WO2013086671A1

WO2013086671A1 - Rtp media data processing method and device

Info

Publication number: WO2013086671A1
Application number: PCT/CN2011/083824
Authority: WO
Inventors: 王鑫军; 张红昌
Original assignee: 华为技术有限公司
Priority date: 2011-12-12
Filing date: 2011-12-12
Publication date: 2013-06-20
Also published as: CN103503402A

Abstract

The present invention provides an RTP media data processing method and device. A gateway device determines the size of each basic packet through a packaging duration of the basic packet according to a coding/decoding protocol and a coding rate of each basic base in a first RTP payload, so that the gateway device can divide the first RTP payload into at least one basic packet according to the packaging duration of the basic packet and a packaging duration of the first RTP payload, assemble the at least one basic packet obtained through division into a second RTP payload according to the packaging duration of the basic packet and a packaging duration of an RTP payload capable of being received by a receiver device, and send a second IP data packet comprising the second RTP payload to the receiver device. Because the gateway device does not need to add a TC, system resources are saved, and system cost is reduced, thereby solving the problems in the prior art of wasted system resources and increased system cost caused by the fact that the TC is added in the gateway device.

Description

The present invention relates to a data processing technology, and in particular, to a real-time transport protocol (RTT) media data processing method and device. Background technique

With the continuous development of communication technologies, many applications based on Real-time Transport Protocol (RTP), such as: sound on demand, video on demand, video conferencing, Internet telephony, online games, etc., are used for transmission. Media data. In the IP bearer network, the format of the RTP packet is: IP header + User Datagram Protocol (UDP) header + RTP header + RTP payload (that is, RTP media data after encoding processing). In the prior art, an IP packet encapsulating an RTP data packet may be transmitted between two IP carrier networks through a gateway device. Since the packetization duration of the two IP bearers may be inconsistent, the gateway device may decode a packet-length RTP payload of the IP bearer network where the sender device is located by adding a Trans-coder (TC). Processing, and then encoding into another packet-length RTP payload of the IP bearer network where the receiving device is located.

However, due to the addition of TC to the gateway device, system resources are wasted and system costs are increased. Summary of the invention

The embodiment of the invention provides a method and a device for processing RTP media data, which are used to save system resources and reduce system cost.

In one aspect, a method for processing RTP media data is provided, including:

The gateway device receives the first IP data packet that is sent by the sending end device and includes the first RTP payload; the gateway device according to the first RTP payload corresponding to the basic packet packing time of the codec protocol and the first RTP net Generating the first RTP payload into at least one basic packet, the size of each of the basic packets being encoded by the gateway device according to the basic packet packing duration and the encoding of each of the basic packets Rate determination The gateway device assembles the split at least one basic packet into a second RTP payload according to the basic packet packing duration and a packing duration of the RTP payload receivable by the receiving device, and includes the first The second IP data packet of the second RTP payload is sent to the receiving end device.

Another aspect provides a processing device for RTP media data, including:

a receiving unit, configured to receive a first IP data packet that is sent by the sending end device and includes a first RTP payload;

a splitting unit, configured to split the first RTP payload into at least one basic according to a basic packet packing duration of the codec protocol corresponding to the first RTP payload and a packing duration of the first RTP payload a packet, the size of each of the basic packets is determined by the gateway device according to the basic packet packing duration and a coding rate of each of the basic packets;

The assembling unit is configured to assemble the at least one basic package into which the split unit is split into the second RTP payload according to the basic packet packing duration and the packing duration of the RTP payload receivable by the receiving device. And transmitting a second IP data packet including the second RTP payload to the receiving end device.

According to the foregoing technical solution, the gateway device determines the size of each of the basic packets by using a basic packet packing duration according to a codec protocol and an encoding rate of each basic packet in the first RTP payload, so that the gateway device can be configured according to the foregoing basic Decoding the packet length of the packet and the packetization duration of the first RTP payload, splitting the first RTP payload into the at least one basic packet, and according to the foregoing packet packing duration and the packing duration of the RTP payload receivable by the receiving device And assembling the split at least one basic packet into a second RTP payload, and sending the second IP data packet including the foregoing second RTP payload to the receiving end device, because the gateway device does not need to increase the TC, thereby saving The system resources reduce the system cost, and solve the problem of waste of system resources and increase of system cost caused by the addition of the TC by the gateway device in the prior art.

In addition, in the prior art, the RTP payload of a packetization duration of the IP bearer network where the sender is located is decoded, and then encoded into another RTP payload of the packet length of the IP bearer network where the receiver is located, The voice quality causes a certain damage. Generally, the encoding or decoding MOS value is reduced by about 0.2 to 0.3. Therefore, the technical solution provided by this embodiment can effectively improve the voice quality. DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic flowchart of a method for processing RTP media data according to an embodiment of the present invention; and FIG. 2 is a schematic structural diagram of a device for processing RTP media data according to another embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic flowchart of a method for processing RTP media data according to an embodiment of the present invention. As shown in FIG. 1, the method for processing RTP media data in this embodiment may include:

101. The gateway device receives a first IP data packet that is sent by the sending end device and includes a first RTP payload.

