CA3026535C - Multimedia resource synchronous pushing method based on heterogeneous network - Google Patents
Multimedia resource synchronous pushing method based on heterogeneous network Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 11
- 230000011664 signaling Effects 0.000 claims description 13
- 230000001934 delay Effects 0.000 claims description 11
- 230000006866 deterioration Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 239000000872 buffer Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001343 mnemonic effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
- H04N21/64738—Monitoring network characteristics, e.g. bandwidth, congestion level
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64746—Control signals issued by the network directed to the server or the client
- H04N21/64761—Control signals issued by the network directed to the server or the client directed to the server
- H04N21/64769—Control signals issued by the network directed to the server or the client directed to the server for rate control
Abstract
Disclosed is a multimedia resource synchronous pushing method based on a heterogeneous network, comprising: step one, a serving end learning end-to-end broadband network delay information or broadband network delay and available broadband information about different users; step two, after receiving a user request, the serving end calculating, according to the end-to-end broadband network delay or broadband network delay and available broadband information about different users, a moment when multimedia resources can be synchronously presented; and step three, the serving end sending the multimedia resources capable of being synchronously presented at the moment, and a user end synchronously playing contents according to a starting presentation time of media resources, so that broadband contents of different users can be synchronously presented. The present invention solves the problem of a broadcast and a broadband user media resource not being synchronized due to different network conditions during heterogeneous network transmission.
Description
MULTIMEDIA RESOURCE SYNCHRONOUS PUSHING METHOD BASED ON
HETEROGENEOUS NETWORK
BACKGROUND
Technical Field The present invention relates to a heterogeneous media network transmission method in the field of information technologies, and in particular, to a method for synchronously pushing a multimedia resource based on a heterogeneous network.
Related Art With the rapid development of network technologies, the media presentation manner has undergone earth-shaking changes, and new forms of media have emerged one after another. Traditional TV is no longer the main way for people to obtain information and entertainment. More terminal devices appear, such as PCs connected to the Internet, mobile phones belonging to almost everybody, and mobile tablet computers that are becoming increasingly popular. These new products have started to slowly erode the market of traditional TV services. The multimedia services, along with the development of ever-changing mobile communication and broadband wireless technologies, are becoming increasingly mature. Large-scale media convergence has become an inevitable trend. In this process, new ideas and high-end products are constantly appearing, enabling users to conveniently access the network, so as to enjoy richer media content and diversified services with ease.
At the same time, the presentation of media content is no longer only simple audios, audios, and subtitles, and media types will be increasingly diversified. Media sources are no longer only specific content providers, and a growing number of producers are involved, including many individual users who are also content providers and producers.
The content from different providers has various associations. To meet the individualized needs of different users, the associated content usually needs to be synchronously presented. In this environment, heterogeneous network convergence is used as an inevitable trend in the development of next-generation networks, and this fully demonstrates that future communication is no longer a specific access technology, but instead, multiple access technologies coexist and work together.
In the environment of a heterogeneous media network, the media content presented by a terminal may be simultaneously transmitted from a plurality of transmission channels, for example, a broadcast channel and a broadband channel. Media resources of the broadcast channel have the characteristics of a short delay (basically neglected), a large bandwidth and high stability, and bandwidths and network delays greatly vary for different broadband channels (WIFI, 3G/4G, or the like).
Therefore, in a heterogeneous network media resource service formed by a broadcast and a broadband, due to the difference in the status of broadband channel networks, there are three cases of asynchronization: a server pushes media content to users through broadcast; if the users request for broadband resources of the same media content, the delay and bandwidth of the broadband network may cause the content received by the client from the broadcast and the broadband to be asynchronous on a timeline; the server pushes the same media content to users through broadcast and broadband; if the users request to replace a broadband resource media stream (for example, different view angles or different audios), when the media stream is switched, because different broadband networks have different delays and bandwidths, new bandwidth content and broadcast content of the terminal are asynchronous; the server pushes the same media content to users through broadcast and broadband; if the broadband network condition becomes poorer at a particular moment, the broadband channel play is not smooth, and when the video is played again smoothly, broadcast and broadband resources between different users are asynchronous.
Therefore, how to enable the server to synchronously transmit a multimedia resource according to a network condition in a new-generation heterogeneous network transmission system has become a problem urgently needing to be resolved.
SUMMARY
The technical problem to be resolved by the present invention is to provide a method
HETEROGENEOUS NETWORK
BACKGROUND
Technical Field The present invention relates to a heterogeneous media network transmission method in the field of information technologies, and in particular, to a method for synchronously pushing a multimedia resource based on a heterogeneous network.
Related Art With the rapid development of network technologies, the media presentation manner has undergone earth-shaking changes, and new forms of media have emerged one after another. Traditional TV is no longer the main way for people to obtain information and entertainment. More terminal devices appear, such as PCs connected to the Internet, mobile phones belonging to almost everybody, and mobile tablet computers that are becoming increasingly popular. These new products have started to slowly erode the market of traditional TV services. The multimedia services, along with the development of ever-changing mobile communication and broadband wireless technologies, are becoming increasingly mature. Large-scale media convergence has become an inevitable trend. In this process, new ideas and high-end products are constantly appearing, enabling users to conveniently access the network, so as to enjoy richer media content and diversified services with ease.
At the same time, the presentation of media content is no longer only simple audios, audios, and subtitles, and media types will be increasingly diversified. Media sources are no longer only specific content providers, and a growing number of producers are involved, including many individual users who are also content providers and producers.
