CN102594774B - Flow-medium transmission method and system - Google Patents
Flow-medium transmission method and system Download PDFInfo
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- CN102594774B CN102594774B CN201110004651.4A CN201110004651A CN102594774B CN 102594774 B CN102594774 B CN 102594774B CN 201110004651 A CN201110004651 A CN 201110004651A CN 102594774 B CN102594774 B CN 102594774B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/70—Media network packetisation
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Abstract
The present invention relates to a kind of flow-medium transmission method and system, the method includes: streaming media server sends Media Stream, wherein carries media transport layer precedence information；Underlay network device or media forwarding server receive Media Stream, according to preset priority mapping strategy, the media transport layer precedence information in Media Stream are carried out mapping process；Media Stream is processed by the media transport layer precedence information after underlay network device or media forwarding server process according to mapping.Flow-medium transmission method of the present invention and system can effectively promote stream media transmission quality.
Description
Technical field
The present invention relates to multi-medium data transmission technique field, a kind of method being specifically related to streaming media
With system.
Background technology
Along with the universal of network technology and the extensive application of multimedia technology, to audio frequency, video, captions or
The streaming media transmission technique that the content of multimedia such as animation transmit in real time is arisen at the historic moment.
Streaming media server is packaged as Media Stream media contents such as audio frequency, video, captions or animations, matchmaker
Body stream carries out real-time continuous transmission in the form of packets on network, and client need not wait that media content is complete
Subordinate carries complete, only need to postpone just can commence play out for several seconds or tens seconds, and transmission limit, Media Stream limit is play
Until media content finishes or client hang up.Application streaming media transmission technique, can be notable
Shorten the media play waiting time, reduce client-cache requirement.
Different QoS (Quality of Service, service quality) classes is supported during streaming media
Type and grade.QoS type refers to the various QoS mechanism that media transmission bottom-layer network provides, QoS
Grade refers to QoS degree value.QoS transmission is different from the transmission done one's best, and transmission quality can obtain
To ensureing.Normal structure has been defined for the QoS mechanism of double layer network and three-layer network.With traditional IPv4
As a example by packet, in packet, TOS (Type of Service, the type of service) field of 8bit is used to specify point
Process preference in group transmitting procedure, RFC 791 has been divided into 8 priority and can answer front three
For flow point class, the most also provide different delay, handling capacity and the service of reliability to packet；RFC
2474 couples of TOS have carried out definition again, and first six digits is defined as DSCP (Differentiated Services
Code Point, differentiated services code points), for supporting up to 64 kinds different types of traffic prioritizations
Arrange.
But this QoS mechanism is only applicable to double layer network and three-layer network, can not fundamentally promote use
Family is experienced.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of flow-medium transmission method and system, to promote stream
Media transmission quality.
For solving above technical problem, the invention provides a kind of flow-medium transmission method, the method includes:
Streaming media server sends Media Stream, wherein carries media transport layer precedence information；
Underlay network device or media forwarding server receive described Media Stream, reflect according to preset priority
Penetrate strategy and the media transport layer precedence information in described Media Stream is carried out mapping process；
Media transport layer after described underlay network device or media forwarding server process according to mapping is preferential
Described Media Stream is processed by level information.
Further, the media transport layer precedence information in the Media Stream that described streaming media server sends
Including following one or several: data type priority, type of service priority, type of coding are preferential
Level, application layer user experience quality (QoE) mechanism priority, adaptive priority.
Further, transmission message part or the data division of described Streaming Media carries described media transport layer
Precedence information.
Further, the Media Stream that described streaming media server sends also carries Adapted information, described suitable
Join information and include types of adaptations and/or adaptive priority, described types of adaptations include reducing PSI transmitting redundancy,
Packet loss processes or filters enhancement layer, and described media forwarding server is carried out at adaptation according to described Adapted information
Reason.
Further, the Media Stream that described media forwarding server receives carries reduction PSI transmitting redundancy
Adapted information；Media forwarding server receives after described Media Stream, performs following adaptation processing:
Extract and cache the PSI in described Media Stream according to described Adapted information；
Media Stream after forward process, and detect when described PSI changes, the PSI of renewal caching, and to
Client sends the PSI updated.
