CN106464985B

CN106464985B - A kind of media stream transmission method and device

Info

Publication number: CN106464985B
Application number: CN201580026048.2A
Authority: CN
Inventors: 夏海涛; 熊春山; 韦安妮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2019-04-12
Anticipated expiration: 2035-04-30
Also published as: WO2016172967A1; CN106464985A

Abstract

The embodiment of the invention discloses a kind of media stream transmission method and devices, are related to field of communication technology, and the real-time that user equipment obtains media stream file can be improved.Main design thought are as follows: server is by the way of active transmission, after receiving the first media transmission request that downstream node is sent, it is requested according to the first media transmission, i-th of media fragment that code rate is the first code rate is sent to downstream node, and then sends the i+1 media fragment that code rate is the first code rate to downstream node.Wherein, media stream file to be transmitted is divided into N number of continuous media fragment, and 1≤i < N, i and N are positive integer.

Description

A kind of media stream transmission method and device

Technical field

The present invention relates to field of communication technology more particularly to a kind of media stream transmission methods and device.

Background technique

Hypertext transfer protocol dynamic self-adapting stream (English: Dynamic Adaptive Streaming over HTTP, Abbreviation: DASH) it is a kind of media flow transmission technology that the code rate loaded on the http protocol is adaptive.

Using DASH technology, media stream file to be transmitted (for example, video file, audio file etc.) is divided into multiple Continuous media fragment (English: segment), for each media fragment, server provides the version of multiple and different code rates It is selected for user equipment.User equipment describes (English: Media according to the media exhibition of media stream file to be transmitted Presentation Description, abbreviation: MPD) file and itself assessment network condition (such as: quality of wireless channel) Media transmission request is sent to server, with the media fragment of the specific code rate of request.Wherein, the MPD file is for describing The storage format of media stream file to be transmitted, the storage format including each media fragment.Server is receiving user After the media transmission request that equipment is sent, the media fragment of the specific code rate is sent to user equipment.But due to server Multiple network nodes of end-to-end transmission experience carrier network between user equipment, when the state dynamic change of network When, especially when congestion occurs for network, the actual transmissions time delay between user equipment and server is longer, therefore, Yong Hushe The standby real-time for obtaining media stream file to be transmitted is difficult to ensure.

In order to improve the real-time that user equipment obtains media stream file to be transmitted, a kind of side is provided in the prior art Method: there is the DASH agent entity of caching capabilities in the network node setting close to user equipment, DASH agent entity can incite somebody to action The each media fragment obtained from server caches.When DASH agent entity receives the specific code rate of user equipment transmission Media transmission request when, if being cached with the media fragment of the specific code rate in DASH agent entity, DASH agent entity to User equipment sends the media fragment of the code rate；If the media fragment of the uncached specific code rate, DASH in DASH agent entity Agent entity then needs further to send media transmission request to server, with the media fragment of the request code rate, when After DASH agent entity receives the media fragment of the code rate of server transmission, the media fragment of the code rate is sent to user Equipment.

The above method has the following problems: server is only in the media transmission request for receiving the transmission of DASH agent entity Afterwards, the media fragment of the specific code rate is just sent to DASH agent entity, therefore, if acting on behalf of without other users equipment to DASH Entity requests cross the media fragment of the specific code rate, then the media fragment of the specific code rate will not be cached in DASH agent entity, Then server passes through DASH there is still a need for the media transmission request from DASH client forwarded from DASH agent entity is waited Agent entity forwards the media fragment of the specific code rate to user equipment, still not can effectively solve user using the above method and sets The problem of standby real-time for obtaining media stream file to be transmitted.

Summary of the invention

The embodiment of the present invention provides a kind of media stream transmission method and device, and user equipment can be improved and obtain Media Stream The real-time of file.

In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that

The embodiment of the present invention in a first aspect, providing a kind of media stream transmission method, comprising:

Server receives the first media transmission request that downstream node is sent, and the is carried in first media transmission request A piece of segment information, the media fragment that first segment information is used to indicate request is i-th of media stream file to be transmitted Media fragment；

The server is requested according to first media transmission, and it is the first code rate that Xiang Suoshu downstream node, which sends code rate, I-th of media fragment；

The server sends the i+1 media fragment that code rate is first code rate to the downstream node；

Wherein, the media stream file to be transmitted is divided into N number of continuous media fragment, and 1≤i < N, i and N are Positive integer.

With reference to first aspect, in the first possible implementation of the first aspect, the server is to the downstream Node sends the i+1 media fragment that code rate is first code rate, comprising:

The server determines that the first moment, first moment are according to the playing duration of i-th of media fragment At the time of sending the i+1 media fragment；

The server sends code rate to the downstream node at first moment as described the i-th of first code rate + 1 media fragment.

With reference to first aspect or the first possible implementation of first aspect, second in first aspect are possible In implementation, the server is requested according to first media transmission, and it is first yard that Xiang Suoshu downstream node, which sends code rate, I-th of media fragment of rate, comprising:

The server determines first code rate according to strategy predetermined；

The server sends i-th of media fragment that code rate is first code rate to the downstream node.

With reference to first aspect or the first possible implementation of first aspect, the third in first aspect are possible In implementation, the first code rate information is also carried in the first media transmission request, first code rate information is used to indicate The code rate of the media fragment of request is first code rate；

The server is requested according to first media transmission, and it is the first code rate that Xiang Suoshu downstream node, which sends code rate, I-th of media fragment, comprising:

The server determines first code rate according to first code rate information；

With reference to first aspect with above-mentioned possible implementation, in a fourth possible implementation of the first aspect, If 1≤i < N-1, the i+1 media piece that code rate is first code rate is sent to the downstream node in the server After section, the method also includes:

The server sends the i-th+2 media fragments that code rate is first code rate to the downstream node.

With reference to first aspect with above-mentioned possible implementation, in the fifth possible implementation of the first aspect, The method also includes:

The server receives the second media transmission request that the downstream node is sent, the second media transmission request Second segment information of middle carrying and the second code rate information, the media fragment that second segment information is used to indicate request is described J-th of media fragment of media stream file to be transmitted, 1≤j≤N, j are positive integer, and second code rate information is used to indicate The code rate of the media fragment of request is the second code rate, and second code rate is different from first code rate；

The server is requested according to second media transmission, and it is the second code that Xiang Suoshu downstream node, which sends code rate, J-th of media fragment of rate.

With reference to first aspect with above-mentioned possible implementation, in the sixth possible implementation of the first aspect, Before the first media transmission request that the server receives that downstream node is sent, the method also includes:

The server is established hypertext transfer protocol http session with the downstream node and is connect；

The server receives the push function that the downstream node is sent and enables message, and the push function enables message It is used to indicate the continuous media fragment that the server sends the same media stream file of same code rate to the downstream node.

With reference to first aspect with above-mentioned possible implementation, in a seventh possible implementation of the first aspect, The downstream node is user equipment；Alternatively, the downstream node is hypertext transfer protocol dynamic self-adapting stream DASH agency Entity.

The second aspect of the embodiment of the present invention provides a kind of media stream transmission method, comprising:

User equipment sends the request of the first media transmission to server, carries first in the first media transmission request Segment information, the media fragment that first segment information is used to indicate request is i-th of media of media stream file to be transmitted Segment；

The user equipment receives i-th of media fragment that the code rate that the server is sent is the first code rate；

The user equipment receives the i+1 media fragment that the code rate that the server is sent is first code rate；

In conjunction with second aspect, in the first possible implementation of the second aspect, in the user equipment to service Before device sends the request of the first media transmission, the method also includes:

The local cache of user equipment described in the user equipment access is not looked into the local cache of the user equipment Find i-th of media fragment.

In conjunction with the possible implementation of the first of second aspect or second aspect, second in second aspect is possible In implementation, i-th of media piece that the code rate that the server is sent is the first code rate is received in the user equipment After section, the method also includes:

The user equipment plays i-th of media fragment that code rate is first code rate；

The i+1 media fragment that the code rate that the server is sent is first code rate is received in the user equipment Later, the method also includes:

The local cache of user equipment described in the user equipment access is searched in the local cache of the user equipment To code rate it is the i+1 media fragment of first code rate, and plays the i+1 media piece that code rate is first code rate Section.

In conjunction with second aspect and above-mentioned possible implementation, in the third possible implementation of the second aspect, The first code rate information is also carried in the first media transmission request, first code rate information is used to indicate the media piece of request The code rate of section is first code rate.

In conjunction with second aspect and above-mentioned possible implementation, in the fourth possible implementation of the second aspect, If 1≤i < N-1, the i+1 matchmaker that the code rate that the server is sent is first code rate is received in the user equipment After body segment, the method also includes:

The user equipment receives the i-th+2 media fragments that the code rate that the server is sent is first code rate.

In conjunction with second aspect and above-mentioned possible implementation, in a fifth possible implementation of the second aspect, The method also includes:

The local cache of user equipment described in the user equipment access is not looked into the local cache of the user equipment Find code rate be the second code rate j-th of media fragment, 1≤j≤N, j are positive integer, second code rate with described first yard Rate is different；

The user equipment sends the request of the second media transmission to the server, takes in the second media transmission request Second segment information of band and the second code rate information, the media fragment that second segment information is used to indicate request is the jth A media fragment, the code rate that second code rate information is used to indicate the media fragment of request is second code rate；

The user equipment receives j-th of media piece that the code rate that the server is sent is second code rate Section, and play j-th of media fragment that code rate is second code rate.

In conjunction with second aspect and above-mentioned possible implementation, in the sixth possible implementation of the second aspect, Before the user equipment sends the request of the first media transmission to server, the method also includes:

The user equipment is established hypertext transfer protocol http session with the server and is connect；

The user equipment sends push function to the server and enables message, and the push function enables message and is used for Indicate that the server sends the continuous media fragment of the same media stream file of same code rate to the user equipment.

The third aspect of the embodiment of the present invention provides a kind of media stream transmission method, comprising:

Hypertext transfer protocol dynamic self-adapting stream DASH agent entity receives the first media transmission that user equipment is sent It requests, carries first segment information in the first media transmission request, first segment information is used to indicate the matchmaker of request Body segment is i-th of media fragment of media stream file to be transmitted；

There is i-th of media fragment if the DASH agent entity is uncached, the DASH agent entity is to service Device sends the first media transmission request；

The DASH agent entity receives i-th of media piece that the code rate that the server is sent is the first code rate Section, and i-th of media fragment that code rate is first code rate is sent to the user equipment；

The DASH agent entity receives the i+1 media piece that the code rate that the server is sent is first code rate Section；

Wherein, the media stream file to be transmitted is divided into N number of continuous media fragment, and 1≤i < N, i, N are Positive integer.

