WO2013055162A2 - Method for transmitting media data via a heterogeneous ip network independently of a media codec - Google Patents

Method for transmitting media data via a heterogeneous ip network independently of a media codec Download PDF

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Publication number
WO2013055162A2
WO2013055162A2 PCT/KR2012/008337 KR2012008337W WO2013055162A2 WO 2013055162 A2 WO2013055162 A2 WO 2013055162A2 KR 2012008337 W KR2012008337 W KR 2012008337W WO 2013055162 A2 WO2013055162 A2 WO 2013055162A2
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Prior art keywords
media
mmt
data
unit
encoded
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PCT/KR2012/008337
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French (fr)
Korean (ko)
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WO2013055162A3 (en
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배성준
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한국전자통신연구원
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Priority to KR20110104853 priority Critical
Priority to KR10-2011-0104853 priority
Priority to KR10-2012-0112544 priority
Priority to KR1020120112544A priority patent/KR20130040132A/en
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority claimed from US14/351,776 external-priority patent/US20140282799A1/en
Publication of WO2013055162A2 publication Critical patent/WO2013055162A2/en
Publication of WO2013055162A3 publication Critical patent/WO2013055162A3/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2381Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236Assembling 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
    • H04N21/23605Creation or processing of packetized elementary streams [PES]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61Network physical structure; Signal processing
    • H04N21/6106Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643Communication protocols
    • H04N21/64322IP

Abstract

The present invention relates to a method for transmitting media data via a heterogeneous IP network, the method efficiently transmitting, independently of a specific media codec, media streaming in the format of a coded media fragment data unit, including a header of a media unit having a minimized size and a simplified structure.

Description

Independent media data transmission method in a heterogeneous IP network through media codecs

The present invention relates to relates to a media data transmission method, and more particularly to a method of transmitting the media data encoded in the system for transmitting the media data encoded by a heterogeneous IP network (heterogeneous IP network).

MPEG-2 system was standardized packetization, synchronization and multiplexing functions such as standard MPEG-2 TS (Transport Stream) technology for the need to transfer the AV (Audio Video) content from broadcast network has written widely. However, the network is an MPEG-2 TS is inefficient in All IP (Internet Protocol) qualified new environment.

In this new environment, new media transmission media transmission technology in a system for transmitting through the two kinds of IP networks (heterogeneous IP network) the media data encoded in consideration of the media transmission environment expected in the future is required.

The encoded media data (Media Data) a heterogeneous IP network (heterogeneous IP network) in the system for transmitting through the portion of the media unit, not part of the system to process the media encoder has access (access) and processing (processing) ( in media unit) is difficult to implement if the machine has a complex structure, a header of the media unit, there is a problem in lowering the availability.

An object of the present invention to provide a method of transmitting media data via a heterogeneous IP network for transmitting a media stream efficiently so as not to depend on the specific media codec (streaming).

The present invention relates to a, the media data transmission method of encoding in a system for transmitting the encoded media division data (coded media fragment data) through a heterogeneous IP network (heterogeneous IP network) for transmitting the encoded media data, media codecs receiving service; (MU media unit) unit having a media independent format to a specific media codec from the layer; Generating a MMT Asset (Asset MMT) to encapsulate said generated media unit; Generating MMT package (Package MMT) to encapsulate said generated MMT assets; Generating a payload format MMT (MMT Payload format) MMT receives a package the generated; And the generated MMT receives a payload format comprising: generating a MMT transport packet (MMT Transport Packet), the media unit includes a header and data, the data portion is encoded media division data (coded media fragment data) to and wherein the header portion of the encoded media division data indicator, the encoded media division data indicating whether including the start point (random access point) capable of random access to the encoded media data (coded media data ) of the media provides a data transmission method of encoding, comprising an indicator indicating the start of the indicator and the coded media division data indicating including comprises the last portion of the encoded media data.

In addition, the header portion may further include an indicator imprinted if the encoded media data is divided require lossless transmission.

Also, the media unit having an independent format for the particular media codec from the media codec layer; receiving service (Media Unit MU), the media processing unit having an independent format for the particular media codec from the media codec layer (Media Processing Unit ; receiving an offer MPU), and; Generating a MMT Asset (Asset MMT) to encapsulate said generated media unit, to encapsulate said generated media processing unit may be a step of generating a MMT Asset (Asset MMT).

In addition, the media processing unit having an independent format for the particular media codec from the media codec layer; receiving service (Media Processing Unit MPU), the media fragments units having an independent format for the particular media codec from the media codec layer (Media fragment unit; encapsulation steps and the media fragment unit receiving the MFU) the media processing unit (media processing unit; may be a step of generating an MPU).

In addition, the header portion the encoded media division data indicator, the encoded media division data indicating whether including the start point (random access point) capable of random access to the access unit; the beginning of the (Access Unit AU) It may include an indicator indicating whether or include the end of the; (AU access unit) includes indicator and said coded media division data showing whether or not the access unit.

The present invention relates to a media unit for MMT (MPEG Media Transport) For a system, as a part of the system to process the media encoder has access (access) and treatment (processing), the media with a minimum of information that can be provided by the media encoder minimize the size of the media unit header that carries information which can be obtained from the media encoding process by forming a header of a unit and it is possible to simplify the structure of the media unit header.

Further, the present invention may be configured as a media unit header that may assist the transport (transport) and consumption (consume) the media "generic" information, to simplify the implementation of the media unit.

In addition, the present invention, by the configuration information to exclude dependent information media unit header to a specific media codec and media encoder is sent to the system, regardless of coding a specific media codec media data (Media Data) two kinds of IP network ( the heterogeneous IP network) is more efficient system for transmitting through a allows streaming media (streaming).

1 is a schematic diagram showing the hierarchy of MMT.

2 is a conceptual diagram showing a format of information units (or data or a packet) used for each layer of the MMT hierarchy.

Figure 3 is a schematic diagram of the MMT package configuration.

Figure 4 is a table showing a media fragment unit (MFU) in accordance with one embodiment of the present invention.

5 is a table showing a media fragment unit (MFU) header in accordance with one embodiment of the present invention.

Figure 6 is a flow chart illustrating a method of transmitting a media division data encoding in accordance with one embodiment of the present invention.

7 is a flow chart illustrating a method of transmitting a media division data encoding in accordance with another embodiment of the present invention.

Figure 8 is a flow chart illustrating a method of transmitting a media division data encoding in accordance with another embodiment of the present invention.

