CN108270731A - A kind of data flow transmission method, device and relevant device - Google Patents

Abstract

The invention discloses a data stream transmission method, comprising: for at least two data streams of a first media source, using different port numbers of the User Datagram Protocol (UDP) to identify each data stream; based on the first media source The multicast Internet Protocol (IP) address of the identified first media source sends at least two data streams. The invention also discloses a data stream transmission device, a source device, an intermediate device and a terminal.

Description

A data stream transmission method, device and related equipment

technical field

The present invention relates to multicast transmission technology in the Internet field, in particular to a data stream transmission method, device and related equipment.

Background technique

With the rapid development of broadband Internet TV services, multicast transmission technology is widely used in Internet transmission. For example, in IPTV and OTT (Over The Top) technologies, multicast transmission technology is often used to realize live broadcast services.

In the current live broadcast service, a multicast group can only transmit one kind of multicast stream, and a channel contains multiple streams, so multiple streams of a channel need to be transmitted by multiple multicast groups. However, the resources of the multicast group are limited, so how to use the limited multicast group resources to transmit multiple data streams is an urgent problem to be solved at present.

Contents of the invention

In order to solve existing technical problems, embodiments of the present invention provide a data stream transmission method, device and related equipment.

The technical scheme of the embodiment of the present invention is realized like this:

An embodiment of the present invention provides a data stream transmission method, including:

For at least two data streams of the first media source, use different port numbers of User Datagram Protocol (UDP, User Datagram Protocol) to identify each data stream;

Based on the multicast Internet Protocol IP address of the first media source, at least two data streams of the identified first media source are sent out.

In the above scheme, the port number of UDP is used to identify each data flow, including:

Encapsulate a destination port number in the UDP packet header of each data flow, and the destination port numbers of the at least two data flows are different;

The sending out at least two data streams of the identified first media source based on the multicast IP address of the first media source includes:

Add the multicast IP address corresponding to the first media source to the destination address of the IP packet header.

In the above solution, the code rate of each data stream of the first media source is different, or the angles of the scenes corresponding to each data stream of the first media source are different.

The embodiment of the present invention also provides a data stream transmission method, including:

receive data stream;

Analyzing the data stream to obtain at least two port numbers of the first multicast IP address and UDP;

Utilize the first multicast IP address to determine that the data stream received is the data stream of the first media source; utilize the different port numbers of UDP to identify each data stream of the first media source;

For at least two data streams of the first media source received, each data stream is identified by a different port number of UDP;

Based on the second multicast IP address of the first media source, at least two data streams of the identified first media source are sent out.

In the above solution, the receiving data stream includes:

Utilize the hook function to receive the complete message of the multicast data formed by the IP message header and the UDP message header of the message, and at least two data streams of the first media source;

Correspondingly, for each message, analyze the IP message header to obtain the first multicast IP address;

The UDP packet header is parsed to obtain a corresponding UDP port number.

In the above solution, before receiving the data stream, the method further includes:

Using the first multicast IP address corresponding to the first media source, join the multicast group corresponding to the multicast channel of the first media source based on Internet Group Management Protocol (IGMP, Internet Group Management Protocol).

In the above solution, joining the multicast group corresponding to the multicast channel of the first media source based on IGMP includes:

Using the first multicast IP address corresponding to the first media source to generate an IGMP message;

Sending the IGMP message to the switch; the IGMP message is used to request to join the multicast group corresponding to the multicast channel of the first media source.

In the above scheme, the port number of UDP is used to identify each data flow, including:

Encapsulate a destination port number in the UDP packet header of each data flow, and the destination port numbers of the at least two data flows are different;

The sending out at least two data streams of the identified first media source based on the second multicast IP address of the first media source includes:

Add the second multicast IP address corresponding to the first media source to the destination address of the IP packet header.

In the above solution, the code rate of each data stream of the first media source is different, or the angles of the scenes corresponding to each data stream of the first media source are different.

An embodiment of the present invention further provides a data stream transmission method, including:

receive data stream;

Analyze the data stream to obtain at least two port numbers of the multicast IP address and UDP;

Using the multicast IP address to determine that the received data flow is the data flow of the first media source; using the different port numbers of the UDP to identify each data flow of the first media source.

In the above solution, the receiving data stream includes:

Utilize the hook function to receive the complete message of the multicast data formed by the IP message header and the UDP message header of the message, and at least two data streams of the first media source;

Correspondingly, for each message, analyze the IP message header to obtain a multicast IP address;

The UDP packet header is parsed to obtain a corresponding UDP port number.

In the above solution, before receiving the data stream, the method further includes:

Join the multicast group corresponding to the multicast channel of the first media source based on IGMP by using the multicast IP address corresponding to the first media source.

In the above solution, joining the multicast group corresponding to the multicast channel of the first media source based on IGMP includes:

Using the multicast IP address corresponding to the first media source to generate an IGMP message;

Sending the IGMP message to the switch; the IGMP message is used to request to join the multicast group corresponding to the multicast channel of the first media source.

In the above solution, the code rate of each data stream of the first media source is different, or the angles of the scenes corresponding to each data stream of the first media source are different.

The embodiment of the present invention also provides a data stream transmission device, including:

The first identification module is used for at least two data streams of the first media source, using different port numbers of UDP to identify each data stream;

The first sending unit sends the identified at least two data streams of the first media source based on the IP address of the first media source.

In the above scheme, the first identification module is specifically used to encapsulate a destination port number in the UDP header of each data flow, and the destination port numbers of the at least two data flows are different;

The first sending unit is specifically configured to add the multicast IP address corresponding to the first media source to the destination address of the IP packet header.

An embodiment of the present invention further provides a data stream transmission device, including:

a first receiving unit, configured to receive a data stream;

The first parsing unit is used for parsing the data flow to obtain the first multicast IP address and at least two port numbers of UDP;

The first identifying unit is configured to use the first multicast IP address to determine that the received data stream is the data stream of the first media source; utilize the different port numbers of the UDP to identify each data stream of the first media source;

The second identification module is used for at least two data streams of the first media source received, using different port numbers of UDP to identify each data stream;

The second sending unit is configured to send the identified at least two data streams of the first media source based on the second IP address of the first media source.

In the above scheme, the device also includes:

The first joining unit is configured to use the first multicast IP address corresponding to the first media source to join the multicast group corresponding to the multicast channel of the first media source based on IGMP.

