WO2016172967A1

WO2016172967A1 - Media stream transmission method and device

Info

Publication number: WO2016172967A1
Application number: PCT/CN2015/078125
Authority: WO
Inventors: 夏海涛; 熊春山; 韦安妮
Original assignee: 华为技术有限公司
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2016-11-03
Also published as: CN106464985A; CN106464985B

Abstract

Disclosed are a media stream transmission method and device, which relate to the technical field of communications and can improve the real-time performance of a user equipment acquiring a media stream file. The main design concept is: by using an active sending manner, after receiving a first media transmission request sent by a downstream node, a server sends the ith media segment with a code rate being a first code rate to the downstream node according to the first media transmission request, and subsequently sends the i+1th media segment with the code rate being the first code rate to the downstream node, wherein a media stream file to be transmitted is divided into N continuous media segments, 1 ≤ i ＜ N, and both i and N are positive integers.

Description

Media stream transmission method and device

Technical field

The present invention relates to the field of communications technologies, and in particular, to a media stream transmission method and apparatus.

Background technique

Hyper Adaptive Transfer Streaming Protocol (English: Dynamic Adaptive Streaming over HTTP, abbreviation: DASH) is a rate-adaptive media streaming technology loaded on the HTTP protocol.

The DASH technology is used to divide the media stream files (for example, video files, audio files, etc.) to be transmitted into multiple consecutive media segments (English: segment). For each media segment, the server provides multiple versions with different bitrates. For user equipment selection. The user equipment sends a media transmission request to the server according to the media presentation description (English: Media Presentation Description, MPD) file of the media stream file to be transmitted and the network condition (eg, wireless channel quality) evaluated by itself, to request to acquire the specific code. Rate of media clips. The MPD file is used to describe a storage format of the media stream file to be transmitted, including a storage format of each media segment. After receiving the media transmission request sent by the user equipment, the server sends the media segment of the specific code rate to the user equipment. However, since the end-to-end transmission between the server and the user equipment experiences multiple network nodes of the operator network, when the state of the network changes dynamically, especially when the network is congested, the actual transmission between the user equipment and the server is The delay is long. Therefore, it is difficult to ensure that the user equipment obtains the real-time performance of the media stream file to be transmitted.

In order to improve the real-time performance of the user equipment to obtain the media stream file to be transmitted, the prior art provides a method: setting a DASH proxy entity with caching capability on a network node close to the user equipment, and the DASH proxy entity may obtain the data from the server. Each media segment is cached. When the DASH proxy entity receives the media transmission request of the specific code rate sent by the user equipment, if the DASH proxy entity caches the specific code rate a media segment, the DASH proxy entity sends the media segment of the code rate to the user equipment; if the media segment of the specific bit rate is not cached in the DASH proxy entity, the DASH proxy entity needs to further send a media transmission request to the server to request to obtain the media segment. The media segment of the code rate, after the DASH proxy entity receives the media segment of the code rate sent by the server, sends the media segment of the code rate to the user equipment.

The problem with the above method is that the server sends the media segment of the specific bit rate to the DASH proxy entity only after receiving the media transmission request sent by the DASH proxy entity. Therefore, if no other user equipment requests the DASH proxy entity. For a media segment of a specific code rate, the media segment of the specific bit rate is not cached in the DASH proxy entity, and the server still needs to wait for a media transmission request from the DASH client forwarded from the DASH proxy entity, and then forwards the request to the user equipment through the DASH proxy entity. The media segment of the specific code rate still cannot effectively solve the problem that the user equipment acquires the real-time performance of the media stream file to be transmitted by using the above method.

Summary of the invention

The embodiment of the invention provides a media stream transmission method and device, which can improve the real-time performance of the user equipment to obtain the media stream file.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A first aspect of the embodiments of the present invention provides a media stream transmission method, including:

The server receives the first media transmission request sent by the downstream node, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the ith of the media stream file to be transmitted. Media clip

Sending, by the server, the i th media segment with a code rate of a first code rate to the downstream node according to the first media transmission request;

Sending, by the server, the i+1th media segment whose code rate is the first code rate to the downstream node;

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i and N are positive integers.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the server sends, to the downstream node, an i+1th media slice whose code rate is the first code rate. Segments, including:

Determining, by the server, a first time according to a playing duration of the i-th media segment, where the first time is a time for sending the (i+1)th media segment;

Sending, by the server, the i+1th media segment whose code rate is the first code rate to the downstream node at the first time.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the server sends a code to the downstream node according to the first media transmission request The ith media segment of the first code rate, comprising:

Determining, by the server, the first code rate according to a predefined policy;

The server sends the i-th media segment whose code rate is the first code rate to the downstream node.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the first media transmission request further carries first code rate information, where The code rate information is used to indicate that the code rate of the requested media segment is the first code rate;

Sending, by the server, the ith media segment with a code rate of the first code rate to the downstream node according to the first media transmission request, including:

Determining, by the server, the first code rate according to the first code rate information;

With reference to the first aspect and the foregoing possible implementation manner, in a fourth possible implementation manner of the first aspect, if 1≤i<N-1, the code rate sent by the server to the downstream node is the After the i+1th media segment of the first code rate, the method further includes:

The server sends the i+2th media segment whose code rate is the first code rate to the downstream node.

With reference to the first aspect and the foregoing possible implementation manner, in a fifth possible implementation manner of the first aspect, the method further includes:

Receiving, by the server, a second media transmission request sent by the downstream node, where The second media transmission request carries the second segment information and the second code rate information, where the second segment information is used to indicate that the requested media segment is the jth media segment of the media stream file to be transmitted, 1≤j ≤ N, j is a positive integer, the second code rate information is used to indicate that the code rate of the requested media segment is a second code rate, and the second code rate is different from the first code rate;

And the server sends, according to the second media transmission request, the jth media segment whose code rate is the second code rate to the downstream node.

With reference to the first aspect and the foregoing possible implementation manner, in a sixth possible implementation manner of the first aspect, before the server receives the first media transmission request sent by the downstream node, the method further includes:

The server establishes a hypertext transfer protocol HTTP session connection with the downstream node;

The server receives a push function enable message sent by the downstream node, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the downstream node.

With reference to the first aspect and the foregoing possible implementation manner, in the seventh possible implementation manner of the first aspect, the downstream node is a user equipment; or the downstream node is a hypertext transfer protocol dynamic adaptive flow DASH proxy entity.

A second aspect of the embodiments of the present invention provides a media stream transmission method, including:

The user equipment sends a first media transmission request to the server, where the first media transmission request carries the first fragment information, where the first fragment information is used to indicate that the requested media segment is the i-th media of the media stream file to be transmitted. Fragment

Receiving, by the user equipment, the ith media segment that is sent by the server to a first code rate;

Receiving, by the user equipment, an i+1th media segment that is sent by the server and having a code rate of the first code rate;

In conjunction with the second aspect, in a first possible implementation of the second aspect, Before the user equipment sends the first media transmission request to the server, the method further includes:

The user equipment accesses the local cache of the user equipment, and the i-th media segment is not found in the local cache of the user equipment.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the user equipment receives, at a first code rate, the code rate sent by the server After the ith media segment, the method further includes:

The user equipment plays a code rate of the ith media segment of the first code rate;

After the user equipment receives the (i+1)th media segment that is sent by the server and the code rate is the first code rate, the method further includes:

The user equipment accesses a local cache of the user equipment, and finds, in a local cache of the user equipment, an i+1th media segment whose code rate is the first code rate, and the play rate is the number The i+1th media segment of a bit rate.

With reference to the second aspect and the foregoing possible implementation manner, in a third possible implementation manner of the second aspect, the first media transmission request further carries first code rate information, where the first code rate information is used A code rate indicating the requested media segment is the first code rate.

With reference to the second aspect and the foregoing possible implementation manner, in a fourth possible implementation manner of the second aspect, if 1≤i<N-1, the user equipment receives the code rate sent by the server. After the i+1th media segment of the first code rate, the method further includes:

The user equipment receives an i+2th media segment whose code rate sent by the server is the first code rate.

With reference to the second aspect and the foregoing possible implementation manner, in a fifth possible implementation manner of the second aspect, the method further includes:

The user equipment accesses the local cache of the user equipment, and does not find the jth media segment whose code rate is the second code rate in the local buffer of the user equipment, where 1≤j≤N, j is a positive integer. The second code rate is different from the first code rate;

The user equipment sends a second media transmission request to the server, where the second media transmission request carries the second fragment information and the second rate information, the second fragment The information is used to indicate that the requested media segment is the jth media segment, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate;

The user equipment receives the jth media segment sent by the server and the code rate is the jth media segment of the second code rate.

With reference to the second aspect and the foregoing possible implementation manner, in a sixth possible implementation manner of the second aspect, before the user equipment sends the first media transmission request to the server, the method further includes:

The user equipment establishes a hypertext transfer protocol HTTP session connection with the server;

The user equipment sends a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the user equipment.

A third aspect of the embodiments of the present invention provides a media stream transmission method, including:

The hypertext transfer protocol dynamic adaptive stream DASH proxy entity receives the first media transmission request sent by the user equipment, where the first media transmission request carries the first fragment information, where the first fragment information is used to indicate that the requested media segment is The i-th media segment of the media stream file to be transmitted;

If the DASH proxy entity does not cache the i-th media segment, the DASH proxy entity sends the first media transmission request to the server;

Receiving, by the DASH proxy entity, the ith media segment of the first code rate sent by the server, and sending, to the user equipment, the i-th media with a code rate of the first code rate Fragment

The DASH proxy entity receives an i+1th media segment of the first code rate sent by the server;

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i, N are positive integers.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the first media transmission request further carries first code rate information, where the first code rate information is used A code rate indicating the requested media segment is the first code rate.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, if 1≤i<N-1, the DASH proxy entity receives the After the code rate sent by the server is the i+1th media segment of the first code rate, the method further includes:

The DASH proxy entity receives the i+2th media segment that the code rate sent by the server is the first code rate.

