CN111541514B

CN111541514B - Message transmission method and device

Info

Publication number: CN111541514B
Application number: CN202010232708.5A
Authority: CN
Inventors: 张锦辉; 黄一宏; 魏启坤; 符秋杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-06-29
Filing date: 2015-06-29
Publication date: 2021-10-26
Anticipated expiration: 2035-06-29
Also published as: WO2017000836A1; CN111541514A; CN106330713A; CN106330713B

Abstract

The embodiment of the invention provides a message transmission method and a message transmission device, relates to the technical field of communication, and can reduce access delay and ensure message transmission quality. The method comprises the following steps: after receiving a data stream, classifying messages in the data stream according to a preset rule to obtain at least two types of messages; processing a first type of message in an interleaving mode, and processing other types of messages except the first type of message in a non-interleaving mode, wherein the priority of the first type of message is a first priority, and the first priority is higher than the priorities of the other types of messages; and sending the processed various types of messages to a receiver.

Description

Message transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a packet.

Background

With the increasing development of network technology, more and more videos are transmitted on the internet nowadays, and the videos become a main part of current and future network traffic. With the further improvement of the demand of people, the video definition is transited from standard definition and high definition to 4K (4K resolution), the demand for bandwidth is developed from 4Mbps and 8Mbps to 50Mbps and 100Mbps, and the demand for network delay is higher and higher. Tests show that the End-to-End (English: End to End, for short: E2E) delay for bearing the 4K video is less than 25ms to ensure good playing experience, and the delay requirement for accessing a network is less than 5 ms.

In the existing network, the access network usually adopts the Digital Subscriber Line (DSL for short) access technology. In order to resist the interference of impulse noise, a DSL system generally adopts a Forward Error Correction (FEC) coding technique and an interleaving technique to transmit a message, so that the access delay of the DSL system is approximately 15 ms. Among the 15ms access delays of DSL systems, delays of 12ms or more are introduced by interleaving.

In order to reduce the access delay, one method is to not introduce an interleaving technique during message transmission, but not introduce the interleaving technique, which results in that the access network has no capability of resisting the interference of impulse noise, increase the packet error rate, and reduce the transmission quality of the message. In order To reduce The access delay and ensure The transmission quality of The message, a method of upgrading The DSL access To a Fiber To The Home (FTTH) access may be adopted, but The method has a high cost and is also low in applicability in an actual application scenario. Therefore, there is a need for a new message transmission method for reducing access delay and ensuring message transmission quality.

Disclosure of Invention

Embodiments of the present invention provide a method and an apparatus for transmitting a packet, which solve the problem that the transmission quality of the packet cannot be guaranteed while the access delay is reduced.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a packet transmission method, where the method includes:

after receiving a data stream, classifying messages in the data stream according to a preset rule to obtain at least two types of messages;

processing a first type of message in an interleaving mode, and processing other types of messages except the first type of message in a non-interleaving mode, wherein the priority of the first type of message is a first priority, and the first priority is higher than the priorities of the other types of messages;

and sending the processed various types of messages to a receiver.

In a first possible implementation manner of the first aspect, the processing, in a non-interleaving manner, on the other types of packets except the first type of packet specifically includes:

if the priority of the second type of message is a second priority, Forward Error Correction (FEC) coding is carried out on the second type of message, wherein the second priority is superior to the first priority;

and if the priority of the third type of message is a third priority, not processing the third type of message, wherein the third priority is smaller than the second priority and smaller than the first priority.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, if the priority of the second type of packet is a second priority, performing forward error correction FEC encoding on the second type of packet specifically includes:

if the priority of the second type message is the second priority, caching the second type message;

judging whether the number of the first type messages is smaller than a preset threshold value or not;

if the number of the first type messages is equal to a preset threshold value, Forward Error Correction (FEC) coding is carried out on the second type messages in the cache;

and if the number of the first type messages is smaller than a preset threshold value and the difference between the preset threshold value and the number of the first type messages is N, processing N second type messages in the cache in an interleaving mode, and performing FEC encoding on the second type messages except the N second type messages in the cache.

In a third possible implementation manner of the first aspect, the processing the first type of packet in an interleaving manner specifically includes:

and if the number of the first type messages is smaller than a preset threshold value within a preset time period, and the difference between the preset threshold value and the number of the first type messages is N, selecting N second type messages from the cache so as to carry out interleaving at once.

With reference to the first aspect or any one of the first possible implementation manner to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, if the first type of packet is a real-time transport protocol RTP packet, the interleaved RTP packet at least includes an interleaving identification field;

wherein the interleaving identification field comprises:

an Interflag field contained in a message header of the interleaved RTP message is used for indicating that the current message is interleaved;

alternatively, the first and second electrodes may be,

an Interflag field contained in payload of the interleaved RTP message;

alternatively, the first and second electrodes may be,

and a first field contained in the payload type of the interleaved RTP packet, where the first field is used to indicate that the current packet is interleaved.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the sending the processed various types of messages to the receiver includes:

and sending the interleaved RTP message to a receiver.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the sending the processed various types of messages to the receiver further includes:

and sending an InterType and an InterParameter to a receiver, wherein the InterType is used for indicating an interleaving type adopted when the RTP message is interleaved, and the InterParameter is used for indicating specific interleaving parameters.

In a second aspect, an embodiment of the present invention provides a packet transmission method, where the method includes:

after receiving a data stream, classifying messages in the data stream to obtain at least two types of messages;

if the type of the message is a first type, performing de-interleaving processing on the message, wherein the priority of the message of the first type is a first priority, and the first priority is higher than the priorities of the messages of other types;

if the type of the message is a second type, performing Forward Error Correction (FEC) decoding on the message, wherein the priority of the message of the second type is a second priority, and the second priority is superior to the first priority;

and restoring the processed various types of messages into initial messages.

In a first possible implementation manner of the second aspect, the method further includes:

and if the type of the message is a third type, not processing the message of the third type, wherein the priority of the message of the third type is a third priority, and the third priority is smaller than the second priority and smaller than the first priority.

In a second possible implementation manner of the second aspect, the method further includes:

performing error code correction processing on the deinterleaved first type message;

and carrying out error code correction processing on the FEC decoded second type message.

With reference to the second aspect or any one of the first possible implementation manner of the second aspect to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, if the packet of the first type is an RTP packet, the RTP packet at least includes an interleaving identification field;

wherein, the RTP message of the interleaving identification field at least contains a field used for representing the current message to be interleaved, and the method comprises the following steps:

an Interflag field contained in a message header of the RTP message, wherein the Interflag is used for indicating that the current message is interleaved;

alternatively, the first and second electrodes may be,

an InterFlag field contained in payload of the RTP message;

alternatively, the first and second electrodes may be,

the payload type of the RTP packet at least contains a first field, and the first field is used for indicating that the current packet is interleaved.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, if the first type packet is an RTP packet, the method further includes:

receiving InterType and InterP Parameter fields, wherein the InterType is used for indicating the interleaving type of the RTP message, and the InterP Parameter is used for indicating specific interleaving parameters.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the performing deinterleaving processing on the packet of the first type specifically includes:

determining a de-interleaving technology according to the InterType and the Inter Parameter field;

and performing deinterleaving processing on the RTP message by adopting the deinterleaving technology.

