JP2001359061A - Data transmitter, data receiver, data transmission method, and data reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data transmitter that transmits a data broadcast program by utilizing idle and narrow broadcast bands in digital broadcasting and to provide a data receiver that records the received data broadcast program and reproduces the program when recording all of data streams. SOLUTION: The data transmitter generates a 1st data stream that is recorded in a recording medium by the data receiver and a 2nd data stream including audio and video data transmitted as a broadcast program, and transmits the 1st data stream and the 2nd data stream that are multiplexed. The data transmitter controls the transmission rate of the streams such that the transmission rate of the multiplexed data stream is within a maximum transmission rate and the transmission rate of the 1st data stream is smaller than the transmission rate of the 2nd data stream. The data receiver records the 1st data stream to a recording medium, reproduces and uses the data stream after the end of transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmitting apparatus, a data receiving apparatus, a data transmitting method, and a data receiving method which can be used, for example, in digital satellite broadcasting for multiplexing and transmitting a program broadcast and a data broadcast.

[0002]

2. Description of the Related Art Conventional satellite broadcasting is broadcasting using an artificial satellite at a height of 36,000 km, and is broadcasted by a broadcasting satellite (BS).
Some use communication satellites (CS), others use
Both are configured to be able to receive using simple receiving equipment. The satellite broadcasting having such a configuration can cover the whole country with one wave from one transmission point, that is, the geosynchronous orbit position, and can realize the national broadcasting economically and efficiently. Compared to the broadcasting business, it can be easily deployed nationwide, and difficult viewing can be eliminated. As shown in FIG. 16, this one transmission point includes seven transponders each composed of a pair of channels, of which channels 5 and 7 are “WOWO”.
W ”and“ NHK1 ”, and channels 9 and 11
"NHK2" is currently being broadcast.

In such a BS broadcast, as shown in FIG. 17, a data stream including video and audio data is converted into an encoding bit rate in a predetermined broadcast band according to a predetermined transmission rate and multiplexed. M
Generate PEG-TS. The MPEG-TS includes video data V1, audio data A1, data D1, and video data V1.
2, audio data A2, data D2,...

[0004]

However, the satellite broadcasting in the prior art has a problem that the maximum transmission rate is not effectively utilized when multiplexing and transmitting a broadcast program having a plurality of transmission rates. . On the other hand, when trying to transmit at the maximum transmission rate, if a plurality of types of data as described above are multiplexed and transmitted at a random rate, some of the data is required to be imaged on the receiving side. Some data cannot be transmitted in a lump and cannot be visualized in real time.

Accordingly, an object of the present invention is to provide a method of transmitting data by multiplexing a plurality of types of data or transmitting the data in a plurality of bands while effectively utilizing the maximum transmission rate or the maximum bandwidth. It is an object of the present invention to provide a data transmission device, a data reception device, a data transmission method, and a data reception method that can effectively image in real time or non-real time on the side according to data attributes and the like.

[0006]

According to the present invention, there is provided a data transmitting apparatus for generating a first data stream which is stored and used in a recording medium on a receiving side.
A generating unit that generates a second data stream including audio data and video data; a multiplexing unit that multiplexes the first data stream and the second data stream; A transmitting unit for transmitting the multiplexed data stream multiplexed by the multiplexing unit, and a multiplexing unit controlling the multiplexing unit to multiplex the first data stream at a lower transmission rate than the second data data stream. And a control unit that performs the control. Further, in the data receiving apparatus of the present invention, the first data stream stored and used in the recording medium on the receiving side is multiplexed with the second data stream including audio data and video data, and A receiving unit for receiving a multiplexed data stream in which one data stream is multiplexed at a lower transmission rate than a second data stream; and a first data stream of the multiplexed data stream received by the receiving unit. It is characterized by having a separation unit for separating the second data stream, and a recording unit for recording the first data stream separated by the separation unit on a recording medium.

Further, the transmitting apparatus of the present invention transmits a data stream including audio data and video data using a program broadcast band, and converts a data stream stored and used on a recording medium on a receiving side to a data broadcast band. It is characterized by having transmitting means for allocating and transmitting, and control means for controlling so that the sum of the program broadcasting band and the data broadcasting band does not exceed a predetermined bandwidth. In the receiving apparatus of the present invention, a data stream including audio data and video data is transmitted using a program broadcast band, and a data stream stored and used on a recording medium on a receiving side is allocated to the data broadcast band. Receiving means for receiving a broadcast transmitted so that the sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth, and a broadcast allocated to the data broadcast band from the broadcast received by the receiving means. Recording means for recording the data stream.

[0008] Further, according to the data transmission method of the present invention, a first data stream which is stored and used in a recording medium on a receiving side is generated, and a second data stream including audio data and video data is generated. A data transmission method for transmitting a multiplexed data stream obtained by multiplexing the first data stream and the second data stream, wherein the first data stream is lower than the second data data stream. Multiplexing is performed at a transmission rate. Further, in the data receiving method of the present invention, the first data stream stored and used on the recording medium on the receiving side is multiplexed with the second data stream including audio data and video data, and A data receiving method for receiving a multiplexed data stream in which one data stream is multiplexed at a lower transmission rate than a second data stream, the method comprising: receiving a first data stream of the received multiplexed data stream; The second data stream is separated, and the separated first data stream is recorded on a recording medium.

Further, according to the transmission method of the present invention, a data stream including audio data and video data is transmitted using a program broadcasting band, and a data stream stored and used on a recording medium on a receiving side is transmitted to a data broadcasting band. A transmission step of allocating and transmitting, and a control step of controlling so that a sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth. In the receiving method of the present invention, a data stream including audio data and video data is transmitted using a program broadcast band, and a data stream stored and used on a recording medium on a receiving side is allocated to the data broadcast band. Receiving a broadcast in which the sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth, and a broadcast allocated to the data broadcast band from the broadcast received in the receiving step. Recording a recorded data stream.

