WO2012094998A1

WO2012094998A1 - Method, system and device for transferring streaming media

Info

Publication number: WO2012094998A1
Application number: PCT/CN2012/070215
Authority: WO
Inventors: 刘继年; 陈光亮; 赵宇; 王芳
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-01-11
Filing date: 2012-01-11
Publication date: 2012-07-19
Also published as: CN102594774A; CN102594774B

Abstract

The present invention relates to a method, system and device for transferring streaming media, wherein the method includes: sending, by a streaming media server, media stream carrying priority information about the media transfer layer; receiving, by an underlying network device or a media forwarding server, the media stream and carrying out mapping processing on the priority information about the media transfer layer in the media stream according to a preset priority mapping policy; carrying out, by the underlying network device or the media forwarding server, processing on the media stream according to the priority information about the media transfer layer after the mapping processing. By using the method and system for transferring streaming media according to the present invention, the transmission quality of streaming media can be improved effectively.

Description

Streaming media transmission method, system and device

Technical field

The present invention relates to the field of multimedia data transmission technologies, and in particular, to a method, system and device for streaming media transmission.

Background technique

With the popularization of network technologies and the wide application of multimedia technologies, streaming media transmission technology for real-time transmission of multimedia content such as audio, video, subtitles or animation has emerged.

The streaming media server packs media content such as audio, video, subtitles or animation into a media stream, and the media stream is continuously transmitted in real time on the network in groups. The client does not have to wait for the media content to be completely downloaded, and only needs to delay a few seconds or ten. Playback can be started in a few seconds, while the media stream is played and played until the media content is played or the client aborts. Application of streaming media transmission technology can significantly shorten media playback latency and reduce client cache requirements.

Different QoS (Quality of Service) types and levels are supported during streaming media transmission. The QoS type refers to various QoS mechanisms already provided by the underlying network of media transmission, and the QoS level refers to the magnitude of QoS. QoS transmission is different from best-effort transmission, and transmission quality can be guaranteed. The standards organization has defined the QoS mechanisms for Layer 2 and Layer 3 networks. Taking the traditional IPv4 packet as an example, the 8-bit TOS (Type of Service) field in the packet is used to specify the processing preference in the packet transmission process. The RFC 791 divides the first three bits into eight priorities and can be applied. Traffic classification, which also provides services with different delays, throughput, and reliability for data packets; RFC 2474 redefines TOS and defines the first six bits as DSCP (Differential Services Code Point). Used to support up to 64 different kinds of traffic priority settings.

However, this QoS mechanism is only applicable to Layer 2 networks and Layer 3 networks, and does not fundamentally improve the user experience. Summary of the invention The technical problem to be solved by the present invention is to provide a streaming media transmission method, system and device to improve streaming media transmission quality.

To solve the above technical problem, the present invention provides a streaming media transmission method, the method comprising: a streaming media server sending a media stream, where the media transport layer priority information is carried;

The underlying network device or the media forwarding server receives the media stream, and performs mapping processing on the media transport layer priority information in the media stream according to a preset priority mapping policy;

The underlying network device or the media forwarding server processes the media stream according to the media transport layer priority information after the mapping process.

The above method can also have the following characteristics:

The media transport layer priority information in the media stream sent by the streaming media server includes one or more of the following: a data type priority, a service type priority, an encoding type priority, and an application layer user experience quality (QoE) mechanism priority. , Adaptation priority.

The above method can also have the following characteristics:

The transmission information part or the data part of the streaming media carries the media transport layer priority information.

The above method can also have the following characteristics:

The media stream sent by the streaming media server further carries the adaptation information, where the adaptation information includes an adaptation type and/or an adaptation priority, where the adaptation type includes reducing PSI transmission redundancy, packet loss processing, or filtering. An enhancement layer, where the media forwarding server performs an adaptation process according to the adaptation information.

The above method can also have the following characteristics:

The media stream received by the media forwarding server carries the adaptation information that reduces the PSI transmission redundancy. After receiving the media stream, the media forwarding server performs the following adaptation process:

Extracting and buffering PSI in the media stream according to the adaptation information;

Forwarding the processed media stream, and detecting the PSI change, updating the cached PSI, and sending the updated PSI to the client.

