CN1889410A - Coding terminal, decoding terminal and coding and decoding terminal based on IP network - Google Patents
Coding terminal, decoding terminal and coding and decoding terminal based on IP network Download PDFInfo
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Abstract
A coding terminal based on the IP network includes a coding unit, a processor and an interface connected with an exterior IP network, in which, the processor includes a storage process unit used in storing data after being compressed and coded by the coding unit into a sub-system of the IP network, a decoding unit based on the IP network includes a decoding unit, a processor and an interface connected with an exterior IP interface, the processor also includes a reading process unit for reading out data from the stored sub-system and processing them to compressed data treated by the decoding unit, which realizes the centralized storage and management to audio and video data by a monitor system since the coding terminal stores audio and video data in a sub-system of the IP network and the decoding terminal reads the data from the sub-system. This invention also provides an EPON port.
Description
Technical field
The present invention relates to network field, relate in particular to a kind of encoding terminal, decoding terminal and encoding and decoding terminal of IP based network.
Background technology
Universal day by day along with network application, utilizing network to monitor becomes the gesture of driving of development.With the audio-video monitoring is example, and the user can realize high-performance, the simple and direct video monitoring of configuration in the present networks environment.See also Fig. 1, it is a kind of structural representation of existing audio/video monitor and control system.The audio, video data that it comprises signal picker 11, be used for collecting carries out digitized coding subsystem 12, be used for digital signal convert to analog signal decoding subsystem 13, be used to store the memory device 15 of data, the playback subsystem 16 that is used for the real-time Monitor And Control Subsystem 14 of real-time playing audio-video data and is used for the playback audio, video data.Audio-video signals such as signal picker 11 images acquired, picture, sound, as video camera, the shooting first-class.
Existing audio/video monitor and control system commonly used mainly contains two kinds: a kind of digital monitor system, another kind that is based on PC is the embedded digital supervisory control system.
Digital monitor system based on PC (personal computer) is finished by a PC usually, and the function that coding subsystem 12 is conciliate numeral system 13 is to finish by a video card or by the software that is installed in PC.Video data behind the coding is stored in the hard disk of PC.In addition, can adopt computer networking technology, this PC be communicated by Ethernet card and long-range management equipment, so that on PC, finish functions such as supervision, video recording, playback, backup, warning, control.
There is following defective in above-mentioned supervisory control system: when (1) is used for non-stop run owing to PC, and the performance less stable.Problems such as deadlock appear in the operating system of PC easily in long-term use on the one hand; Because system file, application software and audio, video data etc. all are stored on the hard disk, and hard disk will carry out extensive work simultaneously, and common hard disk logic is easy to generate instability, problems such as deadlock appear on the other hand.(2) with stored video data in the built-in hard disk of PC, because hard-disk capacity is limited, the remaining time of data is short, is difficult to support the image of high definition; Because each control point data are disperseed storage, can't build large-scale supervisory control system simultaneously.(3) PC communicates by Ethernet card, and transmission is subjected to the propagation distance restriction, and whole system can not be laid on a large scale.
The embedded digital supervisory control system is the dedicated computer system that is used for audio-video monitoring, and it mainly is made up of flush bonding processor, codec chip, embedded OS and application software etc.The encoding and decoding of audio, video data are finished by codec chip, and the audio, video data behind the coding is stored in the built-in hard disk.Though owing to system is that dedicated system brings that instruction is simplified, advantage that processing speed is fast and place internal memory to bring that the speed of calling is fast, the advantage of good stability by system data, but, also have following defective simultaneously: (1) is with storing audio, video data in the built-in hard disk, because hard-disk capacity is limited, the remaining time of data is short, is difficult to support the image of high definition; Because each control point data are disperseed storage, can't build large-scale supervisory control system simultaneously.(2) the defeated propagation distance that all is subjected to of wireless transmission or electric oral instructions limits, and whole system can not be laid on a large scale, can't satisfy the demand of extensive audio/video monitor and control system.In addition, the defeated cost of light oral instructions is also than higher.
All adopt local storage for above-mentioned disclosed two kinds of digital monitor systems, the finite capacity of local storage is along with audio-video monitoring is increasingly extensive, the number of data acquisition unit 11 is more and more, the existing digital monitor system of the local storage of data can not satisfy the requirement of this large scale network communication trend, if will realize the network storage of digital monitor system data, also there are not the encoding terminal of network enabled storage and the decoding terminal that corresponding network enabled reads at present.In addition, the defeated propagation distance that all is subjected to of existing wireless transmission or electric oral instructions limits, and also the network storage for farther distance provides obstruction.