For solving above technical problem, present invention also offers a kind of stream media transmission system, this system bag
Include streaming media server, underlay network device or media forwarding server, wherein:
Streaming media server, is used for sending Media Stream, wherein carries media transport layer precedence information；
Underlay network device or media forwarding server include:
Receiver module, is used for receiving described Media Stream；
Map processing module, be used for according to preset priority mapping strategy the media in described Media Stream
Transport layer precedence information carries out mapping process；
Media Stream processing module, the media transport layer precedence information after processing according to mapping is to described
Media Stream processes.
For reducing PSI transmitting redundancy, present invention also offers another kind of flow-medium transmission method, the method
Including:
Streaming media server sends Media Stream, and described Media Stream carries the adaptive letter reducing PSI transmitting redundancy
Breath；
Media forwarding server receives described Media Stream, extracts and cache described matchmaker according to described Adapted information
PSI in body stream；
Media Stream after described media forwarding server forward process, and detect when described PSI changes,
Update the PSI of caching, and send the PSI updated to client.
Further, the Media Stream that described streaming media server sends also carries packet loss process or filter increasing
The Adapted information of strong layer, the data stream that described media forwarding server forwards is the matchmaker after adaptation processing
Body stream.
Corresponding to above method, present invention also offers a kind of stream media transmission system, this system includes stream
Media server and media forwarding server, wherein:
Streaming media server, is used for sending Media Stream, and described Media Stream carries and reduces PSI transmitting redundancy
Adapted information；
Media forwarding server includes:
Receiver module, is used for receiving described Media Stream；
Extract cache module, for extracting and cache the PSI in described Media Stream according to described Adapted information；
Detect when described PSI changes, update the PSI of caching；
Forwarding module, the Media Stream after forward process, and when detecting that described PSI changes to visitor
Family end sends the PSI updated.
Flow-medium transmission method of the present invention carries with streaming media server transmission Media Stream in system and meets media
The precedence information of transport layer priority mechanism；In the network transmission process of Media Stream, bottom-layer network or
After person's media forwarding server carries out mapping process according to preset priority mapping strategy, further according to mapping
Media Stream is processed by the precedence information after process, thus promotes media transmission efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of flow-medium transmission method of the present invention；
Fig. 2 is the modular structure schematic diagram of stream media transmission system of the present invention；
Fig. 3 is the modular structure schematic diagram of media forwarding server of the present invention；
Fig. 4 is the instantiation schematic diagram of a communication system；
Fig. 5 is media packet structure example schematic diagram；
Fig. 6 is a Media layer precedence field topology example schematic diagram；
Fig. 7 describes the process stream of Streaming Media forwarding server in the adaptive embodiment reducing PSI transmitting redundancy
Journey；
Fig. 8 describes streaming media clients program request flow process in the adaptive embodiment reducing PSI transmitting redundancy.
Detailed description of the invention
Face the Stream Media Application new scene of across a network and heterogeneous network, must in order to promote end user's experience
Must promote stream media transmission quality, matter of the present invention is requiring that Media Stream can provide comprehensive sum from top to bottom
Directly media transport layer precedence information, fast for bottom-layer network (including double layer network or three-layer network)
Speed identifies Media Stream and processes priority, it is achieved media transport layer priority is to bottom QoS mechanism grade
Directly map.
In existing Streaming transfer protocol, such as, RTP (the Real-time Transport of normal structure IETF
Protocol, RTP) RTP to fix packet header (Fix Header) and RTP load packet header equal
Do not carry precedence information；MPEG-2 (the Moving Pictures Experts of normal structure ISO
Group, Motion Picture Experts Group) TS (Transport Stream, transmission stream) only one bit of definition
Priority tag, institute's offer information deficiency realizes above-mentioned requirements.The present invention will be described below.