The content from different providers has various associations. To meet the individualized needs of different users, the associated content usually needs to be synchronously presented. In this environment, heterogeneous network convergence is used as an inevitable trend in the development of next-generation networks, and this fully demonstrates that future communication is no longer a specific access technology, but instead, multiple access technologies coexist and work together.
In the environment of a heterogeneous media network, the media content presented by a terminal may be simultaneously transmitted from a plurality of transmission channels, for example, a broadcast channel and a broadband channel. Media resources of the broadcast channel have the characteristics of a short delay (basically neglected), a large bandwidth and high stability, and bandwidths and network delays greatly vary for different broadband channels (WIFI, 3G/4G, or the like).
Therefore, in a heterogeneous network media resource service formed by a broadcast and a broadband, due to the difference in the status of broadband channel networks, there are three cases of asynchronization: a server pushes media content to users through broadcast; if the users request for broadband resources of the same media content, the delay and bandwidth of the broadband network may cause the content received by the client from the broadcast and the broadband to be asynchronous on a timeline; the server pushes the same media content to users through broadcast and broadband; if the users request to replace a broadband resource media stream (for example, different view angles or different audios), when the media stream is switched, because different broadband networks have different delays and bandwidths, new bandwidth content and broadcast content of the terminal are asynchronous; the server pushes the same media content to users through broadcast and broadband; if the broadband network condition becomes poorer at a particular moment, the broadband channel play is not smooth, and when the video is played again smoothly, broadcast and broadband resources between different users are asynchronous.
Therefore, how to enable the server to synchronously transmit a multimedia resource according to a network condition in a new-generation heterogeneous network transmission system has become a problem urgently needing to be resolved.
SUMMARY
The technical problem to be resolved by the present invention is to provide a method
2 for synchronously pushing a multimedia resource based on a heterogeneous network, to implement a mechanism of synchronization between content of broadcast media and content of broadband media of a server in heterogeneous network transmission, thereby resolving the problem that user media resources of broadcast and broadband are asynchronous caused by different network conditions in heterogeneous network transmission.
The present invention resolves the foregoing technical problem by using the following technical solutions:
a method for synchronously pushing a multimedia resource based on a heterogeneous network, where the method is any one of the following two methods:
-method 1: including the following steps:
step 1, learning of, by a server, end-to-end broadband network delay information of different users;
step 2: after receiving a client request, calculating, by the server according to the end-to-end broadband network delay information of the different users, a moment at which the multimedia resource can be synchronously presented; and step 3: sending, by the server, the multimedia resource after the moment at which the multimedia resource can be synchronously presented, and synchronously playing, by a client, content according to a start presentation time of the multimedia resource, so that broadband content of the different users can be synchronously presented;
-method 2: including the following steps:
step 1: learning of, by a server, broadband network delay and available bandwidth information of different users;
step 2: after receiving a client request, calculating, by the server according to the broadband network delay and available bandwidth information of the different users, a moment at which the multimedia resource can be synchronously presented; and step 3: sending, by the server, the multimedia resource after the moment at which the
The present invention resolves the foregoing technical problem by using the following technical solutions:
a method for synchronously pushing a multimedia resource based on a heterogeneous network, where the method is any one of the following two methods:
-method 1: including the following steps:
step 1, learning of, by a server, end-to-end broadband network delay information of different users;
step 2: after receiving a client request, calculating, by the server according to the end-to-end broadband network delay information of the different users, a moment at which the multimedia resource can be synchronously presented; and step 3: sending, by the server, the multimedia resource after the moment at which the multimedia resource can be synchronously presented, and synchronously playing, by a client, content according to a start presentation time of the multimedia resource, so that broadband content of the different users can be synchronously presented;
-method 2: including the following steps:
step 1: learning of, by a server, broadband network delay and available bandwidth information of different users;
step 2: after receiving a client request, calculating, by the server according to the broadband network delay and available bandwidth information of the different users, a moment at which the multimedia resource can be synchronously presented; and step 3: sending, by the server, the multimedia resource after the moment at which the
3 multimedia resource can be synchronously presented, and notifying a client of a play start time of content of the multimedia resource, and synchronously presenting, by different clients, broadband content according to the play start time.
Further, in the step 2 of the method 1, when broadband network delays At of the users are different, the server sends, at a to moment, a multimedia resource at a tin, moment to ensure synchronization, where tin, is a start moment of a first complete independent decodable media unit MU after ttmp, where 0<tmi-ttmp<MU_duration ttmp=to+At in the formula, to is a sending moment, MU_duration is media unit duration, At is a downlink end-to-end broadband network delay, and ttmp is a moment that is obtained by calculation and at which the client receives the first independent decodable media unit MU.
Furthermore, in the method 1, a value of MU duration is: Os to 10s; and a value of dt is: 0 to co.
More preferably, in the method 1, the value of MU duration is: 0.5s; and the value of At is: 2s.
Further, in the step 3 of the method 1, content initially sent by the server is the multimedia resource after the tin, moment, and to enable a broadband and a broadcast to be synchronous, after receiving the first complete MU by using the broadband, the client does not immediately play the first MU, but instead, plays, at the tm, moment, the multimedia resource at this moment.
Further, in the method, the server sends the multimedia resource to the client, and the client synchronously plays the content according to the start presentation time of the media resource.
Further, in the step 2 of the method 1, when broadband network delays At of the users are different, the server sends, at a to moment, a multimedia resource at a tin, moment to ensure synchronization, where tin, is a start moment of a first complete independent decodable media unit MU after ttmp, where 0<tmi-ttmp<MU_duration ttmp=to+At in the formula, to is a sending moment, MU_duration is media unit duration, At is a downlink end-to-end broadband network delay, and ttmp is a moment that is obtained by calculation and at which the client receives the first independent decodable media unit MU.
