KR100739218B1 - Method, system and network entity for indicating hierarchical mode for transport streams carried in broadband transmission - Google Patents

Abstract

A transmission method, a reception method, a system, a transmitter, and a receiver for signaling a layer priority mapping of a transport stream (TS) to a receiver are disclosed. A method of separating tuning information between different TSs having different priorities is provided. In radio layer broadband transmission, preferably based on DVB-T, one signal carries two transport streams: a low priority (LP) stream and a high priority (HP) stream, both of which in their own transport_stream_id. Are identified. A one bit flag is added to the specific descriptor of the broadband transmission to indicate the hierarchy of transport streams for the information provided by the descriptor. By using this priority indication or priority flag, the receiver can obtain layer mapping of each known transport stream in the management information of the broadband transmission.

Layer priority, broadband transmission DVB-T

Description

METHOOD, SYSTEM AND NETWORK ENTITY FOR INDICATING HIERARCHICAL MODE FOR TRANSPORT STREAMS CARRIED IN BROADBAND TRANSMISSION}

The present invention relates to a system, method, and network entity for distributing data over a communication link.

Broadcast has a long tradition of nearly a century in radio. Even on TV, its history dates back to the 1930s. Broadcasting has been successful in providing entertainment and information to the public worldwide.

The final stage of broadcasting is the digitization of radio and television. Digital radio has not been very well received in the market. However, many expect that digital TV will provide new benefits and services to viewers and, as a result, generate new revenue streams in the broadcasting industry. However, the basic concept of the TV service itself does not change much. Rather, the TV exists as it is even though it is digitized.

The Internet boom occurred in the late 1990s. In the short term, new services and content have been revolutionized and intensively available to consumers. During this period e-commerce, Internet service providers (ISPs), portals, eyeball games, dot com companies, and even new economic conditions have been introduced. Advances in both access technologies (eg ADSL) and coding techniques (eg MPEG-4 streaming) have made it possible to bring media content such as video content into the home over the Internet. Despite these technological and market developments, media houses are reluctant to distribute their content over the Internet because of the free nature of the Internet and the threat of direct infringement. The Internet, despite its popularity, could not challenge the role of traditional media as the first advertising platform.

Broadcast is a flexible system that allows broadcasters to choose from a variety of options to suit their diverse service environment. In general, there is a trade-off between signal robust versus bit rate per service. In some cases, this problem is solved by modulating the data, essentially incorporating individual data transmissions into a single transmission, where a receiver with a "good" reception state can receive both or both. However, those with a weak reception state receive only one with more robust coding. When a receiver receives such a transmission, for example, when it gathers information about existing signals known to it, a problem arises. There is no distinction between these transmissions combined into a single transmission. Based on the parsing information, the receiver can only find a signal with more robust signal transmission. Other transmissions are not entirely known to the receiver. Thus, in a situation where many or some of the transmitted services are not available or worse, they are not known at all. This created the need to identify these transmissions.

In view of the various inherent limitations of broadcasting, it would be desirable to avoid or mitigate these and other problems associated with prior art systems. Therefore, it is necessary to indicate the linkage between the transport stream and the hierarchical priority.

Now, a method and apparatus have been devised for indicating a mapping between a layer priority mode and a stream carried in a transmitted signal.

In one aspect of the present invention, there is provided a receiving method, transmitting method, system, transmitter, and receiver for digital wideband transmission using hierarchical modulation. Information is provided about how layer priorities are mapped to transport streams carried in digital broadband transmissions of digital broadband systems.

To better understand the present invention, the following detailed description refers to the accompanying drawings, wherein the scope of the invention is defined by the appended claims.

The invention is now described by way of example only with reference to the accompanying drawings.

1 shows an example for a network information table (NIT) for mapping transport streams to tuning parameters in accordance with an embodiment of the present invention.

2 is a flowchart illustrating a method of parsing an NIT and a priority parameter according to an embodiment of the present invention.

3 is a flowchart illustrating a method of separating tuning information between transport streams having different priorities according to an embodiment of the present invention.