The embodiment of the present invention also provides a data transmission stream device, including:

a second receiving unit, configured to receive a data stream;

The second parsing unit is used for parsing the data flow to obtain at least two port numbers of the multicast IP address and UDP;

The second identifying unit is configured to use the multicast IP address to determine that the received data flow is the data flow of the first media source; and use the different port numbers of the UDP to identify each data flow of the first media source.

In the above scheme, the device also includes:

The second joining unit is configured to use the multicast IP address corresponding to the first media source to join the multicast group corresponding to the multicast channel of the first media source based on IGMP.

The embodiment of the present invention also provides a source device, including:

The first processor is used for at least two data streams of the first media source, using different port numbers of the user datagram UDP to identify each data stream;

The first communication interface is configured to send out at least two data streams of the identified first media source based on the multicast IP address of the first media source.

An embodiment of the present invention provides an intermediate device, including:

The second communication interface is used to receive the data stream;

The second processor is used to analyze the data flow, and obtain at least two port numbers of the first multicast IP address and UDP; use the first multicast IP address to determine that the received data flow is the data flow of the first media source; Using different port numbers of UDP to identify each data stream of the first media source; and for at least two data streams of the first media source received, using different port numbers of UDP to identify each data stream;

The second communication interface is further configured to send out at least two data streams of the identified first media source based on the second multicast IP address of the first media source.

The embodiment of the present invention also provides a terminal, including:

The third communication interface is used to receive the data stream;

The third processor is used to analyze the data flow to obtain at least two port numbers of the multicast IP address and UDP; use the multicast IP address to determine that the received data flow is the data flow of the first media source; Different port numbers of UDP identify each data stream of the first media source.

The data stream transmission method, device and related equipment provided by the embodiments of the present invention, for at least two data streams of the first media source, use different port numbers of UDP to identify each data stream; multicast based on the first media source The IP address sends at least two data streams of the identified first media source; receives the data stream; parses the data stream to obtain at least two port numbers of the multicast IP address and UDP; utilizes the multicast IP address to determine receiving The data stream of the first media source is the data stream of the first media source; use different port numbers of UDP to identify each data stream of the first media source, that is to say, when transmitting multiple data streams of the media source, the multicast IP address is used to distinguish different Different media sources use different UDP port numbers to distinguish a media source, that is, different data streams under the same multicast group. In this way, the occupied multicast group resources are greatly reduced. At the same time, based on the multicast IP address of the first media source, at least two data streams of the identified first media source are sent out, fully complying with IGMP, and having good compatibility with existing networks.

Description of drawings

In the drawings (which are not necessarily drawn to scale), like reference numerals may describe like parts in different views. Similar reference numbers with different letter suffixes may indicate different instances of similar components. The drawings generally illustrate the various embodiments discussed herein, by way of example and not limitation.

FIG. 1 is a schematic flow diagram of a data stream transmission method according to an embodiment of the present invention;

2 is a schematic flowchart of a second data stream transmission method according to Embodiment 1 of the present invention;

3 is a schematic flowchart of a third data stream transmission method according to Embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of a data stream transmission device according to Embodiment 2 of the present invention;

5 is a schematic structural diagram of a second data stream transmission device according to Embodiment 2 of the present invention;

6 is a schematic structural diagram of a third data stream transmission device according to Embodiment 2 of the present invention;

7 is a schematic structural diagram of a transmission device for realizing multicast group support for multiple data streams according to Embodiment 3 of the present invention;

8 is a schematic diagram of a network between a multicast channel source device and a multicast channel access server according to Embodiment 3 of the present invention;

FIG. 9 is a schematic diagram of networking between CDN nodes in Embodiment 3 of the present invention;

FIG. 10 is a schematic diagram of a network between a CDN node and a terminal according to Embodiment 3 of the present invention;

FIG. 11 is a schematic diagram of a network corresponding to a VR live broadcast service according to Embodiment 3 of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Before describing the embodiments of the present invention, it is necessary to understand related technologies first.

In traditional IPTV applications, multicast transmission is often used for channel live broadcast. Generally speaking, one channel has only one bit rate, so a multicast group (corresponding to a multicast routing entry) is required to transmit a multicast bit stream. When the same name channel (such as CCTV1) has two code rates of standard definition and high definition, it is still processed as two channels, so the data streams of these two code rates need to occupy two multicast groups for transmission.

At the same time, in the application of OTT technology, one channel has multiple bit rates, but the data streams of each bit rate in the data streams of these multiple bit rates are still processed according to one channel, and the terminal player Select the data stream that uses the corresponding code rate. In this case, the usual processing method is to make the data stream of each code rate into a multicast group separately. In this way, one channel often occupies multiple multicast groups, and also occupies multiple multicast routes. entry.

In addition, with the rapid development of virtual reality (VR, Virtual Reality) technology, the application of panoramic video is becoming more and more extensive, and this application brings a very realistic video experience to users. Panoramic live broadcast that supports VR is becoming more and more popular. Multicast technology has natural advantages in live broadcast applications. In panoramic live broadcast, scenes from different angles are transmitted using multiple streams. In addition, sometimes in order to save bandwidth, Scene pictures from different angles need to use different encoding rates, so there will be situations where multiple streams need to be transmitted for one live broadcast. In this case, according to the traditional multicast transmission method, only multiple multicast groups can be used. Transmit multiple streams of a channel.

However, with the vigorous development of the radio and television business, the number of live channels is increasing, and the demand for supporting thousands of channels has been put forward. , then according to the traditional multicast transmission mode, the number of multicast groups to be occupied is very large.

When performing multicast transmission, the multicast group resources such as the content distribution network (CDN, Content Delivery Networks) server interface network card, the multicast routing entries of the protocol stack, and the number of multicast groups on the bearer network router are required. However, these multicast group resources (That is, the number of multicast routing entries) is limited, that is to say, multicast routing entries are scarce resources.

So how to implement multicast group transmission of multiple data streams on the basis of limited multicast group routing entries is a problem that needs to be solved at present.

At the same time, on the one hand, in the multicast transmission technology, IGMP is generally used to control and manage the multicast group. Based on IGMP, it directly contacts the multicast host. The router running IGMP is responsible for managing the joining and leaving of group members, and maintaining the group membership.

Table 1 shows the format of the IGMP message. It can be seen from Table 1 that in an IGMP message, the main fields include version, type, checksum and multicast address.

Table 1

Wherein, the version field includes the IGMP version identifier, currently there are three versions V1, V2 and V3.

The Type field includes: Membership Query (0x11) and Membership Report (0x12).

Checksum, used to check IGMP packets.

When the Type field represents a Membership Report, the Group Address field contains the multicast address. When the type field represents a membership query, the group address field is 0 and is ignored by the host.

