CN104270410A - Digital recording and processing device for mass data of audio and video - Google Patents

Digital recording and processing device for mass data of audio and video Download PDF

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Publication number
CN104270410A
CN104270410A CN201410451891.2A CN201410451891A CN104270410A CN 104270410 A CN104270410 A CN 104270410A CN 201410451891 A CN201410451891 A CN 201410451891A CN 104270410 A CN104270410 A CN 104270410A
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China
Prior art keywords
connects
resistance
electric capacity
circuit
ground connection
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CN201410451891.2A
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Chinese (zh)
Inventor
吴建军
张亮
刘嘉旭
赵会霞
刘辉
黎遗仕
廖雪玲
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CHONGQING HUILIAN INFORMATION TECHNOLOGY Co Ltd
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CHONGQING HUILIAN INFORMATION TECHNOLOGY Co Ltd
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Priority to CN201410451891.2A priority Critical patent/CN104270410A/en
Publication of CN104270410A publication Critical patent/CN104270410A/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/75—Media network packet handling
    • H04L65/764—Media network packet handling at the destination 
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6405—Multicasting
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The present invention discloses a digital recording and processing device for mass data of audio and video. The digital recording and processing device is characterized by including a multimedia processor, an analog front end circuit, a DDR memory, a power source, a power source protective circuit, a Beidou module, a 3G module, an audio and video input circuit and a communication circuit, wherein an output end of the power source is connected to an input end of the power source protective circuit, an output end of the power source protective circuit is connected to an input end of the multimedia processor, an information output end of the DDR memory is connected to an information input end of the multimedia processor, a signal output end of the Beidou module is connected to the input end of the multimedia processor, a signal input end of the audio and video input circuit is connected to a signal input end of the analog front end circuit, a signal output end of the analog front end circuit is connected to the input end of the multimedia processor, a signal output end of the 3G module is connected to the input end of the multimedia processor, and the communication circuit is connected to the input end of the multimedia processor.

Description

For the digital record processing unit of audio frequency and video mass data
Technical field
The present invention relates to field of electric control, particularly relate to a kind of digital record processing unit for audio frequency and video mass data.
Background technology
After the audio-visual data received being received in prior art, the audio-visual data received is carried out to the device of recording processing, the error rate is very high, and recorded data can not accurately be transferred to server, and in existing digital recorder, surge circuit in its circuit can only reach 50V-60V, the significantly situation of change of the voltage in real life can not be adapted to, in addition, the processor chips speed of existing digital recorder is too slow, can not parallel running multichannel audio-video frequency information; Meanwhile, existing digital recorder can not dock with carrier network, can not real-time Transmission audio, video data, so, need those skilled in the art badly and solve the problems of the technologies described above.
Summary of the invention
The present invention is intended at least solve the technical problem existed in prior art, especially innovatively proposes a kind of digital record processing unit of audio frequency and video mass data.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of digital record processing unit of audio frequency and video mass data, its key is, comprise: multimedia processor, analog front circuit, DDR internal memory, power supply, power protecting circuit, Big Dipper module, 3G module, audio frequency and video input circuit, telecommunication circuit;
Described power output end connects power protecting circuit input, described power protecting circuit output connects multimedia processor input, described DDR memory information output, connect multimedia processor information input terminal, described Big Dipper module by signal output connects multimedia processor input, described audio frequency and video input circuit signal input part connecting analog front-end circuit signal input part, described analog front circuit signal output part connects multimedia processor input, described 3G module by signal output connects multimedia processor input, described telecommunication circuit connects multimedia processor input.
The beneficial effect of technique scheme is: multimedia processor, analog front circuit, DDR internal memory, power supply, power protecting circuit, Big Dipper module, 3G module, audio frequency and video input circuit; the combination of telecommunication circuit; achieve the acquisition and recording of digital audio/video data, the compression of mass data is transmitted becomes possibility.
The described digital record processing unit for audio frequency and video mass data, preferably, described power protecting circuit comprises: external power source circuit, surge protection circuit, overvoltage crowbar;
Surge protection circuit output connects overvoltage crowbar input, and described overvoltage crowbar output connects main power circuit input, and described overvoltage crowbar output also connects external power source circuit input end.
The beneficial effect of technique scheme is: its perfect surge, over-voltage over-current protection, the highest withstand voltage 200V.
The described digital record processing unit for audio frequency and video mass data, preferably, described surge protection circuit comprises:
External power source connects the 1st resettable fuse; described 1st resettable fuse connects the 1st Transient Suppression Diode one end; the described 1st Transient Suppression Diode other end connects the 6th diode cathode and the 2nd Transient Suppression Diode one end respectively; described 6th diode cathode ground connection; described 2nd Transient Suppression Diode other end ground connection; described 2nd Transient Suppression Diode one end also connects the 8th inductance one end; the described 8th inductance other end connects the 159th electric capacity one end and overvoltage crowbar input respectively, the 159th electric capacity other end ground connection.
The beneficial effect of technique scheme is: surge protection circuit achieves surge protection.
The described digital record processing unit for audio frequency and video mass data, preferably, described overvoltage crowbar comprises:
21st resistance one end connects the 4th emitter, the described 21st resistance other end connects the 4th transistor base and the 40th resistance one end respectively, described 4th transistor collector connects the 4th diode cathode and the 156th electric capacity one end respectively, described 156th electric capacity one end also connects the 157th electric capacity one end, the described 156th electric capacity other end connects the 40th resistance, the described 157th electric capacity other end connects the 40th resistance one end and the 5th transistor collector respectively, described 5th emitter connects the 122nd resistance one end, described 122nd resistance other end ground connection, described 5th transistor base connects the 125th resistance one end and the 126th resistance one end respectively, the described 125th resistance other end connects the 122nd resistance one end, described 126 resistance other end ground connection, described 126th resistance one end also connects the 5th diode cathode, described 5th diode cathode connects the 14th emitter, described 14th emitter also connects the 15th footpath emitter, described 15th transistor collector connects the 4th diode cathode and the 14th transistor collector respectively, described 14th transistor base connects the 139th resistance one end, described 139th resistance other end ground connection.
The beneficial effect of technique scheme is: overvoltage crowbar realizes overvoltage protection, and its circuit connects unique, and cost is low, stable.
