WO2010081430A1 - Procédé, terminal et système de transmission pour flux multimédia - Google Patents

Procédé, terminal et système de transmission pour flux multimédia Download PDF

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Publication number
WO2010081430A1
WO2010081430A1 PCT/CN2010/070227 CN2010070227W WO2010081430A1 WO 2010081430 A1 WO2010081430 A1 WO 2010081430A1 CN 2010070227 W CN2010070227 W CN 2010070227W WO 2010081430 A1 WO2010081430 A1 WO 2010081430A1
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WO
WIPO (PCT)
Prior art keywords
code stream
channel
channels
primary channel
redundant
Prior art date
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PCT/CN2010/070227
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English (en)
Chinese (zh)
Inventor
黎迎斌
Original Assignee
华为终端有限公司
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Publication of WO2010081430A1 publication Critical patent/WO2010081430A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/80—Responding to QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/24—Multipath
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/401—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a method, a terminal, and a system for transmitting a media code stream. Background technique
  • FIG. 1 is a schematic diagram of a prior art transmission code stream of the present invention, in which redundant backup data is inserted into a code stream of a call, if it happens The "backed up portion" is damaged or missing, and the redundant backup data can reach the receiving terminal normally, and the receiving terminal can restore the part of the stream to be backed up according to the internal flag.
  • the final receiving terminal can completely recover packets 1 through 9 to completely overcome network damage.
  • ISDN Integrated Services Digital Network
  • El European 30-way monthly permanent code modulation PCM
  • the object of the embodiments of the present invention is to provide a method, a terminal, and a system for transmitting a media code stream, which are used to solve the problem in the prior art that the transmission process only relies on one route, so that the effect of resisting network damage is not good; or the anti-injury technology Applicable transmission lines have various limitations, or defects that cannot be afforded by ordinary users due to the high cost.
  • a method for transmitting a media code stream is applied to a transmitting terminal to transmit a code stream to a receiving terminal, where the code stream is divided into an ordinary code stream and a redundant code stream, where the normal code stream includes complete data that needs to be transmitted. At least comprising: establishing at least two channels required for establishing a transmission with the receiving terminal, and determining a primary channel; and the at least two channels are respectively the primary channel and the at least one secondary channel; collecting the at least two channels And communication information routed through the at least two channels; And communication information, specifying that the primary channel transmits at least part or all of the normal code stream; and designating any one of the at least two channels to transmit the redundant code stream.
  • a method for receiving a media code stream is applied to a receiving terminal to receive a code stream from a transmitting terminal, where the code stream is divided into an ordinary code stream and a redundant code stream, and at least includes: at least: establishing at least one required for establishing a transmission with the sending terminal Two channels, and determining a primary channel; and the at least two channels are respectively the primary channel and the at least one secondary channel; collecting the at least two channels and communication information routed through the at least two channels Receiving, according to the communication information, the normal code stream and the redundant code stream on each of the channels; using the normal code stream as a reference, decoding and restoring the code stream, eliminating interference in the transmission process; .
  • a transmitting terminal of a media code stream comprising: a first channel establishing module, configured to establish, with a receiving terminal of a medium, at least two channels required for transmitting a code stream, determine a primary channel; and the at least two channels respectively Is a primary channel and at least one secondary channel; the code stream is divided into a normal code stream and a redundant code stream, the normal code stream includes complete data that needs to be transmitted; and the first communication information collection module is configured to After the channel is established, the at least two channels and the communication information that is routed through the at least two channels are collected; the code stream distribution specifying module is configured to specify, according to the communication information, that the primary channel transmits at least the common Part or all of the code stream; designating any one of the at least two channels to transmit the redundant code stream; a code stream sending module, configured to send, according to the designation of the code stream distribution designation module, on each channel Different parts of the code stream.
  • a receiving terminal of a media code stream comprising: a second channel establishing module, configured to establish at least two channels required for transmitting a code stream with a transmitting terminal of the medium, to determine a primary channel; and the at least two channels are respectively a primary channel and at least one secondary channel; a second communication information collecting module, configured to collect the at least two channels and perform a path through the at least two channels after establishing a channel a communication stream receiving module, configured to receive the normal code stream and the redundant code stream on each of the channels according to the communication information; and a code stream recovery module, configured to use the normal stream For reference, the code stream is decoded and restored to eliminate interference in the transmission process.
