CN101715637B - Method of multiplexing transmission frame of digital broadcasting signal, apparatus for multiplexing transmission frame, and transmitting apparatus - Google Patents
Method of multiplexing transmission frame of digital broadcasting signal, apparatus for multiplexing transmission frame, and transmitting apparatus Download PDFInfo
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- CN101715637B CN101715637B CN2008800213049A CN200880021304A CN101715637B CN 101715637 B CN101715637 B CN 101715637B CN 2008800213049 A CN2008800213049 A CN 2008800213049A CN 200880021304 A CN200880021304 A CN 200880021304A CN 101715637 B CN101715637 B CN 101715637B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
- H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23602—Multiplexing isochronously with the video sync, e.g. according to bit-parallel or bit-serial interface formats, as SDI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23614—Multiplexing of additional data and video streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
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- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
In a terrestrial DMB, a transmitting apparatus multiplexes a plurality of service streams generated for any service to a plurality of ensembles. In this case, the same sending time data is constructed in a time stamp field of each frame for each of a plurality of ensembles. With this configuration, a plurality of transmitting apparatuses can send a plurality of transmission frames including service streams for the same service at the same point of time, and thus receiving apparatuses can actually receive a plurality of transmission frames at the same point of time.
Description
Technical field
The present invention relates to the method for the transmission frame of complex digit broadcasting signal, equipment and the transmitting apparatus of multiplexing transmission frame.More particularly, the present invention relates to the method for the transmission frame of such complex digit broadcasting signal, equipment and the transmitting apparatus of multiplexing transmission frame, it can be broadcasted at terrestrial digital multimedia in (DMB) at same time point and send each transmission frame in a plurality of ensembles of the service flow that comprises same services.
The present invention is by the IT R﹠amp of MIC/IITA; D project (2006-S-017-02, the technological development (Development of Technology for Advancement of TerrestrialDMB Transmission) of the development of land DMB transmission) is supported.
Background technology
Terrestrial digital multimedia broadcasting (DMB) is the multimedia service that the image quality of the stereo-quality of compact disk (CD) level (range) and video level is provided by very high frequency band (bandwidth of about 1.5MHz) in mobile communication.
Usually, according to land DMB system, transmitting apparatus is multiplexed with ensemble (ensemble) with each service flow of a plurality of different services, and sends transmission frame on the basis of ensemble.Then, transmission frame is modulated by Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) encoder, and is sent out as the DMB broadcast singal.
Simultaneously, when transmitting apparatus sent a plurality of transmission frame that comprises a plurality of service flow that produce about any service, receiving equipment need to receive whole a plurality of transmission frames of the service frame that comprises respective service, so that service is offered the user.Therefore, receiving equipment need to comprise the large capacity buffer that can store a plurality of transmission frames.In addition, receiving equipment is decoded a large amount of time of cost to a plurality of service flow that are multiplexed with a plurality of transmission frames.
Only be used for raising to the understanding of background of the present invention in the disclosed above-mentioned information of background technology part, therefore can comprise the information that does not consist of prior art known to persons of ordinary skill in the art.
Summary of the invention
Technical problem
The object of the present invention is to provide a kind of method of multiplexing transmission frame, equipment and the transmitting apparatus of multiplexing transmission frame, it has advantages of such: send each transmission frame in a plurality of ensembles of the service flow comprise same services at same time point.
Technical scheme
Exemplary embodiment of the present invention provides a kind of equipment of multiplexed frame.Described equipment comprises: the first buffer, the first service stream that storage sends from the outside; The second buffer, the second service stream that storage sends from the outside; The time comparator is to comparing about the first service time data of first service stream and the second service time data that flows about second service; The first frame generator, output comprise from the first frame of the first service stream of the first buffer output; The second frame generator, output comprise from the second frame of the second service stream of the second buffer output; Timestamp generator, the first transmitting time data that generation will be configured in the timestamp field of the first frame and the second transmitting time data that will in the timestamp field of the second frame, be configured.In the case, if first service time data and second service time data are mutually the same, then the timestamp generator can be produced as identical data with the second transmitting time data with the first transmitting time data.
The first transmitting time data can be used for determining to send the time point of the first frame, and the second transmitting time data can be used for determining to send the time point of the second frame.
If first service time data and second service time data are mutually the same, then the time comparator can carry out the time point of the first buffer output first service stream and the time point of the second buffer output second service stream synchronously.
