KR100721776B1 - Method, system and network entity for providing digital broadband transmission - Google Patents

Abstract

A method, system, transmitter, and receiver for identifying time division base streams using PSI / SI tables. This identification provides a way to separate the time partitioned elementary stream from non-time partitioned elementary streams by specifying two descriptors in the PSI / SI tables. A time division identifier descriptor is defined and can be used to identify time division elementary streams. This descriptor can also be used to provide additional information about the EH transmitted elementary streams. The present invention provides a method for publishing side information of time-segmented elementary streams through PSI / SI tables. It also provides a mechanism to classify single elementary stream (s) into non-time-divided and time-divided. A method is disclosed for identifying time-segmented elementary streams delivered over a DVB network and providing additional information for these streams. This can be done by using a time division identifier descriptor. The descriptor may be used at least through the Network Information Table (NIT), the Program Map Table (PMT), and the IP / MAC Notification Table (INT) tables. Time division provides a way to save power in the receiver over broadband transmission.

Description

Method, system and network entity for providing digital broadband transmission

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

Broadcasting over the radio has a tradition of nearly one hundred years. TV also dates back to the 1930s. Broadcasting has been successful throughout the world in providing both entertainment and information to the public.

The latest move in broadcasting is the digitization of both radio and television. Digital radio is not very accepted in the market. However, there is much expectation that digital TV will bring new benefits and services to consumers, resulting in new revenue trends for the broadcast industry. But the basic concept of TV service itself has not changed much. Rather, TV remains digital as it was before.

In the late 1990s, we witnessed the boom of the Internet. The use of a full set of new services and content was allowed to consumers for a short, innovative and intensive period of time. This period has introduced e-commerce, Internet service providers (ISP), portals, eyeballs games, dot com companies and new economies. Advances in both access technologies (eg ADSL) and coding techniques (eg MPeG-4 streaming) have allowed rich media content such as video content to be brought home over the Internet. Despite these advances in technology and markets, media owners are resistant to distributing their content over the Internet because of the "free fee" attribute and the direct threat of piracy. Even with the Internet, despite its great popularity, one can question the traditional media role as a basic advertising platform.

The broadcast provides a huge amount of information to the receiver device. The receiver device must obtain the link and the guide information from the broadcast information, so as to obtain a service and / or a part of the service that can be indicated in the link and the guide information. Link and guidance information is usually included in service information (SI) that points to and directs the search for services. SI refers to several services of at least one broadcast network.

Modern broadcast equipment has created a need to consider power consumption at the receiver, and some efforts have been made to reduce power consumption at the receiver. However, despite these efforts being compatible with SI, receivers and systems do not benefit so much. In addition, they are even blind to broadcast. In this case, the receiver cannot determine which of the streams carried in the multiplex is configured to comply with the power reduction principles and, if possible, which is not.

In view of the various inherent limitations of broadcasting, it would be desirable to avoid or reduce these and other problems associated with conventional systems. Thus, there is a need to identify some of the broadband transmissions in terms of power consumption principles.

The method and apparatus from now on have been invented to identify some of the broadband transmissions in terms of power consumption principles.

According to one aspect of the invention, a method is provided for receiving a digital wideband transmission to save power at a receiver. The method includes providing information indicative of a maximum burst duration; Based on the provision information, detecting a portion configured to meet the power savings of the receiver; And switching on / off at least a part of the receiver based on the provided information.

According to another aspect of the present invention, a method of transmitting a digital broadband transmission is provided to save power at a receiver. The method includes providing information indicative of a maximum burst duration; And classifying the portion adapted to meet power savings at the receiver based on the provided information, so as to switch on / off at least a portion of the receiver according to the provided information.

According to another aspect of the present invention, a system is provided for providing digital wideband transmission to save power at a receiver. The system includes means for providing information indicative of a maximum burst duration; Means for detecting a portion based on the information provided to match a power saving of the receiver; And means for switching on / off at least a portion of the receiver based on the information provided above.

According to another aspect of the invention, a receiver is provided that receives a digital wideband transmission to save power at the receiver. The receiver comprises means for receiving information indicative of a maximum burst duration; Means for detecting, based on the received information, a portion configured to conform to a power saving of a receiver; And means for switching on / off at least a portion of the receiver based on the received information.

According to another aspect of the present invention, a transmitter is provided that transmits a digital wideband transmission to save power at a receiver. The transmitter comprises means for providing information indicative of a maximum burst duration; And means for classifying the portion adapted to meet power savings at the receiver based on the provided information, so as to switch on / off at least a portion of the receiver in accordance with the provided information.

BRIEF DESCRIPTION OF THE DRAWINGS In order that the present invention may be better understood, reference is made to the following description taken in conjunction with the accompanying drawings, in which the scope of the invention will be known in the appended claims.

