CN101822009A - Method and device for broadcast data transmission, method and device for broadcast data reception - Google Patents

Abstract

Provided are a method and apparatus for transmitting broadcast data and a method and apparatus for receiving broadcast data so as to provide a broadcast service. The method of transmitting broadcast data includes: receiving at least one Internet Protocol (IP) packet group, the IP packet group classified based on a service provided by IP packets; generating first mapping information which indicates mapping information between an IP address corresponding to each of the at least one IP packet and an address within a transmission channel on which each of the at least one IP packet group is to be carried; and transmitting the first mapping information and the at least one IP packet group via the transmission channel. A user accesses only desired IP packets quickly and processes them so that a data processing speed can be improved.

Description

Method and device for broadcast data transmission, method and device for broadcast data reception

technical field

The present invention relates to a method and device for sending broadcast data and a method and device for receiving broadcast data, more particularly, to a method and device for sending broadcast data and a method and device for receiving broadcast data, so as to provide Consortium-Broadcast (OMA-BCAST) standard broadcast service.

Background technique

Recently, digital broadcasting that provides various additional data services such as weather, traffic, entertainment, and images, and high-quality audio services corresponding to the sound quality of compact discs (CDs) has become widely popular. In particular, broadcasting technology using digital broadcasting with mobile devices has been paid attention to.

An 8-level general sideband (VSB) transmission system for digital broadcasting is defined in the Advanced Television Systems Committee (ATSC), and the advanced vestigial sideband (VSB) system is used as a higher-level format of the 8-VSB. In the 8-VSB transmission system, image signals are compressed according to the MPEG-2 standard, and voice signals are compressed according to the AC-3 standard, using 8-step modulation signal levels and common sideband modulation techniques. In this method, 18 signal formats are variously used. Thus, broadcasts of several channels can be transmitted simultaneously.

Meanwhile, due to the development of digital transmission technology, a broadcast communication convergence service that provides broadcast service and communication service by using the same terminal unit is being paid attention to. In the Open Mobile Alliance-Broadcast (OMA-BCAST) standard, content is provided to terminals through Internet Protocol (IP)-based packets, and the provided content can be transmitted via a communication network as well as via a broadcast network.

However, in the case of transmitting a packet via a broadcast network, the location of the packet to be obtained cannot be easily searched. Accordingly, a conventional device for receiving broadcast data receives all packets, and then extracts a desired packet from the received packets by using header information of the packets or the like. Therefore, it is very inconvenient to use a conventional device for receiving broadcast data in a broadcast system in which the location of desired data must be quickly determined and processed.

Specifically, a Service Guide (SG) for providing additional information related to broadcast services such as Electronic Program Guide (EPG) and an SG Announcement for providing metadata about the SG are defined in the OMA-BCAST standard . A packet including an SG announcement and a packet including an SG must be sequentially processed so that a desired broadcast service can be efficiently provided to a user. However, in a conventional broadcast system in which the location of a desired packet cannot be easily determined, it is very inconvenient to provide users with a broadcast service according to the OMA-BCAST standard.

Contents of the invention

technical problem

It is very inconvenient to provide broadcasting services to users according to the OMA-BCAST standard.

Technical solutions

The present invention provides a method and apparatus for efficiently providing Internet Protocol (IP) services in an Advanced Television Systems Committee (ATSC) transmission system.

Beneficial effect

In the method and device for transmitting broadcast data and the method and device for receiving broadcast data according to an exemplary embodiment of the present invention, the first mapping information is provided, and the user can quickly access only desired IP packet groups, and It is processed so that the data processing speed can be increased.

In addition, a broadcast service according to the OMA-BCAST standard is provided so that the range using the A-VSB transmission system is expanded.

Furthermore, combined and additional information is provided so that the combined and additional information can be effectively transmitted to the user.

In addition, the first mapping information and the second mapping information are used so that the SG according to the OMA-BCAST standard can be efficiently acquired.

Description of drawings

The above and other features and advantages of the present invention will become more apparent from the detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, in which:

1 shows a protocol stack for providing an Advanced Vestigial Sideband (A-VSB) transmission system for Internet Protocol (IP) services according to an exemplary embodiment of the present invention;

Fig. 2 shows the syntax of IP mapping table (IMT) according to the exemplary embodiment of the present invention;

FIG. 3 illustrates a method of providing a broadcast service according to an exemplary embodiment of the present invention;

4 illustrates a method of providing a broadcast service based on the Open Mobile Alliance-Broadcast (OMA-BCAST) standard according to an exemplary embodiment of the present invention;

FIG. 5 shows acquisition of a service guide (SG) based on the OMA-BCAST standard according to an exemplary embodiment of the present invention;

FIG. 6 shows an apparatus for transmitting broadcast data according to an exemplary embodiment of the present invention;

FIG. 7 illustrates an apparatus for receiving broadcast data according to an exemplary embodiment of the present invention;

FIG. 8 shows a detailed structure of the IP packet group acquisition unit of FIG. 7 according to an exemplary embodiment of the present invention;

FIG. 9 is a flowchart illustrating a method of transmitting broadcast data according to an exemplary embodiment of the present invention; and

FIG. 10 is a flowchart illustrating a method of receiving broadcast data according to an exemplary embodiment of the present invention.

best practice

According to an aspect of the present invention, there is provided a method of transmitting broadcast data, the method provides a broadcast service by using IP (Internet Protocol) packets, the method includes: receiving at least one IP packet group, based on Serving to divide the IP packet group; generating first mapping information, the first mapping information indicates the IP address corresponding to each of the at least one IP packet group and will carry each of the at least one IP packet group mapping information between addresses in a transmission channel; and sending the first mapping information and the at least one IP packet group via the transmission channel.

