CN108632638A - A kind of transmission method and system of multi-medium data - Google Patents
A kind of transmission method and system of multi-medium data Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2365—Multiplexing of several video streams
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/233—Processing of audio elementary streams
- H04N21/2335—Processing of audio elementary streams involving reformatting operations of audio signals, e.g. by converting from one coding standard to another
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23608—Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23614—Multiplexing of additional data and video streams
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
An embodiment of the present invention provides a kind of transmission method of multi-medium data and systems, and multiple first are deployed in depending on networking and regards networked terminals, second regarding networked terminals and regards networked server, the method includes：Multi-medium data is packaged as source transport stream by first depending on networked terminals, and is sent to regarding networked server；The multiple first multichannel source transport streams for regarding networked terminals are received depending on networked server；Networked server is regarded by multichannel source transmission flow multiplex as object transmission stream all the way；Depending on networked server according to the downstream communications link for regarding networked terminals configuration to second, the object transmission stream is sent to second and regards networked terminals.Multichannel source transmission flow multiplex is that object transmission stream is transmitted all the way, occupies a transmission channel, greatly reduces the quantity of the transmission channel of occupancy, simplify transmission link, improve the stability of system, reduce the difficulty of regulation and control.
Description
Technical field
The present invention relates to regarding networking technology field, the transmission method more particularly to a kind of multi-medium data and a kind of more matchmakers
The Transmission system of volume data.
Background technology
With the fast development regarding networking, the service communications such as video monitoring, video conference, video teaching, in the life of user
Living, work, study etc. are widely available.
In many service communications, recipient needs to receive the multi-medium data of multiple senders, per road multi-medium data
A transmission channel is occupied, more transmission channel will be occupied in a service communication, increase the unstability of system, is regulated and controled
Difficulty it is high.
Invention content
In view of the above problems, it is proposed that the embodiment of the present invention overcoming the above problem or at least partly in order to provide one kind
A kind of transmission method of the multi-medium data to solve the above problems and a kind of corresponding Transmission system of multi-medium data.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of transmission methods of multi-medium data, regarding networking
In be deployed with multiple first regard networked terminals, second regard networked terminals with regard networked server, the method includes：
Multi-medium data is packaged as source transport stream by first depending on networked terminals, and is sent to regarding networked server；
The multiple first multichannel source transport streams for regarding networked terminals are received depending on networked server；
Networked server is regarded by multichannel source transmission flow multiplex as object transmission stream all the way；
Depending on networked server according to the downstream communications link for regarding networked terminals configuration to second, the object transmission stream is sent out
It send to second and regards networked terminals.
Optionally, described first multi-medium data is packaged as source transport stream depending on networked terminals, and be sent to regarding networking clothes
Business device, including：
Multi-medium data is acquired, the multi-medium data includes video data and audio data；
The video data is encoded, the first elementary stream is obtained；
First elementary stream is packaged as the first packetized elementary stream；
The audio data is encoded, the second elementary stream is obtained；
Second elementary stream is packaged as the second packetized elementary stream；
The Table Header information of first packetized elementary stream and the Table Header information of second packetized elementary stream are inserted into
Into Program Map Table；
First packetized elementary stream, second packetized elementary stream are multiplexed with source with the Program Map Table and passed
Defeated stream.
Optionally,
It is described that first elementary stream is packaged as the first packetized elementary stream, including：
Preset first clock is called, program is generated and plays reference clock；
When first elementary stream is the first packetized elementary stream, in the header of first packetized elementary stream
The middle addition program plays reference clock；
It is described that second elementary stream is packaged as the second packetized elementary stream, including：
Preset first clock is called, program is generated and plays reference clock；
When being packaged as the second packetized elementary stream in second elementary stream, in second packetized elementary stream
The program is added in header plays reference clock.
Optionally, described to regard networked server by multichannel source transmission flow multiplex as object transmission stream all the way, including：
Multiple Program Map Tables are inquired in the transport stream of the multichannel source；
Multiple multimedia messages are inquired in the multiple Program Map Table；
The multiple multimedia messages are inserted into program association list；
Multichannel source transport stream and the program association list are multiplexed with object transmission stream all the way.
Optionally, the multimedia messages include that program plays reference clock.
Optionally, the downstream communications link that networked terminals configure is regarded according to second regarding networked server described, by institute
It states object transmission stream and is sent to second before networked terminals, further include：
Preset second clock is called, to the Program Map Table in the object transmission stream and the program in program association list
Reference clock is played to be proofreaded.
The embodiment of the invention also discloses a kind of Transmission systems of multi-medium data, and multiple first are deployed in depending on networking
Networked terminals are regarded depending on networked terminals, second and regard networked server；
Described first includes depending on networked terminals：
Source transport stream packetization module for multi-medium data to be packaged as source transport stream, and is sent to regarding networked server；
It is described to include depending on networked server：
Source transport stream receiving module, for receiving the multiple first multichannel source transport streams for regarding networked terminals；
Source transmission flow multiplex module, for being object transmission stream all the way by multichannel source transmission flow multiplex；
Object transmission stream sending module will be described for regarding the downstream communications link that networked terminals configure according to second
Object transmission stream is sent to second and regards networked terminals.
Optionally, the source transport stream packetization module includes：
Multi-medium data acquires submodule, for acquiring multi-medium data, the multi-medium data include video data with
Audio data；
Video coding submodule obtains the first elementary stream for being encoded to the video data；
Video is packaged submodule, for first elementary stream to be packaged as the first packetized elementary stream；
Audio coding submodule obtains the second elementary stream for being encoded to the audio data；
Audio is packaged submodule, for second elementary stream to be packaged as the second packetized elementary stream；
Program Map Table is inserted into submodule, is used for the Table Header information of first packetized elementary stream and described second dozen
The Table Header information of packet elementary stream is inserted into Program Map Table；
Source transmission flow multiplex submodule, for will first packetized elementary stream, second packetized elementary stream and
The Program Map Table is multiplexed with source transport stream.