In a third aspect, an embodiment of the present invention provides a transmitter, including:

a receiving unit for receiving a data stream;

the classification unit is used for classifying the messages in the data stream received by the receiving unit according to a preset rule to obtain at least two types of messages;

the processing unit is used for processing the messages of the first type in an interleaving mode and processing the messages of other types except the messages of the first type in a non-interleaving mode, wherein the priority of the messages of the first type is a first priority, and the first priority is higher than the priorities of the messages of the other types;

and the sending unit is used for sending the various types of messages processed by the processing unit to a receiver.

In a first possible implementation manner of the third aspect, the processing unit is specifically configured to perform forward error correction FEC coding on a second type of packet if the priority of the second type of packet is a second priority, where the second priority is better than the first priority, and is specifically configured to not process a third type of packet if the priority of the third type of packet is a third priority, where the third priority is smaller than the second priority and smaller than the first priority.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the transmitter further includes a storage unit;

the storage unit is used for caching the second type of message if the priority of the second type of message is a second priority;

the transmitter further includes a judgment unit;

the judging unit is used for judging whether the number of the first type messages is smaller than a preset threshold value or not;

the processing unit is configured to perform forward error correction FEC coding on the second type of packet in the storage unit if the number of the first type of packet is equal to a preset threshold, and to perform interleaving processing on N second type of packets in the storage unit and perform FEC coding on the second type of packets except the N second type of packets in the storage unit if the number of the first type of packet is smaller than the preset threshold and a difference between the preset threshold and the number of the first type of packet is N, where N is greater than or equal to 1.

In a third possible implementation manner of the third aspect, the processing unit is specifically configured to select N second type packets from the storage unit to perform interleaving immediately if, in a preset time period, the number of first type packets in the processing unit is smaller than the preset threshold, and a difference between the preset threshold and the number of first type packets in the processing unit is N.

With reference to the third aspect or any one of the first possible implementation manner to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, if the first type of packet is a real-time transport protocol RTP packet, the interleaved RTP packet at least includes an interleaving identification field;

wherein the interleaving identification field comprises:

alternatively, the first and second electrodes may be,

an Interflag field contained in payload of the interleaved RTP message;

alternatively, the first and second electrodes may be,

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the sending unit is specifically configured to send the interleaved RTP packet to a receiver.

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the sending unit is further specifically configured to send an mtetype and an Inter Parameter to a receiver, where the mtetype is used to indicate an interleaving type used when interleaving the RTP packet, and the Inter Parameter is used to indicate a specific interleaving Parameter.

In a fourth aspect, an embodiment of the present invention provides a receiver, including:

a receiving unit, configured to receive a data stream, where the data stream includes at least two types of packets;

a classifying unit, configured to classify the packets in the data stream received by the receiving unit to obtain at least two types of packets;

a processing unit, configured to perform de-interleaving processing on a packet if the type of the packet is a first type, where the priority of the packet of the first type is a first priority higher than the priorities of other types of packets, and perform forward error correction FEC decoding on the packet if the type of the packet is a second type, where the priority of the packet of the second type is a second priority, and the second priority is superior to the first priority, and is used to restore the processed various types of packets to an initial packet.

In a first possible implementation manner of the fourth aspect, the processing unit is further configured to not process the packet of the third type if the type of the packet is a third type, where a priority of the packet of the third type is a third priority, and the third priority is smaller than the second priority and smaller than the first priority.

In a second possible implementation manner of the fourth aspect, the processing unit is further configured to perform error correction processing on the deinterleaved first type packet, and further configured to perform error correction processing on the FEC-decoded second type packet.

With reference to the fourth aspect or any one of the first possible implementation manner to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, if the first type of packet is a real-time transport protocol RTP packet, the RTP packet at least includes an interleaving identification field;

wherein the fabric identification field comprises:

alternatively, the first and second electrodes may be,

an InterFlag field contained in payload of the RTP message;

alternatively, the first and second electrodes may be,

and a first field contained in the payload type of the RTP packet, where the first field is used to indicate that the current packet is interleaved.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the receiving unit is further configured to receive an mtype and an Inter Parameter field if the packet of the first type is an RTP packet, where the mtype is used to indicate an interleaving type of the RTP packet, and the Inter Parameter is used to indicate a specific interleaving Parameter.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the determining unit is specifically configured to determine a deinterleaving technique according to the mtype and the Inter Parameter field received by the receiving unit;

the processing unit is specifically configured to perform deinterleaving processing on the RTP packet by using the deinterleaving technique determined by the determining unit.

The embodiment of the invention provides a message transmission method and a device, wherein a sender classifies messages in a received data stream according to a preset rule after receiving the data stream to obtain at least two types of messages, then the sender processes the first type of messages in an interleaving mode and processes other types of messages except the first type of messages in a non-interleaving mode, wherein the priority of the first type of messages is higher than that of the other types of messages, and finally, the sender sends the processed various types of messages to a receiver so that the receiver processes the processed various types of messages in respective corresponding processing modes.

Through the scheme, after the transmitter receives the data stream, the transmitter does not need to carry out interleaving processing on all the received data streams, but classifies the messages in the data streams according to the preset rules and then carries out different processing on various types of messages, wherein the transmitter only carries out interleaving processing on the first type of message with the highest priority in the data streams, so that the most important message in the data streams can be ensured not to be lost, the transmission quality of the message is ensured, and the time delay caused by interleaving can be effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

Fig. 1 is a first schematic flow chart of a message transmission method according to an embodiment of the present invention;

fig. 2 is a second schematic flow chart of a message transmission method according to an embodiment of the present invention;

fig. 3 is a third schematic flow chart of a message transmission method according to an embodiment of the present invention;

fig. 4 is a first schematic structural diagram of a transmitter according to an embodiment of the present invention;

fig. 5 is a second schematic structural diagram of a transmitter according to an embodiment of the present invention;

fig. 6 is a first schematic structural diagram of a receiver according to an embodiment of the present invention;

fig. 7 is a second schematic structural diagram of a transmitter according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a receiver according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of the invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, interfaces, techniques, etc., in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

The various techniques described herein are applicable to message transmission in the access network of a DSL system, as well as in other networks where discrete packet loss is likely to occur.

Example one

The invention provides a message transmission method, as shown in fig. 1, the method includes:

s101, after receiving the data stream, the sender classifies the messages in the data stream according to a preset rule to obtain at least two types of messages.

The preset rule may be to classify the packets according to a packet header of each packet in the data stream, where the packet header of each packet carries information indicating a packet type, or may be to classify the packets according to a field indicating a packet priority in each packet in the data stream, which is not specifically limited in the embodiment of the present invention.

Illustratively, the predetermined rule is to classify the IP packet according to a Type-Of-Service (TOS) field Of the IP packet, wherein the TOS field includes a priority subfield.