These 2 years, the safety system obtained national great attention, and dropped into huge fund in the needed safety guarantee engineering of this harmonious society of each urban construction.It requires each city to set up supervisory control system in key points such as each public institution, traffic main arteries.The safety system configuration of the previous typical urban of order is: city office has 20 branch offices under its command, and each branch office has 25 local police stations under its command, and each local police station is provided with 1K camera.If with the branch office is that unit sets up a digital monitor system, 2.5 general-purposes are arranged in the camera of gathering video data in each digital monitor system, the prior art supervisory control system does not have so big data storage capacities, large-capacity data is carried out the network storage become trend, and existing encoding terminal and decoding terminal do not have ability that network enabled storage and network read in addition, the restriction that all is subjected to propagation distance is failed in existing wireless transmission or electric oral instructions, can't satisfy the demand of large-scale supervisory control system.
Summary of the invention
First purpose of the present invention is to support the encoding terminal of the data network storage.
Second purpose of the present invention is to provide the encoding terminal that can support that data network reads.
The 3rd purpose of the present invention is the encoding and decoding terminal that data network is stored and data network reads that provides support.
In order to reach the present invention, the invention provides a kind of encoding terminal of IP based network, comprise coding unit, processor and the interface that is connected with the external IP network, described processor also comprises storage processing unit, wherein: storage processing unit: be used for by the storage behind the coding unit compressed encoding to the IP network storage subsystem.
Described storage processing unit further comprises: the protocol encapsulation subelement: be used for protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem; The first interface subelement: be used for obtaining the storage resources that the IP network storage subsystem is distributed to this encoding terminal, and described protocol data is stored on the corresponding storage resources.
Described protocol encapsulation subelement is an iSCSI protocol encapsulation subelement, is used for the iSCSI protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem.
Described encoding terminal is to provide the Ethernet electricity that is connected with the external IP network mouthful, Ethernet light mouth and EPON mouth by an Ethernet switching chip, Ethernet switching chip with directly be connected with the processor that has MAC or be connected with the processor that does not have MAC by mac controller.
Described encoding terminal is to provide Ethernet electricity mouth, Ethernet light mouth and the EPON mouth that is connected with the external IP network by a plurality of Ethernet phy chips, and each Ethernet phy chip is connected with the processor that directly has Ethernet media access controller MAC or is connected with the processor that does not have MAC by mac controller.
A kind of decoding terminal of IP based network, described decoding terminal comprises decoding unit, processor and the interface that is connected with the external IP network, described processor also comprises reading processing unit, wherein: reading processing unit: sense data from the IP network storage subsystem, and process data into the packed data that decoding unit can be handled.
Described reading processing unit further comprises: the second interface subelement: the storage that is used to obtain the needs decoding is the conclude a bargain data in the memory location of IP network storage subsystem and from the memory location of the whole storage system correspondence of IP network, perhaps, the storage that is used for obtaining needs decoding conclude a bargain data and obtain the storage resources that the IP network storage subsystem is distributed to this decoding terminal and from the memory location of the whole storage system correspondence of IP network in the memory location of IP network storage subsystem; Agreement decapsulation unit: be used for protocol data is descapsulated into the packed data that decoding unit can be handled.
Described agreement decapsulation subelement is an iSCSI agreement decapsulation subelement, and the iSCSI protocol data that is used for obtaining from the IP network storage subsystem is descapsulated into the packed data that decoding unit can be handled.
Described decoding terminal is to provide the Ethernet electricity that is connected with the external IP network mouthful and Ethernet light mouth by an Ethernet switching chip, Ethernet switching chip with directly be connected with the processor that has MAC or be connected with the processor that does not have MAC by mac controller.
Described decoding terminal is to provide Ethernet electricity mouth and the Ethernet light mouth that is connected with the external IP network by a plurality of Ethernet phy chips, and each Ethernet phy chip is connected with the processor that directly has MAC or is connected with the processor that does not have MAC by mac controller.
A kind of encoding and decoding terminal, comprise coding unit, decoding unit, processor and the interface that is connected with the external IP network, described processor also comprises storage processing unit and reading processing unit, wherein: storage processing unit: be used for by the storage behind the coding unit compressed encoding to the IP network storage subsystem; Reading processing unit: sense data from the IP network storage subsystem, and process data into the packed data that decoding unit can be handled.
Described storage processing unit further comprises: the protocol encapsulation subelement: be used for protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem; The first interface subelement: be used for obtaining the storage resources that the IP network storage subsystem is distributed to this encoding terminal, and described protocol data is stored on the corresponding storage resources;
Described reading processing unit further comprises: the second interface subelement: the storage that is used to obtain the needs decoding is the conclude a bargain data in the memory location of IP network storage subsystem and from the memory location of the whole storage system correspondence of IP network, perhaps, the storage that is used for obtaining needs decoding conclude a bargain data and obtain the storage resources that the IP network storage subsystem is distributed to this decoding terminal and from the memory location of the whole storage system correspondence of IP network in the memory location of IP network storage subsystem; Agreement decapsulation unit: be used for protocol data is descapsulated into the packed data that decoding unit can be handled.