In conjunction with the third aspect, in the first possible implementation of the third aspect, the first media transmission request In also carry the first code rate information, the code rate that first code rate information is used to indicate the media fragment of request is described first yard Rate.

In conjunction with the possible implementation of the first of the third aspect or the third aspect, second in the third aspect is possible In implementation, if 1≤i < N-1, receiving the code rate that the server is sent in the DASH agent entity is described first After the i+1 media fragment of code rate, the method also includes:

The DASH agent entity receives the i-th+2 media pieces that the code rate that the server is sent is first code rate Section.

In conjunction with the third aspect and above-mentioned possible implementation, in the third possible implementation of the third aspect, The method also includes:

The DASH agent entity receives the second media transmission request that the user equipment is sent, and second media pass Second segment information is carried in defeated request and the second code rate information, second segment information are used to indicate the media fragment of request For j-th of media fragment of the media stream file to be transmitted, 1≤j≤N, j are positive integer, and second code rate information is used It is the second code rate in the code rate of the media fragment of instruction request, second code rate is different from first code rate；

There is code rate for j-th of media fragment of second code rate if the DASH agent entity is uncached, institute It states DASH agent entity and sends the second media transmission request to the server；

The DASH agent entity receives j-th of media that the code rate that the server is sent is second code rate Segment, and j-th of media fragment that code rate is second code rate is sent to the user equipment.

In conjunction with the third aspect and above-mentioned possible implementation, in the fourth possible implementation of the third aspect, Before the first media transmission request that the DASH agent entity receives that user equipment is sent, the method also includes:

The DASH agent entity is established hypertext transfer protocol http session with the user equipment and is connect, the DASH Agent entity is established http session with the server and is connect；

The DASH agent entity sends push function to the server and enables message, and the push function enables message It is used to indicate the continuous media that the server sends the same media stream file of same code rate to the DASH agent entity Segment.

The fourth aspect of the embodiment of the present invention provides a kind of server, comprising:

Receiving unit, for receiving the first media transmission request of downstream node transmission, the first media transmission request First segment information of middle carrying, the media fragment that first segment information is used to indicate request is media stream file to be transmitted I-th of media fragment；

Transmission unit, for being requested according to first media transmission, it is first yard that Xiang Suoshu downstream node, which sends code rate, I-th of media fragment of rate；

The transmission unit is also used to send the i+1 media that code rate is first code rate to the downstream node Segment；

In conjunction with fourth aspect, in the first possible implementation of the fourth aspect, the server, further includes:

Processing unit determined for the first moment for the playing duration according to i-th of media fragment, when described first At the time of quarter to send the i+1 media fragment；

The transmission unit is specifically used for sending code rate to the downstream node at first moment being described first yard The i+1 media fragment of rate.

In conjunction with the possible implementation of the first of fourth aspect or fourth aspect, second in fourth aspect is possible In implementation, the processing unit, being also used to send code rate to the downstream node in the transmission unit is described first Before i-th of media fragment of code rate, first code rate is determined according to strategy predetermined.

In conjunction with the possible implementation of the first of fourth aspect or fourth aspect, the third in fourth aspect is possible In implementation, the first code rate information is also carried in the first media transmission request, first code rate information is used to indicate The code rate of the media fragment of request is first code rate；

The processing unit, being also used to send code rate to the downstream node in the transmission unit is first code rate I-th of media fragment before, first code rate is determined according to first code rate information.

In conjunction with fourth aspect and above-mentioned possible implementation, in the fourth possible implementation of the fourth aspect, If 1≤i < N-1, the transmission unit, be also used to the downstream node send code rate be first code rate i-th+ After 1 media fragment, Xiang Suoshu downstream node sends the i-th+2 media fragments that code rate is first code rate.

In conjunction with fourth aspect and above-mentioned possible implementation, in the 5th kind of possible implementation of fourth aspect, The receiving unit, is also used to receive the second media transmission request that the downstream node is sent, and second media transmission is asked Second segment information of middle carrying and the second code rate information are asked, second segment information is used to indicate the media fragment of request as institute J-th of media fragment of media stream file to be transmitted is stated, 1≤j≤N, j are positive integer, and second code rate information is for referring to The code rate for showing the media fragment of request is the second code rate, and second code rate is different from first code rate；

The transmission unit is also used to be requested according to second media transmission, and Xiang Suoshu downstream node sends code rate and is J-th of media fragment of second code rate.

In conjunction with fourth aspect and above-mentioned possible implementation, in the 6th kind of possible implementation of fourth aspect, The processing unit is also used to before the first media transmission request that the receiving unit receives that downstream node is sent, control The server is established hypertext transfer protocol http session with the downstream node and is connect；

The receiving unit is also used to receive the push function that the downstream node is sent and enables message, the push function Can enable message be used to indicate the server to the downstream node send same code rate same media stream file it is continuous Media fragment.

In conjunction with fourth aspect and above-mentioned possible implementation, in the 7th kind of possible implementation of fourth aspect, The downstream node is user equipment；Alternatively, the downstream node is hypertext transfer protocol dynamic self-adapting stream DASH agency Entity.

5th aspect of the embodiment of the present invention, provides a kind of user equipment, comprising:

Transmission unit carries in the first media transmission request for sending the request of the first media transmission to server First segment information, the media fragment that first segment information is used to indicate request is the i-th of media stream file to be transmitted A media fragment；

Receiving unit, for receiving i-th of media fragment that the code rate that the server is sent is the first code rate；

The receiving unit is also used to receive the i+1 matchmaker that the code rate that the server is sent is first code rate Body segment；

In conjunction with the 5th aspect, in the first possible implementation of the 5th aspect, the user equipment, further includes:

Processing unit is used for before the transmission unit sends the request of the first media transmission to server, described in access The local cache of user equipment, and i-th of media fragment is not found in the local cache of the user equipment.

In conjunction with the first possible implementation of the 5th aspect or the 5th aspect, second at the 5th aspect is possible In implementation, the user equipment, further includes:

Broadcast unit, for receiving described that the code rate that the server is sent is the first code rate in the receiving unit After i media fragment, i-th of media fragment that code rate is first code rate is played；

The processing unit, being also used to receive the code rate that the server is sent in the receiving unit is described first yard After the i+1 media fragment of rate, the local cache of the user equipment is accessed, and in the local cache of the user equipment In find code rate be first code rate i+1 media fragment；

The broadcast unit is also used to play the i+1 media fragment that code rate is first code rate.

In conjunction with the 5th aspect and above-mentioned possible implementation, in the third possible implementation of the 5th aspect, The first code rate information is also carried in the first media transmission request, first code rate information is used to indicate the media piece of request The code rate of section is first code rate.

In conjunction with the 5th aspect and above-mentioned possible implementation, in the 4th kind of possible implementation of the 5th aspect, If 1≤i < N-1, the receiving unit, it is also used in receive that the code rate that the server is sent is first code rate the After i+1 media fragment, the i-th+2 media fragments that the code rate that the server is sent is first code rate are received.

In conjunction with the 5th aspect and above-mentioned possible implementation, in the 5th kind of possible implementation of the 5th aspect, The processing unit is also used to access the local cache of the user equipment, and not in the local cache of the user equipment J-th of media fragment that code rate is the second code rate is found, 1≤j≤N, j are positive integer, second code rate and described first Code rate is different；

The transmission unit is also used to send the request of the second media transmission, second media transmission to the server Second segment information is carried in request and the second code rate information, the media fragment that second segment information is used to indicate request are J-th of media fragment, the code rate that second code rate information is used to indicate the media fragment of request is second code rate；

The receiving unit is also used to receive described j-th that the code rate that the server is sent is second code rate Media fragment；

The broadcast unit is also used to play j-th of media fragment that code rate is second code rate.

In conjunction with the 5th aspect and above-mentioned possible implementation, in the 6th kind of possible implementation of the 5th aspect, The processing unit is also used to before the transmission unit sends the request of the first media transmission to server, controls the use Family equipment is established hypertext transfer protocol http session with the server and is connect；

The transmission unit is also used to send the enabled message of push function to the server, and the push function is enabled Message is used to indicate the continuous media that the server sends the same media stream file of same code rate to the user equipment Segment.

It is real to provide a kind of hypertext transfer protocol dynamic self-adapting stream DASH agency for 6th aspect of the embodiment of the present invention Body, comprising:

Receiving unit, for receiving the first media transmission request of user equipment transmission, the first media transmission request First segment information of middle carrying, the media fragment that first segment information is used to indicate request is media stream file to be transmitted I-th of media fragment；

Transmission unit is sent out if having i-th of media fragment for the DASH agent entity to be uncached to server First media transmission is sent to request；

The receiving unit is also used to receive i-th of media that the code rate that the server is sent is the first code rate Segment；

The transmission unit is also used to send i-th of matchmaker that code rate is first code rate to the user equipment Body segment；

In conjunction with the 6th aspect, in the first possible implementation of the 6th aspect, the first media transmission request In also carry the first code rate information, the code rate that first code rate information is used to indicate the media fragment of request is described first yard Rate.

In conjunction with the first possible implementation of the 6th aspect or the 6th aspect, second at the 6th aspect is possible In implementation, the receiving unit is described receiving the code rate that the server is sent if being also used to 1≤i < N-1 After the i+1 media fragment of first code rate, the i-th+2 that the code rate that the server is sent is first code rate are received Media fragment.

In conjunction with the 6th aspect and above-mentioned possible implementation, in the third possible implementation of the 6th aspect, The receiving unit, is also used to receive the second media transmission request that the user equipment is sent, and second media transmission is asked Second segment information of middle carrying and the second code rate information are asked, second segment information is used to indicate the media fragment of request as institute J-th of media fragment of media stream file to be transmitted is stated, 1≤j≤N, j are positive integer, and second code rate information is for referring to The code rate for showing the media fragment of request is the second code rate, and second code rate is different from first code rate；

The transmission unit, if being also used to, the DASH agent entity is uncached to have code rate for the described of second code rate J-th of media fragment then sends the second media transmission request to the server；

The transmission unit is also used to send j-th of matchmaker that code rate is second code rate to the user equipment Body segment.

In conjunction with the 6th aspect and above-mentioned possible implementation, in the 4th kind of possible implementation of the 6th aspect, The DASH agent entity, further includes:

Processing unit, for controlling before the first media transmission request that the receiving unit receives that user equipment is sent It makes the DASH agent entity and establishes hypertext transfer protocol http session with the user equipment and connect, and control the DASH Agent entity is established http session with the server and is connect；

The transmission unit is also used to send the enabled message of push function to the server, and the push function is enabled Message be used to indicate the server to the DASH agent entity send same code rate same media stream file it is continuous Media fragment.