The described digital record processing unit for audio frequency and video mass data, preferably, described external power source circuit comprises:
The voltage input end of the 17th optocoupler step-down switch connects overvoltage crowbar output and the 311st electric capacity one end respectively, 311st electric capacity other end ground connection, the SW end of described 17th optocoupler step-down switch connects the 28th diode cathode and the 299th electric capacity one end respectively, 28th diode cathode ground connection, the BST that the 299th electric capacity other end connects described 17th optocoupler step-down switch respectively holds the 29th diode cathode, the SS of described 17th optocoupler step-down switch holds connection the 298th electric capacity one end, 298th electric capacity other end ground connection, described 299th electric capacity one end also connects the 11st inductance one end, the 11st inductance other end connects the 167th resistance one end, the 167th resistance other end connects the 160th resistance one end, 160th resistance other end ground connection, the FB end of described 17th optocoupler step-down switch connects the 161st resistance respectively, 162nd resistance and the 163rd resistance one end, described 161st resistance other end ground connection, the described 162nd resistance other end connects the 297th electric capacity one end, the described 297th electric capacity other end connects the 163rd resistance one end, the 163rd resistance other end connects the 161st resistance one end, described 297th electric capacity one end also connects voltage output end, described 167th resistance one end also connects the 245th electric capacity one end and the 30th diode cathode respectively, described 30th diode cathode connects the 7th Transient Suppression Diode one end, the 7th Transient Suppression Diode other end connects the 315th electric capacity, described 315th electric capacity other end ground connection, described 315th electric capacity one end also connects the 317th electric capacity one end, described 317th electric capacity other end ground connection, described 245th electric capacity one end also connects the 3rd Transient Suppression Diode, 4th Transient Suppression Diode, 5th Transient Suppression Diode and the 6th Transient Suppression Diode one end, described 3rd Transient Suppression Diode, 4th Transient Suppression Diode, 5th Transient Suppression Diode is connected load (J30) with the 6th Transient Suppression Diode other end, described 245th diode also connects the 314th electric capacity one end, described 314th electric capacity other end ground connection, described 314th electric capacity one end also connects the 15th Transient Suppression Diode respectively, 16th Transient Suppression Diode, 17th Transient Suppression Diode and the 18th Transient Suppression Diode one end, described 15th Transient Suppression Diode, 16th Transient Suppression Diode, 17th Transient Suppression Diode is connected voltage output end with the 18th Transient Suppression Diode other end.
The beneficial effect of technique scheme is: power circuit is used for carrying out stable Power supply to digital recorder.
The described digital record processing unit for audio frequency and video mass data, preferably, described analog front circuit comprises:
143rd electric capacity one end connects the 147th electric capacity one end, the described 143rd electric capacity other end connects 3.3V power supply and the 147th electric capacity other end, the described 147th electric capacity other end connects the 23rd optocoupler step-down switch voltage input end, described 23rd optocoupler step-down switch voltage output end connects the 144th electric capacity one end, 144th electric capacity other end ground connection, described 144th electric capacity one end also connects the 145th electric capacity one end, described 145th electric capacity other end ground connection, described 145th electric capacity one end also connects the 36th resettable fuse and the 146th electric capacity one end respectively, described 146th electric capacity other end ground connection, described 146th electric capacity one end also connects the 148th electric capacity one end, 148th electric capacity other end ground connection.
The beneficial effect of technique scheme is: analog front circuit carries out process in early stage to audio-visual data data, is then transferred to multimedia processor and carries out corresponding data processing.
The described digital record processing unit for audio frequency and video mass data, preferably, also comprises: reset circuit;
38th resistance one end connects the 49th resistance one end, the 49th resistance other end connects 3.3V voltage source, 38th resistance one end also connects reset chip voltage input end, reset chip resets end connection the 24th resistance and the 72nd resistance one end, the described 24th resistance other end connects the 187th electric capacity, the 187th electric capacity other end connects the 72nd resistance other end, the 72nd resistance other end ground connection.
The beneficial effect of technique scheme is: reset circuit is used for the work that digital recorder carries out restarting and resetting.
The described digital record processing unit for audio frequency and video mass data, preferably, described telecommunication circuit comprises:
CAN circuit voltage input connects 3.3V voltage source and the 86th electric capacity one end, the nINT of CAN circuit holds connection the 32nd resistance one end, the described 32nd resistance other end connects voltage source, the crystal oscillator input of described CAN circuit connects the 3rd crystal oscillator one end, the described 3rd crystal oscillator other end connects the crystal oscillator output of described CAN circuit, described 3rd crystal oscillator one end also connects the 87th electric capacity one end, and the 3rd crystal oscillator other end also connects the 88th electric capacity one end.
The beneficial effect of technique scheme is: described telecommunication circuit carries out the transmission work of data, and simplicity of design is reasonable.
The described digital record processing unit for audio frequency and video mass data, preferably, described telecommunication circuit comprises:
CAN circuit output end connects CAN drive circuit input, described CAN drive circuit high level end connects the 44th resistance one end, the 44th resistance other end connects the 1st magnetic bead inductance one end, the 1st magnetic bead inductance other end connects the 19th diode cathode, described 19th diode cathode ground connection, described CAN drive circuit low level end connects the 45th resistance one end, the 45th resistance other end connects the 2nd magnetic bead inductance one end, the 2nd magnetic bead inductance other end connects the 11st diode cathode, the 11st diode cathode ground connection.
The beneficial effect of technique scheme is: described telecommunication circuit carries out the transmission work of data, and simplicity of design is reasonable.
The described digital record processing unit for audio frequency and video mass data, preferably, described telecommunication circuit comprises:
The R0 of RS485 chip holds connection the 155th resistance one end, the 155th resistance other end connects CPU debugging and holds with the UART1_RXD of communication interface, the DE of described RS485 chip holds connection the 152nd resistance one end, the DI of described RS485 chip holds connection the 151st resistance one end, the B of described RS485 chip holds connection the 183rd resistance one end, the described 183rd resistance other end connects the 27th resistance one end, the described 27th resistance other end connects the 182nd resistance one end, the described 182nd resistance other end connects the A end of RS485, the described 183rd resistance other end connects the 37th diode cathode, described 37th diode cathode ground connection, 38 diode cathodes that the described 182nd resistance other end connects, described 38th diode cathode ground connection,
RS232 chip voltage input connects the 81st electric capacity one end, the 81st electric capacity other end connects the 80th electric capacity one end and the 82nd electric capacity one end, the described 80th electric capacity other end connects the positive polarity of RS232 chip, the described 81st electric capacity other end also connects the voltage negative pole of RS232 chip, the input of described RS232 chip connects CPU debugging and holds with the UART3_TXD of communication interface, the output of described RS232 chip connects the 36th diode cathode, described 36th diode cathode ground connection.