The transmission channel may be a channel for transmitting data in an Advanced Vestigial Sideband (A-VSB) system.

The transmission channel may be a data transmission channel for transmitting data, and at least one IP packet group to be transmitted through the data transmission channel may include an additional information IP packet group for providing additional information related to the broadcast service and an IP packet group for providing additional information related to the broadcast service. The additional information is metadata about at least one of the IP packet groups.

The method may further include: generating second mapping information indicating mapping information between an IP address corresponding to the metadata IP packet group and a data transmission channel that will carry the metadata IP packet group; The signaling information transmission channel used to transmit signaling information is used to transmit and receive broadcast data to transmit the second mapping information, wherein the signaling information is information required for transmitting and receiving broadcast data.

The method may further include: sending a first additional information IP packet group and a second additional information IP packet group, wherein the first additional information IP packet group includes information related to the first broadcast service provided via the first data transmission channel. additional information, the second additional information IP packet group contains additional information related to the second broadcast service provided via the second transmission channel and the combination and additional information transmission channel for transmission and Combined and additional information about broadcasting services.

The additional information IP packet set can provide a Service Guide (SG) according to the Open Mobile Alliance-Broadcast (OMA BCAST) standard, and the metadata IP packet set can provide an SG announcement according to the OMA BCAST standard.

The transmission channel may include at least one sub-data channel that will carry at least one IP packet, and the address within the data transmission channel is a location mapping table that indicates the location of each sub-data channel that will carry the at least one IP packet group ( LMT) index number.

According to another aspect of the present invention, there is provided a method of receiving broadcast data, the method provides a broadcast service by using an IP (Internet Protocol) packet, the method includes: acquiring first mapping information from a transmission channel, the second Mapping information indicating mapping information between an IP address corresponding to each of the at least one IP packet group and an address within a transmission channel that will carry each of the at least one IP packet group, wherein based on the IP address provided by the IP packet service to divide the at least one IP packet group; and selectively acquire a desired IP packet group from the at least one IP packet group based on first mapping information.

The transmission channel may be a channel used to transmit data within an Advanced Vestigial Sideband (A-VSB) system.

The transmission channel may be a data transmission channel for transmitting data, and at least one IP packet group to be transmitted through the data transmission channel may include an additional information IP packet group for providing additional information related to the broadcast service and an IP packet group for providing additional information related to the broadcast service. The additional information is metadata about at least one of the IP packet groups.

The step of selectively obtaining the IP packet group may include: obtaining the metadata IP packet group from the data transmission channel by using the first mapping information; processing the obtained metadata IP packet group to obtain an IP address corresponding to the additional information IP packet group ; and obtaining the additional information IP packet group from the data transmission channel by using the first mapping information and the obtained IP address.

The at least one IP packet group transmitted through the data transmission channel may include at least one data IP packet group for providing broadcast services, and the step of selectively obtaining the IP packet group may include: processing the obtained additional information IP packet group to acquiring an IP address corresponding to the data IP packet group; and selectively acquiring a desired data packet group from the at least one data packet group by using the first mapping information and the IP address corresponding to the data IP packet group.

The method may further include acquiring second mapping information indicating mapping information between an IP address corresponding to the metadata IP packet group and a data transmission channel from a signaling transmission channel used to transmit signaling information, the signaling The information is information required to transmit and receive broadcast data; and acquiring a data transmission channel carrying metadata IP packet groups based on the second mapping information, wherein the step of acquiring the first mapping information includes: from a predetermined position of the accessed data transmission channel Obtain first mapping information.

The additional information IP packet group can provide the SG according to the Open Mobile Alliance-Broadcast (OMA BCAST) standard, and the metadata IP packet group can provide the SG announcement according to the OMA BCAST standard.

The transmission channel may be a combined and additional information transmission channel for transmitting combined and additional information related to broadcast services, and at least one IP packet group to be transmitted via the combined and additional information transmission channel may include a first additional information IP packet group and a second additional information IP packet group, the first additional information IP packet group contains additional information related to the first broadcast service provided via the first data transmission channel, and the second additional information IP packet group contains information related to the first broadcast service provided via the first data transmission channel. Additional information related to the second broadcast service provided by the second data transmission channel.

The transport channel may comprise at least one sub-data channel carrying at least one IP packet, the address within the data transport channel being an LMT index number indicating the location of the sub-data channel that will carry each of the at least one IP packet group.

According to another aspect of the present invention, there is provided a device for sending broadcast data, the device provides a broadcast service by using IP (Internet Protocol) packets, the device includes: a receiving unit, receiving at least one IP packet group, based on The service provided by the IP packet is used to divide the IP packet group; the first mapping information generating unit generates first mapping information, and the first mapping information indicates the IP address corresponding to each of the at least one IP packet group and will carrying mapping information between addresses in a transmission channel of each of the at least one IP packet group; and a sending unit that sends the first mapping information and the at least one IP packet group via the transmission channel.

According to another aspect of the present invention, there is provided a device for receiving broadcast data, the device provides a broadcast service by using IP (Internet Protocol) packets, the device includes: a first mapping information acquisition unit that acquires a first mapping information acquisition unit from a transmission channel mapping information, the first mapping information indicating mapping information between an IP address corresponding to each of at least one IP packet group and an address within a transmission channel that will carry each of the at least one IP packet group, wherein , dividing the at least one IP packet group based on a service provided by the IP packet; and an IP packet group obtaining unit selectively obtaining a desired IP packet group from the at least one IP packet group based on first mapping information.