Flow-medium transmission method of the present invention is that streaming media server sends Media Stream with the main thought of system,
Media Stream carries the precedence information meeting media transport layer priority mechanism；Network at Media Stream transmits
During, bottom-layer network or media forwarding server map according to preset priority mapping strategy
After process, Media Stream is processed by the precedence information after processing further according to mapping, thus promotes media
Efficiency of transmission, obtains optimal media transmission effect.
In the present invention, the logic or the thing that provide media transport layer forwarding capability during media flow transmission
Reason equipment is referred to as media forwarding server,
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.It should be noted that
In the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
As it is shown in figure 1, flow-medium transmission method includes:
Step 101: streaming media server sends Media Stream, and it is preferential that described Media Stream carries media transport layer
Level information；
Media transport layer precedence information in the Media Stream that described streaming media server sends includes but does not limits
In following media transport layer precedence information: data type priority, type of service priority, coding class
Type priority, application layer user experience quality (QoE) mechanism priority, adaptive priority, specifically real
Now, one of which media transport layer precedence information or media transport layer priority letter can be used
Breath, the present invention does not limits.
Hereinafter various media transport layer precedence informations are illustrated:
One, data message (also referred to as data type priority)
Instruction is carried on the data type priority of media stream packet, and different types of data has when transmission
Different priority.Data type at least can be divided into business datum, program data, media data three
Class, more supplementing does not limits.Wherein, business datum provides the mutual pass of service provider, program category, program
The information such as system, event, time, such as DVB (Digital Video Broadcasting, DVB)
SI (Service Information, business information)；Program data provide the programme information in single medium stream,
The PSI of the information, such as TS such as the composition of program and mutual relation (Program Specific Information,
Program Specific Information)；Media data includes the medium types such as video flowing, audio stream, caption stream, picture.
Two, business information, also referred to as type of service priority
Instruction is carried on the type of service priority of media stream packet, and different service types has when transmission
Different priority.According to transmission (traffic) feature include code check, time delay, buffer, shake, packet loss,
Type of service at least can be divided into that IPTV is live, IPTV program request, audio broadcasting, video monitoring, can
Depending on types such as communication, captions, more supplementing does not limits.
Three, coding information, also referred to as type of coding priority
Instruction is carried on the media frame type priority level of media stream packet, and different media frame types are when transmission
There is different priority.Media frame type is relevant to type of coding, such as to H264 Video coding, and can
To be divided into IDR (Instantaneous Decode Refresh, instantaneous decoding refresh), Intra, B, P,
SVC is encoded, Primary layer and enhancement layer can be divided, MVC coding can be divided primary and secondary visual angle
Deng.
Four, application layer QoE scheme information, is called for short AppQoEtools information, also referred to as application layer QoE machine
Priority processed
Instruction is carried on application layer QoE of media stream packet, and (the quality i.e. user's body of of experience is checked the quality
Amount) mechanism priority, different application layer QoE mechanism type has different priority when transmission.Including
But it is not limited to existing QoE mechanism, such as ARQ (Automatic Repeat Requst, autonomous retransmission),
FEC (Forward Error Correction, forward error correction) etc..
Five, Adapted information, also becomes adaptive priority
Instruction is carried on the Media layer adaptation priority of media stream packet, and different adaptation processing correspondences is different
Priority, adaptation processing refers to carry out Media layer transmission the function of adaptation, and such as SVC is adaptive, business
The Media layer adaption functions such as data and program data adaptation.
Adaptation is carried out during media flow transmission.Such as in Internet, router is according to own cache shape
State carries out packet loss process to Media Stream；Such as in application layer or media transport layer, media forwarding server
According to bottom-layer network situation to SVC (Scalable Video Coding, can layered video coding) enhancement layer
Filter, etc..
For each precedence information in above-mentioned media transmission priority mechanism, set up the biography of every kind of priority
Defeated quantification gradation, every kind of particular type has the quantized value of correspondence.The one side of presenting of transport layer priority
Formula is directly to represent the quantized value of various priority, and another kind of presentation mode is the quantization according to each priority
Value calculates an integrated value, and computation rule does not limits.No matter taking which kind of presentation mode above-mentioned, underlying network
Network all need not understand media information, just quickly streaming media layer priority mechanism can be mapped to the end
Layer network QoS mechanism.