The beneficial effect of technique scheme is: the use of RS485 and RS232 chip circuit, achieves the stable of communication work.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
Its perfect surge circuit and over-voltage over-current protection circuit, the circuit of design is accurate, and cost control is reasonable, and can the highest withstand voltage more than 200V; Adopt the processor of H.246 high compression ratio compression, speed is run fast, and transcoding is accurate; Wherein, when there is calling data in Large Copacity DDR3, can keep reading data fast, adopt flush type LINUX system, protection system is not subject to virus, network attack; High speed 3G network, real-time video transmission, can not cause network congestion.The breakthrough of Big Dipper signal transceiver power, can have good transmitting-receiving when power is lower to information, greatly reducing the consumption to electric quantity of power supply.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the digital record processing unit flow chart of the present invention for audio frequency and video mass data;
Fig. 2 is that the present invention is for Data dissemination flow chart in the digital record processing unit of audio frequency and video mass data;
Fig. 3 is the digital record processing unit multicast flow chart of the present invention for audio frequency and video mass data;
Fig. 4 is the digital record processing unit use multicast schematic diagram of the present invention for audio frequency and video mass data;
Fig. 5 is the dissemination system schematic diagram of audio frequency and video mass data of the present invention in Distributor;
Fig. 6 is the digital record processing unit general illustration of the present invention for audio frequency and video mass data;
Fig. 7 is digital record processing unit surge protection circuit, the overvoltage crowbar schematic diagram of the present invention for audio frequency and video mass data;
Fig. 8 is the digital record processing unit optocoupler step-down switch circuit schematic diagram of the present invention for audio frequency and video mass data;
Fig. 9 is the digital record processing unit external power source circuit diagram of the present invention for audio frequency and video mass data;
Figure 10 is that the digital record processing unit main power source of the present invention for audio frequency and video mass data is for electrical schematic;
Figure 11 is the digital record processing unit 3G power circuit schematic diagram of the present invention for audio frequency and video mass data;
Figure 12 is the digital record processing unit analog front circuit schematic diagram of the present invention for audio frequency and video mass data;
Figure 13 is the digital record processing unit cpu power circuit diagram of the present invention for audio frequency and video mass data;
Figure 14 is the digital record processing unit reset circuit schematic diagram of the present invention for audio frequency and video mass data;
Figure 15 is the digital record processing unit CAN telecommunication circuit schematic diagram of the present invention for audio frequency and video mass data
To be the present invention debug and telecommunication circuit schematic diagram for the digital record processing unit CPU of audio frequency and video mass data Figure 16;
Figure 17 is the digital record processing unit CAN drive circuit schematic diagram of the present invention for audio frequency and video mass data;
Figure 18 is the digital record processing unit RS485 circuit diagram of the present invention for audio frequency and video mass data;
Figure 19 is the digital record processing unit RS232 circuit diagram of the present invention for audio frequency and video mass data;
Figure 20 is the digital record processing unit power protecting circuit schematic diagram of the present invention for audio frequency and video mass data.
Embodiment
For in the digital record processing unit of audio frequency and video mass data, the method that wherein distribution database carries out distributing is, as shown in Figure 1, step 1, after mass data is received, be transferred to data source server, described mass data is divided into N number of data file burst by described data source server, each data file burst in N number of data file burst is separate, each data file burst is carried out Data dissemination separately by described data source server, by the Data dissemination of each data file burst to destination node server, Data dissemination optimised service bandwidth in N number of data file burst is set during distribution,
Step 2, after Data dissemination optimised service bandwidth in N number of data file burst is set, described destination node server is divided into M data file fragmentation again for each data file burst in N number of data file burst, Data dissemination is carried out to being again divided into M data file fragmentation, be distributed to destination node child servers, until total data distribution is complete, described M, N are positive integer.
As shown in Figure 2, mass data distribution mechanisms of the present invention, in conjunction with the distributed flow media content delivering system of P2P technology and CDN technology, has better performance than homogeneous system.By improving the Data dissemination strategy of ServerCast, overcoming the impact of its performance by Internet network bandwidth fluctuation, Data dissemination performance can be improved further.
If first carry out coarseness segmentation before Data dissemination, when Data Segmentation granularity is suitable, can be similar to and thinks that, in the distribution procedure of this data fragmentation, the access bandwidth of CDN server and load are similar to constant.To the Data dissemination strategy that each cutting unit application ServerCast proposes, when all cutting units all complete distribution, whole file completes distribution, and data dissemination process terminates.
This improvement can adapt to the network bandwidth fluctuation of destination node on Internet effectively, and distributes to the distribution bandwidth of each destination node for not network state dynamic conditioning in the same time, thus improves the performance of Data dissemination.
The optimised service bandwidth of Data dissemination establishes B sfor the available bandwidth of data source server; B i(i=1,2...M) is the available bandwidth of M destination server; B i,j(i=1,2 ... M, j=1,2 ... M, i ≠ j) be that collaborative distribution phase is by S ito S jbe S during forwarding data jthe distribution bandwidth of distributing.
The research of ServerCast is verified, as data source server S stotal service bandwidth B swhen mutually providing the difference of the data retransmission total bandwidth of PSP data sharing service minimum with destination node, the highest Data dissemination performance can be obtained, corresponding to the minimized Data dissemination deadline.Based on this conclusion, can prove, data source server S sto destination node S kthe optimised service bandwidth of Data distributing is provided to be:
B s , k = B k M - 1 + 1 M × { B s - 1 M - 1 × Σ i = 1 M B i } - - - ( 1 ) .
The distribution of a large files is divided into the multiple mutual incoherent independent distribution procedure for different pieces of information burst by the collaborative mass data distribution mechanisms that the present invention proposes.Each distribution procedure independently performs Data dissemination decision-making, and process is as follows:
(1) data file F to be distributed is divided into N number of burst FD i(i=1,2..N).
(2) to each file fragmentation FD i(i=1,2..N) performs Data dissemination flow process below:
S1, data source server S swith destination node S ibetween exchange current available network bandwidth B swith B i(i=1,2..N), by data source server S scalculate this Data dissemination according to optimum distribution bandwidth allocation strategy (1) and distribute to each destination node S idistribution bandwidth B s,i.
S2, by data source server S iby the current file fragmentation FD that will distribute i(i=1,2..N) is divided into M burst further, is designated as FD i,j, represent file fragmentation FD ibe distributed to the secondary burst of destination node j, and its size meets following bounding algorithm:
| FD i , j | = | FD i | × B s , j B s - - - ( 2 )
Namely to be allocated to each destination node S jsecondary burst size be proportional to S sdistribute to S jdistribution bandwidth B s,jaccount for S ssuper-distribution bandwidth B sratio.The object being defined as follows constraint makes each destination node S jthe time receiving entire data is identical, to obtain the constraint of the shortest distribution time before meeting.
S3, by data source server S sby FD ibe allocated to each destination node S jsecondary
Burst FD i,j(i=1,2...N, j=1,2...M) is concurrently with the dispense rate B calculated in step sl s,jsend to destination node S j.
S4, as destination node S jstart from data source server S swhen receiving data, start the synergistic data distribution mechanisms between destination node, to other M-1 node in system with data rate forward oneself from data source server S sthe data received.Here B' kbe different from the B in the initial distribution stage (1) k, because from data source server S swith other destination nodes S jdata consumed certain bandwidth:
B k ′ = B k - B s , k - Σ i = 1 i ≠ k M B k ′ M - 1 - - - ( 3 )
(3) step (2) is again performed, until All Files burst FD idistribute complete.
As can be seen from description above, the algorithm that the present invention proposes is that magnanimity large files is divided into less data fragmentation in essence, then ServerCast algorithm is used to each data fragmentation, thus can when distributing different data fragmentations, the distribution bandwidth that data source server distributes to each destination node is dynamically adjusted for Internet flow load situation at that time, overcome the allocation strategy of the distribution bandwidth of the destination node calculated before ServerCast algorithm only uses distribution to start in whole file data distribution procedure and network bandwidth fluctuation situation that the different nodes that cannot adapt to Internet exist, can more effectively be applied in actual Internet environment.
On the basis of above technology, in order to the distribution efficiency between server and performance, the present invention uses multicasting technology to coordinate the solution of the ServerCast algorithm improved.Can see from Fig. 4 and the situation after using multicast reduce the load of server well.