The invention will be described in bars, illustrated in the drawings certain embodiments that may have a variety of embodiments can be applied to various changes and detail.

This, however, is by no means to restrict the invention to the specific embodiments, it is to be understood as embracing all included in the spirit and scope of the present invention changes, equivalents and substitutes.

First, the term of the second, etc., can be used in describing various elements, but the above elements shall not be restricted to the above terms. These terms are only used to distinguish one element from the other. For example, without departing from the scope of the present invention, the first component may be referred to as a second configuration can be named as an element, similar to the first component is also a second component. And / or the term includes any item of the items described concerning the combination or plurality of the plurality of related items disclosed.

It understood that when one element is described as being "connected" or "coupled" to another element, but may be directly connected or coupled to the other components, may be other element in between It should be. In contrast, when an element is referred to there being "directly connected" to another element or "directly connected", it should be understood that other components in the middle that does not exist.

The terms used in the present specification are merely used to describe particular embodiments, and are not intended to limit the present invention. Expression in the singular number include a plural forms unless the context clearly indicates otherwise. In this application, the terms "inclusive" or "gajida" terms, such as is that which you want to specify that the features, numbers, steps, actions, components, parts, or one that exists combinations thereof described in the specification, the one or more other features , numbers, steps, actions, components, parts, or the presence or possibility of combinations thereof and are not intended to preclude.

Unless otherwise defined, including technical and scientific terms, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Such terms as those defined in a generally used dictionary are to be interpreted as having the same meaning in the context of the relevant art, unless expressly defined in this application, be interpreted to have an idealistic or excessively formalistic meaning no.

Hereinafter, the meaning of the terms are defined as follows.

The encoded media data (Media Data) system for transmitting through a heterogeneous IP network (heterogeneous IP network) is referred to as MMT (MPEG Media Transport) system.

Content components (content component) or media component (media component) is defined as a single type of media (media of a single type) or a subset of one type of media (subset of the media of a single type), e.g. It can be a video track (video track), and movie (movie subtitles), or video enhancement layer (enhancement layer of video).

Content (content) and is defined by a set of content components, for example, may be a film (movie), singing (song).

Expression (presentation) is defined by the user and behavior (operation) to be performed by one of the content components or one one of the services to experience (e.g. movies) or one or more devices.

Service (service) is defined as one or more content components transmitted to the expression (presentation) or storage (storage).

Service information (service information) is defined as a meta-data describing a service, it attributes (characteristics) and the component of the service.

Access unit (Access Unit; AU) is the smallest data object may have the time information as an attribute.

If the media data is encoding time information for decoding and presentation is not assigned an associated, AU is not defined.

MMT Asset (Asset MMT) is a logical data object consisting of a particular data chunk with the format defined by the configuration of at least one of the MPU with the same MMT asset ID, or other criteria. MMT asset is the largest data unit, the same composition information and transmission characteristics is applied.

MMT asset transmission characteristics (MMT Asset Delivery Characteristics; MMT-ADC) is a description related to the QoS requirements for transmitting MMT asset. MMT-ADC is represented not know the specific transport environment.

MMT composition information (MMT Composition Information; MMT CI) describes the spatial and temporal relationships between the MMT asset.

Media fragment unit; is a generic container (Media Fragment Unit MFU), and to any specific codec independently, it receives the media data encoded that can be consumed independently by the media decoder. Which receives the information that can be used at the transport layer have a size equal to or smaller than the access unit (AU).

MMT package (Package MMT) is a collection of logically structured data, composed of at least one MMT asset, MMT- composition information, MMT- asset transmission properties and descriptive information.

MMT packet (packet MMT) is a format of data which is generated or consumed by the MMT protocol.

MMT payload format (MMT payload format) is a format for MMT package, or payload of the MMT signaling message to be transmitted by the MMT protocol or internet application layer protocol (e.g., RTP).

The media processing unit (Media Processing Unit; MPU) is in a separate container general to any specific media codec, receives information relating to at least one of the AU and the additional transmission and consumption. Non-order temporal data, MPU receives a portion of the range that does not belong to the AU data. MPU is the encoded media data, which may be a complete and processed independently. In this context, the processing means encapsulation or packetized into MMT package for transmission.

Non-time data (Non-timed data) defines all data elements to be consumed without specifying a time. Non-time data may have a time range in which data can be executed or initiated.

Time data (timed data) defines a data element associated with the particular time at which decoding and presentation.

Media Data (Media data) is a non-means data elements, including both time data (non-timed data) and time data (timed-data).

Media unit (Media Unit) means a container (container) containing the media fragment unit (MFU), or media processing unit (MPU).

With reference to the accompanying drawings, it will be described in detail preferred embodiments of the invention. In order to facilitate a thorough understanding in the following description of the present invention the same reference numerals for the same components of the drawing and description duplicate with respect to the same elements will be omitted.

1 is a schematic diagram showing the hierarchy of MMT.

Referring to Figure 1, the MMT layer comprises an encapsulation layer (Encapsulation layer), the transport layer (layer Delivery) and the S-layer (S layer). MMT layer operates above the transport layer (Transport layer).

Encapsulation layer (Encapsulation layer; E-layer) may for example in charge of packetizing (packetization), pragma functions such as remote presentation (Fragmentation), synchronization (Synchronization), multiplexed (Multiplexing) for media transfer.

Encapsulation region (encapsulation functional area) defines the logical structure of the format of data units to be processed by the objects that conform to media content, MMT package, and MMT. MMT package to provide the necessary information to the adaptive transmission specifies the relationship between the components and they, including the media content. Format of the data unit is to be stored or transmitted as the payload of a transport protocol, and is defined to encapsulate the media encoded for easy conversion between them.

Encapsulation layer (E-layer), as shown in FIG. 1, MMT E.1 layer (MMT E.1 Layer), MMT E.2 layer (MMT E.2 Layer) and MMT E.3 layer (MMT It can be configured in E.3 Layer).

E.3 layer media fragment unit provided from a media codec (A) layer; encapsulate (Media Fragment Unit MFU) media processing unit; generates (Media Processing Unit MPU).

The media data encoding from a higher layer is encapsulated with a MFU. Type and the value of the encoded media may be abstracted so that it can be used in generally the MFU a particular codec technology. This makes it possible to process the MFU without access to the encoded media is encapsulated lower layer. The lower layer is to recall the encoded media data required from the buffer of a network or a storage medium and transmits it to the decoder. MFU has sufficient information pieces of media unit for performing the operation.