On the other hand, Table 2 shows the UDP message format.

Table 2

It can be seen from Table 2 that the UDP message includes: a source port and a destination port, a field indicating the length of the data message, a checksum of the UDP data message, and UDP data.

It can be seen from the IGMP specification and message format that when controlling and managing a multicast group, IGMP is only related to the IP address of the multicast group, and has nothing to do with the UDP port carried by the IP. However, multicast group data packets are carried on IP and UDP. Therefore, it is feasible to transmit multi-port data streams on a certain multicast group, and it does not affect the normal operation of the IGMP protocol suite itself.

Based on this, in various embodiments of the present invention: when transmitting multiple data streams of media sources, multicast IP addresses are used to distinguish different media sources, and different UDP port numbers are used to distinguish one media source, that is, the same multicast group different streams of data.

Embodiment one

The method for transmitting data streams in the embodiment of the present invention is specifically a method for transmitting multi-channel data streams in a multicast group, which is applied to a multicast channel source device in a multicast network, as shown in FIG. 1 , including the following steps:

Step 101: For at least two data streams of the first media source, use different UDP port numbers to identify each data stream;

Specifically, a destination port number is encapsulated in the UDP packet header of each data flow, and the destination port numbers of the at least two data flows are different.

Here, in actual application, the code rate of each data stream of the first media source may be different; or, when in a VR live broadcast scene, the angle of the scene picture corresponding to each data stream of the first media source different.

In practical applications, different UDP port numbers may be set as required to identify different data streams of the first media source. For example, assuming that the data stream has three data streams: high-definition, standard-definition, and smooth, you can set three even-numbered port numbers, such as 902, 904, and 906, to identify the high-definition, standard-definition, and smooth three-way data streams according to business needs. road data flow.

Step 102: Based on the multicast IP address of the first media source, send at least two data streams of the identified first media source.

Specifically, add the multicast IP address corresponding to the first media source at the destination address of the IP packet header, after adding the multicast IP address corresponding to the first media source at the destination address of the IP packet header, the second At least two data streams of a media source are presented in the form of IP packets.

Correspondingly, the embodiment of the present invention also provides a method for transmitting data streams, specifically a method for transmitting multi-channel data streams in a multicast group, which is applied to a multicast channel intermediate device in a multicast network, such as a multicast The channel access streaming media server (such as CDN central node, etc.) or its next-level intermediate equipment (equipment other than the playback terminal), as shown in Figure 2, includes the following steps:

Step 201: receiving data stream;

Specifically, the hook function is used to receive the complete message of the multicast data formed by the IP message header and the UDP message header of the message, and at least two data streams of the first media source.

Here, in actual application, before performing this step, the method may also include:

Using the first multicast IP address corresponding to the first media source, join the multicast group corresponding to the multicast channel of the first media source based on IGMP.

Specifically, using the first multicast IP address corresponding to the first media source to generate an IGMP message;

Sending the IGMP message to the switch; the IGMP message (such as an IGMP join (join) or report (report) message) is used to request to join the multicast group corresponding to the multicast channel of the first media source.

Of course, when leaving the multicast group corresponding to the multicast channel of the first media source, the first multicast IP address corresponding to the first media source can be used to generate an IGMP message; message: the IGMP message (such as an IGMP leave message) is used to request to leave the multicast group corresponding to the multicast channel of the first media source.

Step 202: Analyze the data stream to obtain at least two port numbers of the first multicast IP address and UDP;

Here, when using the hook function to receive the IP header and the UDP header of the message, the specific implementation of this step includes:

For each message, analyze the IP message header to obtain the first multicast IP address;

The UDP packet header is parsed to obtain a corresponding UDP port number.

That is, each packet refers to a UDP port number.

Step 203: Utilize the first multicast IP address to determine that the received data stream is the data stream of the first media source; utilize different port numbers of UDP to identify each data stream of the first media source;

Here, in actual application, the code rate of each data stream of the first media source may be different; or, when in a VR live broadcast scene, the angle of the scene picture corresponding to each data stream of the first media source different.

Step 204: For at least two data streams received from the first media source, use different UDP port numbers to identify each data stream;

Wherein, the port number utilizing UDP to identify each data flow includes:

A destination port number is encapsulated in the UDP packet header of each data flow, and the destination port numbers of the at least two data flows are different.

Step 205: Based on the second multicast IP address of the first media source, send at least two data streams of the identified first media source.

Specifically, the second multicast IP address corresponding to the first media source is added to the destination address of the IP packet header.

After the second multicast IP address corresponding to the first media source is added to the destination address of the IP message header, at least two data streams of the first media source are presented in the form of IP messages.

In actual application, as a multicast channel intermediate device in a multicast network, generally the multicast group where the first media source is received is different from the corresponding multicast group when it sends out data streams. Correspondingly, the corresponding multicast The group IP addresses are different. That is to say, the first multicast IP address and the second multicast IP address are generally different.

Correspondingly, the embodiment of the present invention provides a method for transmitting data streams, specifically a method for transmitting multi-channel data streams in a multicast group, which is applied to a playback terminal of a multicast channel in a multicast network, as shown in FIG. 3, including the following steps:

Step 301: receiving data stream;

Specifically, the hook function is used to receive the complete message of the multicast data formed by the IP message header and the UDP message header of the message, and at least two data streams of the first media source.

Here, in actual application, before performing this step, the method may also include:

Join the multicast group corresponding to the multicast channel of the first media source based on IGMP by using the multicast IP address corresponding to the first media source.

Specifically, using the multicast IP address corresponding to the first media source to generate an IGMP message;

Sending the IGMP message to the switch; the IGMP message (such as an IGMP join (join) or report (report) message) is used to request to join the multicast group corresponding to the multicast channel of the first media source.

Certainly, when leaving the multicast group corresponding to the multicast channel of the first media source, the multicast IP address corresponding to the first media source can be used to generate an IGMP message; the IGMP message is sent to the switch ; The IGMP message (such as an IGMP leave message) is used to request to leave the multicast group corresponding to the multicast channel of the first media source.

Step 302: analyzing the data flow to obtain at least two port numbers of the multicast IP address and UDP;

Here, when using the hook function to receive the IP header and the UDP header of the message, the specific implementation of this step includes:

For each message, analyze the IP message header to obtain a multicast IP address;

The UDP packet header is parsed to obtain a corresponding UDP port number.

That is, each packet refers to a UDP port number.

