CN106034260B

CN106034260B - Support the signaling and mechanism of Delamination Transmission

Info

Publication number: CN106034260B
Application number: CN201510117181.0A
Authority: CN
Inventors: 徐异凌; 张文军; 史毅俊; 孙军; 何大治; 管云峰; 柳宁
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 2015-03-17
Filing date: 2015-03-17
Publication date: 2019-08-09
Anticipated expiration: 2035-03-17
Also published as: CN106034260A

Abstract

The present invention provides a kind of signaling and mechanism for supporting Delamination Transmission, the signaling includes at least following information: dependency information provides the dependence between the content for belonging to a group；Access information provides mapping relations of the content of different layers between system from top to bottom every layer.The present invention, such as the system of LDM technology, can pass through the new signaling of definition for multilayer multiplexing is supported, provide the dependence between different layers, and the mapping relations in protocol stack from top to bottom, it enables a user to effectively access, service needed for finding user.

Description

Support the signaling and mechanism of Delamination Transmission

Technical field

The present invention relates to multimedia delivery network technologies, and in particular, to multimedia layering in a kind of fusion of future network Transmission mechanism and signaling information etc..

Background technique

In multimedia delivery network system, there are a variety of different physical layer transmission technologies, such as broadcast transmission ATSC3.0, NGB-W, DVB-T2/NGH, two-way communication technology such as broadband, mobile communication etc..Equally, upper layer also have it is various not Same transport layer protocol emerges in large numbers, such as MMT (MPEG Media Transport, ISO/IEC 23008-1), FLUTE, RTP etc. Deng.It applies when by these different upper layer transport protocols in these different physical layer transmission technologies, how to provide per each and every one (program) is serviced from upper layer to lower layer, then structure and mapping relations at all levels, user/terminal is enabled smoothly to find institute The service of need and smoothly access are an important topics.

In existing digital television broadcasting, the Various types of data including audio-video is all by transport stream (Transport Stream, TS) format be packaged with transmission.By packaging multiplexing with regard to directly being transmitted, hierarchical relationship is simple for service It is single to be illustrated, it, can be by first accessing these information datas, to obtain when user accesses by relevant Program Service Information data Know there is which service, what access information is, thus effective access.

With the development of technological evolvement and application, the data encapsulation of (IP-centric) is obtained with transmission centered on IP It is more and more widely used, is the necessary component of the multi-media transmission systems such as generation digital television broadcasting.Fig. 1 is one Application case.One complete multi-media transmission system, upper layer, which has, is packaged various different service content by encapsulation from level to level It is transmitted by IP, is sent to the end by physical layer.In this process, each layer has different packaging methods, layer Mutually indepedent between layer, which signal ability which an initial data receive in each layer of which packet finally by Required service is received and be accessed, is our problems to be solved.

In particular, a media content can be in PLP (Physical Layer in different physical layer pipes Pipe it is transmitted on).For example, due to the introducing of LDM (Layered Division Multiplexing) technology, different signals It can be sent by layering, for example, top layer is the best audio content of robustness, next layer is video content；For another example, most upper The star turn that layer is, lower layer is some attached programs relevant to main program；Upper layer be for moving received HDTV, under Layer is the UHDTV of high-speed transfer.LDM technical requirements first decode upper layer data, and it is removed from reception signal, could obtain Lower data.

Summary of the invention

For the defects in the prior art, the object of the present invention is to provide a kind of signaling and mechanism for supporting Delamination Transmission, To support effective access of user, service needed for finding user.

According to an aspect of the present invention, a kind of signaling for supporting Delamination Transmission is provided, the signaling includes at least following Information:

Dependency information provides the dependence between the content for belonging to a group；

Access information provides mapping relations of the content of different layers between system from top to bottom every layer.