[0010] In the data transmitting apparatus of the present invention, the first generating section generates a first data stream to be stored and used on a recording medium on the receiving side, and the second generating section generates audio data and video data. Generate a second data stream containing the data. Then, when the generated data streams are multiplexed by the multiplexing unit and transmitted by the transmission unit, the control unit multiplexes the first data stream at a lower transmission rate than the second data data stream. The multiplexing unit is controlled as described above. Therefore, with respect to the preset maximum transmission rate, the second data stream secures a transmission rate capable of real-time display and the like on the receiving side, and is used by being stored on the recording medium on the receiving side. The first data stream is transmitted within a range that does not hinder the transmission of the second data stream. As a result, it is possible to realize data transmission using the maximum transmission rate effectively.

In the data receiving apparatus of the present invention, the receiving section receives a multiplexed data stream of the first data stream and the second data stream, and the separating section receives the first data stream of the multiplexed data stream. And the second data stream. Then, the first data stream is recorded on a recording medium by the recording unit. Therefore, the second transmission rate set to a sufficient transmission rate
Can be used for real-time display and the like. On the other hand, the first data stream multiplexed at a lower transmission rate than the second data stream is stored in a recording medium, and can be used when the required unit of data is stored. As a result, it is possible to realize data transmission using the maximum transmission rate effectively.

In the transmitting apparatus of the present invention, the transmitting means transmits the data stream including the audio data and the video data using the program broadcast band, and stores the data stream used by being stored in the recording medium on the receiving side. The data is allocated to the data broadcasting band and transmitted. At the time of this transmission, the control means controls so that the sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth. Here, a data stream including audio data and video data transmitted in the program broadcasting band is used in real time on the receiving side, and a data stream transmitted in the data broadcasting band is stored and used on the recording medium on the receiving side. . Therefore, two types of data streams can be transmitted using a predetermined bandwidth effectively.

In the receiving apparatus of the present invention, the receiving means receives a data stream including audio data and video data using the program broadcast band and a data stream using the data broadcast band, and the recording means uses the receiving means. And recording a data stream allocated to a data broadcast band from the broadcast received. Therefore, the data stream in the program broadcast band can be used for real-time display and the like, and the data stream in the data broadcast band is stored in a recording medium,
It can be used when the required unit of data is accumulated. As a result, it is possible to realize data transmission using the predetermined bandwidth effectively.

In the data transmission method of the present invention, a first data stream that is stored and used on a recording medium on the receiving side and a second data stream that includes audio data and video data are generated, and these are multiplexed. And send it out. Then, at the time of this multiplexing, the first data stream is multiplexed at a lower transmission rate than the second data data stream. Therefore, with respect to the preset maximum transmission rate, the second data stream secures a transmission rate capable of real-time display and the like on the receiving side, and is used by being stored on the recording medium on the receiving side. The first data stream is transmitted within a range that does not hinder the transmission of the second data stream. This allows
Data transmission utilizing the maximum transmission rate effectively can be realized.

In the data receiving method according to the present invention, a multiplexed data stream of a first data stream and a second data stream is received, and the first data stream and the second data stream are converted from the multiplexed data stream. To separate. Then, the first data stream is recorded on a recording medium. Therefore, the second data stream set to a sufficient transmission rate can be used for real-time display and the like. On the other hand, the first data stream multiplexed at a lower transmission rate than the second data stream is stored in a recording medium, and can be used when the required unit of data is stored. As a result, it is possible to realize data transmission using the maximum transmission rate effectively.

In the transmitting method of the present invention, in the transmitting step, a data stream including audio data and video data is transmitted using a program broadcast band, and a data stream stored and used on a recording medium on a receiving side is used. The data is allocated to the data broadcasting band and transmitted.
At the time of this transmission, in the control step, control is performed so that the sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth. Here, a data stream including audio data and video data transmitted in the program broadcasting band is used in real time on the receiving side, and a data stream transmitted in the data broadcasting band is stored and used on the recording medium on the receiving side. . Therefore, two types of data streams can be transmitted using a predetermined bandwidth effectively.

In the receiving method of the present invention, in the receiving step, a data stream including audio data and video data using the program broadcasting band and a data stream using the data broadcasting band are received. And recording a data stream allocated to a data broadcast band from the broadcast received. Therefore, the data stream in the program broadcast band can be used for real-time display and the like, and the data stream in the data broadcast band can be used when the required unit of data is stored after being stored in the recording medium. As a result, it is possible to realize data transmission using the predetermined bandwidth effectively.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, a specific example of a business management system for satellite broadcasting to which a business management method and a business management device according to an embodiment of the present invention are applied will be described. FIG. 1 is a schematic diagram showing an outline of a satellite broadcast business management system according to the present embodiment. This business management system is, for example, B, a satellite broadcasting company that distributes video contents using satellite broadcasting, which is an existing BS system.
It includes S stations 10A to 10D and a television receiver 11 that can receive and display video contents distributed from the BS stations 10A to 10D. In FIG. 1, the hatched portions of the respective BS stations 10A to 10D are portions for transmitting the data broadcast band. The television receiver 11 is connected to a recording medium for recording BS data broadcasts, in this embodiment, a hard disk 13 having a recording capacity of 36 GB. The 36 GB hard disk 13 has, for example, a transmission rate of 4 Mbps.
In the case of (SD) broadcast, recording for 20 hours is possible.

Further, the present system includes an EC platform 14 for providing the supplied video contents and the information of the company (e-shops) to be opened to the BS station. As shown in FIG. 2, the EC platform 14 includes a media provider 20, a terminal device 21, and a content 2
2. It has a function of organically connecting the radio wave / transmission path 23. The media provider 20 includes an Internet provider, a BS-station, and the like. The terminal device 21 includes the television receiver 11, information devices such as a personal computer, a mobile phone, a wired telephone, and the like. The content 22 covers a wide range of genres such as music, life insurance information, movies, bank information, and broadcast programs. The radio wave / transmission path 23 is configured to cover all of BS data, CS, cables, and the like. In addition, the present system can supplement the 110-degree CS station 19 as needed in the future. In the 110-degree CS station 19, for example, 52
Mbps CS data broadcasting.