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

1 illustrates an example of a digital broadband transmission and a receiving principle for that transmission, in accordance with an embodiment of the invention.

2 illustrates an example of a relationship between a DVB network, transport streams (TSs), DVB service, and components to which the principles of the invention may be applied.

3 shows an example of application of delta-t jitter in another embodiment of the present invention.

4 shows the general structure of a system to which the principles of the invention to be applied are to be applied.

5 illustrates a functional block diagram of a terminal for identifying time sliced elementary streams and providing additional information for the received elementary stream, in accordance with an embodiment of the invention.

6 shows a flowchart of a method for identifying time-segmented elementary streams and providing side information for received elementary streams, according to an embodiment of the invention.

7 illustrates a flowchart of a method for separating time division elementary streams from non-time division elementary streams, according to an embodiment of the invention.

8 shows a flowchart of a method of classifying transmitted DVB streams according to an embodiment of the present invention.

Digital video broadcasting (DVB) generally provides a high bandwidth wideband transmission channel in which the transmission is broadcast, multicast, or unicast. The high bandwidth transport channel can provide a variety of services to users of such systems. The confirmation to receive various services needs to be tailored to the appropriate service models and receivers. DVB provides applicable principles, where digital video terrestrial broadcasting (DVB-T) is preferably applied in the practice of the present invention. Alternatively, the present invention may be applied to an appropriate degree in transmission according to the Advanced Television System Committee (ATSC).

Digital broadband transmissions provide huge amounts of data information to receiver devices. The nature of digital broadband transmission is that it is generally streaming distribution to multiple receivers using broadcast, multicast, or otherwise unicast point-to-point transmission to a single receiver. The receiver device must be able to find relevant data information amongst a huge amount of transmitted data information. The receiver device needs certain parameters to be able to receive some of the relevant service and / or service (s) that may be intended or desired for it. Since digital broadband transmission can distribute a lot of data, it can also distribute parameters that enable the receiver device to find some of its services and / or service (s) in the transmission information. These parameters are transmitted by digital broadband transmission to the receiver device. The receiver device can recognize them and change itself according to its parameters. Thus, the receiverl device can now start receiving the service by identifying the relevant data from the huge amount of data of the wideband transmission. The data distribution link of the broadband transmission may be a wireless link, a fixed link, or a wired link. The digital broadband transmission system (s) may interact with the receiver, but this interaction is not a mandatory requirement. Due to the power consumption aspect of the receiver device where power consumption is an important issue, such as a mobile DVB receiver such as mobile DVB-T, parts of DVB transmission adapted to conform to the power saving principles of DVB transmission of the receiver device It is beneficial to identify and focus on it. For example, the receiver is functionally or physically on, or otherwise off, during periods when the associated transmission is usually transmitted periodically or asynchronously. In addition, parameters for the power saving principle in DVB transmission can be advantageously applied for transmitting and publishing additional information on the service and part of the service (s) transmitted according to the DVB power saving principle.

As used herein, transmission refers to broadcast, multicast, or unicast, and the data may include, but is not necessarily limited to, data encoded with an IP protocol.

Preferred embodiments of the present invention provide a method, system, transmitter and receiver for the identification of time-divided elementary streams using a PSI / SI table. This identification provides a way to separate the time division elementary stream (s) from the non time division elementary stream (s) by defining a descriptor in the PSI / SI tables. Preferred embodiments define a time division identifier descriptor that can be used to identify time streams that are time division. This descriptor is also preferably used to provide additional information about the transmitted elementary streams. Accordingly, the present invention implemented provides a method of publishing additional information on elementary streams that are time-divided through PSI / SI tables in a broadcast environment. It also provides a mechanism for classifying single elementary stream (s) as non-time-divided and time-divided.

Preferred embodiments provide a method of identifying time-segmented elementary streams carried over a DVB network and provide additional information about these streams. This can be done by using a time division identifier descriptor. The descriptor may be used in at least the Network Information Table (NIT), the Program Map Table (PMT) and the IP / MAC Notification Table (INT) tables. Each table provides the following levels of information:

NIT-A descriptor is used to provide information per each transport stream (ie all applicable elementary streams in the transport stream are time sliced).

PMT-A descriptor is used to provide information per each elementary stream to carry one or more IP / MAC streams.

INT-A descriptor is used to provide information per each elementary stream to carry one or more IP / MAC streams.

It should be noted that the SI and / or possibly SI table (s) in this connection also have PSI and PSI table (s). The SI / PSI tables preferably include a time division identifier descriptor and are passed to the receiver. The time division identifier descriptor may be referred to as time_slice_identifier_descriptor in the technical specification.