Described protocol encapsulation subelement is an iSCSI protocol encapsulation subelement, is used for the iSCSI protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem; Described agreement decapsulation subelement is an iSCSI agreement decapsulation subelement, and the iSCSI protocol data that is used for obtaining from the IP network storage subsystem is descapsulated into the packed data that decoding unit can be handled.
Compared with prior art, the invention provides a kind of encoding terminal that is specially adapted for data network storage, be specially adapted for decoding terminal that data network reads and encoding and decoding terminal with codec functions.Encoding terminal passes through storage processing unit, audio, video data is stored in the IP network storage subsystem, decoding terminal passes through reading processing unit, to from the IP network storage subsystem, read audio, video data, realized centralized stores and the centralized management of supervisory control system, provide condition for building large-scale supervisory control system to audio, video data.
In addition, storage processing unit and reading processing unit adopt the iSCSI agreement, set up communicating by letter of encoding terminal and decoding terminal and IP network, but have overcome the technical problem of building the high and interoperability difference of supervisory control system cost.
Terminal of the present invention provides plurality of access modes: light mouth, electricity mouth, flexible, the different demands of applicable users.
Encoding terminal of the present invention and encoding and decoding terminal adopt EPON technology access network, it is on-the-spot to have realized that encoding terminal is installed in monitoring, do not need to introduce vision signal by equipment such as optical transceivers, optical fiber does not need power supply in the transmission way, do not have electronic unit, lay easily, need not safeguard substantially, greatly reduce the network struction cost of extensive video monitoring system, saved long-term operation cost and management cost; Expansion is easy to upgrading easily.Encoding terminal adopts EPON technology access network, and very high bandwidth is provided.EPON can provide the bandwidth of the 1Gbps of up-downgoing symmetry at present, and along with the development of technology can be upgraded to 10Gbps, can satisfy following video monitoring demand.
Description of drawings
Fig. 1 is a kind of structural representation of existing audio/video monitor and control system;
Fig. 2 is the schematic diagram of audio/video monitor and control system of the present invention;
Fig. 3 is the principle schematic of encoding terminal of the present invention;
Fig. 4 is existing a kind of EPON topology diagram;
Fig. 5 is a kind of connection block diagram of encoding terminal multiple interfaces of the present invention;
Fig. 6 connects block diagram for the another kind of encoding terminal multiple interfaces of the present invention;
Fig. 7 is an instance graph of encoding terminal of the present invention;
Fig. 8 is the theory structure schematic diagram of decoding terminal disclosed by the invention;
Fig. 9 is the connection block diagram of the multiple interfaces of decoding terminal of the present invention;
Figure 10 is an instance graph of decoding terminal of the present invention;
Figure 11 is the theory structure schematic diagram of encoding and decoding terminal of the present invention;
Figure 12 is the embodiment schematic diagram of encoding and decoding terminal of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
See also Fig. 2, it is the schematic diagram of audio/video monitor and control system of the present invention.Audio/video monitor and control system comprises data acquisition unit, encoding terminal, decoding terminal, IP network storage subsystem at least.Wherein, data acquisition unit is used to gather audio, video data, and the audio, video data that encoding terminal is used for gathering carries out compressed encoding, and the data behind the compressed encoding are saved in the IP network storage subsystem.The IP network storage subsystem comprises audio frequency and video storing IP SAN (storage area network) and video storage management server or comprises audio frequency and video storing IP SAN separately.Decoding terminal is used for obtaining to de-compress into audio/video flow after the data from the IP network storage subsystem, so that play in real time or playback by audio frequency and video output device (as television set).
Owing to utilize the big advantage of network stored data amount that data are carried out the network storage, overcome the limited defective of local memory capacity, thereby the number that can satisfy data acquisition unit is more and more, the increasing demand of storage data volume, and then makes that building extensive audio/video monitor and control system becomes possibility.
Below introduce encoding terminal and decoding terminal.
See also Fig. 3, it is for the principle schematic of encoding terminal of the present invention.It comprises coding unit 21, processor (CPU) 22 and the interface 23 that is connected with the external IP network, clock 24, FLASH (flash memory) 25 and internal memory 26.Because clock 24, FLASH (flash memory) 25 and internal memory 26 are known technologies, just no longer introduce at this, need to prove that in addition existing a lot of CPU22 carry clock and memory cell.