Preferably, the dependency information signaling provides the dependence between the content for belonging to a group, definition It is as follows:

Dependent_group_id-has a group of dependence, belongs to service/section of a dependence group Mesh/content component has different degrees of dependence between them；

Dependent_group_type-definition group type, for example, be ' 0000 ' due to LDM technology application and generate Dependence group, ' 0001 ' be due to SVC technology application and generate dependence group, and in the future due to other Technology application and generate dependence group；

Dependent_layer_id-is for defining description object (service, program, content component, certain section of domain (such as MMTP/ ROUTE session), some IP flow (IP flow)) degree of dependence relationship: 0, expression be it is top, do not depend on other layer； N indicates the data dependent on n-1 layers, and only after n-1 layers of data are obtained by decoding, it could be obtained by decoding.

Preferably, the access information provides mapping relations of the content of different layers between system from top to bottom every layer, So as to correctly find and access, i.e., (service, program, content component, certain section of domain is (such as the description object in dependence group MMTP/ROUTE session), some IP stream (IP flow)) it is transmitted on any (several) a PLP (PLP_id).In particular, if One content-data is on several PLP and transmits, such as by taking LDM as an example, then needing in signaling includes LDM_ that they belong to GROUP_ID, PLP_NUM and corresponding PLP_id.

The present invention provides a kind of mechanism of support Delamination Transmission using above-mentioned signaling:

Degree of dependence relationship and access information these new informations can be with unified definitions, in some position, for example definition is new 2 signaling of layer are transmitted.

Different position transmission, such as 2 signaling of layer, MP can also be added to by the different content of information, as needed Table or even physical layer or top signaling, for describing the service, program, content component, certain section of domain (such as MMTP/ROUTE Session), some IP, which flows, relies on group and degree of dependence relationship and access information belonging to (IP flow).

Compared with prior art, the present invention have it is following the utility model has the advantages that

Using technical solution of the present invention, it can support that, using multilayer technique multiplexing technology, such as LDM's, SVC etc. is System, by the signaling newly defined, gives the dependence between different layer datas, enables a user to effectively access, look for Service needed for user.

Detailed description of the invention

Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention, Objects and advantages will become more apparent upon:

Fig. 1 is medium transmission system case schematic diagram；

Fig. 2 is the transmission position case schematic diagram of new signaling information.

Specific embodiment

The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention Protection scope.

Chinese invention patent application: a kind of mapping of IP-based multimedia programming and access signaling and method (CN20141038291.7) signaling and mechanism of some relevant access are given, these signaling informations can not only pass through layer 2 Signaling transmission also can according to need and be added to the signaling of different location and be transmitted.Such as by the mapping of media content and PLP Information is transmitted in MP table, or is defined specific message m essage and transmitted with MMTP；It is transmitted in 2 signaling of layer or 1 signaling of layer.

In order to support the technology of LDM etc, need to define new signaling, be depicted transmitted by LDM different layers it is various Dependence between data, so which layer data knows should first solve in varied situations, which layer data this takes；And it provides every One layer data is mapped to the specific mapping relations of PLP, gets required layer data from which (several) a PLPs to know.

1, dependence

Dependent_Group descriptor is defined, for describing different services, MMTP/ROUTE session, IP Dependence between flow (IP stream).This descriptor can be transmitted in different location, such as 2 signaling of layer, MP table, very To physical layer or top signaling, for describing the service, program, content component, certain section of domain (such as MMTP/ROUTE Session), some IP, which flows, relies on group and degree of dependence relationship belonging to (IP flow).

Syntax	Value	No.of bits	Mnemonic
				Dependent_Group descriptor{
descriptor_tag		16	uimsbf
				descriptor_length	16	uimsbf
Dependent_group_id		8	uimsbf
				Dependent_group_type	4	uimsbf
Dependent_layer_id		4	uimsbf
				}

Dependent_group_id-has a group of dependence.Belong to service/section of a dependence group Mesh/content component has different degrees of dependence between them.

Dependent_group_type-definition group type, for example, be ' 0000 ' due to LDM technology application and generate Dependence group, ' 0001 ' be due to SVC technology application and generate dependence group, and in the future due to other Technology application and generate dependence group.