Some embodiments of the present invention apply the time division data transmission principle of DVB. In the following, a brief introduction to the specific time division of DVB will be made. Current DVB-T receivers (including both radio frequency and baseband portions) may be considered to consume too much power to be incorporated into mobile convergence terminals. Power consumption is roughly 2.5 W in the current "technical state". However, the average power consumption of some additional receivers in mobile handheld terminals should preferably be lower than 250 mW. This is not only due to limited battery capacity, but also due to the very challenging thermal dissipation in a compact environment. Thus, to be able to use the DVB-T receiver of the mobile terminal, a power reduction of approximately 80-90% is required. Increasing the level of functional integration of DVB-T partially solves this problem. The services usually used in mobile terminals are based on very low bit rate transmission in nature. The most common maximum bit rate is about 350 kbit / s. The DVB-T transmission system provides mobile compatible modulation parameter selection even up to 12 Mbits / s bit rate. This offers the possibility of dramatically lowering average DVB-T receiver power consumption by introducing time division multiplexing (TDM). TDM is referred to herein as time slicing because active and inactive periods are much longer than traditional TDM. The principle concept is to transfer information over a burst to utilize an important part (or all) of the bandwidth of a DVB-T transport channel. For example, different neighboring bursts are associated with different services, and the bursts are sent periodically. Such transmissions do not necessarily have to be discontinuous, as is the case with TDM, but continuous transmission can be applied in such a way that the reception focus is focused on the relevant part of the transmission or that the emphasis is on the relevant part of the transmission even if the transmission is continuous. . This allows the receiver to continue to provide a consistently low bit rate by buffering the received bursts while allowing it to operate for only a short time. Thus, time division applies the TDM principle and at least partially turns off the receiver when the receiver is not used. Time division is preferably applied to streaming and other continuous parallel IP data services. IP data is transmitted as bursts utilizing an important part (or all part) of the DVB-T transport channel bandwidth. The time interval between two bursts associated with the same service depends on the bit rate used. The receiver is functionally on during the reception of the relevant bursts and otherwise at least partially off.

Time division systems are introduced to improve terminal performance, mainly low power consumption. Thus, the time division system can be optimized so that its implementation is optimal for the terminal from the terminal perspective. On the transmitter side, the implementation can be more complex. This choice is justified because the number of terminals is much greater than the number of transmitters. The DVB-T system is a broadcast type (one to many). Since EK, the number of transmitters is very small. In addition, the implementation cost on the transmitter side is less sensitive than the terminal implementation. If a time division stream is transmitted over DVB, that time division stream may be identified by a time division identifier descriptor. Thus, time division streams can be distinguished from any other non time division streams. In addition, the descriptor can provide detailed information about the stream and the services it contains and related to.

With continued reference to the time division embodiment, the transmitted service is divided into bursts at the transmitter side. Low bit rate service (eg, video streaming) is transmitted with high bit rate bursts using the full capacity of the DVB-T channel. This makes it possible to transmit the same amount of data in a shorter time in a continuous system. The receiver can only be turned on during the burst of the service being received.

The transmitter also provides system clock information for the receiver, for example by sending clock stamps. In such a system, the transmitter and receiver are always approximately in time.

The transmitter uses the associated clock to indicate the timing of the bursts. The transmitter uses some protocol to send information about the start, stop, duration and on / off intervals of the burst, for example. All timing information concerns the start of the burst, but is not absolute. The terminal uses this information to turn the DVB-T receiver on and off. The transmitter must buffer at least two bursts before the first burst is transmitted so that the relevant timing information (interval) can be inserted into the frame information.

Subsequently referring to the time division embodiment, the transmitter generates the required timing information k. This information may be added to the information sent immediately before transmission, or the delay between timing information insertion and actual transmission should be fixed or predictable.

The timing information may be stored in modulation data such as, for example, 1) DVB-MPE (multiprotocol encapsulation) frames or other DVB data, 2) IP packets, and 3) DVB-T's TPS (transmitter parameter signaling). Can be inserted.

The terminal extracts the timing information and switches the receiver on just before the burst is transmitted. This gives time for the useful data to be synchronized to the incoming stream before the burst is received.

A typical low precision (+ -1) clock from the standard SI tables; It can be extracted into SI tables such as time and date tables or time offset tables. This clock information is used to start receiving. This is also used for SFDL (Scheduled File Download).

For time division, relevant timing information must be provided. Both the transmitter and the receiver have their own clocks and it is assumed that the relative precision of these clocks is good enough. In practice, the relative timing information can be transmitted over MPE frames with a resolution of 10 ms, for example. The transmitter signals the start of the next burst with respect to the current burst. The terminal uses its own real time clock to go to sleep (receiver off) until the next burst.