Optionally,
The video is packaged submodule：
First program plays reference clock generation unit, for calling preset first clock, generates program and plays reference
Clock；
First program plays reference clock adding device, for being the first packetized elementary stream in first elementary stream
When, the program is added in the header of first packetized elementary stream plays reference clock；
The audio is packaged submodule：
Second program plays reference clock generation unit, for calling preset first clock, generates program and plays reference
Clock；
Second program plays reference clock adding device, for being packaged as the second packing base in second elementary stream
When this code stream, the program is added in the header of second packetized elementary stream and plays reference clock.
Optionally, the source transmission flow multiplex module includes：
Program Map Table inquires submodule, for inquiring multiple Program Map Tables in the transport stream of the multichannel source；
Multimedia information inquiry submodule, for inquiring multiple multimedia messages in the multiple Program Map Table；
Program association list is inserted into submodule, for the multiple multimedia messages to be inserted into program association list；
Object transmission stream is multiplexed submodule, for multichannel source transport stream and the program association list to be multiplexed with all the way
Object transmission stream.
Optionally, the multimedia messages include that program plays reference clock.
Optionally, described to further include depending on networked server：
Program plays reference clock checking module, for calling preset second clock, in the object transmission stream
Program Map Table plays reference clock with the program in program association list and is proofreaded.
The embodiment of the present invention includes following advantages：
The embodiment of the present invention applies the characteristic regarding networking, and receiving multiple first depending on networked server regards networked terminals by more matchmakers
The multichannel source transport stream that volume data is packaged, is multiplexed with object transmission stream all the way, according to the downlink for regarding networked terminals configuration to second
Communication link is sent to second and regards networked terminals：
First, multichannel source transmission flow multiplex is that object transmission stream is transmitted all the way, occupies a transmission channel, subtracts significantly
The quantity for having lacked the transmission channel occupied, simplifies transmission link, improves the stability of system, reduce the difficulty of regulation and control；
Secondly, based on the characteristic regarding networking, some tables can be saved, retain multi-medium data packet, Program Map Table
The tables such as PMT, program association list PAT reduce treating capacity, save bandwidth；For example, based on the function of safety protection regarding networking, no
It needs the interference of data to handle, conditional access list CAT can be saved；The logical of user's selection is not needed in the transmission depending on networking
The mapping of road frequency and service, modulating characteristic, satellite pulse transmitter number etc., can save network information table NIT；In addition it is not required to
It wants convection current to be described, programme information flow table SDT, etc. can be saved.
Furthermore the object transmission stream in transmission belongs to transport stream TS, uses the pack arrangement of regular length, works as transmission error code
When destroying the synchronizing information of a certain data packet, second can be in the synchronization during fixed position detection is wrapped behind it depending on networked terminals
Information avoids information loss to restore synchronous；Program Map Table PMT, program association list are added in object transmission stream
The index of the tables such as PAT, any segment of object transmission stream start independently to decode and play.
Description of the drawings
Fig. 1 is a kind of networking schematic diagram regarding networking of one embodiment of the invention；
Fig. 2 is a kind of hardware architecture diagram of node server of one embodiment of the invention；
Fig. 3 is a kind of hardware architecture diagram of access switch of one embodiment of the invention；
Fig. 4 is that a kind of Ethernet association of one embodiment of the invention turns the hardware architecture diagram of gateway；
Fig. 5 is a kind of step flow chart of the transmission method of multi-medium data of one embodiment of the invention；
Fig. 6 is a kind of configuration diagram of system of one embodiment of the invention；
Fig. 7 is a kind of structure diagram of the Transmission system of multi-medium data of one embodiment of the invention.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
It is the important milestone of network Development depending on networking, is a real-time network, can realize HD video real-time Transmission,
Push numerous the Internet, applications to HD video, high definition is face-to-face.
Real-time high-definition video switching technology is used depending on networking, it can be such as high in a network platform by required service
Clear video conference, Intellectualized monitoring analysis, emergency command, digital broadcast television, delay TV, the Web-based instruction, shows video monitoring
Field live streaming, VOD program requests, TV Mail, individual character recording (PVR), Intranet (manage) channel, intelligent video Broadcast Control, information publication by oneself
All be incorporated into a system platform etc. services such as tens of kinds of videos, voice, picture, word, communication, data, by TV or
Computer realizes that high-definition quality video plays.
To make those skilled in the art more fully understand the embodiment of the present invention, below to being introduced depending on networking：
Depending on networking, applied portion of techniques is as described below：
Network technology (Network Technology)
Network technology innovation depending on networking improves traditional ethernet (Ethernet), potential huge on network to face
Video flow.(Circuit is exchanged different from simple network packet packet switch (Packet Switching) or lattice network
Switching), Streaming demands are met using Packet Switching depending on networking technology.Has grouping depending on networking technology
Flexible, the simple and low price exchanged, is provided simultaneously with quality and the safety assurance of circuit switching, it is virtually electric to realize the whole network switch type
The seamless connection of road and data format.
Switching technology (Switching Technology)
Depending on two advantages of asynchronous and packet switch networked using Ethernet, it is scarce under the premise of complete be compatible with to eliminate Ethernet
It falls into, has the end-to-end seamless connection of the whole network, direct user terminal directly carries IP data packets.User data is in network-wide basis
It is not required to any format conversion.It is the more advanced form of Ethernet depending on networking, is a real-time exchange platform, can realizes at present mutually
The whole network large-scale high-definition realtime video transmission that networking cannot achieve pushes numerous Internet video applications to high Qinghua, unitizes.
Server technology (Server Technology)
It is different from traditional server, its Streaming Media depending on the server technology in networking and unified video platform
Transmission be built upon it is connection-oriented on the basis of, data-handling capacity is unrelated with flow, communication time, single network layer energy
Enough include signaling and data transmission.For voice and video business, handled depending on networking and unified video platform Streaming Media
Complexity many simpler than data processing, efficiency substantially increase hundred times or more than traditional server.