Described equipment also can comprise: global positioning system (GPS) receiver, and from the standard time of at least one satellite reception for generation of the first transmitting time data and the second transmitting time data.Described equipment also can comprise: the first buffer o controller, according to the output of the sequencing control first service of first service time data and second service time data stream; The second buffer o controller is according to the output of described sequencing control second service stream.Described equipment also can comprise: very first time information extractor, from first service stream identification first service time data; The second temporal information extractor is from second service stream identification second service time data.
Another embodiment of the present invention provides a kind of method of multiplexed frame.Described method comprises: storage comprises a plurality of service flow of first service stream and second service stream in the first buffer and the second buffer; Detect each data service time of described a plurality of service flow; To mutually comparing with described a plurality of service flow corresponding a plurality of service time of data; Generation comprises the first frame of first service stream; Generation comprises the second frame of second service stream; If flow corresponding first service time data and to flow corresponding second service time data identical with being stored in second service in the second buffer with the first service in being stored in the first buffer, then produce the first transmitting time data that will in the timestamp field of the first frame, be configured and the second transmitting time data that will in the timestamp field of the second frame, be configured, as identical data.
Described method also can comprise: if first service time data and second service time data are mutually the same, then at identical time point output first service stream and second service stream.
Described method also can comprise: the time that time that first service stream keeps in the first buffer and second service stream keep in the second buffer is set, thereby flows at identical time point output first service stream and second service.
Described method also can comprise: if first service time data and second service time data are mutually the same, then produce the first frame and the second frame at identical time point.Described method also can comprise: according to the sequential output and the corresponding a plurality of frames of described a plurality of service flow of described a plurality of service time of data.
Another embodiment of the present invention provides a kind of transmitting apparatus.Described transmitting apparatus comprises: the first transmitter receives the first frame, and sends the first frame according to the first transmitting time data in the timestamp field of the first frame from the outside; The second transmitter receives the second frame from the outside, and sends the second frame according to the second transmitting time data in the timestamp field of the second frame.In the case, the first transmitter and the second transmitter are driven independently.
If the first transmitting time data and the second transmitting time data are mutually the same, then to send the time point of the first frame identical with the time point that the second transmitter sends the second frame for the first transmitter.Described transmitting apparatus also can comprise: gps receiver, and from the standard time of at least one satellite reception for identification the first transmitting time data and the second transmitting time data.
The first transmitter can be with identical modulating frequency transmitted signal with the second transmitter.The first transmitter can be with different modulating frequency transmitted signals with the second transmitter.
Beneficial effect
According to embodiments of the invention, although other field is not provided, comprise that a plurality of transmission frames of the service flow of same services can synchronously be sent in transmission frame.Therefore, the service that has such low capacity and be not multiplexed with the individual signals group can be provided, and not provide large capacity buffer at receiving equipment, and relatively not increase a plurality of service flow are decoded the needed time.
Description of drawings
Fig. 1 illustrates the according to an exemplary embodiment of the present invention block diagram of DMB (DMB) transmission system;
Fig. 2 is the diagram of the hierarchy of schematically illustrated according to an exemplary embodiment of the present invention ensemble coffret (ETI);
Fig. 3 is the diagram that illustrates with the structure of the corresponding frame of the logic interfacing (LI) of ensemble coffret (ETI) layer;
Fig. 4 is the diagram of the DMB system of schematically illustrated formation Single Frequency Network (SFN);
Fig. 5 illustrates the according to an exemplary embodiment of the present invention flow chart of the method for multiplexed frame;
Fig. 6 illustrates the according to an exemplary embodiment of the present invention block diagram of the equipment of multiplexed frame;
Fig. 7 illustrates the according to an exemplary embodiment of the present invention diagram of frame synchronization transmitting apparatus.
Embodiment
In the following detailed description, only be that the form that illustrates illustrates and describe certain exemplary embodiments of the present invention.As those skilled in the art cognitive, in the situation that do not break away from the spirit or scope of the present invention, can revise the embodiment that describes with various form.Therefore, can be considered in fact be illustrative and nonrestrictive to drawing and description.Run through specification, identical label represents identical element.
In addition, unless offering some clarification on of opposite meaning arranged, term " comprises " and is out of shape the element that will be understood to represent to comprise statement, and do not get rid of any other element.Here use term " part ", " ... device (device) " or " module " expression to process the unit of at least one function or operation.It can be realized by hardware, software or their combination.