The functions of the BS-station 15 include the organization and transmission of storage-type broadcasting, customer authentication, billing and settlement, hard disk distribution and management, customer support, and a network gateway. As shown in FIG. 3, the business form is realized by investment from the broadcaster 25 and the home appliance manufacturer 26. A predetermined band is provided with the broadcaster, and a broadcast band of about 2 Mbps is provided in the embodiment,
Services such as video contents and e-commerce information are provided in the bandwidth of about 2 Mbps. Further, a storage medium for storing BS data provided to consumers at no cost or at a lower cost than the cost is provided to the home appliance manufacturer 26. In this embodiment, a hard disk recording device is provided, and in return, a manufacturer subsidiary is paid. It has become.

Further, on the television receiver side of the viewer, there is a television receiver 11 having a dedicated recording medium (hard disk) capable of receiving and temporarily storing BS data broadcasts or having a separate recording medium. On this recording medium, the BS data broadcast provided by the BS-station can be received and recorded, and the first recorded data can be erased in order to record new data, and the data can be recorded in a FIFO manner. The BS data broadcast received and temporarily stored can be appropriately selected and viewed. Specifically, as shown in FIG.
ation. com "menu screen 11A and selecting from among genres such as" highlights of today, shopping, business / money, sports, travel, entertainment, news / weather forecast, games, living ", etc. The user can access the stored BS data to view desired information. In the case of shopping, it is possible to view and purchase the product. This will be described in detail later.

BS having such functions and business forms
The business model of the station is, as shown in FIG. 4, a technology platform 31 for solving technical aspects, a maker 32 for producing a hard disk-compatible television receiver, and a user 3 for a membership fee.
4. An infrastructure business operator 34 that manages members, an e-commerce company 35 that will be an e-commerce leader, a content provider 36 that provides various contents, and 2M content
and a broadcasting station 30 that transmits the signal on a band around bps.

The technology platform 31 has an HD for storing BS data connected to the television receiver.
In addition to supplying the control technology, encryption technology, authentication / charging technology, and metadata control technology of D to the maker 32, these licenses are given to the BS-station 15, and a license fee is obtained from the maker 32 to achieve a balance. .

In the metadata control technique, a data broadcast flowing using an empty band among broadcast bands of a broadcasting station is converted to H.
This is a control technique for reproducing and using a certain coherent data group when storing the data in the DD. Also,
There are various functions in terms of software, such as extracting and storing data broadcasts according to each user's preference, and preferentially storing information with a high user selectivity.
In addition, when sequentially storing received data broadcasts, the data broadcasts stored on the recording medium are erased in the order of the first stored data broadcast when the storage area is less than or equal to a predetermined capacity or when the storage area is exhausted. It is also possible to control so as to accumulate various data broadcasts.

The manufacturer 32 supplies a television receiver and a hard disk module compatible with a hard disk to a user. Instead of paying a license fee to the technology platform 31, the revenue of the HDD subsidiary and the revenue share from the BS-station 15 are provided. To obtain a balance. User 33
Pays a membership fee for receiving and viewing content, here BS-data from a broadcast station. Infrastructure business 3
Reference numeral 4 designates a service consignment from the BS-station 15 to perform a member management service, a transaction processing service, and a key management service.

The EC store company 35 can obtain an environment in which virtual shopping can be performed in return for paying an EC fee and an advertising fee to the BS-station 15. The content supplier 36 seeks a balance by obtaining a viewing fee from the BS-station 15 side, regardless of the type in various fields, such as video content, music, and the like in this field. The broadcasting station 30 allows the data broadcasting to flow using an allocated broadcasting band, or an empty broadcasting band, for example, 2 Mbps in a broadcasting band of 24 Mbps in the case of BS digital broadcasting. The band varies depending on the broadcast program. For such a broadcasting station, the BS-station 15 aims to make a profit by returning the revenue share in addition to the viewing fee and the band usage fee.

Next, the flow of actual goods and services and the flow of money in the business model of the BS-station having such a configuration will be described with reference to FIGS. As shown in FIG. 5, the flow of goods and services is as follows. (1) The technology platform has a license contract with a device maker, and (2) a license contract with a storage broadcasting company that constructs a BS-station. (3) The equipment maker delivers the equipment to the customer who has applied for data broadcasting. This device is a television receiver having a built-in HDD or a television receiver having an HDD, and is provided with a recording medium capable of storing a data broadcast and software capable of controlling and reproducing the stored data broadcast. ing. In addition, this equipment is provided at no charge or at a low price, and the main purpose is content charges and virtual shopping generated by the use of stored data broadcasting. It has a minimal configuration.

(4) An EC store that provides virtual shopping supplies merchandise and advertisements to the content provider. (5) The content supplier supplies the content to the storage broadcaster. (6) When the storage broadcaster accepts video content or e-commerce content from the content provider, it sends a data broadcast program containing these contents to a broadcast license operator (BS station or broadcast station). (7) Upon receiving the data broadcast from the storage broadcast business, the broadcast license business broadcasts the data broadcast using the free broadcast band of the broadcast program (WOWOW, NHK1, NHK2) flowing in the 24 Mbps broadcast band.

(8) Upon receiving the data broadcast, the equipment on the customer side restores and accumulates the content into one content, and can view desired content by menu operation. The viewed content is sent to the communication carrier as viewing history data. (9) When the communication carrier receives the viewing history data from the customer, the communication carrier transfers the viewing history data of each customer to the infrastructure carrier so as to extract the data broadcast viewed now and in the past. (10) Upon receiving the viewing history data from the telecommunications carrier, the infrastructure provider extracts contents and genres and the like that each customer prefers to view from the viewing history data, generates the data as customer data, and generates the customer data. send. Based on the customer data, the storage broadcaster selects a program with a current high rating or e-commerce, etc., assembles a broadcast program, and sends a data broadcast to a broadcast license operator. By doing so, it is possible to transmit only a data broadcast that meets the needs of the customer, and it is possible to provide content with content.

Next, the flow of money generated in accordance with the flow of goods and services will be described with reference to FIG. First, (1) by viewing a data broadcast between a customer and a storage broadcaster and registering a member for performing virtual shopping by e-commerce included in the data broadcast, a monthly registration is made. A monthly membership fee consisting of fixed costs and an additional service fee (for example, when the usage time is exceeded) are paid to the storage broadcasting company. (2) The storage broadcaster is a device for enabling a customer who has become a member to view a data broadcast, that is,
HDD sub-sidi to a device manufacturer that supplies a customer with a television receiver having a recording medium capable of storing data broadcasting or a device including only a recording medium that can be connected to the television receiver to a customer, and a return to a predetermined profit E
Pay C revenue share. (3) The storage broadcaster pays a content fee commensurate with the content to a content provider that creates video content and content for performing e-commerce.