Reservoir technology (Storage Technology)
The ultrahigh speed reservoir technology of unified video platform in order to adapt to the media content of vast capacity and super-flow and
State-of-the-art real time operating system is used, the programme information in server instruction is mapped to specific hard drive space, media
Content is no longer pass through server, and moment is directly delivered to user terminal, and user waits for typical time to be less than 0.2 second.It optimizes
Sector distribution greatly reduces the mechanical movement of hard disc magnetic head tracking, and resource consumption only accounts for the 20% of the internets ad eundem IP, but
The concurrent flow more than 3 times of traditional disk array is generated, overall efficiency promotes 10 times or more.
Network security technology (Network Security Technology)
Structural design depending on networking by servicing independent licence system, equipment and the modes such as user data is completely isolated every time
The network security problem that puzzlement internet has thoroughly been eradicated from structure, does not need antivirus applet, fire wall generally, has prevented black
The attack of visitor and virus, provide structural carefree secure network to the user.
Service innovative technology (Service Innovation Technology)
Business and transmission are merged by unified video platform, whether single user, private user or a net
The sum total of network is all only primary automatic connection.User terminal, set-top box or PC are attached directly to unified video platform, obtain rich
The multimedia video service of rich colorful various forms.Unified video platform is substituted using " menu type " with table schema traditional
Complicated applications program, and can use considerably less code that complicated application can be realized, and realize the new business innovation of " endless ".
Networking depending on networking is as described below：
It is a kind of central controlled network structure depending on networking, which can be Tree Network, Star network, ring network etc. class
Type, but centralized control node is needed to control whole network in network on this basis.
As shown in Figure 1, being divided into access net and Metropolitan Area Network (MAN) two parts depending on networking.
The equipment of access mesh portions can be mainly divided into 3 classes：Node server, access switch, terminal (including various machines
Top box, encoding board, memory etc.).Node server is connected with access switch, and access switch can be with multiple terminal phases
Even, and Ethernet can be connected.
Wherein, node server is the node that centralized control functions are played in access net, can control access switch and terminal.
Node server can directly be connected with access switch, can also directly be connected with terminal.
Similar, the equipment of metropolitan area mesh portions can also be divided into 3 classes：Metropolitan area server, node switch, node serve
Device.Metropolitan area server is connected with node switch, and node switch can be connected with multiple node servers.
Wherein, node server is the node server for accessing mesh portions, i.e. node server had both belonged to access wet end
Point, and belong to metropolitan area mesh portions.
Metropolitan area server is the node that centralized control functions are played in Metropolitan Area Network (MAN), can control node switch and node serve
Device.Metropolitan area server can be directly connected to node switch, can also be directly connected to node server.
It can be seen that be entirely a kind of central controlled network structure of layering depending on networking network, and node server and metropolitan area
The network controlled under server can be the various structures such as tree-shaped, star-like, cyclic annular.
Visually claim, access mesh portions can form unified video platform (part in virtual coil), and multiple unified videos are flat
Platform can be formed regarding networking；Each unified video platform can be interconnected by metropolitan area and wide area depending on networking.
Classify depending on networked devices
1.1 embodiment of the present invention can be mainly divided into 3 classes depending on the equipment in networking：Server, interchanger (including ether
Net gateway), terminal (including various set-top boxes, encoding board, memory etc.).Depending on networking can be divided on the whole Metropolitan Area Network (MAN) (or
National net, World Wide Web etc.) and access net.
The equipment of 1.2 wherein access mesh portions can be mainly divided into 3 classes：Node server, access switch (including ether
Net gateway), terminal (including various set-top boxes, encoding board, memory etc.).
The particular hardware structure of each access network equipment is：
Node server：
As shown in Fig. 2, including mainly Network Interface Module 201, switching engine module 202, CPU module 203, disk array
Module 204；
Wherein, Network Interface Module 201, the Bao Jun that CPU module 203, disk array module 204 are come in enter switching engine
Module 202；Switching engine module 202 to the packet come in look into the operation of address table 205, to obtain the navigation information of packet；
And the packet is stored according to the navigation information of packet the queue of corresponding pack buffer 206；If the queue of pack buffer 206 is close
It is full, then it abandons；All pack buffer queues of 202 poll of switching engine mould, are forwarded if meeting the following conditions：1) port
It is less than to send caching；2) the queue package counting facility is more than zero.Disk array module 204 mainly realizes the control to hard disk, including
The operations such as initialization, read-write to hard disk；CPU module 203 is mainly responsible between access switch, terminal (not shown)
Protocol processes, to address table 205 (including descending protocol packet address table, uplink protocol package address table, data packet addressed table)
Configuration, and, the configuration to disk array module 204.
Access switch：
As shown in figure 3, including mainly Network Interface Module (downstream network interface module 301, uplink network interface module
302), switching engine module 303 and CPU module 304；
Wherein, the packet (upstream data) that downstream network interface module 301 is come in enters packet detection module 305；Packet detection mould
Whether mesh way address (DA), source address (SA), type of data packet and the packet length of the detection packet of block 305 meet the requirements, if met,
Corresponding flow identifier (stream-id) is then distributed, and enters switching engine module 303, is otherwise abandoned；Uplink network interface mould
The packet (downlink data) that block 302 is come in enters switching engine module 303；The data packet that CPU module 204 is come in enters switching engine
Module 303；Switching engine module 303 to the packet come in look into the operation of address table 306, to obtain the navigation information of packet；
It is gone toward uplink network interface if the packet into switching engine module 303 is downstream network interface, in conjunction with flow identifier
(stream-id) packet is stored in the queue of corresponding pack buffer 307；If the queue of the pack buffer 307 is close full,
It abandons；If the packet into switching engine module 303 is not that downstream network interface is gone toward uplink network interface, according to packet
Navigation information is stored in the data packet queue of corresponding pack buffer 307；If the queue of the pack buffer 307 is close full,
Then abandon.