Value	Realm type
		0000	LDM
0001	SVC
		Other	Retain

Dependent_layer_id-is for defining description object (service, program, content component, certain section of domain (such as MMTP/ ROUTE session), some IP flow (IP flow)) degree of dependence relationship:

0, expression be it is top, do not depend on other layer；

N indicates the data dependent on n-1 layers, and only after n-1 layers of data are obtained by decoding, it could be obtained by decoding ?.

2, access information

The data of different layers that composition relies on group can come from different places, in addition to knowing their degree of dependence relationship, Also need to know their access information, the especially address mapping relation between transport protocol different levels, so as to Correctly finds and access.For this purpose, mark/address mapping table between different agreement layers can be provided them.

As physical layer pipe PLP (Physical layer Pipe) in application, needing to know the description object relied in group (service, program, content component, certain section of domain (such as MMTP/ROUTE session), some IP flow (IP flow)) is in which PLP (PLP_id) it is transmitted on.

In particular, a description object can be divided in several PLP and pass, then, these PLPs needs are instructed to.With For LDM:

3. the transmission position of new signaling information

These new informations can be with unified definition, in some position, for example defines new 2 signaling of layer to transmit.It can also incite somebody to action The different content of information is added to different position transmission, such as 2 signaling of layer, MP table or even physical layer as needed, or Top signaling, for describing the service, program, content component, certain section of domain (such as MMTP/ROUTE session), some IP stream Group and degree of dependence relationship and access information are relied on belonging to (IP flow).As shown in Figure 2.

Application example:

Content is multiplexed by one program by LDM technology, and upper layer is for moving received HDTV, and lower layer is that high speed passes Defeated UHDTV.

So by methods herein, the upper and lower content of this program belongs to a dependent_group_ Id, dependent_group_type LDM have different dependent_id respectively, and HDTV content at the middle and upper levels is 0, The UHDTV content of lower layer is that 1. the two contents can be respectively by transmitting on different PLP, such as PLP_1 and PLP_2.

According to these signaling informations, receiving end can selectively be received.For mobile subscriber, it can be only from PLP_1 The upper content viewing for receiving HDTV；For fixed user, it can receive the content of PLP_1 and PLP_2 simultaneously.

Technical solution of the present invention, such as the system of LDM technology, can pass through the new letter of definition for multilayer multiplexing is supported It enables, provides the dependence between different layers, and the mapping relations in protocol stack from top to bottom, enable a user to Effectively access, service needed for finding user.

Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow Ring substantive content of the invention.

Claims

1. a kind of transmission method for the signaling for supporting Delamination Transmission, it is characterised in that:

Degree of dependence relationship and access information these new information unified definitions are transmitted in some position；

Or by the different content of information, as needed, it is added to different position transmission, the different location is the letter of layer 2 It enables, MP table, physical layer or top signaling, for describing belonging to service, program, content component, certain section of domain or some IP flow Rely on group and degree of dependence relationship and access information；

The signaling includes at least following information:

Access information provides mapping relations of the content of different layers between system from top to bottom every layer；The dependence letter Signaling is ceased, the dependence between the content for belonging to a group is provided:

√ Dependent_group_id-has a group of dependence, belongs to service or the section of a dependence group Mesh or content component have different degrees of dependence between them；

√ Dependent_group_type-definition group type, ' 0000 ' due to LDM technology application and generate dependence close The group of system, ' 0001 ' is the group of the dependence of the application due to SVC technology and generation, and answering due to other technology in the future With and generate dependence group；

√ Dependent_layer_id-is used to define the degree of dependence relationship of description object: 0, expression be it is top, do not depend on Other layer；N indicates the data dependent on n-1 layers, and only after n-1 layers of data are obtained by decoding, it could be obtained by decoding ?；

The access information provides mapping relations of the content of different layers between system from top to bottom every layer, so as to correct Find and access, i.e., the description object in dependence group transmits on which or which PLP (PLP_id)；In particular, if One content-data is on several PLP and transmits, then needing in signaling includes LDM_GROUP_ID, PLP_ that they belong to NUM and corresponding PLP_id.