To solve the above technical problem, the present invention also provides a streaming media transmission system, where the system includes a streaming media server and an underlying network device or a media forwarding server, where: The streaming media server is configured to send a media stream, where the media transport layer priority information is carried; the underlying network device or the media forwarding server includes:

a receiving module, configured to receive the media stream;

a mapping processing module, configured to perform mapping processing on media transport layer priority information in the media stream according to a preset priority mapping policy;

The media stream processing module is configured to process the media stream according to the media transport layer priority information after the mapping process.

The present invention also provides an underlying network device, including:

a receiving module, configured to receive a media stream sent by the streaming media, where the media stream carries media transport layer priority information;

a mapping processing module, configured to perform mapping processing on media transport layer priority information in the media stream according to a preset priority mapping policy; and a media stream processing module configured to prioritize media transport layer according to mapping processing The level information processes the media stream.

The present invention also provides a media forwarding server, which includes:

The above media forwarding server can also have the following features:

The media stream received by the media forwarding server carries adaptation information that reduces program specific information (PSI) transmission redundancy;

The media stream processing module includes:

Extracting a cache sub-module, configured to: extract and cache PSI in the media stream according to the adaptation information; and update the cached PSI when detecting the PSI change, and And a forwarding submodule, configured to: forward the processed media stream, and send the updated PSI to the client when the PSI changes are detected.

To reduce PSI transmission redundancy, the present invention also provides another streaming media transmission method, the method comprising:

The streaming media server sends a media stream, where the media stream carries adaptation information that reduces PSI transmission redundancy;

Receiving, by the media forwarding server, the media stream, and extracting and buffering the PSI in the media stream according to the adaptation information;

The media forwarding server forwards the processed media stream, and when detecting the PSI change, updates the cached PSI, and sends the updated PSI to the client.

The above method can also have the following characteristics:

The media stream sent by the streaming media server further carries the packet loss processing or the adaptation information of the filtering enhancement layer, and the data stream forwarded by the media forwarding server is the adapted media stream.

Corresponding to the above method, the present invention also provides a streaming media transmission system, the system comprising a streaming media server and a media forwarding server, wherein:

a streaming media server, configured to send a media stream, where the media stream carries adaptation information that reduces PSI transmission redundancy;

The media forwarding server includes:

a receiving module, configured to receive the media stream;

Extracting a cache module, configured to extract and cache the media stream according to the adaptation information

PSI; when the PSI change is detected, updating the cached PSI;

The forwarding module is configured to forward the processed media stream, and send the updated PSI to the client when the PSI change is detected.

The present invention also provides a media forwarding server, which includes:

a receiving module, configured to receive a media stream sent by the streaming media server, the media stream carrying adaptation information that reduces program specific information (PSI) transmission redundancy; and an extraction buffer module configured to extract according to the adaptation information And buffering the media stream PSI; when the PSI change is detected, updating the cached PSI;

And a forwarding module configured to forward the processed media stream and send the updated PSI to the client when the PSI change is detected.

The streaming media transmission method and the streaming media server sending media stream in the system carry priority information conforming to the media transport layer priority mechanism; in the network transmission process of the media stream, the underlying network or the media forwarding server performs the preset priority mapping policy. After the mapping process, the media stream is processed according to the priority information after the mapping process, thereby improving the media transmission efficiency.

BRIEF abstract

1 is a schematic diagram of an embodiment of a streaming media transmission method of the present invention;

2 is a block diagram showing the structure of an embodiment of a streaming media transmission system according to the present invention;

3 is a schematic structural diagram of a module of an embodiment of a media forwarding server according to the present invention;

4 is a schematic diagram of a specific example of a communication system;

FIG. 5 is a schematic diagram showing an example of a media packet structure;

6 is a schematic diagram showing an example of a media layer priority field structure;

Figure 7 illustrates a processing flow of a streaming media forwarding server in an adapted embodiment for reducing PSI transmission redundancy;

Figure 8 depicts a streaming media client endpoint broadcast procedure in an adapted embodiment that reduces PSI transmission redundancy.

Preferred embodiment of the invention

In the new scenario of streaming media applications across networks and heterogeneous networks, in order to improve the quality of streaming media transmission in order to improve the end user experience, embodiments of the present invention require media streams to provide comprehensive and direct media transport layer priority from top to bottom. The level information quickly identifies the media stream processing priority for the underlying network (including the Layer 2 network or the Layer 3 network), and implements a direct mapping of the media transport layer priority to the underlying QoS mechanism level.