Detailed ways

This application claims U.S. Provisional Application No. 60/978,488 filed in the U.S. Patent and Trademark Office on October 9, 2007 and Korean Patent No. 10-2008-0002954 filed in the Korean Intellectual Property Office on January 10, 2008 application, which is hereby fully incorporated by reference.

The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

FIG. 1 illustrates a protocol stack of an A-VSB transmission system that provides a broadcast service by using Internet Protocol (IP) packets according to an embodiment of the present invention.

In FIG. 1, a broadcast service is provided by using IP packets packaged according to the Open Mobile Alliance-Broadcast (OMA-BCAST) standard.

An IP packet according to the OMA-BCAST standard is generated by using data for providing a broadcast service. The generated IP packets are grouped according to the service. A service includes at least one service component. As a simple example, audio/video (A/V) services include audio services and video services. In this case, the generated IP packets may be grouped into a first IP packet group for providing an audio service and a second IP packet group for providing a video service. Each IP packet group has a corresponding IP address. In other words, the destination IP addresses or source IP addresses of the IP packets belonging to the same IP packet group are the same. In this specification, according to an embodiment of the present invention, an IP packet group represents at least one continuous packet, and may be used to represent an IP flow or an IP virtual channel, and the like.

The format of the IP packet is different from the format of the transport packet specified in Advanced VSB Mobile Broadcast (A-VSB MCAST) (hereinafter referred to as MCAST). Therefore, in the packet layer, the IP packets to be used in the MCAST system are adjusted and headers are added to these IP packets. In addition, in the packet layer, the signaling information is packaged separately from the IP packet. Signaling information includes information needed to send and receive data.

The IP packet is transmitted while carrying the IP packet on the MCAST transmission channel. The MCAST transmission channel includes a sub-data channel for transmitting at least one IP packet, and the IP packet group is transmitted while carrying the IP packet group on the sub-data channel. Each transport channel includes sub-data channels for transporting signaling information. An IP mapping table (hereinafter, referred to as IMT) to be described later exists in sub-data channels for transmitting signaling information, and sub-data channels carrying only desired IP packet groups can be classified by using IMT, and The sub-data channels may be processed. A method of processing a desired IP packet group using IMT will be described in detail with reference to FIGS. 3 to 5 .

The MCAST system solely includes a transmission channel for transmitting signaling information required for transmitting and receiving broadcast data. In this specification, a transport channel used to transmit signaling information is referred to as a Signaling Information Channel (SIC). Necessary information for handling other transport channels is contained in the SIC.

The SIC contains detailed information on transport channels, examples of which include IMT, position information of transport channels within a transport frame, time slice information, and decoding information on each transport channel. Hereinafter, the IMT existing in the SIC is called i-IMT to distinguish it from the IMT existing in other transport channels.

FIG. 2 shows syntax of IMT according to an embodiment of the present invention.

extended_version indicates whether IP_mapping_table() is updated. If the value of extended_version is "0", it means that IP_mapping_table() has not been updated.

number_of_channel indicates the number of transport channels. A metadata IP packet group to be described later is contained in each transport channel. Therefore, the number of metadata IP packet groups is the same as or greater than the number of transmission channels.

The reference_ch_flag indicates whether the corresponding transport channel is a combined and additional information transmission channel for transmitting combined and additional information related to a broadcast service. If the value of reference_ch_flag is '1', the corresponding transport channel is a combined and additional information transport channel. As an example, only a part of Electronic Service Guide (ESG) information is carried on the normal transport channel. However, all ESG information transmitted may be included in combined and additional information transmission channels. In this way, the combined and additional information transport channels are reference channels for the other transport channels.

Reserved is an area reserved for cases where syntax changes occur.

Turbo_channel_id is an identifier for identifying a transport channel.

LMT_Idex_number indicates the location of the sub-data channel carrying the IP packet group. A location map table (LMT) index number is assigned to each sub-data channel. Since the value of LMT_Index_number represents the LMT index number, the location of the sub-data channel carrying the IP packet group can be determined by using the value of LMT_Index_number.

number_of_IP_ch_descriptor indicates the number of IP_channel_descriptor(). It is the same as the number of IP packet groups carried on the transport channel.

IP_channel_descriptor() contains an additional description of the IP packet group. IP_channel_descriptor() provides an IP address table corresponding to an IP packet group, a MAC address table corresponding to an IP packet group, and a brief description of the IP packet group. One of IP addresses according to the IPv4 standard and the IPv6 standard can be used as the IP address used in the IP address table.

FIG. 3 illustrates a method of providing a broadcast service according to an embodiment of the present invention. In FIG. 3, the IP packet group is divided into a data IP packet group, an additional information IP packet group, and a metadata IP packet group. The data IP packet group is a collection of IP packets including data for providing a broadcast service. The additional information IP packet group is a collection of IP packets for providing additional information on broadcast services. In addition, the metadata IP packet group is a collection of IP packets for providing metadata about the additional information IP packet group.

A device for receiving broadcast data first accesses the SIC. The SIC contains the i-IMT, which contains the IP address corresponding to each metadata IP packet group, information about which metadata IP packet group is carried in which transport channel, and the IP address associated with each metadata IP packet group. related information etc. Table 1 below is a table showing information extracted from i-IMT.