All pack buffer queues of 303 poll of switching engine module, are divided to two kinds of situations in embodiments of the present invention：
It is gone toward uplink network interface if the queue is downstream network interface, meets the following conditions and be forwarded：1)
It is less than that the port sends caching；2) the queue package counting facility is more than zero；3) token that rate control module generates is obtained；
It is gone toward uplink network interface if the queue is not downstream network interface, meets the following conditions and be forwarded：
1) it is less than to send caching for the port；2) the queue package counting facility is more than zero.
Rate control module 208 is configured by CPU module 204, to all downlink networks in programmable interval
The pack buffer queue that interface is gone toward uplink network interface generates token, to control the code check of forwarded upstream.
CPU module 304 is mainly responsible for the protocol processes between node server, the configuration to address table 306, and,
Configuration to rate control module 308.
Ethernet association turns gateway：
As shown in figure 4, including mainly Network Interface Module (downstream network interface module 401, uplink network interface module
402), switching engine module 403, CPU module 404, packet detection module 405, rate control module 408, address table 406, Bao Huan
Storage 407 and MAC add modules 409, MAC removing modules 410.
Wherein, the data packet that downstream network interface module 401 is come in enters packet detection module 405；Packet detection module 405 is examined
The ethernet mac DA of measured data packet, ethernet mac SA, Ethernet length or frame type, networking mesh way address is regarded
DA, whether meet the requirements depending on networking source address SA, depending on networking data Packet type and packet length, corresponding stream is distributed if meeting
Identifier (stream-id)；Then, MAC DA, MAC SA, length or frame type are subtracted by MAC removing modules 410
(2byte), and enter corresponding order caching, otherwise abandon；
Downstream network interface module 401 detects the transmission caching of the port, if there is Bao Ze regarding with networking mesh according to packet
Address D A knows the ethernet mac DA of corresponding terminal, adds the ethernet mac DA of terminal, Ethernet assists the MAC for turning gateway
SA, Ethernet length or frame type, and send.
The function that Ethernet association turns other modules in gateway is similar with access switch.
Terminal：
Include mainly Network Interface Module, Service Processing Module and CPU module；For example, set-top box mainly connects including network
Mouth mold block, video/audio encoding and decoding engine modules, CPU module；Encoding board includes mainly Network Interface Module, video encoding engine
Module, CPU module；Memory includes mainly Network Interface Module, CPU module and disk array module.
The equipment of 1.3 metropolitan area mesh portions can be mainly divided into 2 classes：Node server, node switch, metropolitan area server.
Wherein, node switch includes mainly Network Interface Module, switching engine module and CPU module；Metropolitan area server includes mainly
Network Interface Module, switching engine module and CPU module are constituted.
2, networking data package definition is regarded
2.1 access network data package definitions
The data packet for accessing net includes mainly following sections：Destination address (DA), source address (SA), reserve bytes,
payload(PDU)、CRC。
As shown in the table, the data packet for accessing net includes mainly following sections：
| DA | SA | Reserved | Payload | CRC |
Wherein：
Destination address (DA) is made of 8 bytes (byte), and first character section indicates type (such as the various associations of data packet
Discuss packet, multicast packet, unicast packet etc.), be up to 256 kinds of possibility, the second byte to the 6th byte is metropolitan area net address,
Seven, the 8th bytes are access net address；
Source address (SA) is also to be made of 8 bytes (byte), is defined identical as destination address (DA)；
Reserve bytes are made of 2 bytes；
The parts payload have different length according to the type of different datagrams, are if it is various protocol packages
64 bytes are 32+1024=1056 bytes if it is single group unicast packets words, are not restricted to above 2 kinds certainly；
CRC is made of 4 bytes, and computational methods follow the Ethernet CRC algorithm of standard.
2.2 Metropolitan Area Network (MAN) packet definitions
The topology of Metropolitan Area Network (MAN) is pattern, may there is 2 kinds, connection even of more than two kinds, i.e. node switching between two equipment
2 kinds can be all can exceed that between machine and node server, node switch and node switch, node switch and node server
Connection.But the metropolitan area net address of metropolitan area network equipment is unique, is closed to accurately describe the connection between metropolitan area network equipment
System, introduces parameter in embodiments of the present invention：Label uniquely describes a metropolitan area network equipment.
(Multi-Protocol Label Switch, multiprotocol label are handed over by the definition of label and MPLS in this specification
Change) label definition it is similar, it is assumed that between device A and equipment B there are two connection, then data packet from device A to equipment B just
There are 2 labels, data packet also there are 2 labels from equipment B to device A.Label is divided into label, outgoing label, it is assumed that data packet enters
The label (entering label) of device A is 0x0000, and the label (outgoing label) when this data packet leaves device A may reform into
0x0001.The networking flow of Metropolitan Area Network (MAN) is to enter network process under centralized control, also means that address distribution, the label of Metropolitan Area Network (MAN)
Distribution is all dominated by metropolitan area server, and node switch, node server are all passive execution, this point with
The label distribution of MPLS is different, and the distribution of the label of MPLS is the result that interchanger, server are negotiated mutually.
As shown in the table, the data packet of Metropolitan Area Network (MAN) includes mainly following sections：
| DA | SA | Reserved | Label | Payload | CRC |
That is destination address (DA), source address (SA), reserve bytes (Reserved), label, payload (PDU), CRC.Its
In, the format of label, which can refer to, such as gives a definition：Label is 32bit, wherein high 16bit retains, only with low 16bit, its position
Set is between the reserve bytes and payload of data packet.
Based on the above-mentioned characteristic regarding networking, it is proposed that one of the core concepts of the embodiments of the present invention, it then follows regard the association of networking
View, is multiplexed with multi-medium data all the way by multichannel multi-medium data and is transmitted.
With reference to Fig. 5, a kind of step flow chart of the transmission method of multi-medium data of one embodiment of the invention is shown,
This method can be applied to regard in networking, can specifically include following steps：
Step 501, first multi-medium data is packaged as source transport stream depending on networked terminals, and be sent to regarding the Internet services
Device.