Describe the method for the frame of complex digit broadcasting signal according to an exemplary embodiment of the present invention, equipment and the transmitting apparatus of multiplexing transmission frame in detail now with reference to accompanying drawing.Land DMB is multiplexed with ensemble, modulation and transmitted signal group's transmission frame with the service flow of Video service, audio service or data, services each according to an exemplary embodiment of the present invention.
Fig. 1 illustrates the according to an exemplary embodiment of the present invention block diagram of DMB transmission system.
As shown in Figure 1, the DMB transmission system comprises: Video service encoder 110, audio service encoder 120, data, services encoder 130, be used for multiplexed signals group's equipment 200 (below, be called " ensemble multiplexing equipment " or " frame multiplexing equipment ") and transmitting apparatus 300.
Video service encoder 110 provides Video service, and audio service encoder 120 provides audio service, and data, services encoder 130 provides data, services.Each of Video service encoder 110, audio service encoder 120 and data, services encoder 130 operated by the ISP.Each encoder is converted to service flow with service, and by network service flow is sent to ensemble multiplexing equipment 200.
Transmitting apparatus 300 is operated by the transmission network supplier.Transmitting apparatus 300 is modulated the ETI frame that sends from ensemble multiplexing equipment 200 by network according to Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) scheme, and the transmission frame of modulation is sent to each terminal.At this moment, transmitting apparatus 300 can send transmission frame at identical time point.The transmission frame that sends at identical time point can be by the identical modulating frequency of use Single Frequency Network (SFN) or use the multi-frequency network of different modulating frequencies to be sent out.
Fig. 2 is the diagram of the hierarchy of schematically illustrated according to an exemplary embodiment of the present invention ensemble coffret (ETI).
As shown in Figure 2, are interfaces as the basis (base) of DMB transmission network as the ETI frame of the output signal of ensemble multiplexing equipment 200.
The hierarchy of ETI is by three layer definition that comprise logic interfacing (LI) layer, network irrelevant (network independent, NI) layer and network-adaptive (NA) layer.
As the essential information of the LI layer of basic logic (primitive logical) structure definition for generation of ensemble.That is, the LI layer is to consist of the interface such as the service flow of the service in the field of audio frequency, video and data offer the user.
The basic interface that comprises the ETI relevant device as the NI layer of the physical interface layer that is used for the LI mapping.That is, the NI layer is that the frame that allows to produce in the LI layer is sent to the interface of the transmitter in the relatively short distance or allows described frame to be sent to the interface of transmitter by the transmission network with relatively low transmission error.
Compare with the NI layer, the NA layer is zero defect (error free) physical interface that uses in the network environment that is prone to mistake (error-prone).The NA layer has the structure that is mapped to the LI layer.That is, thus the NA layer is because the frame that relatively long distance or relatively high transmission error when being prone to mistake in the path of transmitter, allow to produce in the LI layer is sent to the interface of transmitter.
Can be according to the form of the interface signal that will be used, use various interface (for example, ETI (NI, G.703), ETI (NI, V.11), ETI (NA, G.704) etc.).Wherein, (G.703) NI is used as main interface between transmitted signal group's the equipment to ETI.This is the standard input interface of COFDM modulator.
Fig. 3 is the diagram that illustrates with the structure of the corresponding frame of the logic interfacing (LI) of ensemble coffret (ETI) layer.
As shown in Figure 3, mainly be divided into state (STAT) field and logic interfacing data (LIDATA) field with the corresponding frame of LI layer of ETI (below, be called " ETI frame ").The STAT field comprises error state (ERR) field.The LIDATA field comprises: frame feature (FC) field, stream feature (STC) field, head finish (EOH) field, main flow (MST) field, frame end (EOF) field and timestamp (TIST) field.
Fc field comprises: frame count (FCT) field, fast information channel (FIC) sign (below, be called " FICF ") field, flow amount (NST) field, frame phase place (FP) field, pattern (MID) field and frame length (FL) field.
The STC field comprises a plurality of subchannel stream feature (SSTC) fields.Each SSTC field comprises: subchannel sign (SCID) field, start address (SAD) field, level of protection (TPL) field and stream length (STL) field.