Coding unit 21: be used for signal compression coding.Such as, coding unit 21 can compress video data and voice data according to existing compression standard (as adopting mpeg standard).Usually coding unit 21 can adopt codec chip, on chip, be integrated with analog to digital converter, be used for will simulation vision signal, audio signal be converted to digital signal, the software that is provided with on by codec chip is finished data-signal is compressed by predefined standard.Certainly, coding unit 21 also can be arranged on encoding software on the CPU22 and independent analog to digital converter, after analog to digital converter carries out analog-to-digital conversion, finishes data and compresses by predefined standard by being arranged on encoding software on the CPU22.Because coding unit is a known technology, just do not describing in detail at this.
The present invention is provided with a storage processing unit 221 in processor 22, wherein:
One storage processing unit 221: be used for by the storage behind the coding unit compressed encoding to the IP network storage subsystem.
Described storage processing unit 221 may further include:
Protocol encapsulation subelement: be used for protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem;
The first interface subelement: be used for obtaining the storage resources that the IP network storage subsystem is distributed to this encoding terminal, and described protocol data is stored on the corresponding storage resources.
Protocol encapsulation subelement of the present invention can adopt iSCSI protocol encapsulation subelement, is used for the iSCSI protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem.ISCSI agreement (Internet Small Computer System Interface) is a kind of SCSI based on TCP/IP (small computer system interface) host-host protocol, in order to transmit scsi command and data by IP network between applied host machine (as encoding terminal, decoding terminal) and IP network storage subsystem.Iscsi technology standardization (RFC3720, RFC3721 etc.).At present, very fast based on the development of iSCSI protocol of I P Network storage technology, adopt the IP-based SAN of iSCSI protocol construction (StorageArea Network, storage area network), overcome the problem of SAN system optical-fibre channel cost height and NAS (Network Attached Storage, network attached storage) system's poor operability.Encapsulation mainly is meant the data transaction behind the compressed encoding become the iSCSI protocol data, such as, the iSCSI agreement adopts the RFC3720 standard, then the data behind the compressed encoding is being changed according to the rule of RFC3720 standard code.
The first interface subelement can be after encoding terminal starts, the request of sending Resources allocation from trend IP network storage subsystem, and the storage resources of distributing to this encoding terminal that the IP network storage subsystem is returned preserved, it is this storage resources of carry, obtain a virtual network hard disc, the data of protocol encapsulation subelement encapsulation are write in the corresponding virtual network hard disc by the first interface subelement at every turn.Such as, in encapsulation process, set up into the piece of fixed size, directly virtual hard disk is carried out block operations when writing data, promptly by sector write-in block data.
Above-mentioned disclosed only be storage processing unit 221 1 examples, implementation is more than, and this is a kind of.Such as, on this encoding terminal, preserve the storage resources that the IP network storage subsystem is distributed to this encoding terminal in advance, the data after coding unit 21 is handled are directly write on the corresponding storage resources.In addition, storage processing unit 221 is normally realized by software.
The transmission of the real-time monitor data of encoding terminal and iSCSI storage data all is to realize by network service.Encoding terminal of the present invention can provide the multiple network interface, comprises Ethernet electricity mouth and Ethernet light mouth.Ethernet electricity mouth/light mouth is mainly used in communicating by letter of in short range (as Surveillance center) realization encoding terminal and IP network equipment.
Encoding terminal of the present invention can also provide EPON (Ethernet Passive Optical Network, Ethernet passive optical network) mouthful.EPON is meant Ethernet passive optical network, is a kind of optical fiber access technology.EPON is proposed by EFM (the Ethernet in the First Mile) working group that sets up in November, 2000 and carry out standard in IEEE 802.3ah standard, and it is gone up with Ethernet at EPON (PON) is that carrier sends data flow.Because EPON adopts the Ethernet packaged type, so be very suitable for bearer IP service.The EPON technology adopts the user network topological structure of point to multiple spot, utilizes optical fiber to realize that the full-service of video, voice-and-data inserts.
See also Fig. 4, it is existing a kind of EPON topology diagram.It comprises optical line terminal (OLT) and some optical network units (ONU).Be connected by passive devices such as optical fiber, optical branching devices between OLT and each ONU.When guaranteeing reliability, distance can reach 20KM, even longer, utilizes the EPON access network simultaneously, and very high bandwidth can be provided.In the encoding terminal of audio/video monitor and control system, adopt the access way of EPON technology, can realize audio, video data Digitized Transmission and networking as network.That is to say that encoding terminal is provided with the EPON mouth, encoding terminal and data acquisition unit can be installed in together monitoring when on-the-spot, adopt the EPON mouth and the long-range network equipment to communicate.Monitoring is on-the-spot by optical fiber is installed, and with the encoding terminal access network, a plurality of encoding terminals are coupled to same optical fiber by passive optical splitters, finally deliver to the switching equipment OLT receiving terminal that is positioned at far-end.