7th aspect of the embodiment of the present invention, provides a kind of server, comprising:

Receiver, the first media transmission for receiving downstream node transmission are requested, in the first media transmission request First segment information is carried, the media fragment that first segment information is used to indicate request is media stream file to be transmitted I-th of media fragment；

Transmitter, for being requested according to first media transmission, it is the first code rate that Xiang Suoshu downstream node, which sends code rate, I-th of media fragment；

The transmitter is also used to send the i+1 media piece that code rate is first code rate to the downstream node Section；

In conjunction with the 7th aspect, in the first possible implementation of the 7th aspect, the server, further includes:

Processor determines the first moment, first moment for the playing duration according to i-th of media fragment At the time of to send the i+1 media fragment；

The transmitter is specifically used for sending code rate to the downstream node at first moment being first code rate The i+1 media fragment.

In conjunction with the first possible implementation of the 7th aspect or the 7th aspect, second at the 7th aspect is possible In implementation, the processor, being also used to send code rate to the downstream node in the transmitter is first code rate I-th of media fragment before, first code rate is determined according to strategy predetermined.

In conjunction with the first possible implementation of the 7th aspect or the 7th aspect, the third at the 7th aspect is possible In implementation, the first code rate information is also carried in the first media transmission request, first code rate information is used to indicate The code rate of the media fragment of request is first code rate；

The processor is also used to send code rate to the downstream node in the transmitter as the institute of first code rate Before stating i-th of media fragment, first code rate is determined according to first code rate information.

In conjunction with the 7th aspect and above-mentioned possible implementation, in the 4th kind of possible implementation of the 7th aspect, If 1≤i < N-1, the transmitter, it is also used to sending the i+1 that code rate is first code rate to the downstream node After a media fragment, Xiang Suoshu downstream node sends the i-th+2 media fragments that code rate is first code rate.

In conjunction with the 7th aspect and above-mentioned possible implementation, in the 5th kind of possible implementation of the 7th aspect, The receiver is also used to receive the second media transmission request that the downstream node is sent, the second media transmission request Second segment information of middle carrying and the second code rate information, the media fragment that second segment information is used to indicate request is described J-th of media fragment of media stream file to be transmitted, 1≤j≤N, j are positive integer, and second code rate information is used to indicate The code rate of the media fragment of request is the second code rate, and second code rate is different from first code rate；

The transmitter is also used to be requested according to second media transmission, and it is institute that Xiang Suoshu downstream node, which sends code rate, State j-th of media fragment of the second code rate.

In conjunction with the 7th aspect and above-mentioned possible implementation, in the 6th kind of possible implementation of the 7th aspect, The processor is also used to before the first media transmission request that the receiver receives that downstream node is sent, described in control Server is established hypertext transfer protocol http session with the downstream node and is connect；

The receiver is also used to receive the push function that the downstream node is sent and enables message, the push function Enabled message be used to indicate the server to the downstream node send same code rate same media stream file it is continuous Media fragment.

In conjunction with the 7th aspect and above-mentioned possible implementation, in the 7th kind of possible implementation of the 7th aspect, The downstream node is user equipment；Alternatively, the downstream node is hypertext transfer protocol dynamic self-adapting stream DASH agency Entity.

The eighth aspect of the embodiment of the present invention provides a kind of user equipment, comprising:

Transmitter carries for sending the request of the first media transmission to server in first media transmission request A piece of segment information, the media fragment that first segment information is used to indicate request is i-th of media stream file to be transmitted Media fragment；

Receiver, for receiving i-th of media fragment that the code rate that the server is sent is the first code rate；

The receiver is also used to receive the i+1 media that the code rate that the server is sent is first code rate Segment；

In conjunction with eighth aspect, in the first possible implementation of eighth aspect, the user equipment, further includes:

Processor, for accessing the user before the transmitter sends the request of the first media transmission to server The local cache of equipment, and i-th of media fragment is not found in the local cache of the user equipment.

In conjunction with the possible implementation of the first of eighth aspect or eighth aspect, second in eighth aspect is possible In implementation, the user equipment, further includes:

Player, for receiving described i-th that the code rate that the server is sent is the first code rate in the receiver After media fragment, i-th of media fragment that code rate is first code rate is played；

The processor, being also used to receive the code rate that the server is sent in the receiver is first code rate After i+1 media fragment, the local cache of the user equipment is accessed, and look into the local cache of the user equipment Find the i+1 media fragment that code rate is first code rate；

The player is also used to play the i+1 media fragment that code rate is first code rate.

In conjunction with eighth aspect and above-mentioned possible implementation, in the third possible implementation of eighth aspect, The first code rate information is also carried in the first media transmission request, first code rate information is used to indicate the media piece of request The code rate of section is first code rate.

In conjunction with eighth aspect and above-mentioned possible implementation, in the 4th kind of possible implementation of eighth aspect, If 1≤i < N-1, the receiver, be also used to receive that the code rate that the server is sent is first code rate i-th+ After 1 media fragment, the i-th+2 media fragments that the code rate that the server is sent is first code rate are received.

In conjunction with eighth aspect and above-mentioned possible implementation, in the 5th kind of possible implementation of eighth aspect, The processor is also used to access the local cache of the user equipment, and does not look into the local cache of the user equipment Find code rate be the second code rate j-th of media fragment, 1≤j≤N, j are positive integer, second code rate with described first yard Rate is different；

The transmitter is also used to send the request of the second media transmission to the server, and second media transmission is asked Second segment information of middle carrying and the second code rate information are asked, second segment information is used to indicate the media fragment of request as institute J-th of media fragment is stated, the code rate that second code rate information is used to indicate the media fragment of request is second code rate；

The receiver is also used to receive j-th of matchmaker that the code rate that the server is sent is second code rate Body segment；

The player is also used to play j-th of media fragment that code rate is second code rate.

In conjunction with eighth aspect and above-mentioned possible implementation, in the 6th kind of possible implementation of eighth aspect, The processor is also used to before the transmitter sends the request of the first media transmission to server, controls the user and set It is standby to establish hypertext transfer protocol http session with the server and connect；

The transmitter is also used to send push function to the server and enables message, and the push function is enabled to disappear Breath is used to indicate the continuous media piece that the server sends the same media stream file of same code rate to the user equipment Section.

It is real to provide a kind of hypertext transfer protocol dynamic self-adapting stream DASH agency for 9th aspect of the embodiment of the present invention Body, comprising:

Receiver, the first media transmission for receiving user equipment transmission are requested, in the first media transmission request First segment information is carried, the media fragment that first segment information is used to indicate request is media stream file to be transmitted I-th of media fragment；

Transmitter is sent if having i-th of media fragment for the DASH agent entity to be uncached to server The first media transmission request；

The receiver is also used to receive i-th of media piece that the code rate that the server is sent is the first code rate Section；

The transmitter is also used to send i-th of media that code rate is first code rate to the user equipment Segment；

In conjunction with the 9th aspect, in the first possible implementation of the 9th aspect, the first media transmission request In also carry the first code rate information, the code rate that first code rate information is used to indicate the media fragment of request is described first yard Rate.

In conjunction with the first possible implementation of the 9th aspect or the 9th aspect, second at the 9th aspect is possible In implementation, the receiver is described the receiving the code rate that the server is sent if being also used to 1≤i < N-1 After the i+1 media fragment of one code rate, the i-th+2 matchmakers that the code rate that the server is sent is first code rate are received Body segment.

In conjunction with the 9th aspect and above-mentioned possible implementation, in the third possible implementation of the 9th aspect, The receiver is also used to receive the second media transmission request that the user equipment is sent, the second media transmission request Second segment information of middle carrying and the second code rate information, the media fragment that second segment information is used to indicate request is described J-th of media fragment of media stream file to be transmitted, 1≤j≤N, j are positive integer, and second code rate information is used to indicate The code rate of the media fragment of request is the second code rate, and second code rate is different from first code rate；

The transmitter, if being also used to the DASH agent entity, uncached to have code rate be described the of second code rate J media fragment then sends the second media transmission request to the server；

The transmitter is also used to send j-th of media that code rate is second code rate to the user equipment Segment.

In conjunction with the 9th aspect and above-mentioned possible implementation, in the 4th kind of possible implementation of the 9th aspect, The DASH agent entity, further includes:

Processor, for controlling institute before the first media transmission request that the receiver receives that user equipment is sent It states DASH agent entity and establishes hypertext transfer protocol http session with the user equipment and connect, and control the DASH agency Entity is established http session with the server and is connect；

The transmitter is also used to send push function to the server and enables message, and the push function is enabled to disappear Breath is used to indicate the continuous matchmaker that the server sends the same media stream file of same code rate to the DASH agent entity Body segment.

Media stream transmission method and device provided in an embodiment of the present invention, since server is asked according to the first media transmission It asks, after sending i-th of media fragment that code rate is the first code rate to downstream node, sending code rate to downstream node is first yard The i+1 media fragment of rate, without waiting the request of downstream node, it is thereby possible to reduce downstream node in the prior art The waiting time delay during the i+1 media fragment that code rate is the first code rate is obtained, downstream node can be improved and obtain matchmaker The real-time of body stream file.Further, since the method that the embodiment of the present invention uses server active transmission, does not need downstream node Request is repeatedly sent, compared with request in the prior art-response message interaction mode, the signaling between equipment can be mitigated Burden.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art To obtain other drawings based on these drawings.