The EOH field comprises: multiplexed network signaling channel (MNSC) field and a CRC (CRCh) field.
MST comprises a plurality of fast information channels (FIC) and a plurality of stream.In the case, the FIC of MST and each stream are used for sending service flow from each service encoder.That is, MST is composition data with the major part of the frame of broadcasting.
The EOF field comprises cyclic redundancy check (CRC) (CRC) field and reservation (Rfu) field.
The TIST field consists of the data (below, be called " transmitting time data ") that send the time of corresponding transmission frame about each transmitting apparatus.The TIST field be used for to consist of Single Frequency Network (below, be called " SFN ").Here, consider that transmission frame sends to the definite transmitting time data that will construct of time that each transmitting apparatus experiences from ensemble multiplexing equipment 200 the TIST field.
Fig. 4 is the diagram of DMB (DMB) system of schematically illustrated formation Single Frequency Network (SFN).Single Frequency Network (SFN) refers to from send the network that a plurality of transmitting apparatus was consisted of of identical broadcasting with identical frequency.That is, a plurality of transmitting apparatus correspondingly send to receiving equipment at identical time point with identical transmission frame with identical modulating frequency.
As shown in Figure 4, the ETI frame that is produced by ensemble multiplexing equipment 410 is correspondingly sent to the first transmitting apparatus 421, the second transmitting apparatus 422, the 3rd transmitting apparatus 423 by the first path R1, the second path R2 and Third Road footpath R3.
In the case, transmission frame by the first path R1 from ensemble multiplexing equipment 410 send to the first transmitting apparatus 421 experience time (below, be called " the first time of delay "), by the second path R2 from ensemble multiplexing equipment 410 send to the second transmitting apparatus 422 experience time (below, be called " the second time of delay ") and differ from one another from the time (below, be called " the 3rd time of delay ") that ensemble multiplexing equipment 410 sends to the 3rd transmitting apparatus 423 experience by Third Road footpath R3.Yet, only when the first transmitting apparatus 421, the second transmitting apparatus 422, the 3rd transmitting apparatus 423 send identical transmission frame at identical time point, can provide suitable broadcasting.Therefore, consider the first time of delay, the second time of delay and the 3rd time of delay to determine to send the time point of transmission frame.Be stored in the TIST field of transmission frame about the data of the time point that will send transmission frame determined (below, be called " transmitting time data ").
If the ETI frame is sent out from ensemble multiplexing equipment 410, then each in the transmitting apparatus 421,422 and 423 sending transmission frame with the corresponding time point of the transmitting time data of constructing in the TIST of transmission frame field.Therefore, a plurality of transmitting apparatus can send identical transmission frame at identical time point according to frame transmitting time data.
Simultaneously, in the situation of the service that can not be multiplexed with the individual signals group, ensemble multiplexing equipment 410 produces a plurality of service flow of service, and a plurality of service flow are multiplexed with a plurality of different transmission frames.In the case, if receiving equipment receives a plurality of transmission frames of the service flow that comprises same services at relatively identical time point, the load in the time of then can reducing receiving equipment and receive a plurality of transmission frame.
Below, will being described in the method and apparatus of multiplexed frame in the land DMB system according to an exemplary embodiment of the present invention, it sends two or more transmission frames at identical time point.
Fig. 5 illustrates the according to an exemplary embodiment of the present invention flow chart of the method for multiplexed frame.
As shown in Figure 5, at first, ensemble multiplexing equipment 410 receives a plurality of service flow (S510) of service from network.Then, described a plurality of service flow is correspondingly stored in the buffer.
Subsequently, data service time of 410 pairs of service flow of ensemble multiplexing equipment compare, and search for identical data service time (S530).In the following description, for convenience of explanation, suppose to search have identical service time data and first service stream and the second service that can not be multiplexed with the individual signals group flow.
Subsequently, about having first service stream and the second service stream of identical service time of data, ensemble multiplexing equipment 410 produces an ETI frame that comprises first service stream and comprises the 2nd ETI frame (S540) that second service flows.In the case, ensemble multiplexing equipment 410 can flow at identical time point output first service stream and second service, thereby side by side produces the first transmission frame that comprises first service stream and the second transmission frame that comprises second service stream.