According to existing Streaming transfer protocol, it is carried on the Streaming Media packet on bottom-layer network generally by passing
Transmission information, load information and data three part are constituted.
Can the most described media transport layer precedence information be positioned over transmission message part carry.Such as,
MPEG-2 TS packet header or RTP packet header are extended, extended field carry described media and passes
Defeated layer priority.
Optimization in view of redundancy is transmitted, it is also possible to described media transport layer precedence information is placed
Carry in data division, such as, the PSI of MPEG-2 TS is extended, in PSI growth data
Carry described media transport layer priority.Only in the case of special case, carry institute by above-mentioned transmission message part
State media transport layer priority.
Step 102: underlay network device or media forwarding server receive described Media Stream, according to preset
Priority mapping strategy the precedence information in described Media Stream is carried out mapping process；
In network transmission process, underlay network device reads described media transport layer priority from Media Stream
Information, is bottom-layer network QoS priority according to mapping policy fast mapping.
Media forwarding server (such as network internal forwarding server or network edge in network transmits
Forwarding server) identify described media transport layer precedence information, according to mapping policy fast mapping
For corresponding forwarding priority.
Various information in the comprehensive described media transmission priority mechanism of mapping policy, different QoS mechanism is permissible
Take different mappings strategy.The media transmission priority of Media Stream remains constant in transmitting procedure,
Can be good at support approach network and use different QoS transmission mechanism and grade.
Step 103: described underlay network device or media forwarding server process according to mapping after preferential
Described Media Stream is processed by level information.
In order to carry out adaptation processing, the Media Stream that described streaming media server sends also carries Adapted information,
Described Adapted information includes types of adaptations and/or adaptive priority, and described types of adaptations includes that reducing PSI passes
Defeated redundancy, packet loss process or filter enhancement layer, and described media forwarding server enters according to described Adapted information
Row adaptation processing.
If the Media Stream that described media forwarding server receives carries the adaptive letter reducing PSI transmitting redundancy
Breath；Media forwarding server receives after described Media Stream, performs following adaptation processing:
Extract and cache the PSI in described Media Stream according to described Adapted information；
Media Stream after forward process, and detect when described PSI changes, the PSI of renewal caching, and to
Client sends the PSI updated.
Corresponding to above method, present invention also offers a kind of stream media transmission system, as in figure 2 it is shown,
This system includes streaming media server, underlay network device or media forwarding server, wherein:
Streaming media server, is used for sending Media Stream, and described Media Stream carries media transport layer priority letter
Breath；
Underlay network device or media forwarding server include:
Receiver module, is used for receiving described Media Stream；
Map processing module, be used for according to preset priority mapping strategy the media in described Media Stream
Transport layer precedence information carries out mapping process；
Media Stream processing module, the media transport layer precedence information after processing according to mapping is to described
Media Stream processes.
Further, the media transport layer precedence information in the Media Stream that described streaming media server sends
Including following one or several: data type priority, type of service priority, type of coding are preferential
Level, application layer user experience quality (QoE) mechanism priority, adaptive priority.Each precedence information
The most as mentioned before.
Further, transmission message part or the data division of described Streaming Media carries described media transport layer
Precedence information.
Also carrying Adapted information in the Media Stream that described streaming media server sends, described Adapted information includes
Types of adaptations and/or adaptive priority, described types of adaptations includes reducing PSI transmitting redundancy, packet loss processes
Or filtration enhancement layer, described media forwarding server carries out adaptation processing according to described Adapted information.
The Media Stream that described media forwarding server receives carries the Adapted information reducing PSI transmitting redundancy
Time, unlike underlay network device, as it is shown on figure 3, the Media Stream of media forwarding server processes
Module includes:
Extract cache sub-module, for extracting and cache according to described Adapted information in described Media Stream
PSI；And detect when described PSI changes, update the PSI of caching,
Forward submodule, the Media Stream after forward process, and detect when described PSI changes, to
Client sends the PSI updated.
