Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific realApplying 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 be realized HD video real-time Transmission,Push numerous 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 serviceClear video conference, Intellectualized monitoring analysis, emergency command, digital broadcast television, delay TV, the Web-based instruction, shows video monitoringField live streaming, VOD program request, TV Mail, individual character records (PVR), Intranet (manages) channel by oneself, intelligent video Broadcast Control, information publicationAll be incorporated into a system platform etc. services such as tens of kinds of videos, voice, picture, text, communication, data, by TV orComputer realizes that high-definition quality video plays.
Embodiment in order to enable those skilled in the art to better understand the present invention is introduced to depending on networking below:
Depending on networking, applied portion of techniques is as described below:
Network technology (Network Technology)
Traditional ethernet (Ethernet) is improved depending on the network technology innovation networked, with potential huge on networkVideo flow.(Circuit is exchanged different from simple network packet packet switch (Packet Switching) or lattice networkSwitching), Streaming demand is met using Packet Switching depending on networking technology.Has grouping depending on networking technologyFlexible, the simple and low price of exchange, is provided simultaneously with the quality and safety assurance of circuit switching, it is virtually electric to realize the whole network switch typeThe seamless connection of road and data format.
Switching technology (Switching Technology)
Two advantages of asynchronous and packet switch that Ethernet is used depending on networking eliminate Ethernet under the premise of complete compatible and lackIt falls into, has the end-to-end seamless connection of the whole network, direct user terminal, directly carrying IP data packet.User data is in network-wide basisIt 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 be realized at present mutuallyThe whole network large-scale high-definition realtime video transmission that networking cannot achieve pushes numerous network 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 platformTransmission be built upon it is connection-oriented on the basis of, data-handling capacity is unrelated with flow, communication time, single network layer energyEnough transmitted comprising signaling and data.For voice and video business, handled depending on networking and unified video platform Streaming MediaComplexity 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 andUsing state-of-the-art real time operating system, the programme information in server instruction is mapped to specific hard drive space, mediaContent is no longer pass through server, and moment is directly delivered to user terminal, and user waits typical time less than 0.2 second.It optimizesSector distribution greatly reduces the mechanical movement of hard disc magnetic head tracking, and resource consumption only accounts for the 20% of the internet ad eundem IP, butThe concurrent flow greater than 3 times of traditional disk array is generated, overall efficiency promotes 10 times or more.
Network security technology (Network Security Technology)
Depending on the structural design networked by servicing independent licence system, equipment and the modes such as user data is completely isolated every timeThe network security problem that puzzlement internet has thoroughly been eradicated from structure, does not need antivirus applet, firewall generally, has prevented blackThe attack of visitor and virus, structural carefree secure network is provided for user.
It services innovative technology (Service Innovation Technology)
Business and transmission are fused together by unified video platform, whether single user, private user or a netThe 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 richThe multimedia video service of rich colorful various forms.Unified video platform is traditional to substitute with table schema using " menu type "Complicated applications programming, considerably less code, which can be used, can be realized complicated application, 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. classType, 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 machinesTop box, encoding board, memory etc.).Node server is connected with access switch, and access switch can be with multiple terminal phasesEven, and it can connect Ethernet.
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 serveDevice.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 endPoint, 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 serveDevice.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 areaThe 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 flatPlatform can form view 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: server depending on the equipment in networking, interchanger (including etherNet gateway), terminal (including various set-top boxes, encoding board, memory etc.).Depending on networking can be divided on the whole Metropolitan Area Network (MAN) (orNational net, World Wide Web etc.) and access net.
1.2 equipment for wherein accessing mesh portions can be mainly divided into 3 classes: node server, access switch (including etherNet gateway), terminal (including various set-top boxes, encoding board, memory etc.).