The example of Figure 1 illustrates a digital broadband transmission and the receiving principle for such transmission, according to an embodiment of the invention. This example depicts time division data broadband transmission and shows how the different services are partitioned in figure 100. This example also shows a receive power diagram 101 depicting when the receiver should be turned on and off so that the appropriate service can be received according to the power saving principles. The example of FIG. 1 includes four services to transmit. The receiver wants to receive service 3 and therefore the receiver power on / off timing is substantially on while the receiver is substantially at the points in time when service 3 is transmitted, while otherwise reducing or reducing the power consumption of the receiver. Is adjusted to off.

Some embodiments of the transport protocol applied in the present invention are based on ISO / IEC 13818-1 Information Technology-Comprehensive Coding of Video and Related Audio Information: System described on page viii-xii, incorporated herein by reference: . ISO / IEC 13818-1 defines a transport stream (TS) that forms the base for service delivery and DVB.

Some embodiments of the invention apply an elementary stream (ES). 2 shows an example of a relationship between a DVB network 200, transport streams (TS) 201, a DVB service 202, and elementary streams (ES) 203 including components. One component may define a part of a service, and preferably includes parameters for the reception of that service or part of the service. One component is generally identified by the component_tag. The component_tag is unique within the DVB service. Components are carried in an elementary stream (ES) and are identified by a program identifier (PID). PID is unique within the TS. The mapping between the component_tag and the PID is signaled in the program map table (PMT). As shown by the broken line in FIG. 2, it is possible for one ES to carry components of two or more DVB services. Various ESs may be identified by the time division identifier descriptor, in addition, the time division descriptor may provide additional information about the elementary streams being transmitted. The time partition identifier descriptor is contained in the SI / PSI tables.

In general, IP streams contain IP datagrams. A preferred solution for transporting IP over DVB is multiprotocol encapsulation (MPE). The MPE works with the INT table specified in the DVB specification.

Some embodiments of the present invention apply INT table (s). The IP / MAC Notification Table (INT) is used to signal the availability and location of IP streams in the DVB network. INT describes the availability and location of the IP streams. There can be one or several INTs covering all IP streams for a DVB network. The INT is referenced, for example, by the data_broadcast_id_descriptor 0x000B in the ES_info loop of the PMT. Each IP platform containing the IP streams available in the TS is published in exactly one INT sub_table of the TS. INT announces all IP streams available in the actual TS. INT may publish IP streams on other TSs. INT announces all IP streams on all TSs of the DVB network that the receiver has accessed (by retuning) while accessing the TS containing that INT (ie DVB signals with overlapping or adjacent coverage). can do. The time division identifier descriptor may be referenced in the INT table, which descriptor is used to provide information per each elementary stream carrying one or more IP / MAC streams.

Continuing reference is made to the INT embodiments and the use of the time division identifier descriptor of the INT table. The time division identifier descriptor can be located in the platform loop and in the operation loop of INT.

If the time partition identifier descriptor is in the platform_loop, that descriptor applies to all ESs published in the whole INT sub_table.

If the time division identifier descriptor is in an action_roof, that descriptor applies to all ESs published in that loop (action_loop).

By adding a descriptor in the first loop, the descriptor is applied to all the ESs in the sub_table and so is only needed once. Advantageously, the use of a time division descriptor in INT optimizes bandwidth usage. If most ESs are time-divided and very few (if any) are time-divided, this will greatly optimize the use of band i. Even if all ESs are time sliced, adding a descriptor to the INT optimizes bandwidth usage because the INT is usually retransmitted much less than all other PSI tables. The syntax of the time division identifier descriptor is shown in the example of Table 1.

Some embodiments of the present invention use a time division identifier descriptor. Table 1 provides an example of a time division identifier descriptor table.

The time division identifier descriptor includes five fields used to provide information of time division IP streams. The time division identifier descriptor is located or referenced at least in the following PSI / SI tables PMT, NIT, and INT. The time-partition identifier descriptors may include descriptor_tag (general descriptor field), descriptor_length (general descriptor field), time_partition_version, max_burst_durability, burst_in_service_size, delta_t_jitter, And fields such as delta_t_vorxj. An example of more detailed time division identifier descriptor fields will be provided below.

Time_slicing_version: Specifies the version of time division used. For example, a certain version number, such as '00', may be reserved to indicate that the referenced ES is not time-divided, in which case the following fields may be ignored. Advantageously, the use of a version ID enables the delivery of several different versions of the time division standard to the same network, and also to the time division MPE level and TS level simultaneously.

Max_burst_duration: This indicates the maximum burst duration. Table 2 below provides a coding example of the maximum_burst_duration.