Multicasting technology utilizes an IP address to make IP datagram literary composition be sent to user's group.IP multicast have employed specifically defined object IP address and target MAC (Media Access Control) address.IGMP group membership association protocol provides the mode adding and leave multicast group for client.CGMP makes router be switch configuration multicast forward table, and the multicast member of telling switch current.Designed router (dr) adopts dense mode DM or sparse mode SM multicast routing protocol to construct the distribution tree of multicast according to the distribution of the multicast member in network and the difference of use, and this distribution tree will determine between source subnet and multicast group that an exclusive path is to improve data transmission efficiency, the English full name of CGMP is Cisco Group Management Protocol, is the proprietary protocol that Cisco develops based on model of client/server.
1.ServerCast algorithm is used for Optimized Service bandwidth (Data dissemination)
2. multicasting technology solves a main frame sends method (Requests routing) from message to specific multiple recipient.
3. being combined both, can say that our server needs suitable the lacking of work done, substantially just play the effect that forwards intermediary or tissue, allow client oneself go to have processed all as far as possible the work of reality, network delay, loss of data etc. problem also solves thereupon.In multicast network, even if multicast user's quantity is doubled and redoubled, in backbone network, the network bandwidth is also without the need to increasing.Thus solve the requirement of current broadband application to bandwidth sum network service quality to greatest extent.
Distributor when dispense request, first Stochastic choice server.If the disposal ability of this server is saturated, then traversal server bitmap from the beginning to the end, until find a suitable server.Make the distribution of Distributor relatively more random like this, be conducive to the P2P transmission between server, meanwhile, distribution procedure is relatively simple, can not increase the weight of the computational load of server.
As shown in Figure 3,4, multicast program performs flow process description:
Definition socket the machine input structure body, multicast address structure, receiving multicast message array etc., after basic variable define, create the socket being used for UDP communication, judge whether socket creates successfully, successful then continue execution, otherwise quit a program; The address that will add multicast, the address information arranging group address, arrange the source master sending multicast message are then set; The machine is added multicast address, and namely the machine network interface card is as multicast member, only adds group and just can receive multicast message; Judge that the machine adds multicast address whether success, successful then continue execution, on the contrary quit a program; Calculate the size of the machine input structure body, and offer the internal memory of corresponding size for it, the machine communication connected mode UDP and port are set; Bind oneself port and IP information on socket; Judge whether binding success, successful then continue perform, otherwise quit a program; Empty the array of receiving multicast message; After above preparation is all carried out, so we just can circulate and receive the multicast message on network, if do not receive multicast message in the circulating cycle, complete, wherein UDP is towards disconnected agreement, it does not connect with the other side, but directly just Packet Generation is gone over.
IGMP agreement runs on main frame and between the multicast router be directly connected with main frame, main frame is told local router to wish to add by this agreement and is accepted the information of certain particular multicast group, whether the member that simultaneously router periodically inquires about certain known group in local area network (LAN) by this agreement is in active state (namely whether this network segment still has the member belonging to certain multicast group), realize the collection of the network group membership relation that networks and maintenance.
IGMP has three versions, and IGMPv1 is defined by RFC1112, and that general is IGMPv2 at present, is defined by RFC2236.IGMPv3 remains a draft at present.Define basic group membership's inquiry and reporting process in IGMPv1, IGMPv2 with the addition of the mechanism that group membership leaves fast on this basis, and the major function increased in IGMPv3 is that member can specify reception or specify the message not receiving some multicast source.Here the function of IGMPv2 agreement is highlighted.
IGMPv2 by requestor election mechanism by networking section elect unique requestor.Requestor periodically sends general group polling message and carries out member relation inquiry; Main frame sends report message and replys inquiry.When adding multicast group, main frame need not wait for query messages, initiatively sends report message.When leaving multicast group, main frame sends and leaves group message; Receive after leaving group message, requestor sends group-specific query message and determines whether that all group memberships leave.
By above-mentioned IGMP mechanism, in multicast router, set up list, each port wherein comprising router and the member which having organize on the subnet corresponding to port.After router receives data message of certain group, only to forwarding data packets on those ports having a member of G.How to forward between the routers as data message, determined by Routing Protocol, IGMP agreement is also not responsible.
As shown in Figure 5, for the digital record processing unit of audio frequency and video mass data, comprising: camera device 1, satellite system 2, digital collection recorder 3, receiving system, Distributor 6, processing server 8, terminal installation;
Described camera device 1 connects digital acquisition and recording instrument 3, for the audio-visual data of collection being transferred to digital collection recorder 3 by camera device 1;
Described satellite system 2 connects digital acquisition and recording instrument 3, and for audio-visual data is sent to satellite system 2, and the transfer of data that satellite system 2 sends is to digital collection recorder 3;
Described digital collection recorder 3 connects receiving system, and described receiving system is for the data of the data and satellite system 2 that receive digital collection recorder 3;
Described receiving system connects Distributor 6, described Distributor 6 connection handling server 8, audio-visual data for being received by receiving system is sent to processing server 8 by Distributor 6, and described processing server 8 pairs of audio-visual data process;
Described processing server 8 connects terminal installation, for the audio-visual data after process is sent to terminal installation, carries out application process and display operation by terminal installation to data.
For the digital record processing unit of audio frequency and video mass data, preferably, also comprise: fire compartment wall 5,
Described fire compartment wall 5 is connected between receiving system and Distributor, for tackling the malicious attack in audio-visual data.
For the digital record processing unit of audio frequency and video mass data, preferably, also comprise: SIP session initiation protocol service device 7;
Described SIP session initiation protocol service device is connected between fire compartment wall 5 and processing server 8, for processing audio-visual data, the free changing method of FreeSwitch transplanted by SIP session initiation protocol service device, the free changing method of FreeSwitch supports that the route of the agreement that audio frequency, video, text media data use is with mutual, the free changing method of FreeSwitch realizes audio frequency, video, text media data retransmission, makes the transmission completing audio frequency, video, text media data between participation session person.
For the digital record processing unit of audio frequency and video mass data, preferably, described receiving system comprises: satellite receiver 4 and 3G/4G network base station;
Described satellite receiver 4 connects satellite system 2, and for receiving the transmission data of satellite system 2, described 3G/4G network base station connects digital acquisition and recording instrument 3, for transmission of audio video data.
For the digital record processing unit of audio frequency and video mass data, preferably, described terminal installation comprises: application server 9, database server 10 and terminal browser 11;
Application server plays the effect that resident web applies, and application server provides the manageable access mechanism to system resource for web application,
Described application server 9 and database server 10 connection handling server 8 respectively, described application server 9 information output connects terminal browser 11, for the data after process are carried out display operation.
For the digital record processing unit of audio frequency and video mass data, preferably, described satellite system comprises: gps system and dipper system; Described gps system and dipper system are connected respectively to digital collection recorder 3 and satellite receiver 4, the audio-visual data of collection is sent to Distributor 6 by gps system and dipper system by described digital collection recorder 3, or the audio-visual data of collection is transferred to Distributor 6 by 3G/4G network base station, wherein dipper system transmitting-receiving time of the Big Dipper, longitude, latitude information, and the transmitting-receiving of short message or the transmission of confidential information.The realization of http protocol and database server connection management, Servlet container is only a part for application server.Except Servlet container, application server also may provide other Java EE (Enterprise Edition) assembly, as Enterprise Java Bean container, and JNDI server and JMS server etc.The application server that our company uses at present is the Tomcat of Apache.Here processing server, namely the server and the Requests routing server delivery mechanism that are exactly in fact processing terminal DVR and client browser requests reside in this.
