CN201585083U - DVB code stream monitoring system - Google Patents
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- CN201585083U CN201585083U CN 200920319030 CN200920319030U CN201585083U CN 201585083 U CN201585083 U CN 201585083U CN 200920319030 CN200920319030 CN 200920319030 CN 200920319030 U CN200920319030 U CN 200920319030U CN 201585083 U CN201585083 U CN 201585083U
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Abstract
The utility model relates to a DVB code stream monitoring system which comprises a lower computer, a switch and an upper computer; the lower computer is connected with the switch through a local area network and is connected with the upper computer through the switch; the lower computer comprises at least a TS code steam capture card and a lower computer CPU; each TS code stream capture card comprises at least a group of ASI input interfaces, each group of ASI input interfaces comprises at least an interface, the ASI input interface is respectively and sequentially connected with an FPGA board, a cache device and a PCI bridge; the lower computer CPU comprises a collection device, an analyzing device and an event monitoring device connected with the collection device, a comparing device connected with the event monitoring device and a reporting device connected with the analyzing device and the comparing device; and the reporting device sends the reporting information to the upper computer through the switch. Therefore, the utility model provides a DVB code stream monitoring system which has the advantages of large-capacity monitoring, low cost, practicality and convenience.
Description
Technical field
The utility model relates to a kind of monitoring system, the special-purpose monitoring system that particularly a kind of typical value to the factor that influences signal quality of digital television that is used for TV and Radio Service and CATV transmission and distribution network detects automatically.
Background technology
The radio data system monitoring is the important component part of radio and television services.For the mistake of preventing broadcast TV program is broadcast, is badly broadcast even break, in order to prevent the illegal programs invasion, guarantee broadcast TV program safety, stable, broadcast and transmission reliably, must strengthen the monitoring of radio data system.
DVB (digital video broadcasting, Digital Video Broadcasting) is the Digital Television Open Standard by a series of international recognitions of DVB project maintenance.The DVB project is an industrial organization by more than 300 member compositions, and it is to be initiated by the joint specialist group that european telecommunications standards institute, European electronic standard tissue and European Broadcasting Union constitute jointly.
1993, international digital video broadcasting tissue (DVB tissue) was set up in Europe, and the aim of DVB is to design a general digital television system, and the conversion between these intrasystem various transmission meanss has the simplest mode, increases versatility as much as possible.The DVB standard provides a cover digital television system standard complete, that be applicable to different media.The DVB digital broadcasting transmission system has utilized all general television broadcast transmissions medium that comprise satellite, wired, ground, SMATV, MNDSD.The DVB standard that they are corresponding respectively: DVB-S, DVB-C, DVB-T, DVB-SMATV, DVB-MS and DVB-MC.
The core of DVB standard:
(1) system adopts audio frequency, video and the data formats of MPEG-2 compression as resource;
(2) system adopts public MPEG-2 transmission (TS) multiplex mode;
(3) system adopts public being used to describe the system service information (SI) of broadcast program;
(4) the 1st of system the grade of chnnel coding adopts the protection of R-S forward error correction coding;
(5) modulation and other attached channel coding methods are determined by different transmission mediums; Use general method for scrambling and condition receiving interface.
The transmission system of DVB standard is divided into information source encoding and decoding (Source Coding) and channel coding/decoding (ChannelCoding) two parts.Source encoding adopts the MPEG-2 code stream, at first Voice ﹠ Video is carried out multiplexingly, and then transmits a plurality of digital television program streams multiplexing.Carry out corresponding demultiplexing and decoding at receiving terminal.
Channel coding/decoding comprises: forward error correction coding, decoding, modulate, separate and be in harmonious proportion upper and lower frequency conversion 3 parts.Satellite transmits adopts QPSK (modulation of 4 phase phase shift keyings) mode, and wire transmission adopts QAM (quadrature amplitude modulation) mode, and terrestrial transmission adopts COFDM (Coded Orthogonal Frequency Division Multiplexing (COFDM)) or 16VSB (modulation of 16 level vestigial side bands) mode.