Subsequently, time of delay between in ensemble multiplexing equipment 410 consideration ensemble multiplexing equipments 410 and a plurality of transmitting apparatus 421,422 and 423 each, produce an ETI frame the transmitting time data (below, be called " the first transmitting time data "), and in the TIST field of an ETI frame, construct the first transmitting time data.Subsequently, ensemble multiplexing equipment 410 considers to produce the transmitting time data (below, be called " the second transmitting time data ") of the 2nd ETI frame described time of delay, and in the TIST field of the 2nd ETI frame structure the second transmitting time data.In the case, because an ETI frame and the 2nd ETI frame comprise the service frame with identical service time of data, therefore the first transmitting time data and the second transmitting time data are set to mutually the same (S550).
Transmitting apparatus receives a plurality of ETI frames from the ensemble multiplexing equipment, and is extracted in the transmitting time data of constructing in each the TIST field of a plurality of ETI frames.Subsequently, transmitting apparatus sequentially sends a plurality of transmission frames according to the transmitting time data of transmission frame.In the case, transmitting apparatus sends the first transmission frame and the second transmission frame (S560) with identical transmitting time data at identical time point.
Below, will be described in the frame multiplexing equipment of the transmitting time data that structure is identical in each the TIST field of two or more ETI frames of the different service flow that comprise same services.
The frame multiplexing equipment comprises according to an exemplary embodiment of the present invention: a plurality of buffers, a plurality of service flow that interim storage receives by heterogeneous networks; A plurality of temporal information extractors extract data service time in each service flow from be stored in buffer; A plurality of frame generators, according to service time data timing sequence generating from the ETI frame of at least one service flow of buffer output.In the case, a plurality of frame generator produces the ETI frame independently.
Fig. 6 illustrates the according to an exemplary embodiment of the present invention block diagram of frame multiplexing equipment.In Fig. 6, the frame multiplexing equipment is shown, it comprises: two buffers; Two temporal information extractors extract data service time that are stored in the service flow in the buffer; Two frame generators.
The frame multiplexing equipment comprises according to an exemplary embodiment of the present invention: the first buffer 611, the second buffer 612, very first time information extractor 621, the second temporal information extractor 622, time comparator 630, the first buffer o controller 641, the second buffer o controller 642, the first frame generator 651, the second frame generator 652, timestamp (TIST) generator 660 and global positioning system (GPS) receiver 670.
The first service stream S610 that the 611 interim storages of the first buffer receive by network, the second service stream S620 that the 612 interim storages of the second buffer receive by network.In the case, suppose that first service stream S610 is multiplexed with different ensembles with second service stream S620.
Very first time information extractor 621 output is stored in data service time (below, be called " first service time data ") of the first service stream S610 in the first buffer 611.The output of the second temporal information extractor 622 is stored in data service time (below, be called " second service time data ") of the second service stream S620 in the second buffer 612.In the case, very first time information extractor 621 and the second temporal information extractor 622 extract first service time data and second service time data in the same position of the first buffer 611 and the second buffer 621 respectively.
630 pairs of first service time datas of time comparator and second service time data compare.Time point when in the case, time comparator 630 is correspondingly exported first service stream and second service stream according to the sequential of first service time data and second service time data is definite from buffer.
That is, if the first service time data early than the second service time data, then flows S610 from the second buffer 612 output second service stream S620 early than exporting first services from the first buffer 611.Particularly, time comparator 630 arrange the time that first service stream S610 is temporarily stored in experience in the first buffer 611 (below, be called " the first buffer output delay time ") and second service stream S620 be temporarily stored in experience in the second buffer 612 time (below, be called " the second buffer output delay time "), thus output second service stream S620 is output early than first service stream S610.In the case, the second buffer output delay time is less than the first buffer output delay time, flows and correspondingly exported from buffer subsequently thereby have the first service stream of identical service time of data and second service.For example, according to the first buffer delay output time and the second buffer output delay time, carry out serially from the second buffer output second service stream, and can postpone from the first buffer output first service stream, until receive the second service stream that has identical service time of data with first service stream.
Simultaneously, if the second service time data early than the first service time data, then time comparator 630 arranges, so that the first buffer output delay time is less than the second buffer output delay time.That is, time comparator 630 arranges the first buffer output delay time and the second buffer output delay time, thereby first service stream S610 is output early than second service stream S620.Therefore, having the first service stream of identical service time of data and second service flows and is correspondingly exported from buffer subsequently.