The preset rule may also be a classification according to an NAL Type/Payload Type in a Real-time Transport Protocol (RTP) packet Payload specified in standard RFC6184, where the NAL Type/Payload Type carries specific information indicating a video frame.

Specifically, after receiving the data stream, the transmitter classifies the messages in the data stream according to a preset rule to obtain at least two types of messages, so that the transmitter can process the different types of messages in different manners.

The determination of the message type in the embodiment of the present invention may be determined by the sender according to actual requirements.

Illustratively, when a video is encoded, the video is encoded into several groups of Pictures (GOPs), and each GOP has different Frame types, such as a basic image Frame (I Frame), an immediate refresh (IDR) Frame, a forward-Predictive-coded Frame (P Frame), a Bi-directional-Predictive-interpolated Frame (B Frame), and so on.

The I frame or the IDR frame is referred to when encoding and decoding other frames in the GOP, the P frame is referred to when encoding and decoding most of the B frames, and the B frame may or may not be referred to by other B frames.

Thus, when a video is transmitted in a network, if one or more messages are lost in an I frame or an IDR frame, the decoding of the whole GOP is influenced; if a P frame is lost, decoding of a B frame referring to the P frame is affected; if a B frame is lost, decoding of the B frame that references the B frame is affected, and if the B frame is not referenced, decoding of the B frame is affected only.

Therefore, if the data stream received by the sender is a video stream, the sender may analyze the payload of each packet in the data stream, and classify the packets into three types, i.e., high, medium, and low, according to the payload of each packet.

Specifically, the transmitter may designate an I frame, an IDR frame, or a packet containing a Video Parameter Set (VPS), an image Parameter Set (PPS), a Sequence Parameter Set (SPS), a Program Association Table (PAT), or a Program Map Table (PMT) as a high importance packet, designate a P frame and a referred B frame as a medium importance packet, and designate other packets as a low importance packet.

The relevant information of PAT and PMT can refer to the standard ISO-IEC 13818-1.

Alternatively, the transmitter designates an I frame, an IDR frame, or a packet containing PAT, PMT, VPS, PPS, or SPS content as a high importance packet, designates a P frame as a medium importance packet, and designates a packet of other content as a low importance packet.

S102, the sender processes the first type of message in an interleaving mode, and processes other types of messages except the first type of message in a non-interleaving mode.

The priority of the first type of message is higher than the priority of the other types of messages.

The interleaving mode is adopted to process the message, which can generally solve the interference of impulse noise to a physical line, recover the message influenced by the impulse and further ensure the transmission quality of the message.

After classifying the messages in the data stream, the transmitter processes the messages of the highest priority in an interleaving manner, that is, the transmitter processes the messages of the first type in an interleaving manner, so that the transmission quality of the messages of the first type can be ensured, and the influence on the messages of other types due to the loss of the messages of the first type is reduced.

Optionally, the transmitter in the embodiment of the present invention may use any one of existing interleaving techniques to process the first type of packet, which is not limited in the embodiment of the present invention.

For example, the transmitter may process the first type of packet by using a linear interleaving technique, may process the first type of packet by using a convolutional interleaving technique, and may process the first type of packet by using a pseudo-random interleaving technique.

In addition, the transmitter may also perform Forward Error Correction (FEC) coding on the first type of packet while processing the first type of packet in an interleaving manner, so as to protect the transmission quality of the first type of packet.

Specifically, the transmitter performs interleaving processing on the first type of packet in its own processor.

The processor may be set up separately in the transmitter, or may be implemented integrally on a certain module in the transmitter. The processor may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention.

Preferably, the processor in the embodiment of the present invention is an interleaver.

Further, if the number of the messages in the processor of the transmitter is smaller than a preset threshold within a preset time period, and the difference between the preset threshold and the number of the messages in the processor is N, selecting N messages from the buffer so that the processor of the transmitter can immediately interleave, wherein the second type of message is stored in the buffer of the transmitter, and the priority of the message is superior to that of the first type of message.

The sender processes the messages of other types except the first type in a non-interleaving mode.

Specifically, if the priority of the second type of packet is the second priority, and the second priority is superior to the first priority, the sender may perform FEC encoding on the second type of packet; if the priority of the third type of packet is a third priority, where the third priority is smaller than the second priority and smaller than the first priority, the sender may not process the third type of packet.

The transmitter in the embodiment of the present invention may use any one of existing FEC coding techniques to process the second type of packet, which is not limited in the embodiment of the present invention.

Specifically, if the priority of the second type of message is the second priority, the sender caches the second type of message first, and then judges whether the number of messages in the processor of the sender is smaller than a preset threshold.

And if the number of the messages in the processor of the sender is equal to the preset threshold value, the sender carries out FEC encoding on the second type of messages in the cache.

If the number of the messages in the processor of the sender is smaller than the preset threshold and the difference between the preset threshold and the number of the messages in the processor of the sender is N, the sender processes the N second-type messages in the cache in an interleaving mode and performs FEC coding on the second-type messages except the N second-type messages in the cache, so that the average time delay can be further shortened.

It should be noted that the manner in which the transmitter processes other types of messages in the embodiment of the present invention is not limited to the above processing manners.

S103, the transmitter transmits the processed various types of messages to the receiver.

Specifically, if a sender does not process a certain type of message, the sender sends the message of the type directly to a receiver.

If the first type of message is an RTP message, the RTP message interleaved by the transmitter at least includes an interleaving identification field, where the interleaving identification field carries an interleaving identification used to indicate that the current message has been interleaved, and thus, after receiving the RTP message, the receiver can determine that the received RTP message needs de-interleaving processing according to the interleaving identification field in the RTP message.

Specifically, the interleaving identification field includes:

an Interflag field contained in a message header of the interleaved RTP message, wherein the Interflag is used for indicating that the current message is interleaved;

alternatively, the first and second electrodes may be,

an Interflag field contained in payload of the interleaved RTP message;

alternatively, the first and second electrodes may be,

a first field included in the payload type of the interleaved RTP packet, where the first field is used to indicate that the current packet is interleaved, and a name of the first field is not specifically limited in the embodiment of the present invention.

Specifically, while the transmitter sends the interleaved RTP packet to the receiver, the transmitter also sends the mtype and the Inter Parameter to the receiver through the signaling channel, so that the receiver determines a specific de-interleaving technique according to the two fields, and restores the RTP packet by using the determined de-interleaving technique.

The Inter type is used for indicating an interleaving type adopted when the transmitter interleaves the RTP packet, and the Inter Parameter is used for indicating a specific interleaving Parameter.

It should be noted that the transmitter may use any existing protocol to transmit the mtype and Inter Parameter fields, which is not specifically limited in this embodiment of the present invention.

Illustratively, the sender transmits the Inter type and Inter Parameter fields using a Real-time Transport Control Protocol (RTCP), or the sender transmits the Inter type and Inter Parameter fields using a Session Initiation Protocol (SIP).