Fig. 1 is a kind of flow chart of media stream transmission method provided in an embodiment of the present invention；

Fig. 2 is the flow chart of another media stream transmission method provided in an embodiment of the present invention；

Fig. 3 is the flow chart of another media stream transmission method provided in an embodiment of the present invention；

Fig. 4 is the flow chart of another media stream transmission method provided in an embodiment of the present invention；

Fig. 5 is the flow chart of another media stream transmission method provided in an embodiment of the present invention；

Fig. 6 is a kind of composition schematic diagram of server provided in an embodiment of the present invention；

Fig. 7 is the composition schematic diagram of another server provided in an embodiment of the present invention；

Fig. 8 is a kind of composition schematic diagram of user equipment provided in an embodiment of the present invention；

Fig. 9 is the composition schematic diagram of another user equipment provided in an embodiment of the present invention；

Figure 10 is the composition schematic diagram of another user equipment provided in an embodiment of the present invention；

Figure 11 is a kind of composition schematic diagram of DASH agent entity provided in an embodiment of the present invention；

Figure 12 is the composition schematic diagram of another kind DASH agent entity provided in an embodiment of the present invention；

Figure 13 is the composition schematic diagram of another server provided in an embodiment of the present invention；

Figure 14 is the composition schematic diagram of another server provided in an embodiment of the present invention；

Figure 15 is the composition schematic diagram of another user equipment provided in an embodiment of the present invention；

Figure 16 is the composition schematic diagram of another user equipment provided in an embodiment of the present invention；

Figure 17 is the composition schematic diagram of another user equipment provided in an embodiment of the present invention；

Figure 18 is the composition schematic diagram of another kind DASH agent entity provided in an embodiment of the present invention；

Figure 19 is the composition schematic diagram of another kind DASH agent entity provided in an embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

The embodiment of the present invention is applied in DASH technology, using DASH technology, media stream file to be transmitted (including video File and audio file etc.) multiple continuous media fragments are divided into, for each media fragment, server provides multiple The version of different code rates is selected for user equipment.

Server herein, for be stored with media stream file to be transmitted all media fragments server.

User equipment herein, can for mobile phone, personal computer (English: personal computer, abbreviation: PC), laptop, tablet computer etc..

The present embodiment is the angle from server, is said to a kind of media stream transmission method provided in an embodiment of the present invention It is bright.As shown in Figure 1, media stream transmission method provided in an embodiment of the present invention includes:

S101, server receive the first media transmission request that downstream node is sent.

Wherein, downstream node is specially the downstream for being located at server, and has the network node of caching capabilities.Downstream node It can be user equipment, alternatively, downstream node can be DASH agent entity.

First segment information is carried in the request of first media transmission, first segment information is used to indicate the media fragment of request For i-th of media fragment of media stream file to be transmitted, media stream file to be transmitted is divided into N number of continuous media piece Section, 1≤i < N, i and N are positive integer.Media stream file to be transmitted can be video file or audio file etc..

Illustratively, it is assumed that media stream file to be transmitted is the video file that a playing duration is 1 minute.By every 6 Second video pictures as a media fragment, which can be divided into 10 continuous, playing duration is 6 seconds Media fragment, i.e. the 1st media fragment includes the 0th second to the 6th second video pictures of the video file, the 2nd media piece Section includes the 6th second to the 12nd second video pictures of the video file, and the 3rd media fragment includes the 12nd second of the video file To the 18th second video pictures etc..It is of course also possible to which it is unequal N number of continuous that the video file is divided into playing duration Media file, as long as the content of the video pictures of this N number of media fragment is continuous, it is not limited in the embodiment of the present invention.

S102, server are requested according to the first media transmission, send i-th of matchmaker that code rate is the first code rate to downstream node Body segment.

Wherein, the first code rate is what server determined, and server can determine the first code rate according to strategy predetermined, The first code rate can also be determined using other modes, the embodiment of the present invention is here to determining the mode of the first code rate without limitation. Strategy predetermined include: server current load situation and the corresponding relationship of code rate, current network congestion with Pair of the corresponding relationship of code rate, user type (e.g., Gold Subscriber, Silver Subscriber, Bronze Subscriber etc.) and code rate of user equipment It should be related to, the embodiment of the present invention is here not specifically limited strategy predetermined.

S103, server send the i+1 media fragment that code rate is the first code rate to downstream node.

Wherein, i+1 media fragment is and the continuous media fragment of i-th of media fragment.

Under normal circumstances, the code rate of the media fragment for the media stream file transmitted within a certain period of time remains unchanged, therefore, The code rate for the i+1 media fragment that server is sent to downstream node is identical as the code rate of i-th of media fragment, is first Code rate.

Illustratively, it is assumed that i 1, the first code rate are 500kbps (kilobit is per second), then server is sent to downstream node After code rate is the 1st media fragment of 500kbps, the 2nd media piece that code rate is 500kbps is also sent to downstream node Section.Certainly, after the 2nd media fragment that server sends that code rate is 500kbps to downstream node, server can also be after The continuous code rate that sends to downstream node is the 3rd media fragment of 500kbps, the 4th media fragment etc..

Media stream transmission method provided in an embodiment of the present invention, since server is requested according to the first media transmission, to After downstream node sends i-th of media fragment that code rate is the first code rate, sending code rate to downstream node is the first code rate I+1 media fragment, without waiting the request of downstream node, it is thereby possible to reduce downstream node obtains in the prior art Code rate is the waiting time delay during the i+1 media fragment of the first code rate, and downstream node can be improved and obtain Media Stream The real-time of file.Further, since the method that the embodiment of the present invention uses server active transmission, it is multiple not need downstream node Request is sent, compared with request in the prior art-response message interaction mode, the signaling that can mitigate between equipment is negative Load.

The present embodiment is from the angle of user equipment, to a kind of media stream transmission method progress provided in an embodiment of the present invention Explanation.As shown in Fig. 2, media stream transmission method provided in an embodiment of the present invention includes:

S201, user equipment send the request of the first media transmission to server.

Wherein, first segment information is carried in the request of the first media transmission, first segment information is used to indicate the matchmaker of request Body segment is i-th of media fragment of media stream file to be transmitted.Media stream file to be transmitted is divided into N number of continuous Media fragment, 1≤i < N, i and N are positive integer.

S202, user equipment receive i-th of media fragment that the code rate that server is sent is the first code rate.

S203, user equipment receive the i+1 media fragment that the code rate that server is sent is the first code rate.

Media stream transmission method provided in an embodiment of the present invention is the since user equipment receives the code rate that server is sent It after i-th of media fragment of one code rate, no longer needs to request to server, the code rate that can receive server transmission is first The i+1 media fragment of code rate, it is thereby possible to reduce in the prior art user equipment obtain code rate be the first code rate i-th+ The real-time that user equipment obtains media stream file can be improved in waiting time delay during 1 media fragment.In addition, by In the method that the embodiment of the present invention uses server active transmission, does not need user equipment and repeatedly send request, with the prior art In request-response message interaction mode compare, the signaling burden between equipment can be mitigated.

The present embodiment is from the angle of DASH agent entity, to a kind of media stream transmission method provided in an embodiment of the present invention It is illustrated.As shown in figure 3, media stream transmission method provided in an embodiment of the present invention includes:

S301, DASH agent entity receive the first media transmission request that user equipment is sent.

There is i-th of media fragment if S302, DASH agent entity is uncached, DASH agent entity sends the to server The request of one media transmission.

Wherein, if DASH agent entity is not in advance to requested i-th of the media fragment of server, DASH agent entity is not I-th of media fragment can be cached with.

S303, DASH agent entity receive server send code rate be the first code rate i-th of media fragment, and to Family equipment sends i-th of media fragment that code rate is the first code rate.

S304, DASH agent entity receive the i+1 media fragment that the code rate that server is sent is the first code rate.

Wherein, DASH agent entity receive server send code rate be the first code rate i-th of media fragment after, Without being the i+1 media fragment of the first code rate to server request code rate, can receive the code rate that server is sent is The i+1 media fragment of first code rate.When user equipment requests code rate is the i+1 media fragment of the first code rate, DASH agent entity caches the i+1 media fragment that code rate is the first code rate, and therefore, DASH agent entity can To send the i+1 media fragment that code rate is the first code rate to user equipment.

Media stream transmission method provided in an embodiment of the present invention, since DASH agent entity receives the code rate that server is sent It after i-th of media fragment of the first code rate, no longer needs to request to server, the code rate that can receive server transmission is The i+1 media fragment of first code rate, it is thereby possible to reduce it is first yard that DASH agent entity, which obtains code rate, in the prior art Waiting time delay during the i+1 media fragment of rate.When user equipment needs to obtain the i+1 that code rate is the first code rate When a media fragment, since DASH agent entity has cached the i+1 media fragment that code rate is the first code rate, user Waiting time delay during equipment obtains the i+1 media fragment that code rate is the first code rate is also reduced, so as to mention High user equipment obtains the real-time of media stream file.Further, since the embodiment of the present invention uses the side of server active transmission Method does not need DASH agent entity and repeatedly sends request, compared with request in the prior art-response message interaction mode, The signaling burden between equipment can be mitigated.

The present embodiment is the angle interacted from server and user equipment, to a kind of matchmaker provided in an embodiment of the present invention Body spreads transmission method and is illustrated.As shown in figure 4, media stream transmission method provided in an embodiment of the present invention includes:

S401, server and user equipment establish hypertext transfer protocol (English: HyperText Transfer Protocol, abbreviation: HTTP) session connection.

Wherein, the particular content of http session can refer to associated description in the prior art, and the embodiment of the present invention is here It repeats no more.

S402, user equipment send push function to server and enable message.

Wherein, push (PUSH) function enables message and is used to indicate server to the same of user equipment transmission same code rate The media transmission request message that the continuous media fragment of media stream file, i.e. server are sent without waiting for user equipment, directly Connect the continuous media fragment of the same media stream file to user equipment active transmission same code rate.

Illustratively, the format that push function enables message can be with are as follows:

SETTINGS_ENABLE_PUSH=1.

S403, server send media exhibition description (English: Media Presentation to user equipment Description, abbreviation: MPD) file.

Wherein, MPD file is used to indicate the storage format of each media fragment of media stream file to be transmitted.When with After family equipment obtains MPD file, user equipment can according to need to server and request media fragment.MPD file is specifically retouched Stating can be with reference to associated description in the prior art, and which is not described herein again for the embodiment of the present invention.

The local cache of S404, user equipment access user equipment do not find i-th in the local cache of user equipment A media fragment.

Wherein, media stream file to be transmitted is divided into N number of continuous media fragment, and 1≤i < N, i and N are positive whole Number.If not having i-th of media fragment in the local cache of user equipment, user equipment needs to request i-th of matchmaker to server Body segment.

S405, user equipment send the request of the first media transmission to server.

Wherein, first segment information is carried in the request of the first media transmission, first segment information is used to indicate the matchmaker of request Body segment is i-th of media fragment of media stream file to be transmitted.

Specifically, first segment information can be the mark of i-th of media fragment, indicated with ID.In 2.0 agreement of HTTP, If i-th media fragment is identified as ID, i+1 media fragment is identified as ID+2, the mark of i+1 media fragment For ID+4.

S406, server are requested according to the first media transmission, send i-th of matchmaker that code rate is the first code rate to user equipment Body segment.