The specific hardware structure of each access network equipment are as follows:
Node server:
As shown in Fig. 2, mainly including Network Interface Module 201, switching engine module 202, CPU module 203, disk arrayModule 204；
Wherein, Network Interface Module 201, the Bao Jun that CPU module 203, disk array module 204 are come in enter switching engineModule 202；Switching engine module 202 look into the operation of address table 205 to the packet come in, 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 closeIt is full, then it abandons；All pack buffer queues of 202 poll of switching engine mould, are forwarded: 1) port if meeting the following conditionsIt is less than to send caching；2) the queue package counting facility is greater than zero.Disk array module 204 mainly realizes the control to hard disk, includingThe operation 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, mainly including Network Interface Module (downstream network interface module 301, uplink network interface module302), 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 mouldWhether 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,It then distributes corresponding flow identifier (stream-id), and enters switching engine module 303, otherwise abandon；Uplink network interface mouldThe 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 engineModule 303；Switching engine module 303 look into the operation of address table 306 to the packet come in, to obtain the navigation information of packet；If the packet into switching engine module 303 is that downstream network interface is gone toward uplink 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 packetNavigation 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:
If the queue is that downstream network interface is gone toward uplink 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 greater than zero；3) token that rate control module generates is obtained；
If the queue is not that downstream network interface is gone toward uplink network interface, meets the following conditions and is forwarded:1) it is less than to send caching for the port；2) the queue package counting facility is greater than zero.
Rate control module 208 is configured by CPU module 204, to all downlink networks in programmable intervalInterface generates token toward the pack buffer queue that uplink network interface is gone, to control the code rate 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, mainly including Network Interface Module (downstream network interface module 401, uplink network interface module402), switching engine module 403, CPU module 404, packet detection module 405, rate control module 408, address table 406, Bao HuanStorage 407 and MAC adding module 409, MAC removing module 410.
Wherein, the data packet that downstream network interface module 401 is come in enters packet detection module 405；Packet detection module 405 is examinedEthernet mac DA, ethernet mac SA, Ethernet length or frame type, the view networking mesh way address of measured data packetDA, whether meet the requirements depending on networking source address SA, depending on networking data Packet type and packet length, corresponding stream is distributed if meetingIdentifier (stream-id)；Then, MAC DA, MAC SA, length or frame type are subtracted by MAC removing module 410(2byte), and enter corresponding receive and cache, otherwise abandon；
Downstream network interface module 401 detects the transmission caching of the port, according to the view of packet networking mesh if there is Bao ZeAddress D A knows the ethernet mac DA of corresponding terminal, adds the ethernet mac DA of terminal, Ethernet assists the MAC for turning gatewaySA, Ethernet length or frame type, and send.
The function that Ethernet association turns other modules in gateway is similar with access switch.
Terminal:
It mainly include Network Interface Module, Service Processing Module and CPU module；For example, set-top box mainly connects including networkMouth mold block, video/audio encoding and decoding engine modules, CPU module；Encoding board mainly includes Network Interface Module, video encoding engineModule, CPU module；Memory mainly includes 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 mainly includes Network Interface Module, switching engine module and CPU module；Metropolitan area server mainly includesNetwork Interface Module, switching engine module and CPU module are constituted.
2, networking data package definition is regarded
2.1 access network data package definitions
Access net data packet mainly include following sections: destination address (DA), source address (SA), reserve bytes,payload(PDU)、CRC。
As shown in the table, the data packet for accessing net mainly includes following sections:
Wherein:
Destination address (DA) is made of 8 bytes (byte), and first character section indicates type (such as the various associations of data packetDiscuss 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 part payload has different length according to the type of different datagrams, is if it is various protocol packages64 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 calculation method follows 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 equipmentIt can all can exceed that 2 kinds between machine and node server, node switch and node switch, node switch and node serverConnection.But the metropolitan area net address of metropolitan area network equipment is uniquely, to close to accurately describe the connection between metropolitan area network equipmentSystem, introduces parameter in embodiments of the present invention: label, uniquely to describe a metropolitan area network equipment.
(Multi-Protocol Label Switch, multiprotocol label are handed over by the definition of label and MPLS in this specificationChange) label definition it is similar, it is assumed that between equipment A and equipment B there are two connection, then data packet from equipment A to equipment B justThere are 2 labels, data packet also there are 2 labels from equipment B to equipment A.Label is divided into label, outgoing label, it is assumed that data packet entersThe label (entering label) of equipment A is 0x0000, and the label (outgoing label) when this data packet leaves equipment A may reform into0x0001.The networking process 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 be all to be dominated by metropolitan area server, node switch, node server be all passively execute, this point withThe 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) mainly includes following sections:
| DA | SA | Reserved | Label | Payload | CRC |
That is destination address (DA), source address (SA), reserve bytes (Reserved), label, payload (PDU), CRC.ItsIn, 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 positionSet is between the reserve bytes and payload of data packet.