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in detail.
Fig. 4 gives the instantiation of a communication system, and wherein network 1 includes streaming media server
10, router 11, router 12a and media forwarding server 12b, network 2 includes router 13,
Network 3 includes router 14.This communication system is for packet count such as audio frequency, video, captions, data
According to network transmission and forward.This communication system network layer uses IP agreement, and data link layer uses
DWDM or ATM etc. do not limit.
Media Stream is as follows in the forwarding step of this communication system:
Step A, in network 1, streaming media server 10 exports various Media Stream in real time.
Fig. 5 provides media packet structure example, and in this example, media transmission form uses MPEG-TS,
QoS mechanism uses Diff-Serv.Media packet is by IPv4 packet header, TS packet header, PES packet header and media number
Constitute according to four parts.Tos field in IPv4 packet header for Diff-Serv (Differentiated Services,
Differentiated Services).The value of tos field changes during media flow transmission, and router gives different
Diff-Serv.Transport layer precedence field in TS packet header is extended field, and extended mode follows TS mark
Accurate.For carrying priority of the present invention.
A kind of presentation mode of transport layer priority is directly to represent each dimension quantized value, the another kind side of presenting
Formula is to calculate an integrated value according to each dimension quantized value.Take to calculate the priority side of presenting of integrated value
Formula is the simplest, it is only necessary to Media layer precedence field supports certain quantization modulation, such as 8bit length
Support the quantization modulation of 0-255.Take the presentation mode representing each dimension quantized value somewhat more complex, need
Will in Media layer precedence field Further Division territory.
Fig. 6 provides the Media layer precedence field topology example representing each dimension amount quantized value.The matchmaker of example
Body layer precedence field is made up of, respectively six territories (field): data message territory, business information territory,
Coding information field, AppQoEtools territory, Adapted information territory and reserved field.Media layer precedence field is long
Degree is such as 32bit；Front four territories respectively take 4bit, domain value range 0-15, and corresponding priority is from low to high；
It is priority bit that Adapted information territory takies 8bit, front 4bit, domain value range 0-15, and corresponding priority is from low
To height, rear 4bit is type bit, domain value range 0-15, corresponding types of adaptations；One territory of reserved field takies
8bit。
Based on above-mentioned example, a video is SVC (Scalable Video Codeing, graduated encoding)
Two classifications, the IPTV multicast live TV streams of offer FEC (Forward Error Correction, forward error correction)
Media layer precedence field as follows:
Data message territory: give priority 0 for PSI, gives priority 1 for SI, composes for voice data
Give priority 2, give priority 3 for video data；
Business information territory: for IPTV live imparting priority 1；
Coding information field: the IDR for video SVC Primary layer gives priority 0, for video SVC base
The non IDR of this layer gives priority 1, and the IDR for video SVC enhancement layer gives priority 2, for
The non IDR of video SVC enhancement layer gives priority 3；
AppQoEtools territory: priority corresponding to FEC mechanism is 2；
Adapted information territory: types of adaptations is for reducing PSI transmitting redundancy, and priority is 0；
Reserved field: be defaulted as 0.
Step B, Media Stream flow through router 11, and router 11 is to Media Stream application Diff-serv, application
Local policy is mapped as the tos field in IPv4 packet header the Media layer precedence field of Media Stream, then
Media Stream QoS is transferred to router 12a.
After step C, router 12a receive Media Stream, after carrying out mapping process, it is transmitted to same node
Media forwarding server 12b；Media forwarding server 12b according to the feature of network 2 and network 3 to media
Stream carries out mapping process, Media layer adaptation, and the Media Stream after adaptation passes through router 12a QoS respectively
It is defeated by the router 13 of network 2 and the router 14 of network 3.
Here router 12a can perform new Diff-serv strategy, and application local policy changes Media Stream
The ToS value in IP packet header；Or applying other QoS mechanism, such as application local policy is excellent Media layer
First level is mapped as MPLS (Multi-Protocol Label Switching, multiprotocol label switching).