Table 1

IP address The identifier of the transport channel Quick description 1.1.1.1 1 kbs1, Monday broadcast composition table 1.1.2.1 2 Kbs2, Tuesday broadcast composition table 1.1.3.1 3 Kbs3, Monday broadcast composition table 1.1.4.1 4 Kbs4, Monday broadcast composition table

Referring to Table 1, there are 4 metadata IP packet groups. The set of metadata IP packets carried on the first transport channel contains composition information related to the broadcast provided on Monday via the kbs1 base station, and the set of metadata IP packets carried on the second transport channel contains information related to the broadcast provided on Tuesday via the kbs1 base station Broadcast related composition information.

Devices for receiving broadcast data display a brief description of each metadata IP packet group to help users choose. If the user selects a predetermined metadata IP packet group, the apparatus for receiving broadcast data accesses a transmission channel containing the user-selected metadata IP packet group by referring to i-IMT. Hereinafter, assume a case where the composition information on broadcast is provided to the user via the kbs2 base station on Monday. Referring to Table 1, the IP address corresponding to the metadata IP packet group selected by the user is 1.1.3.1, and the metadata IP packet group selected by the user is carried on the third transmission channel.

A device for receiving broadcast data accesses a third transport channel to acquire IMT. The IMT is carried on a sub-data channel used to transmit signaling information within the third transport channel. The IMT contains information about the actual location of all groups of IP packets carried in the third transport channel. Table 2 below is a table for showing information extracted from IMT.

Table 2

IP address IMT index number 1.1.3.1 5 1.1.3.2 6 1.1.3.3 7 1.1.3.4 8 1.1.3.5 9 1.1.3.6 10 1.1.3.7 11 1.1.3.8 12 1.1.3.9 13

The device for receiving broadcast data determines from the i-IMT whether the IP address corresponding to the metadata IP packet group selected by the user is "1.1.3.1". Referring to Table 2, an IP packet group having an IP address "1.1.3.1" is carried on a sub-data channel having an LMT index number "5". A device for receiving broadcast data accesses a sub-data channel having an LMT index number (marked as an IMT index number in Table 2) "5" to process an IP packet.

Meanwhile, the metadata IP packet group provides metadata related to the additional information IP packet group. In other words, the metadata IP packet group contains information on the IP address corresponding to the additional information IP packet group. The device for receiving broadcast data processes IP packets included in the metadata IP packet group to obtain an IP address corresponding to the additional information IP packet group. Assume that the IP addresses corresponding to the additional information IP packet groups are "1.1.3.2", "1.1.3.3", and "1.1.3.4".

A device for receiving broadcast data accesses a sub-data channel carrying an additional information IP packet group by using IMT to obtain an IP packet. Referring to Table 2, additional information IP packet groups are carried on sub-data channels having LMT index numbers '6', '7' and '8'. A device for receiving broadcast data accesses sub data channels having LMT index numbers "6", "7" and "8" to process IP packets. The additional information IP packet group contains an IP address of a data IP packet group for providing a broadcast service.

The apparatus for receiving broadcast data processes the additional information IP packet group to combine the broadcast composition information provided by the kbs2 base station on Monday. Display combined broadcast composition information to help users choose. If the user selects the broadcast service to be provided, the device for receiving the broadcast data accesses the sub-data channel carrying the corresponding data IP packet group by using the IP address and IMT extracted from the additional information IP packet group. Subsequently, the IP packets carried on the corresponding sub-data channels are processed to provide broadcast services to users.

According to the present invention, only desired IP packets are selectively extracted and processed, and in particular, a broadcast service according to the OMA-BCAST standard can be provided.

FIG. 4 shows a method for providing a broadcast service based on the OMA-BCAST standard according to an embodiment of the present invention.

In FIGS. 4 and 5 , a service guide delivery channel (hereinafter referred to as SG delivery channel) corresponds to an additional information IP packet group, and a service guide announcement channel (hereinafter referred to as SG announcement channel) corresponds to a metadata IP packet group.

In operation S410, the device for receiving broadcast data accesses the SIC 401 to acquire i-IMT. Then, the device for receiving broadcast data accesses the transport channel carrying the SG announcement channel to be acquired by using i-IMT.

Assume that the SG announcement channel to be acquired is carried on the first transmission channel 402, wherein the first transmission channel 402 is a data transmission channel for transmitting data.

In operation S420, the device for receiving broadcast data accesses the first transport channel 402 to obtain the IMT from the sub-data channel 411 carrying signaling information. After the device for receiving broadcast data accesses the sub-data channel 412 carrying the SG announcement channel, the device processes the carried IP packet by using the acquired IMT. If the IP packet is processed, the IP address corresponding to the SG delivery channel is acquired.

In operation S430, the device for receiving broadcast data accesses the sub data channels 413 and 414 carrying the SG delivery channel, and processes the IP packet by using the acquired IP address and IMT. If the sub data channels 413 and 414 are processed, an IP address corresponding to a data IP packet group providing a broadcast service is acquired.

In operation S440, the device for receiving broadcast data accesses the sub data channel 415 carrying a desired data IP packet group, and processes the IP packet by using the acquired IP address and IMT to provide a broadcast service.

Now, a case where the SG announcement channel to be acquired is carried on the second transmission channel 403 which is a combined and additional information transmission channel for transmitting combined and additional information related to a broadcast service will be described. It is assumed that one day's broadcast composition information is carried on each transport channel. If a user requests broadcast composition information for one week, a device for receiving broadcast data must access each channel, acquire broadcast composition information for each day, and then assemble broadcast composition information for one week. In order to avoid this inconvenience, a week's worth of broadcast composition information carried on other channels is carried on the combination and additional information transmission channels. Therefore, if the user requests broadcast composition information for one week, the device for receiving broadcast data accesses the combined and additional information transmission channel to acquire broadcast composition information for one week.