With reference to the third aspect and the foregoing possible implementation manner, in a third possible implementation manner of the third aspect, the method further includes:

The DASH proxy entity receives the second media transmission request sent by the user equipment, where the second media transmission request carries the second fragment information and the second rate information, where the second fragment information is used to indicate the requested media. The fragment is the j-th media segment of the media stream file to be transmitted, 1≤j≤N, j is a positive integer, and the second rate information is used to indicate that the code rate of the requested media segment is the second code rate. The second code rate is different from the first code rate;

And if the DASH proxy entity does not cache the jth media segment with a code rate of the second code rate, the DASH proxy entity sends the second media transmission request to the server;

Receiving, by the DASH proxy entity, the jth media segment sent by the server with the code rate of the second code rate, and transmitting, to the user equipment, the code rate of the jth rate of the second code rate Media clips.

With reference to the third aspect and the foregoing possible implementation manner, in a fourth possible implementation manner of the third aspect, before the receiving, by the DASH proxy entity, the first media transmission request sent by the user equipment, the method further includes:

The DASH proxy entity establishes a hypertext transfer protocol HTTP session connection with the user equipment, and the DASH proxy entity establishes an HTTP session connection with the server;

Sending, by the DASH proxy entity, a push function enable message to the server, where the push function enable message is used to instruct the server to send the DASH proxy entity A contiguous piece of media of the same media stream file that is sent at the same code rate.

A fourth aspect of the embodiments of the present invention provides a server, including:

a receiving unit, configured to receive a first media transmission request sent by a downstream node, where the first media transmission request carries a first segment information, where the first segment information is used to indicate that the requested media segment is a media stream file to be transmitted. The i-th media segment;

a sending unit, configured to send, according to the first media transmission request, the i th media segment with a code rate of a first code rate to the downstream node;

The sending unit is further configured to send, to the downstream node, an i+1th media segment whose code rate is the first code rate;

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the server further includes:

a processing unit, configured to determine, according to a play duration of the i-th media segment, a first time, where the first time is a time when the (i+1)th media segment is sent;

The sending unit is configured to send the i+1th media segment whose code rate is the first code rate to the downstream node at the first time.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the processing unit is further configured to send, by the sending unit, the downstream node Before the code rate is the ith media segment of the first code rate, the first code rate is determined according to a predefined policy.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the first media transmission request further carries first code rate information, where The code rate information is used to indicate that the code rate of the requested media segment is the first code rate;

The processing unit is further configured to determine, according to the first code rate information, before the sending unit sends the i th media segment whose code rate is the first code rate to the downstream node One bit rate.

In combination with the fourth aspect and the above possible implementation manner, the fourth aspect in the fourth aspect In an implementation manner, if 1≤i<N-1, the sending unit is further configured to: after sending the i+1th media segment whose code rate is the first code rate to the downstream node, Transmitting, to the downstream node, an i+2th media segment whose code rate is the first code rate.

With reference to the fourth aspect and the foregoing possible implementation manner, in a fifth possible implementation manner of the fourth aspect, the receiving unit is further configured to receive a second media transmission request that is sent by the downstream node, where the second The media transmission request carries the second segment information and the second code rate information, where the second segment information is used to indicate that the requested media segment is the jth media segment of the media stream file to be transmitted, 1≤j≤N And j is a positive integer, the second code rate information is used to indicate that a code rate of the requested media segment is a second code rate, and the second code rate is different from the first code rate;

The sending unit is further configured to send, according to the second media transmission request, the jth media segment whose code rate is the second code rate to the downstream node.

With reference to the fourth aspect and the foregoing possible implementation manner, in a sixth possible implementation manner of the fourth aspect, the processing unit is further configured to: before the receiving unit receives the first media transmission request sent by the downstream node, Controlling, by the server, a hypertext transfer protocol HTTP session connection with the downstream node;

The receiving unit is further configured to receive a push function enable message sent by the downstream node, where the push function enable message is used to instruct the server to send the same media stream file of the same code rate to the downstream node. Media clips.

With reference to the fourth aspect and the foregoing possible implementation manner, in a seventh possible implementation manner of the fourth aspect, the downstream node is a user equipment; or the downstream node is a hypertext transfer protocol dynamic adaptive flow DASH proxy entity.

A fifth aspect of the embodiments of the present invention provides a user equipment, including:

a sending unit, configured to send a first media transmission request to the server, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the media stream file to be transmitted. i media clips;

a receiving unit, configured to receive the ith media segment that is sent by the server to a first code rate;

The receiving unit is further configured to receive a code rate sent by the server as the first The i+1th media segment of the code rate;

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the user equipment further includes:

The processing unit is configured to access the local cache of the user equipment before the sending unit sends the first media transmission request to the server, and the i-th media segment is not found in the local cache of the user equipment.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in the second possible implementation manner of the fifth aspect, the user equipment further includes:

a playing unit, configured to: after the receiving unit receives the ith media segment that is sent by the server and the code rate is the first code rate, play the ith media of the first code rate Fragment

The processing unit is further configured to: after receiving, by the receiving unit, the i+1th media segment of the first code rate sent by the server, accessing a local cache of the user equipment, and Finding an i+1th media segment whose code rate is the first code rate in a local cache of the user equipment;

The playing unit is further configured to play the i+1th media segment whose code rate is the first code rate.

With reference to the fifth aspect and the foregoing possible implementation manner, in a third possible implementation manner of the fifth aspect, the first media transmission request further carries first code rate information, where the first code rate information is used A code rate indicating the requested media segment is the first code rate.

With reference to the fifth aspect and the foregoing possible implementation manner, in a fourth possible implementation manner of the fifth aspect, the receiving unit is further configured to receive the sending by the server, if 1≤i<N-1 After the code rate is the i+1th media segment of the first code rate, the first and second media segments of the first code rate are received by the server.

With reference to the fifth aspect and the foregoing possible implementation manner, in a fifth possible implementation manner of the fifth aspect, the processing unit is further configured to access a local part of the user equipment Caching, and not finding the jth media segment whose code rate is the second code rate in the local buffer of the user equipment, 1≤j≤N, j is a positive integer, the second code rate and the first One code rate is different;

The sending unit is further configured to send a second media transmission request to the server, where the second media transmission request carries second segment information and second code rate information, where the second segment information is used to indicate the request The media segment is the jth media segment, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate;

The receiving unit is further configured to receive, by the server, the jth media segment whose code rate is the second code rate;

The playing unit is further configured to play the j-th media segment whose code rate is the second code rate.

With reference to the fifth aspect and the foregoing possible implementation manner, in a sixth possible implementation manner of the fifth aspect, the processing unit is further configured to: before the sending unit sends the first media transmission request to the server, Determining that the user equipment establishes a hypertext transfer protocol HTTP session connection with the server;

The sending unit is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media of the same media stream file of the same code rate to the user equipment. Fragment.

A sixth aspect of the embodiments of the present invention provides a hypertext transfer protocol dynamic adaptive stream DASH proxy entity, including:

a receiving unit, configured to receive a first media transmission request sent by the user equipment, where the first media transmission request carries a first fragment information, where the first fragment information is used to indicate that the requested media segment is a media stream file to be transmitted The i-th media segment;

a sending unit, configured to send the first media transmission request to a server if the ith media segment is not cached by the DASH proxy entity;

The receiving unit is further configured to receive the ith media segment that is sent by the server to a first code rate;

The sending unit is further configured to send, to the user equipment, the ith media segment whose code rate is the first code rate;

The receiving unit is further configured to receive, by the server, an i+1th media segment whose code rate is the first code rate;

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the first media transmission request further carries first code rate information, where the first code rate information is used to indicate the requested media segment The code rate is the first code rate.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the receiving unit is further configured to: if 1≤i<N-1, After receiving the i+1th media segment of the first code rate sent by the server, receiving the i+2 media segment of the first code rate sent by the server.

With reference to the sixth aspect and the foregoing possible implementation manner, in a third possible implementation manner of the sixth aspect, the receiving unit is further configured to receive a second media transmission request that is sent by the user equipment, where the second The media transmission request carries the second segment information and the second code rate information, where the second segment information is used to indicate that the requested media segment is the jth media segment of the media stream file to be transmitted, 1≤j≤N And j is a positive integer, the second code rate information is used to indicate that a code rate of the requested media segment is a second code rate, and the second code rate is different from the first code rate;

The sending unit is further configured to: if the DASH proxy entity does not cache the jth media segment with a code rate of the second code rate, send the second media transmission request to the server;

The sending unit is further configured to send, to the user equipment, the jth media segment whose code rate is the second code rate.

With reference to the sixth aspect and the foregoing possible implementation manner, in a fourth possible implementation manner of the sixth aspect, the DASH proxy entity further includes:

a processing unit, configured to receive, by the receiving unit, the first media sent by the user equipment Before transmitting the request, controlling the DASH proxy entity to establish a hypertext transfer protocol HTTP session connection with the user equipment, and controlling the DASH proxy entity to establish an HTTP session connection with the server;

The sending unit is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive contiguous media stream files of the same code rate to the DASH proxy entity. Media clips.