Based on the above-mentioned characteristic of view networking, one of the core concepts of the embodiments of the present invention is proposed, in the embodiment of the present inventionAndroid device carried out data transmission by multimedia server with depending on networked server, and coding pressure is carried out to audio, video dataContracting transmission, decoding play, and realize video calling.Wherein, Android device is carried out by ICP/IP protocol and multimedia serverConnection, multimedia server depending on networking protocol with depending on networked server by being attached；
Referring to Fig. 5, the step of showing a kind of video call method embodiment one based on Android device of the invention streamCheng Tu, this method are applied in view networking, and the embodiment of the present invention is illustrated from Android device side, and the method specifically can be withInclude the following steps:
Step 501, video source data and audio source data are acquired.
In the concrete realization, video source data and audio source data can be acquired by the camera in Android device.
Step 502, the video source data and audio source data are encoded, is respectively formed the first video frame and firstAudio frame.
In embodiments of the present invention, the video source data is compiled by H263 coding method or H264 coding methodCode forms the first video frame.
In the concrete realization, collected video source data is put into first and is sent in buffering queue, then in transmissionWhen slice is split plus sequence number to sps, pps of video source data, frame per second, code rate, code stream, to complete to videoThe coding of source data.
Collected audio-source data format is PCM format.After encoding to audio source data, AAC format is formedFirst audio frame.
To the process that video source data and audio source data are encoded, and to video source data and audio source data intoThe process of row compression.After the source data collected is carried out compressed encoding, then to be transmitted, data transmission bauds is fast, even ifIn the case where network signal is not strong or bandwidth traffic is weak, can also play out glibly.
Step 503, first video frame and first audio frame are converted into the first data packet.
Step 504, first data packet is sent to view networked server by multimedia server.
In a preferred example of an embodiment of the present invention, the step 504 can specifically include:
Sub-step 11, by TCP/IP (Transmission Control Protocol/Internet Protocol,Transmission control protocol/Internet Protocol also known as network communication protocol) first data packet is sent to the multimediaServer；
Sub-step 12, the multimedia server is by being sent to institute for received first data packet depending on networking protocolState view networked server.
It is a carrier for being different from internet depending on networking, the equipment (referred to as " Android device ") with Android system is generalBe carried out data transmission by internet, so Android device first have to will by ICP/IP protocol connect streaming media server,Then streaming media server by view networking protocol connection view networked server, realize Android device and view networked server itBetween data transmission, to carry out video calling (such as Web conference).
In the concrete realization, after receiving the first data packet depending on networked server, the first data packet can be sent to otherAndroid device or view networked terminals (such as open-minded, the boxes product such as sea think of) for video calling.Depending on networked server by firstThe method that data packet is sent to view networked terminals, can specifically include:
Step 21, described that first data packet that the multimedia server sends over is received depending on networked server；
Step 22, described that first data packet is converted into view networking data depending on networked server；
Step 23, described to play out described be sent to depending on networking data depending on networked terminals depending on networked server.
It should be noted that view networked terminals pass through view networking protocol connection view networked server.
Referring to Fig. 6, the step of showing a kind of video call method embodiment two based on Android device of the invention streamCheng Tu, this method can be applied in view networking.Method described in one through the foregoing embodiment, can be realized Android device will adoptThe source data coding compression collected, is sent to view networked server by multimedia server.The embodiment of the present invention two is from AndroidThe side of equipment is illustrated, and illustrates that the data received are sent to Android by multimedia server depending on networked serverThe method of equipment, this method can specifically include:
Step 601, the second data packet that the view networked server is sent is received by the multimedia server.
In a preferred example of an embodiment of the present invention, the step 601 can specifically include:
Sub-step 31, the multimedia server is by receiving the described of the view networked server transmission depending on networking protocolSecond data packet；
Sub-step 32 receives second data packet that the multimedia server is sent by ICP/IP protocol.
Step 602, second data packet is parsed, the second video frame and the second audio frame are generated.
Step 603, second video frame and second audio frame are decoded.
In a preferred example of an embodiment of the present invention, video frame and audio frame are solved using the method for hard decoderCode.The mode of hard decoder can reduce the occupancy of cpu, greatly improve the fluency of playing audio-video.