In related streaming media transmission protocols, for example, the real-time transport protocol of the standard organization IETF (Real-time) Transport Protocol, RTP) RTP Fixed Header and RTP Load Header do not carry priority information; Standard Organization ISO Moving Pictures Experts Group (MPEG-2) Transport Stream (TS) Only one bit of the priority identifier is defined, and the information provided is insufficient to achieve the above requirements. The invention is described below.

In the streaming media transmission method and system of the embodiment of the present invention, the streaming media server sends a media stream, and the media stream carries priority information that conforms to the media transport layer priority mechanism; in the network transmission process of the media stream, the underlying network or the media forwarding server is configured according to After the preset priority mapping policy is mapped, the media stream is processed according to the priority information after the mapping process, thereby improving the media transmission efficiency and obtaining the optimal media transmission effect.

In the embodiment of the present invention, a logical or physical device that provides a media transport layer forwarding function in a media stream transmission process is referred to as a media forwarding server.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

As shown in FIG. 1, the streaming media transmission method of the embodiment of the present invention includes:

Step 101: The streaming media server sends a media stream, where the media stream carries media transport layer priority information.

The media transport layer priority information in the media stream sent by the streaming media server includes but is not limited to the following media transport layer priority information: data type priority, service type priority, coding type priority, and application layer user experience quality ( The priority of the mechanism and the priority of the adaptation are used. In the specific implementation, one of the media transport layer priority information or the plurality of media transport layer priority information may be used, which is not limited by the present invention.

The following describes the various media transport layer priority information:

First, the data information (also known as the data type priority)

Indicates the priority of the data type carried in the media stream packet, and the different data types have different priorities when transmitting. The data type can be divided into at least three types of business data, program data, and media data. Among them, the business data provides information such as the service provider, program type, program relationship, event, time, etc., such as Digital Video Broadcasting (DVB) service information (SI); program data provides a single media Program information in the stream, Information such as the composition and relationship of the program, such as Program Specific Information (PSI) of the TS; the media data includes media types such as a video stream, an audio stream, a subtitle stream, and a picture.

Second, business information, also known as business type priority

Indicates the priority of the service type carried in the media stream packet. Different service types have different priorities when transmitting. According to the transmission characteristics including code rate, delay, buffering, jitter, and packet loss, the service type can be classified into at least IPTV live broadcast, IPTV on-demand, audio broadcast, video surveillance, visual communication, subtitle, etc. Not limited.

Third, the encoding information, also known as the encoding type priority

Indicates the priority of the media frame type carried in the media stream packet, and different media frame types have different priorities when transmitting. The media frame type is related to the encoding type. For example, the H264 video encoding can be divided into Instantaneous Decode Refresh (IDR), Intra, B, and P. For SVC encoding, the basic layer and the enhancement layer can be divided, and the MVC encoding can be performed. Divide the primary and secondary perspectives.

Fourth, the application layer QoE mechanism information, referred to as AppQoEtools information, also known as the application layer QoE mechanism priority

Indicates the application layer user quality of experience (QoE) mechanism priority that is carried in the media stream packet. Different application layer QoE mechanism types have different priorities when transmitting. Including but not limited to existing QoE mechanisms, such as Automatic Repeat Requst (ARQ), Forward Error Correction (FEC), etc.

Fifth, the adaptation information is also adapted to the priority

Indicates the media layer adaptation priority of the media stream packet, and the different adaptation processes correspond to different priorities. The adaptation process refers to the function of adapting the media layer transmission, such as SVC adaptation, service data, and program data. Match the media layer adaptation function.

Adaptation during media streaming. For example, at the network layer, the router performs packet loss processing on the media stream according to its own cache state; for example, at the application layer or the media transport layer, the media forwarding server performs a Scalable Video Coding (SVC) enhancement layer according to the underlying network condition. Filter, and so on.