A seventh aspect of the embodiments of the present invention provides a server, including:

The receiver is configured to receive a first media transmission request sent by the downstream node, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the media stream file to be transmitted. The i-th media segment;

a transmitter, configured to send, according to the first media transmission request, the i th media segment with a code rate of a first code rate to the downstream node;

The transmitter is further configured to send, to the downstream node, an i+1th media segment whose code rate is the first code rate;

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the server further includes:

a processor, configured to determine a first time according to a playing duration of the i-th media segment, where the first time is a time when the (i+1)th media segment is sent;

The transmitter is configured to send the i+1th media segment whose code rate is the first code rate to the downstream node at the first time.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the processor is further configured to send, at the sender, the downstream node Before the code rate is the ith media segment of the first code rate, the first code rate is determined according to a predefined policy.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a third possible implementation manner of the seventh aspect, the first media transmission request further carries first code rate information, where A code rate information is used to indicate the bit rate of the requested media segment The first code rate;

The processor is further configured to determine, according to the first code rate information, before the transmitter sends the i th media segment whose code rate is the first code rate to the downstream node One bit rate.

With reference to the seventh aspect and the foregoing possible implementation manner, in a fourth possible implementation manner of the seventh aspect, the device is further configured to send to the downstream node, if 1≤i<N-1 After the code rate is the i+1th media segment of the first code rate, the i+2th media segment whose code rate is the first code rate is sent to the downstream node.

With reference to the seventh aspect and the foregoing possible implementation manner, in a fifth possible implementation manner of the seventh aspect, the receiver is further configured to receive a second media transmission request that is sent by the downstream node, where the second The media transmission request carries the second segment information and the second code rate information, where the second segment information is used to indicate that the requested media segment is the jth media segment of the media stream file to be transmitted, 1≤j≤N And j is a positive integer, the second code rate information is used to indicate that a code rate of the requested media segment is a second code rate, and the second code rate is different from the first code rate;

The transmitter is further configured to send, according to the second media transmission request, the jth media segment whose code rate is the second code rate to the downstream node.

With reference to the seventh aspect and the foregoing possible implementation manner, in a sixth possible implementation manner of the seventh aspect, the processor is further configured to: before the receiver receives the first media transmission request sent by the downstream node, Controlling, by the server, a hypertext transfer protocol HTTP session connection with the downstream node;

The receiver is further configured to receive a push function enable message sent by the downstream node, where the push function enable message is used to instruct the server to send the same media stream file of the same code rate to the downstream node. Media clips.

With reference to the seventh aspect and the foregoing possible implementation manner, in a seventh possible implementation manner of the seventh aspect, the downstream node is a user equipment; or the downstream node is a hypertext transfer protocol dynamic adaptive stream DASH proxy entity.

An eighth aspect of the embodiments of the present invention provides a user equipment, including:

a transmitter, configured to send a first media transmission request to the server, the first media The first fragment information is carried in the transmission request, where the first fragment information is used to indicate that the requested media segment is the i-th media segment of the media stream file to be transmitted;

a receiver, configured to receive the ith media segment that is sent by the server to a first code rate;

The receiver is further configured to receive an i+1th media segment of the first code rate sent by the server;

With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the user equipment further includes:

And a processor, configured to access a local cache of the user equipment, and not find the i-th media segment in a local cache of the user equipment, before the sender sends the first media transmission request to the server.

With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, in the second possible implementation manner of the eighth aspect, the user equipment further includes:

a player, after the receiver receives the ith media segment that is sent by the server and has a code rate of a first code rate, playing the ith media of the first code rate Fragment

The processor is further configured to: after receiving, by the receiver, the i+1th media segment of the first code rate sent by the server, accessing a local cache of the user equipment, and Finding an i+1th media segment whose code rate is the first code rate in a local cache of the user equipment;

The player is further configured to play the i+1th media segment whose code rate is the first code rate.

With reference to the eighth aspect and the foregoing possible implementation manner, in a third possible implementation manner of the eighth aspect, the first media transmission request further carries first code rate information, where the first code rate information is used A code rate indicating the requested media segment is the first code rate.

In combination with the eighth aspect and the above possible implementation manner, the fourth aspect in the eighth aspect In an implementation manner, if 1≤i<N-1, the receiver is further configured to: after receiving the i+1th media segment of the first code rate sent by the server, Receiving, by the server, a code rate of the i+2 media segments of the first code rate.

With reference to the eighth aspect and the foregoing possible implementation manner, in a fifth possible implementation manner of the eighth aspect, the processor is further configured to access a local cache of the user equipment, and is not in the user equipment Finding, in the local cache, the jth media segment whose code rate is the second code rate, 1≤j≤N, j is a positive integer, and the second code rate is different from the first code rate;

The transmitter is further configured to send a second media transmission request to the server, where the second media transmission request carries second segment information and second code rate information, where the second segment information is used to indicate the request The media segment is the jth media segment, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate;

The receiver is further configured to receive the jth media segment that is sent by the server and the code rate is the second code rate;

The player is further configured to play the j-th media segment whose code rate is the second code rate.

With reference to the eighth aspect and the foregoing possible implementation manner, in a sixth possible implementation manner of the eighth aspect, the processor is further configured to: before the sending, by the sender, the first media transmission request to the server, Determining that the user equipment establishes a hypertext transfer protocol HTTP session connection with the server;

The transmitter is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media of the same media stream file of the same code rate to the user equipment. Fragment.

A ninth aspect of the embodiments of the present invention provides a hypertext transfer protocol dynamic adaptive stream DASH proxy entity, including:

a receiver, configured to receive a first media transmission request sent by the user equipment, where the first media transmission request carries a first fragment information, where the first fragment information is used to indicate that the requested media segment is a media stream file to be transmitted. The i-th media segment;

a transmitter, if the ith media is not cached by the DASH proxy entity Fragment, sending the first media transmission request to the server;

The receiver is further configured to receive the ith media segment that is sent by the server to a first code rate;

The transmitter is further configured to send, to the user equipment, the i th media segment whose code rate is the first code rate;

With reference to the ninth aspect, in a first possible implementation manner of the ninth aspect, the first media transmission request further carries first code rate information, where the first code rate information is used to indicate the requested media segment The code rate is the first code rate.

With reference to the ninth aspect, or the first possible implementation manner of the ninth aspect, in the second possible implementation manner of the ninth aspect, the receiver is further configured to: if 1≤i<N-1, After receiving the i+1th media segment of the first code rate sent by the server, receiving the i+2 media segment of the first code rate sent by the server.

With reference to the ninth aspect and the foregoing possible implementation manner, in a third possible implementation manner of the ninth aspect, the receiver is further configured to receive a second media transmission request that is sent by the user equipment, where the second The media transmission request carries the second segment information and the second code rate information, where the second segment information is used to indicate that the requested media segment is the jth media segment of the media stream file to be transmitted, 1≤j≤N And j is a positive integer, the second code rate information is used to indicate that a code rate of the requested media segment is a second code rate, and the second code rate is different from the first code rate;

The transmitter is further configured to: if the DASH proxy entity does not cache the jth media segment with a code rate of the second code rate, send the second media transmission request to the server;

The transmitter is further configured to send, to the user equipment, the jth media segment whose code rate is the second code rate.

With reference to the ninth aspect and the foregoing possible implementation manner, in the fourth possible implementation manner of the ninth aspect, the DASH proxy entity further includes:

a processor, configured to: after the receiver receives the first media transmission request sent by the user equipment, control the DASH proxy entity to establish a hypertext transfer protocol HTTP session connection with the user equipment, and control the DASH proxy entity and The server establishes an HTTP session connection;

The transmitter is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive contiguous media stream files of the same code rate to the DASH proxy entity. Media clips.

The media stream transmission method and apparatus provided by the embodiment of the present invention, after the server sends the i-th media segment whose code rate is the first code rate to the downstream node according to the first media transmission request, the code rate is sent to the downstream node. The i+1th media segment of the code rate does not need to wait for the request of the downstream node, so that the process of obtaining the i+1th media segment of the first code rate by the downstream node in the prior art can be reduced. The waiting delay can improve the real-time performance of the downstream node to obtain the media stream file. In addition, the embodiment of the present invention adopts a method for the server to actively send, and does not require the downstream node to send the request multiple times. Compared with the manner of the request-response message in the prior art, the signaling burden between the devices can be alleviated.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

FIG. 1 is a flowchart of a media stream transmission method according to an embodiment of the present invention;

2 is a flowchart of another media stream transmission method according to an embodiment of the present invention;

FIG. 3 is a flowchart of another media stream transmission method according to an embodiment of the present invention;

FIG. 4 is a flowchart of another media stream transmission method according to an embodiment of the present invention;

FIG. 5 is a flowchart of another media stream transmission method according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a server according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of another server according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a DASH proxy entity according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of another DASH proxy entity according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of another server according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of another server according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure;

FIG. 18 is a schematic structural diagram of another DASH proxy entity according to an embodiment of the present disclosure;

FIG. 19 is a schematic structural diagram of another DASH proxy entity according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention is applied to the DASH technology. The DASH technology is used, and the media stream files to be transmitted (including video files and audio files, etc.) are divided into multiple consecutive media segments. For each media segment, the server provides multiple different Rate version For user equipment selection.

The server in this document is a server that stores all media segments of a media stream file to be transmitted.

The user equipment in this article can be a mobile phone, a personal computer (English: personal computer, abbreviation: PC), a notebook computer, a tablet computer, and the like.

This embodiment describes a media stream transmission method provided by an embodiment of the present invention from the perspective of a server. As shown in FIG. 1, the media stream transmission method provided by the embodiment of the present invention includes:

S101. The server receives a first media transmission request sent by a downstream node.

The downstream node is specifically a network node that is located downstream of the server and has a cache capability. The downstream node may be a user equipment, or the downstream node may be a DASH proxy entity.

The first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the i-th media segment of the media stream file to be transmitted, and the media stream file to be transmitted is divided into N consecutive media segments. The media segment, 1 ≤ i < N, i and N are positive integers. The media stream file to be transmitted may be a video file or an audio file or the like.