As shown in Figure 6, for the digital record processing unit of audio frequency and video mass data, comprising: multimedia processor, analog front circuit, DDR internal memory, power supply, power protecting circuit, Big Dipper module, 3G module, audio frequency and video input circuit, telecommunication circuit;
Described power output end connects power protecting circuit input, described power protecting circuit output connects multimedia processor input, described DDR memory information output, connect multimedia processor information input terminal, described Big Dipper module by signal output connects multimedia processor input, described audio frequency and video input circuit signal input part connecting analog front-end circuit signal input part, described analog front circuit signal output part connects multimedia processor input, described 3G module by signal output connects multimedia processor input, described telecommunication circuit connects multimedia processor input.
The beneficial effect of technique scheme is: multimedia processor, analog front circuit, DDR internal memory, power supply, power protecting circuit, Big Dipper module, 3G module, audio frequency and video input circuit; the combination of telecommunication circuit; achieve the acquisition and recording of digital audio/video data, the compression of mass data is transmitted becomes possibility.
As shown in Figure 7, for the digital record processing unit of audio frequency and video mass data, preferably, described power protecting circuit comprises: external power source circuit, surge protection circuit, overvoltage crowbar;
Surge protection circuit output connects overvoltage crowbar input, and described overvoltage crowbar output connects main power circuit input, and described overvoltage crowbar output also connects external power source circuit input end.Beneficial effect is: its perfect surge, over-voltage over-current protection, the highest withstand voltage 200V.
The described digital record processing unit for audio frequency and video mass data, preferably, described surge protection circuit comprises:
External power source connects the 1st resettable fuse; described 1st resettable fuse connects the 1st Transient Suppression Diode one end; the described 1st Transient Suppression Diode other end connects the 6th diode cathode and the 2nd Transient Suppression Diode one end respectively; described 6th diode cathode ground connection; described 2nd Transient Suppression Diode other end ground connection; described 2nd Transient Suppression Diode one end also connects the 8th inductance one end; the described 8th inductance other end connects the 159th electric capacity one end and overvoltage crowbar input respectively, the 159th electric capacity other end ground connection.The beneficial effect of technique scheme is: surge protection circuit achieves surge protection.
The described digital record processing unit for audio frequency and video mass data, preferably, described overvoltage crowbar comprises:
21st resistance one end connects the 4th emitter, the described 21st resistance other end connects the 4th transistor base and the 40th resistance one end respectively, described 4th transistor collector connects the 4th diode cathode and the 156th electric capacity one end respectively, described 156th electric capacity one end also connects the 157th electric capacity one end, the described 156th electric capacity other end connects the 40th resistance, the described 157th electric capacity other end connects the 40th resistance one end and the 5th transistor collector respectively, described 5th emitter connects the 122nd resistance one end, described 122nd resistance other end ground connection, described 5th transistor base connects the 125th resistance one end and the 126th resistance one end respectively, the described 125th resistance other end connects the 122nd resistance one end, described 126 resistance other end ground connection, described 126th resistance one end also connects the 5th diode cathode, described 5th diode cathode connects the 14th emitter, described 14th emitter also connects the 15th footpath emitter, described 15th transistor collector connects the 4th diode cathode and the 14th transistor collector respectively, described 14th transistor base connects the 139th resistance one end, described 139th resistance other end ground connection.Beneficial effect is: overvoltage crowbar realizes overvoltage protection, and its circuit connects unique, and cost is low, stable.
As shown in Figure 9, for the digital record processing unit of audio frequency and video mass data, preferably, described external power source circuit comprises:
The voltage input end of the 17th optocoupler step-down switch connects overvoltage crowbar output and the 311st electric capacity one end respectively, 311st electric capacity other end ground connection, the SW end of described 17th optocoupler step-down switch connects the 28th diode cathode and the 299th electric capacity one end respectively, 28th diode cathode ground connection, the BST that the 299th electric capacity other end connects described 17th optocoupler step-down switch respectively holds the 29th diode cathode, the SS of described 17th optocoupler step-down switch holds connection the 298th electric capacity one end, 298th electric capacity other end ground connection, described 299th electric capacity one end also connects the 11st inductance one end, the 11st inductance other end connects the 167th resistance one end, the 167th resistance other end connects the 160th resistance one end, 160th resistance other end ground connection, the FB end of described 17th optocoupler step-down switch connects the 161st resistance respectively, 162nd resistance and the 163rd resistance one end, described 161st resistance other end ground connection, the described 162nd resistance other end connects the 297th electric capacity one end, the described 297th electric capacity other end connects the 163rd resistance one end, the 163rd resistance other end connects the 161st resistance one end, described 297th electric capacity one end also connects voltage output end, described 167th resistance one end also connects the 245th electric capacity one end and the 30th diode cathode respectively, described 30th diode cathode connects the 7th Transient Suppression Diode one end, the 7th Transient Suppression Diode other end connects the 315th electric capacity, described 315th electric capacity other end ground connection, described 315th electric capacity one end also connects the 317th electric capacity one end, described 317th electric capacity other end ground connection, described 245th electric capacity one end also connects the 3rd Transient Suppression Diode, 4th Transient Suppression Diode, 5th Transient Suppression Diode and the 6th Transient Suppression Diode one end, described 3rd Transient Suppression Diode, 4th Transient Suppression Diode, 5th Transient Suppression Diode is connected load (J30) with the 6th Transient Suppression Diode other end, described 245th diode also connects the 314th electric capacity one end, described 314th electric capacity other end ground connection, described 314th electric capacity one end also connects the 15th Transient Suppression Diode respectively, 16th Transient Suppression Diode, 17th Transient Suppression Diode and the 18th Transient Suppression Diode one end, described 15th Transient Suppression Diode, 16th Transient Suppression Diode, 17th Transient Suppression Diode is connected voltage output end with the 18th Transient Suppression Diode other end.The beneficial effect of technique scheme is: power circuit is used for carrying out stable Power supply to digital recorder.
As shown in figure 12, for the digital record processing unit of audio frequency and video mass data, preferably, described analog front circuit comprises:
143rd electric capacity one end connects the 147th electric capacity one end, the described 143rd electric capacity other end connects 3.3V power supply and the 147th electric capacity other end, the described 147th electric capacity other end connects the 23rd optocoupler step-down switch voltage input end, described 23rd optocoupler step-down switch voltage output end connects the 144th electric capacity one end, 144th electric capacity other end ground connection, described 144th electric capacity one end also connects the 145th electric capacity one end, described 145th electric capacity other end ground connection, described 145th electric capacity one end also connects the 36th resettable fuse and the 146th electric capacity one end respectively, described 146th electric capacity other end ground connection, described 146th electric capacity one end also connects the 148th electric capacity one end, 148th electric capacity other end ground connection.