MFU may have an independent, format to any particular codec (codec), which can sit for a data unit that can be consumed independently of the media decoder. MFU may for example be a pikchwo (picture) or slice (slice) of a video.

One that can be transmitted and decoded independently, or a group of a plurality of MFU generates MPU. Independently transmittable and viable non-temporal media also generates MPU. MPU will be described an internal structure such as the arrangement and pattern of the MFU to enable fast access to the MFU and partially consumed.

E.2 layer encapsulates the MPU generated in E.3 layer generates MMT Asset (Asset MMT).

MMT asset is one, or data entities (data entity) made of a plurality of MPU from a single data source, composition information (Composition Information; CI) and the transfer characteristic; and (Transport Characteristics TC) data units defined, MMT, pay are multiplexed by the load format, it is sent by the MMT protocol. MMT asset may be corresponding to the PES (packetized elementary streams), for example, video, audio, program information (program information), MPEG-U widget (widget), JPEG images, MPEG 4 file format (File Format), M2TS It may correspond to a (MPEG transport stream).

E.1 generates a layer (Layer E.1) is encapsulated by the MMT assets generated by the MMT E.2 layer package (Package MMT).

MMT assets other functional areas - and with the same user or MMT composition information (MMT-composition information; MMT-CI) for the response of the subsequent experience of a separate-transmission region and a signal region and is packaged. The MMT package is further packaged with the transmission characteristics of selecting a suitable transmission method for each of the MMT assets so as to meet the Quality of Experience of MMT asset.

MMT package may be composed of one or a plurality of MMT assets with additional information, such as the composition information (composition information) and transmission characteristics (transport characteristics). Composition information (composition information) includes information on the relationship (relationship) between the MMT asset, a content (content) is for showing the relationship (relationship) between a plurality of MMT package case made of a plurality of MMT package more information can be included. Transmission properties (transport characteristics) may comprise a transmission characteristic information required to determine the transmission condition (delivery condition) of MMT asset or MMT packet, for example, traffic description parameters (traffic description parameter) and QoS descriptor (QoS descriptor ) may include. MMT package may correspond to the MPEG-2 TS program (Program).

Transport Layer (Delivery layer) may for example perform a network flow multiplexing (Network flow multiplexing) of the media that is sent over the network, packetized network (Network packetization), QoS control etc.

Forwarding area (delivery functional area) defines an application layer protocol and the format of the payload. The application layer protocol from the invention provides enhanced features for the delivery of MMT package compared with the conventional application layer protocol for the transmission of the multimedia including a multiplexer. Payload formats are defined to pass, regardless of the media type or an encoding method, and encoding the media data.

The transport layer (layer-D), as illustrated in FIG. 1, MMT D.1 layer (MMT D.1 Layer), MMT D.2 layer (MMT D.2 Layer) and MMT D.3 layer (MMT It can be configured to D.3 Layer).

D.1 layer (D.1-layer) is customize the package generated by the MMT E.1 layer generates MMT payload format (MMT Payload format). MMT payload format is a format for transmitting the payload and the MMT assets, and transmit information for consumption by the other conventional applications, such as the MMT Application Protocol Transfer Protocol or RTP. MMT payload may comprise a fragment of the MFU with information, such as AL-FEC.

D.2 layer (D.2-layer) are subjected to payload formatting MMT generated in D.1 layer generates MMT transport packet (Transport Packet MMT) or MMT packet (Packet MMT). MMT MMT transport packet or the packet is a data format used in the application transport protocol for MMT.

D.3 layer (D.3-layer) provides the ability to exchange information between the layer by the cross-layer design (cross-layer Design) to support QoS. For example, D.3 layer may perform QoS control by using the QoS parameters of the MAC / PHY layer.

S-layer (S layer) performs a signaling function (signaling function). For example, a signaling function for a session initialization of the media to be transmitted / control / management (session initialization / control / management), server-based and / or client-based trick modes, service discovery (Service discovery), synchronization (Synchronization) including It can be carried out.

Signaling functional areas (functional area signaling) defines the format of messages for managing the delivery and consumption of MMT package. Message for the consumer management is used to transport the structure of the MMT package, messages, for management transfer is used to transfer the configuration of the structure and protocol of the payload format.

S-layer (S layer), can be composed of a, MMT S.1 layer (Layer MMT S.1) and MMT S.2 layer (MMT S.2 Layer) As shown in Figure 1.

S.1 layer service discovery (Service discovery), session initiation / termination (media session initialization / termination), session, expression / control (media presentation session / control), transmission (D) layer, and encapsulation of the media in the media (E) It may perform functions such as interface between the layers. S.1 layer may define the format of the control message between the application for media session management expression (presentation session management).

Passing on S.2 layer flow control (flow control), delivery session management (delivery session management), delivery session monitoring (delivery session monitoring), error control (error control), the hybrid network synchronization control (Hybrid network synchronization control) transmission end of the layer (D-layer) - may define the format of a control message exchanged between the point (end-delivery points).

S.2 layer synchronization under delivery session on and off in order to support the operation of the transport layer (delivery session establishment and release), delivery session monitoring, flow control, error control, and resource reservation for a set delivery session, composite delivery environment for signaling, the adaptive transmission may include a signaling for the (adaptive delivery). It can provide the necessary signaling between the transmitting side (sender) and a receiving side (receiver). That is, S.2 layer may provide the signaling required between the transmission side (sender) and a receiving side (receiver) in order to support the operation of the transport layer as described above. Also, S.2 layer may be in charge of an interface function between the transmission layer and the encapsulation layer.

Figure 2 illustrates the format of units of information (or data or a packet) used for each layer of the MMT-layer structure of Figure 1;

Media fragment unit (Media Fragment Unit; MFU) (130) may be formed of the encoded media division data (coded media data fragment, 132) and MFUH (Media Fragment Header Unit) (134). Media fragment unit 130 may have an independent format into the generic container (container general format) to a specific codec (codec) sit the smallest data unit that can be independently consumption in the media decoder. MFUH (134) the media characteristics may include additional information, such as for example loss of acceptable limits (loss-tolerance). MFU) (130) may for example be a pikchwo (picture) or slice (slice) of a video.

Media fragment unit (Media Fragment Unit; MFU) may define the format of encapsulating the portion of the AU at the transport layer in order to perform adaptive transmission in the range of MFU. MFU may be used to transmit some form of an encoded media so that the portion of the AU to be decoded or disposed independently.