Exemplarily, it is assumed that the media stream file to be transmitted is a video file with a playing time of 1 minute. The video file is divided into 10 consecutive media segments with a playback duration of 6 seconds, that is, the first media segment contains the 0th to the second of the video file. For a 6 second video picture, the second media segment contains the 6th to 12th video of the video file, and the third media segment contains the 12th to 18th video of the video file and so on. Of course, the video file may be divided into N consecutive media files whose playing durations are not equal, as long as the content of the video images of the N media segments are continuous, which is not limited in this embodiment of the present invention.

S102. The server sends, according to the first media transmission request, an ith media segment whose code rate is the first code rate to the downstream node.

The first code rate is determined by the server, and the server may determine the first code rate according to a predefined policy, or may determine the first code rate by using other methods. The embodiment here does not limit the manner of determining the first code rate. The predefined policies include: the correspondence between the current load situation of the server and the code rate, the correspondence between the current network congestion and the code rate, and the user type of the user equipment (eg, gold medal users, silver medal users, bronze users, etc.) and codes. The corresponding relationship between the rate and the like is not specifically limited in the embodiment of the present invention.

S103. The server sends, to the downstream node, an i+1th media segment whose code rate is the first code rate.

The i+1th media segment is a media segment that is continuous with the i th media segment.

In general, the code rate of the media segment of the media stream file transmitted in a certain period of time remains unchanged. Therefore, the code rate of the i+1th media segment sent by the server to the downstream node and the code rate of the i th media segment The same, all are the first code rate.

Exemplarily, if i is 1, and the first code rate is 500 kbps (kilobits per second), the server sends a code rate of 500 kbps to the downstream node after transmitting the first media segment with a code rate of 500 kbps to the downstream node. The second media clip. Of course, after the server sends the second media segment with the code rate of 500 kbps to the downstream node, the server may further send the third media segment, the fourth media segment, and the like with a code rate of 500 kbps to the downstream node.

The media stream transmission method provided by the embodiment of the present invention, after the server sends the ith media segment whose code rate is the first code rate to the downstream node according to the first media transmission request, the code rate is sent to the downstream node as the first code. The i+1th media segment of the rate does not need to wait for the request of the downstream node. Therefore, the waiting in the process of obtaining the i+1th media segment of the first code rate by the downstream node in the prior art can be reduced. The delay can improve the real-time performance of the downstream node to obtain the media stream file. In addition, the embodiment of the present invention adopts a method for the server to actively send, and does not require the downstream node to send the request multiple times. Compared with the manner of the request-response message in the prior art, the signaling burden between the devices can be alleviated.

This embodiment describes a media stream transmission method provided by an embodiment of the present invention from the perspective of a user equipment. As shown in FIG. 2, the media stream transmission method provided by the embodiment of the present invention includes:

S201. The user equipment sends a first media transmission request to the server.

The first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the i-th media segment of the media stream file to be transmitted. The media stream file to be transmitted is divided into N consecutive media segments, 1 ≤ i < N, and i and N are both positive integers.

S202. The user equipment receives an ith media segment whose code rate is the first code rate.

S203. The user equipment receives, by the server, a code rate of the i+1th media segment of the first code rate.

The media stream transmission method provided by the embodiment of the present invention, after the user equipment receives the ith media segment of the first code rate sent by the server, and does not need to request the server again, the code rate sent by the receiving server is the first. The i+1th media segment of the code rate, so that the waiting time delay in the process of the user equipment acquiring the i+1th media segment of the first code rate in the prior art can be reduced, and the user equipment can be improved. Get the real-time nature of the media stream file. In addition, the embodiment of the present invention adopts a method for the server to actively send, and does not require the user equipment to send the request multiple times. Compared with the manner of the request-response message in the prior art, the signaling burden between the devices can be alleviated.

This embodiment describes a media stream transmission method provided by an embodiment of the present invention from the perspective of a DASH proxy entity. As shown in FIG. 3, the media stream transmission method provided by the embodiment of the present invention includes:

S301. The DASH proxy entity receives the first media transmission request sent by the user equipment.

S302. If the DASH proxy entity does not cache the i-th media segment, the DASH proxy entity sends a first media transmission request to the server.

Wherein, if the DASH proxy entity does not request the i-th media segment from the server in advance, the DASH proxy entity does not cache the i-th media segment.

S303. The DASH proxy entity receives the ith media segment of the first code rate sent by the server, and sends the ith media segment whose code rate is the first code rate to the user equipment.

S304. The DASH proxy entity receives the i+1th media segment sent by the server with a code rate of the first code rate.

The DASH proxy entity may send the receiving server by sending the i+1th media segment whose code rate is the first bit rate after receiving the ith media segment of the first bit rate sent by the server. The code rate is the i+1th media segment of the first code rate. When the user equipment requests the i+1th media segment whose code rate is the first code rate, the DASH proxy entity has cached the i+1th media segment whose code rate is the first code rate. Therefore, the DASH proxy entity may The i+1th media segment whose code rate is the first code rate is sent to the user equipment.

The media stream transmission method provided by the embodiment of the present invention, after the DASH proxy entity receives the ith media segment of the first code rate sent by the server, and does not need to request the server again, the code rate sent by the server can be received. The i+1th media segment of the code rate can reduce the waiting time delay in the process of obtaining the i+1th media segment of the first bit rate by the DASH proxy entity in the prior art. When the user equipment needs to obtain the i+1th media segment whose code rate is the first code rate, since the DASH proxy entity has cached the i+1th media segment of the first code rate, the user equipment acquires the code. The waiting delay in the process of the i+1th media segment of the first code rate is also reduced, so that the real-time performance of the user equipment to obtain the media stream file can be improved. In addition, the embodiment of the present invention adopts a method for the server to actively send, and does not require the DASH proxy entity to send the request multiple times. Compared with the manner of the request-response message in the prior art, the signaling burden between the devices can be alleviated.

This embodiment describes a media stream transmission method provided by an embodiment of the present invention from the perspective of the server interacting with the user equipment. As shown in FIG. 4, the media stream transmission method provided by the embodiment of the present invention includes:

S401: The server establishes a hypertext transfer protocol (English: HyperText Transfer Protocol, abbreviation: HTTP) session connection with the user equipment.

The specific content of the HTTP session can refer to related descriptions in the prior art. The embodiments of the present invention are not described herein again.

S402. The user equipment sends a push function enable message to the server.

The push (PUSH) function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the user equipment, that is, the server does not need to wait for the media transmission request message sent by the user equipment, and directly sends the media transmission request message to the user equipment. Send consecutive media segments of the same media stream file of the same code rate.

Exemplarily, the format of the push function enable message can be:

SETTINGS_ENABLE_PUSH=1.

S403. The server sends a media presentation description (English: Media Presentation Description, MPD) file to the user equipment.

The MPD file is used to indicate a storage format of each media segment of the media stream file to be transmitted. After the user equipment obtains the MPD file, the user equipment can request the media segment from the server as needed. For a detailed description of the MPD file, reference may be made to the related description in the prior art, and details are not described herein again.

S404. The user equipment accesses the local cache of the user equipment, and the i-th media segment is not found in the local cache of the user equipment.

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i and N are positive integers. If there is no i-th media segment in the local cache of the user equipment, the user equipment needs to request the i-th media segment from the server.

S405. The user equipment sends a first media transmission request to the server.

The first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the i-th media segment of the media stream file to be transmitted.

Specifically, the first segment information may be an identifier of the ith media segment, and is represented by an ID. In the HTTP 2.0 protocol, if the identifier of the i-th media segment is an ID, the identifier of the i+1th media segment is ID+2, and the identifier of the i+1th media segment is ID+4.

S406. The server sends, according to the first media transmission request, an ith media segment whose code rate is the first code rate.

Further, in the first scenario of the embodiment of the present invention, the server determines the first code rate according to the predefined policy, and sends the code rate to the user equipment. i media clips. The predefined policies include: the correspondence between the current load situation of the server and the code rate, the correspondence between the current network congestion and the code rate, and the user type of the user equipment (eg, gold medal users, silver medal users, bronze users, etc.) and codes. The corresponding relationship between the rate and the like is not specifically limited in the embodiment of the present invention.

Further, in the second scenario of the embodiment of the present invention, the first media transmission request further carries the first rate information, where the first rate information is used to indicate that the code rate of the requested media segment is the first code rate. The server determines the first code rate according to the first code rate information, and sends the ith media segment whose code rate is the first code rate to the user equipment.

S407. The user equipment plays the ith media segment of the first code rate.

S408. The server sends, to the user equipment, an i+1th media segment whose code rate is the first code rate.

Specifically, S408 may include: S408a and S408b.

S408. The server determines, according to the playing duration of the i-th media segment, the first time, where the first time is the time when the (i+1)th media segment is sent.

The first moment may be a time earlier than or equal to the end of the ith media segment. For example, the playing time of the i-th media segment is 6 seconds. If the server sends the i-th media segment with the first bit rate to the user equipment at the first minute and 0 seconds, regardless of the transmission time of the i-th media segment, Then the server can determine that the first time is any time between 1 minute 0 seconds and 1 minute 6 seconds.

S408b: The server sends, to the user equipment, the i+1th media segment whose code rate is the first code rate.

S409. The user equipment accesses the local cache of the user equipment, and finds the i+1th media segment whose code rate is the first code rate in the local cache of the user equipment, and plays the i+1th of the first code rate. Media clips.

S410. The server sends, to the user equipment, an i+2th media segment whose code rate is the first code rate.

Among them, when 1 ≤ i < N-1, S410 may be executed. When i=N-1, S410 is not executed.

S411. The user equipment accesses the local cache of the user equipment, and does not find the jth media segment whose code rate is the second code rate in the local buffer of the user equipment.