This includes a static timeout value. Preferably, when the final data of the burst is lost for some reason, the receiver can still rest (and save power) in this case. Based on the information about the burst maximum duration, the receiver can estimate the reception period and can rest so that data reception is not interrupted even if a burst is lost.

Service_size_within_burst: specifies the maximum number of bits per service session in a burst. If only one service session is carried in the ES, this is the maximum size of the burst in the ES. If multiple service sessions are carried within the ES, the size of the burst may be greater than the specified value. Table 3 below provides an example of coding the maximum service size in a burst.

The purpose of burst size per session is to limit burst devices per session. Preferably, the application of burst size per session allows the IP streams to be time-divided within the elementary stream. Another advantage is that while the receiver is associated with the sessions, it can explicitly optimize (or reduce) memory usage based on the sessions. The transmitter makes the transmission such that the bursts are made specific to the elementary stream. The transmitter follows this even when a single session does not use more than a certain amount of bytes in the burst. When the receiver receives such a transmission, the receiver knows that bursts are formed from sessions. Thus, the magnitude of the burst handled by the transmitter is different from the magnitude known by the receiver. The advantage of using burst size per session is that the receiver can handle more data objects (many sessions / bursts) better, the memory usage of the receiver is reduced and information about the applicable size of the memory is available. It is obtained as the memory gets closer to optimal use, and the application scale of time division on / off time zones is expanded.

Thus, the use of sessions to limit the burst size perceived by the receiver can be given.

Delta_t_jitter: The time division identifier descriptor may also have a field for indicating the delta_t offset parameter delta_t_jitter. The delta-T parameter represents the time when the receiver should be turned off until the next relevant burst during the time division of digital broadband transmission. Thus, the off time until the next relevant burst is signaled to the receiver by the delta-T parameter. Delta-T precision should be indicated to the receiver. For example, +/- 10 ms or +/- 20 ms or the like is signaled in theoretical use or currently applied use. It may also indicate a unit or another unit that is not current or in use. The parameter for this is preferably called delta t jitter. The parameter specifies the output tolerance of the MPE bursts of the transmitters. This can be used by the IRD to correct the delta-t value given in the MPE header of each burst. This parameter provides information on how the transmission time precision affects the next burst transmission. Delta T is displayed per burst. Table 4 below provides examples of coding delta t jitter.

Delta_t_factor: Specifies the value by which delta-t is to be multiplied. For example, if the delta-t value read from the burst is 10 ms and the factor is 2, the time to the next burst is 10 * 2 = 20 ms. Typically, the value specified for the factor is 1, but other values may be used. Table 5 below provides a coding example of the delta t factor.

Figure 3 illustrates the use of delta-t jitter in another embodiment of the present invention. The example of Figure 3 shows the transmission of two bursts (burst 300 and burst 301), where reference a) indicates the information of the delta-t set in the MPE header before transmission. Further, reference numeral b) denotes jitter occurring during actual transmission, where delta-t jitter is denoted by n. Thus, if an operator (also known as a transmitter) knows the delta-t jitter (+/-) that occurs on each transmission and announces it through the time_identifier_descriptor in the delta_t_jitter field, the IRD You can prepare for errors.

Some embodiments of the invention apply NIT. The NIT carries information regarding the physical organization of multiplexes / TSs in a given DVB network, and the characteristics of the DVB network itself. More details on NIT can be found on page 16 of the standard specification EN 300 468 (2000-11). When a time division identifier descriptor is applied via the NIT, the time division identifier descriptor is used to provide information per each transport stream, for example, all applicable elementary streams in the transport stream are time division. The time division identifier descriptor may be located in the transport stream loop of the NIT. Further details on the transport streams of the NIT can be found in Table 3 of the standard specification EN 300 468 page 16. When the time division identifier descriptor is applied through the NIT, the time division identifier descriptor maps each transport stream to the information to which the time division identifier descriptor belongs.

Some embodiments of the present invention use PMT. Each PMT literally devises a particular program and lists the PID values for packets that contain the video, audio, and data components of that program. With this information, the decoder can easily find, decode and display the content of the program. ISO / IEC 13818-1 Information Technology Specification—In comprehensive coding of video and related audio information, the system provides some more technical details about PMT on page 44. The time division identifier descriptor is preferably used to provide information per elementary stream when used in a PMT. In other examples, the use of the time division identifier descriptor of the PMT table may be as follows. The time division identifier descriptor may be located in the second loop of the PMT. The second loop of the PMT can be referred to in ISO / IEC 13818-1 of Table 2-28 on page 44. When a time division identifier descriptor is applied via the PMT, it maps each elementary stream to the information to which the time division identifier descriptor belongs.