4 illustrates in a flowchart form a method for indicating how layer priority is mapped to a transport stream in a layer wideband transmission according to an embodiment of the present invention.

5 shows the general structure of a system to which the principles of the implemented invention can be applied.

6 shows a functional block diagram of a terminal parsing how layer priorities are mapped to different transport streams in accordance with an embodiment of the present invention.

Digital Video Broadcasting (DVB) provides a high bandwidth wideband transport channel, where delivery is generally broadcast, multicast or alternatively unicast. High bandwidth transport channels provide a variety of services to users of such systems. In order to focus on appropriate service models and receivers, identification is needed to obtain various services. DVB provides applicable principles and is preferably used in the invention in which terrestrial digital video broadcasting (DVB-T) is implemented.

Digital broadband transmission provides a huge amount of data information to the receiver device. A characteristic of digital broadband transmission is that it is generally a streaming distribution to multiple receivers, even if using broadcast and multicast, or alternatively a unicast point to point distribution to a single receiver. The receiver device should be able to find the appropriate data information among the huge amount of transmitted data information. The receiver device needs certain parameters so that the receiver device can receive the appropriate service and / or a portion of the service that may be scheduled or needed. Because digital broadband transmissions can distribute large amounts of data, this digital broadband transmission can also distribute parameters that enable the receiver device to discover the service and / or a portion of the service transmitted. These parameters are transmitted to the receiver device by digital wideband transmission. The receiver device can recognize them and modify itself according to the parameters. Thus, the receiver device can now begin receiving the service by identifying the appropriate data from the enormous amount of data in the wideband transmission. The data distribution link of the broadband transport may be a terrestrial link, preferably a mobile or wireless terrestrial link. Digital broadband transmission systems can interact with the receiver, but this interaction is not a mandatory requirement.

As used herein, broadband transmission or transmission is referred to as broadcast, multicast, or unicast, and the data may include, but is not limited to, IP protocol-encoded data.

A preferred embodiment of the present invention provides a transmission method, a reception method, a system, a transmitter and a receiver for signaling a layer priority (eg, HP or LP) mapping of transport streams (TSs) carried in a signal to a receiver. The preferred embodiment provides a method of separating tuning information between different TSs having different priorities. In radio layer wideband transmission, preferably based on DVB-T, one signal can carry two transport streams: a low priority (LP) stream and a high priority (HP) stream, both of which are each Identified by trasport-stream-id. A bit flag is added to the specific descriptor of the broadband transmission to indicate the hierarchy of transport streams for the information provided by the descriptor. By applying this priority indication or priority flag, the receiver can obtain layer mapping for each known transport stream in the management information of the broadband transmission.

Another preferred embodiment provides a modification to terrestrial_delivery_system_descriptor by setting a field in the descriptor to signal the layer priority (eg, HP or LP) of the transport stream (TS) to where the descriptor is linked. In layer wideband transmission, one signal carries two transport streams (TS): a low priority (LP) stream and a high priority (HP) stream. Both LP and HP streams are identified by their own transport_stream_id. Thus, when hierarchical transmission is used, the deficiency of how to map the transport_stream_id to the DVB-T stream is overcome.

Yet another preferred embodiment provides a solution to the mapping problem of HP and LP streams by adding a 1 bit flag to terrestrial_delivery_ system_descriptor. The bit flag indicates the layer priority of the transport stream (TS), from which related descriptors provide information about it. By means of this priority_flag, an integrated receiver device (IRD) can obtain a hierarchical mapping of each of the transport streams TS known in the NIT.

Advantageously, transport_stream_ids may be linked to DVB-T layer mode streams, for example TSs with low priority (LP) or high priority (HP). The implemented invention can be considered to be compatible with existing DVB-T receivers. This does not impose any restrictions on existing facilities, mainly because the implemented invention uses the 'reserved for future use' bits of terrestrial_delivery_system_descriptor.