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

For example, the first code rate is 500 kbps and the second code rate is 1000 kbps. After the user equipment receives a plurality of media segments with a code rate of 500 kbps, if it detects that the current network condition is good (for example, the quality of the wireless channel of the user equipment is superior), the server is requested to send the media with a code rate of 1000 kbps. Fragments for a better user experience.

S412. The user equipment sends a second media transmission request to the server.

The second media transmission request carries the second segment information and the second code rate information, the second segment information is used to indicate that the requested media segment is the jth media segment, and the second rate information is used to indicate the requested media segment. The code rate is the second code rate.

S413. The server sends, to the user equipment, a jth media segment with a code rate of a second code rate according to the second media transmission request.

When the server receives the second media transmission request, if the media segment whose code rate is the first code rate is still being transmitted, the server terminates the transmission of the media segment whose code rate is the first code rate.

S414. The user equipment plays the jth media segment with the second bit rate.

It should be noted that, after S410, the server may further send, to the user equipment, a plurality of consecutive media segments with a code rate of a first code rate; after S413, the server may further send the code rate to the user equipment for a second code rate. The plurality of consecutive media segments are merely exemplified in the embodiment of the present invention, and do not limit the number of consecutive media segments that the server pushes to the user equipment.

The media stream transmission method provided by the embodiment of the present invention, after the server sends the ith media segment whose code rate is the first code rate to the user equipment according to the first media transmission request, the code rate is sent to the user equipment as the first code. The i+1th media segment of the rate does not need to wait for the request of the user equipment, therefore, the waiting in the process of the user equipment acquiring the i+1th media segment of the first code rate in the prior art can be reduced. The delay can improve the real-time performance of the user equipment to obtain the media stream file. If the code rate of the user equipment is changed, the server may send the media rate to the user equipment at a new code rate (the changed code rate, that is, the second code rate in this embodiment). Fragment. In addition, since the embodiment of the present invention adopts a method for actively sending by a server, no user is needed. The device sends the media transmission request multiple times, which can reduce the signaling burden between the devices compared with the prior art request-response message interaction.

This embodiment describes a media stream transmission method provided by an embodiment of the present invention from the perspective of interaction between a server, a DASH proxy entity, and a user equipment. As shown in FIG. 5, the media stream transmission method provided by the embodiment of the present invention includes:

S501: The server establishes an HTTP session connection with the DASH proxy entity, and the DASH proxy entity establishes an HTTP session connection with the user equipment.

S502. The DASH proxy entity sends a push function enable message to the server.

The push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the DASH proxy entity, that is, the server does not need to wait for the media transmission request message sent by the DASH proxy entity, and directly sends the media transfer request message to the DASH proxy entity. Send consecutive media segments of the same media stream file of the same code rate.

S503. The server sends an MPD file to the DASH proxy entity.

S504. The DASH proxy entity sends an MPD file to the user equipment.

S505. The user equipment accesses a local cache of the user equipment, and the i-th media segment is not found in the local cache of the user equipment.

S506. The user equipment sends a first media transmission request to the DASH proxy entity.

S507. If the DASH proxy entity does not cache the i-th media segment, the DASH proxy entity sends a first media transmission request to the server.

S508. The server sends, according to the first media transmission request, an ith media segment whose code rate is the first code rate to the DASH proxy entity.

Further, in the first scenario of the embodiment of the present invention, the server determines the first code rate according to the predefined policy, and sends the ith media segment whose code rate is the first code rate to the DASH proxy entity.

Further, in the second scenario of the embodiment of the present invention, the first media transmission request further carries the first rate information, where the first rate information is used to indicate that the code rate of the requested media segment is the first code rate. The server determines the first code rate according to the first code rate information, and sends the ith media segment whose code rate is the first code rate to the DASH proxy entity.

S509. The DASH proxy entity sends the ith media segment whose code rate is the first code rate to the user equipment.

S510. The user equipment plays the ith media segment of the first code rate.

S511. The server sends, to the DASH proxy entity, an i+1th media segment whose code rate is the first code rate.

Specifically, S511 may include: S511a and S511b.

S511a. The server determines, according to the playing duration of the i-th media segment, the first time, where the first time is the time when the (i+1)th media segment is sent.

The first moment may be a time earlier than or equal to the end of the ith media segment. For example, the playing time of the i-th media segment is 6 seconds. If the server sends the i-th media segment with the first bit rate to the DASH proxy entity in the first minute and 0 seconds, regardless of the transmission time of the i-th media segment. Then, the server can determine that the first time is any time between the first minute 0 seconds and the first minute 6 seconds.

S511b. The server sends, to the DASH proxy entity, the i+1th media segment whose code rate is the first code rate.

S512. The user equipment requests, from the DASH proxy entity, an i+1th media segment whose code rate is the first code rate.

S513. The DASH proxy entity sends, to the user equipment, an i+1th media segment whose code rate is the first code rate.

Since the server has previously sent the i+1th media segment whose code rate is the first code rate to the DASH proxy entity, when the user equipment requests the DASH proxy entity for the i+1th media segment whose code rate is the first code rate. The DASH proxy entity may send the i+1th media segment whose buffered code rate is the first code rate to the user equipment, which reduces the i+ of the first bit rate of the user equipment in the prior art. Waiting delay in the process of 1 media segment.

S514. The user equipment plays the i+1th media segment of the first code rate.

S515. The server sends, to the DASH proxy entity, an i+2 media segment whose code rate is the first code rate.

S516. The user equipment accesses the local cache of the user equipment, and does not find the jth media segment whose code rate is the second code rate in the local buffer of the user equipment.

S517. The user equipment sends a second media transmission request to the DASH proxy entity.

S518. If the DASH proxy entity does not cache the jth media segment with the second rate, the DASH proxy entity sends a second media transmission request to the server.

S519. The server sends, according to the second media transmission request, a jth media segment whose code rate is the second code rate to the DASH proxy entity.

S520. The DASH proxy entity sends the jth media segment with a code rate of the second code rate to the user equipment.

S521. The user equipment plays the j-th media segment with the second bit rate.

It should be noted that, after S515, the server may further send a plurality of consecutive media segments with a code rate of the first code rate to the DASH proxy entity; after S519, the server may further send the code rate to the DASH proxy entity for the second code. The plurality of consecutive media segments of the rate are only exemplified in the embodiment of the present invention, and do not limit the number of consecutive media segments sent by the server to the DASH proxy entity.

In the media stream transmission method provided by the embodiment of the present invention, the DASH server sends the i+1th media segment whose code rate is the first code rate to the DASH proxy entity, and therefore, when the user equipment requests the DASH proxy entity, the code rate is the first. The DASH proxy entity may send the cached code rate to the user equipment when the i+1th media segment of the code rate is the first. The i+1th media segment of the code rate reduces the waiting delay in the process of the user equipment acquiring the i+1th media segment of the first code rate in the prior art, and can improve the user equipment to obtain the media. The real-time nature of the stream file. In addition, the embodiment of the present invention adopts a method for actively sending by a server, and does not need to send a media transmission request multiple times by the DASH proxy entity, which can reduce signaling between devices compared with the method of interacting with the request-response message in the prior art. burden.

An embodiment of the present invention provides a server, as shown in FIG. 6, including: a receiving unit 61 and a sending unit 62.

The receiving unit 61 is configured to receive a first media transmission request sent by the downstream node, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the i-th of the media stream file to be transmitted. Media clips.

The sending unit 62 is configured to send, according to the first media transmission request, an ith media segment whose code rate is the first code rate to the downstream node.

The sending unit 62 is further configured to send, to the downstream node, an i+1th media segment whose code rate is the first code rate.

Further, as shown in FIG. 7, the server in the embodiment of the present invention further includes: a processing unit 63.

The processing unit 63 is configured to determine, according to the playing duration of the ith media segment, the first time, where the first time is the time when the (i+1)th media segment is sent.

The sending unit 62 is configured to send the i+1th media segment whose code rate is the first code rate to the downstream node at the first time.

Optionally, the processing unit 63 is further configured to determine, according to a predefined policy, the first code rate before the sending unit 62 sends the ith media segment whose code rate is the first code rate to the downstream node.

Optionally, the first media transmission request further carries the first rate information, where the first rate information is used to indicate that the code rate of the requested media segment is the first code rate.

The processing unit 63 is further configured to send the code rate to the downstream node at the sending unit 62. Before the i-th media segment of a code rate, the first code rate is determined according to the first code rate information.

Further, if 1≤i<N-1, the sending unit 62 is further configured to send the code rate to the downstream node after transmitting the i+1th media segment whose code rate is the first code rate to the downstream node. The i+2th media segment of a bit rate.

Further, the receiving unit 61 is further configured to receive a second media transmission request sent by the downstream node, where the second media transmission request carries the second segment information and the second code rate information, where the second segment information is used to indicate the requested media segment. For the jth media segment of the media stream file to be transmitted, 1 ≤ j ≤ N, j is a positive integer, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate, and the second code rate Different from the first code rate.

The sending unit 62 is further configured to send, according to the second media transmission request, the jth media segment whose code rate is the second code rate to the downstream node.

Further, the processing unit 63 is further configured to: before the receiving unit 61 receives the first media transmission request sent by the downstream node, the control server establishes an HTTP session connection with the downstream node.

The receiving unit 61 is further configured to receive a push function enable message sent by the downstream node, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the downstream node.

Optionally, the downstream node is a user equipment; or the downstream node is a DASH proxy entity.

It should be noted that the specific description of some of the functional modules in the server provided by the embodiment of the present invention may refer to the corresponding content in the method embodiment, and details are not described in detail in this embodiment.