As shown in fig. 6, being deployed in depending on networking 600 networked terminals 621 and one are regarded regarding networked server 610, first
Or multiple second regard networked terminals 622.
In the concrete realization, first networked terminals 621 are regarded and second to regard networked terminals 622 can be set-top box
Box on (SetTopBox, STB), commonly referred to as set-top box or machine is the equipment of connection a television set and outside source, it
The digital signal of compression can be changed into television content, and shown on a television set.
In general, set-top box connects other equipment 630, for example, camera and microphone can be connected, regarded for acquiring
The multi-medium datas such as frequency evidence and audio data, can also connect television set, more for playing video data and audio data etc.
Media data.
In embodiments of the present invention, multiple first can be applied depending on networked terminals depending on networked terminals and second it is logical in video
In the scenes such as words, video conference, video monitoring, multiple first acquire multichannel multi-medium data depending on networked terminals respectively, by regarding
The agreement of networking, is sent to regarding networked server, and multichannel multi-medium data is multiplexed with multimedia number all the way depending on networked server
According to, be forwarded to second regard networked terminals.
In one embodiment of the invention, step 501 may include following sub-step：
Sub-step S11 acquires multi-medium data.
Wherein, multi-medium data includes video data and audio data.
Sub-step S12 encodes the video data, obtains the first elementary stream.
First elementary stream is packaged as the first packetized elementary stream by sub-step S13.
Sub-step S14 encodes the audio data, obtains the second elementary stream.
Second elementary stream is packaged as the second packetized elementary stream by sub-step S15.
Sub-step S16, by the table of the Table Header information of first packetized elementary stream and second packetized elementary stream
Header is inserted into Program Map Table.
Sub-step S17, by first packetized elementary stream, second packetized elementary stream and the Program Map Table
It is multiplexed with source transport stream.
In embodiments of the present invention, encoder can be called to encode video data, such as H.264, obtains the first base
This code stream, and then the first elementary stream is packaged as the first packetized elementary stream.
Similarly, call encoder to encode audio data, as AAC (Advanced Audio Coding, it is advanced
Audio coding), the second elementary stream is obtained, and then the second elementary stream is packaged as the second packetized elementary stream.
It should be noted that the first elementary stream and the second elementary stream belong to elementary stream (Elementary
Stream, ES), the first packetized elementary stream belongs to elementary stream (Packet Elemental with the second packetized elementary stream
Stream, PES).
For elementary stream ES, elementary stream ES can be flowed according to the system layer part of standards of ISO/IEC 13818-1
It is packaged into packetized elementary stream PES, wherein the data packet of packetized elementary stream PES includes packet initial code, PES leaders will, PES
The data such as packet header domain and payload data.
The initial code of the data packet of packetized elementary stream PES is made of the start code prefix and traffic identifier wrapped, packet initial code
Prefix is a fixed codeword structure, its value is 0x000001, is synchronized to PES packets for transmitting-receiving two-end.
Traffic identifier sets basic stream type, each elementary stream ES that encoder is generated is assigned uniquely
Distinguishing mark ID number.
The packet header of the data packet of packetized elementary stream PES includes the priority of stream, scrambling control, CRC, ES flow velocity, display
Timestamp PTS and decoding time stamp DTS etc..
On the one hand, preset first clock (such as 27M clocks) can be called, program is generated and plays reference clock (Program
Clock Reference, PCR),
When the first elementary stream is the first packetized elementary stream, section is added in the header of the first packetized elementary stream
Mesh plays reference clock PCR.
On the other hand, preset first clock (such as 27M clocks) can be called, program is generated and plays reference clock PCR.
When being packaged as the second packetized elementary stream in the second elementary stream, in the header of the second packetized elementary stream
It adds program and plays reference clock PCR.
In embodiments of the present invention, the Table Header information of the first packetized elementary stream and the second packetized elementary stream is inserted into
In corresponding Program Map Table (program map tables, PMT) table, then by Program Map Table pmt table and corresponding first
Packetized elementary stream is multiplexed with the source transport stream of single channel with the second packetized elementary stream.
It should be noted that source transport stream belongs to transport stream (Transport Stream, TS).
During code multiplexing, by the advanced programs of the decoding time DTS of detection frame play reference clock PCR when
Between the relationship of value and some threshold values decide whether to send this frame data.
In the concrete realization, such as excessively advanced time value is greater than or equal to threshold values, then sends empty packet when being less than threshold values
Next frame data can be sent.
If advanced time value is less than threshold values, can continue to send the frame data.
When filling empty packet in transport stream TS, program, which plays reference clock PCR, linearly to be increased with being incremented by for transmitted bit
Long, the decoding time stamp DTS of PES Packet Elementary Stream PES is then remained unchanged；When transport stream TS sends the transmission packet containing basic flow, section
Mesh plays reference clock PCR also will be lasted for step-length Spline smoothing with same regular increase, decoding time stamp DTS with frame, i.e., often
It is incremental primary to transfer a frame data, incremental steps are lasted for frame.
Program plays the continuous slowly uniformly growths of reference clock PCR, and then fast step increases decoding time stamp DTS, filling
Empty Bao Zeneng balance is around here soon with slow relationship, and program plays the average growth rate of reference clock PCR and is equal to solution when final result
The average growth rate of code time stamp DTS.
Step 502, the multiple first multichannel source transport streams for regarding networked terminals are received depending on networked server.
In embodiments of the present invention, each first networked terminals synthesis source transport stream all the way is regarded, be sent to regarding the Internet services
Device, multiple first converge in depending on the multichannel source transport streams of networked terminals in networked server.
Step 503, networked server is regarded by multichannel source transmission flow multiplex as object transmission stream all the way.
In the concrete realization, multiplexer can be called depending on networked server, is target all the way by multichannel source transmission flow multiplex
Transport stream, the object transmission stream also belong to transport stream TS.