Some embodiments of the present invention employ hierarchical modulation. An example environment for hierarchical modulation may be DVB-T. Hierarchical broadband transmission includes at least two different transport streams (TSs) with different priorities. In hierarchical modulation, two separate data streams are modulated onto a single DVB-T signal. One DVB-T stream then contains one "high priority" (HP) stream and one "low priority" (LP) stream. Receivers with a "good" reception state can receive both of these streams, while receivers with a poor reception state can only receive "high priority" streams. Broadcasters can target two different types of DVB-T receivers going to two completely different services. In general, LP streams have a higher bit rate than HP streams, but lower robustness. Layer wideband transmission is particularly suitable for mobile or portable reception. As an advantage, the LP and HP streams may be indicated by flags included in the descriptor that identify the priority (high or low) of the streams and their correspondence with the transport stream. Thus, the receiver will be able to identify and classify the streams of the hierarchical broadband transmission. The receiver may classify tuning information between transport streams having different priorities. As used herein, hierarchical priority refers specifically to streams having two or more priority values or characteristics, and is not limited to low priority and high priority as it may have various priorities.

Some embodiments of the present invention use program specific information (PSI) and service information (SI) tables. PSI and SI form a set of tables used as additional structures in MPEG-2 transmission. PSI is defined in the MPEG-2 System Standard ISO / IEC 13818-1, and SI is defined in the DVB specification for Service Information (SI) ETSI EN 300 468. These tables are used to convey different information about the services carried in the MPEG-2 transport.

MPEG-2 transmission is controlled by the system layer, which provides the information needed to multiplex and demultiplex the data. This information includes a program specific information (PSI) table that serves as a content table for all services carried in the MPEG-2 transport. In addition, the DVB organization stipulates that all networks supporting the DVB standard should use at least certain SI tables in their transmissions. An example of such a table is a network information table (NIT).

Some embodiments of the present invention use a network information table (NIT). NIT provides tuning information related to grouping of TSs. The NIT may be used during the set-up procedure of the integrated receiver device (IRD), and the relevant tuning information is stored in nonvolatile memory. NIT can also be used to signal a change in tuning information. In the implemented invention, the following rules apply to the NIT.

a) the actual delivery system sends the NIT;

b) For example, if the NIT includes applicable delivery system descriptors for the actual delivery system, the NIT describing the actual delivery system may be considered valid. If there are some changes in the broadcast delivery system boundary, then the NIT delivered in the TS will describe the previous network in the broadcast chain. Different mechanisms should be chosen by the IRD to obtain appropriate tuning information for the actual delivery system. For example, if the satellite IRD receives a satellite delivery system descriptor for the actual delivery system, it is valid. If the cable IRD receives the cable delivery system descriptor for the actual delivery system, it is valid. If the cable IRD receives satellite delivery descriptors for the actual delivery system, it is considered invalid for the cable IRD;

c) if a valid NIT for the actual delivery system is present in the SI bit stream, it generally lists all the TSs of the actual delivery system;

d) The SI stream has at least 8 TS packets carrying NIT data or NULL packets per 10 seconds. This rule simplifies the replacement of NIT at the broadcast delivery system boundary. In a simple alternative mechanism, local frequency control is possible with relatively inexpensive equipment.

The SI uses two labels for the concept of the delivery system: network_id and original_network_id. The latter is primarily intended to support unique identifiers of the services included in the TS, even though the TS is sent to a delivery system other than the original delivery system.

The TS may be uniquely referenced through the path original_nework_id / transport_stream_id. The service can only be referenced through the path original_nework_id / transport_stream_id / sevice_id. Thus, network_id may not be part of this path. In addition, each service_id is unique within each original_network_id. When a service (included in TS) is transferred to another delivery system, only the network_id changes, while the original_network_id is not affected. Further details of the NIT can be found in the standard specification ETSI EN 300 468, for example described on page 17 of the final edition ETSI EN 300 468 V1.5.1 (2003-01).

Some embodiments of the present invention use descriptors. Descriptors can alternatively be referred to as identifiers or indicators by their functions in broadband transmission. The DVB standard defines several descriptors, which are additional fields in the PSI / SI tables used to announce information to the receiver. Standard Specification: EN 300 468-Digital Video Broadcasting (DVB); ETSI TR 101 211- Specification for Digital Video Broadcasting (DVB) and Service Information (SI) in DVB Systems; Guidelines for the implementation and use of service information (SI) provide a more detailed description of descriptors. An example of a descriptor is Terrestrial_delivery_system_ descriptor.