In the server provided by the embodiment of the present invention, after the server sends the ith media segment whose code rate is the first code rate to the downstream node according to the first media transmission request, the server sends the code rate to the downstream node at the first code rate. i+1 media segments without waiting for the request of the downstream node, therefore, the waiting delay in the process of obtaining the i+1th media segment of the first code rate by the downstream node in the prior art can be reduced. It can improve the real-time performance of the downstream node to obtain the media stream file. In addition, since the embodiment of the present invention adopts a method for actively sending by a server, the downstream node does not need to send the request multiple times, which is related to the prior art. Compared to the way the request-response message interacts, the signaling burden between devices can be reduced.

The embodiment of the present invention further provides a user equipment, as shown in FIG. 8, comprising: a sending unit 71 and a receiving unit 72.

The sending unit 71 is configured to send a first media transmission request to the server, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the i-th media of the media stream file to be transmitted. Fragment.

The receiving unit 72 is configured to receive, by the server, an ith media segment whose code rate is the first code rate.

The receiving unit 72 is further configured to receive, by the server, an i+1th media segment whose code rate is the first code rate.

Further, as shown in FIG. 9, the user equipment in the embodiment of the present invention further includes: a processing unit 73.

The processing unit 73 is configured to access the local cache of the user equipment before the sending unit 71 sends the first media transmission request to the server, and does not find the i-th media segment in the local cache of the user equipment.

Further, as shown in FIG. 10, the user equipment in the embodiment of the present invention further includes: a playing unit 74.

The playing unit 74 is configured to: after the receiving unit 72 receives the ith media segment whose code rate is the first code rate, the playing rate is the ith media segment of the first code rate.

The processing unit 73 is further configured to: after receiving, by the receiving unit 72, the i+1th media segment whose code rate is the first code rate, accessing the local cache of the user equipment, and searching for the code in the local buffer of the user equipment. The rate is the i+1th media segment of the first code rate.

The playing unit 74 is further configured to play the i+1th media segment whose code rate is the first code rate.

Further, the first media transmission request further carries the first rate information, where the first rate information is used to indicate that the code rate of the requested media segment is the first code rate.

Further, if 1≤i<N-1, the receiving unit 72 is further configured to: after the i+1th media segment of the first code rate sent by the receiving server is sent, the receiving server sends the code rate The i+2th media segment of a bit rate.

Further, the processing unit 73 is further configured to access a local cache of the user equipment, and does not find the jth media segment whose code rate is the second code rate in the local buffer of the user equipment, where 1≤j≤N,j is A positive integer, the second code rate is different from the first code rate.

The sending unit 71 is further configured to send a second media transmission request to the server, where the second media transmission request carries the second segment information and the second rate information, where the second segment information is used to indicate that the requested media segment is the jth media The fragment, the second rate information is used to indicate that the code rate of the requested media segment is the second code rate.

The receiving unit 72 is further configured to receive, by the server, a j-th media segment whose code rate is a second code rate.

The playing unit 74 is further configured to play the jth media segment whose code rate is the second code rate.

Further, the processing unit 73 is further configured to control the user equipment to establish an HTTP session connection with the server before the sending unit 71 sends the first media transmission request to the server.

The sending unit 71 is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the user equipment.

It should be noted that the specific description of some of the functional modules in the user equipment provided by the embodiment of the present invention may be referred to the corresponding content in the method embodiment, which is not described in detail in this embodiment.

According to the user equipment provided by the embodiment of the present invention, after the user equipment receives the ith media segment whose code rate is the first code rate, and does not need to request the server again, the code rate sent by the server may be the first code rate. The i+1th media segment can reduce the waiting delay in the process of the user equipment acquiring the i+1th media segment of the first bit rate, and can improve the user equipment to obtain the media. The real-time nature of the stream file. In addition, the embodiment of the present invention adopts a method for the server to actively send, and does not require the user equipment to send the request multiple times, and interacts with the request-response message in the prior art. Compared with the way, the signaling burden between devices can be alleviated.

The embodiment of the present invention further provides a DASH proxy entity, as shown in FIG. 11, comprising: a receiving unit 81 and a sending unit 82.

The receiving unit 81 is configured to receive a first media transmission request sent by the user equipment, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the i th of the media stream file to be transmitted. Media clips.

The sending unit 82 is configured to send a first media transmission request to the server if the DASH proxy entity does not cache the i-th media segment.

The receiving unit 81 is further configured to receive, by the server, an ith media segment whose code rate is the first code rate.

The sending unit 82 is further configured to send, to the user equipment, an ith media segment whose code rate is the first code rate.

The receiving unit 81 is further configured to receive, by the server, an i+1th media segment whose code rate is the first code rate.

Further, the receiving unit 81 is further configured to: if 1≤i<N-1, the code rate sent by the receiving server is after the i+1th media segment of the first code rate sent by the receiving server The i+2th media segment of a bit rate.

Further, the receiving unit 81 is further configured to receive a second media transmission request sent by the user equipment, where the second media transmission request carries the second segment information and the second rate information, where the second segment information is used to indicate the requested media segment. For the jth media segment of the media stream file to be transmitted, 1 ≤ j ≤ N, j is a positive integer, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate, and the second code rate Different from the first code rate.

The sending unit 82 is further configured to: if the DASH proxy entity does not cache the jth media segment with the second rate, the second media transmission request is sent to the server.

The receiving unit 81 is further configured to receive the jth rate of the second bit rate sent by the server. Media clips.

The sending unit 82 is further configured to send, to the user equipment, a jth media segment whose code rate is the second code rate.

Further, as shown in FIG. 12, the DASH proxy entity in the embodiment of the present invention further includes: a processing unit 83.

The processing unit 83 is configured to control the DASH proxy entity to establish an HTTP session connection with the user equipment before the receiving unit 81 receives the first media transmission request sent by the user equipment, and control the DASH proxy entity to establish an HTTP session connection with the server.

The sending unit 82 is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the DASH proxy entity.

It should be noted that the specific description of some functional modules in the DASH proxy entity provided by the embodiment of the present invention may be referred to the corresponding content in the method embodiment, and details are not described in detail in this embodiment.

The DASH proxy entity provided by the embodiment of the present invention can receive the first bit rate of the first bit rate after the DASH proxy entity receives the ith media segment of the first code rate, and the received code rate of the receiving server is the first. The i+1th media segment of the code rate, therefore, can reduce the waiting delay in the process of the DASH proxy entity acquiring the i+1th media segment of the first code rate in the prior art. When the user equipment needs to obtain the i+1th media segment whose code rate is the first code rate, since the DASH proxy entity has cached the i+1th media segment of the first code rate, the user equipment acquires the code. The waiting delay in the process of the i+1th media segment of the first code rate is also reduced, so that the real-time performance of the user equipment to obtain the media stream file can be improved. In addition, the embodiment of the present invention adopts a method for the server to actively send, and does not require the DASH proxy entity to send the request multiple times. Compared with the manner of the request-response message in the prior art, the signaling burden between the devices can be alleviated.

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

The receiver 91 is configured to receive a first media transmission request sent by the downstream node, where The media segment request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the i-th media segment of the media stream file to be transmitted.

The transmitter 92 is configured to send, according to the first media transmission request, an ith media segment whose code rate is the first code rate to the downstream node.

The transmitter 92 is further configured to send, to the downstream node, an i+1th media segment whose code rate is the first code rate.

Further, as shown in FIG. 14, the server in the embodiment of the present invention further includes: a processor 93.

The processor 93 is configured to determine, according to the playing duration of the ith media segment, the first time, where the first time is the time when the (i+1)th media segment is sent.

The transmitter 92 is configured to send the i+1th media segment whose code rate is the first code rate to the downstream node at the first time.

Optionally, the processor 93 is further configured to determine, according to a predefined policy, the first code rate before the transmitter 92 sends the i-th media segment whose code rate is the first code rate to the downstream node.

The processor 93 is further configured to determine the first code rate according to the first code rate information before the transmitter 92 sends the ith media segment whose code rate is the first code rate to the downstream node.

Further, if 1 ≤ i < N-1, the transmitter 92 is further configured to send the code rate to the downstream node after transmitting the i+1th media segment whose code rate is the first code rate to the downstream node. The i+2th media segment of a bit rate.

Further, the receiver 91 is further configured to receive a second media transmission request sent by the downstream node, where the second media transmission request carries the second segment information and the second rate information, where the second segment information is used to indicate the requested media segment. For the jth media segment of the media stream file to be transmitted, 1 ≤ j ≤ N, j is a positive integer, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate, and the second code rate Different from the first code rate.

The transmitter 92 is further configured to send, according to the second media transmission request, the jth media segment whose code rate is the second code rate to the downstream node.

Further, the processor 93 is further configured to: before the receiver 91 receives the first media transmission request sent by the downstream node, the control server establishes an HTTP session connection with the downstream node.

The receiver 91 is further configured to receive a push function enable message sent by the downstream node, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the downstream node.

In the server provided by the embodiment of the present invention, after the server sends the ith media segment whose code rate is the first code rate to the downstream node according to the first media transmission request, the server sends the code rate to the downstream node at the first code rate. i+1 media segments without waiting for the request of the downstream node, therefore, the waiting delay in the process of obtaining the i+1th media segment of the first code rate by the downstream node in the prior art can be reduced. It can improve the real-time performance of the downstream node to obtain the media stream file. In addition, the embodiment of the present invention adopts a method for the server to actively send, and does not require the downstream node to send the request multiple times. Compared with the manner of the request-response message in the prior art, the signaling burden between the devices can be alleviated.

The embodiment of the invention further provides a user equipment, as shown in FIG. 15, comprising: a transmitter A1 and a receiver A2.

The sender A1 is configured to send a first media transmission request to the server, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the i-th media of the media stream file to be transmitted. Fragment.

The receiver A2 is configured to receive an ith media segment that is sent by the server and has a first rate.

The receiver A2 is further configured to receive the i+1 of the first code rate sent by the server. Media clips.