Further, in the first situation of the embodiment of the present invention, server determines the according to strategy predetermined One code rate, and i-th of media fragment that code rate is the first code rate is sent to user equipment.Strategy predetermined includes: service Current load situation and the corresponding relationship of code rate, the corresponding relationship of current network congestion and code rate, the user equipment of device User type (e.g., Gold Subscriber, Silver Subscriber, Bronze Subscriber etc.) and code rate corresponding relationship etc., the embodiment of the present invention this In strategy predetermined is not specifically limited.

Further, in the second case of the embodiment of the present invention, first yard is also carried in the request of the first media transmission Rate information, the code rate that the first code rate information is used to indicate the media fragment of request is the first code rate.Server is according to the first code rate Information determines the first code rate, and sends i-th of media fragment that code rate is the first code rate to user equipment.

S407, user equipment play i-th of media fragment that code rate is the first code rate.

S408, server send the i+1 media fragment that code rate is the first code rate to user equipment.

Specifically, S408 may include: S408a and S408b.

S408a, server determined for the first moment according to the playing duration of i-th of media fragment, and the first moment was to send the At the time of i+1 media fragment.

Wherein, the first moment can be at the time of playing earlier than or equal to i-th of media fragment.For example, i-th of media The playing duration of segment is 6 seconds, if the 1st point of server sends i-th of media piece that code rate is the first code rate to user equipment in 0 second Section, do not consider the transmission time of i-th of media fragment, then server can determine the first moment be the 1st point 6 seconds 0 second to the 1st point Between any moment.

S408b, server send the i+1 media fragment that code rate is the first code rate to user equipment at the first moment.

The local cache of S409, user equipment access user equipment find code rate in the local cache of user equipment For the i+1 media fragment of the first code rate, and play the i+1 media fragment that code rate is the first code rate.

S410, server send the i-th+2 media fragments that code rate is the first code rate to user equipment.

Wherein, when 1≤i < N-1, S410 is likely to execute.When i=N-1, S410 is not executed.

The local cache of S411, user equipment access user equipment do not find code in the local cache of user equipment Rate is j-th of media fragment of the second code rate.

Wherein, 1≤j≤N, j are positive integer, and the second code rate is different from the first code rate.

For example, the first code rate is 500kbps, the second code rate is 1000kbps.When user equipment receives several code rates After the media fragment of 500kbps, if detect current Network status preferably (such as: the matter of the wireless channel of user equipment Measure it is more excellent), then can request server send code rate be 1000kbps media fragment, to obtain better user experience.

S412, user equipment send the request of the second media transmission to server.

Wherein, second segment information and the second code rate information are carried in the request of the second media transmission, second segment information is used It is j-th of media fragment in the media fragment of instruction request, the second code rate information is used to indicate the code rate of the media fragment of request For the second code rate.

S413, server are requested according to the second media transmission, send j-th of matchmaker that code rate is the second code rate to user equipment Body segment.

Wherein, when server receives the request of the second media transmission, if there are still the media pieces that code rate is the first code rate Section is being transmitted, then server terminates the transmission for the media fragment that the code rate is the first code rate.

S414, user equipment play j-th of media fragment that code rate is the second code rate.

It should be noted that it is the more of the first code rate that server can also send code rate to user equipment after S410 A continuous media fragment；After S413, server can also send multiple companies that code rate is the second code rate to user equipment Continuous media fragment is merely illustrative of in the embodiment of the present invention, and Limited service device does not push continuous to user equipment The number of media fragment.

Media stream transmission method provided in an embodiment of the present invention, since server is requested according to the first media transmission, to After user equipment sends i-th of media fragment that code rate is the first code rate, sending code rate to user equipment is the first code rate I+1 media fragment, without waiting the request of user equipment, it is thereby possible to reduce user equipment obtains in the prior art Code rate is the waiting time delay during the i+1 media fragment of the first code rate, and user equipment can be improved and obtain Media Stream The real-time of file.If the code rate of user equipment requests changes, using the method for the embodiment of the present invention, server can be to User equipment sends the media fragment that code rate is new code rate (code rate after variation, i.e., the second code rate in the present embodiment).In addition, Due to the method that the embodiment of the present invention uses server active transmission, does not need user equipment and repeatedly sends media transmission request, Compared with request in the prior art-response message interaction mode, the signaling burden between equipment can be mitigated.

The present embodiment is the angle interacted from server, DASH agent entity and user equipment, to of the invention real A kind of media stream transmission method for applying example offer is illustrated.As shown in figure 5, media flow transmission side provided in an embodiment of the present invention Method includes:

S501, server and DASH agent entity establish http session connection, and DASH agent entity and user equipment are established Http session connection.

S502, DASH agent entity send push function to server and enable message.

Wherein, push function enables message and is used to indicate the same matchmaker that server sends same code rate to DASH agent entity The media transmission request message that the continuous media fragment of body stream file, i.e. server are sent without waiting for DASH agent entity, Directly to the continuous media fragment of the same media stream file of DASH agent entity active transmission same code rate.

S503, server send MPD file to DASH agent entity.

S504, DASH agent entity send MPD file to user equipment.

The local cache of S505, user equipment access user equipment do not find i-th in the local cache of user equipment A media fragment.

S506, user equipment send the request of the first media transmission to DASH agent entity.

There is i-th of media fragment if S507, DASH agent entity is uncached, DASH agent entity sends the to server The request of one media transmission.

S508, server are requested according to the first media transmission, send i-th that code rate is the first code rate to DASH agent entity A media fragment.

Further, in the first situation of the embodiment of the present invention, server determines the according to strategy predetermined One code rate, and i-th of media fragment that code rate is the first code rate is sent to DASH agent entity.

Further, in the second case of the embodiment of the present invention, first yard is also carried in the request of the first media transmission Rate information, the code rate that the first code rate information is used to indicate the media fragment of request is the first code rate.Server is according to the first code rate Information determines the first code rate, and sends i-th of media fragment that code rate is the first code rate to DASH agent entity.

S509, DASH agent entity send i-th of media fragment that code rate is the first code rate to user equipment.

S510, user equipment play i-th of media fragment that code rate is the first code rate.

S511, server send the i+1 media fragment that code rate is the first code rate to DASH agent entity.

Specifically, S511 may include: S511a and S511b.

S511a, server determined for the first moment according to the playing duration of i-th of media fragment, and the first moment was to send the At the time of i+1 media fragment.

Wherein, the first moment can be at the time of playing earlier than or equal to i-th of media fragment.For example, i-th of media The playing duration of segment is 6 seconds, if the 1st point of server sends i-th of matchmaker that code rate is the first code rate to DASH agent entity in 0 second Body segment does not consider the transmission time of i-th of media fragment, then server can determine the first moment be the 1st point 0 second to the 1st Divide any moment between 6 seconds.

S511b, server send the i+1 media piece that code rate is the first code rate to DASH agent entity at the first moment Section.

It is the i+1 media fragment of the first code rate that S512, user equipment, which request code rate to DASH agent entity,.

S513, DASH agent entity send the i+1 media fragment that code rate is the first code rate to user equipment.

Since server sends the i+1 media fragment that code rate is the first code rate to DASH agent entity in advance, Therefore, when user equipment to DASH agent entity request code rate be the first code rate i+1 media fragment when, DASH agency reality Body can send the i+1 media fragment that the code rate cached is the first code rate to user equipment, reduce in the prior art User equipment obtains the waiting time delay during the i+1 media fragment that code rate is the first code rate.

S514, user equipment play the i+1 media fragment that code rate is the first code rate.

S515, server send the i-th+2 media fragments that code rate is the first code rate to DASH agent entity.

The local cache of S516, user equipment access user equipment do not find code in the local cache of user equipment Rate is j-th of media fragment of the second code rate.

S517, user equipment send the request of the second media transmission to DASH agent entity.

There is code rate for j-th of media fragment of the second code rate if S518, DASH agent entity are uncached, DASH agency is real Body sends the request of the second media transmission to server.

S519, server are requested according to the second media transmission, send the jth that code rate is the second code rate to DASH agent entity A media fragment.

S520, DASH agent entity send j-th of media fragment that code rate is the second code rate to user equipment.

S521, user equipment play j-th of media fragment that code rate is the second code rate.

It should be noted that it is the first code rate that server can also send code rate to DASH agent entity after S515 Multiple continuous media fragments；After S519, it is the second code rate that server can also send code rate to DASH agent entity Multiple continuous media fragments, be merely illustrative of in the embodiment of the present invention, Limited service device is not to DASH agent entity The number of the continuous media fragment sent.

Media stream transmission method provided in an embodiment of the present invention, since DASH server is sent to DASH agent entity in advance Code rate is the i+1 media fragment of the first code rate, and therefore, requesting code rate to DASH agent entity when user equipment is first yard When the i+1 media fragment of rate, it is the first code rate that DASH agent entity can send the code rate cached to user equipment I+1 media fragment reduces the i+1 media fragment that user equipment acquisition code rate in the prior art is the first code rate The real-time that user equipment obtains media stream file can be improved in waiting time delay in the process.Further, since the embodiment of the present invention It using the method for server active transmission, does not need DASH agent entity and repeatedly sends media transmission request, and in the prior art Request-response message interaction mode compare, the signaling burden between equipment can be mitigated.

The embodiment of the present invention provides a kind of server, as shown in Figure 6, comprising: receiving unit 61 and transmission unit 62.

Receiving unit 61, the first media transmission for receiving downstream node transmission is requested, in the request of the first media transmission First segment information is carried, the media fragment that first segment information is used to indicate request is the i-th of media stream file to be transmitted A media fragment.

Transmission unit 62 sends i-th that code rate is the first code rate for requesting according to the first media transmission to downstream node A media fragment.

Transmission unit 62 is also used to send the i+1 media fragment that code rate is the first code rate to downstream node.

Wherein, media stream file to be transmitted is divided into N number of continuous media fragment, and 1≤i < N, i and N are positive whole Number.

Further, as shown in fig. 7, server in the embodiment of the present invention further include: processing unit 63.

Processing unit 63 determines that the first moment, the first moment are hair for the playing duration according to i-th of media fragment At the time of sending i+1 media fragment.

Transmission unit 62, specifically for sending the i+1 matchmaker that code rate is the first code rate to downstream node at the first moment Body segment.

Optionally, processing unit 63 are also used to send i-th that code rate is the first code rate to downstream node in transmission unit 62 Before a media fragment, the first code rate is determined according to strategy predetermined.

Optionally, the first code rate information is also carried in the request of the first media transmission, the first code rate information is used to indicate request Media fragment code rate be the first code rate.

Processing unit 63 is also used to send i-th of media that code rate is the first code rate to downstream node in transmission unit 62 Before segment, the first code rate is determined according to the first code rate information.