Encoding terminal of the present invention can provide the Ethernet electricity that is connected with the external IP network mouthful, Ethernet light mouth and EPON mouth by an Ethernet switching chip (SWITH chip), Ethernet switching chip with directly be connected or be connected with the processor that does not have MAC by mac controller with the processor that has MAC (Ethernet media access controller).Such as, Ethernet switching chip adopts six mouthfuls of Ethernet switching chip.See also Fig. 5, it is for a kind of connection block diagram of encoding terminal multiple interfaces of the present invention.Described CPU has mac controller, and six mouthfuls of Ethernet switching chip directly are connected with CPU.Port0 (port 0), port1 are configured to the 100BASE-FX light-emitting window, and port2, port3 are configured to 10base-T/100BASE-TX and go out the electricity mouth, and port4 is configured to connect the EPON mouth of EPON card, and port5 links to each other with processor CPU.
Described encoding terminal can also provide Ethernet electricity mouth, Ethernet light mouth and the EPON mouth that is connected with the external IP network by a plurality of PHY chips (Ethernet phy chip), and each PHY chip is connected with the processor that directly has MAC or is connected with the processor that does not have MAC by mac controller.See also Fig. 6, it is the another kind connection block diagram that coding of the present invention is compiled the end multiple interfaces.One end of each PHY chip connects a port (port), and the other end connects CPU by mac controller.If CPU has mac controller, then can directly not connect the CPU that has MAC by independent mac controller.The present invention can become the EPON mouth with a port arrangement wherein.
Encoding terminal provides Ethernet electricity mouth, Ethernet light mouth and EPON mouth by Ethernet switching chip and PHY chip, and in addition, encoding terminal also provides video input interface and audio input interface by coding chip, so that the analog signal input.Encoding terminal of the present invention provides multiple interfaces, applicable to user's different demands.Particularly, encoding terminal adopts EPON technology access network, it is on-the-spot to have realized that encoding terminal is installed in monitoring, do not need to introduce audio-video signal by equipment such as optical transceivers, optical fiber does not need power supply in the transmission way, do not have electronic unit, lay easily, substantially need not safeguard, greatly reduce the network struction cost of extensive video monitoring system, save long-term operation cost and management cost; Expansion simultaneously is easy to upgrading easily.Encoding terminal adopts EPON technology access network, and very high bandwidth is provided.EPON can provide the bandwidth of the 1Gbps of up-downgoing symmetry at present, and along with the development of technology can be upgraded to 10Gbps, can satisfy following video monitoring demand.
See also Fig. 7, it is for an instance graph of encoding terminal of the present invention.It mainly comprises coding chip, processor and Ethernet switching chip.Coding chip provides video input interface and audio input interface, and the SDRAM that is connected with coding chip (synchronous DRAM) and DPRAM (two-port RAM) are mainly used in to set up with CPU and communicate by letter and preserve encoding scheme etc.CPU circumscribed USB interface, RS422/485, RS232, and connect real-time clock (RTC), FLASH and SDRAM.CPU directly connects Ethernet switching chip and is connected to Ethernet switching chip by CPLD (programmable logic device).Ethernet switching chip is mainly used in provides a plurality of communication interfaces.
Encoding terminal provides audio/video coding, by microphone, camera input audio frequency and video, by coding chip audio-video signal is carried out compressing after the analog-to-digital conversion, then compressed encoding is encapsulated as the iSCSI protocol data, in the virtual network hard disc that writes direct.In fact, video data is to be stored in the IP SAN memory device.
See also Fig. 8, it is the theory structure schematic diagram of decoding terminal disclosed by the invention.It comprises decoding unit 31, processor (CPU) 32 and the interface 33 that is connected with the external IP network, clock 34, FLASH (flash memory) 35 and internal memory 36.Because clock 34, FLASH (flash memory) 35 and internal memory 36 are known technologies, just no longer introduce at this, need to prove that in addition existing a lot of CPU22 carry clock and memory cell.
Decoding unit 31: be used for converting the laggard line number mould of signal decompression to analog signal.The decoding rule of decoding unit 31 is corresponding with the coding rule that adopts coding unit 21.Ordinary solution code element 31 adopts decoding chips, and the software that is provided with on by decoding chip is finished data-signal is decompressed, and by being integrated in the digital to analog converter on the chip, digital signal is converted to vision signal, the audio signal of simulation.Because coding unit is a known technology, just do not describing in detail at this.
The present invention is provided with a reading processing unit 321 in processor 32: sense data from the IP network storage subsystem, and process data into the packed data that decoding unit can be handled.