For each priority information in the media transmission priority mechanism, a transmission quantization level of each priority is established, and each specific type has a corresponding quantization value. a rendering side of the transport layer priority The formula is to directly display the quantized values of various priorities, and the other way is to calculate a comprehensive value according to the quantized values of the respective priorities, and the calculation rule is not limited. Regardless of which of the above presentation methods is adopted, the underlying network does not need to know the media information, and can quickly map the streaming media transport layer priority mechanism to the underlying network QoS mechanism.

According to the existing streaming media transmission protocol, a streaming media packet carried on the underlying network usually consists of three parts: transmission information, load information, and data.

The media transport layer priority information may be placed in the transport information portion for carrying. For example, the MPEG-2 TS header or RTP header is extended to carry the media transport layer priority in an extension field.

Considering the optimized transmission of the redundant information, the media transport layer priority information may also be carried in the data part, for example, extending the PSI of the MPEG-2 TS, and carrying the media transport layer priority in the PSI extended data. level. The media transport layer priority is carried by the transport information portion only in the exceptional case.

Step 102: The underlying network device or the media forwarding server receives the media stream, and performs mapping processing on the priority information in the media stream according to a preset priority mapping policy.

During the network transmission process, the underlying network device reads the media transport layer priority information from the media stream, and quickly maps to the underlying network QoS priority according to the mapping policy.

In the network transmission, the media forwarding server (such as the network internal forwarding server or the network edge forwarding server) identifies the media transmission layer priority information, and quickly maps to the corresponding forwarding priority according to the mapping policy.

The mapping policy synthesizes various types of information in the media transmission priority mechanism, and different QoS mechanisms can capture different mapping strategies. The media transmission priority of the media stream remains unchanged during the transmission process, which can well support the network to use different QoS transmission mechanisms and levels.

Step 103: The underlying network device or the media forwarding server processes the media stream according to the mapping priority information.

In order to perform the adaptation process, the media stream sent by the streaming media server further carries the adaptation information. The adaptation information includes an adaptation type and/or an adaptation priority, where the adaptation type includes a PSI transmission redundancy reduction, a packet loss processing, or a filtering enhancement layer, and the media forwarding server performs the adaptation according to the adaptation information. With processing.

If the media stream received by the media forwarding server carries the adaptation information that reduces PSI transmission redundancy; after receiving the media stream, the media forwarding server performs the following adaptation process:

Corresponding to the above method, the present invention further provides a streaming media transmission system. As shown in FIG. 2, the system includes a streaming media server, an underlying network device, or a media forwarding server, where:

a streaming media server, configured to send a media stream, where the media stream carries media transport layer priority information;

The underlying network device or media forwarding server includes:

a receiving module, configured to receive the media stream;

Optionally, the media transport layer priority information in the media stream sent by the streaming media server includes one or more of the following: a data type priority, a service type priority, an encoding type priority, and an application layer user experience quality (QoE). ) Mechanism priority, adaptation priority. Each priority information is as described above.

Optionally, the transmission information part or the data part of the streaming media carries the media transport layer priority information.

The media stream sent by the streaming media server further carries the adaptation information, where the adaptation information includes an adaptation type and/or an adaptation priority, where the adaptation type includes reducing PSI transmission redundancy and packet loss processing. Or filtering the enhancement layer, and the media forwarding server performs an adaptation process according to the adaptation information.

When the media stream received by the media forwarding server carries the adaptation information for reducing PSI transmission redundancy, different from the underlying network device, as shown in FIG. 3, the media stream processing module of the media forwarding server includes:

Extracting a cache submodule, configured to extract and cache the media stream according to the adaptation information

PSI; and when the PSI change is detected, the cached PSI is updated,

The forwarding submodule is configured to forward the processed media stream, and when detecting the PSI change, send the updated PSI to the client.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 4 shows a specific example of a communication system in which the network 1 includes a streaming media server 10, a router 11, a router 12a and a media forwarding server 12b, the network 2 includes a router 13, and the network 3 includes a router 14. The communication system is used for network transmission and forwarding of packet data such as audio, video, subtitles, and data. The communication system network layer uses the IP protocol, and the data link layer uses DWDM or ATM.

The forwarding steps of the media stream in the communication system are as follows:

Step A: In the network 1, the streaming server 10 outputs various media streams in real time.

