 and the display unit 41 are shown in association with each other. That is, the receiving terminal 3 is a display unit capable of displaying MPEG moving images and JPEG still images, can be displayed as a single screen, text data only supports the ASCII text format, The terminal profile is compatible with AAC and can reproduce only one sound source.

  On the other hand, in this broadcasting system 1, a package data list of program data transmitted by the data transmission device 2 is as shown in FIG. The codec information of the package data, the name of the content data stored in the package data, and the like correspond to the data ID determined in advance for each data type. This includes data that cannot be received by the receiving terminal 3.

  The package filter 36 in the receiving terminal 3 is controlled by the control unit 46, for example, when the broadcast wave is first received, the terminal profile shown in FIG. 5 and the package data list of program data shown in FIG. In addition, a correspondence table is created and stored in the correspondence table storage unit 35.

  The correspondence table created at this time is shown in FIG. In the correspondence table, the receivable data among the program data is associated with the data ID according to the data format supported by the receiving terminal 3. That is, since the receiving terminal 3 can display MPEG moving images and JPEG still images on the display unit 41, the data IDs of the corresponding package data among the distributed program data are ID1, ID5, and ID7. Since AAC is supported and only one sound source can be reproduced, the data IDs of the corresponding package data are ID2 and ID6. Since the text data is compatible only with the ASCII text format, the data ID of the corresponding package data is Is ID4. Note that the package data (main moving image) with data ID3 and the package data (album music) with ID8 are classified as data that cannot be reproduced. Thus, the receiving terminal 3 in the broadcast system 1 shown as this specific example creates the correspondence table between the terminal profile and the data ID, thereby selecting that the package data corresponding to the data ID cannot be reproduced.

  Therefore, in the broadcasting system 1, the broadcast wave transmitted from the data transmission device 2 passes through the antenna 31, the tuner 32, and the transmission path decoding circuit 33, and the digital signal data converted into a digital signal passes through a package filter 35 described later. At this time, the receivable content data is selected according to the correspondence with the terminal profile. For example, if audio data is selected, the audio data is sent to the audio decoding circuit 41, decoded, and output from the speakers 44L and 44R. If moving image data is selected from a moving image and a still image, package data relating to other video content is discarded, decoded by the moving image decoding circuit 36, and displayed on the display unit 41. At this time, when the receiving terminal 3 can display a plurality of image elements such as moving image data and text data, the display driver uses an image combining method such as OSD (On Screen Display) technology to combine the plurality of image data. Is done.

  In the broadcasting system 1 of this specific example, as described above, among the receivable package data recorded in the correspondence table and the process of storing the package data that can be received according to the function of the receiving terminal 3 as the correspondence table, Further, there is a process of selecting package data to be actually extracted and reproduced by the package filter 36.

  The user can further select package data to be reproduced from the correspondence table shown in FIG. 7 according to the data type and content name that differ depending on the program. For example, package data distributed in a certain program, and the studio scenery is distributed by the package data of data ID1 among the package data receivable by the receiving terminal 3, and the video introducing the artist is displayed by the package data of data ID5. The case where the video of the album jacket is distributed by the package data of the data ID 7 is described.

  In this case, a mode for setting a playback device when the program data shown in FIG. 8 is received can be displayed on the screen (GUI) displayed on the display unit 41 by an operation input from the user in the operation input unit 47. On this screen, the playback device settings specific to the program data can be selected. The user can determine the package data table (referred to as a filter table) actually reproduced as shown in FIG. 9 from the program data distributed as a package data group on this screen. Here, even if the receiving terminal is compatible, it is possible to prevent the package data from being intentionally reproduced by user settings.

  Hereinafter, the package data filtering process in the receiving terminal 3 will be described with reference to FIG.

  As preprocessing (step S1), the receiving terminal 3 associates the terminal profile shown in FIG. 5 with the package data list of program data shown in FIG. Created and stored in the correspondence table storage unit 35. Here, for example, as a method for setting the filter table by a user switching operation to a mode for setting a playback device, the receiving terminal 3 uses the correspondence table to set the data ID shown in FIG. Display the setting screen. At this time, instead of displaying the data ID, a content name, codec information, or the like defined in the data ID correspondence table may be used. When the user selects a data ID on this screen, a filter table is created.

  Next, at step S2, the header of the transmission packet data is received every time the program data is received, and further at step S3, the data ID is obtained from the package data. In step S4, the receiving terminal 3 determines whether or not this data ID is in the filter table.

  In subsequent step S5, the package data listed in the filter table is acquired. The reproduction process of the package data extracted in step S6 is performed. In step S7, it is determined whether or not all the packet data for transmission has been received. If the packet data has been received, the process returns to step S2 and the same processing is performed for the next packet data.

  As described above, in the broadcasting system 1, the package data that the user desires to reproduce among the program data distributed at the broadcasting station can be freely selected within the range allowed by the restrictions of the receiving terminal.

  The present invention is not limited to digital radio broadcasting, but can be applied to any broadcasting system in which a plurality of formats of data are combined and multiplexed on the transmission side. For example, the present invention can be applied to a narrowly defined system such as a home network system, as well as a broadly defined data transmission / reception system such as radio broadcasting, television broadcasting, and so-called content distribution using the Internet.

  At this time, on the transmission side, each data includes a data ID for distinguishing the data. In addition, the receiving side holds a list of data formats corresponding to its own function among the transmitted data. On the receiving side, reproducible data may be selected based on the correspondence between the list and the received data. If the list of data to be received can be updated according to the performance of the receiving terminal and the user's preference from the selected data, the degree of freedom in selecting the content data to be transmitted is further improved.