Described reading processing unit 321 further comprises:
The second interface subelement: the storage that is used to obtain the needs decoding is the conclude a bargain data in the memory location of IP network storage subsystem and from the memory location of the whole storage system correspondence of IP network, perhaps, the storage that is used for obtaining needs decoding conclude a bargain data and obtain the storage resources that the IP network storage subsystem is distributed to this decoding terminal and from the memory location of the whole storage system correspondence of IP network in the memory location of IP network storage subsystem.In the process that virtual hard disk is read, decoding terminal directly carries out the piece read operation by disk sector, and the process of reading adopts similar: the mode of read/write-sector number-data reads out data from virtual hard disk.
Agreement decapsulation unit: be used for protocol data is descapsulated into the packed data that decoding unit can be handled.When encoding terminal adopts iSCSI protocol encapsulation subelement, the agreement decapsulation unit adopts corresponding iSCSI agreement decapsulation subelement, and the iSCSI protocol data that is used for obtaining from the IP network storage subsystem is descapsulated into the packed data that decoding unit can be handled.
In addition, the second interface subelement after decoding terminal starts, the request of sending Resources allocation from trend IP network storage subsystem, and the storage resources of distributing to this decoding terminal that the IP network storage subsystem is returned preserved, be this storage resources of carry, obtain a virtual network hard disc.Like this, can utilize the virtual network hard disk of acquisition to carry out audio frequency and video and carry out playback.Certainly, also can the one big capacity storage that is used for the audio frequency and video playback be set at this decoding terminal.
The transmission of the real-time monitor data of decoding terminal and iSCSI storage data all is to realize by network service.Decoding terminal can provide the multiple network interface, comprises Ethernet electricity mouth and Ethernet light mouth.Ethernet electricity/light mouth is mainly used in short range (as Surveillance center) and realizes communicating by letter of the decoding terminal and the network equipment.
Such as, described decoding terminal is to provide the Ethernet electricity that is connected with the external IP network mouthful and Ethernet light mouth by an Ethernet switching chip, Ethernet switching chip with directly be connected with the processor that has MAC or be connected with the processor that does not have MAC by mac controller.
Ethernet switching chip adopts six mouthfuls of Ethernet switching chip.See also Fig. 9, it is the connection block diagram of the multiple interfaces of decoding terminal of the present invention.Port0, port1 are configured to the 100BASE-FX light-emitting window, and port2, port3 are configured to 10base-T/100BASE-TX and go out the electricity mouth, and port5 links to each other with the MAC (Ethernet media access controller) of processor CPU.
Described decoding terminal is to provide Ethernet electricity mouth and the Ethernet light mouth that is connected with the external IP network by a plurality of PHY chips, and each PHY chip is connected with the processor that directly has MAC or is connected with the processor that does not have MAC by mac controller.
See also Figure 10, it is for an instance graph of decoding terminal of the present invention.It mainly comprises decoding chip, processor and Ethernet switching chip.Decoding chip provides video output interface and audio output interface, and the SDRAM that is connected with coding chip (synchronous DRAM) and DPRAM (two-port RAM) are mainly used in to set up with CPU and communicate by letter and preserve decoding scheme etc.CPU circumscribed USB interface, RS422/485, RS232, and connect real-time clock (RTC), FLASH and SDRAM.CPU directly connects Ethernet switching chip and is connected to Ethernet switching chip by CPLD (programmable logic device).Ethernet switching chip is mainly used in provides a plurality of communication interfaces.
Decoding terminal provides audio/video decoding, can be by equipment such as television set output audio frequency and video.During video playback operation, decoding terminal obtains video data by the accesses network hard disk, realize the decoding of compressed video data by decoding software on the processor or dedicated tone video decoding chip, and digital of digital video data is converted to analog video data output, so that by equipment such as television set output audio frequency and video.
The invention also discloses a kind of encoding and decoding terminal.That is to say, the function collection that above-mentioned two kinds of equipment are finished is finished on an encoding and decoding terminal.Please refer to Figure 11, it comprises decoding unit 41, coding unit 47, processor (CPU) 42 and the interface 43 that is connected with the external IP network, clock 44, FLASH (flash memory) 45 and internal memory 46, described processor 42 also comprises storage processing unit 421 and reading processing unit 422, wherein:
Storage processing unit 421: be used for by the storage behind the coding unit compressed encoding to the IP network storage subsystem;
Reading processing unit 422: sense data from the IP network storage subsystem, and process data into the packed data that decoding unit can be handled.
Need to prove that decoding unit 41 and coding unit 42 can adopt codec chip to finish, in addition, also can realize by the software that is arranged on the CPU.