Delivery system descriptors are satellite_delivery_system_descriptor, cable_delivery_system_descriptor and terrestrial_delivery_system_descriptor. Descriptors for other delivery systems can be defined. Delivery system descriptors are used to transmit the physical parameters of each transport multiplex in the network. In general, one (and only one) delivery system descriptor appears in each loop. IRDs must be able to interpret the delivery system descriptors for fast tuning to the TS. More detailed technical details can be found in the standard specification TR 101 211 and are described, for example, in sections 4.1.1 and 5.3.1.

Some descriptors or identifiers may be indicated by underscore characters in the technical specification. For example, terrestrial delivery system descriptors are indicated by terrestrial_delivery_system_ descriptor.

Another embodiment of the present invention using the NIT table and terrestrial_delivery_system_descriptor is provided below. Support for the mapping of a single DVB-T transport stream (default situation) can be found in EN 300 468. However, when the DVB-T network is using the hierarchical mode, a problem may arise and only one transport stream may be mapped to the RF channel, contrary to the principle that the hierarchical mode preferably comprises two transport streams. This leads to a situation in which the IRD does not know whether the transport_stream_id known in the NIT belongs to the LP stream or the HP stream.

Table 1 below shows an example of the structure of the NIT table. The terrestrial_delivery_system_descriptor (equivalent to page 44 of the last edition of ETSI EN 300 468 V1.5.1 (2003-01)), exemplarily shown in Table 2 below, is carried in the second descriptor loop of the NIT. terrestrial_delivery_system_descriptor is looked up in the second descriptor loop of the NIT and is highlighted in the table above.

Table 1: Example of Network Information Table (NIT)

From the first field "stored for future use", one bit, preferably named priority_flag (highlighted in bold in the example in Table 2), is modified so that the transport stream associated with the descriptor is either low priority (LP) or high priority. It is set to indicate whether or not it has (HP). This signaling format is described in more detail in the example in Table 3.

Table 2: Example Terrestrial Delivery System Descriptors

Table 3: Example Signaling Formats for Priorities

Below, further embodiments are described for mapping the transport_stream_id to the priority of these streams and parsing the priority parameter and NIT in layer-based wideband data transmission reception.

FIG. 1 shows an example of an NIT table for mapping a transport stream with layer information and tuning parameters queried by the NIT. Thus, an example is shown how the NIT maps the transport stream to tuning parameters and priority_flag. TSs may be indicated by an original_network_id and a transport_stream_id pair. TSs are known in the transport stream loop of the NIT. The tuning parameter and priority_flag are known in terrestrial_delivery_system_descriptor. Firstly, two known transport streams (TS) are carried in the same signal (center frequency 498MHZ). In the example, the differences between the transport streams are just the layer priority value and the transport_stream_id. The first (transport_stream_id = 1) is a high priority (HP) transport stream. This is shown in Fig. 1, where the priority_flag value is set to one. The second (transport_stream_id = 2) is a low priority (LP) transport stream. This is shown in Fig. 1, where the priority_flag value is set to zero.

Again in the example of FIG. 1, by adding priority_flag to terrestrial_delivery_system_descriptor, transport streams known to the NIT are mapped to corresponding layer information.