4 has been described above. In the following, corresponding reference numerals have been applied to corresponding components. Some embodiments of the present invention utilize the system of FIG. 4. It is desirable that the end user terminal (EUT) be within the scope of a digital broadcast network (DBN). The EUT may receive IP based services provided by the DBN. The DBN is based on DVB, and the transmission of the DBN includes elementary streams (ES). This transmission may also be based on time division transmissions and non time division transmissions. Before the transfer, the data is processed in the DBN. The DBN includes means for changing the transmissions it sends. The DBN provides a time division identifier descriptor as described above in the example of Table 1. The EUT may obtain a time division identifier descriptor from the transmission and receive time division streams. Thus, the EUT may identify elementary streams that are time-divided from the transmission and non-time-divided elementary streams. In addition, based on the time division identifier descriptor, the EUT may have additional information about the transmitted elementary streams. The EUT does not necessarily need to change in advance for such descriptors and such transmissions, but they can be processed while receiving broadcast transmissions. The EUT does not require any interaction to identify time division elementary streams and non time division elementary streams. It is preferred that the DBN transmission is a wireless or mobile transmission for the EUT based on DVB-T. Thus, data can be transmitted wirelessly.

With continued reference to the example of FIG. 4, head ends (HEs) including IP encapsulators perform multi-protocol encapsulation (MPE) and convert IP data into MPEG-TS (Moving Picture Experts Group-Transport Stream) based data. Place in containers. HEs perform the creation of tables, the linking of tables, and the alteration of tables.

According to some embodiments, the operation of the IP encapsulators may involve placing the received data into UDP packets, which are then enclosed in the IP packets and again enclosed in the DVB packets. Details of this multiprotocol encapsulation technique can be found, for example, in the standard document EN 301 192, incorporated herein by reference. At the application layer, the available protocols include, for example, unidirectional HTTP (UHTTP), Real-Time Streaming Protocol (RTSP), Real-time Transport Protocol (RTP), Service Announcement Protocol / Service Description Protocol (SAP), and FTP. Include.

In some other embodiments, IP encapsulation utilizes Internet Protocol Security (IPSEC) to ensure that the content can only be used by the receivers with the appropriate credential. During the encapsulation process, a unique identifier may be added to at least one of the headers. For example, when UHTTP is used, a unique identifier may be encoded in the UHTTP header under the UUID field. Thus, in certain embodiments, in order to perform data transfer to a particular terminal or group of terminals, the containers may also be identified and read by a potential accessor element of the receiver to determine whether the data is intended for that terminal. Can be informed. Alternatively, to provide data transmission to a plurality of terminals, multicast can be used, preferably a single sender can contact several receivers. Virtual private networks (VPNs) may also be formed in the DBN's system, and in the receiver. A predetermined bandwidth of DBN broadcasting is allocated for point-to-point (one-to-one), or point-to-multipoint (one-to-many) communication from the DBN to the receiver. The DBN may also include various transport channels for other execution streams. The receiver performs multiprotocol decapsulation to generate IP data packets.

The DVB packets thus generated are transmitted over the DVB data link. The EUT digitally receives broadcast data. The EUT receives a time division identifier descriptor and also receives time division elementary streams and non time division elementary streams. The EUT may identify time division elementary streams and non-time division elementary streams based on the descriptor, and may also obtain additional information about the transmitted time division elementary streams from the descriptor. Thus, the EUT looks for services or certain sessions, categories of a service, focuses on time-divided streams, knows which streams are not time-divided if necessary, and time-partitioned streams and their functions and characteristics. You can get information about The EUT may provide a service or part of a service to a user. When a transmission rate is specified by a provider, it will follow that rate.

5 has been described above. Corresponding reference numerals are used below for corresponding components. The example of FIG. 5 shows an operational block diagram of an apparatus, also called an end user terminal (EUT) or alternatively a receiver. The EUT of FIG. 5 may be used in any or all of the above example (s). The EUT includes a processing unit CPU, a wideband receiver, also referred to as a multi-carrier signal receiver, capable of receiving multi-carrier wideband signals such as DVB-T signals, and a user interface UI. The wideband receiver and the user interface UI are connected to the processing unit CPU. The user interface UI has 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 playing back audio signals. The user interface UI may also include a voice recognition unit (not shown). The processing unit CPU comprises a microprocessor (not shown), a memory and possibly a software SW (not shown). Software SW can be stored in memory. Based on the software SW, the microprocessor receives the elementary stream, identifies the elementary stream based on the time division identifier descriptor, displays the output in the user interface UI, reads the input received from the user interface UI, and so on. Control receiver behavior. These operations are described in the examples of FIGS. 1-4, 6-8 and Tables 1-5. For example, hardware (not shown) may include means for detecting a signal, demodulation means, time division identifier descriptor detection means, means for finding an elementary stream, means for identifying elementary streams that are time division or not, time division upon receipt. Means for applying, means for reading information about the basic scans from the descriptor. In addition, the CPU can control the availability of the memory of the EUT. This availability is the time-to-time checked by the CPU (EH is defined according to the planned transmission of the services) of the maximum size of the services included in the burst to make the decision to switch the receiver on or keep the receiver on. Is compared with information. Preferably, the memory of the EUT can be reduced by the comparison result.