As shown in figure 14, for the digital record processing unit of audio frequency and video mass data, preferably, also comprise: reset circuit;
38th resistance one end connects the 49th resistance one end, the 49th resistance other end connects 3.3V voltage source, 38th resistance one end also connects reset chip voltage input end, reset chip resets end connection the 24th resistance and the 72nd resistance one end, the described 24th resistance other end connects the 187th electric capacity, the 187th electric capacity other end connects the 72nd resistance other end, the 72nd resistance other end ground connection.The beneficial effect of technique scheme is: reset circuit is used for the work that digital recorder carries out restarting and resetting.
As shown in figure 15, for the digital record processing unit of audio frequency and video mass data, preferably, described telecommunication circuit comprises:
CAN circuit voltage input connects 3.3V voltage source and the 86th electric capacity one end, the nINT of CAN circuit holds connection the 32nd resistance one end, the described 32nd resistance other end connects voltage source, the crystal oscillator input of described CAN circuit connects the 3rd crystal oscillator one end, the described 3rd crystal oscillator other end connects the crystal oscillator output of described CAN circuit, described 3rd crystal oscillator one end also connects the 87th electric capacity one end, and the 3rd crystal oscillator other end also connects the 88th electric capacity one end.The beneficial effect of technique scheme is: described telecommunication circuit carries out the transmission work of data, and simplicity of design is reasonable.
As shown in figure 17, for the digital record processing unit of audio frequency and video mass data, preferably, described telecommunication circuit comprises:
CAN circuit output end connects CAN drive circuit input, described CAN drive circuit high level end connects the 44th resistance one end, the 44th resistance other end connects the 1st magnetic bead inductance one end, the 1st magnetic bead inductance other end connects the 19th diode cathode, described 19th diode cathode ground connection, described CAN drive circuit low level end connects the 45th resistance one end, the 45th resistance other end connects the 2nd magnetic bead inductance one end, the 2nd magnetic bead inductance other end connects the 11st diode cathode, the 11st diode cathode ground connection.The beneficial effect of technique scheme is: described telecommunication circuit carries out the transmission work of data, and simplicity of design is reasonable.
As shown in figure 18, for the digital record processing unit of audio frequency and video mass data, preferably, described telecommunication circuit comprises:
The R0 of RS485 chip holds connection the 155th resistance one end, the 155th resistance other end connects CPU debugging and holds with the UART1_RXD of communication interface, the DE of described RS485 chip holds connection the 152nd resistance one end, the DI of described RS485 chip holds connection the 151st resistance one end, the B of described RS485 chip holds connection the 183rd resistance one end, the described 183rd resistance other end connects the 27th resistance one end, the described 27th resistance other end connects the 182nd resistance one end, the described 182nd resistance other end connects the A end of RS485, the described 183rd resistance other end connects the 37th diode cathode, described 37th diode cathode ground connection, 38 diode cathodes that the described 182nd resistance other end connects, described 38th diode cathode ground connection,
As shown in figure 19, RS232 chip voltage input connects the 81st electric capacity one end, the 81st electric capacity other end connects the 80th electric capacity one end and the 82nd electric capacity one end, the described 80th electric capacity other end connects the positive polarity of RS232 chip, the described 81st electric capacity other end also connects the voltage negative pole of RS232 chip, the input of described RS232 chip connects CPU debugging and holds with the UART3_TXD of communication interface, and the output of described RS232 chip connects the 36th diode cathode, described 36th diode cathode ground connection.
The beneficial effect of technique scheme is: the use of RS485 and RS232 chip circuit, achieves the stable of communication work.
As shown in Figure 8, optocoupler step-down switch U16 voltage input end connects overvoltage crowbar output, optocoupler step-down switch U16 Enable Pin connects the 310th electric capacity and external power source circuit input end respectively, the SW of described optocoupler step-down switch U16 holds connection the 9th diode cathode, 9th diode cathode ground connection, described 9th diode cathode also connects the 239th electric capacity one end, the 239th electric capacity other end connects BST end and the 31st diode cathode of optocoupler step-down switch U16 respectively, 31st diode cathode connects the 10th inductance one end, the 10th inductance other end connects the 239th electric capacity one end, described 10th inductance one end also connects the 140th resistance one end, the described 140th resistance other end connects the VO end of optocoupler step-down switch U16, the described 140th resistance other end also connects the 143rd resistance one end, described 143rd resistance other end ground connection, described 10th inductance one end also connect the 244th electric capacity one end and 153 resistance one end, the described 244th electric capacity other end connects the 154th resistance one end, the described 154th resistance other end connects the 144th resistance one end, 144th resistance other end ground connection, described 144th resistance one end also connects the FB end of optocoupler step-down switch U16, 240 electric capacity one end that described 10th inductance one end also connects, 240th electric capacity other end ground connection, described 240th electric capacity one end also connects the 308th electric capacity one end, 308th electric capacity other end ground connection, described 308th electric capacity one end connects the 312nd electric capacity one end, described 312nd electric capacity other end ground connection, described 312nd electric capacity one end also connects the 10th diode cathode, 10th diode cathode connects the 25th diode cathode, 25th diode cathode also connects the 243rd electric capacity one end and the 313rd electric capacity one end respectively, the 243rd electric capacity other end and the 313rd electric capacity other end ground connection respectively.
As shown in Figure 10, when main power source is powered, the circuit adopted is that the 325th electric capacity one end connects the 328th electric capacity one end, 325th electric capacity other end ground connection, described 328th electric capacity other end ground connection, described 328th electric capacity one end also connects optocoupler step-down switch U18 input, the BST of described optocoupler step-down switch U18 holds connection the 326th electric capacity one end, the described 326th electric capacity other end connects SW end and the 13rd inductance one end of optocoupler step-down switch U18 respectively, the 13rd inductance other end connects the 23rd resistance one end, the FB of described optocoupler step-down switch U18 holds connection the 207th resistance one end, the 207th resistance other end connects the 23rd resistance other end and the 48th resistance one end respectively, described 48th resistance other end ground connection, the 13 described inductance other ends connect the 49th resettable fuse (TP49), described 32nd electric capacity, 261st electric capacity is connected 3.3V out-put supply with one end after the 191st Capacitance parallel connection, other end ground connection.
As shown in figure 11, when 3G power supply is powered, the circuit adopted is that the 331st electric capacity one end connects the 333rd electric capacity one end, 331st electric capacity other end ground connection, described 333rd electric capacity other end ground connection, described 333rd electric capacity one end also connects optocoupler step-down switch U21 input, the BST of described optocoupler step-down switch U21 holds connection the 332nd electric capacity one end, the described 332nd electric capacity other end connects SW end and the 15th inductance one end of optocoupler step-down switch U21 respectively, the 15th inductance other end connects the 26th resistance one end, the FB of described optocoupler step-down switch U21 holds connection the 209th resistance one end, the 209th resistance other end connects the 26th resistance other end and the 55th resistance one end respectively, described 55th resistance other end ground connection, the 15 described inductance other ends connect the 51st resettable fuse (TP51), described 33rd electric capacity, 262nd electric capacity is connected the 3G out-put supply of 3.3V with one end after the 193rd Capacitance parallel connection, other end ground connection.