MFU has an identifier to distinguish one from the other MFU MFU, may have a general relationship information between MFU within a single AU. The dependency between the MFU in a single AU and described, the associated priority of the MFU can be described as part of such information. The information may be used to deal with transmission in the sub-transport layer. For example, the transport layer can be omitted, the transmission of which may be disposed of, so as to support the QoS transmission in a sufficient bandwidth MFU. Detailed Description of the MFU structure will be described later.

MPU is a collection of media fragments unit comprising a plurality of media fragments unit 130. MPU may independently include a common container can have the format (general container format) and access unit (Access Unit) and an equivalent of the media data in a particular codec (codec). MPU is time data units (timed data unit) or a non-data units may have the time (non-timed data unit).

MPU are independently and fully handled by the data object following the MMT, the process may include encapsulated and packetized. MPU may be comprised of at least one MFU have a portion of the data having the format defined by the standard.

A single central processing unit (MPU) at least one AU integer (integral number), or the ratio of the - can receive the time data. To the time data, AU, but it can be transmitted from the at least one MFU, one AU can not be divided into a number of MPU. In the time data, a central processing unit (MPU) of non-independent and completely processed by the object conforming to MMT - - Non receives a portion of the time data.

MPU can be uniquely identified within the MMT package associated with asset ID to the sequence number and separates them with other MPU

MPU may have at least a random access point. The first byte of the payload MPU can always start with a random access point. In the time data, the fact that the decoding order of the first MFU from MPU payload always means that 0 In the time data, the presentation period and the decoding order of the AU can be sent to indicate the presentation time. MPU does not have its own initial presentation time, the first AU presentation time of one MPU may be described in the composition information. Composition information may be stated for the first time, the presentation of the MPU. Details will be described later.

MMT asset 150 is a set of MPU comprised of a plurality of MPU. MMT asset 150 is a plurality of MPU from a single data source, - a data entity consisting of (time (timed) or non-time (non-timed) data), MMT asset information 152 asset packaging metadata (Asset It includes additional information, such as the packaging metadata), and data type. MMT assets 150, for example, video, audio, program information (program information), MPEG-U widget (widget), JPEG images, MPEG 4 FF (File Format), PES (packetized elementary streams), M2TS (MPEG transport It may include a stream).

MMT Asset (Asset MMT) is a logical data object, for receiving the encoded media data. MMT asset may be composed of MMT asset header and the encoded media data. The encoded media data may be a collective reference to the same group of MPU MMT asset ID. By the directly linked object to the MMT client data of the type that can be individually consumed it may be considered as a separate MMT asset. An example of a data type that can be considered as a separate MMT asset may include MPEG-2 TS, PES, MP4 file, MPEG-U Widget Package, JPEG file or the like.

The encoded media assets of MMT is time data or non-data can be a time. Time data is audio visual media data requiring decoding and synchronized presentation of certain data at the specified time. Non-time data is data of a data type that can be provided and decoded at any time according to the service, or a user interaction service.

The service provider (service provider) is to incorporate the MMT asset MMT asset space - can be placed on the time axis generated multimedia services.

MMT package 160 is a collection of MMT assets that include one or more than one MMT asset 150. The MMT MMT assets within the package can be multiplexed or connection (concatenated) as chain.

MMT package is a container format for the MMT asset and configuration information. MMT package provides a repository of MMT asset and configuration information for the MMT program.

MMT program provider generates configuration information by encapsulating the encoded data into asset MMT and describes the temporal and spatial layout of the MMT assets and their transmission characteristics. MU and MMT assets can be directly sent to the D.1 payload format. Configuration information can be sent by C.1 presentation session management messages. However, MMT program provider and the client to allow the subsequent re-use of the relay or of the MMT program stores this as MMT package format.

It parses the MMT package, MMT program provider determines whether MMT asset is available in which the transmission path (e. G., Broadcast or speed) to the client. Configuration information from the MMT package is sent to the C.1 Presentation Session Management message with transport-related information.

The client learns how to receive MMT assets for which MMT MMT programs are programs that are available and how to receive C.1 presentation session management messages.

MMT package may also be transmitted by the D.1 payload format. MMT packages are delivered and packetized into D.1 payload format. The client receives the packetized MMT package and configure all or a part thereof, and consume MMT program here.

Package information (package information) of MMT package 160, 165 may include configuration information (Configuration Information). Configuration information (Configuration Information) may include additional information such as the list, the package identification information (package identification information), composition information (composition information) (162) and the transmission characteristics (transport characteristics) (164) of MMT asset. The composition information (composition information) (162) includes information on the relationship (relationship) between the MMT assets (150).

In addition, the composition information (composition information) (162) may further include information to indicate the relationship (relationship) between a plurality of MMT package when one of the content (content) is made of a plurality of MMT package. Composition information (composition information) (162) may include information about the temporal and spatial adaptive relationship (relationship) in the MMT package.

Such as information to help transfer and presentation of the MMT package, the composition information of the MMT (Composition Information) provides information on the spatial and temporal relationship between the MMT assets within the MMT package.

MMT-CI is a descriptive language that extends the HTML5 providing such information. If HTML5 is designed to explain the page-based presentation of text-based content, MMT-CI mainly represent the spatial relationships between sources. In order to support the expression tells the temporal relationship between the MMT assets, presentations, consumption various MMT assets in information, time information and HTML5 to determine the transmission and consumption, in order of MMT assets related to the MMT assets in the MMT package, such as presentations Resources which can be expanded to have the additional attribute of the media element. Detailed description will be described later.

Transmission properties (transport characteristics) information 164 includes information on the transmission characteristics, it is possible to provide the information necessary to determine the transmission condition (delivery condition) of each of the MMT assets (or MMT packet). Transmission characteristic information may include traffic description parameters (traffic parameter description) and QoS descriptor (QoS descriptor).

Traffic description parameters may include a bit rate (bitrate) information, and priority (priority) information and the like about the media fragment unit (MFU) (130) or the MPU. Bit rate information may include, for example MMT asset is VBR (Variable BitRate; VBR) or constant bit rate; the bit rate guaranteed for (Constant BitRate CBR) information as to whether the media fragment unit (MFU) (or MPU) (guaranteed bitrate ), it may comprise a maximum bit rate of the media fragment unit (MFU) (or MPU). The traffic description parameters is up to size information of a media fragment unit (MFU) (or MPU) in the can be used for resource scheduling (resource reservation) between servers, clients, and other components on the transmission path, and, for example MMT assets It may contain. The traffic description parameters may be updated periodically or non-periodically.