  • a transmission system of a media stream includes a transmitting terminal and a receiving terminal; the transmitting terminal includes: a first channel establishing module, configured to establish, with a receiving terminal of the medium, at least two channels required for transmitting a code stream, Determining a primary channel; and the at least two channels are respectively the primary channel and the at least one secondary channel; the code stream is divided into a normal code stream and a redundant code stream, where the normal code stream includes a need to transmit
  • the first communication information collecting module is configured to collect, after the channel is established, the at least two channels and the communication information that is routed through the at least two channels; the code stream distribution specifying module, configured to Communication information, specifying that the primary channel transmits at least part or all of the normal code stream; designating any one of the at least two channels to transmit the redundant code stream; and a code stream sending module, configured to: according to the code Specifying a flow distribution designation module, transmitting different parts of the code stream on each channel; the receiving terminal includes: a second channel establishment module And
  • the embodiments of the present invention have the following beneficial effects: low cost and flexible implementation manner; and an appropriate amount of transmission bandwidth can achieve better anti-network damage effect in a very bad transmission environment, and can also realize backup of transmission line switching. So that on the one hand, it can be achieved when a certain transmission line is disconnected. Affecting the call service, on the other hand, it can also achieve the impact of network damage on the call service when the quality of all line transmissions is poor.
  • FIG. 1 is a schematic diagram of a prior art transmission code stream according to the present invention.
  • FIG. 2 is a schematic diagram of a multi-transmission line as a channel transmission code stream according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a working principle of an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a primary channel code stream being transmitted by a fully redundant backup according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram 1 of a normalized code stream in a transmitting terminal according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram 2 of a normalized code stream in a transmitting terminal according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a primary channel code stream being transmitted by an incomplete redundancy backup according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of application of a code stream recovery rule according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a primary channel transmission redundant code stream and a secondary channel transmission normal code stream according to an embodiment of the present invention
  • FIG. 10 is a schematic structural diagram of a media code stream sending terminal according to an embodiment of the present invention
  • FIG. 11 is a schematic structural diagram of a receiving terminal of a media code stream according to an embodiment of the present invention. detailed description
  • a call is routed through multiple transmission lines, and different routes can be used for different types of transmission lines.
  • call refers to a video, audio, or a call corresponding to real-time interaction of data. Because of the existence of a call, a code stream needs to be transmitted.
  • the term "capability negotiation” refers to a process in which the two parties to the call establish the processing capability of the other party.
  • ITU International Telecommunication Union Telecommunication Standardization Sector
  • H.323 protocol ITU-TH.323 protocol, referred to as H.323
  • H.320 Session Initiation Protocol
  • routing refers to an IP network route, an E1 network (2.048M link, PCM coded) route, an ISDN network route, or a network route based on other transmission lines.
  • the reference to the "normal code stream”, which is also referred to as the "reference code stream” refers to the basic service code stream or other type of code stream that is transmitted by both parties of the call. For details, refer to H261. Definitions in international standard protocols such as H263, H264, G.711, G.722, AAC, T.120; that is, a complete normal code stream can be decoded into a complete service code stream at least independently and correctly.
  • "reference stream” is a generalized concept. Two streams can be referenced to each other, but one of them is always selected as a reference. Generally, the "normal stream" from the main channel is selected as the reference.
  • redundant code stream refers to the replication of all or part of the most basic service code stream transmitted by both parties to the call; and in the general communication industry, it can be simply Achieve replication for the code stream.
  • a concept definition of a "primary channel” is introduced. If a call of a calling terminal is normal, the most basic communication conditions required can be satisfied; then the primary channel conforms to the communication. The condition is the most critical channel determined by the current call.
  • the reason for setting up the "main channel” is that if multiple channels are generated due to "calling" multiple routes, when recovering video streams such as video and audio, a code stream is used as a reference reference when restoring data, that is, ordinary A code stream, part or all of which is transmitted on the selected primary channel.
  • Corresponding to the primary channel is the secondary channel.
  • the calling terminal in the present application may be a terminal, an MCU, or a gateway.
  • the technical solution in the present application may be implemented between the calling terminal and the MCU, the gateway, and the MCU.
  • the calling terminal may be specifically: a sending terminal or a receiving terminal.
  • the calling terminal has a function of transmitting a code stream, it is a transmitting terminal, and when the calling terminal has a function of receiving a code stream, it is a receiving terminal.