Step 303: Use the multicast IP address to determine that the received data flow is the data flow of the first media source; use different UDP port numbers to identify each data flow of the first media source.

Here, in actual application, the code rate of each data stream of the first media source may be different; or, when in a VR live broadcast scene, the angle of the scene picture corresponding to each data stream of the first media source different.

In the data stream transmission method provided by the embodiment of the present invention, for at least two data streams of the first media source, different port numbers of UDP are used to identify each data stream; based on the multicast IP address of the first media source, the identified At least two data streams of the first media source after that are sent out; receive the data stream; analyze the data stream to obtain at least two port numbers of the multicast IP address and UDP; utilize the multicast IP address to determine that the received data stream is the first A data stream of a media source; UDP different port numbers are used to identify each data stream of the first media source, that is to say, when transmitting multiple data streams of a media source, a multicast IP address is used to distinguish different media sources. Different UDP port numbers are used to distinguish a media source, that is, different data streams under the same multicast group, thus greatly reducing the occupied multicast group resources. At the same time, based on the multicast IP address of the first media source, at least two data streams of the identified first media source are sent out, fully complying with IGMP, and having good compatibility with existing networks.

In addition, the multicast IP address corresponding to the first media source is used to join the multicast group corresponding to the multicast channel of the first media source based on IGMP, without using the UDP socket (socket) port resource of the device, It is not limited to the UDP socket port of the device, and directly uses the multicast IP address to interact with the switch. In this way, the occupied multicast group resources are further reduced, and it can fully comply with IGMP, which can be very similar to the existing network. Good compatibility.

In addition, using the hook function, the complete message of the multicast data formed by the IP message header and UDP message header of the received message, and at least two data streams of the first media source can be obtained without going through the protocol stack. With these information, the problem that the common protocol stack cannot support a multicast group socket port cannot support multiple UDP ports is solved, and it has good compatibility with the existing network.

Embodiment two

In order to implement the method of the embodiment of the present invention, this embodiment provides a data stream transmission device, which is set in a multicast channel source device in a multicast network, as shown in FIG. 4 , the device includes:

The first identification module 41 is used for at least two data streams of the first media source, utilizing different port numbers of UDP to identify each data stream;

The first sending unit 42 sends the identified at least two data streams of the first media source based on the IP address of the first media source.

Wherein, the first identification module 41 is specifically configured to: encapsulate a destination port number in the UDP packet header of each data flow, and the destination port numbers of the at least two data flows are different.

Here, in actual application, the code rate of each data stream of the first media source may be different; or, when in a VR live broadcast scene, the angle of the scene picture corresponding to each data stream of the first media source different.

In practical applications, different UDP port numbers may be set as required to identify different data streams of the first media source. For example, assuming that the data stream has three data streams: high-definition, standard-definition, and smooth, you can set three even-numbered port numbers, such as 902, 904, and 906, to identify the high-definition, standard-definition, and smooth three-way data streams according to business needs. road data flow.

The first sending unit 42 is specifically configured to add the multicast IP address corresponding to the first media source to the destination address of the IP packet header. After the multicast IP address corresponding to the first media source is added to the destination address of the IP message header, at least two data streams of the first media source are presented in the form of IP messages.

In practical application, the first identification module 41 may be realized by a processor in the data stream transmission device; the first sending unit 42 may be realized by a transceiver in the data stream transmission device.

Based on this, an embodiment of the present invention also provides a source device, including:

The first processor is used for at least two data streams of the first media source, using different port numbers of the user datagram UDP to identify each data stream;

The first communication interface is configured to send out at least two data streams of the identified first media source based on the multicast IP address of the first media source.

Wherein, the functions of the first processor and the first communication interface have been described in detail above, and will not be repeated here.

Correspondingly, the embodiment of the present invention also provides a data stream transmission device, which is applied to a multicast channel intermediate device in a multicast network, such as a multicast channel accessing a streaming media server (such as a CDN central node, etc.) or its lower level Intermediate equipment (equipment except the playback terminal), as shown in Figure 5, the device includes:

A first receiving unit 51, configured to receive a data stream;

The first parsing unit 52 is configured to parse the data stream to obtain at least two port numbers of the first multicast IP address and UDP;

The first identification unit 53 is configured to utilize the first multicast IP address to determine that the received data stream is the data stream of the first media source; utilize the different port numbers of the UDP to identify each data stream of the first media source;

The second identification module 54 is used for at least two data streams of the first media source received, using different port numbers of UDP to identify each data stream;

The second sending unit 55 is configured to send at least two data streams of the identified first media source based on the second multicast IP address of the first media source.

Wherein, the first receiving unit 51 is specifically used for:

The hook function is used to receive the complete message of the multicast data formed by the IP message header and the UDP message header of the message, and at least two data streams of the first media source.

Here, in actual application, the device may also include:

The first joining unit is configured to use the first multicast IP address corresponding to the first media source to join the multicast group corresponding to the multicast channel of the first media source based on IGMP.

Specifically, the first adding unit uses the first multicast IP address corresponding to the first media source to generate an IGMP message;

The first joining unit sends the IGMP message to the switch; the IGMP message (such as an IGMP join (join) or report (report) message) is used to request to join the multicast channel of the first media source The corresponding multicast group.

Of course, when leaving the multicast group corresponding to the multicast channel of the first media source, the first joining unit may use the first multicast IP address corresponding to the first media source to generate an IGMP message; Send the IGMP message to the switch; the IGMP message (such as an IGMP leave message) is used to request to leave the multicast group corresponding to the multicast channel of the first media source.

The first parsing unit 52 is specifically used for:

For each message, analyze the IP message header to obtain a multicast IP address;

The UDP packet header is parsed to obtain a corresponding UDP port number.

That is, each packet refers to a UDP port number.

In practical application, the code rate of each data stream of the first media source may be different; or, in a VR live broadcast scene, the angles of the scenes corresponding to each data stream of the first media source are different.

Wherein, the second identification module 54 is specifically used for:

A destination port number is encapsulated in the UDP packet header of each data flow, and the destination port numbers of the at least two data flows are different.

The second sending unit 55 is specifically used for:

Add the second multicast IP address corresponding to the first media source to the destination address of the IP packet header.

After the second sending unit adds the second multicast IP address corresponding to the first media source to the destination address of the IP message header, at least two data streams of the first media source are presented in the form of IP messages.

In actual application, as a multicast channel intermediate device in a multicast network, generally the multicast group where the first media source is received is different from the corresponding multicast group when it sends out data streams. Correspondingly, the corresponding multicast The group IP addresses are different. That is to say, the first multicast IP address and the second multicast IP address are generally different.