QoS descriptor includes information for QoS control may include, for example, a delay (delay) information and information loss (loss information). Loss information may include, for example, the loss indicator (loss indicator) as to whether the MMT assets not that the transmission loss (loss delivery) is allowed. For example, it denotes the "lossless" if the loss indicator is '1', '0' may indicate a "lossy". Delay (delay) information may include a delay indicator (delay indicator) used to identify the sensitivity of the transmission delay of the MMT asset. Delay indicator may indicate whether the type of the asset MMT conversation (conversation), interactive (interactive), real-time (real time) and non-real-time (non-realtime).

One of the content (content) can be accomplished in one MMT package. Or one of the content (content) may be made of a plurality of MMT package.

A content (content) with a plurality of composition information (composition information) indicating a time (temporal), spatial (spatial), adaptive (adaptive) relationship (relationship) between the MMT package case made of a plurality of MMT package or configuration information ( configuration information) is present inside the package during the one MMT MMT package or MMT may be on the outside of the package.

For example, a hybrid transmission for (hybrid delivery) content component (content component) some of is transmitted through a broadcasting network (broadcast network) content component (content component) other of the portions is transmitted over a broadband network (broadband network) It can be. For example, for a plurality of AV streams (audiovisual stream) constituting a multi-view service a stream transmitted in a broadcasting network, another stream may be sent to the broadband network, each AV stream is multiplexed to the client terminal It is individually received, may be stored. Or for example, the widget application software is transmitted to the broadband network, AV stream (AV program), such as (widget) may also be present in the scenario that is passed to the existing network.

In the case of multi-view service scenarios and / or a widget (widget) scenario as described above, and the entire plurality of AV streams it may be in one MMT package, in this case one of a plurality of streams may be stored on only one client terminal and, and a part of the MMT package storage content (storage content), a client terminal may need to rewrite the composition information (composition information) or the configuration information (configuration information), and the rewritten content is a new MMT packages that are independent of the server .

In the case of multi-view service scenarios and / or a widget (widget) scenario as described above, each AV stream can be also as a MMT package, in this case, and to a plurality of MMT package to form a single content storage (storage) and is recorded as MMT package unit, there is a need for a composition information, or configuration information showing the relationship (relationship) between the MMT package.

One can refer to the MMT assets within the composition information or configuration information (configuration information) is different MMT package included in the MMT package, and also out-band to the outside of the MMT package referencing the MMT package from (out-band) conditions It can be expressed.

On the other hand, the service provider (service provider) to inform a possible route for delivery of the list and MMT package 160 of the MMT assets 160, to the client terminal MMT package 160 is provided by the can through the control (C) Layer It has been translated into service discovery information (service discovery information) MMT control message may include an information table for service discovery.

Dividing multimedia content into a plurality of segments server assigns a URL information on a plurality of segments that are divided into a predetermined number, and stores the URL information for each of the segments on the media information file and transmits it to the client.

The media information file "media expression technology (MPD: Media Presentation Description), according to the standards organization for standardizing the HTTP streaming can be referred to by various names, such as or" manifest file (Manifest file) '. Hereinafter, the media file will be described and referred to as a media expression technology (MPD).

It will be described below cross-layer interface.

Cross-layer interface (Cross Layer Interface; CLI) provides the means to support QoS by exchanging QoS-related information between the lower layers including an application layer and the MAC / PHY layer in a single object. To the lower layer provides a bottom-up QoS information, such as a network channel while an application layer and provides information related to the media attribute to a top-down QoS information.

Cross-layer interface provides an integrated interface between the various network layers including an application layer and IEE802.11 WiFi, IEEE 802.16 WiMAX, 3G, 4G LTE or the like. Common network parameters of the popular network standards are for static and dynamic QoS control for real-time media applications through a variety of network parameters are extracted by NAM. NAM parameters may include a bit error rate of BER values. BER can be measured in PHY or MAC layer. NAM also provides for identification of the underlying network, available bit rate, buffer state, peak bit rate, service units and service data unit size yusilyul.

The two different methods may be used to provide a NAM. The first way is to provide an absolute value. And the second way is to provide a relative value. The second method can be used for the purpose of updating the NAM during the connection.

Application layer provides a top-down QoS information related to the media attributes for a lower layer. As the MMT asset level information and packet-level information, there are two top-down information. MMT asset information is used for the exchange capacity and / or resources (re-) allocation in the lower layer. Packet-level top-down information is recorded in the appropriate field of the packet to all the lower layers to identify a support QoS level.

Sub-layer provides a bottom-up QoS information to the application layer. Sub-layer provides information relating to the network condition changes over time, which enables faster and more accurate QoS control in the application layer. Bottom-up information is represented in abstracted form in order to support the heterogeneous network environment. These parameters are measured at the lower layer, it is read at the application layer according to the periodic request of the MMT or application.

Or less, in the encoded media data (Media Data) (hereinafter referred to as MMT System) system for transmitting through a heterogeneous IP network (heterogeneous IP network), the title information which can in the context of the media data to provide a media encoder It describes the indicator.

Example # 1

Method for transmitting a media division data (coded media fragment data) encoded in accordance with one embodiment of the present invention by the heterogeneous IP network (heterogeneous IP network) may be performed as shown in FIG. A method of transmitting a media division data encoding in accordance with one embodiment of the present invention, the media unit having a format independent of the particular media codec from the media codec layer; provided with a (Media Unit MU) (S610). It encapsulates the received media service unit generates MMT assets (MMT Asset) (S620). And as described above, encapsulating the MMT asset MMT package (MMT Package) for generating and (S630), receives the MMT package generate MMT payload format (MMT Payload format) and (S640), receives the MMT payload format MMT and it generates a transmission packet (MMT transport packet) (S650).