Operations S410 to S430 are mentioned above, so repeated description thereof will be omitted.

In operation S450, the device for receiving broadcast data accesses the sub-data channel 415 carrying a desired data IP packet group using the IP address and IMT acquired by processing the SG delivery channel. Meanwhile, the data IP packet group may not be included in the combined and additional information transmission channel 403 . In this case, the sub-data channel 415 carrying the group of data IP packets may be included in other data transmission channels. Therefore, a device for receiving broadcast data may access other data transmission channels for processing said data IP packet groups.

Fig. 5 shows acquisition of SG based on OMA-BCAST standard according to an embodiment of the present invention.

Suppose a user wants to view broadcast composition information for a day. Broadcast composition information to be provided to users is carried on the first transmission channel 501 and transmitted.

The device for receiving broadcast data acquires IMT from the sub-data channel 510 for transmitting signaling information of the first transmission channel 501 . A device for receiving broadcast data accesses the sub data channel 520 carrying the SG announcement channel by using IMT. The IP packets within the sub-data channel 520 provide metadata related to the SG transport channel. Process the IP packets in the sub-data channel 520, and obtain the IP address corresponding to the SG transmission channel.

A device for receiving broadcast data accesses the sub data channels 530, 540, and 550 carrying the SG delivery channel by using the IMT and IP address. The sub-data channel 530 provides broadcast composition information from 00:00 to 08:00, the sub-data channel 540 provides broadcast composition information from 08:00 to 16:00, and the sub-data channel 550 provides broadcast composition information from 16:00 to 16:00. 24:00 broadcast composition information.

The device for receiving broadcast data processes the sub data channels 530, 540, and 550, and acquires broadcast composition information of one day by combining the sub data channels 530, 540, and 550.

FIG. 6 illustrates an apparatus for transmitting broadcast data according to an embodiment of the present invention.

Referring to FIG. 6 , an apparatus 600 for transmitting broadcast data includes a receiving unit 610 , a first mapping information generating unit 620 , and a transmitting unit 630 . The apparatus 600 for transmitting broadcast data provides a broadcast service by using IP packets.

The receiving unit 610 receives at least one IP packet group. The at least one IP packet group may be classified based on a service provided by the IP packet. IP packets belonging to the same IP packet group have the same destination (or sending location). The IP packet group includes a data IP packet group for providing broadcast services, an additional information IP packet group for providing additional information related to broadcast services, and a metadata IP packet for providing metadata related to the additional information IP packet group Group. The IP packet can be a packet used to ensure compliance with the OMA BCAST standard, the additional information IP packet group provides the SG based on the OMA BCAST standard, and the metadata IP packet group can provide the SG announcement based on the OMA BCAST standard.

The first mapping information generation unit 620 generates first mapping information indicating an IP address corresponding to each of the at least one IP packet group and a transmission channel that will carry each of the at least one IP packet group Mapping information between addresses within. When the apparatus 600 for transmitting broadcast data transmits the first mapping information via the A-VSB transmission system, the transmission channel includes at least one sub-data channel to carry at least one IP packet. Each IP packet group is carried on a sub-data channel and sent. The LMT index number is information indicating the location of the sub data channel, and an address within the transmission channel that will carry the IP packet group is provided by using the LMT index number. In the A-VSB transmission system, the first mapping information is information indicating which IP packet group is carried on which sub-data channel.

The sending unit 630 sends the first mapping information and at least one IP packet group via a transmission channel. In the A-VSB system, the transmission channel is a turbo channel. The transmission channel is divided into a data transmission channel for transmitting data, a signaling information transmission channel for transmitting signaling information including second mapping information to be described later, and a combination and additional information related to a broadcast service Combination and additional information transmission channels. The sending unit 630 may send the first mapping information, the metadata IP packet group and at least one additional information IP packet group through the data transmission channel.

The apparatus 600 for transmitting broadcast data may further include a second mapping information generation unit 640 . The second mapping information generation unit 640 generates second mapping information indicating mapping information between IP addresses corresponding to metadata IP packet groups and data transmission channels. In other words, the second mapping information is information indicating which transport channel carries which metadata IP packet group.

If the second mapping information is generated, the sending unit 630 sends the second mapping information via a signaling information transmission channel. The signaling information transmission channel is a channel for transmitting signaling information, which is information required to transmit and receive broadcast data.

The transmitting unit 630 may transmit combined and additional information related to the broadcast service through the combined and additional information transmission channel. The combined and additional information channel transmits groups of additional information IP packets contained in two or more transport channels via one channel. As an example, the first additional information IP packet group and the second additional information IP packet group are transmitted together via the additional information transmission channel. In this case, the first additional information IP packet group contains additional information related to the first broadcast service provided via the first data transmission channel, and the second additional information IP packet group contains information related to the first broadcast service provided via the second data transmission channel. 2. Additional information related to broadcasting services.

FIG. 7 shows an apparatus 700 for receiving broadcast data according to an embodiment of the present invention.

Referring to FIG. 7 , an apparatus 700 for receiving broadcast data includes a first mapping information obtaining unit 710 and an IP packet group obtaining unit 720 .

The first mapping information obtaining unit 710 obtains first mapping information from a transmission channel, the first mapping information indicating an IP address corresponding to each of at least one IP packet group and a transmission channel that will carry each of the at least one IP packet group Mapping information between addresses within.

When the transmission channel is a channel for transmitting data in the A-VSB transmission system, the transmission channel includes at least one sub-data channel carrying at least one packet. In this case, the first mapping information may be carried on a sub-data channel used to transmit signaling information, and may be sent. The first mapping information contains information on whether each IP packet group is carried on a sub-data channel.