As shown in figure 13, cpu power circuit adopts HI3520D chip, 164th electric capacity is connected the AVDD33_PLL end of cpu power circuit with one end after the 47th Capacitance parallel connection, other end connecting circuit LB10 the 2nd end, described LB10 the 1st end connects 3.3VSoC, 163rd electric capacity is connected the AVDD12_PLL end of cpu power circuit with one end after the 46th Capacitance parallel connection, other end connecting circuit LB11 the 2nd end, described LB11 circuit the 1st end connects 1.25VSoC.
As shown in figure 16, 180th electric capacity one end connects the 2nd crystal oscillator one end, described 180th electric capacity other end ground connection, described 179th electric capacity one end connects the 2nd crystal oscillator other end, 179th electric capacity other end ground connection, described 2nd crystal oscillator one end also connects the 36th resistance one end, the 2nd crystal oscillator other end also connects the 186th resistance one end, the 186th resistance other end connects the 36th resistance other end, described 36th resistance one end also connects the X input of CPU communication and debugging interface, the described 36th resistance other end also connects the X output of CPU communication and debugging interface, 152nd electric capacity one end connects the calibration input of CPU communication and debugging interface, described 152nd electric capacity other end ground connection, described 152nd one end also connects the 1st crystal oscillator one end, the 1st crystal oscillator other end connects the 153rd electric capacity one end, 153rd electric capacity other end ground connection, described 153rd electric capacity one end also connects the calibration output of CPU communication and debugging interface.
1, power unit, due to vehicle power complex; devise surge circuit respectively, overvoltage protection, overcurrent protection; the highest withstand voltage 200V of power unit; 2, processor part, adopts ARM Cortex A9 processor; H.264Baseline/Main/High Profile Level4.2 codec; 128MB DDR3 internal memory, SATA hard disc interface, is used for the analog video on compression 4 tunnel and storage.3, analog video revolution word processor part, adopt the video AD C that NVP1918 is up-to-date, real-time 4 road videos, 4 road audio frequency, are converted to digital signal transfers and compress to processor.4,3G network part, adopt the WCDMA of general PCIE interface, CDMA2000, TDSWCDMA, wireless module, is connected with processor by USB interface.5, the Big Dipper/gps part adopts the Big Dipper, GPS, and two-in-one module, is connected 6 by serial ports with processor, input/output section, by being connected with processor after Phototube Coupling.
Power protecting circuit also comprises stand-by power supply charging module and preferably uses SX5202, and the 5V out-put supply module of stand-by power supply is preferably TRI1461GB05.External power module preferably adopts MP24943.
DDR3 internal memory is preferably MT41J64M16LA-15E, SPI program storage is preferably MX25L12835F, system reset circuit preferably adopts ADM809, RS485 bus is preferably MAX3485E, RS232 bus is preferably SP3232E, the preferred HI3520D of CPU AFE (analog front end) input interface, 3G module is preferably MC2716, CAN is preferably MCP2515, CAN drives and is preferably SN65HVD230, and SIM card interface is preferably 254020MA006S500ZL, and GPS module is preferably gps1216, reset circuit is ADM809, and multimedia processor interface chip is HI3520D; Warning circuit is preferably FDS9958, ULN2003A chip composition.
As shown in figure 20, described power protecting circuit also comprises: power charging circuit and stand-by power supply circuit, described power charging circuit output connects stand-by power supply circuit input end, described power charging circuit comprises: integrated circuit J31 connects resettable fuse TP46, the described resettable fuse TP46 other end connects the 169th resistance one end, described 169th resistance one end also connects optocoupler step-down switch U11 input, described optocoupler step-down switch U11 input also connects the 323rd electric capacity one end, described 323rd electric capacity other end ground connection, described optocoupler step-down switch U11BST holds connection the 320th electric capacity one end, the described 320th electric capacity other end connects SW end and the 12nd inductance one end of optocoupler step-down switch U11 respectively, the described 12nd inductance other end connects resettable fuse TP4, the described 12nd inductance other end also connects the 203rd resistance one end, the described 203rd resistance other end connects the 202nd resistance one end and the 204th resistance one end respectively, described 202nd resistance other end ground connection, the described 204th resistance other end connects the FB end of optocoupler step-down switch U11, described resettable fuse TP4 also connects the 321st electric capacity and the 322nd electric capacity one end, described 321st electric capacity and the 322nd electric capacity other end ground connection,
The described 169th resistance other end connects the 9th inductance one end and the 318th electric capacity one end respectively, described 318th electric capacity other end ground connection, the described 9th inductance other end connects SW end and the 8th diode cathode of charging chip SX5202 respectively, described 8th diode cathode ground connection, the FB of described charging chip SX5202 holds connection the 319th electric capacity, the TS of described charging chip SX5202 holds connection the 168th resistance one end, described 168th resistance other end ground connection.
Advantage, 1, perfect surge, over-voltage over-current protection, the highest withstand voltage 200V; 2, H.246 high compression ratio compression.3, Large Copacity DDR3 internal memories.4, flush type LINUX system, protection system is not subject to virus, network attack.5, high speed 3G network, real-time video transmission.Big Dipper module, 3G module, be all by existing chip carry out identification input;
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.

Claims (10)

1. the digital record processing unit for audio frequency and video mass data, it is characterized in that, comprise: multimedia processor, analog front circuit, DDR internal memory, power supply, power protecting circuit, Big Dipper module, 3G module, audio frequency and video input circuit, telecommunication circuit;
Described power output end connects power protecting circuit input, described power protecting circuit output connects multimedia processor input, described DDR memory information output, connect multimedia processor information input terminal, described Big Dipper module by signal output connects multimedia processor input, described audio frequency and video input circuit signal input part connecting analog front-end circuit signal input part, described analog front circuit signal output part connects multimedia processor input, described 3G module by signal output connects multimedia processor input, described telecommunication circuit connects multimedia processor input.
2. the digital record processing unit for audio frequency and video mass data according to claim 1, it is characterized in that, described power protecting circuit comprises: external power source circuit, surge protection circuit, overvoltage crowbar;
Surge protection circuit output connects overvoltage crowbar input, and described overvoltage crowbar output connects main power circuit input, and described overvoltage crowbar output also connects external power source circuit input end.
3. the digital record processing unit for audio frequency and video mass data according to claim 2, it is characterized in that, described surge protection circuit comprises:
External power source connects the 1st resettable fuse; described 1st resettable fuse connects the 1st Transient Suppression Diode one end; the described 1st Transient Suppression Diode other end connects the 6th diode cathode and the 2nd Transient Suppression Diode one end respectively; described 6th diode cathode ground connection; described 2nd Transient Suppression Diode other end ground connection; described 2nd Transient Suppression Diode one end also connects the 8th inductance one end; the described 8th inductance other end connects the 159th electric capacity one end and overvoltage crowbar input respectively, the 159th electric capacity other end ground connection.