If first service time data and second service time data are mutually the same, then time comparator 630 arranges the first buffer output delay time and the second buffer output delay time, so that the first buffer output delay time is identical with the second buffer output delay time.That is, first service stream S610 is output from the first buffer 611, and second service stream S620 is output from the second buffer 612 simultaneously.
The first buffer o controller 641 is according to the output of the first buffer output delay time control first service stream S610 from the first buffer 611.The second buffer o controller 642 is according to the output of the second buffer output delay time control second service stream S620 from the first buffer 612.In the case, the first buffer o controller 641 and the second buffer o controller 642 are driven independently.The time point that the time point that first service stream S610 is output and second service stream S620 are output can be same to each other or different to each other.
The first frame generator 651 produces an ETI frame that comprises from the first service stream S610 of the first buffer 611 outputs under the control of the first buffer o controller 641, and an ETI frame that will produce outputs to network.The second frame generator 652 produces the 2nd ETI frame that comprises from the second service stream S620 of the second buffer 612 outputs under the control of the second buffer o controller 642, and the 2nd ETI frame that will produce outputs to network.In the case, the first frame generator 651 and the second frame generator 652 are driven independently.
The 660 Application standard times of timestamp (TIST) generator produce the first transmitting time data and the second transmitting time data.The the first transmitting time data that produce in the above described manner are provided for the first frame generator 651, and are configured in the TIST field of an ETI frame.The second transmitting time data are provided for the second frame generator 652, and are configured in the TIST field of the 2nd ETI frame.Here, consider that transmission frame produces first from the time (time of delay) that the ensemble multiplexing equipment is sent to each transmitting apparatus experience and sends data time and the second transmitting time data.
As shown in Figure 6, can obtain the standard time by global positioning system (GPS) receiver 670, gps receiver 670 can obtain information about precise time from least three satellites.In Fig. 6, shown the situation that obtains the standard time with gps receiver.Yet, the invention is not restricted to this.Can be applied to the present invention in any method that can obtain in the standard time scope.
As mentioned above, according to the frame multiplexing equipment, about a plurality of ETI frames of a plurality of service flow of comprising any service, the identical transmitting time data of structure in each TIST field of a plurality of ETI frames.Therefore, the frame transmitting time data that the transmitting apparatus inspection is constructed from the TIST field of the ETI frame of ensemble multiplexing equipment transmission, and send transmission frame.Below, will the transmitting apparatus that can send two or more transmission frames be described.
Fig. 7 illustrates the according to an exemplary embodiment of the present invention diagram of transmitting apparatus.In Fig. 7, the frame synchronization transmitting apparatus that only comprises for two RF transmitters that receive two different transmission frames is shown.Here, term " RF " expression radio frequency.
As shown in Figure 7, the frame synchronization transmitting apparatus comprises: a RF sender unit 711, the 2nd RF sender unit 712 and gps receiver 720.
The one RF sender unit 711 receives different ETI frames separately with the 2nd RF sender unit 712.Then, the TIST field of the ETI frame that each transmitter inspection receives, and the transmitting time of definite transmission frame.
Gps receiver 720 is used for obtaining the standard time of the frame transmitting time data that the TIST field be used to the ETI frame that is identified in reception is configured.
The below will describe the operation of the frame synchronization transmitting apparatus shown in Fig. 7.The one RF transmitter 711 receives an ETI frame that sends from the ensemble multiplexing equipment shown in Fig. 6, and send the first transmission frame according to frame transmitting time data, wherein, identify described frame transmitting time data with the TIST field of the first ETI frame with by the standard time that gps receiver 720 obtains.The 2nd RF transmitter 712 receives the 2nd ETI frame that sends from described ensemble multiplexing equipment, and send the second transmission frame according to frame transmitting time data, wherein, identify described frame transmitting time data with the TIST field of the second ETI frame with by the standard time that gps receiver 720 obtains.
In the case, when structure is identical in the TIST field of the TIST field of an ETI frame and the 2nd ETI frame frame transmitting time data, a RF transmitter 711 sends respectively the first transmission frame and the second transmission frame with the 2nd RF transmitter 712 at identical time point.
Because a RF sender unit 711 and the 2nd RF sender unit 712 are driven independently, so they can send land DMB signal with different modulating frequencies.Although in Fig. 7, do not illustrate, yet can provide a RF sender unit 711 and the 2nd RF sender unit 712 by a RF sender unit (not shown).In the case, this RF sender unit (not shown) can be by such as the sending method of hierarchical modulation, sends the signal with identical TIST field value in the RF signal with same frequency band at identical time point.