With continued reference to FIG. 5, as optional, middleware or software configurations may be used (not shown). The EUT may be a handheld device that a user can conveniently carry. Preferably, the EUT may be a cellular mobile phone comprising a broadcast receiver or a multi-carrier signal receiver for receiving DVB-T broadcast transport streams (this is shown as a dashed block in FIG. 5, which is merely an alternative option). Just a). Thus the EUT may possibly interact with service providers.

The example of FIG. 6 illustrates the method in the form of a flowchart identifying time division elementary streams. The DBN is activated and the EUT is switched on to receive broadcast transmissions (step 600). The EUT identifies the SI / PSI tables and obtains information about all published streams (step 601). The time division identifier descriptor is included in the SI / PSI tables so that the EUT eventually finds the descriptor (step 602). The EUT also obtains information about all published time division streams. Examples of descriptors are described in the examples in Table 1-5 above. The EUT also receives the elementary streams of the wideband transmission of the DBN. Based on the descriptor, the EUT may separate or classify the time division streams and the non time division streams (step 603). In particular, the EUT can find the elementary streams transmitted under the time division principle. The EUT may apply the time division power reduction principle when receiving a broadcast. The descriptor also provides additional information about the received elementary streams, time-divided, to the EUT (step 604). Examples of information provided are described in Tables 2-5 and FIGS. 1-5.

The example of FIG. 7 shows in a flowchart form a method of separating time division elementary streams. The DBN operates and the EUT is switched on to receive the broadcast transmission (step 700). The EUT identifies the SI / PSI tables and obtains information about all published streams (step 701). The time division identifier descriptor is included in the SI / PSI tables so that the EUT finds the descriptor (step 702), and the EUT also obtains information about all published time division streams. Examples of descriptors are described as the examples in Table 1-5 above. The EUT also receives the elementary streams of the wideband transmission of the DBN. Based on the descriptor, EUt may separate the time-divided and non-time-divided streams (step 703). In particular, the EUT may discover elementary streams transmitted under the time division principle. The EUT may apply the principle division power reduction principle when receiving the broadcast (step 704). In addition, the descriptor provides the EUT with additional information about the received elementary streams, which are time-divided (step 705). Examples of information provided are shown in Tables 2-5 and FIGS. 1-5. In addition, the EUT may optionally receive a stream that is not time-divided (step 706).

The example of FIG. 8 depicts, in flow chart form, a method for classifying DVB transmitted streams. The DBN works and processes the data for DVB transmission (step 800). The DBN provides SI / PSI data in transmission (step 801). The time division identifier descriptor is included in the SI / PSI tables, and is eventually provided through transmission for all time divided streams (step 802). Examples of descriptors are described in Table 1-5 above. The DBN also transmits time division streams and possibly non time division streams (step 803). Based on the descriptor, the DBN classifies time-division and non-time-division streams. In particular, the EUT can find the elementary streams transmitted under the time division principle. The EUT may apply the time division power reduction principle when receiving a broadcast. EH, the descriptor provides the EUT with additional information about the received elementary streams that are time-divided. Examples of information provided are shown through the examples in Tables 1-5 and FIGS. 1-5.

Some embodiments of the invention are implemented in the network system of FIG. 4 operating the method referenced above through the examples of FIGS. 1-3 and 5-8. The invention may also be practiced in the receiver device of FIG. 5 operating the examples of FIGS. 1-4 and 6-8 above. Preferably the receiver can focus on streams of DVB transmissions on which the receiver can apply power saving principles. The receiver should be able to interpret the defined descriptors only by using equivalent means such as those used to receive and identify other descriptors of digital broadcasting. Some embodiments of the present invention support the portable reception of IP datacast receivers and, if possible, have effect on mobile handheld receivers. The performance of the embodiments raises the advantages of the present invention, such as economy. For example, DVB-T provides an effective and inexpensive way of distributing data, and embodiments improve the low power consumption reception scheme for broadcast data streams, even when working with non-power consumption based broadcast systems. Let's do it.

Specific embodiments and embodiments of the invention have been described. Those skilled in the art will appreciate that the present invention is not limited to the details of the embodiments described above, and that the present invention may be implemented through other embodiments using equivalent means without departing from the features thereof. . It is intended that the scope of the invention only be limited by the appended claims. After all, options for implementing the invention, including equivalents, are also within the scope of the invention.