In one embodiment of the invention, step 503 may include following sub-step：
Sub-step S21 inquires multiple Program Map Tables in the transport stream of the multichannel source.
Sub-step S22 inquires multiple multimedia messages in the multiple Program Map Table.
The multiple multimedia messages are inserted into program association list by sub-step S23.
Multichannel source transport stream and the program association list are multiplexed with object transmission stream all the way by sub-step S24.
When multichannel source transmission flow multiplex is at object transmission stream all the way, each road source transport stream is collected and analyzes its code
Stream, obtains corresponding multimedia messages in the transport stream of each road source, including the code check of video, audio, data information, to each road program
Packet mark PID, program play reference clock PCR etc., insert it into corresponding program association list (program
Association table, PAT) in.
When occur in the transport stream of two-way source packet mark PID clash when, need modification all the way or multichannel source transmission
The packet of a certain data flow identifies PID in stream.
Regardless of whether there are packet mark PID conflicts, multiplexer is required for reconfiguration information, in the processing of filtering, is carrying
In the data packet for having the source transport stream of adjustment field, the value that reference clock PCR flag bit fields are played with program is judged, if
The value is that " 1 " needs the program in the data packet to source transport stream to play then at the time of the source transport stream leaves multiplexer
Reference clock PCR, which is done, corrects or reinserts accordingly new program broadcasting reference clock PCR.
There is multiplexed program in multiplexed object transmission stream, originally per the Program Map Table PAT and program in program all the way
Association list PMT only has the content of itself, needs to replace Program Map Table PAT and program association list PMT thus.
First according to the number of inlet flow, then exist in dynamic generation program association list PAT, Program Map Table PMT at the beginning
First calculated is good, generates static Program Map Table PMT and corresponds to replacement, while according to the packet of each Program Map Table PMT
Mark PID finds the Program Map Table pmt table realized and calculated, and packet therein mark PID is found, as the packet that will be replaced
Identify PID.
Place generate at the beginning or directly use static table, be because of program association list PAT and Program Map Table PMT
There are 32 CRC, can not complete to calculate in real time.
After Program Map Table pmt table is replaced, corresponding replace is answered per the packet mark PID of original video and audio frame in flowing all the way
The packet mark PID of video and audio in the Program Map Table pmt table changed is consistent, that is, is carried out packet mark PID and remapped.
In transmission process, the TS frames of each reading are first analyzed, according to the difference of packet mark PID, select to replace interior
Hold, if it is program association list PAT and Program Map Table pmt table, then entire TS frames replacement, if it is video and audio frame, is then only replaced
Packet mark PID is changed, after replacement, it should to continuous counter plus one.
Step 504, depending on networked server according to the downstream communications link for regarding networked terminals configuration to second, by the target
Transport stream is sent to second and regards networked terminals.
Before sending object transmission stream, preset second clock can be called, to the program map in object transmission stream
Table PMT plays reference clock PCR with the program in program association list PAT and is proofreaded.
In order to ensure that program plays the accurate of reference clock PCR, first regards the first clock of networked terminals and regarding networking clothes
The second clock configuration of business device is identical, is such as 27M clocks.
Multiplexed object transmission stream is sent to second depending on networked server and regards networked terminals, second can depending on networked terminals
It is played out with demultiplexing one or more source transport stream therein.
In this practical application, networking is regarded as the network with centralized control functions, including main control server and undernet
Equipment, which includes terminal, and one of the core idea depending on networking is, by notifying to exchange by main control server
Equipment is directed to when time downstream communications link of service matches table, and the table for being then based on the configuration carries out the transmission of data packet.
That is, including depending on the communication means in networking：
Main control server configuration is when time downstream communications link of service；
Work as time data packet of service by what source terminal was sent, target terminal is sent to (such as according to the downstream communications link
Second regards networked terminals).
In embodiments of the present invention, it configures when time downstream communications link of service includes：Notice is logical when time downlink of service
Believe that the switching equipment involved by link matches table；
Furthermore, include according to downstream communications link transmission：Inquiry configured table, switching equipment is to being received
Data packet is transmitted by corresponding port.
In the concrete realization, service includes unicast communication service and Multicast Communication Service.I.e. either cast communication is still
Unicast communication can use the above-mentioned core idea with table-table to realize the communication regarded in networking.
As previously mentioned, including access mesh portions regarding networking, in access is netted, which is node server, under
The grade network equipment includes access switch and terminal.
For the unicast communication service during access is netted, the main control server configuration is when time downlink communication chain of service
The step of road, may comprise steps of：
Sub-step S31, the service request protocol package that main control server is initiated according to source terminal are obtained when time downlink of service
Communication link information, downstream communications link information include participating in when time downlink of the main control server and access switch of service
Communication port information；
Sub-step S32, downstream communication ports information of the main control server according to control server, data packet inside it
The downlink port that setting is oriented to when time data packet of service in the table of location；And believe according to the downstream communication ports of access switch
Breath, to corresponding access switch sending port configuration order；
Sub-step S33, access switch according in port configuration command data packet addressed table inside it, setting when time
The downlink port that the data packet of service is oriented to.
For the Multicast Communication Service (such as video conference) during access is netted, main control server is obtained when under time service
The step of row communication link information may include following sub-step：
Sub-step S41, main control server obtain the service request agreement for the application Multicast Communication Service that target terminal is initiated
Packet, service request protocol package includes the access net address of service type information, service content information and target terminal；Wherein,
Service content information includes service number；
Sub-step S42, main control server according to the service number in preset content-address mapping table, extraction source
The access net address of terminal；
Sub-step S43, main control server obtains the corresponding multicast address of source terminal, and distributes to target terminal；And according to
According to the access net address of service type information, source terminal and target terminal, the communication link information when time multicast services is obtained.