As mentioned above, according to embodiments of the invention, can send simultaneously a plurality of ETI frames of a plurality of service flow that comprise any service and need not construct other field, thereby send two or more transmission frames at identical time point.Therefore, receiving equipment can receive at essentially identical time point a plurality of transmission frames of the service flow that comprises same services.Therefore, not needing provides large capacity buffer, and can not spend a large amount of time service is decoded.
Above-described embodiments of the invention not only realize by method and apparatus, also can realize by being used for carrying out with the program of the corresponding function of structure of exemplary embodiment of the present invention or the recording medium that records described program.Those of ordinary skill in the art can recognize these realizations according to the description of above-described exemplary embodiment.
Although described the present invention with reference to current as the exemplary embodiment of using, should be appreciated that, the invention is not restricted to disclosed embodiment, on the contrary, the invention is intended to cover various modifications and equivalent in the spirit and scope that are included in claim.
Claims (13)
1. the equipment of a multiplexed frame, described equipment comprises:
The first buffer, the first service stream that storage sends from the outside;
The second buffer, the second service stream that storage sends from the outside;
The time comparator is to comparing about the first service time data of first service stream and the second service time data that flows about second service;
The first frame generator, output comprise from the first frame of the first service stream of the first buffer output;
The second frame generator, output comprise from the second frame of the second service stream of the second buffer output;
The timestamp generator, the first transmitting time data that generation will be configured in the timestamp field of the first frame and the second transmitting time data that will in the timestamp field of the second frame, be configured,
Wherein, if first service time data and second service time data are mutually the same, then the timestamp generator is produced as identical data with the first transmitting time data with the second transmitting time data,
Wherein, if first service time data and second service time data are mutually the same, then the time comparator carries out the time point of the first buffer output first service stream and the time point of the second buffer output second service stream synchronously.
2. equipment as claimed in claim 1, wherein, the first transmitting time data are used for determining to send the time point of the first frame, and the second transmitting time data are used for determining to send the time point of the second frame.
3. equipment as claimed in claim 1 also comprises:
Global positioning system GPS receiver is from the standard time of at least one satellite reception for generation of the first transmitting time data and the second transmitting time data.
4. equipment as claimed in claim 1 also comprises:
The first buffer o controller is according to the output of the sequencing control first service of first service time data and second service time data stream;
The second buffer o controller is according to the output of described sequencing control second service stream.
5. equipment as claimed in claim 1 also comprises:
Very first time information extractor is from first service stream identification first service time data;
The second temporal information extractor is from second service stream identification second service time data.
6. the method for a multiplexed frame, described method comprises:
The a plurality of service flow that comprise first service stream and second service stream that storage receives from the outside in the first buffer and the second buffer;
Detect each data service time of described a plurality of service flow;
To mutually comparing with described a plurality of service flow corresponding a plurality of service time of data;
Generation comprises the first frame of first service stream;
Generation comprises the second frame of second service stream;
If flow corresponding first service time data and to flow corresponding second service time data identical with being stored in second service in the second buffer with the first service in being stored in the first buffer, then produce the first transmitting time data that will in the timestamp field of the first frame, be configured and the second transmitting time data that will in the timestamp field of the second frame, be configured, as identical data
If first service time data and second service time data are mutually the same, then at identical time point output first service stream and second service stream.
7. method as claimed in claim 6 also comprises:
The time that time that first service stream keeps in the first buffer and second service stream keep in the second buffer is set, thereby flows at identical time point output first service stream and second service.
8. method as claimed in claim 6 also comprises: if first service time data and second service time data are mutually the same, then produce the first frame and the second frame at identical time point.
9. method as claimed in claim 7 also comprises:
Sequential output and the corresponding a plurality of frames of described a plurality of service flow according to described a plurality of service time of data.
10. transmitting apparatus comprises:
The first transmitter receives the first frame from the outside, and sends the first frame according to the first transmitting time data in the timestamp field of the first frame;
The second transmitter receives the second frame from the outside, and sends the second frame according to the second transmitting time data in the timestamp field of the second frame,
Wherein, the first transmitter and the second transmitter are driven independently,
Wherein, if the first transmitting time data and the second transmitting time data are mutually the same, then to send the time point of the first frame identical with the time point that the second transmitter sends the second frame for the first transmitter.