102. The foregoing gateway device splits the first RTP payload into at least one basic packet according to a basic packet packing duration of the codec protocol corresponding to the first RTP payload and a packing duration of the first RTP payload. The size of the foregoing basic packet is determined by the foregoing gateway device according to the foregoing basic packet packing duration and the encoding rate of each of the basic packets;

The foregoing codec protocol may include, but is not limited to, G.71 1 protocol, G.723 protocol, G.726 protocol, G.729 protocol, G.722 protocol, Adaptive Multi-Rate (AMR). Codec protocol or Enhanced Variable Rate Coder (EVRC) protocol.

Further, the gateway device may further determine the size of each of the basic packets according to the basic packet packing duration and the encoding rate of each of the basic packets.

The first IP data packet in the embodiment may further include header data, such as a User Plane Protocol (UP) header or an RFC3267 header. The foregoing header data is used to indicate an encoding rate of each of the basic packets. Accordingly, the gateway device may further determine, according to the foregoing header data, a coding rate of each of the basic packets.

103. The foregoing gateway device assembles the split at least one basic packet into a second RTP payload according to the foregoing basic packet packing duration and a packing duration of the RTP payload receivable by the receiving device, and includes the foregoing second RTP. The second IP packet of the payload is sent to the above receiving device.

The execution subject gateway device of the foregoing 101 to 103 may be a device such as a media gateway (MGW) or a home gateway.

In this embodiment, the gateway device determines the size of each of the basic packets according to the basic packet packing duration of the codec protocol and the encoding rate of each basic packet in the first RTP payload, so that the gateway device can be configured according to the basic packet. The packetization duration and the packetization duration of the first RTP payload are split into the at least one basic packet, and according to the basic packet packing duration and the packetization duration of the RTP payload receivable by the receiving device, Assembling the split at least one basic packet into a second RTP payload, and transmitting the second IP data packet including the foregoing second RTP payload to the receiving end device, since the gateway device does not need to increase the TC, thereby saving The system resources reduce the system cost, and solve the problem of waste of system resources and increase of system cost caused by the addition of the TC by the gateway device in the prior art.

In addition, in the prior art, the RTP payload of a packetization duration of the IP bearer network where the sender is located is decoded, and then encoded into another RTP payload of the packet length of the IP bearer network where the receiver is located, The voice quality causes a certain damage. Generally, the encoding or decoding MOS value is reduced by about 0.2 to 0.3. Therefore, the technical solution provided by this embodiment can effectively improve the voice quality.

In order to make the method provided by the embodiment of the present invention clearer, the G.729 protocol and the AMR protocol applicable to the 2G network will be exemplified below.

For example, for a codec mode that uses a single rate for RTP payload transmission, for example: G.729 protocol, the packet length of the first RTP payload sent by the sender device is 20 milliseconds (ms), and the receiving device receives The second RTP payload has a packing time of 40ms. The gateway device can determine the size of each basic packet (8000 χ 0.01 ) / 8 = 10 bytes according to the basic packet packing time of the G.729 protocol of 10 ms and the encoding rate of each basic packet of 8 kbits per second ( bps ). So that the gateway device splits the first RTP payload into two basic packets according to the basic packet packing time of the G.729 protocol of 10 ms and the first RTP payload of 20 ms, and the size of each basic packet is 10byte. Then, the gateway device may split the split four basic packets (ie, the two first RTP payloads according to the basic packet packing duration of 10 ms and the packetization duration of the second RTP payload received by the receiving device by 40 ms. The four basic packages are assembled into a second RTP payload (each basic packet is 10 bytes in size), and a second IP packet containing the second RTP payload described above is transmitted to the receiving device.

It can be understood that, in this embodiment, the receiving end device parses and obtains a detailed description of the RTP media data included in the second IP data packet, and can refer to the RTP packet of the receiving end device with the IP header and the UDP header in the prior art. Related content of the processing, for example: First, the IP header is removed from the IP layer and sent to the UDP layer, then the UDP header is removed at the UDP layer, and finally the RTP packet (the RTP header and the RTP payload) is parsed to obtain the RTP media data. Let me repeat.

For example, for the codec mode of the RTP payload transmission using multiple rates, for example, the AMR protocol applicable to the 2G network, the packet length of the first RTP payload sent by the sender device is 40 ms, and the receiving device receives The second RTP payload has a packaging time of 60 ms. The gateway device may according to the basic packet packing time of the AMR protocol of 20 ms and the encoding rate of the corresponding basic packet indicated by the RFC 3267 header data, for example: the encoding rate of the first basic packet is 12.2 kbps, and the encoding rate of the second basic packet is 10.2. Kbps, the encoding rate of the third basic packet is 10.2 kbps, and the encoding rate of the fourth basic packet is 10.2 kbps, and the size of the first basic packet is determined to be (12200 X 0.02) / 8 = 30.5 bytes, the second basic packet The size is (10200 χ 0.02) / 8 = 25.5 bytes, the size of the third basic packet is (10200 0.02) / 8 = 25.5byte, and the size of the fourth basic packet is (10200 0.02) / 8 = 25.5byte, The gateway device splits the first RTP payload into two basic packets according to the basic packet packing time of the AMR protocol of 20 ms and the first RTP payload, and the basic packet size is 30.5 bytes. The size of the packet is 25.5 bytes. Then, the gateway device may split the split three basic packets (ie, the two first RTP payloads according to the basic packet packing time of 20 ms and the second RTP payload received by the receiving device for 60 ms. Three of the four basic packages are assembled into a second RTP payload (the size of the first basic packet is 30.5 bytes, the size of the second basic packet is 25.5 bytes, and the size of the third basic packet is 25.5 bytes. And transmitting a second IP data packet including the foregoing second RTP payload to the receiving end device.