Further, it if 1≤i < N-1, transmission unit 62, is also used to sending code rate to downstream node be first yard After the i+1 media fragment of rate, the i-th+2 media fragments that code rate is the first code rate are sent to downstream node.

Further, receiving unit 61 are also used to receive the second media transmission request of downstream node transmission, the second media Second segment information is carried in transmission request and the second code rate information, the media fragment that second segment information is used to indicate request are J-th of media fragment of media stream file to be transmitted, 1≤j≤N, j are positive integer, and the second code rate information is used to indicate request The code rate of media fragment be the second code rate, the second code rate is different from the first code rate.

Transmission unit 62, is also used to be requested according to the second media transmission, and sending code rate to downstream node is the second code rate J-th of media fragment.

Further, processing unit 63 are also used to receive the first media transmission that downstream node is sent in receiving unit 61 Before request, control server is established http session with downstream node and is connect.

Receiving unit 61, the push function for being also used to receive downstream node transmission enable message, and push function enables message It is used to indicate the continuous media fragment that server sends the same media stream file of same code rate to downstream node.

Optionally, downstream node is user equipment；Alternatively, downstream node is DASH agent entity.

It should be noted that the specific descriptions of part functional module can refer in server provided in an embodiment of the present invention Corresponding content in embodiment of the method, the present embodiment are no longer described in detail here.

Server provided in an embodiment of the present invention, since server is requested according to the first media transmission, to downstream node After sending i-th of media fragment that code rate is the first code rate, the i+1 matchmaker that code rate is the first code rate is sent to downstream node Body segment, without waiting the request of downstream node, it is thereby possible to reduce it is first that downstream node, which obtains code rate, in the prior art Waiting time delay during the i+1 media fragment of code rate can be improved downstream node and obtain the real-time of media stream file Property.Further, since the method that the embodiment of the present invention uses server active transmission, does not need downstream node and repeatedly sends request, Compared with request in the prior art-response message interaction mode, the signaling burden between equipment can be mitigated.

The embodiment of the present invention also provides a kind of user equipment, as shown in Figure 8, comprising: transmission unit 71 and receiving unit 72.

Transmission unit 71 carries the in the request of the first media transmission for sending the request of the first media transmission to server A piece of segment information, the media fragment that first segment information is used to indicate request is i-th of media of media stream file to be transmitted Segment.

Receiving unit 72, the code rate for receiving server transmission are i-th of media fragment of the first code rate.

Receiving unit 72, the code rate for being also used to receive server transmission is the i+1 media fragment of the first code rate.

Further, as shown in figure 9, user equipment in the embodiment of the present invention further include: processing unit 73.

Processing unit 73, for accessing user before transmission unit 71 sends the request of the first media transmission to server The local cache of equipment, and i-th of media fragment is not found in the local cache of user equipment.

Further, as shown in Figure 10, the user equipment in the embodiment of the present invention further include: broadcast unit 74.

Broadcast unit 74, for receiving i-th of media that the code rate that server is sent is the first code rate in receiving unit 72 After segment, i-th of media fragment that code rate is the first code rate is played.

Processing unit 73 is also used to receive the i+1 that the code rate that server is sent is the first code rate in receiving unit 72 After media fragment, the local cache of user equipment is accessed, and finding code rate in the local cache of user equipment is first The i+1 media fragment of code rate.

Broadcast unit 74 is also used to play the i+1 media fragment that code rate is the first code rate.

Further, the first code rate information is also carried in the request of the first media transmission, the first code rate information, which is used to indicate, asks The code rate for the media fragment asked is the first code rate.

Further, it if 1≤i < N-1, receiving unit 72, is also used to receiving the code rate that server is sent be first After the i+1 media fragment of code rate, the i-th+2 media fragments that the code rate that server is sent is the first code rate are received.

Further, processing unit 73 are also used to access the local cache of user equipment, and not in the local of user equipment J-th of media fragment that code rate is the second code rate is found in caching, 1≤j≤N, j are positive integer, the second code rate and first yard Rate is different.

Transmission unit 71 is also used to send the request of the second media transmission to server, carries in the request of the second media transmission Second segment information and the second code rate information, the media fragment that second segment information is used to indicate request is j-th of media fragment, The code rate that second code rate information is used to indicate the media fragment of request is the second code rate.

Receiving unit 72, the code rate for being also used to receive server transmission is j-th of media fragment of the second code rate.

Broadcast unit 74 is also used to play j-th of media fragment that code rate is the second code rate.

Further, processing unit 73 are also used to send the first media transmission to server in transmission unit 71 and request it Before, control user equipment is established http session with server and is connect.

Transmission unit 71 is also used to send push function to server and enables message, and push function enables message for referring to Show that server sends the continuous media fragment of the same media stream file of same code rate to user equipment.

It should be noted that the specific descriptions of part functional module can join in user equipment provided in an embodiment of the present invention Corresponding content in test method embodiment, the present embodiment are no longer described in detail here.

User equipment provided in an embodiment of the present invention is the first code rate since user equipment receives the code rate that server is sent I-th of media fragment after, no longer need to request to server, the code rate that can receive server transmission is first code rate I+1 media fragment, it is thereby possible to reduce user equipment obtains the i+1 matchmaker that code rate is the first code rate in the prior art The real-time that user equipment obtains media stream file can be improved in waiting time delay during body segment.Further, since this hair The method that bright embodiment uses server active transmission, does not need user equipment and repeatedly sends request, ask in the prior art Ask-response message interaction mode compare, the signaling burden between equipment can be mitigated.

The embodiment of the present invention also provides a kind of DASH agent entity, as shown in figure 11, comprising: receiving unit 81 and transmission are single Member 82.

Receiving unit 81, the first media transmission for receiving user equipment transmission is requested, in the request of the first media transmission First segment information is carried, the media fragment that first segment information is used to indicate request is the i-th of media stream file to be transmitted A media fragment.

Transmission unit 82 sends first to server if having i-th of media fragment for DASH agent entity to be uncached Media transmission request.

Receiving unit 81, the code rate for being also used to receive server transmission is i-th of media fragment of the first code rate.

Transmission unit 82 is also used to send i-th of media fragment that code rate is the first code rate to user equipment.

Receiving unit 81, the code rate for being also used to receive server transmission is the i+1 media fragment of the first code rate.

Wherein, media stream file to be transmitted is divided into N number of continuous media fragment, and 1≤i < N, i, N are positive whole Number.

Further, receiving unit 81 are first receiving the code rate that server is sent if being also used to 1≤i < N-1 After the i+1 media fragment of code rate, the i-th+2 media fragments that the code rate that server is sent is the first code rate are received.

Further, receiving unit 81 are also used to receive the second media transmission request of user equipment transmission, the second media Second segment information is carried in transmission request and the second code rate information, the media fragment that second segment information is used to indicate request are J-th of media fragment of media stream file to be transmitted, 1≤j≤N, j are positive integer, and the second code rate information is used to indicate request The code rate of media fragment be the second code rate, the second code rate is different from the first code rate.

Transmission unit 82, if being also used to uncached j-th of the media fragment for having code rate for the second code rate of DASH agent entity, Then the request of the second media transmission is sent to server.

Receiving unit 81, the code rate for being also used to receive server transmission is j-th of media fragment of the second code rate.

Transmission unit 82 is also used to send j-th of media fragment that code rate is the second code rate to user equipment.

Further, as shown in figure 12, the DASH agent entity in the embodiment of the present invention further include: processing unit 83.

Processing unit 83, for controlling before the first media transmission request that receiving unit 81 receives that user equipment is sent DASH agent entity processed is established http session with user equipment and is connect, and controls DASH agent entity and establish HTTP meeting with server Words connection.

Transmission unit 82 is also used to send push function to server and enables message, and push function enables message for referring to Show that server sends the continuous media fragment of the same media stream file of same code rate to DASH agent entity.

It should be noted that the specific descriptions of part functional module can in DASH agent entity provided in an embodiment of the present invention With with reference to the corresponding content in embodiment of the method, the present embodiment is no longer described in detail here.

DASH agent entity provided in an embodiment of the present invention, since the code rate that DASH agent entity receives server transmission is It after i-th of media fragment of the first code rate, no longer needs to request to server, the code rate that can receive server transmission is the The i+1 media fragment of one code rate, it is thereby possible to reduce it is the first code rate that DASH agent entity, which obtains code rate, in the prior art I+1 media fragment during waiting time delay.When user equipment needs to obtain the i+1 that code rate is the first code rate When media fragment, since DASH agent entity has cached the i+1 media fragment that code rate is the first code rate, Yong Hushe Standby acquisition code rate is that the waiting time delay during the i+1 media fragment of the first code rate is also reduced, so as to improve The real-time of user equipment acquisition media stream file.Further, since the method that the embodiment of the present invention uses server active transmission, It does not need DASH agent entity and repeatedly sends request, it, can be with compared with the mode of request in the prior art-response message interaction Mitigate the signaling burden between equipment.

The embodiment of the present invention also provides a kind of server, as shown in figure 13, comprising: receiver 91 and transmitter 92.

Receiver 91 is taken in the request of the first media transmission for receiving the first media transmission request of downstream node transmission First segment information of band, the media fragment that first segment information is used to indicate request is i-th of media stream file to be transmitted Media fragment.

Transmitter 92 sends i-th that code rate is the first code rate for requesting according to the first media transmission to downstream node Media fragment.

Transmitter 92 is also used to send the i+1 media fragment that code rate is the first code rate to downstream node.

Further, as shown in figure 14, the server in the embodiment of the present invention further include: processor 93.

Processor 93 determines that the first moment, the first moment are to send for the playing duration according to i-th of media fragment At the time of i+1 media fragment.

Transmitter 92, specifically for sending the i+1 media that code rate is the first code rate to downstream node at the first moment Segment.

Optionally, processor 93 are also used to send i-th of matchmaker that code rate is the first code rate to downstream node in transmitter 92 Before body segment, the first code rate is determined according to strategy predetermined.

Processor 93 is also used to send i-th of media fragment that code rate is the first code rate to downstream node in transmitter 92 Before, the first code rate is determined according to the first code rate information.

Further, it if 1≤i < N-1, transmitter 92, is also used to sending code rate to downstream node be the first code rate I+1 media fragment after, to downstream node send code rate be the first code rate the i-th+2 media fragments.

Further, receiver 91, are also used to receive the second media transmission request of downstream node transmission, and the second media pass Carry second segment information and the second code rate information in defeated request, second segment information be used to indicate request media fragment be to J-th of media fragment of the media stream file of transmission, 1≤j≤N, j are positive integer, and the second code rate information is used to indicate request The code rate of media fragment is the second code rate, and the second code rate is different from the first code rate.

