KR20120069179A - Apparatus for single transmission broadcasting service - Google Patents

Abstract

PURPOSE: An apparatus for single transmission broadcasting service without needing an ETI input signal process is provided to efficiently construct a transmission system through a multiplexer and a transmitter. CONSTITUTION: An MSC(Main Service Channel) generating unit(207) generates an MSC which is necessary for each transmission frame. An FIC(Fast Information Channel) generating unit(209) generates an FIC based on MCI and SI information which is received from an multiplex managing unit. A transmission frame configuring unit(211) configures a transmission frame to the MSC which is generated from the MSC generating unit. A DMB(Digital Multimedia Broadcasting) modulating unit(213) receives the transmission frame from the transmission frame configuring unit.

Description

Device for single transmission broadcasting service {APPARATUS FOR SINGLE TRANSMISSION BROADCASTING SERVICE}

The present invention relates to an apparatus for effectively providing a single transmission broadcast service.

There exists a single transmission broadcast service such as terrestrial DMB-based low power or local broadcast service. This single transmission broadcast service transmits a broadcast signal to one transmitter.

An ensemble multiplexer is used to configure multiple services into one ensemble in a terrestrial DMB broadcasting network.

1 is a diagram illustrating a transmission network of a conventional terrestrial DMB broadcast including an ensemble multiplexer.

As shown in FIG. 1, the ensemble multiplexer 30 may receive service data from the plurality of service encoders 10, 12, 14 via the collection network 20. The service encoder includes a video service encoder 10, an audio service encoder 12, and a data service encoder 14. The ensemble multiplexer 30 multiplexes the service data received from the plurality of service encoders 10, 12, and 14 and generates a multiplexed signal according to the Ensemble Transport Interface (ETI) standard. The ensemble multiplexer 30 then outputs the terrestrial DMB broadcast through the distribution network 40 to the COFDM encoder of the transmitter 50.

Here, the ensemble multiplexer 30 is the core of the terrestrial DMB transmission system, and its output, ETI, is a basic interface in the terrestrial DMB transmission network, and additionally with a base layer ensemble which maintains compatibility with terrestrial DMB using layer modulation technology. It is also used in AT-DMB, which carries the enhancement layer ensemble.

ETI is defined by three layers: a logical interface (LI) layer, a network independent (NI) layer, and a network adaptation (NA) layer. The LI layer is a basic logical structure that defines enough information to generate an ensemble. The NI layer is a simple physical interface layer that maps LIs and is used as the primary interface for ETI-related devices. The NA layer is an error-protected physical interface for use in an error-prone network environment, which is also mapped to LI. That is, LI, which is a core data part, is the same between LI, NI, and NA, and can be converted to each layer.

2 shows a structure of a LI frame which is a common part of the ETI. The important data is LIDATA, and the frame characterization (FC) is a field indicating the characteristics of the frame, and the stream characterization (STC) indicates the structure information of the subchannel, and the main stream data (MST) indicates the fast information channel (FIC) and the subchannel to be actually transmitted. Indicates.

3 is a diagram illustrating a structure of a transmission frame for transmitting an ensemble that is a bundle of terrestrial DMB services. The terrestrial DMB ensemble transmission frame includes a synchronization channel (SC), a fast information channel (FIC), and a main service channel (MSC).

The synchronization channel is a channel for transmitting information for decoding on a digital communication, and has a certain form defined to recognize that the DMB receiver is the beginning of a frame. The fast information channel is a channel that transmits information on actual data transmitted in the MSC through the MSC, and information required for receiving a terrestrial DMB transmission signal. One or more fast information blocks (FIB) are provided. It consists of. The primary service channel is a channel through which actual data such as video data and audio data are transmitted, and is composed of one or more common interleaved frames (CIFs).

The configuration or length of such a transmission frame depends on its transmission mode. In the terrestrial DMB system, the transmission mode is provided to provide a transmission mode irrespective of the type of data transmitted through the high-speed information channel and the main service channel. As described above, fast information blocks and common interleaved frames are introduced.

That is, data is transmitted in units of a fast information block (FIB) or a common interleaved frame (CIF) regardless of a transmission mode. However, it is only necessary to specify the number of FIB and CIF input according to the transmission mode. [Table 1] shows an example of the configuration of transmission frames for each transmission mode of a terrestrial DMB system.