(4) The storage broadcasting company pays a band usage fee to the broadcasting license company in order to broadcast data broadcasting. (5) The stock broadcasting company pays the service fee and the EC revenue share to be returned to a predetermined profit to the infrastructure company acting as a proxy. (6) The infrastructure provider pays a line fee to the telecommunications carrier. (7) The storage broadcaster pays a license fee to the technology platform. (8) The device manufacturer pays a license fee to the technology platform. (9) E-commerce store buyers will be charged to the content provider
Pay the advertising fee. (10) The EC store pays an EC fee, a store opening fee, and an advertising fee to the storage broadcaster.

Next, a business management method in which the above-mentioned money flow is managed to calculate a profit and the storage broadcast business is appropriately returned to related businesses and users will be described with reference to FIG. 5 and FIG. . The storage broadcaster is required to supply the user with a recording device corresponding to the content provided by the distributor to the user, the fee for use of the content paid by the user, the predetermined service included in the content, And / or a business management device having an input unit to which information on the balance is supplied based on the price obtained for the advertisement and a control unit for controlling the return of the balance to a service or an advertisement fee. Manage the flow of money.

The storage management company can use this business management device to set up a television receiver or HDD with a built-in HDD, which is a recording device corresponding to contents such as virtual stores provided by a device maker as a device distributor to users. The cost required to supply the user with the provided television receiver, and the monthly fee and additional service fee, etc., which are the usage fees of the content provided by the virtual store paid by the user who was supplied with these devices, Calculate the balance from EC sales commissions, exhibition fees, advertisement fees, etc. equivalent to the price obtained for predetermined services or advertisements included in this content, and partly provide services or advertisements according to this profit Control to return to the fee.

For example, in the case where the storage broadcaster controls so as to return a part of it to the equipment (manufacturing) maker of the recording apparatus in accordance with the profit, the recording service corresponding to the content provided by the distributor to the user is provided. Management means for managing the number of devices supplied to the user, and according to the number,
A predetermined amount of money determined by a predetermined service included in the content or a determination unit that determines a price to be paid for the advertisement is returned to the device maker as an EC revenue share. With such a business management device,
The business profit is distributed and managed, and a part of the profit is returned to the EC revenue share of the device (manufacturing) manufacturer of the recording device, the monthly membership fee equivalent to the content usage fee paid by the user, and an additional service fee. It should be noted that such a business management system can be applied not only to satellite broadcasting but also to digital broadcasting in which data broadcasting can be multiplexed.

Next, a transmitting / receiving apparatus and a transmitting / receiving method for multiplexed data according to the present embodiment will be described with reference to FIG.
A digital broadcast transmitting device and a digital broadcast receiving device used on an S digital broadcasting business management system will be described as an example. FIG. 7 is a block diagram showing a configuration of the digital broadcast transmitting device and the digital broadcast receiving (recording) device of the present example. The digital broadcast transmitting device 110 includes at least audio,
And a first data stream generation unit 111 for generating a first data stream including video data, and a second data stream input for receiving a second data stream including audio and video data to be transmitted as a broadcast program Unit 112 and a multiplexer 1 for multiplexing the first data stream and the second data stream
13, an output unit 114 for outputting a multiplexed data stream, and multiplexing control such that the transmission rate of the first data stream is smaller than the encoding bit rate of the first data stream. Multiplexing control unit 11
And 5.

The digital broadcast receiving apparatus 130 includes a first data stream including at least audio and video data created and transmitted by the digital broadcast transmitting apparatus 110, and audio and video data transmitted as a broadcast program. A second data stream is multiplexed and a multiplexed data stream is received such that the transmission rate of the first data stream is lower than the encoding bit rate of the first data stream. Data stream receiving unit 1
31, a data stream separating unit 132 that separates the first data stream and the second data stream received by the data stream receiving unit 131, and a first data stream that records the separated first data stream A recording unit 133 and a first data stream reproducing unit 13 for reproducing the recorded first data stream
4 and a first data stream reproduction control unit 135 that controls the first data stream reproduction unit 134 so that it can be reproduced after the first data stream is completely recorded.

The first data stream generation unit 111
The transmission rate allocated to the first data stream is at least the maximum transmission rate of the first and second data streams, as shown in FIG. Is about 24 Mbps, whereas a transmission rate of about 2 Mbps, which is a considerably narrow band, is allocated. That is, for example, the broadcast band allocated to one broadcaster is 22 Mbps for television broadcast corresponding to the first data stream, data broadcast corresponding to the second data stream, temporary broadcast, and the like, and 2 Mbps for radio and the like.
bps is required and the total is 24 Mbps. Among them, the transmission rate used as the data broadcast corresponding to the first data stream is, as shown in FIG. 9, the case where one broadcaster multiplexes and transmits three TV programs 1, 2, and 3. The remaining transmission rate is about 2 Mbps, and the transmission rate of about 2 Mbps is utilized to the maximum to transmit the data broadcast (first data stream) to the television broadcast (second data stream).
Are multiplexed and transmitted.

Next, a specific configuration of the MPEG encoder of the transmission device 110 for compressing and multiplexing a data broadcast to a television broadcast according to the transmission rate of the data broadcast and transmitting the data broadcast will be described with reference to FIG. The MPEG encoder includes a second data stream input unit 112 for inputting video (video) and audio (audio) data transmitted as a broadcast program of BS digital broadcast, and video (video) data and audio (audio) of data broadcast. A second data stream generator 111 for inputting data,
A multiplexer 113 for multiplexing the first and second data streams, and a multiplexing control unit 115 for controlling the multiplexing
And an output unit 11 for outputting a multiplexed data stream.
4 and an interface 116 corresponding to teletext broadcasting.