The first receiving unit 51 and the second sending unit 55 can be implemented by a transceiver in the data stream transmission device; the first parsing unit 52, the first identification unit 53, and the second identification module 54 can be implemented by a Implemented by a processor; the first adding unit may be implemented by a processor in the data streaming device combined with a transceiver.

Based on this, the embodiment of the present invention also provides an intermediate device, such as a CDN node, etc., including:

The second communication interface is used to receive the data stream;

The second processor is used to analyze the data flow, and obtain at least two port numbers of the first multicast IP address and UDP; use the first multicast IP address to determine that the received data flow is the data flow of the first media source; Using different port numbers of UDP to identify each data stream of the first media source; and for at least two data streams of the first media source received, using different port numbers of UDP to identify each data stream;

The second communication interface is further configured to send out at least two data streams of the identified first media source based on the second multicast IP address of the first media source.

Wherein, the functions of the second processor and the second communication interface have been described in detail above, and will not be repeated here.

Correspondingly, an embodiment of the present invention provides a data stream transmission device, which is set as a playback terminal of a multicast channel in a multicast network. As shown in FIG. 6 , the device includes:

The second receiving unit 61 is configured to receive a data stream;

The second parsing unit 62 is configured to parse the data stream to obtain at least two port numbers of the multicast IP address and UDP;

The second identifying unit 63 is configured to use the multicast IP address to determine that the received data flow is the data flow of the first media source; use the different port numbers of the UDP to identify each data flow of the first media source.

Wherein, the second receiving unit 61 is specifically used for:

The hook function is used to receive the complete message of the multicast data formed by the IP message header and the UDP message header of the message, and at least two data streams of the first media source.

Correspondingly, for each packet, the second parsing unit 62 parses the IP packet header to obtain a multicast IP address;

The second parsing unit 62 parses the UDP packet header to obtain a corresponding UDP port number.

That is, each packet refers to a UDP port number.

Here, in actual application, the device may also include:

The second joining unit is configured to use the multicast IP address corresponding to the first media source to join the multicast group corresponding to the multicast channel of the first media source based on IGMP.

Specifically, the second adding unit uses the multicast IP address corresponding to the first media source to generate an IGMP message;

The second adding unit sends the IGMP message to the switch; the IGMP message (such as an IGMP join (join) or report (report) message) is used to request to join the multicast channel of the first media source The corresponding multicast group.

Of course, when leaving the multicast group corresponding to the multicast channel of the first media source, the second joining unit can generate an IGMP message by using the multicast IP address corresponding to the first media source; Sending the IGMP message; the IGMP message (such as an IGMP leave message) is used to request to leave the multicast group corresponding to the multicast channel of the first media source.

In actual application, the second receiving unit 61 can be realized by a transceiver in the data stream transmission device; the second parsing unit 62 and the second identification unit 63 can be realized by a processor in the data stream transmission device; the second The joining unit can be implemented by combining a processor in the data stream transmission device with a transceiver.

Based on this, an embodiment of the present invention also provides a terminal, including:

The third communication interface is used to receive the data stream;

The third processor is used to analyze the data flow to obtain at least two port numbers of the multicast IP address and UDP; use the multicast IP address to determine that the received data flow is the data flow of the first media source; Different port numbers of UDP identify each data stream of the first media source.

Wherein, the functions of the third processor and the third communication interface have been described in detail above, and will not be repeated here.

Embodiment Three

On the basis of the first and second embodiments, this embodiment describes the transmission process of multiple data streams in detail.

As can be seen from the description of Embodiments 1 and 2, in the embodiment of the present invention, when transmitting multiple data streams of a media source, a multicast group (that is, a multicast IP address, corresponding to a multicast routing entry) is used to identify The media sources of relevant multi-channel data streams, such as live channels in OTT, VR live channels, etc., use the UDP port number carried by IP to identify the data stream at the same time, that is, use different UDP port numbers to distinguish a media source different data streams.

Therefore, for the above data stream transmission method, in actual application, the device shown in FIG. 7 can be used to realize the multicast group supporting the transmission of multiple data streams.

As shown in FIG. 7 , the device includes: a multicast user information module, a multicast group management module, and a multicast group multi-channel data stream receiving/sending module.

The functions of each module are described in detail below.

(1) Multicast user information module

The multicast user information module is used to manage multicast user media sources (such as OTT live channels, VR live channels, etc.), each media source uses a multicast group, that is, corresponds to a multicast routing entry, corresponding to a multicast IP address. At the same time, manage multicast IP information and UDP port information used by related multi-channel data streams; multicast IP addresses are used to distinguish different media sources, and UDP port information is used to distinguish data streams under the same multicast group, such as different codes Rate streaming, etc.

(2) Multicast group management module

The multicast group management module is used for interactive processing of multicast IGMP messages between CDN server nodes or terminals and switches, to complete CDN server nodes or terminals to join and leave multicast groups, and to respond to multicast periodic query messages from switches, etc. Function.

In the protocol stacks of general operating systems such as windows and linux, if the host wants to join a multicast group, it needs to create a UDP socket, and then set the IP_ADD_MEMBERSHIP attribute of the UDP socket IP layer, so that the host will send an IGMP-based join to the switch or report message to complete the action of joining a multicast group; if the host wants to exit a multicast group, it is necessary to set the IP_DROP_MEMBERSHIP attribute of the UDP socket IP layer again, so that the host will send an IGMP-based leave message to the switch. To complete the action of leaving the multicast group. It can be seen that the management of multicast groups by general-purpose operating systems such as windows and linux is attached to UDP sockets, and UDP sockets must specify multicast IP addresses and ports to complete the joining and leaving of multicast groups. For the embodiment of the present invention, based on the flow of the existing operating system, receiving multi-channel multicast streams through the UDP socket is a relatively large limitation in itself, so it is necessary to expand the management method of the multicast group.

Therefore, the multicast group management module sends an IGMP join message to the switch based on the multicast group IP address, requesting to join the multicast group, so as to complete the action of the host joining the multicast group. At the same time, the multicast group management module will also receive the IGMP query message of the switch, and report the current multicast group information; regularly send IGMP report messages to the switch to notify the switch that there is a specific multicast group.

It can be seen from the above description that the joining and leaving of a multicast group is no longer limited to the UDP socket port, but directly uses the multicast group IP address to complete the exchange of IGMP messages with the switch. This method is an extension of the existing resident operating system multicast group management application.