Figure 5 shows an example of a media packet structure in which the media transport format uses MPEG-TS and the QoS mechanism uses Diff-Serv. The media packet consists of four parts: IPv4 header, TS header, PES header and media data. The ToS field in the IPv4 header is used to differentiate services (Different Services, Diff-Serv). The value of the ToS field changes during media streaming, and the router assigns different Diff-Servs. The transport layer priority field in the TS header is an extension field, and the extension method follows the TS standard. Used to carry the priority described in the present invention.

One way to present the priority of the transport layer is to directly display the quantized values of each dimension. The other way to present is to calculate a composite value based on the quantized values of each dimension. The priority presentation method for calculating the integrated value is very simple, and only the media layer priority field needs to support a certain quantization level, for example, the 8-bit length supports the quantization level of 0-255. It is slightly more complicated to capture the representation of the quantized values of each dimension, and the domain needs to be further divided in the media layer priority field. Fig. 6 shows an example of a structure of a media layer priority field that exhibits quantized values for each dimension amount. An example media layer priority field is composed of six fields, namely: a data information field, a service information field, an encoded information field, an AppQoEtools domain, an adaptation information domain, and a reserved domain. The length of the media layer priority field is 32 bits. The first four fields occupy 4 bits, the range of field values is 0-15, and the corresponding priority is from low to high. The adaptation information field occupies 8 bits. The first 4 bits are priority bits. 0-15, the corresponding priority is from low to high, the last 4 bits are type bits, the field value range is 0-15, corresponding to the adaptation type; one domain of the reserved domain occupies 8 bits.

Based on the above example, a media layer priority field of an IPTV multicast live stream providing Forward Error Correction (FEC), which is a Scalable Video Codeing (SVC) grading, is as follows:

Data information field: Give priority to PSI 0, give priority to SI 1 , assign priority to audio data 2, give priority to video data 3;

Service Information Domain: Give priority to IPTV live broadcast 1 ;

The coded information field: assigns priority 0 to the IDR of the video SVC base layer, priority 1 to the non IDR of the video SVC base layer, and priority 2 to the IDR of the video S VC enhancement layer, which is the non IDR of the video SVC enhancement layer. Give priority 3;

AppQoEtools domain: The priority of the FEC mechanism is 2;

Adaptation information field: The adaptation type is to reduce PSI transmission redundancy, and the priority is 0;

Reserved field: The default is 0.

Step B: The media stream flows through the router 11. The router 11 applies the Diff-serv to the media stream, applies the local policy to map the media layer priority field of the media stream to the ToS field of the IPv4 packet header, and then transmits the media stream QoS to the router 12a.

Step C: After receiving the media stream, the router 12a performs mapping processing and forwards the packet to the media forwarding server 12b of the same node. The media forwarding server 12b performs mapping processing and media layer adaptation according to the characteristics of the network 2 and the network 3. The matched media streams are QoS transmitted to the router 13 of the network 2 and the router 14 of the network 3 via the router 12a. Here, the router 12a can execute a new Diff-serv policy, apply a local policy to change the ToS value of the media stream IP header, or apply other QoS mechanisms, such as applying a local policy to map the media layer priority to a multi-protocol label switching (Multi-Protocol). Label Switching, MPLS ).

Step D: The router 13 transmits the media stream QoS to the network nodes 15a and 15b, and the router 14 transmits the media stream QoS to the network nodes 15d and 15e for media playback.

The following describes the adaptation of the media forwarding server in detail:

Example of media layer adaptation 1 :

The media video encoding type uses SVC. The streaming media server 10 outputs the spatial domain-classified SVC video stream, where the SVC base layer size is QVGA and the SVC enhancement layer size is VAG.

The network 2 is oriented to mobile handheld devices such as 15a and 15b, and the video resolution is QVGA; the network 3 is for PCs and TVs such as 15d and 15e, and the video resolution is VGA.

The media forwarding server 12b carries the SVC adaptation indication according to the adaptation priority information of the media stream, and filters the S VC enhancement stream in the video stream for the network 2, and does not perform any adaptation processing for the network 3.

Example of media layer adaptation 2:

The PSI transmission redundancy is reduced, and the media forwarding server identifies the adaptation information field in the media stream, filters the media packet from the media stream, caches it locally, and maintains the update. The cached PSI is sent only when the client 15c joins the multicast live broadcast or the PSI changes. Figure 7 and Figure 8 give a detailed description of the process flow.