The embodiment of the invention provides a message transmission method, wherein a sender classifies messages in a received data stream according to a preset rule after receiving the data stream to obtain at least two types of messages, then processes the first type of messages in an interleaving mode, and processes other types of messages except the first type of messages in a mode different from the interleaving mode, wherein the priority of the first type of messages is higher than the priority of the other types of messages, and finally, the sender sends the processed various types of messages to a receiver so that the receiver processes the processed various types of messages in respective corresponding processing modes.

Example two

The present invention provides a message transmission method, as shown in fig. 2, the method includes:

s201, after receiving the data stream, the receiver classifies the messages in the data stream to obtain at least two types of messages.

The data stream received by the receiver is sent to the receiver by the sender, and the data stream in the embodiment of the invention is sent after the sender processes different types of messages in the data stream in different modes, so that after the receiver receives the data stream, the messages in the data stream are classified to obtain at least two types of messages, and then different processing modes are adopted to process different types of messages.

Optionally, after receiving the data stream, the receiver determines the type of the packet according to the format of the packet or a packet header, where the packet header carries information indicating which processing method the sender uses to process the packet.

S202, if the type of the message is the first type, the receiver conducts de-interleaving processing on the message.

The priority of the first type of message is a first priority, and the first priority is higher than the priorities of other types of messages.

After receiving the data stream, the receiver classifies the messages in the data stream to obtain at least two types of messages, and then the receiver processes each type of message by adopting a respective processing mode.

It can be understood that the type of the message in the embodiment of the present invention is substantially determined by the sender, and the processing manner in the embodiment of the present invention corresponds to the processing manner of the sender for each type of message.

Specifically, if the type of the message is the first type, the receiver performs deinterleaving processing on the message.

It should be noted that, the receiver in the embodiment of the present invention may use any existing deinterleaving technique to process the first type of packet, which is not limited in this embodiment of the present invention.

Further, the receiver performs error correction processing on the deinterleaved first type message.

Illustratively, if the first type of packet received by the receiver is an RTP packet, and the RTP packet is a packet after interleaving processing performed by the transmitter, each packet of the RTP packet received by the receiver at least includes an interleaving identifier field, where the interleaving identifier field carries an interleaving identifier used to indicate that a current packet has been interleaved, and the receiver can determine that the received RTP packet needs de-interleaving processing according to the interleaving identifier field.

Specifically, the interleaving identification field includes:

alternatively, the first and second electrodes may be,

an InterFlag field contained in payload of the RTP message;

alternatively, the first and second electrodes may be,

a first field included in the payload type of the RTP packet, where the first field is used to indicate that the current packet is interleaved, and a name of the first field is not specifically limited in this embodiment of the present invention.

Correspondingly, the receiver also receives two fields of an InterType field and an InterParameter field through a signaling channel, and the two fields respectively indicate the interleaving type (for example, regular interleaving, irregular interleaving, random interleaving and the like) and specific interleaving parameters of the RTP message.

The receiver can determine the specific de-interleaving technique of the RTP message according to the two fields, so that the receiver uses the de-interleaving technique to perform de-interleaving processing on the RTP message.

And S203, if the type of the message is the second type, the receiver performs FEC decoding on the message.

The priority of the second type of message is a second priority, and the second priority is superior to the first priority.

Specifically, if the type of the message is the second type, the receiver performs FEC decoding on the message.

It should be noted that, the receiver in the embodiment of the present invention may use any existing FEC decoding technology to process the second type of packet, which is not specifically limited in this embodiment of the present invention.

Further, the receiver performs error correction processing on the FEC decoded second type message.

It should be noted that, in the embodiment of the present invention, the execution sequence of S202 and S203 may be that S202 is executed first and then S203 is executed, or S203 is executed first and then S202 is executed, or S202 and S203 are executed simultaneously, which is not limited in this embodiment of the present invention.

Further, if the message in the data stream received by the receiver includes a third type of message, the receiver does not process the third type of message, where the priority of the third type of message is a third priority, and the third priority is smaller than the second priority and smaller than the first priority.

S204, the receiver restores the processed various types of messages into initial messages.

After processing various types of messages, the receiver performs reduction processing on each processed message, so that the receiver reduces the received message into an initial message.

Specifically, a sequence restorer in the receiver restores the received message to the initial message.

The sequence reductor can be set up separately in the receiver or can be implemented integrally on a certain processor in the receiver.

The receiver in the embodiment of the invention adopts any one of the existing methods for restoring the initial message to restore the processed various types of messages into the initial message.

The embodiment of the invention provides a message transmission method, wherein a receiver classifies messages in received data streams after receiving the data streams to obtain at least two types of messages, then processes each type of message by the receiver in a respective processing mode, and finally restores the processed various types of messages into initial messages.

According to the scheme, the data stream received by the receiver comprises at least two types of messages, the data stream received by the receiver is processed by the transmitter, the transmitter does not interleave all the data streams, classifies the messages in the data streams according to a preset rule, and then performs different processing on various types of messages, wherein the transmitter only interleaves the first type of message with the highest priority in the data streams, so that the most important message in the data streams can not be lost, the transmission quality of the message can be guaranteed, and the time delay caused by interleaving can be effectively reduced.

EXAMPLE III

In order to simply understand the present invention, the embodiment of the present invention takes video transmission as an example to describe a transmission method of a packet.

Because the human eyes have different sensitivities to the pixel points/regions with different space, time, color and brightness in the video, the importance degree of the message bearing different pixel points/regions is different. In addition, when the video is transmitted in the network, if one or more messages are lost in the I frame or the IDR frame, the decoding of the whole GOP is influenced; if a P frame is lost, decoding of a B frame referring to the P frame is affected; if a B frame is lost, decoding of the B frame that references the B frame is affected, and if the B frame is not referenced, decoding of the B frame is affected only.

Therefore, in the embodiment of the present invention, the packet transmission method is described by taking the packet of the I frame and the IDR frame as the packet of the first type (high importance packet), the P frame and the referred B frame as the packet of the second type (medium importance packet), and the packet of the other contents as the packet of the third type (low importance packet).

As shown in fig. 3, the message transmission method provided in the embodiment of the present invention includes the following steps:

s301, after receiving the video data stream, the transmitter classifies the messages in the video data stream according to a preset rule to obtain three messages of a first type, a second type and a third type.

The preset rule may classify the packets according to a packet header of each packet in the video data stream, where the packet header of each packet carries type information indicating a type of the packet, or classify the packets according to a field indicating a priority of the packet in each packet in the video data stream, which is not limited in the embodiment of the present invention.

For example, the preset rule may be to classify the RTP packet according to an NAL Type/Payload Type specified in standard RFC6184, where the NAL Type/Payload Type carries specific information representing a video frame.

Specifically, after receiving the video data stream, the transmitter may analyze the payload of each packet, and use the packets of the I frame and the IDR frame as the first type of packet, the P frame and the referred B frame as the second type of packet, and the packets of the other contents as the third type of packet. The priority of the first type of message is higher than the priority of the other types of messages, the priority of the second type of message is higher than the priority of the first type of message, and the priority of the third type of message is lower than the priority of the first type of message and lower than the priority of the second type of message.