The embodiment of the present invention includes following advantages：
The embodiment of the present invention applies the characteristic regarding networking, and receiving multiple first depending on networked server regards networked terminals by more matchmakers
The multichannel source transport stream that volume data is packaged, is multiplexed with object transmission stream all the way, according to the downlink for regarding networked terminals configuration to second
Communication link is sent to second and regards networked terminals：
First, multichannel source transmission flow multiplex is that object transmission stream is transmitted all the way, occupies a transmission channel, subtracts significantly
The quantity for having lacked the transmission channel occupied, simplifies transmission link, improves the stability of system, reduce the difficulty of regulation and control；
Secondly, based on the characteristic regarding networking, some tables can be saved, retain multi-medium data packet, Program Map Table
The tables such as PMT, program association list PAT reduce treating capacity, save bandwidth；For example, based on the function of safety protection regarding networking, no
It needs the interference of data to handle, conditional access list CAT can be saved；The logical of user's selection is not needed in the transmission depending on networking
The mapping of road frequency and service, modulating characteristic, satellite pulse transmitter number etc., can save network information table NIT；In addition it is not required to
It wants convection current to be described, programme information flow table SDT, etc. can be saved.
Furthermore the object transmission stream in transmission belongs to transport stream TS, uses the pack arrangement of regular length, works as transmission error code
When destroying the synchronizing information of a certain data packet, second can be in the synchronization during fixed position detection is wrapped behind it depending on networked terminals
Information avoids information loss to restore synchronous；Program Map Table PMT, program association list are added in object transmission stream
The index of the tables such as PAT, any segment of object transmission stream start independently to decode and play.
It should be noted that for embodiment of the method, for simple description, therefore it is all expressed as a series of action group
It closes, but those skilled in the art should understand that, the embodiment of the present invention is not limited by the described action sequence, because according to
According to the embodiment of the present invention, certain steps can be performed in other orders or simultaneously.Secondly, those skilled in the art also should
Know, embodiment described in this description belongs to preferred embodiment, and the involved action not necessarily present invention is implemented
Necessary to example.
With reference to Fig. 7, a kind of structure diagram of the Transmission system of multi-medium data of one embodiment of the invention is shown,
Networked terminals 710, second are regarded regarding networked terminals 720 and regarding networked server 730 depending on being deployed with multiple first in networking；
Described first includes depending on networked terminals 710：
Source transport stream packetization module 711 for multi-medium data to be packaged as source transport stream, and is sent to regarding the Internet services
Device；
It is described to include depending on networked server 730：
Source transport stream receiving module 731, for receiving the multiple first multichannel source transport streams for regarding networked terminals；
Source transmission flow multiplex module 732, for being object transmission stream all the way by multichannel source transmission flow multiplex；
Object transmission stream sending module 733, for regarding the downstream communications link that networked terminals configure according to second, by institute
It states object transmission stream and is sent to second regarding networked terminals.
In one embodiment of the invention, the source transport stream packetization module 711 includes：
Multi-medium data acquires submodule, for acquiring multi-medium data, the multi-medium data include video data with
Audio data；
Video coding submodule obtains the first elementary stream for being encoded to the video data；
Video is packaged submodule, for first elementary stream to be packaged as the first packetized elementary stream；
Audio coding submodule obtains the second elementary stream for being encoded to the audio data；
Audio is packaged submodule, for second elementary stream to be packaged as the second packetized elementary stream；
Program Map Table is inserted into submodule, is used for the Table Header information of first packetized elementary stream and described second dozen
The Table Header information of packet elementary stream is inserted into Program Map Table；
Source transmission flow multiplex submodule, for will first packetized elementary stream, second packetized elementary stream and
The Program Map Table is multiplexed with source transport stream.
In one embodiment of the invention, the video packing submodule includes：
First program plays reference clock generation unit, for calling preset first clock, generates program and plays reference
Clock；
First program plays reference clock adding device, for being the first packetized elementary stream in first elementary stream
When, the program is added in the header of first packetized elementary stream plays reference clock；
The audio is packaged submodule：
Second program plays reference clock generation unit, for calling preset first clock, generates program and plays reference
Clock；
Second program plays reference clock adding device, for being packaged as the second packing base in second elementary stream
When this code stream, the program is added in the header of second packetized elementary stream and plays reference clock.
In one embodiment of the invention, the source transmission flow multiplex module 732 includes：
Program Map Table inquires submodule, for inquiring multiple Program Map Tables in the transport stream of the multichannel source；
Multimedia information inquiry submodule, for inquiring multiple multimedia messages in the multiple Program Map Table；
Program association list is inserted into submodule, for the multiple multimedia messages to be inserted into program association list；
Object transmission stream is multiplexed submodule, for multichannel source transport stream and the program association list to be multiplexed with all the way
Object transmission stream.
In one embodiment of the invention, the multimedia messages include that program plays reference clock.
In one embodiment of the invention, described to further include depending on networked server 730：
Program plays reference clock checking module, for calling preset second clock, in the object transmission stream
Program Map Table plays reference clock with the program in program association list and is proofreaded.
For system embodiments, since it is basically similar to the method embodiment, so fairly simple, the correlation of description
Place illustrates referring to the part of embodiment of the method.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiment, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can be provided as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be with reference to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in flow and/or box combination.These can be provided
Computer program instructions are set to all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine so that is held by the processor of computer or other programmable data processing terminal equipments
Capable instruction generates for realizing in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes
The device of specified function.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing terminal equipments
In computer-readable memory operate in a specific manner so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one flow of flow chart or multiple flows and/or one side of block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing terminal equipments so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one flow of flow chart or multiple flows
And/or in one box of block diagram or multiple boxes specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also include other elements that are not explicitly listed, or further include for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device including the element.
Above to a kind of transmission system of the transmission method and a kind of multi-medium data of multi-medium data provided by the present invention
System, is described in detail, and principle and implementation of the present invention are described for specific case used herein, above
The explanation of embodiment is merely used to help understand the method and its core concept of the present invention；Meanwhile for the general skill of this field
Art personnel, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this
Description should not be construed as limiting the invention.