(3) Multicast group multi-channel data stream sending module

This module mainly implements sending multiple data streams of the same multicast group. Combining the structures of IP and UDP messages, the multi-channel data stream sending module of the multicast group mainly uses the destination address field of the IP message header and the destination port field of the UDP message header to realize the sending of the multi-channel data streams of the multicast group. The destination address in the IP message header is designated as a multicast IP address. In the UDP message header, different destination ports are encapsulated, and one destination port represents one data stream. For example, in practical applications, different ports represent data streams with different code rates.

(4) Multicast group multi-channel data stream receiving module

The multi-channel data stream receiving module of the multicast group mainly implements receiving multiple data streams contained in the same multicast channel (media source). Specifically, the multicast group multi-channel data flow receiving module receives the bare data message, ie, the message IP message header and UDP message header, and the complete message of the multicast data through the system hook function. Then, the multicast group multi-channel data stream receiving module first analyzes the multicast IP address and the port information representing different data streams according to the multicast message (IP message header and UDP message header); then, according to the multicast user The relevant multicast IP and port information in the information module, that is, the multicast channel information, can be decomposed into different data streams; finally, different streaming media can be distributed.

In the protocol stacks of general-purpose operating systems such as windows and linux, if you want to receive multicast streams, when creating a UDP socket, each multicast group can only support one UDP port, which limits that a UDP socket can only receive For multicast IP and port data packets, the system's ability to use UDP sockets to receive multicast multi-port data packets is limited. However, in the embodiment of the present invention, the hook function directly receives the raw data message, which can solve the problem that the common protocol stack cannot support one multicast Socket and cannot support multiple UDP ports.

Based on the above apparatus, the transmission process of multiple data streams will be described in detail below.

First, as shown in FIG. 8 , a schematic diagram of a network between a multicast channel source device and a multicast channel access server (generally a central node of a CDN) is described. It can be seen from FIG. 8 that the multicast channel source device sends multiple data streams to the switch, and the multicast channel access server obtains multiple data streams from the switch. Specifically, the process includes:

Step 1: the multicast user information module of the multicast channel source device (which can be an encoder or a multicast source channel generation server) establishes a multicast channel, and the multicast group multi-channel data stream sending module (equivalent to the first in the second embodiment) function of the identification module and the first sending unit) to send multicast multi-channel data streams.

Here, if the multi-channel data streams of the multicast are multiple bit rates, such as when generating high-definition, standard-definition, and smooth three-way bit streams, then the multicast group multi-channel data stream sending module uses a multicast IP address to send the multicast Channel code stream, and use different UDP ports to distinguish code streams with different code rates.

Step 2: The multicast user information module of the multicast channel access server establishes a corresponding multicast channel, manages the IP address of the multicast channel, and the corresponding relationship between the channel-related multiple code streams and UDP ports.

Step 3: the multicast group management module of the multicast channel access server sends an IGMP message to the switch to join the multicast group of the channel (equivalent to the function of the first joining unit in embodiment two), so that the node is ready to receive the multicast Source multiplex data stream.

Step 4: the multicast group multi-channel data stream receiving module of the multicast channel access server (equivalent to the functions of the first receiving unit, the first analyzing unit and the first identifying unit in embodiment two) receives the multicast code sent by the switch flow.

Specifically, the multicast group multiplex data stream receiving module receives all multicast data streams provided by the multicast source.

The multicast group multi-channel data stream receiving module of the multicast channel access server uses UDP port numbers to distinguish different data streams, and sends the received data streams to the multicast user information module for corresponding business processing, such as channel processing , to send the multicast code stream to the lower node or terminal.

As shown in Figure 9, when there are lower-level CDN nodes between the multicast channel access server and the terminal, or in other words, when there are at least two CDN nodes between the multicast channel source device and the terminal, the connection between the two CDN nodes The transmission process of the multiple data streams is: the upper-level CDN node sends the multiple data streams to the switch, and the lower-level CDN node obtains the multiple data streams from the switch. Specifically, the process includes:

Step 1: The multicast group multi-channel data stream receiving module of the upper-level CDN node (similar to the above-mentioned multicast channel access server) receives the multi-channel data stream of the multicast source, and the multicast group multi-channel data stream sending module of the upper-level CDN node Send multicast data streams.

Specifically, the multicast group multi-channel data stream sending module of the superior CDN node (equivalent to the functions of the second identification module and the second sending unit in the second embodiment) uses a multicast IP address to send the multicast channel code stream, and Use different UDP ports to distinguish and send different data streams.

Step 2: The multicast user information module of the lower-level CDN node establishes a corresponding multicast channel, and manages the IP address of the multicast channel and the corresponding relationship between the channel-related multiple code streams and UDP ports.

Step 3: The multicast group management module on the lower-level CDN node sends an IGMP message to the switch to join the multicast group of the channel, so that the node is ready to receive multiple data streams from the multicast source.

Step 4: The multicast group multi-channel data stream receiving module of the lower node receives the multicast code stream sent by the switch.

Specifically, the multicast streams received by the multicast data stream receiving module of the lower-level CDN node are all multicast data streams provided by the upper-level CDN node.

The multicast group multi-channel data stream receiving module of the lower-level CDN node uses the UDP port number to distinguish different data streams, and sends the received data stream to the multicast user information module of the lower-level CDN node for corresponding business processing, such as channel processing After that, the multicast code stream is sent to the lower node or terminal.

As shown in FIG. 10 , after reaching the CDN node, the multiple data streams of the multicast group will be transmitted to the terminal. The transmission process of the multiple data streams between the CDN node and the terminal is: the CDN node sends the multiple data streams to the switch, and the terminal obtains the multiple data streams from the home gateway. Taking the terminal as an example of an OTT terminal, the transmission process will be described in detail below.

In the OTT business, the OTT channel needs to support multiple bit rates. In the traditional processing mechanism, OTT terminals (such as OTT set-top boxes or IPADs, etc.) To determine which bit rate to obtain, use Hypertext Transfer Protocol (HTTP) to obtain unicast bit stream.

With the extensive application of OTT channel live broadcast, multicast has the advantage of saving network transmission capacity in the live broadcast service, so the industry is promoting the application of multicast to realize OTT live broadcast, so the scheme of the embodiment of the present invention is adopted to transmit multi-bit rate The bitstream is very efficient.

In the OTT multicast live broadcast service, in order to be compatible with the terminal (usually HTTP unicast), an application (APP) module is generally integrated on the terminal to process multicast and receive multicast streams, and the APP module is connected with the terminal The playback modules still use HTTP to simulate unicast, so it can be understood as a simulated unicast live broadcast between internal modules of the OTT terminal.