S302, the sender processes the first type of message in an interleaving mode, and processes other types of messages except the first type of message in a non-interleaving mode.

The interleaving mode is adopted to process the message, which can generally solve the interference of impulse noise to a physical line, recover the message influenced by the received impulse and further ensure the transmission quality of the message.

After classifying the messages in the video data stream, the sender processes the messages of the I frame and the IDR frame in an interleaving mode, so that the transmission quality of the messages of the I frame and the IDR frame can be ensured, and the influence on other types of messages caused by the loss of the messages of the I frame and the IDR frame is further reduced.

In addition, the transmitter may perform FEC coding on the first type of packet while processing the first type of packet in an interleaving manner, so as to protect the transmission quality of the first type of packet.

Further, if the number of the messages in the processor of the transmitter is smaller than a preset threshold within a preset time period, and the difference between the preset threshold and the number of the messages in the processor of the transmitter is N, selecting N messages from the buffer so that the processor of the transmitter can immediately interleave, wherein the second type of message is stored in the buffer of the transmitter, and the priority of the message is superior to that of the first type of message.

The processor of the transmitter may be set up separately in the transmitter, or may be implemented integrally on a certain module in the transmitter. The processor may be a CPU, an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.

Preferably, the processor in the embodiment of the present invention may also be called an interleaver.

Specifically, the transmitter FEC encodes the second type of packet and does not process the third type of packet.

The priority of the second type of message is a second priority, the second priority is superior to the first priority, the priority of the third type of message is a third priority, and the third priority is smaller than the second priority and smaller than the first priority.

It should be noted that, the transmitter in the embodiment of the present invention may use any one of existing FEC coding technologies to process the second type of packet, which is not limited in the embodiment of the present invention.

The FEC encoding, performed by the transmitter, on the second type of packet specifically includes: the sender caches the second type of message first, and then judges whether the number of the messages in a processor of the sender is smaller than a preset threshold value.

It should be noted that the manner in which the sender processes the second type and the third type of messages in the embodiment of the present invention is not limited to the foregoing processing manner.

And S303, the transmitter transmits the processed various types of messages to the receiver.

And the transmitter transmits the message of the first type after the interleaving processing, the message of the second type after the FEC coding and the message of the third type without processing to the receiver.

Specifically, the interleaving identification field includes:

alternatively, the first and second electrodes may be,

an Interflag field contained in payload of the interleaved RTP message;

alternatively, the first and second electrodes may be,

Illustratively, the transmitter transmits the mtype and Inter Parameter fields using RTCP, or the transmitter transmits the mtype and Inter Parameter fields using SIP.

S304, the receiver classifies the messages in the received data stream to obtain three types of messages.

The video data stream received by the receiver is sent after the transmitter processes the three types of messages in the video data stream in different modes, so that the receiver can obtain the three types of messages by classifying the messages in the video data stream after receiving the video data stream, and further processes the three types of messages in different processing modes.

Specifically, the receiver classifies the packets in the data stream to obtain the first type, the second type, and the third type of packets.

It is easily understood that, for the receiver, the first type of packet in the received data stream is a packet processed by interleaving by the transmitter, and the second type of packet is a packet coded by FEC by the transmitter.

S305, the receiver carries out de-interleaving processing on the received first type message.

After receiving the video data stream, the receiver classifies the messages in the video data stream to obtain three types of messages. After classifying the messages in the data stream, the receiver processes each type of message in a respective processing mode.

Specifically, the receiver performs deinterleaving processing on a received first type of packet, where the priority of the first type of packet is a first priority, and the first priority is higher than the priorities of other types of packets.

If the first type of message received by the receiver is an RTP message, and the RTP message is a message processed by the transmitter by using an interleaving technique, each message of the RTP message received by the receiver at least includes an interleaving identifier field, where the interleaving identifier field carries an interleaving identifier used for indicating that the current message has been interleaved, and the receiver can determine that the received RTP message needs de-interleaving according to the interleaving identifier field.

Specifically, the interleaving identification field includes:

alternatively, the first and second electrodes may be,

an InterFlag field contained in payload of the RTP message;

alternatively, the first and second electrodes may be,

The receiver can determine the specific deinterleaving technique of the data stream according to the two fields, so that the receiver performs deinterleaving processing on the data stream by using the deinterleaving technique.

S306, the receiver performs FEC decoding on the received second type message.

The receiver in the embodiment of the present invention may use any one of existing FEC decoding technologies to process the received second type of packet, which is not specifically limited in the embodiment of the present invention.

S307, the receiver does not process the received third type message.

The priority of the third type of message is a third priority, and the third priority is smaller than the second priority and smaller than the first priority.

It should be noted that, in the embodiment of the present invention, the execution sequence of S305, S306, and S307 may be that S305 is executed first, then S306 is executed, and then S307 is executed, or that S306 is executed first, then S305 is executed, and then S307 is executed, or that S305, S306, and S307 are executed simultaneously, which is not limited in this embodiment of the present invention.

S308, the receiver restores the processed various types of messages into initial messages.

The embodiment of the invention provides a message transmission method, wherein a sender classifies messages in a received data stream according to a preset rule after receiving the data stream to obtain at least two types of messages, then processes the first type of messages in an interleaving mode and processes other types of messages except the first type of messages in a non-interleaving mode, wherein the priority of the first type of messages is higher than that of the other types of messages, and finally, the sender sends the processed various types of messages to a receiver so that the receiver processes the processed various types of messages in respective corresponding processing modes.

Through the scheme, after the transmitter receives the data stream, the transmitter does not need to carry out FEC coding and interleaving processing on all the received data streams, but classifies the messages in the data stream according to a preset rule and then carries out different processing on various types of messages, wherein the transmitter only carries out interleaving processing on the first type of message with the highest priority in the data stream, so that the most important message in the data stream can be ensured not to be lost, the transmission quality of the message can be ensured, and the time delay caused by interleaving can be effectively reduced.

Example four

An embodiment of the present invention provides a transmitter 1, and as shown in fig. 4, the transmitter 1 includes:

a receiving unit 10 is configured to receive a data stream.

The classifying unit 11 is configured to classify the packets in the data stream received by the receiving unit 10 according to a preset rule, so as to obtain at least two types of packets.

The preset rule may be to classify the packets according to the packet header of each packet in the data stream received by the receiving unit 10, where the packet header of each packet carries type information indicating a packet type, or may be to classify the packets according to a field indicating a priority of each packet in the data stream received by the receiving unit 10, which is not specifically limited in the embodiment of the present invention.

Illustratively, the preset rule is to classify the packets according to the TOS field of the IP packet, wherein the TOS field includes a priority subfield; the preset rule may also be to classify the RTP packet according to an NAL Type/Payload Type specified in standard RFC6184, where the NAL Type/Payload Type carries specific information indicating a video frame.