11. transmitting apparatus as claimed in claim 10 also comprises:
Gps receiver is from the standard time of at least one satellite reception for identification the first transmitting time data and the second transmitting time data.
12. transmitting apparatus as claimed in claim 10, wherein, the first transmitter and the second transmitter are with different modulating frequency transmitted signals.
13. transmitting apparatus as claimed in claim 10, wherein, the first transmitter and the second transmitter by such as the sending method of hierarchical modulating method with identical modulating frequency transmitted signal.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20070060329 | 2007-06-20 | ||
| KR10-2007-0060329 | 2007-06-20 | ||
| KR10-2007-0108780 | 2007-10-29 | ||
| KR1020070108780A KR101382613B1 (en) | 2007-06-20 | 2007-10-29 | Method of multiplexing transmission frame, apparatus of multiplexing transmission frame and transmission apparatus for digital broadcasting signal |
| PCT/KR2008/003499 WO2008156326A2 (en) | 2007-06-20 | 2008-06-19 | Method of multiplexing transmission frame of digital broadcasting signal, apparatus for multiplexing transmission frame, and transmitting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101715637A CN101715637A (en) | 2010-05-26 |
| CN101715637B true CN101715637B (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800213049A Expired - Fee Related CN101715637B (en) | 2007-06-20 | 2008-06-19 | Method of multiplexing transmission frame of digital broadcasting signal, apparatus for multiplexing transmission frame, and transmitting apparatus |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2160861A4 (en) |
| KR (1) | KR101382613B1 (en) |
| CN (1) | CN101715637B (en) |
| WO (1) | WO2008156326A2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102215499B (en) * | 2010-04-01 | 2013-08-14 | 鼎桥通信技术有限公司 | Method for determining occurrence time of measurement event |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060122784A (en) * | 2005-05-26 | 2006-11-30 | 한국전자통신연구원 | Method and apparatus for synchronizing data service with video service in digital multimedia broadcasting |
| KR20070010363A (en) * | 2005-07-18 | 2007-01-24 | 주식회사 쏠리테크 | Apparatus and method for terrestrial digital multimedia broadcasting using satellite data path, and framing method for the same |
| CN1960240A (en) * | 2006-09-15 | 2007-05-09 | 中兴通讯股份有限公司 | Emission method of mobile multimedia broadcast |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100233937B1 (en) * | 1996-10-17 | 1999-12-15 | 이계철 | Video and audio synchronization method using timestamp compensation and mpeg-2 encoder |
| SE0201008D0 (en) * | 2002-04-03 | 2002-04-03 | Teracom Ab | A method and a system for synchronizing digital data streams |
| KR100646851B1 (en) * | 2004-11-03 | 2006-11-23 | 한국전자통신연구원 | Terrestrial DMB broadcasting tranceiving System for synchronizing data service with audio/video service |
-
2007
- 2007-10-29 KR KR1020070108780A patent/KR101382613B1/en not_active IP Right Cessation
-
2008
- 2008-06-19 EP EP08766459.5A patent/EP2160861A4/en not_active Withdrawn
- 2008-06-19 WO PCT/KR2008/003499 patent/WO2008156326A2/en active Application Filing
- 2008-06-19 CN CN2008800213049A patent/CN101715637B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060122784A (en) * | 2005-05-26 | 2006-11-30 | 한국전자통신연구원 | Method and apparatus for synchronizing data service with video service in digital multimedia broadcasting |
| KR20070010363A (en) * | 2005-07-18 | 2007-01-24 | 주식회사 쏠리테크 | Apparatus and method for terrestrial digital multimedia broadcasting using satellite data path, and framing method for the same |
| CN1960240A (en) * | 2006-09-15 | 2007-05-09 | 中兴通讯股份有限公司 | Emission method of mobile multimedia broadcast |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008156326A2 (en) | 2008-12-24 |
| KR101382613B1 (en) | 2014-04-07 |
| CN101715637A (en) | 2010-05-26 |
| WO2008156326A3 (en) | 2009-02-26 |
| EP2160861A4 (en) | 2013-05-01 |
| KR20080112072A (en) | 2008-12-24 |
| EP2160861A2 (en) | 2010-03-10 |
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