In this case, the device shown in FIG. 7 can be integrated in the APP module of the terminal.

The process of multi-channel data stream transmission between CDN nodes and OTT terminals, including:

Step 1: The multicast data stream receiving module of the edge CDN node receives the channel multicast code stream of the upper CDN node.

Here, before step 1 is performed, the edge CDN node has joined the multicast group in the manner described in FIG. 9 .

And the multicast group multi-channel data stream receiving module of the edge CDN node distinguishes data streams of different code rates in the manner described in FIG. 9 .

Step 2: The multicast data stream sending module of the edge CDN node sends the multicast code stream to the OTT terminal.

Here, the multicast code stream sent may have the following two situations:

The first case is that there is sufficient network transmission bandwidth between the edge CDN node and the OTT terminal. In this case, the multicast group multi-channel data stream sending module of the edge CDN node can transmit All data streams are sent to OTT terminals, using one multicast IP address to send multicast channel code streams, and using different UDP ports to distinguish and send code streams with different code rates.

The second situation is: the network transmission bandwidth between the edge CDN node and the OTT terminal is limited, the OTT terminal analyzes its own situation and the network transmission situation, determines the required code rate and stream, and the APP uses control signaling to notify the edge CDN node , then the edge CDN node uses the multicast group to send the required code stream to the OTT terminal. In this case, when it is necessary to switch the code rate, there is no need to switch the multicast group. The APP directly notifies the edge CDN node, and the edge CDN node directly uses the original multicast group to switch and send the code stream of the corresponding code rate.

The processing procedure of the first case is described below.

Step 3: The multicast user information module in the OTT terminal APP establishes a corresponding multicast channel, and manages the IP address of the multicast channel and the corresponding relationship between the channel-related multiple streams and UDP ports.

Step 4: The multicast group management module in the OTT terminal APP sends an IGMP message to the home gateway to join the multicast group of the channel (equivalent to the function of the second joining unit in Embodiment 2), so that the node is ready to receive the multicast source multiple data streams.

Step 4: The multicast group multi-channel data stream receiving module in the OTT terminal APP (equivalent to the functions of the second receiving unit, the second analyzing unit and the second identifying unit in the second embodiment) receives the multicast code sent by the home gateway flow.

Specifically, the multicast code streams received by the multicast group multi-channel data stream receiving module in the OTT terminal APP are all multicast data streams provided by the edge CDN nodes.

The multicast group multi-channel data stream receiving module in the OTT terminal APP uses UDP port numbers to distinguish code streams of different code rates.

Step 5: The multicast group multi-channel data stream receiving module in the OTT terminal APP sends the received code stream to the multicast user information module in the OTT terminal APP, and the multicast user information module in the OTT terminal APP processes the code stream Relevant business processing, such as sending to the relevant decoding module for decoding and playback processing.

That is to say, the multicast group multi-channel data stream receiving module in the OTT terminal APP selects which code stream to use through the multicast user information module in the OTT terminal APP and the decoding module of the terminal, and will send the corresponding The code stream is sent to the decoding module.

In addition, VR panoramic live broadcast is currently a popular business. Multicast technology has natural advantages in live broadcast applications. In panoramic live broadcast, there are situations where scenes from different angles are transmitted using multiple streams. Therefore, VR live broadcast services can also The solution provided by the embodiment of the present invention is adopted. As shown in Figure 11, the transmission process of multiple data streams between the VR live server (which can also be a CDN node) and the VR terminal is: the VR live server sends multiple data streams to the switch, and the terminal obtains multiple data streams from the home gateway. data flow, the process specifically includes:

Step 1: The VR multicast server creates a VR multicast live source, and the multicast group multi-channel data stream sending module of the VR multicast server sends the VR live multicast code stream.

Here, the multicast group multi-channel data stream sending module of the VR multicast server uses one multicast IP address to send the VR multicast channel code stream, and uses different UDP ports to distinguish and send the code stream of scene images from different angles.

Step 2: The multicast user information module of the VR terminal establishes a corresponding multicast channel, manages the IP address of the multicast channel, and the corresponding relationship between the channel-related multiple code streams and UDP ports.

Step 3: The multicast group management module of the VR terminal sends an IGMP message to the home gateway to join the multicast group of the VR channel, and is ready to receive the multicast stream of the VR multicast channel.

Step 4: The multicast data stream receiving module of the VR terminal receives the multicast code stream sent by the home gateway.

Specifically, the multicast group multiplex data stream receiving module receives all multicast data streams of the VR channel provided by the VR multicast server.

The multicast group multi-channel data stream receiving module of the VR terminal uses the UDP port number to distinguish the streams of different angle scenarios.

Step 5: The multicast group multi-channel data stream receiving module of the VR terminal sends the received code stream to the multicast user information module of the VR terminal for corresponding business processing, such as sending it to the relevant decoding module for decoding processing, and implementing VR playback .

As can be seen from the above description, in the solution of the embodiment of the present invention, when transmitting multiple data streams of a media source, a multicast group (that is, a multicast IP address, corresponding to a multicast routing entry) is used to identify a relevant The media sources of multiple data streams, such as live channels in OTT, VR live channels, etc., use the UDP port number carried by IP to identify the data streams, and realize a multicast group to transmit multiple data streams, thereby saving The number of occupied multicast group entries on the relevant device.

Specifically, it is manifested in the following aspects:

1. The solution provided by the embodiments of the present invention can solve the restriction that multi-channel multicast data streams occupy different multicast IP addresses and UDP ports under the same multicast service, and reduce the use of CDN node multicast UDP sockets, that is to say , reducing the occupied multicast IP address and UDP port resources;

2. Directly use the multicast IP address to complete the IGMP message interaction with the switch, does not depend on the operating system of the host, and is no longer limited by the UDP socket port, so it is a good extension of the TCP/IP protocol stack , and fully follow IGMP.

3. The implementation of receiving multiple data streams is a good supplement to the protocol stack, and supports the problem that one multicast group can receive multiple multicast streams.