Transmitter 92, is also used to be requested according to the second media transmission, sends the jth that code rate is the second code rate to downstream node A media fragment.

Further, processor 93 are also used to receive the first media transmission request that downstream node is sent in receiver 91 Before, control server is established http session with downstream node and is connect.

Receiver 91, the push function for being also used to receive downstream node transmission enable message, and push function enables message and uses The continuous media fragment of the same media stream file of same code rate is sent to downstream node in instruction server.

The embodiment of the present invention also provides a kind of user equipment, as shown in figure 15, comprising: transmitter A1 and receiver A2.

Transmitter A1 carries first in the request of the first media transmission for sending the request of the first media transmission to server Piece segment information, the media fragment that first segment information is used to indicate request is i-th of media piece of media stream file to be transmitted Section.

Receiver A2, the code rate for receiving server transmission are i-th of media fragment of the first code rate.

Receiver A2, the code rate for being also used to receive server transmission is the i+1 media fragment of the first code rate.

Further, as shown in figure 16, the user equipment in the embodiment of the present invention further include: processor A3.

Processor A3, for accessing user equipment before transmitter A1 sends the request of the first media transmission to server Local cache, and i-th of media fragment is not found in the local cache of user equipment.

Further, as shown in figure 17, the user equipment in the embodiment of the present invention further include: player A4.

Player A4, for receiving i-th of media fragment that the code rate that server is sent is the first code rate in receiver A2 Later, i-th of media fragment that code rate is the first code rate is played.

Processor A3 is also used to receive the i+1 media that the code rate that server is sent is the first code rate in receiver A2 After segment, the local cache of user equipment is accessed, and finding code rate in the local cache of user equipment is the first code rate I+1 media fragment.

Player A4 is also used to play the i+1 media fragment that code rate is the first code rate.

Further, it if 1≤i < N-1, receiver A2, is also used to receiving the code rate that server is sent be first yard After the i+1 media fragment of rate, the i-th+2 media fragments that the code rate that server is sent is the first code rate are received.

Further, processor A3 is also used to access the local cache of user equipment, and unslow in the local of user equipment J-th of media fragment that code rate is the second code rate is found in depositing, 1≤j≤N, j are positive integer, the second code rate and the first code rate It is different.

Transmitter A1 is also used to send the request of the second media transmission to server, carries the in the request of the second media transmission Two segment informations and the second code rate information, the media fragment that second segment information is used to indicate request is j-th of media fragment, the The code rate that two code rate informations are used to indicate the media fragment of request is the second code rate.

Receiver A2, the code rate for being also used to receive server transmission is j-th of media fragment of the second code rate.

Player A4 is also used to play j-th of media fragment that code rate is the second code rate.

Further, processor A3 is also used to before transmitter A1 sends the request of the first media transmission to server, control User equipment processed is established http session with server and is connect.

Transmitter A1 is also used to send push function to server and enables message, and push function enables message and is used to indicate Server sends the continuous media fragment of the same media stream file of same code rate to user equipment.

The embodiment of the present invention also provides a kind of DASH agent entity, as shown in figure 18, comprising: receiver B1 and transmitter B2。

Receiver B1 takes in the request of the first media transmission for receiving the first media transmission request of user equipment transmission First segment information of band, the media fragment that first segment information is used to indicate request is i-th of media stream file to be transmitted Media fragment.

Transmitter B2 sends the first matchmaker to server if having i-th of media fragment for DASH agent entity to be uncached Body transmission request.

Receiver B1, the code rate for being also used to receive server transmission is i-th of media fragment of the first code rate.

Transmitter B2 is also used to send i-th of media fragment that code rate is the first code rate to user equipment.

Receiver B1, the code rate for being also used to receive server transmission is the i+1 media fragment of the first code rate.

Further, receiver B1 is first yard receiving the code rate that server is sent if being also used to 1≤i < N-1 After the i+1 media fragment of rate, the i-th+2 media fragments that the code rate that server is sent is the first code rate are received.

Further, receiver B1, is also used to receive the second media transmission request of user equipment transmission, and the second media pass Carry second segment information and the second code rate information in defeated request, second segment information be used to indicate request media fragment be to J-th of media fragment of the media stream file of transmission, 1≤j≤N, j are positive integer, and the second code rate information is used to indicate request The code rate of media fragment is the second code rate, and the second code rate is different from the first code rate.

Transmitter B2, if being also used to uncached j-th of the media fragment for having code rate for the second code rate of DASH agent entity, The request of the second media transmission is sent to server.

Receiver B1, the code rate for being also used to receive server transmission is j-th of media fragment of the second code rate.

Transmitter B2 is also used to send j-th of media fragment that code rate is the second code rate to user equipment.

Further, as shown in figure 19, the DASH agent entity in the embodiment of the present invention further include: processor B3.

Processor B3, for controlling before the first media transmission request that receiver B1 receives that user equipment is sent DASH agent entity is established http session with user equipment and is connect, and controls DASH agent entity and establish http session with server Connection.

Transmitter B2 is also used to send push function to server and enables message, and push function enables message and is used to indicate Server sends the continuous media fragment of the same media stream file of same code rate to DASH agent entity.

Through the above description of the embodiments, it is apparent to those skilled in the art that, for description It is convenienct and succinct, only the example of the division of the above functional modules, in practical application, can according to need and will be upper It states function distribution to be completed by different functional modules, i.e., the internal structure of device is divided into different functional modules, to complete All or part of function described above.The specific work process of the system, apparatus, and unit of foregoing description, before can referring to The corresponding process in embodiment of the method is stated, details are not described herein.

In several embodiments provided herein, it should be understood that disclosed system, device and method can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the module or The division of unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units Or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, institute Display or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit Indirect coupling or communication connection can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list Member both can take the form of hardware realization, can also realize in the form of software functional units.

If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server or the network equipment etc.) or processor (English: processor) execute this hair The all or part of the steps of bright each embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only deposits Reservoir (English: Read-Only Memory, abbreviation: ROM), random access memory (English: Random Access Memory, abbreviation: RAM), the various media that can store program code such as magnetic or disk.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims

1. a kind of media stream transmission method characterized by comprising

Server receives the first media transmission request that downstream node is sent, and carries first in the first media transmission request Segment information, the media fragment that first segment information is used to indicate request is i-th of media of media stream file to be transmitted Segment；

The server is requested according to first media transmission, and it is the described of the first code rate that Xiang Suoshu downstream node, which sends code rate, I-th of media fragment；

Wherein, the media stream file to be transmitted is divided into N number of continuous media fragment, and 1≤i < N, i and N are positive whole Number.

2. the method according to claim 1, wherein it is institute that the server, which sends code rate to the downstream node, State the i+1 media fragment of the first code rate, comprising:

The server determines that the first moment, first moment are to send according to the playing duration of i-th of media fragment At the time of the i+1 media fragment；

The server sends the i+1 that code rate is first code rate to the downstream node at first moment Media fragment.

3. the method according to claim 1, wherein the server is requested according to first media transmission, I-th of media fragment that code rate is the first code rate is sent to the downstream node, comprising:

The server determines first code rate according to strategy predetermined；

4. the method according to claim 1, wherein also carrying the first code rate in first media transmission request Information, the code rate that first code rate information is used to indicate the media fragment of request is first code rate；

The server is requested according to first media transmission, and it is the described of the first code rate that Xiang Suoshu downstream node, which sends code rate, I-th of media fragment, comprising:

5. method according to any of claims 1-4, which is characterized in that if 1≤i < N-1, in the server After sending the i+1 media fragment that code rate is first code rate to the downstream node, the method also includes:

6. method according to any of claims 1-4, which is characterized in that the method also includes:

The server receives the second media transmission request that the downstream node is sent, and takes in the second media transmission request Second segment information of band and the second code rate information, the media fragment that second segment information is used to indicate request is described to be passed J-th of media fragment of defeated media stream file, 1≤j≤N, j are positive integer, and second code rate information is used to indicate request The code rate of media fragment be the second code rate, second code rate is different from first code rate；

The server is requested according to second media transmission, and it is second code rate that Xiang Suoshu downstream node, which sends code rate, J-th of media fragment.

7. method according to any of claims 1-4, which is characterized in that receive downstream node hair in the server Before the first media transmission request sent, the method also includes:

The server receives the push function that the downstream node is sent and enables message, and the push function enables message and is used for Indicate that the server sends the continuous media fragment of the same media stream file of same code rate to the downstream node.

8. method according to any of claims 1-4, which is characterized in that the downstream node is user equipment；Or Person, the downstream node are hypertext transfer protocol dynamic self-adapting stream DASH agent entity.

9. a kind of media stream transmission method characterized by comprising

User equipment sends the request of the first media transmission to server, carries the first segment letter in the first media transmission request Breath, the media fragment that first segment information is used to indicate request is i-th of media fragment of media stream file to be transmitted；

10. according to the method described in claim 9, it is characterized in that, sending the first media to server in the user equipment Before transmission request, the method also includes:

The local cache of user equipment described in the user equipment access is not found in the local cache of the user equipment I-th of media fragment.

11. according to the method described in claim 9, it is characterized in that, receiving what the server was sent in the user equipment After code rate is i-th of media fragment of the first code rate, the method also includes:

The user equipment receive i+1 media fragment that the code rate that the server is sent is first code rate it Afterwards, the method also includes:

The local cache of user equipment described in the user equipment access finds code in the local cache of the user equipment Rate is the i+1 media fragment of first code rate, and plays the i+1 media fragment that code rate is first code rate.

12. the method according to any one of claim 9-11, which is characterized in that in the first media transmission request also The first code rate information is carried, the code rate that first code rate information is used to indicate the media fragment of request is first code rate.

13. the method according to any one of claim 9-11, which is characterized in that if 1≤i < N-1, in the user After equipment receives the i+1 media fragment that the code rate that the server is sent is first code rate, the method is also wrapped It includes:

14. the method according to any one of claim 9-11, which is characterized in that the method also includes:

The local cache of user equipment described in the user equipment access is not found in the local cache of the user equipment Code rate is j-th of media fragment of the second code rate, and 1≤j≤N, j are positive integer, and second code rate and first code rate are not Together；

The user equipment sends the request of the second media transmission to the server, and the is carried in second media transmission request Two segment informations and the second code rate information, the media fragment that second segment information is used to indicate request is j-th of matchmaker Body segment, the code rate that second code rate information is used to indicate the media fragment of request is second code rate；

The user equipment receives j-th of media fragment that the code rate that the server is sent is second code rate, and Play j-th of media fragment that code rate is second code rate.