Further, as shown in FIG. 16, the user equipment in the embodiment of the present invention further includes: a processor A3.

The processor A3 is configured to access the local cache of the user equipment before the sender A1 sends the first media transmission request to the server, and does not find the i-th media segment in the local cache of the user equipment.

Further, as shown in FIG. 17, the user equipment in the embodiment of the present invention further includes: a player A4.

The player A4 is configured to play the ith media segment of the first code rate after the receiver A2 receives the ith media segment of the first code rate sent by the server.

The processor A3 is further configured to: after the receiver A2 receives the i+1th media segment that is sent by the server and is the first code rate, access the local cache of the user equipment, and find the code in the local cache of the user equipment. The rate is the i+1th media segment of the first code rate.

The player A4 is further configured to play the i+1th media segment whose code rate is the first code rate.

Further, if 1≤i<N-1, the receiver A2 is further configured to: after the i+1th media segment of the first code rate sent by the receiving server, the receiving server sends the code rate The i+2th media segment of a bit rate.

Further, the processor A3 is further configured to access a local cache of the user equipment, and the jth media segment whose code rate is the second code rate is not found in the local buffer of the user equipment, where 1≤j≤N,j is A positive integer, the second code rate is different from the first code rate.

The transmitter A1 is further configured to send a second media transmission request to the server, where the second media transmission request carries the second segment information and the second rate information, where the second segment information is used to indicate that the requested media segment is the jth media The fragment, the second rate information is used to indicate that the code rate of the requested media segment is the second code rate.

The receiver A2 is further configured to receive the jth rate of the second rate rate sent by the server. Media clips.

The player A4 is further configured to play the jth media segment whose code rate is the second code rate.

Further, the processor A3 is further configured to control the user equipment to establish an HTTP session connection with the server before the sender A1 sends the first media transmission request to the server.

The sender A1 is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the user equipment.

According to the user equipment provided by the embodiment of the present invention, after the user equipment receives the ith media segment whose code rate is the first code rate, and does not need to request the server again, the code rate sent by the server may be the first code rate. The i+1th media segment can reduce the waiting delay in the process of the user equipment acquiring the i+1th media segment of the first bit rate, and can improve the user equipment to obtain the media. The real-time nature of the stream file. In addition, the embodiment of the present invention adopts a method for the server to actively send, and does not require the user equipment to send the request multiple times. Compared with the manner of the request-response message in the prior art, the signaling burden between the devices can be alleviated.

The embodiment of the present invention further provides a DASH proxy entity, as shown in FIG. 18, including: a receiver B1 and a transmitter B2.

The receiver B1 is configured to receive a first media transmission request sent by the user equipment, where the first media transmission request carries the first fragment information, where the first fragment information is used to indicate that the requested media segment is the i-th of the media stream file to be transmitted. Media clips.

The sender B2 is configured to send a first media transmission request to the server if the DASH proxy entity does not cache the i-th media segment.

The receiver B1 is further configured to receive an ith media segment that is sent by the server and has a code rate of a first code rate.

The transmitter B2 is further configured to send, to the user equipment, an ith media segment whose code rate is the first code rate.

The receiver B1 is further configured to receive, by the server, an i+1th media segment whose code rate is the first code rate.

Further, the receiver B1 is further configured to: if 1≤i<N-1, the code rate sent by the receiving server is after the i+1th media segment of the first code rate sent by the receiving server The i+2th media segment of a bit rate.

Further, the receiver B1 is further configured to receive a second media transmission request sent by the user equipment, where the second media transmission request carries the second segment information and the second rate information, where the second segment information is used to indicate the requested media segment. For the jth media segment of the media stream file to be transmitted, 1 ≤ j ≤ N, j is a positive integer, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate, and the second code rate Different from the first code rate.

The transmitter B2 is further configured to send a second media transmission request to the server if the DASH proxy entity does not cache the jth media segment with the second rate.

The receiver B1 is further configured to receive the jth media segment sent by the server and having a second rate.

The transmitter B2 is further configured to send, to the user equipment, a jth media segment whose code rate is the second code rate.

Further, as shown in FIG. 19, the DASH proxy entity in the embodiment of the present invention further includes: a processor B3.

The processor B3 is configured to control the DASH proxy entity to establish an HTTP session connection with the user equipment, and control the DASH proxy entity to establish an HTTP session connection with the server, before the receiver B1 receives the first media transmission request sent by the user equipment.

The sender B2 is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the DASH proxy entity.

It should be noted that some functions in the DASH proxy entity provided by the embodiments of the present invention are required. For a detailed description of the energy module, refer to the corresponding content in the method embodiment, which is not described in detail in this embodiment.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is illustrated. In practical applications, the above functions can be allocated according to needs. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the system, the device and the unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviation: ROM), a random access memory (English: Random Access Memory, abbreviation: RAM), a magnetic disk or an optical disk, and the like. A variety of media that can store program code.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A media stream transmission method, comprising:

The server receives the first media transmission request sent by the downstream node, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the ith of the media stream file to be transmitted. Media clip

Sending, by the server, the i th media segment with a code rate of a first code rate to the downstream node according to the first media transmission request;

Sending, by the server, the i+1th media segment whose code rate is the first code rate to the downstream node;

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i and N are positive integers.
The method according to claim 1, wherein the server sends the i+1th media segment whose code rate is the first code rate to the downstream node, including:

Determining, by the server, a first time according to a playing duration of the i-th media segment, where the first time is a time for sending the (i+1)th media segment;

Sending, by the server, the i+1th media segment whose code rate is the first code rate to the downstream node at the first time.
The method according to claim 1 or 2, wherein the server sends the i-th media segment having a code rate of a first code rate to the downstream node according to the first media transmission request, including :

Determining, by the server, the first code rate according to a predefined policy;

The server sends the i-th media segment whose code rate is the first code rate to the downstream node.
The method according to claim 1 or 2, wherein the first media transmission request further carries first code rate information, where the first code rate information is used to indicate a code rate of the requested media segment. The first code rate;

Sending, by the server, the ith media segment with a code rate of the first code rate to the downstream node according to the first media transmission request, including:

Determining, by the server, the first code rate according to the first code rate information;

The server sends the i-th media segment whose code rate is the first code rate to the downstream node.
The method according to any one of claims 1 to 4, wherein if 1 ≤ i < N-1, the server transmits a code rate to the downstream node at a rate of the first code rate. After i+1 media segments, the method further includes:

The server sends the i+2th media segment whose code rate is the first code rate to the downstream node.
The method according to any one of claims 1 to 5, wherein the method further comprises:

The server receives the second media transmission request sent by the downstream node, where the second media transmission request carries the second segment information and the second rate information, where the second segment information is used to indicate that the requested media segment is The j-th media segment of the media stream file to be transmitted, 1≤j≤N,j is a positive integer, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate. The second code rate is different from the first code rate;

And the server sends, according to the second media transmission request, the jth media segment whose code rate is the second code rate to the downstream node.
The method according to any one of claims 1 to 6, wherein before the server receives the first media transmission request sent by the downstream node, the method further includes:

The server establishes a hypertext transfer protocol HTTP session connection with the downstream node;

The server receives a push function enable message sent by the downstream node, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the downstream node.
The method according to any one of claims 1 to 7, wherein the downstream node is a user equipment; or the downstream node is a hypertext transfer protocol dynamic adaptive stream DASH proxy entity.
A media stream transmission method, comprising:

The user equipment sends a first media transmission request to the server, where the first media transmission is requested The first fragment information is used to indicate that the requested media segment is the i-th media segment of the media stream file to be transmitted;

Receiving, by the user equipment, the ith media segment that is sent by the server to a first code rate;

Receiving, by the user equipment, an i+1th media segment that is sent by the server and having a code rate of the first code rate;

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i and N are positive integers.
The method according to claim 9, wherein before the sending, by the user equipment, the first media transmission request to the server, the method further comprises:

The user equipment accesses the local cache of the user equipment, and the i-th media segment is not found in the local cache of the user equipment.
The method according to claim 9 or 10, wherein after the user equipment receives the ith media segment that is sent by the server and the code rate is the first code rate, the method further includes:

The user equipment plays a code rate of the ith media segment of the first code rate;

After the user equipment receives the (i+1)th media segment that is sent by the server and the code rate is the first code rate, the method further includes:

The user equipment accesses a local cache of the user equipment, and finds, in a local cache of the user equipment, an i+1th media segment whose code rate is the first code rate, and the play rate is the number The i+1th media segment of a bit rate.
The method according to any one of claims 9-11, wherein the first media transmission request further carries first code rate information, where the first code rate information is used to indicate the requested media segment. The code rate is the first code rate.
The method according to any one of claims 9 to 12, wherein if 1≤i<N-1, the user equipment receives the code rate sent by the server as the first code rate. After the i+1th media segment, the method further includes:

The user equipment receives an i+2th media segment whose code rate sent by the server is the first code rate.
The method according to any one of claims 9 to 13, wherein the method further comprises:

The user equipment accesses the local cache of the user equipment, and does not find the jth media segment whose code rate is the second code rate in the local buffer of the user equipment, where 1≤j≤N, j is a positive integer. The second code rate is different from the first code rate;

The user equipment sends a second media transmission request to the server, where the second media transmission request carries the second fragment information and the second rate information, where the second fragment information is used to indicate that the requested media segment is The jth media segment, the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate;

The user equipment receives the jth media segment sent by the server and the code rate is the jth media segment of the second code rate.
The method according to any one of claims 9 to 14, wherein before the user equipment sends a first media transmission request to the server, the method further includes:

The user equipment establishes a hypertext transfer protocol HTTP session connection with the server;

The user equipment sends a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the user equipment.
A media stream transmission method, comprising:

The hypertext transfer protocol dynamic adaptive stream DASH proxy entity receives the first media transmission request sent by the user equipment, where the first media transmission request carries the first fragment information, where the first fragment information is used to indicate that the requested media segment is The i-th media segment of the media stream file to be transmitted;

If the DASH proxy entity does not cache the i-th media segment, the DASH proxy entity sends the first media transmission request to the server;

The DASH proxy entity receives the ith media segment of the first code rate sent by the server, and sends the code rate to the user equipment to the first code rate. The ith media segment;

The DASH proxy entity receives an i+1th media segment of the first code rate sent by the server;

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i, N are positive integers.
The method according to claim 16, wherein the first media transmission request further carries first code rate information, where the first code rate information is used to indicate that a code rate of the requested media segment is the first One bit rate.
The method according to claim 16 or 17, wherein if 1 ≤ i < N-1, the code rate transmitted by the server is received by the DASH proxy entity as the i+ of the first code rate. After one media segment, the method further includes:

The DASH proxy entity receives the i+2th media segment that the code rate sent by the server is the first code rate.
The method according to any one of claims 16 to 18, wherein the method further comprises:

The DASH proxy entity receives the second media transmission request sent by the user equipment, where the second media transmission request carries the second fragment information and the second rate information, where the second fragment information is used to indicate the requested media. The fragment is the j-th media segment of the media stream file to be transmitted, 1≤j≤N, j is a positive integer, and the second rate information is used to indicate that the code rate of the requested media segment is the second code rate. The second code rate is different from the first code rate;

And if the DASH proxy entity does not cache the jth media segment with a code rate of the second code rate, the DASH proxy entity sends the second media transmission request to the server;

Receiving, by the DASH proxy entity, the jth media segment sent by the server with the code rate of the second code rate, and transmitting, to the user equipment, the code rate of the jth rate of the second code rate Media clips.
The method according to any one of claims 16 to 19, wherein before the DASH proxy entity receives the first media transmission request sent by the user equipment, The method also includes:

The DASH proxy entity establishes a hypertext transfer protocol HTTP session connection with the user equipment, and the DASH proxy entity establishes an HTTP session connection with the server;

The DASH proxy entity sends a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media segments of the same media stream file of the same code rate to the DASH proxy entity.
A server, comprising:

The receiver is configured to receive a first media transmission request sent by the downstream node, where the first media transmission request carries the first segment information, where the first segment information is used to indicate that the requested media segment is the media stream file to be transmitted. The i-th media segment;

a transmitter, configured to send, according to the first media transmission request, the i th media segment with a code rate of a first code rate to the downstream node;

The transmitter is further configured to send, to the downstream node, an i+1th media segment whose code rate is the first code rate;

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i and N are positive integers.
The server according to claim 21, wherein the server further comprises:

a processor, configured to determine a first time according to a playing duration of the i-th media segment, where the first time is a time when the (i+1)th media segment is sent;

The transmitter is configured to send the i+1th media segment whose code rate is the first code rate to the downstream node at the first time.
The server according to claim 21 or 22, wherein the processor is further configured to send, at the sender, the i-th media with a code rate of the first code rate to the downstream node. Prior to the segment, the first code rate is determined according to a predefined strategy.
The server according to claim 21 or 22, wherein the first media transmission request further carries first code rate information, where the first code rate information is used to indicate a code rate of the requested media segment. The first code rate;

The processor is further configured to send, at the sender, a code rate to the downstream node Before the ith media segment of the first code rate, the first code rate is determined according to the first code rate information.
The server according to any one of claims 21 to 24, wherein, if 1 ≤ i < N-1, the transmitter is further configured to send a code rate to the downstream node. After the i+1th media segment of the code rate, the i+2th media segment whose code rate is the first code rate is sent to the downstream node.
The server according to any one of claims 21 to 25, wherein the receiver is further configured to receive a second media transmission request sent by the downstream node, where the second media transmission request carries a second a second segment information and a second code rate information, where the second segment information is used to indicate that the requested media segment is the jth media segment of the media stream file to be transmitted, where 1≤j≤N, j is a positive integer. The second code rate information is used to indicate that a code rate of the requested media segment is a second code rate, and the second code rate is different from the first code rate;

The transmitter is further configured to send, according to the second media transmission request, the jth media segment whose code rate is the second code rate to the downstream node.
The server according to any one of claims 21 to 26, wherein the processor is further configured to control the server and the server before the receiver receives the first media transmission request sent by the downstream node. Said downstream node establishes a hypertext transfer protocol HTTP session connection;

The receiver is further configured to receive a push function enable message sent by the downstream node, where the push function enable message is used to instruct the server to send the same media stream file of the same code rate to the downstream node. Media clips.
The server according to any one of claims 21 to 27, wherein the downstream node is a user equipment; or the downstream node is a hypertext transfer protocol dynamic adaptive stream DASH proxy entity.
A user equipment, comprising:

a transmitter, configured to send a first media transmission request to the server, where the first media transmission request carries a first segment information, where the first segment information is used to indicate that the requested media segment is a media stream file to be transmitted. i media clips;

a receiver, configured to receive the ith of the first code rate sent by the server Media clips;

The receiver is further configured to receive an i+1th media segment of the first code rate sent by the server;

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i and N are positive integers.
The user equipment according to claim 29, wherein the user equipment further comprises:

And a processor, configured to access a local cache of the user equipment, and not find the i-th media segment in a local cache of the user equipment, before the sender sends the first media transmission request to the server.
The user equipment according to claim 29 or 30, wherein the user equipment further comprises:

a player, after the receiver receives the ith media segment that is sent by the server and has a code rate of a first code rate, playing the ith media of the first code rate Fragment

The processor is further configured to: after receiving, by the receiver, the i+1th media segment of the first code rate sent by the server, accessing a local cache of the user equipment, and Finding an i+1th media segment whose code rate is the first code rate in a local cache of the user equipment;

The player is further configured to play the i+1th media segment whose code rate is the first code rate.
The user equipment according to any one of claims 29 to 31, wherein the first media transmission request further carries first code rate information, where the first code rate information is used to indicate the requested media segment. The code rate is the first code rate.
The user equipment according to any one of claims 29 to 32, wherein, if 1 ≤ i < N-1, the receiver is further configured to receive the code rate sent by the server After the i+1th media segment of the first code rate, the first and second media segments of the first code rate are received by the server.
User equipment according to any one of claims 29-33, characterized in that The processor is further configured to access a local cache of the user equipment, and not find a jth media segment whose code rate is a second code rate in a local cache of the user equipment, where 1≤j≤N, j is a positive integer, and the second code rate is different from the first code rate;

The transmitter is further configured to send a second media transmission request to the server, where the second media transmission request carries second segment information and second code rate information, where the second segment information is used to indicate the request The media segment is the jth media segment, and the second code rate information is used to indicate that the code rate of the requested media segment is the second code rate;

The receiver is further configured to receive the jth media segment that is sent by the server and the code rate is the second code rate;

The player is further configured to play the j-th media segment whose code rate is the second code rate.
The user equipment according to any one of claims 29 to 34, wherein the processor is further configured to control the user equipment and the device before the transmitter sends a first media transmission request to the server. Said server establishes a hypertext transfer protocol HTTP session connection;

The transmitter is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive media of the same media stream file of the same code rate to the user equipment. Fragment.
A hypertext transfer protocol dynamic adaptive stream DASH proxy entity, comprising:

a receiver, configured to receive a first media transmission request sent by the user equipment, where the first media transmission request carries a first fragment information, where the first fragment information is used to indicate that the requested media segment is a media stream file to be transmitted. The i-th media segment;

a transmitter, configured to send the first media transmission request to a server if the ith media segment is not cached by the DASH proxy entity;

The receiver is further configured to receive the ith media segment that is sent by the server to a first code rate;

The transmitter is further configured to send, to the user equipment, the i th media segment whose code rate is the first code rate;

The receiver is further configured to receive an i+1th media segment of the first code rate sent by the server;

The media stream file to be transmitted is divided into N consecutive media segments, and 1≤i<N, i, N are positive integers.
The DASH proxy entity according to claim 36, wherein the first media transmission request further carries first code rate information, where the first code rate information is used to indicate a code rate of the requested media segment. The first code rate is described.
The DASH proxy entity according to claim 36 or 37, wherein the receiver is further configured to: when 1 ≤ i < N-1, receive a code rate sent by the server as the first code After the i+1th media segment of the rate, the first and second media segments of the first code rate are received by the server.
The DASH proxy entity according to any one of claims 36 to 38, wherein the receiver is further configured to receive a second media transmission request sent by the user equipment, where the second media transmission request is Carrying the second fragment information and the second rate information, where the second fragment information is used to indicate that the requested media segment is the jth media segment of the media stream file to be transmitted, 1≤j≤N, j is positive An integer, the second code rate information is used to indicate that a code rate of the requested media segment is a second code rate, and the second code rate is different from the first code rate;

The transmitter is further configured to: if the DASH proxy entity does not cache the jth media segment with a code rate of the second code rate, send the second media transmission request to the server;

The receiver is further configured to receive the jth media segment that is sent by the server and the code rate is the second code rate;

The transmitter is further configured to send, to the user equipment, the jth media segment whose code rate is the second code rate.
The DASH proxy entity according to any one of claims 36 to 39, wherein the DASH proxy entity further comprises:

a processor, configured to control the DASH proxy entity to establish a hypertext transfer protocol with the user equipment before the receiver receives the first media transmission request sent by the user equipment Discussing an HTTP session connection, and controlling the DASH proxy entity to establish an HTTP session connection with the server;

The transmitter is further configured to send a push function enable message to the server, where the push function enable message is used to instruct the server to send consecutive contiguous media stream files of the same code rate to the DASH proxy entity. Media clips.