The IP packet group obtaining unit 720 obtains only the IP packet group from at least one IP packet group transmitted through the transmission channel based on the first mapping information. The at least one IP packet group may include at least one data IP packet group for providing broadcast services, an additional information IP packet group for providing additional information related to the broadcast service, and an IP packet group for providing additional information related to the broadcast service. Metadata IP packet group for metadata. In order to provide desired broadcast services to users, the IP packet group acquisition unit 720 must sequentially acquire metadata IP packet groups and additional information IP packet groups. The detailed structure of the IP packet group acquisition unit 720 will be described later with reference to FIG. 8 .

The additional information IP packet group in this specification may be an SG transport channel that provides an SG based on the OMA BCAST standard. The SG transport channel is a virtual channel indicating a collection of IP packets providing the SG. Additionally, the metadata IP packet group may be an SG announcement channel that provides SG announcements based on the OMA BCAST standard. The SG Announcement Channel is a virtual channel indicating a collection of IP packets providing SG Announcement.

The apparatus 700 for receiving broadcast data may further include a second mapping information acquiring unit 730 . The second mapping information obtaining unit 730 obtains the second mapping information from the signaling information transmission channel. The signaling information transmission channel transmits signaling information, which is information required to transmit and receive broadcast data. The second mapping information indicates mapping information between an IP address corresponding to the metadata IP packet group and a data transmission channel. In other words, the second mapping information contains information on which metadata IP packet group is carried on which transport channel.

The first mapping information obtaining unit 710 searches for a data transmission channel carrying the metadata IP packet group requested by the user based on the second mapping information obtained by the second mapping information obtaining unit 730 . Subsequently, the first mapping information is acquired from the sub-data channel used to transmit the signaling information.

FIG. 8 shows a detailed structure of the IP packet group acquisition unit 720 of FIG. 7 according to an embodiment of the present invention.

The IP packet group obtaining unit 720 may include a first obtaining unit 722 , a processor 724 , a second obtaining unit 726 and a third obtaining unit 728 .

The first obtaining unit 722 obtains the metadata IP packet group by using the first mapping information.

The processor 724 processes the obtained metadata IP packet group to obtain an IP address corresponding to the additional information IP packet group.

The second obtaining unit 726 obtains the additional information IP packet group by using the first mapping information and the obtained IP address.

The processor 724 processes the obtained additional information IP packet group to further obtain an IP address corresponding to the data IP packet group.

The third acquiring unit 728 acquires the data IP packet group requested by the user by using the first mapping information and the IP address corresponding to the data IP packet group.

When a user requests combination and additional information related to a broadcast service, the first mapping information acquiring unit 710 accesses the combination and additional information transmission channel by using the second mapping information, and acquires the first mapping from a predetermined position of the combination and additional information transmission channel information.

The combined and additional information transmission channel is a channel for transmitting combined and additional information related to the broadcast service. The first group of additional information IP packets and the second group of additional information IP packets are carried on the combined and additional information transmission channel. The first additional information IP packet group contains additional information related to the first broadcast service provided via the first data transmission channel, and the second additional information IP packet group contains additional information related to the second broadcast service provided via the second data transmission channel. information.

In addition, groups of data IP packets may not be carried on combined and additional information transport channels. In this case, the third obtaining unit 728 must access other channels and obtain the data IP packet group by using the first mapping information and the IP address corresponding to the data IP packet group.

FIG. 9 is a flowchart illustrating a method of transmitting broadcast data according to an embodiment of the present invention.

In operation S910, at least one IP packet group is received. IP packet groups are divided based on services provided by the IP packets, and at least one IP packet group is carried on a transmission channel and transmitted.

In operation S920, first mapping information is generated. The first mapping information indicates mapping information between an IP address corresponding to each of the at least one IP packet group and an address within a transmission channel that will carry each of the at least one IP packet group. In other words, the first mapping information contains information about the location of the group of IP packets carried within the transport channel.

In operation S930, the first mapping information and at least one IP packet group are transmitted through a transport channel. According to the present invention, in order to provide a broadcast service according to the OMA BCAST standard, an additional information IP packet group for providing additional information related to the broadcast service and a metadata IP packet for providing metadata related to the additional information IP packet group are transmitted At least one of the group.

FIG. 10 is a flowchart illustrating a method of receiving broadcast data according to an embodiment of the present invention.

In operation S1010, first mapping information is acquired from a transmission channel. In order to obtain the first mapping information, the second mapping information may be obtained first. The second mapping information indicates mapping information between an IP address corresponding to the metadata IP packet group and a data transmission channel. In other words, the second mapping information contains information on which metadata IP packet group is carried on which transport channel. The second mapping information may be obtained via a signaling transport channel.

In operation S1020, an IP packet group to be obtained of at least one IP packet group may be selectively acquired from a transmission channel based on the first mapping information.

Operation S1020 may be performed through operations S1021 to S1025.

In operation S1021, a metadata IP packet group is acquired from a data transmission channel by using the first mapping information.

In operation S1022, the acquired metadata IP packet group is processed to obtain an IP address corresponding to the additional information IP packet group.

In operation S1023, the additional information IP packet group is acquired from the data transmission channel by using the first mapping information and the acquired IP address.

In operation S1024, the obtained additional information IP packet group is processed to obtain an IP address corresponding to the data IP packet group. At least one data IP packet may be carried on the data transmission channel.

In operation S1025, a data IP packet group is selectively obtained from at least one data IP packet group.