  • the transmission process in communication also has some control aspect signaling, for example, the flow control command is performed through the primary channel, and therefore can only be based on the primary channel.
  • the reference for determining whether the entire communication is normal is also the primary channel. Since all channels are theoretically unreliable, there must be at least one criterion for discrimination, so the primary channel is selected as the basis for this discrimination.
  • FIG. 2 is a schematic diagram of a multi-transmission line as a channel transmission code stream according to an embodiment of the present invention.
  • the two parties that set the calling terminal are the calling terminal 1 and the calling terminal 2, respectively, and identify a plurality of transmission lines as channels to complete.
  • Each route is: the primary channel corresponds to the first route, the secondary channel corresponds to the second route, the secondary channel 2 corresponds to the third route, and the secondary channel n corresponds to the (n+1)th route.
  • the calling terminal 1 is the transmitting terminal
  • the solid line in Fig. 2 indicates the transmission channel of the code stream for realizing the communication function
  • the broken line indicates the receiving channel of the code stream.
  • the code stream is divided according to functions, it includes the control code stream and data stream required to implement the communication function.
  • a method for sending a media code stream where the code stream is divided into a normal code stream and a redundant code stream, where the normal code stream includes complete data that needs to be transmitted; Establishing at least two channels required for transmission with the receiving terminal, and determining a primary channel; and the at least two channels are respectively the primary channel and the at least one secondary channel;
  • the communication information specifying that the primary channel transmits at least part or all of the normal code stream; and designating any one of the at least two channels to transmit the redundant code stream.
  • an appropriate amount of transmission bandwidth can achieve better anti-network damage effect in a very bad transmission environment, and at the same time, it can also achieve backup of the transmission line on and off, so that on the one hand, it can achieve no impact when a transmission line is disconnected.
  • the call service for example, if the primary channel is disconnected, the primary channel can be re-determined, and the normal code stream is re-adjusted to the new primary channel for transmission, ensuring that the entire call has a complete normal stream at any time; When the quality of all line transmissions is poor, the impact of network impairment on the call service can be greatly reduced.
  • the normal code stream is a service code stream that is used to establish a transmission between two parties of a call, and may also include other types of code streams, such as a code stream of a camera control class;
  • the embodiment of the present invention further provides a method for receiving a media code stream, which is applied to a receiving terminal to receive a code stream from a sending terminal, where the code stream is divided into an ordinary code stream and a redundant code stream, including at least :
  • the code stream is decoded and restored by using the normal code stream as a reference, and the interference of the transmission process is eliminated.
  • an appropriate amount of transmission bandwidth can achieve better anti-network damage effect in a very bad transmission environment, and at the same time, it can also achieve backup of the transmission line on and off, so that on the one hand, it can achieve no impact when a transmission line is disconnected.
  • Call services on the other hand, can also reduce the impact of network impairments on call services when all line transmission quality is poor.
  • FIG. 3 is a schematic flowchart of a working principle of an embodiment of the present invention, when a transmitting terminal and a receiving terminal are configured to cooperate with each other to implement a process of interacting with a transport stream. Specifically include:
  • Step 301 In the call initiation phase, a calling terminal initiates a call without loss of generality, and the calling terminal 1 initiates a call.
  • the calling terminal 1 simultaneously initiates multiple calls on different channels, and the channel may include channel 0 to channel n, where the specific value of n may be specified in advance, or may be added or deleted by the program according to a predetermined rule during the call.
  • the specific value of n For specific technical details on how to initiate a call, you can directly follow the standard H.323, H.320 or SIP protocols, or you can use a custom non-standard call protocol.
  • Step 302 Establish a call of channel 0, establish a call of channel 1, establish a call of channel 2, and establish a call of channel n;
  • Step 303 In the call setup phase, determine the primary channel from the plurality of channels established in step 302, without loss of generality, with channel 0 as the primary channel; and the other channels correspond to the secondary channel.
  • the establishment of the primary channel may be manually designated by the calling terminal before the call is initiated or initiated by the calling terminal.
  • negotiation if it is automatically negotiated by the calling terminal 1 as the calling terminal and the calling terminal 2, this negotiation is completed in the current step.
  • Step 304 Determine whether the multi-channel redundant backup call function is enabled; if yes, go to step 305, otherwise go to step 306.