Furthermore, in the method 1, a value of MU duration is: Os to 10s; and a value of dt is: 0 to co.
More preferably, in the method 1, the value of MU duration is: 0.5s; and the value of At is: 2s.
Further, in the step 3 of the method 1, content initially sent by the server is the multimedia resource after the tin, moment, and to enable a broadband and a broadcast to be synchronous, after receiving the first complete MU by using the broadband, the client does not immediately play the first MU, but instead, plays, at the tm, moment, the multimedia resource at this moment.
Further, in the method, the server sends the multimedia resource to the client, and the client synchronously plays the content according to the start presentation time of the media resource.
4 Further, in the step 2 of the method 2, when the broadband network delays At and available bandwidths Bb of the users are different, the server sends, at a to moment, a multimedia resource at a tot; moment to ensure synchronization, where tim is a start moment of a first complete independent decodable media unit MU after ttmp, where 0<tim-tcmp<MU_duration MU size=MU duration*Br ttmp=to+MU_size/Bb+At in the formula, to is a sending moment, MU_size is an average size of sent MUs, MU duration is media unit duration, Br is a constant bit rate at which the multimedia resource is played, Bb is an available bandwidth of a broadband network, At is a downlink broadband network delay, and ttmp is a moment that is obtained by calculation and at which the client receives a first independent decodable media unit MU.
Furthermore, in the method 2, a value of MU_size is: 0 Mbits to 100 Mbits;
a value of MU duration is: Os to 10s;
a value of Br is: 0 Mbps to 50 Mbps;
a value of Bb is: 0 Tbps to 1 Tbps; and a value of At is: 0 to co.
More preferably, in the method 2, the value of MU_size is: 30 Mbits;
the value of MU duration is: 0.5s;
the value of Br is: 25 Mbps;
the value of Bb is: 1 Mbps; and the value of At is: 2s.
Further, in the step 3 of the method 2, content initially sent by the server is the
Furthermore, in the method 2, a value of MU_size is: 0 Mbits to 100 Mbits;
a value of MU duration is: Os to 10s;
a value of Br is: 0 Mbps to 50 Mbps;
a value of Bb is: 0 Tbps to 1 Tbps; and a value of At is: 0 to co.
More preferably, in the method 2, the value of MU_size is: 30 Mbits;
the value of MU duration is: 0.5s;
the value of Br is: 25 Mbps;
the value of Bb is: 1 Mbps; and the value of At is: 2s.
Further, in the step 3 of the method 2, content initially sent by the server is the
5 multimedia resource after the tin, moment, and to enable a broadband and a broadcast to be synchronous, after receiving the first complete MU by using the broadband, the client does not immediately play the first MU, but instead, plays, at the tm, moment, the multimedia resource at this moment.
Further, in the method 2, when sending the multimedia resource, the server sends a piece of downlink signaling to notify the client of a sequence number of a sent first independent decodable media resource to notify a user of a play time.
Further, the method 1 and the method 2 are applicable to a case in which at a particular moment, different users in a heterogeneous network media service request the server for a same multimedia resource or switch different multimedia resources or re-request for a multimedia resource due to network deterioration caused by a lot of conditions, to make content of the media resources synchronously presented.
The positive progress effect of the present invention is:
By using the foregoing method of the present invention, the server adopts the method for synchronously pushing a media resource or adaptively accessing a synchronous media resource for conditions of broadband networks of different users, to implement a mechanism of synchronously playing content of broadcast media and content of broadband media of the server in heterogeneous network transmission, thereby resolving the problem that media resources are asynchronous caused by different network conditions.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic timing diagram of Embodiment 1 of the present invention;
and FIG. 2 is a schematic timing diagram of Embodiment 2 of the present invention.
DETAILED DESCRIPTION
The following provides preferred embodiments of the present invention with reference to the accompanying drawings, to describe the technical solutions of the present invention in detail.
Nowadays, diversified terminal presentation manners based on heterogeneous
Further, in the method 2, when sending the multimedia resource, the server sends a piece of downlink signaling to notify the client of a sequence number of a sent first independent decodable media resource to notify a user of a play time.
Further, the method 1 and the method 2 are applicable to a case in which at a particular moment, different users in a heterogeneous network media service request the server for a same multimedia resource or switch different multimedia resources or re-request for a multimedia resource due to network deterioration caused by a lot of conditions, to make content of the media resources synchronously presented.
The positive progress effect of the present invention is:
By using the foregoing method of the present invention, the server adopts the method for synchronously pushing a media resource or adaptively accessing a synchronous media resource for conditions of broadband networks of different users, to implement a mechanism of synchronously playing content of broadcast media and content of broadband media of the server in heterogeneous network transmission, thereby resolving the problem that media resources are asynchronous caused by different network conditions.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic timing diagram of Embodiment 1 of the present invention;
and FIG. 2 is a schematic timing diagram of Embodiment 2 of the present invention.
DETAILED DESCRIPTION
The following provides preferred embodiments of the present invention with reference to the accompanying drawings, to describe the technical solutions of the present invention in detail.
Nowadays, diversified terminal presentation manners based on heterogeneous
6 networks have become a trend of development. When watching high-quality broadcast video programs, people's demands for diversified network media services are also increasing. Usually, media content from a broadcast channel has a small and fixed delay, and therefore it has little effect on the synchronization of media content.
Media content from a broadband, for example, audios and videos, subtitles, and multimedia applications is susceptible to the effect of a current IP network, resulting in large and jittery delays, causing problems to content synchronization.