And described storage processing unit 421 further comprises:
Protocol encapsulation subelement: be used for protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem;
The first interface subelement: be used for obtaining the storage resources that the IP network storage subsystem is distributed to this encoding terminal, and described protocol data is stored on the corresponding storage resources;
Described reading processing unit 422 further comprises:
The second interface subelement: the storage that is used to obtain the needs decoding is the conclude a bargain data in the memory location of IP network storage subsystem and from the memory location of the whole storage system correspondence of IP network, perhaps, the storage that is used for obtaining needs decoding conclude a bargain data and obtain the storage resources that the IP network storage subsystem is distributed to this decoding terminal and from the memory location of the whole storage system correspondence of IP network in the memory location of IP network storage subsystem;
Agreement decapsulation unit: be used for protocol data is descapsulated into the packed data that decoding unit can be handled.
Described protocol encapsulation subelement is an iSCSI protocol encapsulation subelement, is used for the iSCSI protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem; Described agreement decapsulation subelement is an iSCSI agreement decapsulation subelement, and the iSCSI protocol data that is used for obtaining from the IP network storage subsystem is descapsulated into the packed data that decoding unit can be handled.
Described encoding and decoding terminal can provide the Ethernet electricity that is connected with the external IP network mouthful, Ethernet light mouth and EPON mouth by an Ethernet switching chip, Ethernet switching chip with directly be connected with the processor that has MAC or be connected with the processor that does not have MAC by mac controller.Described encoding and decoding terminal can provide Ethernet electricity mouth, Ethernet light mouth and the EPON mouth that is connected with the external IP network by a plurality of PHY chips, and each PHY chip is connected with the processor that directly has MAC or is connected with the processor that does not have MAC by mac controller.
See also Figure 12, it is for the enforcement schematic diagram of encoding and decoding terminal.It mainly comprises codec chip, processor and Ethernet switching chip.Codec chip provides video input interface, video output interface, audio input interface and audio output interface, and the SDRAM that is connected with codec chip (synchronous DRAM) and DPRAM (two-port RAM) are mainly used in to set up with CPU and communicate by letter and preserve coding and decoding scheme etc.CPU circumscribed USB interface, RS422/485, RS232, and connect real-time clock (RTC), FLASH and SDRAM.CPU directly connects Ethernet switching chip and is connected to Ethernet switching chip by CPLD (programmable logic device).Ethernet switching chip is mainly used in provides a plurality of communication interfaces.
Encoding and decoding terminal disclosed by the invention can be placed on this end of data acquisition, is used as encoding terminal and comes usefulness, also can be placed on audio frequency and video and play this end, is used as decoding terminal and uses.
Still be example with the safety system, encoding terminal of the present invention can be installed in the monitoring scene together with a camera or several camera, decoding terminal can be installed in an end of playing audio/video (as video wall).The IP network storage subsystem that encoding terminal and decoding terminal are connected to by IP network, can to make up one fully be unit with the branch office, be unit even bigger digital monitor system with city office.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop in protection scope of the present invention.
Claims (13)
1, a kind of encoding terminal of IP based network comprises coding unit, processor and the interface that is connected with the external IP network, it is characterized in that described processor also comprises storage processing unit, wherein:
Storage processing unit: be used for by the storage behind the coding unit compressed encoding to the IP network storage subsystem.
2, encoding terminal as claimed in claim 1 is characterized in that, described storage processing unit further comprises:
Protocol encapsulation subelement: be used for protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem;
The first interface subelement: be used for obtaining the storage resources that the IP network storage subsystem is distributed to this encoding terminal, and described protocol data is stored on the corresponding storage resources.
3, encoding terminal as claimed in claim 2 is characterized in that, described protocol encapsulation subelement is an iSCSI protocol encapsulation subelement, is used for the iSCSI protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem.
4, encoding terminal as claimed in claim 1 or 2, it is characterized in that, described encoding terminal is to provide the Ethernet electricity that is connected with the external IP network mouthful, Ethernet light mouth and EPON mouth by an Ethernet switching chip, Ethernet switching chip with directly be connected with the processor that has MAC or be connected with the processor that does not have MAC by mac controller.
5, encoding terminal as claimed in claim 1 or 2, it is characterized in that, described encoding terminal is to provide Ethernet electricity mouth, Ethernet light mouth and the EPON mouth that is connected with the external IP network by a plurality of Ethernet phy chips, and each Ethernet phy chip is connected with the processor that directly has Ethernet media access controller MAC or is connected with the processor that does not have MAC by mac controller.
6, a kind of decoding terminal of IP based network comprises decoding unit, processor and the interface that is connected with the external IP network, it is characterized in that described processor also comprises reading processing unit, wherein:
Reading processing unit: sense data from the IP network storage subsystem, and process data into the packed data that decoding unit can be handled.