The processing unit 12 is configured to process a first type of packet in an interleaving manner, and process other types of packets except the first type of packet in a non-interleaving manner, where a priority of the first type of packet is a first priority, and the first priority is higher than priorities of the other types of packets.

After the classification unit 11 classifies the packets in the data stream, the processing unit 12 processes the packet of the highest priority in an interleaving manner, that is, the processing unit 12 processes the packet of the first type in an interleaving manner, so that the transmission quality of the packet of the first type can be ensured, and the influence on the packets of other types due to the loss of the packet of the first type is further reduced.

The processing unit 12 in the embodiment of the present invention may use any one of existing interleaving techniques to process the first type of packet, which is not limited in the embodiment of the present invention.

A sending unit 13, configured to send the various types of messages processed by the processing unit 12 to a receiver, so that the receiver processes the various types of messages processed by the receiver in respective corresponding processing manners.

Further, the processing unit 12 is specifically configured to perform forward error correction FEC coding on the second type of packet if the priority of the second type of packet is a second priority, where the second priority is better than the first priority, and is specifically configured to not process the third type of packet if the priority of the third type of packet is a third priority, where the third priority is smaller than the second priority and smaller than the first priority.

The processing unit 12 in the embodiment of the present invention may use any one of existing FEC coding techniques to process the second type of packet, which is not limited in the embodiment of the present invention.

It should be noted that the manner in which the processing unit 12 processes other types of messages in the embodiment of the present invention is not limited to the above processing manners.

Further, as shown in fig. 5, the transmitter 1 further includes a storage unit 14;

the storage unit 14 is configured to cache the second type of packet if the priority of the second type of packet is the second priority.

The transmitter 1 further comprises a judging unit 15;

the judging unit 15 is configured to judge whether the number of the first type of packets is smaller than a preset threshold.

The processing unit 12 is configured to perform forward error correction FEC coding on the second type of packets in the storage unit 14 if the number of the first type of packets is equal to a preset threshold, and to perform interleaving processing on N second type of packets in the storage unit if the number of the first type of packets is less than the preset threshold and a difference between the preset threshold and the number of the first type of packets is NN greater than or equal to 1, and perform FEC coding on the second type of packets except the N second type of packets in the storage unit 14.

Further, while the processing unit 12 processes the first type of packet in an interleaving manner, the FEC modulation may also be performed on the first type of packet, so as to protect the transmission quality of the first type of packet.

Further, the processing unit 12 is specifically configured to select N second type messages from the storage unit 14 to perform interleaving if, in a preset time period, the number of the first type messages in the processing unit 12 is smaller than the preset threshold, and a difference between the preset threshold and the number of the first type messages in the processing unit 12 is N.

Further, if the first type of message is a real-time transport protocol (RTP) message, the interleaved RTP message at least comprises an interleaving identification field;

wherein, the interleaving identification field comprises:

alternatively, the first and second electrodes may be,

an Interflag field contained in payload of the interleaved RTP message;

alternatively, the first and second electrodes may be,

Further, the sending unit 13 is specifically configured to send the interleaved RTP packet to a receiver.

Further, the sending unit 13 is further specifically configured to send an Inter type and an Inter Parameter to a receiver, where the Inter type is used to indicate an interleaving type used in interleaving the RTP packet, and the Inter Parameter is used to indicate a specific interleaving Parameter.

While the sending unit 13 sends the interleaved RTP packet to the receiver, the sending unit 13 also sends the mtype and the Inter Parameter to the receiver through a signaling channel, so that the receiver determines a specific de-interleaving technique according to the two fields, and restores the RTP packet by using the determined de-interleaving technique.

It should be noted that the sending unit 13 may use any existing protocol to send the mtype and Inter Parameter fields, which is not specifically limited in this embodiment of the present invention.

Illustratively, the sending unit 13 transmits an mtype and an Inter Parameter field using RTCP, or the sender transmits an mtype and an Inter Parameter field using SIP.

The embodiment of the invention provides a transmitter which comprises a receiving unit, a classifying unit, a processing unit and a transmitting unit. After receiving a data stream, a sender classifies messages in the received data stream according to a preset rule to obtain at least two types of messages, then the sender processes the first type of messages in an interleaving mode and processes the messages of other types except the first type of messages in a non-interleaving mode, wherein the priority of the first type of messages is higher than the priority of the messages of other types, and finally the sender sends the processed messages of various types to a receiver so that the receiver processes the processed messages of various types in respective corresponding processing modes.

EXAMPLE five

An embodiment of the present invention provides a receiver 1, as shown in fig. 6, where the receiver 1 includes:

the receiving unit 20 is configured to receive a data stream, where the data stream includes at least two types of packets.

The data stream received by the receiving unit 20 is a data stream sent by a sender, where the messages in the data stream are messages processed by the sender, and the data stream includes at least two types of messages.

A classifying unit 21, configured to classify the packets in the data stream received by the receiving unit 20, so as to obtain at least two types of packets.

After the receiving unit 20 receives the data stream, the classifying unit 21 determines the type of the packet according to the format of the packet or a header of the packet, where the header of the packet carries information indicating which processing method the sender uses to process the packet.

A processing unit 22, configured to perform deinterleaving processing on a packet if the type of the packet is a first type, where the priority of the packet of the first type is a first priority, and the first priority is higher than the priorities of the packets of the other types, and perform forward error correction FEC decoding on the packet if the type of the packet is a second type, where the priority of the packet of the second type is a second priority, and the second priority is higher than the first priority, and to restore the processed packets of the various types to an initial packet.

The processing unit 22 may use any one of the existing deinterleaving techniques to perform deinterleaving processing on the first type of packet, and may use any one of the existing FEC decoding techniques to perform processing on the second type of packet, which is not limited in this embodiment of the present invention.

Further, the processing unit 22 is further configured to not process the packet of the third type if the type of the packet is a third type, where a priority of the packet of the third type is a third priority, and the third priority is smaller than the second priority and smaller than the first priority.

Further, the processing unit 22 is further configured to perform error correction processing on the deinterleaved first type packet, and is further configured to perform error correction processing on the FEC-decoded second type packet.

Further, if the first type of packet is a real-time transport protocol RTP packet, the RTP packet at least includes an interleaving identification field;

wherein the interleaving identification field comprises:

alternatively, the first and second electrodes may be,

an InterFlag field contained in payload of the RTP message;

alternatively, the first and second electrodes may be,

Further, the receiving unit 20 is further configured to receive an mtype and an Inter Parameter field if the first type of packet is an RTP packet, where the mtype is used to indicate an interleaving type of the RTP packet, and the Inter Parameter is used to indicate a specific interleaving Parameter.

The receiving unit 20 further receives two fields of mtype and Inter Parameter through a signaling channel, where the two fields respectively indicate an interleaving type (e.g., regular interleaving, irregular interleaving, random interleaving, etc.), and specific interleaving parameters.

Further, the processing unit 22 is specifically configured to determine a deinterleaving technique according to the mtype and the Inter Parameter field received by the receiving unit 20.