Claims (10)
1. a kind of transmission method of multi-medium data, which is characterized in that be deployed in depending on networking multiple first regard networked terminals,
Second regards networked terminals and regards networked server, the method includes：
Multi-medium data is packaged as source transport stream by first depending on networked terminals, and is sent to regarding networked server；
The multiple first multichannel source transport streams for regarding networked terminals are received depending on networked server；
Networked server is regarded by multichannel source transmission flow multiplex as object transmission stream all the way；
Depending on networked server according to the downstream communications link for regarding networked terminals configuration to second, the object transmission stream is sent to
Second regards networked terminals.
2. according to the method described in claim 1, it is characterized in that, described first is packaged as multi-medium data depending on networked terminals
Source transport stream, and be sent to regarding networked server, including：
Multi-medium data is acquired, the multi-medium data includes video data and audio data；
The video data is encoded, the first elementary stream is obtained；
First elementary stream is packaged as the first packetized elementary stream；
The audio data is encoded, the second elementary stream is obtained；
Second elementary stream is packaged as the second packetized elementary stream；
The Table Header information of the Table Header information of first packetized elementary stream and second packetized elementary stream is inserted into section
In mesh mapping table；
First packetized elementary stream, second packetized elementary stream and the Program Map Table are multiplexed with source transmission
Stream.
3. according to the method described in claim 2, it is characterized in that,
It is described that first elementary stream is packaged as the first packetized elementary stream, including：
Preset first clock is called, program is generated and plays reference clock；
When first elementary stream is the first packetized elementary stream, add in the header of first packetized elementary stream
The program is added to play reference clock；
It is described that second elementary stream is packaged as the second packetized elementary stream, including：
Preset first clock is called, program is generated and plays reference clock；
When being packaged as the second packetized elementary stream in second elementary stream, believe in the head of second packetized elementary stream
The program is added in breath plays reference clock.
4. method according to claim 1 or 2 or 3, which is characterized in that described to pass the multichannel source regarding networked server
Defeated stream is multiplexed with object transmission stream all the way, including：
Multiple Program Map Tables are inquired in the transport stream of the multichannel source；
Multiple multimedia messages are inquired in the multiple Program Map Table；
The multiple multimedia messages are inserted into program association list；
Multichannel source transport stream and the program association list are multiplexed with object transmission stream all the way.
5. according to the method described in claim 4, it is characterized in that, the multimedia messages, which include program, plays reference clock.
6. according to the method described in claim 4, it is characterized in that, regarding networking eventually according to second in the networked server that regards
The object transmission stream is sent to second before networked terminals, further includes by the downstream communications link for holding configuration：
Preset second clock is called, the Program Map Table in the object transmission stream is played with the program in program association list
Reference clock is proofreaded.
7. a kind of Transmission system of multi-medium data, which is characterized in that be deployed in depending on networking multiple first regard networked terminals,
Second regards networked terminals and regards networked server；
Described first includes depending on networked terminals：
Source transport stream packetization module for multi-medium data to be packaged as source transport stream, and is sent to regarding networked server；
It is described to include depending on networked server：
Source transport stream receiving module, for receiving the multiple first multichannel source transport streams for regarding networked terminals；
Source transmission flow multiplex module, for being object transmission stream all the way by multichannel source transmission flow multiplex；
Object transmission stream sending module, for regarding the downstream communications link that networked terminals configure according to second, by the target
Transport stream is sent to second and regards networked terminals.
8. system according to claim 7, which is characterized in that the source transport stream packetization module includes：
Multi-medium data acquires submodule, and for acquiring multi-medium data, the multi-medium data includes video data and audio
Data；
Video coding submodule obtains the first elementary stream for being encoded to the video data；
Video is packaged submodule, for first elementary stream to be packaged as the first packetized elementary stream；
Audio coding submodule obtains the second elementary stream for being encoded to the audio data；
Audio is packaged submodule, for second elementary stream to be packaged as the second packetized elementary stream；
Program Map Table is inserted into submodule, for the Table Header information of first packetized elementary stream and described second to be packaged base
The Table Header information of this code stream is inserted into Program Map Table；
Source transmission flow multiplex submodule, for by first packetized elementary stream, second packetized elementary stream with it is described
Program Map Table is multiplexed with source transport stream.
9. system according to claim 8, which is characterized in that
The video is packaged submodule：
First program plays reference clock generation unit, for calling preset first clock, generates program and plays reference clock；
First program plays reference clock adding device, is used for when first elementary stream is the first packetized elementary stream,
The program is added in the header of first packetized elementary stream plays reference clock；
The audio is packaged submodule：
Second program plays reference clock generation unit, for calling preset first clock, generates program and plays reference clock；
Second program plays reference clock adding device, for being packaged as the second packing basic code in second elementary stream
When stream, the program is added in the header of second packetized elementary stream and plays reference clock.
10. according to the system described in claim 7 or 8 or 9, which is characterized in that the source transmission flow multiplex module includes：
Program Map Table inquires submodule, for inquiring multiple Program Map Tables in the transport stream of the multichannel source；
Multimedia information inquiry submodule, for inquiring multiple multimedia messages in the multiple Program Map Table；
Program association list is inserted into submodule, for the multiple multimedia messages to be inserted into program association list；
Object transmission stream is multiplexed submodule, for multichannel source transport stream and the program association list to be multiplexed with target all the way
Transport stream.
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| Publication number | Priority date | Publication date | Assignee | Title |
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Address after: 100000 Dongcheng District, Beijing, Qinglong Hutong 1, 1103 house of Ge Hua building. Applicant after: Video Link Power Information Technology Co., Ltd. Address before: 100000 Beijing Dongcheng District Qinglong Hutong 1 Song Hua Building A1103-1113 Applicant before: BEIJING VISIONVERA INTERNATIONAL INFORMATION TECHNOLOGY CO., LTD. |
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Application publication date: 20181009 |