  • the result of the capability negotiation performed at the time of the call establishment may be used as a basis for the judgment; the calling terminal can know whether the other party supports the multi-channel redundant backup call function, and if yes, perform the processing according to the subsequent step 305; Step 306.
  • Step 305 Collect communication information related to the transmission route of each channel for establishing communication, and prepare for reducing the workload of the network recovery processing, and then proceed to step 307.
  • the communication information to be collected mainly includes: the total number of all channels for completing call communication, the communication bandwidth of each channel, the route type of each channel, the independent number set for these channels, the designated primary channel, and the communication of each channel.
  • parameter. 4 is a schematic diagram of a primary channel code stream being transmitted by a fully redundant backup according to an embodiment of the present invention, wherein the code stream portion 401 is backed up from the channel 1, and the code stream portion 402 is on the slave channel 2 In the backup, the code stream portion 403 is backed up from the channel 3, and the code stream portion 404 and the code stream portion 405 are backed up from the channel n.
  • FIG. 4 is only an example of a full redundancy backup of the primary channel. The description of the embodiment of the present invention is not limited.
  • the routing type may include a transmission line type.
  • the communication parameters may include a video channel bandwidth and a code stream part identifier, an audio channel bandwidth, a code stream part identifier, other channel bandwidths, and a code stream part identifier. Table 1 Parameter information corresponding to each call
  • Step 306 Perform normal call processing.
  • the call is made by using the prior art method.
  • the standard H.323, H.320 or SIP protocol can be directly used, or a non-standard call protocol can be used. .
  • the call setup phase ends.
  • Step 307 At the stage in which the call is in progress, each channel transmits and receives a code stream, and normalizes the received or transmitted code stream.
  • FIG. 5 is a schematic diagram 1 of a normalized code stream in a transmitting terminal according to an embodiment of the present invention, and an ordinary code stream and a redundant code stream transmitted by all transmission lines are transmitted according to a packet/packet mode, and an ordinary code is used.
  • the stream is transmitted on the primary channel, and the redundant code stream is transmitted on the secondary channel.
  • the specific packet format can be referred to the international standard Real-time Transport Protocol (RTT), or similar Custom protocol implementation.
  • RTT Real-time Transport Protocol
  • FIG. 6 is a schematic diagram 2 of a normalized code stream in a transmitting terminal according to an embodiment of the present invention, and an ordinary code stream and a redundant code stream transmitted by all transmission lines are transmitted according to a circuit/frame mode, and the normal code stream is transmitted.
  • the redundant code stream is transmitted on the slave channel; the specific framing format can be referred to the international standard H.320 protocol, or can be implemented by a similar custom protocol.
  • Step 308 According to the communication information collected in step 305 and the transmission redundant code stream policy set in Table 1, respectively, different channels are specified to prepare for transmitting different code streams;
  • the primary channel transmits a normal code stream
  • the redundant code stream is transmitted from the channel.
  • FIG. 7 is a schematic diagram of the primary channel code stream being transmitted by the incomplete redundancy backup according to the embodiment of the present invention, and transmitting at least the normal code stream on the primary channel, and on the channel 1
  • a redundant code stream is transmitted, a redundant code stream is transmitted on channel 2, and a redundant code stream is transmitted on channel n.
  • the primary channel may be designated to transmit at least part or all of the normal code stream, and any one of the at least two channels may be designated to transmit the redundant code stream, so the embodiment of the present invention further The following technical solutions are provided:
  • the method further includes:
  • the primary channel also transmits a portion or all of the redundant code stream; that is, as long as the transmission condition of the primary channel allows, it is not necessary to limit which code stream is transmitted by the primary channel;
  • the slave channel also transmits the remainder of the normal code stream when the primary channel is designated to transmit at least a portion of the normal code stream.
  • the primary channel switching message is supported, and the calling terminal can switch the used primary channel in real time. That is, determining any time after a primary channel further includes: when the primary channel is abnormal, negotiating with the transmitting terminal to select a secondary channel as a new primary channel, and re-adjusting the normal code stream Transfer to the new primary channel to ensure that the entire call has a complete normal stream at all times.
  • the receiving terminal is configured to configure a receiving buffer, so that the receiving terminal can reconfigure the receiving buffer according to the network condition or the code stream transmission situation. For example, the receive buffer is adjusted based on the delay of the code stream transmission and the delay jitter.
  • Step 310 The receiving terminal receives all the code streams, performs comparison between the code streams, and performs decoding.