7, decoding terminal as claimed in claim 6 is characterized in that, described reading processing unit further comprises:
The second interface subelement: the storage that is used to obtain the needs decoding is the conclude a bargain data in the memory location of IP network storage subsystem and from the memory location of the whole storage system correspondence of IP network, perhaps, the storage that is used for obtaining needs decoding conclude a bargain data and obtain the storage resources that the IP network storage subsystem is distributed to this decoding terminal and from the memory location of the whole storage system correspondence of IP network in the memory location of IP network storage subsystem;
Agreement decapsulation unit: be used for protocol data is descapsulated into the packed data that decoding unit can be handled.
8, decoding terminal as claimed in claim 7, it is characterized in that, described agreement decapsulation subelement is an iSCSI agreement decapsulation subelement, and the iSCSI protocol data that is used for obtaining from the IP network storage subsystem is descapsulated into the packed data that decoding unit can be handled.
9, as claim 6 or 7 described decoding terminals, it is characterized in that, described decoding terminal is to provide the Ethernet electricity that is connected with the external IP network mouthful and Ethernet light mouth by an Ethernet switching chip, Ethernet switching chip with directly be connected with the processor that has MAC or be connected with the processor that does not have MAC by mac controller.
10, as claim 6 or 7 described decoding terminals, it is characterized in that, described decoding terminal is to provide Ethernet electricity mouth and the Ethernet light mouth that is connected with the external IP network by a plurality of Ethernet phy chips, and each Ethernet phy chip is connected with the processor that directly has MAC or is connected with the processor that does not have MAC by mac controller.
11, a kind of encoding and decoding terminal comprises coding unit, decoding unit, processor and the interface that is connected with the external IP network, it is characterized in that described processor also comprises storage processing unit and reading processing unit, wherein:
Storage processing unit: be used for by the storage behind the coding unit compressed encoding to the IP network storage subsystem;
Reading processing unit: sense data from the IP network storage subsystem, and process data into the packed data that decoding unit can be handled.
12, encoding and decoding terminal as claimed in claim 11 is characterized in that,
Described storage processing unit further comprises:
Protocol encapsulation subelement: be used for protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem;
The first interface subelement: be used for obtaining the storage resources that the IP network storage subsystem is distributed to this encoding terminal, and described protocol data is stored on the corresponding storage resources;
Described reading processing unit further comprises:
The second interface subelement: the storage that is used to obtain the needs decoding is the conclude a bargain data in the memory location of IP network storage subsystem and from the memory location of the whole storage system correspondence of IP network, perhaps, the storage that is used for obtaining needs decoding conclude a bargain data and obtain the storage resources that the IP network storage subsystem is distributed to this decoding terminal and from the memory location of the whole storage system correspondence of IP network in the memory location of IP network storage subsystem;
Agreement decapsulation unit: be used for protocol data is descapsulated into the packed data that decoding unit can be handled.
13, encoding and decoding terminal as claimed in claim 12 is characterized in that,
Described protocol encapsulation subelement is an iSCSI protocol encapsulation subelement, is used for the iSCSI protocol data that the data encapsulation behind the compressed encoding can be handled for the IP network storage subsystem;
Described agreement decapsulation subelement is an iSCSI agreement decapsulation subelement, and the iSCSI protocol data that is used for obtaining from the IP network storage subsystem is descapsulated into the packed data that decoding unit can be handled.
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| CNB2006101040302A CN100521594C (en) | 2006-07-31 | 2006-07-31 | Coding terminal, decoding terminal and coding and decoding terminal based on IP network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873473B (en) * | 2009-10-16 | 2012-04-04 | 杭州海康威视数字技术股份有限公司 | Digital video camera with optical fiber interface |
| CN102938839A (en) * | 2012-11-13 | 2013-02-20 | 浙江宇视科技有限公司 | Monitoring front-end equipment and encoding server |
| CN107968729A (en) * | 2017-12-22 | 2018-04-27 | 中国铁道科学研究院通信信号研究所 | A kind of railway signal data flow storage management system |
-
2006
- 2006-07-31 CN CNB2006101040302A patent/CN100521594C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873473B (en) * | 2009-10-16 | 2012-04-04 | 杭州海康威视数字技术股份有限公司 | Digital video camera with optical fiber interface |
| CN102938839A (en) * | 2012-11-13 | 2013-02-20 | 浙江宇视科技有限公司 | Monitoring front-end equipment and encoding server |
| CN102938839B (en) * | 2012-11-13 | 2016-08-17 | 浙江宇视科技有限公司 | A kind of monitoring frontend and encoder server |
| CN107968729A (en) * | 2017-12-22 | 2018-04-27 | 中国铁道科学研究院通信信号研究所 | A kind of railway signal data flow storage management system |
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| Publication number | Publication date |
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| CN100521594C (en) | 2009-07-29 |
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