4. the digital record processing unit for audio frequency and video mass data according to claim 2, it is characterized in that, described overvoltage crowbar comprises:
21st resistance one end connects the 4th emitter, the described 21st resistance other end connects the 4th transistor base and the 40th resistance one end respectively, described 4th transistor collector connects the 4th diode cathode and the 156th electric capacity one end respectively, described 156th electric capacity one end also connects the 157th electric capacity one end, the described 156th electric capacity other end connects the 40th resistance, the described 157th electric capacity other end connects the 40th resistance one end and the 5th transistor collector respectively, described 5th emitter connects the 122nd resistance one end, described 122nd resistance other end ground connection, described 5th transistor base connects the 125th resistance one end and the 126th resistance one end respectively, the described 125th resistance other end connects the 122nd resistance one end, described 126 resistance other end ground connection, described 126th resistance one end also connects the 5th diode cathode, described 5th diode cathode connects the 14th emitter, described 14th emitter also connects the 15th footpath emitter, described 15th transistor collector connects the 4th diode cathode and the 14th transistor collector respectively, described 14th transistor base connects the 139th resistance one end, described 139th resistance other end ground connection.
5. the digital record processing unit for audio frequency and video mass data according to claim 2, is characterized in that, described external power source circuit comprises:
The voltage input end of the 17th optocoupler step-down switch connects overvoltage crowbar output and the 311st electric capacity one end respectively, 311st electric capacity other end ground connection, the SW end of described 17th optocoupler step-down switch connects the 28th diode cathode and the 299th electric capacity one end respectively, 28th diode cathode ground connection, the BST that the 299th electric capacity other end connects described 17th optocoupler step-down switch respectively holds the 29th diode cathode, the SS of described 17th optocoupler step-down switch holds connection the 298th electric capacity one end, 298th electric capacity other end ground connection, described 299th electric capacity one end also connects the 11st inductance one end, the 11st inductance other end connects the 167th resistance one end, the 167th resistance other end connects the 160th resistance one end, 160th resistance other end ground connection, the FB end of described 17th optocoupler step-down switch connects the 161st resistance respectively, 162nd resistance and the 163rd resistance one end, described 161st resistance other end ground connection, the described 162nd resistance other end connects the 297th electric capacity one end, the described 297th electric capacity other end connects the 163rd resistance one end, the 163rd resistance other end connects the 161st resistance one end, described 297th electric capacity one end also connects voltage output end, described 167th resistance one end also connects the 245th electric capacity one end and the 30th diode cathode respectively, described 30th diode cathode connects the 7th Transient Suppression Diode one end, the 7th Transient Suppression Diode other end connects the 315th electric capacity, described 315th electric capacity other end ground connection, described 315th electric capacity one end also connects the 317th electric capacity one end, described 317th electric capacity other end ground connection, described 245th electric capacity one end also connects the 3rd Transient Suppression Diode, 4th Transient Suppression Diode, 5th Transient Suppression Diode and the 6th Transient Suppression Diode one end, described 3rd Transient Suppression Diode, 4th Transient Suppression Diode, 5th Transient Suppression Diode is connected load (J30) with the 6th Transient Suppression Diode other end, described 245th diode also connects the 314th electric capacity one end, described 314th electric capacity other end ground connection, described 314th electric capacity one end also connects the 15th Transient Suppression Diode respectively, 16th Transient Suppression Diode, 17th Transient Suppression Diode and the 18th Transient Suppression Diode one end, described 15th Transient Suppression Diode, 16th Transient Suppression Diode, 17th Transient Suppression Diode is connected voltage output end with the 18th Transient Suppression Diode other end.
6. the digital record processing unit for audio frequency and video mass data according to claim 1, it is characterized in that, described analog front circuit comprises:
143rd electric capacity one end connects the 147th electric capacity one end, the described 143rd electric capacity other end connects 3.3V power supply and the 147th electric capacity other end, the described 147th electric capacity other end connects the 23rd optocoupler step-down switch voltage input end, described 23rd optocoupler step-down switch voltage output end connects the 144th electric capacity one end, 144th electric capacity other end ground connection, described 144th electric capacity one end also connects the 145th electric capacity one end, described 145th electric capacity other end ground connection, described 145th electric capacity one end also connects the 36th resettable fuse and the 146th electric capacity one end respectively, described 146th electric capacity other end ground connection, described 146th electric capacity one end also connects the 148th electric capacity one end, 148th electric capacity other end ground connection.
7. the digital record processing unit for audio frequency and video mass data according to claim 1, is characterized in that, also comprise: reset circuit;
38th resistance one end connects the 49th resistance one end, the 49th resistance other end connects 3.3V voltage source, 38th resistance one end also connects reset chip voltage input end, reset chip resets end connection the 24th resistance and the 72nd resistance one end, the described 24th resistance other end connects the 187th electric capacity, the 187th electric capacity other end connects the 72nd resistance other end, the 72nd resistance other end ground connection.
8. the digital record processing unit for audio frequency and video mass data according to claim 1, it is characterized in that, described telecommunication circuit comprises:
CAN circuit voltage input connects 3.3V voltage source and the 86th electric capacity one end, the nINT of CAN circuit holds connection the 32nd resistance one end, the described 32nd resistance other end connects voltage source, the crystal oscillator input of described CAN circuit connects the 3rd crystal oscillator one end, the described 3rd crystal oscillator other end connects the crystal oscillator output of described CAN circuit, described 3rd crystal oscillator one end also connects the 87th electric capacity one end, and the 3rd crystal oscillator other end also connects the 88th electric capacity one end.
9. the digital record processing unit for audio frequency and video mass data according to claim 8, it is characterized in that, described telecommunication circuit comprises:
CAN circuit output end connects CAN drive circuit input, described CAN drive circuit high level end connects the 44th resistance one end, the 44th resistance other end connects the 1st magnetic bead inductance one end, the 1st magnetic bead inductance other end connects the 19th diode cathode, described 19th diode cathode ground connection, described CAN drive circuit low level end connects the 45th resistance one end, the 45th resistance other end connects the 2nd magnetic bead inductance one end, the 2nd magnetic bead inductance other end connects the 11st diode cathode, the 11st diode cathode ground connection.
10. the digital record processing unit for audio frequency and video mass data according to claim 8, it is characterized in that, described telecommunication circuit comprises:
The R0 of RS485 chip holds connection the 155th resistance one end, the 155th resistance other end connects CPU debugging and holds with the UART1_RXD of communication interface, the DE of described RS485 chip holds connection the 152nd resistance one end, the DI of described RS485 chip holds connection the 151st resistance one end, the B of described RS485 chip holds connection the 183rd resistance one end, the described 183rd resistance other end connects the 27th resistance one end, the described 27th resistance other end connects the 182nd resistance one end, the described 182nd resistance other end connects the A end of RS485, the described 183rd resistance other end connects the 37th diode cathode, described 37th diode cathode ground connection, 38 diode cathodes that the described 182nd resistance other end connects, described 38th diode cathode ground connection,
RS232 chip voltage input connects the 81st electric capacity one end, the 81st electric capacity other end connects the 80th electric capacity one end and the 82nd electric capacity one end, the described 80th electric capacity other end connects the positive polarity of RS232 chip, the described 81st electric capacity other end also connects the voltage negative pole of RS232 chip, the input of described RS232 chip connects CPU debugging and holds with the UART3_TXD of communication interface, the output of described RS232 chip connects the 36th diode cathode, described 36th diode cathode ground connection.
CN201410451891.2A 2014-09-05 2014-09-05 Digital recording and processing device for mass data of audio and video Pending CN104270410A (en)

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