2 illustrates a method of parsing NIT and parameters in accordance with another embodiment of the present invention. The process begins at 200. The digital broadband network (DBN) operates and the IRD is switched on to receive the broadband transmission. The IRD checks some PSI / SI tables and thus obtains information about known transport streams. The IRD receives and confirms the NIT. In step 201, the IRD parses the transport_stream_id and the original_network_id from the transport stream loop of the NIT. The IRD also obtains the terrestrial_delivery_system_descriptor that is retrieved from the NIT. In step 202, the IRD analyzes the terrestrial_delivery_system_descriptor for the parsed transport_stream_id. The terrestrial_delivery_system_ descriptor includes priority_flag. In step 203, the IRD stores the transport_stream_id parsed in step 201 and the parameters parsed in step 202. Accordingly, transport_stream_id and original_network_id are mapped to tuning parameters and layer information, and they can be stored in the memory of the IRD. In step 204, it is examined whether all items in the transport stream loop have been parsed. If not, the process proceeds to step 205 for the next transport_stream_id and original_network_id pair of the transport stream loop of the NIT. Thus, steps 201 to 204 may be performed for all transport_stream_id and original_network_id pairs of the transport stream loop of the NIT. If all relevant items in the transport stream loop have been parsed, the process ends at step 206. Advantageously, the IRD gains knowledge of how to identify transport streams with different priorities in layer transmission. Advantageously, the IRD can classify the priority streams from one another.

The example of FIG. 3 shows a method of classifying tuning information between TSs having different priorities. The process begins at 300. The digital broadband network (DBN) is operational and the IRD is switched on to receive DVB-T layer wideband transmission. The IRD checks some PSI / SI tables and thus obtains information about known transport streams. The IRD receives and confirms the NIT. In step 301, the IRD parses SI data. IRD parses transport_stream_id and original_network_id from NIT transport stream loop. The IRD also obtains the terrestrial_delivery_system_descriptor that is retrieved from the NIT. In step 302, the IRD parses the priority information. IRD parses terrestrial_delivery_system_descriptor for parsed transport_stream_id. terrestrial_delivery_ system_descriptor includes priority_flag. In step 303, the IRD may separate tuning information between TSs having different priorities. The IRD stores the transport_stream_id parsed in step 301 and the original_network_id parsed in step 302. Accordingly, the transport_stream_id and the original_network_id mapped with the tuning parameter and the layer information, and the mapping may be stored in the memory of the IRD. Preferably, it is examined whether all items in the transport stream loop have been parsed. Accordingly, step 301 and step 302 may be performed for all transport_stream_id and original_network_id pairs of the transport stream loop of the NIT. Advantageously, the IRD gains knowledge of how to identify transport streams with different priorities in layer wideband transmission. Advantageously, the IRD can also separate the priority streams from each other. In step 304, the IRD may receive the HP TS. Thus, if necessary, the IRD can focus only on high priority streams. If the transmission status is not "good", for example if there is interference in the reception of the DVB-T, this would be appropriate. In step 305, the IRD may receive the LP TS. Thus, if necessary, the IRD can focus only on the low priority stream. Although LP TS may be more difficult to receive than HP TS, it is advantageous because LP is made available to IRD based on indication and identification. If the reception state is poor or "not good", and some interference occurs in the reception, minimal information can be obtained that the layer DVB-T transmission has an LP TS. Under poor conditions, the LP TS may have some interference. In addition, both HP and LP TS may be received by IRD.

The example of FIG. 4 shows how to indicate how layer priority is mapped to a transport stream in a hierarchical wideband transmission. In step 400, the DBN operates and processes the service data for DVB-T transmission. In step 401, the DBN provides SI / PSI data. The terrestrial_delivery_ system_descriptor with Priority_flag information is included in the PSI / SI tables of the second descriptor loop of the NIT. Thus, NIT priority information is provided at step 402. In step 403 the DBN also sends HP and LP TSs. Based on the descriptor, the DBN may classify the hierarchical streams into high and low priority streams, and in addition, may show or indicate the classification. In particular, the IRD may discover LP streams even if the reception condition is not optimal.