It can be understood that, in this embodiment, the receiving end device parses and obtains a detailed description of the RTP media data included in the second IP data packet, and can refer to the receiving end device pair with the IP header in the prior art. And the related content of the RTP packet processed by the UDP header, for example: First, the IP header is removed from the IP layer and sent to the UDP layer, then the UDP header is removed at the UDP layer, and finally the RTP packet (RTP header, RFC3267 header, and RTP payload) is parsed. , get RTP media data, no longer repeat them here.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

2 is a schematic structural diagram of a processing device for RTP media data according to another embodiment of the present invention. As shown in FIG. 2, the processing device for RTP media data in this embodiment may include a receiving unit 21, a splitting unit 22, and an assembling unit. twenty three. The receiving unit 21 is configured to receive a first IP data packet that is sent by the sending end device and includes a first RTP payload. The splitting unit 22 is configured to use a basic packet packing duration of the codec protocol corresponding to the first RTP payload. The packetization duration of the first RTP payload is split into the at least one basic packet, and the size of each of the basic packets is determined by the gateway device according to the basic packet packing duration and the encoding of each of the basic packets. Rate determining; the assembling unit 23 is configured to assemble the at least one basic packet into which the splitting unit is split into the second RTP payload according to the foregoing packet packing duration and the packing duration of the second RTP payload received by the receiving device. And transmitting a second IP data packet including the foregoing second RTP payload to the receiving end device.

The function of the gateway device in the embodiment corresponding to the foregoing FIG. 1 can be implemented by the RTP media data processing device provided in this embodiment.

Further, the splitting unit 22 in this embodiment may be further configured to determine the size of each of the basic packets according to the basic packet packing duration and the encoding rate of each of the basic packets.

The first IP data packet in the embodiment may further include header data, for example, a UP header or an RFC3267 header, where the header data is used to indicate a coding rate of each of the basic packets; accordingly, The sub-unit 22 may be further configured to determine a coding rate of each of the basic packets according to the foregoing header data.

In this embodiment, the processing device of the RTP media data is processed by the splitting unit according to the codec protocol. The basic packet packing duration and the encoding rate of each basic packet in the first RTP payload received by the receiving unit, determining the size of each of the basic packets, so that the splitting unit can be based on the basic packet packing duration and the first RTP. The first RTP payload is split into the at least one basic packet, and the assembly unit splits the packet length according to the basic packet packing duration and the second RTP payload received by the receiving device. The at least one basic packet is assembled into a second RTP payload, and the second IP data packet including the second RTP payload is sent to the receiving end device, because the gateway device does not need to increase the TC, thereby saving system resources and reducing The system cost solves the problem of waste of system resources and increase of system cost caused by the addition of the TC by the gateway device in the prior art.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

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

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

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional units are stored in a storage medium and include a number of instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform some of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. Medium.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Claim

A method for processing RTP media data, comprising:

The gateway device receives the first IP data packet that is sent by the sending end device and includes the first RTP payload; the gateway device according to the first RTP payload corresponding to the basic packet packing time of the codec protocol and the first RTP net Generating the first RTP payload into at least one basic packet, the size of each of the basic packets being encoded by the gateway device according to the basic packet packing duration and the encoding of each of the basic packets Rate determination

The gateway device assembles the split at least one basic packet into a second RTP payload according to the basic packet packing duration and a packing duration of the RTP payload receivable by the receiving device, and includes the first The second IP data packet of the second RTP payload is sent to the receiving end device.

2. The method according to claim 1, further comprising:

The gateway device determines a size of each of the basic packets according to the basic packet packing duration and an encoding rate of each of the basic packets.

The method according to claim 2, wherein the first IP data packet further includes header data, and the header data is used to indicate a coding rate of each of the basic packets, the gateway Before determining the size of each of the basic packets according to the basic packet packing duration and the encoding rate of each of the basic packets, the device further includes:

The gateway device determines a coding rate of each of the basic packets according to the header data.

4. A processing device for RTP media data, comprising:

5. The device according to claim 4, wherein the splitting unit is further used for The size of each of the basic packets is determined according to the basic packet packing duration and the encoding rate of each of the basic packets.

The device according to claim 5, wherein the first IP data packet further includes header data, and the header data is used to indicate a coding rate of each of the basic packets, where the Subunits are also used

A coding rate of each of the basic packets is determined based on the header data.