To resolve the foregoing technical problem, implementation details of the technical solutions are described in detail below by using two embodiments of the present invention, to facilitate understanding of a person skilled in the art. According to different scenarios, the method of any one of the following two embodiments may be adopted. If a client can learn of end-to-end network delay information, the method in Embodiment 1 is adopted, and if the client can learn of only a broadband network delay not including the time of a process when the media resource enters the client, the method in Embodiment 2 is adopted.
Embodiment 1 The overall technical line of this embodiment is: to learn of end-to-end broadband network delay information of different users by using a corresponding method in a network, for changing a start time at which a server starts to transmit a broadband resource, thereby implementing synchronization of a multimedia resource in a heterogeneous network.
Specifically, method steps of this embodiment include:
First, a server may learn of end-to-end broadband network delay information of different users according to some methods, for example, by using signaling information fed back by a client, or by means of estimation measurement.
Secondly, for a case in which at a particular moment, different users in a heterogeneous network media service request the server for a same multimedia resource or switch different multimedia resources or re-request for a multimedia resource due to network condition deterioration, to make content of the multimedia resources synchronously presented, after receiving a user request, the server calculates, according to network delay
Media content from a broadband, for example, audios and videos, subtitles, and multimedia applications is susceptible to the effect of a current IP network, resulting in large and jittery delays, causing problems to content synchronization.
To resolve the foregoing technical problem, implementation details of the technical solutions are described in detail below by using two embodiments of the present invention, to facilitate understanding of a person skilled in the art. According to different scenarios, the method of any one of the following two embodiments may be adopted. If a client can learn of end-to-end network delay information, the method in Embodiment 1 is adopted, and if the client can learn of only a broadband network delay not including the time of a process when the media resource enters the client, the method in Embodiment 2 is adopted.
Embodiment 1 The overall technical line of this embodiment is: to learn of end-to-end broadband network delay information of different users by using a corresponding method in a network, for changing a start time at which a server starts to transmit a broadband resource, thereby implementing synchronization of a multimedia resource in a heterogeneous network.
Specifically, method steps of this embodiment include:
First, a server may learn of end-to-end broadband network delay information of different users according to some methods, for example, by using signaling information fed back by a client, or by means of estimation measurement.
Secondly, for a case in which at a particular moment, different users in a heterogeneous network media service request the server for a same multimedia resource or switch different multimedia resources or re-request for a multimedia resource due to network condition deterioration, to make content of the multimedia resources synchronously presented, after receiving a user request, the server calculates, according to network delay
7 conditions of different users, a moment at which the multimedia resource can be synchronously presented.
Finally, the server sends the multimedia resource after the moment at which the multimedia resource can be synchronously presented, and the client synchronously plays content according to a play start time of the media content, so that broadband part content of the different users can be synchronously presented.
As shown in FIG. 1, in a specific embodiment, the specific implementation is as follows:
Step 1: it is known that a server receives a client request at a to moment, a downlink end-to-end broadband network delay of different user groups is At, and duration of an independent decodable media unit MU (media unit) is MU_duration.
Step 2: when end-to-end broadband network delays of the users are different, the server sends, at a to moment, a multimedia resource at a tin, moment to ensure synchronization, where tin, is a start moment of a first complete MU after ttnip, and as shown in formula (1) and formula (2):
0<tim4tmp<MU_duration (1) ttmp=to+At (2) In formula (1), MU_duration is media unit duration. In formula (2), to is a sending moment, At is a downlink end-to-end broadband network delay, and ttmp is a moment that is obtained by calculation and at which the client receives the first MU.
In a preferred implementation, the foregoing parameters can select the following values:
MU_duration: Os to 10s, preferably, 0.5s; and At: 0 to co, preferably, 2s.
Step 3: because initially sent content is the multimedia source at and after the tin, moment, and to enable a broadband and a broadcast to be synchronous, after a client receives the first complete MU through the broadband, the first MU is not immediately
Finally, the server sends the multimedia resource after the moment at which the multimedia resource can be synchronously presented, and the client synchronously plays content according to a play start time of the media content, so that broadband part content of the different users can be synchronously presented.
As shown in FIG. 1, in a specific embodiment, the specific implementation is as follows:
Step 1: it is known that a server receives a client request at a to moment, a downlink end-to-end broadband network delay of different user groups is At, and duration of an independent decodable media unit MU (media unit) is MU_duration.
Step 2: when end-to-end broadband network delays of the users are different, the server sends, at a to moment, a multimedia resource at a tin, moment to ensure synchronization, where tin, is a start moment of a first complete MU after ttnip, and as shown in formula (1) and formula (2):
0<tim4tmp<MU_duration (1) ttmp=to+At (2) In formula (1), MU_duration is media unit duration. In formula (2), to is a sending moment, At is a downlink end-to-end broadband network delay, and ttmp is a moment that is obtained by calculation and at which the client receives the first MU.
In a preferred implementation, the foregoing parameters can select the following values:
MU_duration: Os to 10s, preferably, 0.5s; and At: 0 to co, preferably, 2s.
Step 3: because initially sent content is the multimedia source at and after the tin, moment, and to enable a broadband and a broadcast to be synchronous, after a client receives the first complete MU through the broadband, the first MU is not immediately
8 played, but instead, the media content at this moment is played at and after the tini moment.
A specific example of multimedia resource synchronization is provided below (a manner of a client request and a manner of notifying the client by the server are not limited, and a signaling manner is used as an example below, and signaling is based on the MMT
protocol).