Some embodiments of the present invention utilize the system of FIG. 5. The network of FIG. 5 may be configured to transmit terrestrial_delivery_system_descriptor to match the announcement of the hierarchical priority mapping of TSs of hierarchical broadband transmission. The integrated receiver device (IRD) preferably operates in the region of the digital broadband network (DBN). Alternatively, the IRD may be called an End User Terminal (EUT). The IRD may receive IP based services provided by the DBN. The DBN is based on DVB, preferably DVB-T, and the transmission of the DBN includes TSs based on hierarchical transmission modulation. The transmission is also preferably a wireless broadband transmission. Before the transfer, the data is processed in the DBN. The DBN includes means for modifying the transmission being sent. DBNs provide SI / PSI data. The terrestrial_delivery_system_descriptor with Priority_flag information is included in the PSI / SI table of the second descriptor loop of the NIT. Thus, NIT priority information is provided. The DBN also carries HP and LP TSs. Based on the descriptor, the DBN may classify the hierarchical streams into high and low priority streams, and in addition, may show or indicate the classifications. In particular, the IRD may discover LP streams even if the reception state is not optimal. The IRD may identify the layer priority of each TS carried in the digital broadband transmission. The IRD does not need to be modified in advance to interpret these descriptors and transmissions, but the receiver will or may not be suitable for receiving wideband transmissions. IRD does not require any interaction for identification and mapping procedures. Preferably, the DBN transmission is a wireless or mobile transmission to an IRD based on DVB-T. Thus, data can be transmitted wirelessly.

Again in FIG. 4, headends (HEs) comprising an IP encapsulator perform multi-protocol encapsulation (MPE) and transfer IP data to a video communication-transport stream (MPEG-TS) based data container. Position it. HE performs the creation of the tables, the linking of the tables, and the modification of the tables.

The TSs thus produced are transmitted over the DVB-T data link. The IRD digitally receives the broadcast data. The IRD also receives TSs and descriptors for layer wideband transmissions, and possibly other TSs as well. The IRD may identify TSs with priority indications. Thus, the DBN signals the priority of the TS of layer transmission. IRD parses the transport_stream_id from the received NIT. The IRD may separate TSs having different priorities. In addition, the IRD may classify the TSs based on layer priority. In addition, the IRD may map layer priority to TSs, for example information on how transport_stream_id and original_network_id are mapped to tuning parameters and layer information. The mapping result may be stored in the memory of the IRD. Other operations are described in the examples of FIGS. 1-4 and Tables 1-3 above.

The example of FIG. 6 shows a functional block diagram of an integrated receiver device (IRD) or alternatively called a receiver or end user terminal (EUT). The IRD receiver may be decoded to conform to terrestrial_delivery_system_descriptor. The IRD includes a processing unit (CPU), a user interface unit (UI), and a wideband receiver part, which is alternatively called a multi-carrier signal receiver part, for example a DVB-T signal. A multicarrier wideband signal can be received. The wideband receiver part and the user interface (UI) are connected to the processing unit (CPU). The user interface (UI) includes a display and a keyboard to allow the user to use the receiver. The user interface (UI) also includes a microphone and a speaker for receiving and producing audio signals. The user interface (UI) also includes voice recognition (not shown). The processing unit CPU includes a microprocessor (not shown), a memory, and possibly software SW (not shown). The software SW may be stored in a memory. Based on the software (SW), the microprocessor outputs at the user interface (UI) the operation of the receiver, such as the identification of the layer priority of the TS, the linking of the layer priority with a specific TS, the separation of the TSs with different priorities, and the user interface (UI). Control the display of and the reading of inputs received from the user interface (UI). Operations are described in the examples of FIGS. 1-5 and Tables 1-3 above. For example, hardware (not shown) may include means for detecting signals, inverse modulation means, NIT detection means, means for detecting terrestrial_delivery_system_descriptor, means for parsing transport_stream_id and original_network_id, and priority_flag for parsed transport_stream_id. Means for parsing terrestrial_delivery_system_descriptor with means, means for mapping transport_network_id and original_network_id with tuning information and layer information, and means for storing information in memory. If the broadcast service changes drastically and the IRD must rely on the information known in the NIT, the IRD can advantageously separate the tuning information between TSs having different priorities.

6, alternatively, middleware or software implementations may be used (not shown). The IRD may be a hand-held device that the user can easily carry. Advantageously, the IRD may comprise a cellular mobile phone comprising a broadcast receiver or multi-carrier signal receiver part for receiving DVB-T broadcast transport streams (this is illustrated by the dashed block in FIG. 6, an optional option). Just a). Thus, the EUT may interact with the service provider.