4. Since the multicast IP address is used to identify the media source, and the multi-channel data streams of the media source are distinguished by UDP ports, in this way, the communication between the server node or the terminal and the switch can be reduced when transmitting multiple data streams. IGMP packet exchange.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (23)

1. A data stream transmission method, characterized in that the method comprises: For at least two data streams of the first media source, use different port numbers of the User Datagram Protocol UDP to identify each data stream; Based on the multicast Internet Protocol IP address of the first media source, at least two data streams of the identified first media source are sent out. 2. The method according to claim 1, characterized in that, utilizing the port number of UDP to identify each data flow, comprising: Encapsulate a destination port number in the UDP packet header of each data flow, and the destination port numbers of the at least two data flows are different; The sending out at least two data streams of the identified first media source based on the multicast IP address of the first media source includes: Add the multicast IP address corresponding to the first media source to the destination address of the IP packet header. 3. The method according to claim 1, wherein the code rate of each data stream of the first media source is different, or the angle of the scene picture corresponding to each data stream of the first media source different. 4. A data stream transmission method, characterized in that the method comprises: receive data stream; Analyzing the data stream to obtain at least two port numbers of the first multicast IP address and UDP; Utilize the first multicast IP address to determine that the data stream received is the data stream of the first media source; utilize the different port numbers of UDP to identify each data stream of the first media source; For at least two data streams of the first media source received, each data stream is identified by a different port number of UDP; Based on the second multicast IP address of the first media source, at least two data streams of the identified first media source are sent out. 5. The method according to claim 4, wherein the receiving data stream comprises: Utilize the hook function to receive the complete message of the multicast data formed by the IP message header and the UDP message header of the message, and at least two data streams of the first media source; Correspondingly, for each message, analyze the IP message header to obtain the first multicast IP address; The UDP packet header is parsed to obtain a corresponding UDP port number. 6. The method according to claim 4, wherein before receiving the data stream, the method further comprises: Using the first multicast IP address corresponding to the first media source, join the multicast group corresponding to the multicast channel of the first media source based on IGMP. 7. The method according to claim 6, wherein, based on IGMP, joining the multicast group corresponding to the multicast channel of the first media source comprises: Using the first multicast IP address corresponding to the first media source to generate an IGMP message; Sending the IGMP message to the switch; the IGMP message is used to request to join the multicast group corresponding to the multicast channel of the first media source. 8. The method according to claim 4, wherein said utilizing the UDP port number to identify each data stream comprises: Encapsulate a destination port number in the UDP packet header of each data flow, and the destination port numbers of the at least two data flows are different; The sending out at least two data streams of the identified first media source based on the second multicast IP address of the first media source includes: Add the second multicast IP address corresponding to the first media source to the destination address of the IP packet header. 9. The method according to claim 4, wherein the code rate of each data stream of the first media source is different, or the angle of the scene picture corresponding to each data stream of the first media source different. 10. A data stream transmission method, characterized in that the method comprises: receive data stream; Analyze the data stream to obtain at least two port numbers of the multicast IP address and UDP; Using the multicast IP address to determine that the received data flow is the data flow of the first media source; using the different port numbers of the UDP to identify each data flow of the first media source. 11. The method according to claim 10, wherein the receiving data stream comprises: Utilize the hook function to receive the complete message of the multicast data formed by the IP message header and the UDP message header of the message, and at least two data streams of the first media source; Correspondingly, for each message, analyze the IP message header to obtain a multicast IP address; The UDP packet header is parsed to obtain a corresponding UDP port number. 12. The method according to claim 10, wherein before receiving the data stream, the method further comprises: Using the first multicast IP address corresponding to the first media source, join the multicast group corresponding to the multicast channel of the first media source based on IGMP. 13. The method according to claim 12, wherein, based on IGMP, joining the multicast group corresponding to the multicast channel of the first media source comprises: Using the first multicast IP address corresponding to the first media source to generate an IGMP message; Sending the IGMP message to the switch; the IGMP message is used to request to join the multicast group corresponding to the multicast channel of the first media source. 14. The method according to claim 10, wherein the code rate of each data stream of the first media source is different, or the angle of the scene picture corresponding to each data stream of the first media source different. 15. A data stream transmission device, characterized in that the device comprises: The first identification module is used for at least two data streams of the first media source, using different port numbers of UDP to identify each data stream; The first sending unit sends the identified at least two data streams of the first media source based on the IP address of the first media source. 16. The device according to claim 15, wherein the first identification module is specifically configured to encapsulate a destination port number in the UDP packet header of each data flow, and the at least two data flows The destination port numbers are different; The first sending unit is specifically configured to add the multicast IP address corresponding to the first media source to the destination address of the IP packet header. 17. A data stream transmission device, characterized in that the device comprises: a first receiving unit, configured to receive a data stream; The first parsing unit is used for parsing the data flow to obtain the first multicast IP address and at least two port numbers of UDP; The first identifying unit is configured to use the first multicast IP address to determine that the received data stream is the data stream of the first media source; utilize the different port numbers of the UDP to identify each data stream of the first media source; The second identification module is used for at least two data streams of the first media source received, using different port numbers of UDP to identify each data stream; The second sending unit is configured to send the identified at least two data streams of the first media source based on the second IP address of the first media source. 18. The device according to claim 17, further comprising: The first joining unit is configured to use the first multicast IP address corresponding to the first media source to join the multicast group corresponding to the multicast channel of the first media source based on IGMP. 19. A data transport stream device, characterized in that the device comprises: a second receiving unit, configured to receive a data stream; The second parsing unit is used for parsing the data flow to obtain at least two port numbers of the multicast IP address and UDP; The second identifying unit is configured to use the multicast IP address to determine that the received data flow is the data flow of the first media source; and use the different port numbers of the UDP to identify each data flow of the first media source. 20. The device of claim 19, further comprising: The second joining unit is configured to use the multicast IP address corresponding to the first media source to join the multicast group corresponding to the multicast channel of the first media source based on IGMP. 21. A source device, characterized in that the device comprises: The first processor is used for at least two data streams of the first media source, using different port numbers of the user datagram UDP to identify each data stream; The first communication interface is configured to send out at least two data streams of the identified first media source based on the multicast IP address of the first media source. 22. An intermediate device, characterized in that the device comprises: The second communication interface is used to receive the data stream; The second processor is used to analyze the data flow, and obtain at least two port numbers of the first multicast IP address and UDP; use the first multicast IP address to determine that the received data flow is the data flow of the first media source; Using different port numbers of UDP to identify each data stream of the first media source; and for at least two data streams of the first media source received, using different port numbers of UDP to identify each data stream; The second communication interface is further configured to send out at least two data streams of the identified first media source based on the second multicast IP address of the first media source. 23. A terminal, characterized in that the terminal comprises: The third communication interface is used to receive the data stream; The third processor is used to analyze the data flow to obtain at least two port numbers of the multicast IP address and UDP; use the multicast IP address to determine that the received data flow is the data flow of the first media source; Different port numbers of UDP identify each data stream of the first media source.