When a user is watching an Olympic live program, because there are a large number of excellent performances, and people have different preferences, the program party specially shoots videos in a plurality of view angles for audience to select.
At this moment, when the audience watches a main program, the audience also watches a close-up performance of a particular athlete in a small image.
However, the game of the athlete is completed soon, and the audience wants to immediately change an angle to watch the posture of another athlete. Then the audience sends a request to the server. The request signaling should include an end-to-end network delay fixed_end_to_end_delay.
This field can be obtained in HRBM message, as shown in the following Table 1.1:
Table 1.1 Syntax Values No. of hits Mnemonic HRBM ( ){
message_id 16 version 8 length 16 extension {
extension_fields_Byte }
message_payload{
max buffer size 32 fixed _ _ end to _ end _delay 32 max transmission delay 32 }
A specific example of multimedia resource synchronization is provided below (a manner of a client request and a manner of notifying the client by the server are not limited, and a signaling manner is used as an example below, and signaling is based on the MMT
protocol).
When a user is watching an Olympic live program, because there are a large number of excellent performances, and people have different preferences, the program party specially shoots videos in a plurality of view angles for audience to select.
At this moment, when the audience watches a main program, the audience also watches a close-up performance of a particular athlete in a small image.
However, the game of the athlete is completed soon, and the audience wants to immediately change an angle to watch the posture of another athlete. Then the audience sends a request to the server. The request signaling should include an end-to-end network delay fixed_end_to_end_delay.
This field can be obtained in HRBM message, as shown in the following Table 1.1:
Table 1.1 Syntax Values No. of hits Mnemonic HRBM ( ){
message_id 16 version 8 length 16 extension {
extension_fields_Byte }
message_payload{
max buffer size 32 fixed _ _ end to _ end _delay 32 max transmission delay 32 }
9 message_id ¨ message identifier of HRBM
version ¨ message version of HRBM
length ¨ message length of HRBM
extension_fields_Byte ¨ extension field of HRBM
max buffer size ¨ maximum buffer size of HRBM
fixed_ end_ to _ end_ delay ¨ end-to-end network delay max transmission_delay ¨ maximum transmission delay At t0 18:00:00, the server receives the request, where fixed_end_to_end_delay=At=2s.
Duration of an independent decodable media unit can be obtained from a video resource, where MU duration=0.5s.
At=2s ttnip=t0+At=18:00:02 6c-18:00:022 The server sends, at to=18:00:00, a resource of tim=18:00:022, and a time at which the client receives a first media resource is 18:00:02, and according to timestamp information timestamp=18:00:022 of the received first media resource, a current media unit is buffered, and the resource is played at 18:00:022.
In this way, a user can watch the posture of another athlete in a different view angle in synchronization between a broadcast and a video on-demand, so as to well resolve the problem that user media resources of broadcast and broadband are asynchronous caused by different network conditions in heterogeneous network transmission.
Embodiment 2 The overall technical line used this embodiment is: to learn of information such as broadband network delays and available bandwidths of different users by using a corresponding method in a network, for changing a start time at which a server starts to transmit a broadband resource, thereby implementing synchronization of a multimedia resource in a heterogeneous network.
Specifically, method steps of this embodiment include:
First, a server may learn of information such as broadband network delays and available bandwidths of different users according to some methods, for example, by using signaling information fed back by a client, or by means of estimation measurement.
Secondly, for a case in which at a particular moment, different users in a heterogeneous network media service request the server for a same multimedia resource or switch different multimedia resources or re-request for a multimedia resource due to network condition deterioration, to make content of the multimedia resources synchronously presented, after receiving a user request, the server calculates, according to network delay conditions of different users, a moment at which the multimedia resource can be synchronously presented.
Finally, the server sends the resource after the moment at which the resource can be synchronously presented, notifies the client of a play start time of the media content, so that broadband part content of the different users can be synchronously presented.
As shown in FIG. 2, in a specific embodiment, the specific implementation is as follows:
Step 1: it is known that a server receives a client request at a to moment, a downlink broadband network delay of different user groups is At, an available bandwidth is Bb, a video bit rate is Br, and duration of an independent decodable media unit MU
is MU_duration.
Step 2: when the broadband network delays and the available bandwidths of the users are different, the server sends, at a to moment, a multimedia resource at a tin, moment to ensure synchronization, where tin, is a start moment of a first complete MU
after tow, and as shown in formula (1), formula (2), and formula (3);
0<tint4tmp<MU_duration (1) MU_size=MU_duration*Br (2) tt,w=to+MU_size/Bb+At (3) In formula (3), to is a sending moment, MU_size is an average size of sent MUs, and see formula (2) for specific calculation, MU_duration is media unit duration, Br is a constant bit rate at which the multimedia resource is played, Bb is an available bandwidth of a broadband network, At is a downlink broadband network delay, and tow is a moment that is obtained by calculation and at which the client receives the first MU.
In a preferred implementation, the foregoing parameters can select the following values:
MU size: 0 Mbits to 100 Mbits, preferably, 30 Mbits;
MU duration: Os to 10s, preferably, 0.5s;
Br: 0 Mbps to 50 Mbps, preferably, 25 Mbps;
Bb: 0 Tbps to 1 Tbps, preferably, 1 Mbps; and At: 0 to 00, preferably, 2s.
Step 3: because initially sent content is the multimedia source at and after the tin, moment, and to enable a broadband and a broadcast to be synchronous, after a client receives the first complete MU through the broadband, the first MU is not immediately played, but instead, the media content at this moment is played at and after the too moment.