Advantageously, no additional time is needed to parse additional tables for providing HP / LP mapping by other means. In addition, no time-consuming signal scan is required for all possible tuning combinations that can be repeated in the possible frequency range.

The receiver can advantageously concentrate on the streams of the layer DVB-T transmission that the receiver wishes to focus on. Thus, LP streams are not ignored and can be identified at least. It is also improved in terms of power consumption by avoiding any additional frequency scans or parsing of the received DVB-T transmissions that contribute to the mobility aspects of the DVB-T receiver. The receiver only needs to be able to interpret the defined descriptors by using the same means used to receive and identify other descriptors of digital broadcasting.

Some embodiments of the present invention support portable reception, for example, in an IP datacast receiver, and can be applied to mobile hand-held receivers or terminals. The mapping indication of the transport stream with layer priority information is advantageous in this case. In general, mobile DVB-T receivers are disadvantageous in terms of power consumption. In addition, the reception state changes and some interferences occur that interfere with mobile reception in broadband transmission. Thus, hierarchical modulation can be advantageous in a mobile environment, since at least certain critical streams can be delivered. Advantageously, in hierarchical broadband transmissions, the streams can be seen to be advantageous to the receiver, and the mobile receiver vulnerable to power consumption can identify the streams of the hierarchical broadband transmission. The mobile receiver does not need to perform any power consuming operation such as additional frequency scanning, additional stream scanning, or in general further scanning of the streams parameter. In addition, any additional parsing that consumes the power of the receiver can be avoided since the initial reception and subsequent initial analysis sequences can be based on a single basic broadcast reception.

The performance of the embodiments can enhance the advantages of the present invention, such as efficiency. For example, DVB-T provides an effective and inexpensive method of distributing data, and embodiments provide a low power consumption reception method for broadcast data streams, even when partially working with non-power consumption based broadcast systems. Can improve.

In another embodiment of the present invention, a method for indicating separation of an HP / LP stream is described. The method also provides a method for signaling the mapping to the transport stream in layer priority mode. The digital broadband network system or the operator of such a system announces the transport streams in the NIT in a particular order. For example, firstly, the HP TS for this multiplex and frequency is known. LP TS is then known for that multiplex and frequency. Thus, the NIT announces the TSs in a particular order, where a particular location of the order is agreed to mean a priority level.

Specific implementations and embodiments of the invention have been described. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described embodiments, but may be implemented in other embodiments using equivalent means without departing from the nature of the invention. It is intended that the scope of the invention only be limited by the appended claims. As a result, the options embodying the invention and equivalents thereof, as determined by the claims, are also within the scope of the invention.

Claims (51)