Transmission mode Frame length FIB per transmission frame CIF per frame I 96 ms 12 4 II 24 ms 3 One III 24 ms 4 One IV 48 ms 6 2

Ensemble Transport Interface (ETI) is an interface that transmits information for configuring an ensemble for terrestrial DMB broadcasting. In transmission mode I, as shown in Table 1, four ETI frames constitute one transmission frame every 96ms to provide OFDM signals. send.

In conclusion, the multiplexer configures the information necessary for composing the transport frame in the main stream data (MST) of the ETI, and the transmitter extracts the FIC field part from the MST of the ETI, constructs the FIC of the transport frame, and extracts each subchannel. Configure the MSC of the frame.

Accordingly, the present invention efficiently integrates multiplexers and transmitters in a limited case where a multiplexer and a transmitter are located at the same site when attempting a broadcast service with a single transmission (one transmitter), such as a terrestrial DMB-based low power and local broadcasting service. The purpose is to provide a device for building.

In order to achieve the above object of the present invention, the present invention provides an apparatus for a single transmission broadcast service, comprising: an input processor for analyzing subchannels of an input to output subchannel analysis information, and extracting and outputting a stream of each subchannel; And a subchannel of an ensemble, a service, a service component, and a subchannel stream of an input selected in an output ensemble configuration using subchannel analysis information from the input processing unit as subchannels of an output ensemble. A multiplexing management unit that generates MCI (multiplex configuration information), service information (SI) information, and subchannel configuration information according to the configuration, and receives a stream of each subchannel from the input processing unit and receives the subchannel configuration received from the multiplexing management unit. Sub required to configure the output ensemble according to the information and multiplexing setup information (MCI) A main service channel required for each transport frame by configuring a subchannel manager for outputting a null stream and a subchannel stream received from the subchannel manager by common interleaved frames (CIF) according to a predetermined setting. Channel: MSC generation unit for generating MSC, FIC generation unit for generating and outputting a fast information channel (FIC) based on the MCI and SI information received from the multiplexing management unit 203, and generated in the FIC generation unit A transmission frame configuration unit for constructing and outputting a transmission frame using the generated FIC and the MSC generated by the MSC generation unit, and a DMB for receiving the transmission frame from the transmission frame configuration unit and generating and transmitting a DMB broadcast signal for the transmission frame. It includes a modulator.

The present invention provides an apparatus for integrating an ensemble multiplexer and a transmitter function by multiplexing an ensemble by receiving inputs from various service encoders and outputting a broadcast signal instead of an ETI, similarly to a conventional ensemble multiplexer. Since the ETI network between the ensemble multiplexer and the transmitter is eliminated, the ETI output signal generation process of the multiplexer and the ETI input signal processing process of the transmitter are unnecessary.

The present invention is equally applicable to the combination of an AT-DMB (Advanced T-DMB) ensemble multiplexer and a transmitter based on terrestrial DMB.

1 is a diagram illustrating a transmission network of a conventional terrestrial DMB broadcast including an ensemble multiplexer.
2 shows a structure of a LI frame which is a common part of the ETI.
3 is a diagram illustrating a structure of a transmission frame for transmitting an ensemble that is a bundle of terrestrial DMB services.
4 is a block diagram of an apparatus integrating a multiplexer and a transmitter according to an embodiment of the present invention.
5 is a block diagram of an apparatus integrating a multiplexer and a transmitter according to another embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a block diagram of an apparatus integrating a multiplexer and a transmitter according to an embodiment of the present invention.

The apparatus integrating the multiplexer and the transmitter includes an input processor 201, a multiplex manager 203, a subchannel manager 205, an MSC generator 207, an FIC generator 209, a transmission frame constructer 211 and a T. And a DMB modulator 213.

The input processing unit 201 receives and processes the output of each service encoder in the same manner as the existing multiplexer. In detail, the input processing unit 201 analyzes the subchannels of the input, provides the subchannel analysis information to the multiplexing management unit 203, extracts the streams of each subchannel, temporarily stores them in a buffer, and then stores the subchannel management unit 205. To pass on.