Further, the processing unit 22 is specifically configured to perform deinterleaving processing on the RTP packet by using the deinterleaving technique.

The embodiment of the invention provides a receiver which comprises a receiving unit, a classifying unit and a processing unit. After receiving the data stream, the receiver classifies the messages in the received data stream to obtain at least two types of messages, then the receiver processes each type of message in a respective processing mode, and finally, the receiver restores the processed various types of messages into initial messages.

EXAMPLE six

An embodiment of the present invention provides a transmitter, as shown in fig. 7, including a communication interface 30, a processor 31, a memory 32, and a system bus 33, wherein,

the communication interface 30, the processor 31 and the memory 32 are connected by a system bus 33 to complete communication with each other.

The processor 31 may be a single or multi-core central processing unit, or a specific integrated circuit, or one or more integrated circuits configured to implement embodiments of the present invention.

The Memory 32 may be a high-speed Random Access Memory (RAM) Memory, or may be a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.

Specifically, the communication interface 30 is configured to receive a data stream.

Specifically, the processor 31 is configured to classify the packets in the data stream received by the communication interface 30 according to a preset rule, so as to obtain at least two types of packets.

Further, the processor 31 is configured to process the first type of packet in an interleaving manner, and process other types of packets except the first type of packet in a non-interleaving manner, where a priority of the first type of packet is a first priority, and the first priority is higher than priorities of the other types of packets.

The preset rule may classify the packet according to a packet header of each packet in the data stream received by the communication interface 30, where the packet header of each packet carries type information indicating a packet type, or classify the packet according to a field indicating a packet priority in each packet in the data stream received by the communication interface 30, which is not specifically limited in the embodiment of the present invention.

For example, the predetermined rule may be to classify the IP packet according to a TOS field of the IP packet, wherein the TOS field includes a priority subfield.

The preset rule may also be to classify the RTP packet according to an NAL Type/Payload Type specified in standard RFC6184, where the NAL Type/Payload Type carries specific information indicating a video frame.

After classifying the packets in the data stream, the processor 31 processes the packet of the highest priority in an interleaving manner, that is, the processor 31 processes the packet of the first type in an interleaving manner, so that the transmission quality of the packet of the first type can be ensured, and the influence on the packets of other types due to the loss of the packet of the first type is reduced.

The processor 31 in the embodiment of the present invention may use any one of existing interleaving techniques to process the first type of packet, which is not limited in the embodiment of the present invention.

Specifically, the communication interface 30 is further configured to send various types of messages processed by the processor 31 to a receiver, so that the receiver processes the various types of messages processed by the receiver in respective corresponding processing manners.

Further, the processor 31 is specifically configured to perform forward error correction FEC coding on the second type of packet if the priority of the second type of packet is a second priority, where the second priority is better than the first priority, and is specifically configured to not process the third type of packet if the priority of the third type of packet is a third priority, where the third priority is smaller than the second priority and smaller than the first priority.

The processor 31 in the embodiment of the present invention may use any one of existing FEC coding technologies to process the second type of packet, which is not limited in the embodiment of the present invention.

It should be noted that the manner in which the processor 31 processes other types of messages in the embodiment of the present invention is not limited to the above processing manners.

Further, the memory 32 is configured to cache the second type of packet if the priority of the second type of packet is the second priority.

Further, the processor 31 is configured to determine whether the number of the first type of packets is smaller than a preset threshold.

Further, the processor 31 is configured to perform forward error correction FEC coding on the second type of packets in the memory 32 if the number of the first type of packets is equal to a preset threshold, and to process N second type of packets in the memory 32 in an interleaving manner if the number of the first type of packets is less than the preset threshold, and a difference between the preset threshold and the number of the first type of packets is N, where N is greater than or equal to 1, and further configured to perform FEC coding on the second type of packets except for the N second type of packets in the memory 32.

Further, the processor 31 may also perform FEC modulation on the first type of packet while processing the first type of packet in an interleaving manner, so as to protect the transmission quality of the first type of packet.

Further, the processor 31 is specifically configured to select N second type packets from the memory 32 to perform interleaving immediately if, in a preset time period, the number of the first type packets is smaller than the preset threshold, and a difference between the preset threshold and the number of the first type packets is N.

wherein the interleaving identification field comprises:

alternatively, the first and second electrodes may be,

an Interflag field contained in payload of the interleaved RTP message;

alternatively, the first and second electrodes may be,

Further, the communication interface 30 is specifically configured to send the interleaved RTP packet to a receiver.

Further, the communication interface 30 is further specifically configured to send an mtype and an Inter Parameter to a receiver through a signaling channel, where the mtype is used to indicate an interleaving type used when interleaving the RTP packet, and the Inter Parameter is used to indicate a specific interleaving Parameter.

While the communication interface 30 sends the interleaved RTP packet to the receiver, the communication interface 30 also sends the mtype and the Inter Parameter to the receiver through the signaling channel, so that the receiver determines a specific de-interleaving technique according to the two fields, and performs de-interleaving processing on the RTP packet by using the determined de-interleaving technique.

It should be noted that the communication interface 30 may use any existing protocol to send the mtype and Inter Parameter fields, which is not specifically limited in this embodiment of the present invention.

The embodiment of the invention provides a transmitter, which classifies messages in a received data stream according to a preset rule after receiving the data stream to obtain at least two types of messages, then processes the first type of messages in an interleaving mode, and processes other types of messages except the first type of messages in a non-interleaving mode, wherein the priority of the first type of messages is higher than that of the other types of messages, and finally, the transmitter transmits the processed various types of messages to a receiver so that the receiver processes the processed various types of messages in respective corresponding processing modes.

Through the scheme, after the transmitter receives the data stream, the transmitter does not carry out FEC coding and interleaving processing on all the received data streams, but classifies the messages in the data stream according to a preset rule and then carries out different processing on various types of messages, wherein the transmitter only carries out interleaving processing on the first type of message with the highest priority in the data stream, so that the most important message in the data stream can be ensured not to be lost, the transmission quality of the message can be ensured, and the time delay caused by interleaving can be effectively reduced.

EXAMPLE seven

Embodiments of the present invention provide a receiver, as shown in fig. 8, that includes a communication interface 40, a processor 41, a memory 42, and a system bus 43, wherein,

the communication interface 40, the processor 41 and the memory 42 are connected via a system bus 43 to complete communication therebetween.

Processor 41 may be a single or multi-core central processing unit, or a specific integrated circuit, or one or more integrated circuits configured to implement embodiments of the present invention.

The memory 42 may be a high speed RAM or may be a non-volatile memory such as at least one disk memory.

Specifically, the communication interface 40 is configured to receive a data stream, where the data stream includes at least two types of messages.

The data stream received by the communication interface 40 is a data stream sent by a sender, and the messages in the data stream are messages processed by the sender, and the data stream at least includes two types of messages.

Specifically, the processor 41 is configured to classify packets in the data stream received by the communication interface 40 to obtain at least two types of packets.