Step D, 13 Media Stream QoS of router are transferred to network node 15a and 15b, router 14
Media Stream QoS is transferred to network node 15d and 15e, carries out media play.
Hereinafter the adaptation of media forwarding server is described in detail:
The example 1 that Media layer is adaptive:
Media video type of coding uses SVC.Streaming media server 10 exports the SVC of spatial hierarchy and regards
Frequency stream, wherein SVC Primary layer size be QVGA, SVC enhancement layer size be VAG.
Network 2 towards terminal be the mobile hand-held devices such as 15a, 15b, video resolution use QVGA；
Network 3 uses VGA towards the PC such as 15d, 15e and television equipment, video resolution.
Media forwarding server 12b refers to according to carrying SVC adaptation in the adaptive precedence information of Media Stream
Showing, network-oriented 2 filters out the SVC in video flowing and strengthens stream, and network-oriented 3 does not do at any adaptation
Reason.
The example 2 that Media layer is adaptive:
Reducing PSI transmitting redundancy, media forwarding server identifies the Adapted information territory in Media Stream,
This media packet filters out from Media Stream, is cached in this locality and safeguards renewal.Only when client 15c
The PSI of caching is just sent the when that addition multicast being live or PSI changes.Fig. 7 and Fig. 8 is given detailed
Handling process describes.
Fig. 7 describes and reduces Streaming Media forwarding in the adaptive embodiment of PSI redundancy transmission in MPEG-TS
The handling process of server.Process is as follows:
Step 701, streaming media server 10 send the multicast media stream in above-mentioned example with original PSI；
Step 702, media forwarding server 12b receive multicast media stream, media forwarding server 12b
Identify the Adapted information territory in Media Stream；
Step 703, media forwarding server 12b filter the original PSI in (i.e. extraction) Media Stream, and
It is cached in this locality；
Step 704, media forwarding server 12b apply other media transmission adaptation strategies, the most such as
In above-mentioned example, network-oriented 2 filters out the SVC enhancing stream in video flowing, may relate to PSI more herein
Newly；
Whether step 705, media forwarding server 12b detection PSI changes, as change then performs step
706, otherwise perform step 708；
The PSI of step 706, media forwarding server 12b caching change；
Step 707, media forwarding server 12b send the PSI updated；
Step 708, media forwarding server 12b forward the Media Stream after adaptation.
Fig. 8 describes streaming media clients program request flow process in the adaptive embodiment reducing PSI transmitting redundancy.Cross
Journey is as follows:
Step 801, client 15c select IPTV multicast live；
Step 802, client 15c add multicast group；
Step 803, router 12a notify media forwarding server 12b；
Step 804, media forwarding server 12b send the PSI of caching；
Step 805, client 15c initialize decoding resource according to PSI；
Step 806, media forwarding server 12b carry out other media adaptations, and code stream is transmitted to route
Device 12a, router 12a forwarding media stream to client 15c；
The multicast media stream received is decoded presenting by step 807, client 15c.
Said process is a kind of realization of the adaptation method reducing PSI transmitting redundancy, any utilizes this design
Thought and any equivalent transformation thereof realize reducing the method for redundancy transmission in TS stream or similar transmission stream,
Protection scope of the present invention all should be belonged to.
Present invention also offers another kind of flow-medium transmission method, the method focuses on media and forwards service
Device carries out adaptation according to Adapted information, specifically includes:
Streaming media server sends Media Stream, and described Media Stream carries the adaptive letter reducing PSI transmitting redundancy
Breath；
Media forwarding server receives described Media Stream, extracts and cache described matchmaker according to described Adapted information
PSI in body stream；
Media Stream after described media forwarding server forward process, and detect when described PSI changes,
Update the PSI of caching, and send the PSI updated to client.
Process it addition, the Media Stream of described streaming media server transmission is gone back portability packet loss or filter enhancing
The Adapted information of layer, the data stream that described media forwarding server forwards is the media after adaptation processing
Stream.