The multiplexing manager 203 performs the function of configuring an ensemble, a service, a service component and a subchannel similarly to the existing multiplexer, and uses the subchannel analysis information provided by the input processor 201 to serve as a sub of the input selected for the output ensemble configuration. The channel stream is composed of subchannels of the output ensemble. In addition, the multiplexing management unit 203 generates MCI (multiplex configuration information) and service information (SI) information according to the configuration of the set ensemble, transfers them to the FIC generation unit 209 as FIG, and the subchannel configuration information and the multiplexing setting information. The MCI is transmitted to the subchannel manager 205.

The subchannel manager 205 receives the stream of each subchannel from the input processor 201 and receives the subchannel configuration information and the multiplex setting information (MCI) from the multiplexing manager 203. The subchannel manager 205 delivers the subchannel stream necessary for output ensemble configuration to the MSC generator 207 according to the subchannel configuration information and the multiplexing setup information (MCI).

The MSC generator 207 configures the subchannel stream received from the subchannel manager 205 into CIFs according to a predetermined setting to generate MSCs (four CIFs of 96ms in the transmission mode I) required for each transmission frame.

The FIC generation unit 209 receives multiplex configuration information (MCI) and service information (SI) information from the multiplexing management unit 203, and generates a fast information channel (FIC) based on the information to the transmission frame configuration unit 211. Output

The transmission frame configuration unit 211 configures a transmission frame using the FIC generated by the FIC generation unit 209 and the MSC generated by the MSC generation unit 207, and transfers the transmission frame to the T-DMB modulator 213. The T-DMB modulator 213 receives a transmission frame from the transmission frame configuration unit 211 and generates and transmits a T-DMB broadcast signal for the transmission frame.

Conventional multiplexers generally output an ETI signal by encoding it into an ETI frame when the FIC and the subchannel are configured, but in the present invention, the EIC frame is configured to be transmitted to a transmission frame configuration for transmission without generating and outputting the ETI frame, which is then broadcast directly from the modulator. Generating and outputting the signal can be extended to AT-DMB as shown in FIG.

5 is a block diagram of an apparatus integrating a multiplexer and a transmitter according to another embodiment of the present invention.

For AT-DMB, the base layer ensembles and the enhancement layer ensembles are transmitted in a transmission frame for each layer, and the AT-DMB modulator is hierarchically modulated to output an AT-DMB signal. To this end, as shown in FIG. 5, the integrated structure proposed by the present invention is extended for each layer to configure the transmission frame for each layer through the FIC generation unit, the MSC generator, and the transmission frame configuration unit for each layer, and the AT-DMB modulator. This allows for multiplexer and transmitter integration for AT-DMB.

To this end, an apparatus integrating a multiplexer and a transmitter according to another embodiment of the present invention includes an input processor 301, a base layer multiplexing manager 203, an enhancement layer multiplexing manager 313, a subchannel manager 205, and a base layer MSC. Generation unit 307, enhancement layer MSC generation unit 317, base layer FIC generation unit 309, enhancement layer FIC generation unit 319, base layer transmission frame configuration unit 311, enhancement layer transmission frame configuration unit ( 321, an AT-DMB modulator 323.

The input processor 301 receives and processes the output of each service encoder. In detail, the input processor 301 analyzes the subchannels of the input and provides the subchannel analysis information to the base layer multiplexing manager 303 and the enhancement layer multiplexing manager 313. In addition, the input processor 301 extracts a stream of each subchannel, temporarily stores it in a buffer, and delivers the stream to the subchannel manager 305.

The base layer multiplexing management unit 303 performs a function of configuring a base layer ensemble, a service, a service component, and a subchannel. The enhancement layer multiplexing management unit 313 performs a function of configuring an enhancement layer ensemble, a service, a service component, and a subchannel.