In this specification, the present invention is implemented by using the A-VSB transmission system. However, according to an embodiment of the present invention, the present invention can be implemented by using a transmission system defined by ATSC.

The present invention can also be embodied as computer readable codes on a computer readable recording medium. The computer readable recording medium is any data storage device that can store data which can be thereafter read by a computer system. Examples of the computer-readable recording medium include read only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage devices. The present invention can also be embodied as computer readable codes on a computer readable transmission medium. An example of the computer-readable transmission medium is a carrier wave (eg, data transmission via the Internet). The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

While the invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that changes may be made herein without departing from the spirit and scope of the invention as defined by the claims. and various changes in details. The exemplary embodiments should be considered in a descriptive sense only and not for purposes of limitation. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present invention.

Claims (34)

1. method that sends broadcast data, described method provides broadcast service by using IP (Internet protocol) bag, and described method comprises:

Receive at least one IP package, divide described IP package based on the service that provides by the IP bag;

Produce first map information, each corresponding IP address of the indication of described first map information and described at least one IP package and will carry map information between the interior address of each transmission channel of described at least one IP package; And

Send first map information and described at least one IP package through described transmission channel.

2. the method for claim 1, wherein described transmission channel is the channel that is used to transmit data in senior residual sideband (A-VSB) system.

3. the method for claim 1, wherein, described transmission channel is the data transmission channel that is used to transmit data, at least one the IP package that is sent out through data transmission channel is comprised at least one of metadata IP package of the additional information IP package of the additional information that is used for providing relevant with broadcast service, the metadata that is used to provide relevant with additional information IP package.

4. method as claimed in claim 3, described method also comprises:

Produce second map information, indication of described second map information and metadata IP package corresponding IP address and will carry map information between the data transmission channel of metadata IP package; And

Signaling information transmission channel through being used for command transmitting information sends second map information, and wherein, described signaling information is to send and receive the required information of broadcast data.

5. method as claimed in claim 3, described method also comprises: send the first additional information IP package and the second additional information IP package, wherein, the described first additional information IP package comprises and the relevant additional information of first broadcast service that provides through first data transmission channel, the described second additional information IP package comprises and the relevant additional information of second broadcast service that provides through second data transmission channel and combination and additional information transmission channel, and described combination is used to transmit combination relevant with broadcast service and additional information with the additional information transmission channel.

6. method as claimed in claim 3, wherein, additional information IP package provides the service guide (SG) according to Open Mobile Alliance-broadcasting (OMABCAST) standard, and metadata IP package provides the SG bulletin according to the OMABCAST standard.

7. the method for claim 1, wherein, described transmission channel comprise will carry at least one sub-data channel of at least one IP bag, the address in the data transmission channel is each location map table (LMT) call number of position of sub-data channel that indication will be carried described at least one IP package.

8. method that receives broadcast data, described method provides broadcast service by using IP (Internet protocol) bag, and described method comprises:

Obtain first map information from transmission channel, each corresponding IP address of the indication of described first map information and at least one IP package and will carry map information between the interior address of each transmission channel of described at least one IP package, wherein, divide described at least one IP package based on the service that provides by the IP bag; And

Obtain the IP package of wanting based on first map information selectively from described at least one IP package.

9. method as claimed in claim 8, wherein, described transmission channel is the channel that is used to transmit data in senior residual sideband (A-VSB) system.

10. method as claimed in claim 8, wherein, described transmission channel is the data transmission channel that is used to transmit data, at least one the IP package that sends through data transmission channel is comprised the additional information IP package of the additional information that is used for providing relevant with broadcast service and at least one of the metadata IP package of the metadata that is used to provide relevant with additional information IP package.

11. method as claimed in claim 10, wherein, the step of obtaining the IP package selectively comprises:

By using first map information to obtain metadata IP package from data transmission channel;

The metadata IP package that processing is obtained is to obtain and additional information IP package corresponding IP address; And

Obtain additional information IP package by the IP address of using first map information and obtain from data transmission channel.

12. method as claimed in claim 11, wherein, described at least one the IP package that transmits through data transmission channel comprises at least one the data I P package that is used to provide broadcast service,

The step of obtaining the IP package selectively comprises:

The additional information IP package that processing is obtained is to obtain and data I P package corresponding IP address; And

By using first map information and from described at least one data I P package, obtaining the data I P package of wanting selectively with data I P package corresponding IP address.

13. method as claimed in claim 10, described method also comprises:

Obtain second map information of map information between indication and metadata IP package corresponding IP address and the data transmission channel from the signaling transmission channel that is used for command transmitting information, described signaling information is to send and the required information of reception broadcast data; And

Obtain the data transmission channel that carries metadata IP package based on second map information,

Wherein, the step of obtaining first map information comprises: obtain first map information from the precalculated position of the data transmission channel of visit.

14. method as claimed in claim 10, wherein, additional information IP package provides the service guide (SG) according to Open Mobile Alliance-broadcasting (OMA BCAST) standard, and metadata IP package provides the SG bulletin according to OMA BCAST standard.

15. method as claimed in claim 8, wherein, described transmission channel is combination and the additional information transmission channel that is used to transmit combination relevant with broadcast service and additional information, to comprise the first additional information IP package and the second additional information IP package through at least one IP package of combination and additional information transmission channel, the described first additional information IP package comprises and the relevant additional information of first broadcast service that provides through first data transmission channel, and the described second additional information IP package comprises and the relevant additional information of second broadcast service that provides through second data transmission channel.

16. method as claimed in claim 8, wherein, described transmission channel comprises at least one sub-data channel that carries at least one IP bag, and the address in the data transmission channel is each the LMT call number of position of sub-data channel that indication will be carried described at least one IP package.