  • the receiving terminal receives different code streams from different channels of the other party, and restores them into one code stream according to the previous code stream distribution and the predetermined "stream recovery rule", and then outputs them to the processing module such as video and audio for decoding.
  • the transmitting the redundant code stream policy in step 308 directly affects the anti-network damage capability of the entire call:
  • the video and audio code streams are routed by five different transmission lines, so that it is possible to determine that there is one primary channel and four secondary channels; Some or all of the code streams transmitted by the primary channel have been redundantly backed up. Therefore, in the case of network impairment, the code stream that is redundantly backed up has good anti-network anomaly performance, wherein the consequences of the network anomaly are mainly reflected. Lost or lost data for transmission data.
  • the code stream portion 701, the code stream portion 702, the code stream portion 703, and the code stream portion 704 are all backed up in different slave channels.
  • the packet loss rate from channel 1 to channel 4 is &%, b%, c%, d%
  • the main channel packet loss rate is ⁇ %
  • the code stream part 1 The code stream portion 4 occupies %, B%, C%, and D% of the entire main channel code stream respectively, and then the code stream sent by the calling terminal 1 to the calling terminal 2 is recovered, and the packet loss rate H is:
  • H [(lA%-B%-C%-D%) + a% ⁇ ⁇ %) + (b% ⁇ ⁇ %) + (c% ⁇ C%) + (d% ⁇ D%)] z%;
  • the packet loss rate of the redundant portion of the code stream is substantially less than 1/10000.
  • the code stream recovery rule in step 309 is that the party receiving the code stream configures the overall receive buffer according to the line buffer of each master/slave channel, and receives and reorders the respective master/slave channels.
  • the code stream, the union part is completely extracted, and is used as an input of a decoder such as video and audio.
  • a decoder such as video and audio.
  • the buffer period of the primary channel buffer is 100ms
  • the buffer period of the buffer from the channel 1 is 120ms
  • the buffer period of the buffer from the channel 2 is 150ms
  • the period is configured to be 150ms.
  • the damage loss rate/error rate of the two routes does not exceed 3%, the two routes are directly used and the available bandwidth of the two lines is the same, and one of the main channels is used as the secondary channel, so the actual application effect can be achieved.
  • the packet loss rate or the bit error rate is 1/1000. If the damage loss rate/error rate of the three routes does not exceed 10%, the direct use of three routes and the available bandwidth of the three lines are the same, and one of the two channels is the master channel, and the actual application effect can be lost.
  • the packet rate or bit error rate is also 1/1000. As long as the access cost is increased a little, the network damage effect can be achieved in a very bad transmission environment.
  • FIG. 8 is a schematic diagram of application of a code stream recovery rule according to an embodiment of the present invention, and a buffer week During the period, 10 packets should be sent and received. If the primary channel loses packet 3 and packet 8, packet 1 is lost from channel 1, packet 10 is lost from channel 2, but the receiving buffer is received during a complete buffer period.
  • Each zone can receive 10 packets, that is, the receiving terminal collects and collects the data packets received by the primary channel and the slave channel, and can recover and decode the received 10 packets completely, and the effect of the output after decoding is only The effect of no network impairments on a route is exactly the same.
  • the entire code stream transmitted is not affected at the same time in most cases, especially for the code stream that needs to be transmitted in real time, and the anti-network damage technology provided by the embodiment of the present invention can be greatly improved.
  • the embodiments of the present invention are not limited to the technical solution of providing a primary channel for transmitting a normal code stream, but also providing a technical solution that the primary channel can also transmit a redundant code stream, and the normal code stream can also be transmitted from the channel.
  • FIG. 9 is a schematic diagram of a primary channel transmission redundant code stream and a secondary channel transmission common code stream according to an embodiment of the present invention.
  • the code stream portion 901 is only used as a backup transmission on the primary channel, and the code stream portion 905 is not redundant.
  • the backup is only transmitted on the slave channel; in other parts, the code stream portion 902, the code stream portion 903, and the code stream portion 904 are both transmitted by the master/slave channel, and are transmitted as redundant backups by the primary channel.
  • the storage medium is, for example, a ROM/RAM, a magnetic disk, an optical disk, or the like.