Corresponding above method, present invention also offers another kind of stream media transmission system, and this system includes stream
Media server and media forwarding server, wherein:
Streaming media server, is used for sending Media Stream, and described Media Stream carries and reduces PSI transmitting redundancy
Adapted information；
Media forwarding server includes:
Receiver module, is used for receiving described Media Stream；
Extract cache module, for extracting and cache the PSI in described Media Stream according to described Adapted information；
Detect when described PSI changes, update the PSI of caching；
Forwarding module, the Media Stream after forward process, and when detecting that described PSI changes to visitor
Family end sends the PSI updated.
Further, the Media Stream that described streaming media server sends also carries packet loss process or filter increasing
The Adapted information of strong layer, the data stream that described media forwarding server forwards is the matchmaker after adaptation processing
Body stream.
The flow-medium transmission method of present invention proposition and system, propose a kind of brand-new media transport layer preferential
Level mechanism, it is established that media transport layer priority to the fast mapping of bottom-layer network priority, supports matchmaker
Body forwards and carries out media adaptation in network, supports bottom various QoS transmission mechanism, can effectively promote stream
Media transmission quality.
It is to be herein pointed out the specific embodiment in the present invention simply lists the indivedual real of the present invention
Example, uses the design philosophy of the present invention and any equivalent transformation thereof to realize flow-medium transmission method and system,
Protection scope of the present invention all should be belonged to.
One of ordinary skill in the art will appreciate that all or part of step in said method can pass through program
Instructing related hardware to complete, described program can be stored in computer-readable recording medium, as read-only
Memorizer, disk or CD etc..Alternatively, all or part of step of above-described embodiment can also use
One or more integrated circuits realize.Correspondingly, each module in above-described embodiment can use hardware
Form realize, it would however also be possible to employ the form of software function module realizes.The present invention is not restricted to any spy
The combination of the hardware and software of definite form.
Claims (12)
1. a flow-medium transmission method, it is characterised in that the method includes:
Streaming media server sends Media Stream, wherein carries media transport layer precedence information and adaptive letter
Breath, described Adapted information includes reducing Program Specific Information PSI transmitting redundancy；
Underlay network device or media forwarding server receive described Media Stream, reflect according to preset priority
Penetrate strategy and the media transport layer precedence information in described Media Stream is carried out mapping process；
Media transport layer after described underlay network device or media forwarding server process according to mapping is excellent
Described Media Stream is processed by first level information；
Described media forwarding server receives after described Media Stream, performs following adaptation processing:
Extract and cache the PSI in described Media Stream according to described Adapted information；
Media Stream after forward process, and detect when described PSI changes, update the PSI of caching, and
The PSI updated is sent to client.
2. the method for claim 1, it is characterised in that: described streaming media server sends
Media transport layer precedence information in Media Stream include following one or several: data type is preferential
Level, type of service priority, type of coding priority, application layer user experience quality QoE mechanism is preferential
Level, adaptive priority.
3. the method for claim 1, it is characterised in that: the transmission information portion of described Streaming Media
Divide or data division carries described media transport layer precedence information.
4. the method for claim 1, it is characterised in that: described Adapted information also includes packet loss
Process or filter enhancement layer.
5. a stream media transmission system, it is characterised in that this system includes streaming media server, the end
Layer network device or media forwarding server, wherein:
Streaming media server, is used for sending Media Stream, wherein carries media transport layer precedence information and fits
Joining information, described Adapted information includes reducing Program Specific Information PSI transmitting redundancy；
Underlay network device or media forwarding server include:
Receiver module, is used for receiving described Media Stream；
Map processing module, be used for according to preset priority mapping strategy the media in described Media Stream
Transport layer precedence information carries out mapping process；
Media Stream processing module, the media transport layer precedence information after processing according to mapping is to described
Media Stream processes, including:
Extract cache sub-module, for extracting and cache according to described Adapted information in described Media Stream
PSI；And detect when described PSI changes, update the PSI of caching,
Forward submodule, the Media Stream after forward process, and detect when described PSI changes, to
Client sends the PSI updated.