Claims (61)

In the method for receiving a digital broadband transmission for power saving of the receiver, Providing information indicative of a maximum burst duration; Based on the provision information, detecting a portion configured to meet power savings in a receiver; And Switching on / off at least a portion of a receiver based on the provided information. 2. The method of claim 1 wherein the information indicative of the maximum burst duration is signaled through a time division identifier descriptor. 3. The method of claim 2, wherein the time division identifier descriptor is included in one or more program specific information or service information tables. 4. The method of claim 3, wherein the one or more program specific information or service information tables comprise a network information table, a program map table, and an IP / MAC notification table. 2. The method of claim 1, wherein the information indicative of the maximum burst duration is used to save power when the remainder of the burst is lost. 2. The method of claim 1 wherein the digital wideband transmission comprises multi-carrier signal transmission. 2. The method of claim 1 wherein the digital wideband transmission comprises a DVB transmission. 8. The method of claim 7, wherein the DVB transmission comprises a DVB-T transmission. 2. The method of claim 1 wherein the digital wideband transmission comprises a wireless digital wideband transmission. 10. The method of claim 9, wherein said wireless digital transmission comprises a mobile DVB-T transmission. What is claimed is: 1. A method for transmitting digital wideband transmission for power saving of a receiver, Providing information indicative of a maximum burst duration; And And classifying the portion configured to correspond to power savings at the receiver based on the provided information, so as to switch on / off at least a portion of the receiver according to the provided information. 12. The method of claim 11, wherein the information representing the maximum burst duration is signaled through a time division identifier descriptor. 13. The method of claim 12 wherein the time division identifier descriptor is included in one or more program specific information or service information tables. 15. The method of claim 13, wherein the one or more program specific information or service information tables comprise a network information table, a program map table, and an IP / MAC notification table. A data processing system for receiving a digital wideband transmission for power saving of a receiver, An information provider for providing information indicating a maximum burst duration; A detector configured to detect a portion configured to meet power savings in the receiver based on the provided information; And And a switching unit to switch on / off at least a part of the receiver based on the provided information. A computer-readable recording medium storing a computer program, adapted to perform the steps of the method according to claim 1 when executed on a computer. delete A computer readable medium comprising program code adapted to perform the method of claim 1 when executed on a computer. delete A system for providing digital broadband transmission for power saving of a receiver, Means for providing information indicative of a maximum burst duration; Means for detecting, based on the provided information, a portion configured to match power savings in a receiver; And Means for switching on / off at least a portion of a receiver based on the provided information. 21. The system of claim 20, wherein the information indicative of the maximum burst duration is signaled through a time division identifier descriptor. 22. The system of claim 21, wherein the time division identifier descriptor is included in one or more program specific information or service information tables. 23. The system of claim 22, wherein the one or more program specific information or service information tables comprise a network information table, a program map table, and an IP / MAC notification table. A receiver for receiving a digital broadband transmission for power saving of a receiver, Means for receiving information indicative of a maximum burst duration; Means for detecting, based on the received information, a portion configured to meet power savings in a receiver; And Means for switching on / off at least a portion of a receiver based on the received information. 25. The receiver of claim 24 wherein the information indicative of the maximum burst duration is signaled through a time division identifier descriptor. 27. The receiver of claim 25 wherein the time division identifier descriptor is included in one or more program specific information or service information tables. 27. The receiver of claim 26 wherein the one or more program specific information or service information tables comprise a network information table, a program map table, and an IP / MAC notification table. 25. The receiver of claim 24 wherein the receiver further comprises a mobile DVB-T receiver. 29. The receiver of claim 28, wherein the information indicative of the maximum burst duration is used for power saving of the receiver when the remainder of the burst is lost. 29. The receiver of claim 28, wherein the receiver further comprises a mobile station for interaction with a digital broadcast transmission. A transmitter for transmitting a digital wideband transmission for power saving of a receiver, Means for providing information indicative of a maximum burst duration; And Means for classifying a portion adapted to meet power savings in the receiver based on the provided information, so as to switch on / off at least a portion of the receiver in accordance with the provided information. 32. The transmitter of claim 31 wherein the information indicative of the maximum burst duration is signaled through a time division identifier descriptor. 33. The transmitter of claim 32 wherein the time division identifier descriptor is included in one or more program specific information or service information tables. 34. The transmitter of claim 33 wherein the one or more program specific information or service information tables comprise a network information table, a program map table, and an IP / MAC notification table. A data processing system for transmitting digital wideband transmission for power saving of a receiver, An information provider for providing information indicating a maximum burst duration; And And a classifying unit for classifying a portion configured to correspond to power savings in the receiver based on the provided information, so as to switch on / off at least a portion of the receiver according to the provided information. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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