In one embodiment of the invention, the encoder can pass the information obtained during the system encoding to include a plurality of indicator in the media unit. It will now be described with reference to specific embodiments. It is related to the media data to the minimum amount of information that can be provided by the media encoder according to an embodiment of the invention the encoder indicator may be any access point to generate a media unit; the flag_RAP, which marks the (Random Access Point RAP) encoding includes flag_start_media and flag_end_media representing the start (start) and end (end) of the media data, and a flag_lossless indicator representing whether a media division data transfer during critical (critical) encoding in addition to this. Here, whether or not critical field indicates whether the data which can cause serious problems to the processing at the time of loss of the bit or packet of a media division data encoding unit when transfer media decoder. That is, if the indicator indicates that the critical flag_lossless indicates that loss of a very low tolerance level data. The above-mentioned each indicator may be used in a partially omitted, if necessary.

Hereinafter will be described in detail for each indicator.

flag_RAP is a media division data encoding the random access points; the indicator indicating that you have the (Random Access Point RAP). If the value of Flag_RAP indicator is 1, the encoded media division data indicate that includes the starting point capable of random access (Random access). On the other hand, if the value of Flag_RAP indicator is zero, the encoded media data partitioned represents a do not have a starting point capable of random access (Random access).

flag_start_of_media indicates whether of the first fragment (fragment) of a media division data encoding the encoded sharing the same PTS (presentation time stamp) media data. If the value of the indicator flag_start_of_media one coded media division data included in the media unit represents a having a first fragment of the media data encoded sharing the same PTS. In the same way, the value of the indicator flag_start_of_media is not 1, fragments of the encoded media division data included in the media unit indicates that it is not a first fragment of the media data encoded sharing the same PTS.

flag_end_of_media indicates whether the coded media division data included in the media unit of the last fragment of the media data encoded sharing the same PTS. That is, if the value of flag_end_of_media one coded media division data included in the media unit is shown by having the last fragment of the media data encoded sharing the same PTS.

According to one embodiment of the invention, the indicator value for the fragmentation (Fragmentation) media unit consisting of a single coded media data is not flag_start_of_media == 1, flag_end_of_media == 1.

flag_lossless indicates whether critical for loss of the encoded media data is divided bits or packets included in the media unit. If the value of flag_lossless indicator is 1, the encoded media division data indicate that contains data that may cause a serious problem in the decoding process at the time of the bit or packet loss, the decoder.

Example # 2

Method for transmitting a media division data (coded media fragment data) coded in accordance with another embodiment of the present invention by the heterogeneous IP network (heterogeneous IP network) can proceed as shown in Fig. A method of transmitting the media data encoded in accordance with one embodiment of the present invention is a media processing unit having an independent format for the particular media codec from the media codec layer; begins receiving service (Media Processing Unit MPU) (S710). Media processing unit provided; encapsulates (Media Processing Unit MPU) generates a MMT assets (MMT Asset) (S720). And encapsulates the MMT assets as described above hanba MMT package (MMT Package) for generating and (S730), receives the MMT package generate MMT payload format (MMT Payload format) and (S740), receives the MMT payload format MMT and it generates a transmission packet (MMT transport packet) (S750).

In one embodiment of the invention, the encoder can pass the information obtained during the system encoding to include a number of indicators to the media processing unit (MPU). It will now be described with reference to specific embodiments.

In one embodiment of the invention, the processing unit (Media Processing Unit; MPU) comprises a header portion and a data portion. Data portion includes the encoded media data partitioned. In point the header portion encoding a media division data is capable of random access flag_start_of_media indicator indicating including the start of the flag_RAP indicator, the each of the encoded media division data is encoded media data that indicates whether include (random access point), the indicating including the last part of the coded media data is encoded media data partitioned flag_end_of_media indicator and the header section comprises flag_lossless indicator imprinted if the encoded media data is divided require lossless transmission.

It describes the process of generating the MPU according to the embodiment. In one embodiment of the present invention will be divided into the encoded the encoded media data, a media division data. And it generates a sequence number of a media division data encoding of the division process. Alternatively, instead of generating a sequence number of the encoded media division data may be sequentially inserted into the MPU. The media division data encoding process is the first or last encoded media data partitioned and whether and encoding a media division data of the encoded media data encoded in the can determine whether having a random access point.

It separates the first coded media division data in the encoded media data. The separated coded media data is divided determine whether any of the access points, and inserts the separated encoded media data partitioned in MPU. Since the coded media division data and stores the sequence number of the encoded media data partitioned created flag_start_media. If the sequence number of the divided media data encoded in another embodiment of the present invention has not been issued and stores the relative locations of media-sliced ​​data encoded by the MPU that is inserted. And denoted whether any kind of access point on the flag_RAP. In one embodiment of the present invention flag_RAP indicator it may accept the sequence number of the encoded media data partitioned. Another embodiment flag_RAP indicator of the present invention uses the relative position is a media division data encoding in the MPU is inserted, when the flag_RAP the left bit first bslbf having a rank (bit string, left bit first) indicator, generated coded media data is divided has the random-access point stores 1 in the first bit of flag_RAP, and stores 0 in the first bit does not have a random access point. It can be maintained Lossless_flags value in the same way.

For the next media division data encoding of the encoded media data, and repeats the procedure above. If the generated coded media divided data is the last coded media division data of the encoded media data, and stores the sequence number of the encoded media data partitioned created flag_end_of_media the MPU. And when the encoding of all the media encoding the divided data of the coded media data is finished, it completes the encapsulation of the MPU.

Example # 3

Method for transmitting a media division data (coded media fragment data) coded in accordance with another embodiment of the present invention by the heterogeneous IP network (heterogeneous IP network) can proceed as shown in Fig. A method of transmitting the media data encoded in accordance with one embodiment of the present invention is a media fragment having a unit independent format to a specific media codec from the media codec layer; provided with a (Media Fragment Unit MFU) (S810). Encapsulating the service unit received media fragment media processing unit; generates (Media Processing Unit MPU) (S820). Media processing unit; generates MMT Asset (Asset MMT) encapsulates (Media Processing Unit MPU) (S830). And encapsulates the MMT assets as described above hanba MMT package (MMT Package) for generating and (S840), receives the MMT package generate MMT payload format (MMT Payload format) and (S850), receives the MMT payload format MMT and it generates a transmission packet (MMT transport packet) (S860).

In one embodiment of the invention, the encoder can pass the information obtained during the system encoding to include a plurality of indicators for media fragments unit (MFU). It will now be described with reference to specific embodiments.

It will be described an example in which an indicator that provides the above-described media encoder in MFU applied. The above-described media fragment unit (Media Fragment Unit; MFU) may be used as the output of the media encoder (eg a video encoder or an audio encoder). MFU is in accordance with one embodiment of the present invention is shown in Fig. MFU may be of Mrs. header MFU header (mfu_header) field and a data media data (media_data) field.