Figure 7 depicts the processing flow of a streaming media forwarding server in an adapted embodiment for reducing PSI redundant information transmission in MPEG-TS. The process is as follows:

Step 701: The streaming media server 10 sends the multicast media stream with the original PSI in the above example. Step 702: The media forwarding server 12b receives the multicast media stream, and the media forwarding server 12b identifies the adaptation information field in the media stream.

Step 703: The media forwarding server 12b filters (ie, extracts) the original PSI in the media stream, and caches it locally. Step 704: The media forwarding server 12b applies another media transmission adaptation policy. Here, for example, in the foregoing example, the SVC enhanced flow in the video stream is filtered out for the network 2, where PSI update may be involved herein;

Step 705, the media forwarding server 12b detects whether the PSI changes, if the change is performed, step 706, otherwise step 708;

Step 706: The media forwarding server 12b caches the changed PSI.

Step 707: The media forwarding server 12b sends the updated PSI.

Step 708: The media forwarding server 12b forwards the adapted media stream.

Figure 8 depicts a streaming media client endpoint broadcast procedure in an adapted embodiment that reduces PSI transmission redundancy. The process is as follows:

Step 801: The client 15c selects an IPTV multicast live broadcast.

Step 802: The client 15c joins the multicast group.

Step 803, the router 12a notifies the media forwarding server 12b;

Step 804: The media forwarding server 12b sends the buffered PSI.

Step 805: The client 15c initializes the decoding resource according to the PSI.

Step 806, the media forwarding server 12b performs other media adaptation, and forwards the code stream to the router 12a, and the router 12a forwards the media stream to the client 15c;

Step 807: The client 15c decodes and presents the received multicast media stream.

The above process is an implementation of an adaptation method for reducing PSI transmission redundancy, and any method for reducing redundant information transmission in a TS stream or the like by using the design idea and any equivalent transformation thereof belongs to the present invention. protected range.

The embodiment of the present invention further provides another streaming media transmission method, where the method focuses on the adaptation of the media forwarding server according to the adaptation information, which specifically includes:

Receiving, by the media forwarding server, the media stream, and extracting and buffering the PSI in the media stream according to the adaptation information; The media forwarding server forwards the processed media stream, and when detecting the PSI change, updates the cached PSI, and sends the updated PSI to the client.

In addition, the media stream sent by the streaming media server may also carry the packet loss processing or the adaptation information of the filtering enhancement layer, and the data stream forwarded by the media forwarding server is the adapted media stream.

Corresponding to the above method, the present invention also provides another streaming media transmission system, the system comprising a streaming media server and a media forwarding server, wherein:

The media forwarding server includes:

a receiving module, configured to receive the media stream;

PSI; when the PSI change is detected, updating the cached PSI;

Optionally, the media stream sent by the streaming media server further carries the packet loss processing or the filtering enhancement layer adaptation information, and the data forwarding packet forwarded by the media forwarding server is the adapted media stream.

The streaming media transmission method and system proposed by the present invention proposes a new media transport layer priority mechanism, which establishes a fast mapping of the media transport layer priority to the underlying network priority, and supports media adaptation in the media forwarding network. Supports various underlying QoS transport mechanisms, which can effectively improve the quality of streaming media transmission. It should be noted that the specific embodiments in the present invention are merely enumerating individual examples of the present invention, and the streaming media transmission method and system using the design idea of the present invention and any equivalent transformation thereof are all within the scope of protection of the present invention. .

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Optionally, all or part of the steps of the above embodiments may also be used. One or more integrated circuits are implemented. Correspondingly, each module in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial Applicability In the above streaming media transmission method and system, the streaming media server sends a media stream carrying priority information conforming to the media transport layer priority mechanism; in the network transmission process of the media stream, the underlying network or the media forwarding server according to the preset priority After the mapping policy is mapped, the media stream is processed according to the priority information after the mapping process, thereby improving media transmission efficiency.

Claims

Claim

1. A streaming media transmission method, the method comprising:

The streaming media server sends a media stream, where the media transport layer priority information is carried;

Receiving, by the underlying network device or the media forwarding server, the media stream, and mapping the media transport layer priority information in the media stream according to a preset priority mapping policy;

2. The method according to claim 1, wherein: the media transport layer priority information in the media stream sent by the streaming media server comprises one or more of the following: a data type priority, a service type priority, and an encoding type priority. Level, application layer user experience quality (QoE) mechanism priority, adaptation priority.