17. an equipment that sends broadcast data, described equipment provides broadcast service by using IP (Internet protocol) bag, and described equipment comprises:

Receiving element receives at least one IP package, divides described IP package based on the service that provides by the IP bag;

The first map information generation unit, produce first map information, each corresponding IP address of the indication of described first map information and described at least one IP package and will carry map information between the interior address of each transmission channel of described at least one IP package; And

Transmitting element sends first map information and described at least one IP package through described transmission channel.

18. equipment as claimed in claim 17, wherein, described transmission channel is to be used to transmit the channel that is used to transmit data in senior residual sideband (A-VSB) system.

19. equipment as claimed in claim 17, wherein, described transmission channel is the data transmission channel that is used to transmit data, at least one the IP package that sends through data transmission channel is comprised the additional information IP package of the additional information that is used for providing relevant with broadcast service and at least one of the metadata IP package of the metadata that is used to provide relevant with additional information IP package.

20. equipment as claimed in claim 19, described equipment also comprises the second map information generation unit that produces second map information, indication of described second map information and metadata IP package corresponding IP address and will carry map information between the data transmission channel of metadata IP package, wherein, the transmitting element also signaling information transmission channel through being used for command transmitting information sends second map information, and described signaling information is to send and receive the required information of broadcast data.

21. equipment as claimed in claim 19, wherein, transmitting element also sends the first additional information IP package and the second additional information IP package, wherein, the described first additional information IP package comprises and the relevant additional information of first broadcast service that provides through first data transmission channel, the described second additional information IP package comprises and the relevant additional information of second broadcast service that provides through second transmission channel and combination and additional information transmission channel, and described combination is used to transmit combination relevant with broadcast service and additional information with the additional information transmission channel.

22. equipment as claimed in claim 19, wherein, additional information IP package provides the SG according to Open Mobile Alliance-broadcasting (OMA BCAST) standard, and metadata IP package provides the SG bulletin according to the OMABCAST standard.

23. equipment as claimed in claim 17, wherein, described transmission channel comprise will carry at least one sub-data channel of at least one IP bag, the address in the data transmission channel is each the LMT call number of position of sub-data channel that indication will be carried described at least one IP package.

24. an equipment that receives broadcast data, described equipment provides broadcast service by using IP (Internet protocol) bag, and described equipment comprises:

The first map information acquiring unit, obtain first map information from transmission channel, each corresponding IP address of the indication of described first map information and at least one IP package and will carry map information between the interior address of each transmission channel of described at least one IP package, wherein, divide described at least one IP package based on the service that provides by the IP bag; And

IP package acquiring unit obtains the IP package of wanting based on first map information selectively from described at least one IP package.

25. equipment as claimed in claim 24, wherein, described transmission channel is the channel that is used to transmit data in senior residual sideband (A-VSB) system.

26. equipment as claimed in claim 24, wherein, described transmission channel is the data transmission channel that is used to transmit data, at least one the IP package that sends through data transmission channel is comprised the additional information IP package of the additional information that is used for providing relevant with broadcast service and at least one of the metadata IP package of the metadata that is used to provide relevant with additional information IP package.

27. equipment as claimed in claim 26, wherein, IP package acquiring unit comprises:

First acquiring unit obtains metadata IP package by using first map information from data transmission channel;

Processor is handled the metadata IP package that obtains, to obtain and additional information IP package corresponding IP address; And

Second acquisition unit obtains additional information IP package by the IP address of using first map information and obtain from data transmission channel.

28. equipment as claimed in claim 27, wherein, described at least one IP package through the data transmission channel transmission also comprises at least one the data I P package that is used to provide broadcast service, the additional information IP package that processor processing is obtained, to obtain and data I P package corresponding IP address, IP package acquiring unit also comprises the 3rd acquiring unit, and described the 3rd acquiring unit is by using first map information and obtaining the data I P package of wanting selectively with data I P package corresponding IP address from described at least one data packet group.

29. equipment as claimed in claim 26, described equipment also comprises: the second map information acquiring unit, obtain second map information of the map information between indication and metadata IP package corresponding IP address and the data transmission channel from the signaling transmission channel that is used for command transmitting information, described signaling information is to send and receive the required information of broadcast data, wherein, the first map information acquiring unit carries the data transmission channel of metadata IP package based on second map information search, and obtains first map information from the precalculated position of the data transmission channel of search.

30. equipment as claimed in claim 26, wherein, additional information IP package provides the service guide (SG) according to Open Mobile Alliance-broadcasting (OMA BCAST) standard, and metadata IP package provides the SG bulletin according to OMA BCAST standard.

31. equipment as claimed in claim 24, wherein, described transmission channel is combination and the additional information transmission channel that is used to transmit combination relevant with broadcast service and additional information, to comprise the first additional information IP package and the second additional information IP package through at least one IP package of combination and additional information transmission channel, the described first additional information IP package comprises and the relevant additional information of first broadcast service that provides through first data transmission channel, and the described second additional information IP package comprises and the relevant additional information of second broadcast service that provides through second data transmission channel.

32. equipment as claimed in claim 24, wherein, described transmission channel comprises at least one sub-data channel that carries at least one IP bag, and the address in the data transmission channel is each the LMT call number of position of sub-data channel that indication will be carried described at least one IP package.

33. a computer readable recording medium storing program for performing that has program recorded thereon, described program is used to carry out the method for claim 1.

34. a computer readable recording medium storing program for performing that has program recorded thereon, described program is used to carry out method as claimed in claim 8.

Images