6. system as claimed in claim 5, it is characterised in that: described streaming media server sends
Media transport layer precedence information in Media Stream include following one or several: data type is preferential
Level, type of service priority, type of coding priority, application layer user experience quality QoE mechanism is preferential
Level, adaptive priority.
7. system as claimed in claim 5, it is characterised in that: the transmission information portion of described Streaming Media
Divide or data division carries described media transport layer precedence information.
8. system as claimed in claim 5, it is characterised in that: described Adapted information also includes packet loss
Process or filter enhancement layer.
9. a flow-medium transmission method, it is characterised in that the method includes:
Streaming media server sends Media Stream, and described Media Stream carries reduction Program Specific Information PSI transmission
The Adapted information of redundancy；
Media forwarding server receives described Media Stream, extracts and cache described matchmaker according to described Adapted information
PSI in body stream；
Media Stream after described media forwarding server forward process, and detect when described PSI changes,
Update the PSI of caching, and send the PSI updated to client.
10. method as claimed in claim 9, it is characterised in that: described streaming media server sends
Also carrying the Adapted information that packet loss processes or filters enhancement layer in Media Stream, described media forwarding server turns
The data stream sent out is the Media Stream after adaptation processing.
11. 1 kinds of stream media transmission systems, it is characterised in that this system includes streaming media server and matchmaker
Body forwarding server, wherein:
Streaming media server, is used for sending Media Stream, and described Media Stream carries reduction Program Specific Information PSI
The Adapted information of transmitting redundancy；
Media forwarding server includes:
Receiver module, is used for receiving described Media Stream；
Extract cache module, for extracting and cache the PSI in described Media Stream according to described Adapted information；
Detect when described PSI changes, update the PSI of caching；
Forwarding module, the Media Stream after forward process, and when detecting that described PSI changes to visitor
Family end sends the PSI updated.
12. systems as claimed in claim 11, it is characterised in that: described streaming media server sends
Media Stream in also carry packet loss process or filter enhancement layer Adapted information, described media forwarding server
The data stream forwarded is the Media Stream after adaptation processing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110004651.4A CN102594774B (en) | 2011-01-11 | 2011-01-11 | Flow-medium transmission method and system |
| PCT/CN2012/070215 WO2012094998A1 (en) | 2011-01-11 | 2012-01-11 | Method, system and device for transferring streaming media |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110004651.4A CN102594774B (en) | 2011-01-11 | 2011-01-11 | Flow-medium transmission method and system |
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| CN103795996B (en) * | 2012-11-01 | 2016-08-03 | 上海贝尔股份有限公司 | 3D delivery of video method and apparatus |
| CN105357144B (en) * | 2014-08-20 | 2019-10-29 | 联想(北京)有限公司 | A kind of data processing method and electronic equipment |
| CN106330845A (en) * | 2015-07-02 | 2017-01-11 | 中兴通讯股份有限公司 | Method and apparatus for transmitting streaming media data |
| CN105142181B (en) * | 2015-08-07 | 2018-05-18 | 上海斐讯数据通信技术有限公司 | A kind of radio reception device message priority-level mapping method and system |
| CN106559683B (en) * | 2016-11-16 | 2020-05-19 | 浙江宇视科技有限公司 | QoS priority dynamic adjustment method and device for monitoring service |
| CN109005126B (en) | 2017-06-06 | 2020-06-02 | 华为技术有限公司 | Data stream processing method, device and computer readable storage medium |
| CN109166606A (en) * | 2018-08-31 | 2019-01-08 | 上海轩昂医疗科技有限公司 | A kind of electronic health record online editing platform and its implementation |
| CN115242891A (en) * | 2021-04-23 | 2022-10-25 | 花瓣云科技有限公司 | Data transmission method, system and related device |
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| US20030055920A1 (en) * | 2001-09-17 | 2003-03-20 | Deepak Kakadia | Method and apparatus for automatic quality of service configuration based on traffic flow and other network parameters |
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