In addition, the base layer multiplexing management unit 303 and the enhancement layer multiplexing management unit 313 use the subchannel analysis information provided by the input processing unit 301 to output the subchannel stream of the input selected for the base layer ensemble configuration and the enhancement layer ensemble configuration. Are connected to the subchannels of the output base layer and enhancement layer ensembles, respectively. In addition, the base layer multiplexing management unit 303 and the enhancement layer multiplexing management unit 313 are configured with the base layer multiplex configuration information (MCI), the enhancement layer MCI, and the base layer service information (SI) according to the configuration of the base layer and enhancement layer ensemble set, respectively. And enhancement layer SI information are generated and transmitted to the base layer FIC generation unit 309 and the enhancement layer FIC generation unit 319, respectively, and the base layer and enhancement layer subchannel configuration information, and the base layer and enhancement layer multiplexing setting information (MCI). ) Is transmitted to the subchannel manager 305, respectively.

The subchannel manager 305 receives the stream of each subchannel from the input processor 201 and receives the base layer and enhancement layer subchannel configuration information and the base layer from the base layer multiplexing manager 303 and the enhancement layer multiplexing manager 313. And enhancement layer multiplexing configuration information (MCI). The subchannel manager 305 may generate a subchannel stream necessary for output base layer and enhancement layer ensemble configuration according to the base layer and enhancement layer subchannel configuration information and base layer and enhancement layer multiplexing configuration information (MCI). 307 and the enhancement layer MSC generator 317, respectively.

The base layer MSC generation unit 307 configures the subchannel stream received from the subchannel management unit 305 into CIF according to a predetermined base layer setting to generate an MSC required for each transmission frame. The enhancement layer MSC generation unit 317 configures the subchannel stream received from the subchannel management unit 305 into CIF according to a predetermined enhancement layer setting to generate an MSC required for each transmission frame.

The base layer FIC generation unit 309 receives base layer MCI and SI information from the base layer multiplexing management unit 303, and generates a base layer fast information channel (FIC) based on the base layer multiplexing management unit 303. Will output The enhancement layer FIC generation unit 319 receives enhancement layer MCI and SI information from the enhancement layer multiplexing management unit 313, and generates an enhancement layer FIC (fast information channel) based on the enhancement layer transmission frame configuration unit 321. Will output

The base layer transmission frame configuration unit 311 configures a transmission frame with the FIC generated by the base layer FIC generation unit 309 and the MSC generated by the base layer MSC generation unit 307 and transmits the transmission frame to the AT-DMB modulator 323. To pass. The enhancement layer transmission frame configuration unit 321 configures a transmission frame using the FIC generated by the enhancement layer FIC generation unit 319 and the MSC generated by the enhancement layer MSC generation unit 317 to the AT-DMB modulation unit 323. To pass.

The AT-DMB modulator 323 receives transmission frames from the base layer transmission frame configuration unit 311 and the enhancement layer transmission frame configuration unit 321, respectively, and generates and transmits an AT-DMB broadcast signal for the transmission frame. .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

201: input processing unit
203: multiplexing management unit
205: subchannel management unit
207: MSC generator
209: FIC generator
211: transmission frame configuration
213: T-DMB modulator

Claims (1)

In the apparatus for a single transmission broadcast service,
An input processor for analyzing subchannels of the input and outputting subchannel analysis information, extracting and outputting a stream of each subchannel;
Comprising an ensemble, a service, a service component and a subchannel, and using the subchannel analysis information from the input processing unit, a subchannel stream of the input selected in the output ensemble configuration is configured as a subchannel of the output ensemble, and in the output ensemble configuration. A multiplexing management unit configured to generate multiplex configuration information (MCI), service information (SI) information, and subchannel configuration information;
A subchannel manager for receiving a stream of each subchannel from the input processor and outputting a subchannel stream necessary for output ensemble configuration according to the subchannel configuration information and the multiplexing setup information (MCI) received from the multiplexing manager;
MSC generation unit for generating a main service channel (MSC) required for each transport frame by configuring the sub-channel stream received from the sub-channel management unit as a common interleaved frame (CIF) according to a predetermined setting Wow,
An FIC generation unit generating and outputting a fast information channel (FIC) based on the MCI and SI information received from the multiplexing management unit 203;
A transmission frame configuration unit for constructing and outputting a transmission frame by using the FIC generated by the FIC generation unit and the MSC generated by the MSC generation unit;
And a DMB modulator for receiving a transport frame from the transport frame configuration unit and generating and transmitting a DMB broadcast signal for the transport frame.

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