The second data stream input unit 112
Video interface 117 for inputting video and audio
a and an audio interface 117b, and a video compressor 118a and an audio compressor 118b for compressing data fetched from the interfaces 117a and 117b. The first data stream generation unit 111 includes a video interface 117c and an audio interface 117d for inputting video and audio, and includes a video compressor 118c and an audio compressor 118d for compressing data captured from the interfaces 117c and 117d. It has become.

The multiplexer 113 includes a primary multiplexer 113a and a secondary multiplexer 11
3b, and the primary multiplexer 113
a multiplexes the compressed data broadcast, that is, the first data stream. Here, the multiplexing control of the first data stream is performed at a coding rate of 4 Mbps in the embodiment. On the other hand, the secondary multiplexer 113b
Is 4 Mbps for the second data stream (television broadcast)
The transmission rate of the first data stream (data broadcast) having the coding rate of about 2 Mbps is multiplexed. This control is performed by the multiplexing control unit 115,
Is controlled so as to multiplex the data stream at a coding rate of 4 Mbps to a transmission rate of 2 Mbps. That is, the first data stream is originally 4 Mb
Despite the coding rate of ps, multiplexing control is performed so as to be 2 Mbps, which is smaller than that, so calculation on the time axis is twice as slow. In this way, the first data stream (data broadcast) can be transmitted after being multiplexed to the secured narrow band transmission rate.

Next, a specific configuration of a receiving apparatus that receives such first and second data streams that are MEPEG-encoded and multiplexed will be described with reference to FIG. This receiving device is configured as a hard disk recorder, and separates from an antenna to receive a second data stream (television broadcast), a second data stream receiving unit 131a, and a first data stream (data broadcast). ), A first data stream reproduction control unit 125, a first data stream recording unit 133, and a first data stream reproduction unit 134 via a system bus B. It is configured to be connected to

Second data stream receiving section 131a
Is a tuner 135a capable of receiving a second data stream (television broadcast), and a tuner 135a.
digital demodulation circuit 136a for demodulating the signal received at a
And an error correction circuit 137a for correcting an error. The demodulated video and audio data of the data broadcast are demultiplexed by the demultiplexer 138.
Television receiver TV supplied to system bus B as appropriate
Can be output to The first data stream receiving unit 131b includes a tuner 135b capable of receiving a first data stream (data broadcast) having a transmission rate of about 2 Mbps, and a digital demodulation circuit 136b for demodulating a signal received by the tuner 135b. And an error correction circuit 137b for correcting an error. The demodulated first data stream (data broadcast) is recorded in the first stream recording unit 133.
The first data stream recording unit 133 includes a hard disk HDD having a recording capacity of about 38 GB, and controls to record only the first data stream (data broadcast). Note that the recording capacity of the hard disk is not limited to 38 GB, and can be changed as appropriate, and when the recording capacity is 38 GB, the transmission rate is 4M.
In the case of bps, recording for about 20 hours is possible. This hard disk HDD may be built in or external to the television receiver TV.

The first data stream recording unit 13
3 controls to preferentially record the first data stream of the genre (field) frequently viewed, or controls to preferentially record the first data stream of the genre specified in advance. It has a function to do. For example, by statistically processing a user's viewing history, a genre having a high viewing frequency is periodically determined, and the first data stream of the genre is preferentially recorded according to the determination result. it can. Alternatively, the mode setting allows the user to select a favorite genre,
According to the selection result, the first data stream of the genre can be preferentially recorded. The genre used here is, for example, a classification regarding program contents such as “movie”, “music”, “sports”, “news”, and “document”, and, for example, “clothing”, “food”, “event”
For example, a classification or the like relating to a product attribute of electronic commerce can be used.

First data stream reproduction control unit 125
Is composed of an arithmetic processing unit CPU, and controls the first data stream reproducing unit 134 so that the first data stream (data broadcast) can be reproduced after all the data streams have been recorded. The first data stream playback unit 134
PEG decoder 134a and OSD (On Screen)
Display 134b), and outputs video and audio data of the first data stream (data broadcast) to the television receiver TV. In this way, the first data stream (data broadcast) transmitted from the transmission device at an extremely narrow band transmission rate is recorded on the hard disk which is a recording medium, and when all the data streams have been recorded, , It is possible to reproduce at a very high speed even if the transmitted speed is low.

Next, another example of the receiving apparatus will be described with reference to FIG. This receiving apparatus is configured as a hard disk recorder provided with primary and secondary charging (CAS) functions. In the following description, in addition to the configuration and operation of the hard disk recorder side, an operation procedure on the user side is referred to. I do. First, the hard disk recorder receives a digital broadcast signal by an external satellite antenna, and converts the intermediate frequency signal converted by the satellite antenna converter into a digital tuner 211 of the data stream receiving units 210a and 210b of the front end unit.
a, 211b. Digital tuner 211
a and 211b convert the input intermediate frequency signal into a baseband signal, and convert them into digital demodulation circuits 212a and 212b.
b. Digital demodulation circuits 212a, 212b
Demodulates the input signal and outputs an error correction circuit 213
a and 213b. Error correction circuit 213a, 2
13b corrects errors in demodulated data input from the digital demodulation circuits 212a and 212b and outputs the errors to the demultiplexers 221a and 221b. Demultiplexer 2
21a and 221b select a stream based on a user's instruction from one input transmission channel, and output it to the primary CAS units 222a and 222b.

The primary CAS units 222a and 222b are IC
Based on the key stored in the IC card 224 attached to the card interface 223, the stream supplied from the demultiplexers 221a and 221b is decrypted (descrambled), and if recording is instructed, Is supplied to the hard disk drive 226 via the system bus 225 for recording. When the viewing is instructed in real time, the primary CAS unit 2
The outputs of 22a and 222b are supplied to the secondary CAS unit 227. The secondary CAS unit 227 accesses a predetermined server via a key (public key) stored in advance or a portable module 228, and encrypts the input stream based on the obtained key (public key). If the encryption is performed, the encryption is decrypted (descrambled) and output to the MPEG decoder 229.