A method of transmitting a digital broadband transmission, Providing information on how layer priority is mapped to a transport stream carried in the digital wideband transmission. The method of claim 1, The second transport stream has a different priority, Based on the priorities, further comprising separating the transport stream from the second transport stream of the digital wideband transmission. The method of claim 1, Parsing information identifying the transport stream; Parsing information identifying the priority; And Linking the parsed information to map the transport stream to the priority. The method of claim 1, The priority indicates whether the transport stream includes low priority or high priority, Wherein the priorities are based on adding the hierarchical information to the signal of the digital wideband transmission. The method of claim 1, And providing the information comprises transmitting a descriptor of the digital broadband transmission indicative of the priority. The method of claim 1, A network information table identifies the transport stream, And the descriptor of the network information table identifies the priority of the transport stream. The method of claim 6, And the descriptors include terrestrial propagation system descriptors of the network information table. The method of claim 7, wherein And a priority flag of the terrestrial transmission system descriptor of the network information table identifies the priority. The method of claim 6, And both the transport stream id included in the network information table and the original network id uniquely identify the transport stream. The method of claim 1, At least two data streams are modulated onto the single digital wideband transmission. The method of claim 10, Wherein said two streams comprise a high priority stream and a low priority stream. The method of claim 11, And said high priority stream has a higher robustness than said low priority stream. The method of claim 11, And wherein the low priority stream has a higher bit rate encoding than the high priority stream. The method of claim 1, And wherein said digital wideband transmission comprises multi-carrier signal transmission. The method of claim 1, And wherein said digital wideband transmission comprises DVB transmission. The method of claim 15, And said DVB transmission comprises a DVB-T transmission. The method of claim 1, And wherein said digital broadband transmission comprises wireless digital broadband transmission. The method of claim 17, And wherein said wireless digital broadband transmission comprises DVB-T for mobile reception. In a method of receiving a digital broadband transmission: Obtaining information on how layer priority is mapped to the transport stream carried in the digital broadband transmission. A method of transmitting layer digital broadband transmission, Providing information indicative of a priority of a transport stream of the hierarchical digital wideband transmission. A method of receiving layer digital broadband transmissions, Obtaining information indicative of a priority of a transport stream of the hierarchical digital broadband transmission. The method of claim 21, And obtaining the information comprises receiving a descriptor of the digital broadband transmission indicative of the priority. The method of claim 22, A network information table identifies the transport stream, And the descriptor in the network information table identifies the priority of the transport stream. The method of claim 23, wherein Wherein the descriptor comprises a terrestrial delivery system descriptor of the network information table. The method of claim 24, A priority flag of said terrestrial delivery system descriptor in said network information table identifies said priority. The method of claim 23, wherein And both the transport stream id included in the network information table and the original network id uniquely identify the transport stream. A data processing system comprising means for performing the method steps according to claim 1, 19, 20, or 21. delete delete A computer readable medium, A computer readable medium comprising program code for performing the method steps of claim 1, 19, 20, or 21 when operating on a computer. As a recording medium, A carrier medium, comprising the computer-executable program of claim 28. A system for providing digital wideband transmission using hierarchical modulation, Means for providing information on how layer priority is mapped to the transport stream carried in the digital broadband transmission. The method of claim 32, And said means comprises a bit flag indicating a value of said priority. The method of claim 33, And the bit flag is included in the service information of the digital broadband transmission. The method of claim 34, The service information includes a network information table, And the bit flag appears in the network information table. The method of claim 35, wherein The network information table includes a descriptor, And the bit flag is present in the descriptor. The method of claim 36, The descriptors include terrestrial delivery system descriptors, And the bit flag is included in the terrestrial delivery system descriptor. A transmitter for transmitting digital broadband transmissions, Means for providing information on how layer priority is mapped to the transport stream carried in the digital broadband transmission. As a receiver to receive digital broadband transmissions: Means for obtaining information on how layer priority is mapped to the transport stream carried in the digital broadband transmission. The method of claim 39, And the means comprises a bit flag indicating the priority value. The method of claim 40, And the bit flag is included in the service information of the digital wideband transmission. 42. The method of claim 41 wherein The service information includes a network information table, And the bit flag appears in the network information table. The method of claim 42, wherein The network information table includes a descriptor, And the bit flag appears in the descriptor. The method of claim 43, The descriptors include terrestrial delivery system descriptors, And the bit flag is included in the terrestrial delivery system descriptor. The method of claim 39, And the receiver comprises a mobile receiver. The method of claim 45, And the receiver comprises a mobile DVB-T receiver. The method of claim 46, And the receiver further comprises a mobile station for interaction. A transmitter for transmitting layer digital broadband transmissions, Means for providing information indicative of a priority of a transport stream of the hierarchical digital wideband transmission. A receiver for receiving layer digital wideband transmissions. Means for obtaining information indicative of a priority of a transport stream of said hierarchical digital broadband transmission.        As a method of transmitting digital broadband transmissions: The transmission is in such a way that at least two or more basically separate data transmissions are integrated into the single digital broadband transmission, Providing information on how the configuration level in the integrated single digital broadband transmission is mapped to the transport stream carried in the digital broadband transmission. As a method of receiving digital broadband transmissions: The reception is in such a way that at least two or more basically separate data transmissions are integrated into the single digital broadband transmission, And obtaining information on how a configuration level in said integrated single digital broadband transmission is mapped to a transport stream carried in said digital broadband transmission.

Images