It is a figure explaining the outline of the broadcasting system shown as a specific example of this invention. It is a block diagram explaining the data transmission apparatus and receiving terminal in the said broadcast system. It is a schematic diagram explaining the data structure of the packet data for transmission transmitted with the said broadcast system. It is a schematic diagram explaining the display allocation of the display part of the receiving terminal in the said broadcast system. It is a figure explaining the terminal profile of a receiving terminal. It is a figure explaining the package data list | wrist of the program data currently transmitted with the data transmitter. FIG. 7 is a diagram for explaining a correspondence table created from the terminal profile shown in FIG. 5 and the package data list of program data shown in FIG. 6. It is a schematic diagram explaining the screen (GUI) displayed on a display part when program data is received. It is a figure explaining the table (filter table) of the package data actually reproduced | regenerated. It is a figure explaining the filtering process of the package data in a receiving terminal.

Explanation of symbols

1 broadcasting system, 2 broadcasting station, 3 receiving terminal,
10 program material, 21 material storage unit, 22 program organization unit,
23 package data generation unit, 24 data ID recording unit, 25 transmission unit 31 antenna, 32 tuner circuit, 33 transmission path decoding circuit,
34 list storage unit, 35 package filter, 36 video decoding circuit,
37 still image decoding circuit, 38 text decoding circuit, 39 display driver,
40 display unit, 41 voice decoding circuit, 42 D / A conversion circuit,
43 amplifiers, 44 speakers

Claims (14)

In a data transmission / reception system that divides and transmits a series of composite data composed of a plurality of content data on the transmission side for each data type, and selects and receives the divided data on the reception side,
Package data generating means for generating package data by adding information for distinguishing each content data and dividing the composite data for each data type;
A data transmission device comprising: package data transmission means for transmitting the generated package data;
Package data receiving means for receiving the package data;
Storage means for storing a list of information about data that can be received by itself;
Received data selection control means for selecting and extracting receivable data stored in the storage means from package data received by the package data receiving means;
A data transmitting / receiving system comprising: a data receiving device comprising: reproducing means for reproducing the content data selected and received. The data receiving device includes a playback content selection unit that further selects content data to be played back by the playback unit from the selected and received content data.
The received data selection control means updates the list stored in the storage means based on the content data selected by the reproduction content selection means, and selects and extracts the content data included in the list. The data transmission / reception system according to claim 1, wherein: The reproduction means in the data receiving device includes display means for displaying moving image and still image data, and audio output means for outputting audio data.
3. The data transmission / reception system according to claim 2, wherein the reproduction content selection means selects the display assignment of the content data in the display means or the assignment of audio output in the audio output means.   The content name is included in the information for distinguishing each content data added by the data transmitting device and the information on the receivable data stored in the data receiving device. Data transmission and reception system.   The information for distinguishing each content data added by the data transmitting device and the information regarding the receivable data stored by the data receiving device include an encoding / decoding format of the content data. The data transmission / reception system according to claim 1. In a data transmission device that divides a series of composite data composed of a plurality of content data into data types and transmits the data to a receiving device,
Package data generating means for generating package data by adding information for distinguishing each content data and dividing the composite data for each data type;
A data transmission device comprising: package data transmission means for transmitting the generated package data.   7. The data transmitting apparatus according to claim 6, wherein the information for distinguishing each added content data includes a content name.   7. The data transmitting apparatus according to claim 6, wherein the information for distinguishing each content data to be added includes a content data encoding / decoding format. In a data receiving apparatus for receiving data divided as package data for each type of data by adding information that distinguishes each content data to a series of composite data composed of a plurality of content data,
Package data receiving means for receiving the package data;
Storage means for storing a list of information about data that can be received by itself;
Received data selection control means for selecting and extracting receivable data stored in the storage means from package data received by the package data receiving means;
A data receiving apparatus comprising: reproducing means for reproducing the content data selected and received. The data receiving device includes a playback content selection unit that further selects content data to be played back by the playback unit from the selected and received content data.
The received data selection control means updates the list stored in the storage means based on the content data selected by the reproduction content selection means, and selects and extracts the content data included in the list. The data receiving device according to claim 9, wherein: The reproduction means in the data receiving device includes display means for displaying moving image and still image data, and audio output means for outputting audio data.
11. The data receiving apparatus according to claim 10, wherein the reproduction content selection unit selects display allocation of the content data on the display unit or audio output allocation on the audio output unit.   10. The data receiving apparatus according to claim 9, wherein the information for distinguishing each content data and the information on receivable data stored in the storage means include a content name.   10. The data receiving apparatus according to claim 9, wherein the information for distinguishing each content data and the information related to receivable data stored in the storage means include an encoding / decoding format of the content data. . In a data transmission / reception method in which a series of composite data composed of a plurality of content data is divided and transmitted for each type of data on the transmission side, and the divided data is selected and received on the reception side.
On the data transmission side
A package data generation step of generating package data by adding information for distinguishing each content data and dividing the composite data into data types;
A package data transmission step of transmitting the generated package data;
On the data receiving side,
A package data receiving step for receiving the package data;
A reception data selection control step of selecting and extracting receivable data stored in the storage means storing a list of information relating to data that can be received from the package data received in the package data reception step;
A data transmission / reception method comprising: a reproduction step of reproducing the content data selected and received.

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