Step 604, second video frame after broadcast decoder and second audio frame.
In the concrete realization, the video frame and audio frame that will be generated after parsing, are put into video buffer queue and audio respectivelyIn buffering queue, video frame and audio frame then are read out from video buffer queue and Audio Buffer queue respectively, after decodingIt plays out.
It in the concrete realization, can be by being sent to Streaming Media clothes depending on networked server depending on the collected data of networked terminalsIt is engaged on device, the Android device for video calling is then sent to by streaming media server.
Android device includes the equipment that mobile phone, tablet computer etc. are equipped with Android system.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the methodIt closes, but those skilled in the art should understand that, embodiment of that present invention are not limited by the describe sequence of actions, because according toAccording to the embodiment of the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also shouldKnow, the embodiments described in the specification are all preferred embodiments, and the related movement not necessarily present invention is implementedNecessary to example.
Referring to Fig. 7, a kind of structural frames of video call system embodiment one based on Android device of the invention are shownFigure, the system are applied in view networking, comprising: Android device 1, multimedia server 2 and view networked server 3；The AndroidEquipment 1 connects the multimedia server 2 by ICP/IP protocol；The multimedia server 2 passes through view networking protocol connectionThe view networked server 3.
The Android device 1 includes:
Acquisition module 701, for acquiring video source data and audio source data.
Coding module 702 is respectively formed the first video for encoding to the video source data and audio source dataFrame and the first audio frame.
In embodiments of the present invention, the video source data is compiled by H263 coding method or H264 coding methodCode forms the first video frame.
Collected audio-source data format is PCM format.After encoding to audio source data, AAC format is formedFirst audio frame.
Conversion module 703, for first video frame and first audio frame to be converted to the first data packet；
First sending module 704, for first data packet to be sent to view the Internet services by multimedia serverDevice.
The multimedia server 2 includes:
Second receiving module, for receiving first data packet that the Android device is sent by ICP/IP protocol；
Second sending module, for being networked by the way that received first data packet is sent to the view depending on networking protocolServer.
Referring to Fig. 8, a kind of structural frames of video call system embodiment two based on Android device of the invention are shownFigure, the system are applied in view networking, comprising: Android device 1, multimedia server 2 and view networked server 3；The AndroidEquipment 1 connects the multimedia server 2 by ICP/IP protocol；The multimedia server 2 passes through view networking protocol connectionThe view networked server 3.
The Android device 1 further include:
First receiving module 801, for receiving that the view networked server is sent by the multimedia serverTwo data packets；
Parsing module 802 generates the second video frame and the second audio frame for parsing second data packet；
Decoder module 803, for being decoded to second video frame and second audio frame；
Playing module 804, for after broadcast decoder second video frame and second audio frame.
The multimedia server 2 further include:
Third receiving module, for by receiving second data that the view networked server is sent depending on networking protocolPacket；
Third sending module, for received second data packet to be sent to Android device by ICP/IP protocol.
In conclusion the characteristic of application view networking of the embodiment of the present invention, Android device are joined by multimedia server and viewNetwork server carries out data transmission, and realizes video calling, gets rid of the limitation in video calling place, user's operation is more convenient.
For device (system) embodiment, since it is basically similar to the method embodiment, so the comparison of description is simpleSingle, the relevent part can refer to the partial explaination of embodiments of method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are withThe difference of other embodiments, 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 provide as method, apparatus or calculateMachine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software andThe form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer canWith in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program codeThe form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer programThe 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 instructionsIn each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide theseComputer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminalsStandby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devicesCapable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagramThe device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devicesIn computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packetThe manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagramThe function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so thatSeries of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thusThe instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchartAnd/or in one or more blocks of the block diagram 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 basesThis creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted asIncluding 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 byOne entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operationBetween there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaningCovering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrapThose elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, articleOr the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limitedElement, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
Android device is based on to a kind of video call method based on Android device provided by the present invention and one kind aboveVideo call system, be described in detail, specific case used herein to the principle of the present invention and embodiment intoElaboration is gone, the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；Meanwhile for thisThe those skilled in the art in field, according to the thought of the present invention, there will be changes in the specific implementation manner and application range,In conclusion the contents of this specification are not to be construed as limiting the invention.