3. The method according to claim 1, wherein: the transmission information part or the data part of the streaming media carries the media transmission layer priority information.

4. The method according to claim 1, wherein: the media stream sent by the streaming media server further carries adaptation information, where the adaptation information includes an adaptation type and/or an adaptation priority, and the adaptation Types include reduced program specific information (PSI) transmission redundancy, packet loss processing, or filtering enhancement layers.

The media forwarding server processes the media stream according to the media transport layer priority information after the mapping processing, and the media forwarding server performs an adaptation process according to the adaptation information.

5. The method according to claim 1, wherein: the media stream received by the media forwarding server carries adaptation information that reduces PSI transmission redundancy; and the media forwarding server performs media transmission layer priority information according to mapping processing. Processing the media stream includes:

6. A streaming media transmission system, the system comprising a streaming media server and an underlying network device or Media forwarding server, where:

The streaming media server is configured to: send a media stream, where the media transport layer priority information is carried;

The underlying network device or the media forwarding server includes:

a receiving module, configured to receive the media stream;

7. The system according to claim 6, wherein: the media transport layer priority information in the media stream sent by the streaming media server comprises one or more of the following: a data type priority, a service type priority, and an encoding type priority. Level, application layer user experience quality (QoE) mechanism priority, adaptation priority.

8. The system according to claim 6, wherein: the transmission information part or the data part of the streaming media carries the media transmission layer priority information.

9. The system according to claim 6, wherein: the media stream sent by the streaming media server further carries adaptation information, where the adaptation information includes an adaptation type and/or an adaptation priority, and the adaptation The type includes a reduced program specific information (PSI) transmission redundancy, a packet loss processing or a filtering enhancement layer, and the media stream processing module is configured to perform an adaptation process according to the adaptation information.

The system of claim 6, wherein: the media stream received by the media forwarding server carries the adaptation information that reduces PSI transmission redundancy; and the media stream processing module of the media forwarding server includes:

Extracting a cache submodule, configured to: extract and cache PSI in the media stream according to the adaptation information; and update a cached PSI when detecting the PSI change, and

And a forwarding submodule, configured to: forward the processed media stream, and send the updated PSI to the client when the PSI changes are detected.

11. An underlying network device, comprising:

12. A media forwarding server, comprising:

The media forwarding server according to claim 12, wherein: the media stream received by the media forwarding server carries adaptation information that reduces program specific information (PSI) transmission redundancy;

The media stream processing module includes:

And a forwarding submodule, configured to: forward the processed media stream, and send the updated PSI to the client when the PSI change is detected.

14. A streaming media transmission method, the method comprising:

The streaming server sends a media stream, the media stream carrying adaptation information that reduces program specific information (PSI) transmission redundancy;

The method of claim 14, wherein: the media stream sent by the streaming media server further carries packet loss processing or filtering enhancement layer adaptation information, and the media forwarding server forwards the media stream to be adapted. Processed media stream.

16. A streaming media transmission system, the system comprising a streaming media server and a media forwarding server, wherein:

The streaming media server is configured to: send a media stream, where the media stream carries adaptation information that reduces program specific information (PSI) transmission redundancy;

The media forwarding server includes:

a receiving module configured to receive the media stream;

PSI; when the PSI change is detected, updating the cached PSI;

The system according to claim 16, wherein: the media stream sent by the streaming media server further carries the packet loss processing or the adaptation information of the filtering enhancement layer, and the forwarding module is configured to be forwarded and adapted. Processed media stream.

18. A media forwarding server, comprising:

a receiving module, configured to receive a media stream sent by the streaming media server, the media stream carrying adaptation information that reduces program specific information (PSI) transmission redundancy; and an extraction buffer module configured to extract according to the adaptation information And buffering the media stream

PSI; when the PSI change is detected, updating the cached PSI;

19. The media forwarding server according to claim 18, wherein: said streaming media service The media stream sent by the server further carries the packet loss processing or the adaptation information of the filtering enhancement layer, and the forwarding module is configured to forward the media stream after the adaptation processing.