  • FIG. 10 is a schematic structural diagram of a sending terminal of a media code stream according to an embodiment of the present invention, including:
  • a first channel establishing module A01 configured to establish, by the receiving terminal of the medium, at least two channels required for transmitting a code stream, to determine a primary channel; and the at least two channels are respectively the primary channel and the at least one slave Channel; the code stream is divided into a normal code stream and a redundant code stream, and the normal code stream includes complete data that needs to be transmitted;
  • the first communication information collection module A02 is configured to collect, after the channel is established, the at least two channels and the communication information that is routed through the at least two channels;
  • a code stream distribution specifying module A03 configured to: according to the communication information, specify that the primary channel transmits at least part or all of the normal code stream; and designate any one of the at least two channels to transmit the redundant code stream ;
  • the code stream sending module A04 is configured to send different parts of the code stream on each channel according to the designation of the code stream distribution specifying module A03.
  • an appropriate amount of transmission bandwidth can achieve better anti-network damage effect in a very bad transmission environment, and at the same time, it can also achieve backup of the transmission line on and off, so that on the one hand, it can achieve no impact when a transmission line is disconnected.
  • Call services on the other hand, can also reduce the impact of network impairments on call services when all line transmission quality is poor.
  • the transmitting terminal further includes: a channel switching module A05, configured to, when the primary channel is abnormal, negotiate with the receiving terminal to select a slave channel as a primary channel.
  • a channel switching module A05 configured to, when the primary channel is abnormal, negotiate with the receiving terminal to select a slave channel as a primary channel.
  • the capability negotiation module A06 is configured to: after determining the primary channel, enter the receiving terminal If the receiving terminal does not support the application of the multi-channel redundant backup transmission function of the at least two channels, the multi-channel redundant backup transmission function is not enabled, and the transmission is performed according to the normal transmission procedure.
  • FIG. 11 is a schematic structural diagram of a receiving terminal of a media code stream according to an embodiment of the present invention, including:
  • a second channel establishing module B01 configured to establish, by the transmitting terminal of the medium, at least two channels required for transmitting the code stream, to determine a primary channel; and the at least two channels are respectively the primary channel and the at least one secondary channel ;
  • a second communication information collection module B02 configured to collect, after the channel is established, the at least two channels and the communication information that is routed through the at least two channels;
  • a code stream receiving module B03 configured to receive the normal code stream and the redundant code stream on each of the channels according to the communication information
  • the code stream recovery module B04 is configured to perform decoding and recovery on the code stream by using the normal code stream as a reference, and eliminate interference in the transmission process. And extracting a union portion of the code streams received and reordered in each of the primary channel and the slave channel, and inputting the decoder for decoding.
  • the code stream recovery module B04 reference may be made to the application of the code stream recovery rule in FIG. 8 , and details are not described herein again.
  • the code stream is decoded and restored with the common code stream as a reference reference, and the interference of the transmission process is eliminated.
  • An embodiment of the present invention provides a transmission system for a media code stream, including a sending terminal and a receiving terminal.
  • the sending terminal includes:
  • a first channel establishing module A01 configured to establish, with a receiving terminal of the medium, a code stream required for transmission Determining a primary channel by at least two channels; and the at least two channels are respectively a primary channel and at least one secondary channel; the code stream is divided into a normal code stream and a redundant code stream, and the normal code stream is Contains complete data that needs to be transmitted;
  • the first communication information collection module A02 is configured to collect, after the channel is established, the at least two channels and the communication information that is routed through the at least two channels;
  • a code stream distribution specifying module A03 configured to: according to the communication information, specify that the primary channel transmits at least part or all of the normal code stream; and designate any one of the at least two channels to transmit the redundant code stream ;
  • a code stream sending module A04 configured to send different parts of the code stream on each channel according to the designation of the code stream distribution specifying module A03;
  • the receiving terminal includes:
  • a second channel establishing module B01 configured to establish, by the transmitting terminal of the medium, at least two channels required for transmitting the code stream, to determine a primary channel; and the at least two channels are respectively the primary channel and the at least one secondary channel ;
  • a second communication information collection module B02 configured to collect, after the channel is established, the at least two channels and the communication information that is routed through the at least two channels;
  • a code stream receiving module B03 configured to receive the normal code stream and the redundant code stream on each of the channels according to the communication information
  • the code stream recovery module B04 is configured to perform decoding and decoding on the code stream by using the normal code stream as a reference, thereby eliminating interference in the transmission process.