According to one embodiment of the invention, the access unit MFU; to separate (Access Unit AU) of one or more coded media division data receives by separating each part of each of the MFU. Separate AU data are received by the media data (media_data) field, the field of each MFU. The header structure of the MFU according to one embodiment of the present invention is shown in Fig. MFU header (mfu_header) field can be used in a form that is passed to the system to create the information in the media encoder to a channel for transmitting information to the system.

Describes the syntax (Syntax) and means (semantics) of MFU header according to the following one embodiment of the present invention. According to one embodiment of the invention, the size of the MFU headers may be designed to have a fixed size for the sake of simplicity (simplicity) a single byte (single byte). That is, the size of the MFU header may be limited to a single byte for the sake of simplicity (simplicity).

Furthermore, can be used in the majority of media codecs (codec media) and the header of the MFU to avoid having a dependency on a particular category of media codecs may consist of at least of information that can be provided by the media encoder. Thus, MFU header according to an embodiment of the present invention minimizes the header size and simplify the structure of the header. Generation of MFU is because the system is not to handle because the access to the media encoder / processing (access / processing) If the MFU header having a complex structure implementation (implementation) is difficult and degrade the usability. Also, configure the MFU header with general information that may assist the media transport and consumption as the information that is most familiar with media encoder. In addition, MFU header when configuring certain media or dependent (dependent) information about a particular media codec is excluded as much as possible.

The structure of the header MFU reference to Figure 5 will be described in more detail. MFU header in accordance with one embodiment of the present invention may include flag_RAP, flag_lossless, flag_start_of_AU and flag_end_of_AU indicator and a reserved area is reserved as shown in FIG. In order to represent the four indicators in the single-flag_RAP, flag_lossless, flag_start_of_AU and flag_end_of_AU indicator is designed to take up the space of one bit. And you can place a reserved area of ​​4 bits for the use of future extensibility. Each indicator may be used in a partially omitted, if necessary.

It will now be described in more detail for each indicator.

flag_RAP includes a media division data encoding comprising the MFU the random access points; the indicator indicating that you have the (Random Access Point RAP). If the value of Flag_RAP indicator is 1, the encoded media division data included in the MFU indicates that includes the starting point capable of random access (Random access). On the other hand, if the value of Flag_RAP indicator 0 indicates a coded media division data included in the MFU does not have an entry point capable of random access (Random access).

flag_lossless is an indicator indicating whether the media data has been critical to the loss of the bit or packet containing the MFU. If the value of flag_lossless indicator is 1, the encoded media division data included in the MFU indicates that contains data that may cause a serious problem in the bit or packet losses in the decoder process.

flag_start_of_AU indicates whether of the first fragment (fragment) of an access unit (AU) to share the encoded media division data, the same PTS (presentation time stamp) included in the MFU. If the value of the indicator flag_start_of_AU one coded media division data included in the MFU shows that having a first fragment of the AU sharing the same PTS. In the same way, the value of the indicator flag_start_of_AU is not 1, fragments of the encoded media division data included in the MFU indicates not the first fragment of the AU sharing the same PTS.

flag_end_of_AU indicates whether the coded media division data included in the MFU of the last fragment of the AU sharing the same PTS. That is, the coded media division data value if the one included in the MFU of flag_end_of_AU represents the last fragment of the AU has a sharing the same PTS. In one embodiment of the invention, the loop lag values ​​of the indicator of men MFU consisting of presentations (Fragmentation) single AU (Single AU) is not flag_start_of_AU == 1, flag_end_of_AU == 1.

Generated in the above-described example MFU are sequentially stored in the MPU may send the media data without having to assign the sequence number of the MFU MFU. Do not allocate any MFU transfer sequence number it is possible to reduce the size of the data. MFU sequence number field is defined as an MFU distinguishing between a MPU as a serial number of the MFU.

It will be described the operation of the decoder in the case did not allocate the MFU sequence number. The decoder at the receiving end decapsulates the received MPU to the received sequence to obtain a MFU sequentially stored in the MPU. The decoder any reference to the header of the MFU approach starting point, to determine the beginning and end of media data, and bit or packet loss during decoding of the MFU has data which can cause serious problems in the decoder process requiring retransmission, or the part a may be omitted.

According to another embodiment of the present invention, a MFU sequence number indicating a sequencing relation between AU of the separate pieces can be displayed by generating a separate field on the MFU. MFU a separate sequence number field in the header MFU (mfu_header) may be used. Or, by using a separate sequence number field MFU addition MFU header (mfu_header) field and the media data (media_data) field in MFU it may store the sequence number for each MFU MFU. Or a media division data media in which data is accommodated encoding (media_data) can be a particular part of the field contains the sequence number MFU. The encoder and decoder may ensure that the order between the media data and matching MFU MFU using the sequence number.

Example # 4

Method for transmitting a media division data (coded media fragment data) coded in accordance with another embodiment of the present invention by the heterogeneous IP network (heterogeneous IP network) may be performed as shown in Fig. A method of transmitting the media data encoded in accordance with one embodiment of the present invention is a media fragment having a unit independent format to a specific media codec from the media codec layer; provided with a (Media Fragment Unit MFU) (S810). Encapsulating the service unit received media fragment media processing unit; generates (Media Processing Unit MPU) (S820). Media processing unit; generates MMT Asset (Asset MMT) encapsulates (Media Processing Unit MPU) (S830). And encapsulates the MMT assets as described above hanba MMT package (MMT Package) for generating and (S840), receives the MMT package generate MMT payload format (MMT Payload format) and (S850), receives the MMT payload format MMT and it generates a transmission packet (MMT transport packet) (S860).

In one embodiment of the invention, the encoder can pass the information obtained during the system encoding to include a number of indicators to the media processing unit (MPU). It will now be described with reference to specific embodiments.

In another embodiment of the invention, MFU stores only the media division data encoding, stores the MFU the MPU successively, corresponding to the first encoded media division data and the last media division data encoding of the AU in the header of the MPU indicated that the MFU, and can mark the MFU corresponding to a media division data encoding with the starting point of random access.

In another embodiment of the present invention stores a media division data and MFU sequence number encoded in the MFU, and the notation a MFU corresponding to the first encoded media division data of the last coded media division data in the AU to the header of the MPU It may denote the MFU corresponding to a media division data encoding with the starting point of random access.