The MPEG decoder 229 decodes the input stream according to the MPEG system, and
D (On Screen Display) circuit 230
And multiplexes images and characters based on predetermined OSD data, and then outputs to a display device for display. The audio signal output from the MPEG decoder 229 is output to a speaker or the like. When a plurality of digital tuners are mounted, it is possible to simultaneously record different channels or different streams in the above processing. The CPU 231 controls the operation of each unit described above in accordance with a user's instruction. Flash memory 23
Various data and programs are stored in 2 as needed.

When a user enters an EPG (Electronic
When viewing / recording is instructed by using a program guide (Program Guide), information that can specify a program such as a broadcast station identifier or a program identifier included in the EPG data and SIT (Selection I) transmitted together with the stream are provided.
It determines the match with data such as a network identification descriptor, a partial transport stream time descriptor, a broadcast ID descriptor, etc. in an N.formation Table, and determines a PID (Packet Id) of a necessary stream.
By supplying the entifier to the demultiplexer circuit, filtering becomes possible.

If the received stream is to be charged, ECM (E) transmitted together with the video / audio stream
title Control Message
e) and EMM (Entitlement Manag)
element Message) to determine whether the stream requires charging. Then, in the case of the charging process of only the primary CAS, the data necessary for the ECM and the EMM is transferred to the IC via the IC card interface circuit.
Output to the card, obtain key information based on the result processed inside the IC card, and perform descrambling by the primary CAS circuit.

When ordering goods and services from the television screen, the CPU changes the telephone number of the server to be connected to the server in advance stored in a flash memory or the like in accordance with the selection of the goods and services operated by the user. Read out and instruct connection to the portable module. The mobile module is
According to the connection instruction, a call is made to the telephone number of the connection destination. Waits for a connection response from the connection destination server, and when the connection is confirmed,
Information about the selected physical distribution and service is acquired from the server and displayed on the display device as needed. When the user performs a purchase operation, the CPU transmits a purchase procedure instruction to the server. In response to a request from the server, data such as a device unique number and a user identification number are transmitted for user authentication. When the purchase procedure is completed from the server and the accompanying information is transmitted, the information is displayed on the display device as needed, and the connected portable module is disconnected after the end operation of the user. CPU
Is used to store information such as a purchase history in a flash memory or the like, and use the information at a later date to display a list of purchase history at the request of the user.

Next, the operation of reproducing the first data stream stored by the hard disk recorder as described above will be described with reference to the schematic views of the display screens shown in FIGS. First, when the content reproduced on the hard disk is reproduced, when goods and services can be purchased, for example, as shown in FIG.
11 and 312 are presented to prompt the purchase operation. When the viewer intentionally presses the operation button for purchasing (for example, clicks an icon), as shown in FIG. 14, detailed information on goods and services (in the example screen shown in FIG. A window 320 (showing a display example) is displayed.

The user can enter the input frames 321 such as the purchase quantity and the settlement method along the screen in the window 320.
An input is made to 322 and a purchase action is performed by selecting a “purchase decision” button 323. Alternatively, the purchase action is stopped by selecting a “cancel” button 324. Further, when the “purchase decision” button 323 is selected, the settlement processing with the bank and the credit company is performed in accordance with the method specified by the settlement method (for example, bank account transfer, credit card, etc.). After the settlement process is completed, an order for goods, services, etc. is made, inventory is checked, information on the delivery date is obtained from the sales company / distributor, and the result is displayed on the screen 300 as shown in FIG. It is displayed in a window 330. After this, an "end" button 33
By selecting 1, the purchase process ends. In addition,
These buttons are four color keys for data broadcasting (blue, red,
(Yellow, green) button display may be used.

Although the specific examples of the present invention have been described above, the present invention is not limited to the above examples, and can be further modified. For example, in the above example, the case where the first and second data streams are multiplexed and transmitted has been described.
Even for a system in which the same data stream is allocated to the program broadcast band and the data broadcast band and transmitted, the transmission side controls the sum of the program broadcast band and the data broadcast band so as not to exceed a predetermined bandwidth, and By recording the data stream in the data broadcast band on the hard disk and using the same, the same effect can be obtained. Further, the recording medium is not limited to a hard disk, but may be a medium using another medium.

[0054]

As described above, in the data transmitting apparatus of the present invention, the first data stored and used on the recording medium on the receiving side is used.
Generating a second data stream including audio data and video data, multiplexing these data streams by a multiplexer,
Upon transmission, the first data stream is multiplexed at a lower transmission rate than the second data stream. Therefore, with respect to the preset maximum transmission rate, the second data stream secures a transmission rate capable of real-time display and the like on the receiving side, and is used by being stored on the recording medium on the receiving side. By transmitting the first data stream within a range that does not hinder the transmission of the second data stream, there is an effect that data transmission using the maximum transmission rate effectively can be realized.

Further, the data receiving apparatus of the present invention receives the multiplexed data stream of the first data stream and the second data stream, and separates the first data stream and the second data stream of the multiplexed data stream. Then, the first data stream is recorded on the recording medium by the recording unit. Therefore, the second data stream set to a sufficient transmission rate can be used for display or the like in real time, and the first data stream multiplexed at a lower transmission rate than the second data stream can be used. After the data is stored in the recording medium, the data can be used at the time when the required unit of data is stored, so that there is an effect that the data can be transmitted by effectively utilizing the maximum transmission rate.

In the transmission apparatus of the present invention, a data stream including audio data and video data is transmitted using a program broadcast band, and a data stream stored and used on a recording medium on the receiving side is converted to a data broadcast band. Allocated and transmitted, and at the time of transmission, control is performed so that the sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth. Therefore, the data stream including the audio data and the video data transmitted in the program broadcasting band can be used in real time on the receiving side, and the data stream transmitted in the data broadcasting band can be stored in the recording medium and used on the receiving side. There is an effect that two types of data streams can be transmitted by effectively using a predetermined bandwidth.

Further, the receiving apparatus of the present invention receives a data stream including audio data and video data using the program broadcast band and a data stream using the data broadcast band, and converts the received broadcast to the data broadcast band. Recorded the assigned data stream. Therefore, the data stream of the program broadcast band can be used for display or the like in real time,
After the data stream of the data broadcast band is stored in the recording medium, it can be used at the time when the required unit of data is stored, so that there is an effect that transmission of data that effectively utilizes a predetermined bandwidth can be realized. .