  • the embodiments of the present invention have the following beneficial effects, do not need to perform redundant backup on a dedicated transmission line, do not limit the line type of redundant backup, do not limit the route of redundant backup, and therefore have low cost. And the implementation mode is flexible; and the appropriate increase in transmission bandwidth can achieve better anti-network damage effect in a very poor transmission environment.
  • the backup of the transmission line can be realized, and one line can be quickly restored to normal when one transmission line is disconnected, so it can be applied to a scene with strict requirements on the call loss rate; When it is opened, it does not affect the call service.
  • the quality of all line transmissions is not good, the impact of network damage on the call service is greatly reduced.
  • embodiments of the present invention can be applied not only to the video conference field but also to other multimedia fields such as video surveillance, video on demand, and VOIP.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne un procédé, un terminal et un système de transmission pour flux multimédia. Le procédé, utilisé pour la transmission de flux multimédia depuis un terminal d'émission vers un terminal de réception, permet de diviser le flux en un flux à code commun et un flux à code redondant. Le flux à code commun comprend des données complètes à transmettre, et le procédé consiste au moins: à établir au moins deux canaux pour une liaison vers un terminal de réception, l'un des canaux étant établi comme canal principal (303)sachant que ces (au moins) deux canaux pris séparément sont un canal principal et au moins un canal esclave; à collecter l'information de communication de ces (au moins) deux canaux et l'information acheminée par leur biais (305); selon l'information de communication, le canal principal est conçu pour la transmission de tout ou partie du flux à code commun; l'un quelconque des (au moins) deux canaux est conçu pour la transmission du flux à code redondant. On peut ainsi améliorer la situation du point de vue des effets défavorables au réseau dans un mauvais environnement de transmission grâce à une augmentation modérée de la largeur de bande d'émission, et réduire largement l'incidence des effets défavorables au réseau pour une partie appelante lorsque la qualité de transmission est médiocre.
PCT/CN2010/070227 2009-01-19 2010-01-15 Procédé, terminal et système de transmission pour flux multimédia WO2010081430A1 (fr)

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Application Number Priority Date Filing Date Title
CN200910077213.3 2009-01-19
CN200910077213.3A CN101489093B (zh) 2009-01-19 2009-01-19 一种会议通讯时码流的传输方法、终端和系统

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WO2010081430A1 true WO2010081430A1 (fr) 2010-07-22

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Cited By (1)

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CN112954255A (zh) * 2021-01-29 2021-06-11 深圳市捷视飞通科技股份有限公司 视频会议码流的传输方法、装置、计算机设备和存储介质

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101489093B (zh) * 2009-01-19 2010-12-08 华为终端有限公司 一种会议通讯时码流的传输方法、终端和系统
CN102118300B (zh) * 2009-12-31 2014-03-12 华为软件技术有限公司 多通道中数据流的传输方法和装置
CN111385062B (zh) * 2020-03-25 2022-05-20 京信网络系统股份有限公司 基于wdm的数据传输方法、装置、系统及存储介质
CN114584809A (zh) * 2020-12-02 2022-06-03 华为技术有限公司 数据传输方法、系统及电子设备

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP1043877A1 (fr) * 1999-04-08 2000-10-11 Lucent Technologies Inc. Méthode et appareil pour réduire le retard de démarrage dans des applications de trains de données en réseau
CN1917621A (zh) * 2005-08-17 2007-02-21 中兴通讯股份有限公司 一种会议电视系统语音通道备份的方法
CN101489093A (zh) * 2009-01-19 2009-07-22 深圳华为通信技术有限公司 一种会议通讯时码流的传输方法、终端和系统

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP1043877A1 (fr) * 1999-04-08 2000-10-11 Lucent Technologies Inc. Méthode et appareil pour réduire le retard de démarrage dans des applications de trains de données en réseau
CN1917621A (zh) * 2005-08-17 2007-02-21 中兴通讯股份有限公司 一种会议电视系统语音通道备份的方法
CN101489093A (zh) * 2009-01-19 2009-07-22 深圳华为通信技术有限公司 一种会议通讯时码流的传输方法、终端和系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112954255A (zh) * 2021-01-29 2021-06-11 深圳市捷视飞通科技股份有限公司 视频会议码流的传输方法、装置、计算机设备和存储介质
CN112954255B (zh) * 2021-01-29 2024-04-16 深圳市捷视飞通科技股份有限公司 视频会议码流的传输方法、装置、计算机设备和存储介质

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