15. the method according to any one of claim 9-11, which is characterized in that sent out in the user equipment to server Before sending the first media transmission to request, the method also includes:

The user equipment sends push function to the server and enables message, and the push function enables message and is used to indicate The server sends the continuous media fragment of the same media stream file of same code rate to the user equipment.

16. a kind of media stream transmission method characterized by comprising

Hypertext transfer protocol dynamic self-adapting stream DASH agent entity receives the first media transmission request that user equipment is sent, First segment information is carried in the first media transmission request, first segment information is used to indicate the media fragment of request For i-th of media fragment of media stream file to be transmitted；

If the DASH agent entity is uncached i-th of media fragment, the DASH agent entity is sent out to server First media transmission is sent to request；

The DASH agent entity receives i-th of media fragment that the code rate that the server is sent is the first code rate, and I-th of media fragment that code rate is first code rate is sent to the user equipment；

The DASH agent entity receives the i+1 media fragment that the code rate that the server is sent is first code rate；

Wherein, the media stream file to be transmitted is divided into N number of continuous media fragment, and 1≤i < N, i, N are positive whole Number.

17. according to the method for claim 16, which is characterized in that also carry first yard in the first media transmission request Rate information, the code rate that first code rate information is used to indicate the media fragment of request is first code rate.

18. according to the method for claim 16, which is characterized in that if 1≤i < N-1, connect in the DASH agent entity After receiving the i+1 media fragment that the code rate that the server is sent is first code rate, the method also includes:

The DASH agent entity receives the i-th+2 media fragments that the code rate that the server is sent is first code rate.

19. method described in any one of 6-18 according to claim 1, which is characterized in that the method also includes:

The DASH agent entity receives the second media transmission request that the user equipment is sent, and second media transmission is asked Second segment information of middle carrying and the second code rate information are asked, second segment information is used to indicate the media fragment of request as institute J-th of media fragment of media stream file to be transmitted is stated, 1≤j≤N, j are positive integer, and second code rate information is for referring to The code rate for showing the media fragment of request is the second code rate, and second code rate is different from first code rate；

There is code rate for j-th of media fragment of second code rate if the DASH agent entity is uncached, it is described DASH agent entity sends the second media transmission request to the server；

The DASH agent entity receives j-th of media piece that the code rate that the server is sent is second code rate Section, and j-th of media fragment that code rate is second code rate is sent to the user equipment.

20. method described in any one of 6-18 according to claim 1, which is characterized in that received in the DASH agent entity Before the first media transmission request that user equipment is sent, the method also includes:

The DASH agent entity is established hypertext transfer protocol http session with the user equipment and is connect, the DASH agency Entity is established http session with the server and is connect；

The DASH agent entity sends push function to the server and enables message, and the push function enables message and is used for Indicate that the server sends the continuous media fragment of the same media stream file of same code rate to the DASH agent entity.

21. a kind of server characterized by comprising

Receiver carries in the first media transmission request for receiving the first media transmission request of downstream node transmission First segment information, the media fragment that first segment information is used to indicate request is the i-th of media stream file to be transmitted A media fragment；

Transmitter, for being requested according to first media transmission, Xiang Suoshu downstream node sends code rate as the institute of the first code rate State i-th of media fragment；

The transmitter is also used to send the i+1 media fragment that code rate is first code rate to the downstream node；

22. server according to claim 21, which is characterized in that the server, further includes:

Processor determines that the first moment, first moment are hair for the playing duration according to i-th of media fragment At the time of sending the i+1 media fragment；

The transmitter, specifically for sending code rate to the downstream node at first moment as the institute of first code rate State i+1 media fragment.

23. server according to claim 21, which is characterized in that the server, further includes:

Processor, for sending i-th of matchmaker that code rate is first code rate to the downstream node in the transmitter Before body segment, first code rate is determined according to strategy predetermined.

24. server according to claim 21, which is characterized in that also carry first in the first media transmission request Code rate information, the code rate that first code rate information is used to indicate the media fragment of request is first code rate；

The server, further includes:

Processor, for sending i-th of matchmaker that code rate is first code rate to the downstream node in the transmitter Before body segment, first code rate is determined according to first code rate information.

25. the server according to any one of claim 21-24, which is characterized in that if 1≤i < N-1, the transmission Device is also used to after sending the i+1 media fragment that code rate is first code rate to the downstream node, under described It swims node and sends the i-th+2 media fragments that code rate is first code rate.

26. the server according to any one of claim 21-24, which is characterized in that the receiver is also used to receive The second media transmission request that the downstream node is sent carries second segment information and the in the second media transmission request Two code rate informations, the media fragment that second segment information is used to indicate request is the of the media stream file to be transmitted J media fragment, 1≤j≤N, j are positive integer, and the code rate for the media fragment that second code rate information is used to indicate request is Second code rate, second code rate are different from first code rate；

The transmitter is also used to be requested according to second media transmission, and it is described that Xiang Suoshu downstream node, which sends code rate, J-th of media fragment of two code rates.

27. the server according to any one of claim 21-24, which is characterized in that the server, further includes:

Processor, for controlling the clothes before the first media transmission request that the receiver receives that downstream node is sent Business device is established hypertext transfer protocol http session with the downstream node and is connect；

The receiver is also used to receive the push function that the downstream node is sent and enables message, and the push function is enabled Message is used to indicate the continuous media that the server sends the same media stream file of same code rate to the downstream node Segment.

28. the server according to any one of claim 21-24, which is characterized in that the downstream node sets for user It is standby；Alternatively, the downstream node is hypertext transfer protocol dynamic self-adapting stream DASH agent entity.

29. a kind of user equipment characterized by comprising

Transmitter carries first in the first media transmission request for sending the request of the first media transmission to server Segment information, the media fragment that first segment information is used to indicate request is i-th of media of media stream file to be transmitted Segment；

The receiver is also used to receive the i+1 media fragment that the code rate that the server is sent is first code rate；

30. user equipment according to claim 29, which is characterized in that the user equipment, further includes:

Processor, for accessing the user equipment before the transmitter sends the request of the first media transmission to server Local cache, and i-th of media fragment is not found in the local cache of the user equipment.

31. user equipment according to claim 29, which is characterized in that the user equipment, further includes:

Player, for receiving i-th of media that the code rate that the server is sent is the first code rate in the receiver After segment, i-th of media fragment that code rate is first code rate is played；

The user equipment, further includes:

Processor, for receiving the i+1 matchmaker that the code rate that the server is sent is first code rate in the receiver After body segment, the local cache of the user equipment is accessed, and find code rate in the local cache of the user equipment For the i+1 media fragment of first code rate；

32. the user equipment according to any one of claim 29-31, which is characterized in that first media transmission is asked The first code rate information is also carried in asking, the code rate that first code rate information is used to indicate the media fragment of request is described first Code rate.

33. the user equipment according to any one of claim 29-31, which is characterized in that described to connect if 1≤i < N-1 Device is received, is also used to after receiving the i+1 media fragment that the code rate that the server is sent is first code rate, receives The code rate that the server is sent is the i-th+2 media fragments of first code rate.

34. the user equipment according to any one of claim 29-31, which is characterized in that the user equipment also wraps It includes:

Processor for accessing the local cache of the user equipment, and is not searched in the local cache of the user equipment It is j-th of media fragment of the second code rate to code rate, 1≤j≤N, j are positive integer, second code rate and first code rate It is different；

The transmitter is also used to send the second media transmission to the server and request, in the second media transmission request Carry second segment information and the second code rate information, the media fragment that second segment information is used to indicate request is described the J media fragment, the code rate that second code rate information is used to indicate the media fragment of request is second code rate；

The receiver is also used to receive j-th of media piece that the code rate that the server is sent is second code rate Section；

Player, for playing j-th of media fragment that code rate is second code rate.

35. the user equipment according to any one of claim 29-31, which is characterized in that the user equipment further include:

Processor, for controlling the user equipment before the transmitter sends the request of the first media transmission to server Hypertext transfer protocol http session is established with the server to connect；

The transmitter is also used to send push function to the server and enables message, and the push function enables message and uses The continuous media fragment of the same media stream file of same code rate is sent to the user equipment in the instruction server.

36. a kind of hypertext transfer protocol dynamic self-adapting stream DASH agent entity characterized by comprising

Receiver carries in the first media transmission request for receiving the first media transmission request of user equipment transmission First segment information, the media fragment that first segment information is used to indicate request is the i-th of media stream file to be transmitted A media fragment；

Transmitter, if having i-th of media fragment for the DASH agent entity to be uncached, send to server described in The request of first media transmission；

The receiver is also used to receive i-th of media fragment that the code rate that the server is sent is the first code rate；

The transmitter is also used to send i-th of media fragment that code rate is first code rate to the user equipment；

37. DASH agent entity according to claim 36, which is characterized in that also taken in the first media transmission request The first code rate information of band, the code rate that first code rate information is used to indicate the media fragment of request is first code rate.

38. DASH agent entity according to claim 36, which is characterized in that the receiver, if being also used to 1≤i < N- 1, then after receiving the i+1 media fragment that the code rate that the server is sent is first code rate, receive the clothes The code rate that business device is sent is the i-th+2 media fragments of first code rate.

39. the DASH agent entity according to any one of claim 36-38, which is characterized in that the receiver is also used It is requested in receiving the second media transmission that the user equipment is sent, carries the second segment letter in the second media transmission request Breath and the second code rate information, the media fragment that second segment information is used to indicate request is the Media Stream text to be transmitted J-th of media fragment of part, 1≤j≤N, j are positive integer, and second code rate information is used to indicate the media fragment of request Code rate is the second code rate, and second code rate is different from first code rate；

The transmitter, if being also used to uncached described j-th for having code rate for second code rate of the DASH agent entity Media fragment then sends the second media transmission request to the server；

The transmitter is also used to send j-th of media fragment that code rate is second code rate to the user equipment.

40. the DASH agent entity according to any one of claim 36-38, which is characterized in that the DASH agency is real Body, further includes:

Processor, before the first media transmission request for receiving user equipment transmission in the receiver, described in control DASH agent entity is established hypertext transfer protocol http session with the user equipment and is connect, and it is real to control the DASH agency Body is established http session with the server and is connect；

The transmitter is also used to send push function to the server and enables message, and the push function enables message and uses The continuous media piece of the same media stream file of same code rate is sent to the DASH agent entity in the instruction server Section.