A specific example of multimedia resource synchronization is provided below. A
manner of a client request and a manner of notifying the client by the server are not limited in this embodiment. A signaling manner is used as an example below, and signaling is based on the MMT protocol. Certainly, in other embodiments, the signaling may also be applicable to other media protocols, which are not limited to the MMT
protocol.
When a user is watching an Olympic live program, because there are a large number of excellent performances, and people have different preferences, the program party specially shoots videos in a plurality of view angles for audience to select.
At this moment, when the audience watches a main program, the audience also watches a close-up performance of a particular athlete in a small image.
However, the game of the athlete is completed soon, and the audience wants to immediately change an angle to watch the posture of another athlete. Then the audience sends a request to the server. The request signaling should include a network delay network_delay and available bandwidth information network bandwidth. The request message request_message is shown in the following Table 2.1:
Table 2.1 Syntax Value No. of bits Mnemonic request message() 1 message id 8 uimsbf version 8 uimsbf length 16 uimsbf message_payloadO
network delay 16 uimsbf network bandwidth 32 uimsbf At to=18:00:00, the server receives the request, where At=2s and Bb=512 Kbit/s. The video bit rate and duration of an independent decodable media unit can be obtained from a video resource, where Br-16482 Kbit/s and MU_duration=0.5s.
MU size=MU duration*Br=0.5*16482=8241 bits AT=MU_size/Bb+At=8241/512+2=16.10s ttrnp=to+A T=1800 :1610 61=18:00:1641 The server sends, at a to=18:00:00 moment, a resource of t1t-11=18:00:1641, and when sending the resource, the server needs to send a piece of downlink signaling to notify the client of a sequence number of a sent first independent decodable media resource to notify a user of a play time. A response message response_message is as follows:
Table 2.2 Syntax Value No. of bits Mnemonic response_message() {
message id 8 uimsbf version 8 uimsbf length 16 uimsbf message_payloadO
number of assets N 16 uimsbf for(i=0; i<N; i++) 32 uimsbf asset id 16 uimsbf mpu sequence number 32 uimsbf The client looks up in the table according to a first media resource sequence known in the signaling, to obtain time information timestamp=18:00:1641 and the size MU_size=33 Mbits, and that a moment at which the current client receives the resource is 18:00:1610, buffers the current media unit, and plays the resource at 18:00:1641.
In this way, a user can watch the posture of another athlete in a different view angle in synchronization between a broadcast and a video on-demand, so as to well resolve the problem that user media resources of broadcast and broadband are asynchronous caused by .. different network conditions in heterogeneous network transmission.
The foregoing specific embodiments further describe, in detail, the technical problem resolved by the present invention, and the technical solutions and beneficial effects of the present invention. It should be understood that the foregoing descriptions are merely specific embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present invention should fall within the protection scope of the present invention.
version ¨ message version of HRBM
length ¨ message length of HRBM
extension_fields_Byte ¨ extension field of HRBM
max buffer size ¨ maximum buffer size of HRBM
fixed_ end_ to _ end_ delay ¨ end-to-end network delay max transmission_delay ¨ maximum transmission delay At t0 18:00:00, the server receives the request, where fixed_end_to_end_delay=At=2s.
Duration of an independent decodable media unit can be obtained from a video resource, where MU duration=0.5s.
At=2s ttnip=t0+At=18:00:02 6c-18:00:022 The server sends, at to=18:00:00, a resource of tim=18:00:022, and a time at which the client receives a first media resource is 18:00:02, and according to timestamp information timestamp=18:00:022 of the received first media resource, a current media unit is buffered, and the resource is played at 18:00:022.
In this way, a user can watch the posture of another athlete in a different view angle in synchronization between a broadcast and a video on-demand, so as to well resolve the problem that user media resources of broadcast and broadband are asynchronous caused by different network conditions in heterogeneous network transmission.
Embodiment 2 The overall technical line used this embodiment is: to learn of information such as broadband network delays and available bandwidths of different users by using a corresponding method in a network, for changing a start time at which a server starts to transmit a broadband resource, thereby implementing synchronization of a multimedia resource in a heterogeneous network.
Specifically, method steps of this embodiment include:
First, a server may learn of information such as broadband network delays and available bandwidths of different users according to some methods, for example, by using signaling information fed back by a client, or by means of estimation measurement.
Secondly, for a case in which at a particular moment, different users in a heterogeneous network media service request the server for a same multimedia resource or switch different multimedia resources or re-request for a multimedia resource due to network condition deterioration, to make content of the multimedia resources synchronously presented, after receiving a user request, the server calculates, according to network delay conditions of different users, a moment at which the multimedia resource can be synchronously presented.
Finally, the server sends the resource after the moment at which the resource can be synchronously presented, notifies the client of a play start time of the media content, so that broadband part content of the different users can be synchronously presented.
As shown in FIG. 2, in a specific embodiment, the specific implementation is as follows:
Step 1: it is known that a server receives a client request at a to moment, a downlink broadband network delay of different user groups is At, an available bandwidth is Bb, a video bit rate is Br, and duration of an independent decodable media unit MU
is MU_duration.
Step 2: when the broadband network delays and the available bandwidths of the users are different, the server sends, at a to moment, a multimedia resource at a tin, moment to ensure synchronization, where tin, is a start moment of a first complete MU
after tow, and as shown in formula (1), formula (2), and formula (3);
0<tint4tmp<MU_duration (1) MU_size=MU_duration*Br (2) tt,w=to+MU_size/Bb+At (3) In formula (3), to is a sending moment, MU_size is an average size of sent MUs, and see formula (2) for specific calculation, MU_duration is media unit duration, Br is a constant bit rate at which the multimedia resource is played, Bb is an available bandwidth of a broadband network, At is a downlink broadband network delay, and tow is a moment that is obtained by calculation and at which the client receives the first MU.