In the data transmission method of the present invention, a first data stream that is stored and used on a recording medium on the receiving side and a second data stream that includes audio data and video data are generated, and these are multiplexed. And transmit the data stream. In this multiplexing, the first data stream is
The data stream is multiplexed at a lower transmission rate than the data stream. Therefore, with respect to the preset maximum transmission rate, the second data stream secures a transmission rate capable of real-time display and the like on the receiving side, and is used by being stored on the recording medium on the receiving side. Since the first data stream can be transmitted within a range that does not hinder the transmission of the second data stream, there is an effect that data transmission using the maximum transmission rate effectively can be realized.

In the data receiving method of the present invention, a multiplexed data stream of the first data stream and the second data stream is received, and the first data stream and the second data stream are converted from the multiplexed data stream. The data stream is separated, and the first data stream is recorded on a recording medium. Therefore, the second data stream set to a sufficient transmission rate can be used for display and the like in real time, and the first data stream multiplexed at a lower transmission rate than the second data stream can be used. After the data is stored in the recording medium, the data can be used when the required unit of data is stored, and there is an effect that data transmission can be realized by effectively utilizing the maximum transmission rate.

According to the transmission method of the present invention, a data stream including audio data and video data is transmitted using a program broadcast band, and a data stream stored and used on a recording medium on a receiving side is converted to a data broadcast band. Allocated and transmitted, and the transmission is controlled so that the sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth. Therefore, the data stream including the audio data and the video data transmitted in the program broadcast band can be used in real time on the receiving side, and the data stream transmitted in the data broadcasting band can be stored in the recording medium and used on the receiving side. There is an effect that two types of data streams can be transmitted by effectively using a predetermined bandwidth.

Further, in the receiving method of the present invention, a data stream including audio data and video data using a program broadcast band and a data stream using a data broadcast band are received, and the received broadcast is converted to a data broadcast band. Record the assigned data stream.
Therefore, the data stream of the program broadcast band can be used for real-time display or the like, and the data stream of the data broadcast band can be used when the required unit of data is stored after being stored in the recording medium. There is an effect that data transmission using a predetermined bandwidth effectively can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing a structure of a BS-station for constructing a satellite broadcasting system used in an embodiment of the present invention.

FIG. 2 is a schematic conceptual diagram of an EC platform showing a state in which a content, a radio wave / transmission path, a provider, and a terminal are organically connected with the BS-station shown in FIG. 1 as a part.

FIG. 3 is an explanatory diagram showing functions and a business structure of the BS-station shown in FIG. 1;

FIG. 4 is a schematic conceptual diagram showing a business model of the BS-station shown in FIG. 1;

FIG. 5 is a block diagram showing a flow of goods and services in the BS-station shown in FIG. 1;

FIG. 6 is a block diagram showing a flow of money in the BS-station shown in FIG. 1;

FIG. 7 is a configuration diagram schematically showing a digital broadcast transmitting device and a digital broadcast receiving device according to an embodiment of the present invention.

8 is a conceptual diagram showing an example of a broadcast band assigned to one broadcaster in the embodiment shown in FIG. 7;

9 is a conceptual diagram showing allocation of transmission rates in the BS digital broadcast shown in FIG.

10 is an MPE in the digital transmission device shown in FIG.
It is a block diagram which shows the example of a structure of a G decoder part.

11 is a block diagram illustrating a configuration example of a recording / reproducing unit in the digital receiving device illustrated in FIG.

12 is a block diagram illustrating another configuration example of the recording / reproducing unit in the digital receiving device illustrated in FIG.

13 is a block diagram showing a specific example of a moving image display screen in the digital receiving device shown in FIG.

14 is a block diagram showing a specific example of a product order screen in the digital receiving device shown in FIG.

FIG. 15 is a block diagram showing a specific example of a product purchase confirmation screen in the digital receiving device shown in FIG. 7;

FIG. 16 is an explanatory diagram schematically showing the configuration of an MPEG-TS.

FIG. 17 is an explanatory diagram showing a mechanism of a transponder of an artificial satellite in satellite broadcasting.

[Explanation of symbols]

10A to 10D: broadcasting station (BS station), 11: television receiver, 12: remote controller, 13: hard disk, 14: cross-media EC platform,
15 ... BS-station, 16 ... Video contents, 17 ... E-shops, 18 ... Internet, 19 ... 110 degree CS station, 20 ... Media provider, 21 ... Terminal equipment, 22 …… Contents, 26 …… Household appliances manufacturers, 30 …… Broadcasters, 31…
… Technology platform, 32… maker,
33 ... User, 34 ... Infrastructure operator, 35 ...
EC store opening company, 36 ... Content supplier, 110 ...
Digital broadcast transmitting device, 111 first data stream generating unit, 112 second data stream input unit, 113 multiplexer, 113a primary multiplexer, 113b secondary multiplexer, 114 output unit , 115... Multiplexing control unit, 1
16 Data interface 117a Video interface 117b Audio interface 117c Video interface 117
d Audio interface, 118a Video compressor, 118b Audio compressor, 118c Video compressor, 118d Audio compressor, 130 Data receiving device, 1
31 data stream receiving section, 131a second data stream receiving section, 132 data stream separating section, 133 first data stream recording section, 1
34 first data stream reproducing unit 135 135 first data stream reproducing control unit 135a tuner 135b tuner 136a digital demodulation circuit 136b digital demodulation circuit 137a Error correction circuit, 137b ... Error correction circuit, 138 ...
... Demultiplexer.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H04N 5/44 H04N 5/76 Z 5/445 7/08 Z 5/76 (72) Inventor Ryuichiro Hisamatsu Tokyo 6-7-35 Kita-Shinagawa, Shinagawa-ku, Sony Corporation (72) Inside the inventor Saito Had 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) The inventor Masaru Sakai Shinagawa, Tokyo 6-7-35 Kita-Shinagawa-ku, Sony Corporation (72) Inventor Hironari Okamoto 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5C025 AA28 AA29 BA25 BA27 BA28 CA09 CB09 CB10 DA01 DA04 DA05 5C052 AA01 AB03 AB04 CC06 CC11 DD04 EE03 5C063 AB03 AB07 AC01 AC05 AC10 CA11 CA23 CA36 DA01 DA05 DA07 DA13 5D044 AB03 AB05 AB07 BC01 CC05 DE49 EF02 EF05 HL11 5K061 AA13 BB07 BB07 BB07