It will be described in detail with respect to another embodiment of the present invention. In yet another embodiment of the present invention MFU includes a media division data encoding and MFU sequence number. And the MPU may include Subsample_start_id, Subsample_end_id and RAP_flags directive.

Subsample_start_id Subsample_end_id and specifies the range (range) of MFU of that AU. By Subsample_start_id it specified mfu_sequence_id shall denote the sequence number of the MFU MFU of MFU belong to the AU. By Subsample_end_id specified mfu_sequence_id will be referred to the last sequence number of the MFU MFU belong to the AU.

And that is RAP_flags AU random access point; indicates whether or not the kind (Random Access Point RAP). If the AU has a random access point RAP_flags may have a value of one. This brought the values ​​of as a series of relative order bit is 1 or 0 on the MFU belonging to each MPU MFU the random access points; may be implemented in a manner that indicated whether or not of the (Random Access Point RAP). If it has any of the random access point in the MFU belonging to one AU, RAP_flags has a non-zero value, if all the MFU have a random access point RAP_flags has a value of zero. Or RAP_flags may accommodate MFU sequence number.

In the same way as RAP_flags MPU may include Lossless_flags imprinted whether the critical data that can cause serious problems during processing in the decoder bit or packet loss for each of the MFU. If AU is having the critical data Lossless_flags may have a value of one. As a continuous sequence of the MPU belongs MFU bits take a value of 1 or 0 may be each MFU a representation of whether the critical data. If any of the critical data with the MFU belonging to one AU, Lossless_flags has a non-zero value, if all the MFU have a random access point Lossless_flags has a value of zero.

That of the critical data, whether or not may be indicated in the MFU level (level) is not in MMT asset level or MMT transport packet level. Mark the required lossless transmission for a single asset as indicated whether to allow the data loss in the MMT assets levels, indicated whether to allow the data loss in the MMT transport packet level, and may require lossless transmission for a packet to be transmitted .

Claims (8)

  1. In the media data transmission method of encoding in a system for transmitting the encoded media data partitioned (coded media fragment data) through a heterogeneous IP network (heterogeneous IP network),
    Receiving service; (MU Media Unit) unit having a media independent format to a specific media codec from the media codec layer;
    Generating a MMT Asset (Asset MMT) to encapsulate said generated media unit;
    Generating MMT package (Package MMT) to encapsulate said generated MMT assets;
    Generating a payload format MMT (MMT Payload format) MMT receives a package the generated; And
    MMT subjected to payload formatting the generated comprising the step of generating the MMT transport packet (Transport Packet MMT),
    The media unit is a header portion and comprising a data portion, and wherein the data portion encoding a media division data (coded media fragment data) and wherein the header portion starting point the encoded media division data is capable of random access to (random access point ) to the end of the indicator, with the encoded media, the divided data are encoded media data (indicator indicating including the start of the coded media data), and the encoded media division data is the encoded media data that indicates whether comprising the media data encoding method characterized in that it comprises an indicator indicating whether included.
  2. According to claim 1,
    The header portion of the media data encoding method according to claim 1, further comprising an indicator to mark whether each of the encoded media data is divided require lossless transmission.
  3. According to claim 1,
    Media unit having a format independent of the particular media codec from the media codec layer; receiving service (Media Unit MU) is
    A media processing unit having a codec-independent format to a particular media from the media codec layer; receiving service (Media Processing Unit MPU) and;
    Generating a MMT Asset (Asset MMT) to encapsulate said generated media unit,
    The encapsulates the media processing unit generates MMT Asset (Asset MMT) a step of generating a media data encoding method characterized in that.
  4. According to claim 1,
    The header portion indicator indicating whether the encoded media division data contains the starting point (random access point) capable of random access, the encoded media division data access unit; if containing the start of the (Access Unit AU) indicating indicator, and the encoded media data dividing the access unit (access unit; AU) the media data encoding method characterized in that it comprises an indicator indicating whether or include the end of the.
  5. In the media data transmission method of encoding in a system for transmitting the encoded media data partitioned (coded media fragment data) through a heterogeneous IP network (heterogeneous IP network),
    Receiving service; (MFU Fragment Media Unit) media fragment having a unit independent format to a specific media codec from the media codec layer;
    Generating a; (MPU Media Processing Unit) media processing unit encapsulates the media fragment unit;
    Generating a MMT Asset (Asset MMT) to encapsulate said generated media processing unit;
    Generating MMT package (Package MMT) to encapsulate said generated MMT assets;
    Generating a payload format MMT (MMT Payload format) MMT receives a package the generated; And
    MMT subjected to payload formatting the generated comprising the step of generating the MMT transport packet (Transport Packet MMT),
    The media unit is a header portion and comprising a data portion, and wherein the data portion encoding a media division data (coded media fragment data) and wherein the header portion starting point the encoded media division data is capable of random access to (random access point ) to the end of the indicator, with the encoded media, the divided data are encoded media data (indicator indicating including the start of the coded media data), and the encoded media division data is the encoded media data that indicates whether comprising the media data encoding method characterized in that it comprises an indicator indicating whether included.
  6. 6. The method of claim 5,
    The header portion of the media data encoding method according to claim 1, further comprising an indicator to mark whether each of the encoded media data is divided require lossless transmission.
  7. 7. The method of claim 6,
    The header portion indicator indicating whether the encoded media division data contains the starting point (random access point) capable of random access, the encoded media division data access unit; if containing the start of the (Access Unit AU) indicating indicator, and the encoded media data dividing the access unit (access unit; AU) the media data encoding method characterized in that it comprises an indicator indicating whether or include the end of the.
  8. The method of claim 7,
    The header portion of the media data encoding method according to claim 1, further comprising an indicator to mark whether each of the encoded media data is divided require lossless transmission.
PCT/KR2012/008337 2011-10-13 2012-10-12 Method for transmitting media data via a heterogeneous ip network independently of a media codec WO2013055162A2 (en)

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YOUNGJU, CHO ET AL.: 'Channel Estimation and Prediction in Cross-Layer Design Using Side- information.' JOURNAL OF THE KOREAN SOCIETY OF BROADCAST ENGINEERING. vol. 16, no. 5, September 2011, pages 797 - 800 *

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Publication number Priority date Publication date Assignee Title
CN106105235A (en) * 2014-01-09 2016-11-09 三星电子株式会社 Method and apparatus of transmitting media data related information in multimedia transmission system

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