Further, the processor 41 is configured to perform deinterleaving processing on the packet if the type of the packet is a first type, where the priority of the packet of the first type is a first priority, and the first priority is higher than the priorities of the packets of the other types, and perform forward error correction FEC decoding on the packet if the type of the packet is a second type, where the priority of the packet of the second type is a second priority, and the second priority is higher than the first priority, and is configured to restore the processed packets of the various types to an initial packet.

After receiving the data stream at the communication interface 40, the processor 41 determines the type of the packet according to the format of the packet or a header, where the header carries information indicating which processing method the sender uses to process the packet.

Further, the processor 41 is further configured to not process the packet of the third type if the type of the packet is a third type, where a priority of the packet of the third type is a third priority, and the third priority is smaller than the second priority and smaller than the first priority.

The processor 41 may use any one of the existing deinterleaving techniques to process the first type of packet, and may use any one of the existing FEC decoding techniques to process the second type of packet, which is not limited in this embodiment of the present invention.

Further, the processor 41 is further configured to perform error correction processing on the deinterleaved first type packet, and further configured to perform error correction processing on the FEC-decoded second type packet.

wherein the interleaving identification field comprises:

alternatively, the first and second electrodes may be,

an InterFlag field contained in payload of the RTP message;

alternatively, the first and second electrodes may be,

Further, the communication interface 40 is further configured to receive an mtype and an Inter Parameter field if the first type of packet is an RTP packet, where the mtype is used to indicate an interleaving type of the RTP packet, and the Inter Parameter is used to indicate a specific interleaving Parameter.

Further, the processor 41 is specifically configured to determine a deinterleaving technique according to the mtype and the Inter Parameter field received by the communication interface 40.

Further, the processor 41 is specifically configured to perform deinterleaving processing on the RTP packet by using a determined deinterleaving technique.

The embodiment of the invention provides a receiver, which classifies messages in received data streams after receiving the data streams to obtain at least two types of messages, then processes each type of message by the receiver in a respective processing mode, and finally restores the processed various types of messages into initial messages.

It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for packet transmission, comprising:

receiving a data stream, wherein messages in the data stream comprise at least two types of messages;

and sending the processed various types of messages to a receiver.

2. The message transmission method according to claim 1, wherein the processing of the messages of the other types than the first type in a non-interleaved manner specifically includes:

3. The message transmission method according to claim 2, wherein if the priority of the second type of message is the second priority, performing forward error correction FEC coding on the second type of message, specifically comprising:

if the number of the first type messages is smaller than a preset threshold value, the difference between the preset threshold value and the number of the first type messages is N, and N is larger than or equal to 1, processing N second type messages in the cache in an interleaving mode, and performing FEC encoding on the second type messages except the N second type messages in the cache.

4. The message transmission method according to claim 1, wherein the processing the first type of message in an interleaving manner specifically includes:

and if the number of the first type messages is smaller than a preset threshold value within a preset time period, and the difference between the preset threshold value and the number of the first type messages is N, selecting N second type messages from the buffer so as to carry out interleaving at once.

5. The message transmission method according to any of claims 1-4,

if the first type message is a real-time transport protocol (RTP) message, the interleaved RTP message at least comprises an interleaving identification field;

wherein the interleaving identification field comprises:

alternatively, the first and second electrodes may be,

an Interflag field contained in payload of the interleaved RTP message;

alternatively, the first and second electrodes may be,

6. The message transmission method according to claim 5, wherein the sending of the processed messages of various types to the receiver comprises:

and sending the interleaved RTP message to a receiver.

7. The message transmission method according to claim 6, wherein the sending the processed messages of various types to a receiver further comprises:

8. A method for packet transmission, comprising:

and restoring the processed various types of messages into initial messages.

9. The message transmission method according to claim 8, wherein the method further comprises:

10. The message transmission method according to claim 8, wherein the method further comprises:

11. The message transmission method according to any of claims 8-10,

if the first type message is a real-time transport protocol (RTP) message, the RTP message at least comprises an interleaving identification field;

wherein the interleaving identification field comprises:

alternatively, the first and second electrodes may be,

an InterFlag field contained in payload of the RTP message;

alternatively, the first and second electrodes may be,

12. The message transmission method according to claim 11, wherein if the first type of message is an RTP message, the method further comprises:

13. The message transmission method according to claim 12, wherein the deinterleaving the message specifically includes:

14. A transmitter, comprising:

a receiving unit, configured to receive a data stream, where a packet in the data stream includes at least two types of packets;

15. The transmitter of claim 14,

the processing unit is specifically configured to perform forward error correction FEC coding on a second type of packet if the priority of the second type of packet is a second priority, where the second priority is superior to the first priority, and is specifically configured to not process a third type of packet if the priority of the third type of packet is a third priority, where the third priority is smaller than the second priority and smaller than the first priority.

16. The transmitter of claim 15, wherein the transmitter further comprises a storage unit;

the transmitter further includes a judgment unit;

17. The transmitter of claim 14,

the processing unit is specifically configured to select N second type messages from the storage unit to perform interleaving immediately if, within a preset time period, the number of the first type messages is smaller than a preset threshold, and a difference between the preset threshold and the number of the first type messages is N.

18. The transmitter according to any one of claims 14 to 17,

wherein the interleaving identification field comprises:

at least including an InterFlag field in a message header of the RTP message after interleaving, wherein the InterFlag is used for indicating that the current message is interleaved;

alternatively, the first and second electrodes may be,

an Interflag field contained in payload of the interleaved RTP message;

alternatively, the first and second electrodes may be,

19. The transmitter of claim 18,

the sending unit is specifically configured to send the interleaved RTP packet to a receiver.

20. The transmitter of claim 19,

the sending unit is further specifically configured to send an mtype and an mtarameter to the receiver, where the mtype is used to indicate an interleaving type used when interleaving the RTP packet, and the mtarameter is used to indicate a specific interleaving Parameter.

21. A receiver, comprising:

22. The receiver of claim 21,

the processing unit is further configured to not process the packet of the third type if the type of the packet is a third type, where a priority of the packet of the third type is a third priority, and the third priority is smaller than the second priority and smaller than the first priority.

23. The receiver of claim 21,

the processing unit is further configured to perform error correction processing on the deinterleaved first type packet, and further configured to perform error correction processing on the FEC-decoded second type packet.

24. The receiver according to any of claims 21-23,

wherein the interleaving identification field comprises:

alternatively, the first and second electrodes may be,

an InterFlag field contained in payload of the RTP message;

alternatively, the first and second electrodes may be,

25. The receiver of claim 24,

the receiving unit is further configured to receive an mtype and an Inter Parameter field if the first type of packet is an RTP packet, where the mtype is used to indicate an interleaving type of the RTP packet, and the Inter Parameter is used to indicate a specific interleaving Parameter.

26. The receiver of claim 25,

the processing unit is specifically configured to determine a deinterleaving technique according to the mtype and the Inter Parameter field received by the receiving unit, and specifically configured to perform deinterleaving on the RTP packet by using the deinterleaving technique.