Claims (34)

[Claims] 1. A first generation unit that generates a first data stream that is stored and used on a recording medium on a receiving side, and a second generation unit that generates a second data stream including audio data and video data. A generating unit; a multiplexing unit that multiplexes the first data stream and the second data stream; a transmitting unit that transmits a multiplexed data stream multiplexed by the multiplexing unit; A data transmission device, comprising: a control unit that controls a multiplexing unit so as to multiplex a data stream at a lower transmission rate than a second data data stream. 2. The data transmission device according to claim 1, wherein the first data stream includes data relating to electronic commerce. 3. The data transmitting apparatus according to claim 1, wherein the first data stream includes audio data and video data. 4. The method according to claim 1, wherein a maximum transmission rate of the multiplexed data stream is 24 Mbps.
The data transmission device according to the above. 5. The data transmission device according to claim 4, wherein the transmission rate of the first data stream is about 2 Mbps. 6. A first data stream stored and used on a recording medium at a receiving side and a second data stream including audio data and video data are multiplexed, and the first data stream is multiplexed. Receiving a multiplexed data stream multiplexed at a lower transmission rate than the second data stream; and a first data stream and a second data stream of the multiplexed data stream received by the receiver. A data receiving apparatus, comprising: a separating unit that separates a stream; and a recording unit that records a first data stream separated by the separating unit on a recording medium. 7. The data receiving apparatus according to claim 6, wherein the first data stream includes data relating to electronic commerce. 8. The data receiving apparatus according to claim 6, wherein said first data stream includes audio data and video data. 9. The method according to claim 6, wherein a maximum transmission rate of the multiplexed data stream is 24 Mbps.
The data receiving device according to the above. 10. The transmission rate of the first data stream is about 2 Mbps.
The data receiving device according to the above. 11. The data receiving apparatus according to claim 6, wherein the recording unit preferentially records the first data stream in a field where the user frequently views. 12. The data receiving apparatus according to claim 6, wherein said recording unit preferentially records a first data stream in a predetermined field. 13. The data receiving apparatus according to claim 6, wherein said recording unit includes a hard disk as a recording medium. 14. The recording unit according to claim 6, wherein the recording unit has an output unit for visually outputting a viewing history of the user.
The data receiving device according to the above. 15. A transmitting means for transmitting a data stream including audio data and video data using a program broadcast band, and allocating a data stream used on a recording medium to be used on a receiving medium to the data broadcast band and transmitting the data stream. And a control means for controlling the sum of the program broadcast band and the data broadcast band so as not to exceed a predetermined bandwidth. 16. The transmitting apparatus according to claim 15, wherein a sum of the program broadcast band and the data broadcast band is 24 Mbps. 17. A data stream including audio data and video data is transmitted using a program broadcast band, and a data stream stored and used on a recording medium on a receiving side is allocated to the data broadcast band and transmitted. Receiving means for receiving a broadcast whose total sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth; and a data stream allocated to the data broadcast band from the broadcast received by the receiving means. And a recording means for recording the information. 18. The receiving apparatus according to claim 17, wherein a sum of the program broadcast band and the data broadcast band is 24 Mbps. 19. A receiving side generates a first data stream that is stored and used on a recording medium, generates a second data stream including audio data and video data, and further generates the first data stream. A data transmission method for transmitting a multiplexed data stream obtained by multiplexing a first data stream and a second data stream, wherein the first data stream is multiplexed at a lower transmission rate than a second data data stream. A data transmission method, characterized in that: 20. The system of claim 1, wherein the first data stream includes data relating to electronic commerce.
9. The data transmission method according to item 9. 21. The data transmission method according to claim 19, wherein said first data stream includes audio data and video data. 22. The data transmission method according to claim 19, wherein a maximum transmission rate of said multiplexed data stream is 24 Mbps. 23. The transmission rate of the first data stream is about 2 Mbps.
2. The data transmission method described in 2. 24. A first data stream that is stored and used on a recording medium on a receiving side and a second data stream that includes audio data and video data, and the first data stream is multiplexed. Is a data receiving method for receiving a multiplexed data stream multiplexed at a lower transmission rate than a second data stream, wherein the first data stream and the second data stream of the received multiplexed data stream are A data receiving method, comprising separating a stream and recording the separated first data stream on a recording medium. 25. The system of claim 2, wherein the first data stream includes data relating to electronic commerce.
4. The data receiving method according to 4. 26. The data receiving method according to claim 24, wherein the first data stream includes audio data and video data. 27. The data receiving method according to claim 24, wherein a maximum transmission rate of said multiplexed data stream is 24 Mbps. 28. The transmission rate of the first data stream is about 2 Mbps.
7. The data receiving method according to 7. 29. The data receiving method according to claim 24, wherein the recording on the recording medium is performed by preferentially recording the first data stream in a field where the user frequently views. 30. The data receiving method according to claim 24, wherein the recording on the recording medium is performed by preferentially recording a first data stream in a predetermined field. 31. A transmitting step of transmitting a data stream including audio data and video data using a program broadcast band, and allocating a data stream to be used on a recording medium to be used on a receiving medium to the data broadcast band and transmitting the data stream. And a control step of controlling the sum of the program broadcast band and the data broadcast band so as not to exceed a predetermined bandwidth. 32. The transmission method according to claim 31, wherein the sum of the program broadcast band and the data broadcast band is 24 Mbps. 33. A data stream including audio data and video data is transmitted using a program broadcast band, and a data stream stored and used on a recording medium on a receiving side is allocated to the data broadcast band and transmitted. Receiving a broadcast in which the sum of the program broadcast band and the data broadcast band does not exceed a predetermined bandwidth; and a data stream allocated to the data broadcast band from the broadcast received in the receiving step. A recording step of recording the following. 34. The receiving method according to claim 33, wherein the sum of the program broadcast band and the data broadcast band is 24 Mbps.