In a preferred implementation, the foregoing parameters can select the following values:
MU size: 0 Mbits to 100 Mbits, preferably, 30 Mbits;
MU duration: Os to 10s, preferably, 0.5s;
Br: 0 Mbps to 50 Mbps, preferably, 25 Mbps;
Bb: 0 Tbps to 1 Tbps, preferably, 1 Mbps; and At: 0 to 00, preferably, 2s.
Step 3: because initially sent content is the multimedia source at and after the tin, moment, and to enable a broadband and a broadcast to be synchronous, after a client receives the first complete MU through the broadband, the first MU is not immediately played, but instead, the media content at this moment is played at and after the too moment.
A specific example of multimedia resource synchronization is provided below. A
manner of a client request and a manner of notifying the client by the server are not limited in this embodiment. A signaling manner is used as an example below, and signaling is based on the MMT protocol. Certainly, in other embodiments, the signaling may also be applicable to other media protocols, which are not limited to the MMT
protocol.
When a user is watching an Olympic live program, because there are a large number of excellent performances, and people have different preferences, the program party specially shoots videos in a plurality of view angles for audience to select.
At this moment, when the audience watches a main program, the audience also watches a close-up performance of a particular athlete in a small image.
However, the game of the athlete is completed soon, and the audience wants to immediately change an angle to watch the posture of another athlete. Then the audience sends a request to the server. The request signaling should include a network delay network_delay and available bandwidth information network bandwidth. The request message request_message is shown in the following Table 2.1:
Table 2.1 Syntax Value No. of bits Mnemonic request message() 1 message id 8 uimsbf version 8 uimsbf length 16 uimsbf message_payloadO
network delay 16 uimsbf network bandwidth 32 uimsbf At to=18:00:00, the server receives the request, where At=2s and Bb=512 Kbit/s. The video bit rate and duration of an independent decodable media unit can be obtained from a video resource, where Br-16482 Kbit/s and MU_duration=0.5s.
MU size=MU duration*Br=0.5*16482=8241 bits AT=MU_size/Bb+At=8241/512+2=16.10s ttrnp=to+A T=1800 :1610 61=18:00:1641 The server sends, at a to=18:00:00 moment, a resource of t1t-11=18:00:1641, and when sending the resource, the server needs to send a piece of downlink signaling to notify the client of a sequence number of a sent first independent decodable media resource to notify a user of a play time. A response message response_message is as follows:
Table 2.2 Syntax Value No. of bits Mnemonic response_message() {
message id 8 uimsbf version 8 uimsbf length 16 uimsbf message_payloadO
number of assets N 16 uimsbf for(i=0; i<N; i++) 32 uimsbf asset id 16 uimsbf mpu sequence number 32 uimsbf The client looks up in the table according to a first media resource sequence known in the signaling, to obtain time information timestamp=18:00:1641 and the size MU_size=33 Mbits, and that a moment at which the current client receives the resource is 18:00:1610, buffers the current media unit, and plays the resource at 18:00:1641.
In this way, a user can watch the posture of another athlete in a different view angle in synchronization between a broadcast and a video on-demand, so as to well resolve the problem that user media resources of broadcast and broadband are asynchronous caused by .. different network conditions in heterogeneous network transmission.
The foregoing specific embodiments further describe, in detail, the technical problem resolved by the present invention, and the technical solutions and beneficial effects of the present invention. It should be understood that the foregoing descriptions are merely specific embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present invention should fall within the protection scope of the present invention.
Claims (12)
1. A method for synchronously pushing a multimedia resource based on a heterogeneous network, wherein the method is any one of the following two methods:
-method 1: comprising the following steps:
step 1, learning of, by a server, end-to-end broadband network delay information of different users;
step 2: after receiving a client request, calculating, by the server according to the end-to-end broadband network delay information of the different users, a moment at which the multimedia resource can be synchronously presented; and step 3: sending, by the server, the multimedia resource after the moment at which the multimedia resource can be synchronously presented, and synchronously playing, by a client, content according to a start presentation time of the multimedia resource, so that broadband content of the different users can be synchronously presented;
-method 2: comprising the following steps:
step 1: learning of, by a server, broadband network delay and available bandwidth information of different users;
step 2: after receiving a client request, calculating, by a server according to the broadband network delay and available bandwidth information of the different users, a moment at which the multimedia resource can be synchronously presented; and step 3: sending, by the server, the multimedia resource after the moment at which the multimedia resource can be synchronously presented, and notifying a client of a play start time of content of the multimedia resource, and synchronously presenting, by different clients, broadband content according to the play start time.
-method 1: comprising the following steps:
step 1, learning of, by a server, end-to-end broadband network delay information of different users;
step 2: after receiving a client request, calculating, by the server according to the end-to-end broadband network delay information of the different users, a moment at which the multimedia resource can be synchronously presented; and step 3: sending, by the server, the multimedia resource after the moment at which the multimedia resource can be synchronously presented, and synchronously playing, by a client, content according to a start presentation time of the multimedia resource, so that broadband content of the different users can be synchronously presented;
-method 2: comprising the following steps:
step 1: learning of, by a server, broadband network delay and available bandwidth information of different users;
step 2: after receiving a client request, calculating, by a server according to the broadband network delay and available bandwidth information of the different users, a moment at which the multimedia resource can be synchronously presented; and step 3: sending, by the server, the multimedia resource after the moment at which the multimedia resource can be synchronously presented, and notifying a client of a play start time of content of the multimedia resource, and synchronously presenting, by different clients, broadband content according to the play start time.
2. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 1, wherein in the step 2 of the method 1, when broadband network delays .DELTA.t of the users are different, the server sends, at a to moment, a multimedia resource at a t ini moment to ensure synchronization, wherein t ini is a start moment of a first complete independent decodable media unit MU after t tmp, wherein 0<=t ini-t mp<MU_duration t tmp=t0+.DELTA.t in the formula, t0 is a sending moment, MU_duration is media unit duration, .DELTA.t is a downlink end-to-end broadband network delay, and t tmp is a moment that is obtained by calculation and at which the client receives the first independent decodable media unit MU.
3. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 2, wherein a value of MU_ duration is: 0s to 10s; and a value of .DELTA.t is: 0 to .infin..
4. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 3, wherein the value of MU_duration is: 0.5s; and the value of .DELTA.t is: 2s.
5. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 2, wherein in the step 3 of the method 1, content initially sent by the server is the multimedia resource after the t ini moment, and to enable a broadband and a broadcast to be synchronous, after receiving the first complete MU by using the broadband, the client does not immediately play the first MU, but instead, plays, at the t ini moment, the multimedia resource at this moment.
6. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 1, wherein in the method 1, the server sends the multimedia resource to the client, and the client synchronously plays the content according to the start presentation time of the multimedia resource.
7. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 1, wherein in the step 2 of the method 2, when broadband network delays .DELTA.t and available bandwidths Bb of the users are different, the server sends, at a t0 moment, a multimedia resource at a t ini moment to ensure synchronization, wherein t ini is a start moment of a first complete independent decodable media unit MU after t tmp, wherein 0<=t ini-t tmp<MU_duration MU_size=MU_duration*Br t tmp=t0+MU_size/Bb+.DELTA.t in the formula, t0 is a sending moment, MU_size is an average size of sent MUs, MU_ duration is media unit duration, Br, is a constant bit rate at which the multimedia resource is played, Bb is an available bandwidth of a broadband network, .DELTA.t is a downlink broadband network delay, and t tmp is a moment that is obtained by calculation and at which the client receives a first independent decodable media unit MU.
8. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 7, wherein a value of MU_size is: 0 Mbits to 100 Mbits;
a value of MU_ duration is: 0s to 10s;
a value of Br is: 0 Mbps to 50 Mbps;
a value of Bb is: 0 Tbps to 1 Tbps; and a value of .DELTA.t is: 0 to .infin..
a value of MU_ duration is: 0s to 10s;
a value of Br is: 0 Mbps to 50 Mbps;
a value of Bb is: 0 Tbps to 1 Tbps; and a value of .DELTA.t is: 0 to .infin..
9. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 8, wherein the value of MU_size is: 30 Mbits;
the value of MU_ duration is: 0.5s;
the value of Br, is: 25 Mbps;
the value of Bb is: 1 Mbps; and the value of .DELTA.t is: 2s.
the value of MU_ duration is: 0.5s;
the value of Br, is: 25 Mbps;
the value of Bb is: 1 Mbps; and the value of .DELTA.t is: 2s.
10. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 7, wherein in the step 3 of the method 2, content initially sent by the server is the multimedia resource after the t ini, moment, and to enable a broadband and a broadcast to be synchronous, after receiving the first complete MU by using the broadband, the client does not immediately play the first MU, but instead, plays, at the t ini moment, the multimedia resource at this moment.
11. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to claim 1, wherein in the method 2, when sending the multimedia resource, the server sends a piece of downlink signaling to notify the client of a sequence number of a sent first independent decodable media resource to notify a user of a play time.
12. The method for synchronously pushing a multimedia resource based on a heterogeneous network according to any one of claims 1 to 11, wherein the method 1 and the method 2 are applicable to a case in which at a particular moment, different users in a heterogeneous network media service request the server for a same multimedia resource or switch different multimedia resources or re-request for a multimedia resource due to network deterioration caused by a lot of conditions, to make content of the media resources synchronously presented.
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| CN201610757375.1A CN107801103B (en) | 2016-08-29 | 2016-08-29 | Multimedia resource self-adaptive synchronization method based on network condition under heterogeneous network |
| CN201610757375.1 | 2016-08-29 | ||
| CN201610916013.2 | 2016-10-20 | ||
| CN201610916013.2A CN107968950A (en) | 2016-10-20 | 2016-10-20 | A kind of multimedia resource synchronized push method based on heterogeneous network |
| PCT/CN2017/099434 WO2018041092A1 (en) | 2016-08-29 | 2017-08-29 | Multimedia resource synchronous pushing method based on heterogeneous network |
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| KR100889836B1 (en) * | 2007-11-15 | 2009-03-20 | 한양대학교 산학협력단 | Broadcast terminal with synchronizing data broadcast and method of synchronizing data broadcast using same |
| CN101304351A (en) * | 2008-06-30 | 2008-11-12 | 湖南创智数码科技股份有限公司 | Synchronous play method for flow medium live system based on point-to-point transmission |
| CN101938456B (en) * | 2009-06-30 | 2014-03-12 | 华为技术有限公司 | Method, device and system for reducing media delays |
| CN102572611B (en) * | 2010-12-07 | 2015-05-13 | 中国电信股份有限公司 | Method for watching network live stream synchronously with different users and system thereof |
| US10313738B2 (en) * | 2015-02-06 | 2019-06-04 | Shanghai Jiao Tong University | Dynamic time window and cache mechanism under the heterogeneous network transmission |
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