DVB-C digital cable broadcast system standard: this standard with cable television network as transmission medium, applied range.Cable television system is divided into two parts: CATV front end and IRD (IRD).Adopt the transport stream of MPEG-2 compressed encoding, because the transmission medium employing is coaxial cable, compare anti-external interference ability with satellite transmits strong, and signal strength signal intensity is higher relatively.Modulation system has 16,32, three kinds of modes of 64QAM, and for the QAM modulation, the transmission information rate is high more, and antijamming capability is low more.When adopting the 64QAM quadrature amplitude modulation, the transmission code rate of a PAL passage is 41.34Mb/s, also can be multiplexing for multiple programs.The DVB-C transmission system have following some main feature: 1. can be suitable with multiple program source.The program that the DVB-C transmission system is transmitted both can derive from the program that receives from satellite system, can derive from local TV programme again, and other external programme signal; 2. can be used for Standard Digital Television and can be used for HDTV again.
China's cable television system adopts DVB-C digital cable broadcast system standard.
To the monitoring of digital television signal, according to the digital television standard that is adopted, the typical value of the factor of his-and-hers watches registration word TV signal performance detects automatically exactly, determines the quality that TV broadcasts.In order to ensure monitoring target safety, stable, operation reliably, the code stream monitoring need be carried out the monitoring of following three aspects:
1. safety monitoring: must carry out safety monitoring in order to prevent that the program mistake from broadcasting with the intrusion of illegal programs.Break multinomial measure such as detection by PID number detection, PCR continuity error detection, table version number change-detection, each PID code check bound and bag repeat the time limit (the promptly maximum inter-packet gap that allows), consistency check, the ECM stream shown and comprehensively detect, realize broadcasting safe monitoring.
Whether secure context meeting out of joint cause the program of this broadcast or not or be chaotic, and the program that should not broadcast has broadcasted.
2. mistake monitoring: mistake has following several situation:
Owing to reasons such as external interference, equipment degrade, system hardware and software imperfection cause code flow structure or relevant form not to meet the mistake of DVB standard or MPEG 2 standards, as synchronous byte error, package counting facility mistake or the like, but that these problems can both be recovered voluntarily is normal.
Owing to the reasons such as software and hardware imperfection of headend equipment cause under the stable condition code stream unstable or not steady, dynamic indicator by all code streams of continuous monitoring dedicated tunnel, as current code check and bandwidth, the minimax code check, maximum instantaneous code check (is unit with the millisecond), maximum inter-packet gap etc., can understand such as encoder, multiplexer, hypergene is grown up to be a useful person and the input and output situation of equipment such as CA maker and code stream match condition between them, can find that code stream output is fluctuated, even code stream wild effect such as packet loss cutout, but that these phenomenons can both be recovered voluntarily is normal.
Going wrong directly to cause the program broadcast quality to descend, and mosaic even pause occur as image, and sound sends kaka sound sound etc.
3. malfunction monitoring: fault has following several situation:
Need foreign intervention could recover normal mistake;
Recurring mistake (occurs recovering occurring not only but also recover ...);
Break down and directly to cause interruption program.
By monitoring can take place in time to pinpoint the problems when unusual, accurately orientation problem, correct analysis problem, queueing problem rapidly, recover normal with the fastest speed and broadcast.
Enter Digital Television after the epoch, that the code stream monitor becomes gradually is the most typical, most critical, the most effective monitoring equipment.Key link at TV and Radio Service's (station) and CATV transmission and distribution network is provided with the monitoring point, utilize the code stream monitoring equipment to detect automatically by typical value to the factor that influences the digital television signal performance, determine the quality that TV broadcasts, the mistake of forecast or report broadcast TV program broadcasts, badly broadcast even break and the invasion of illegal programs, guarantee broadcast TV program safety, stable, broadcast and transmission reliably.
Along with the development of radio and television digitlization process, constantly occur products such as code stream analysis instrument on the market, but they are generally single channel and detect, and monitoring index benefits exploitation broadcasting and TV equipment or product usefulness more, and not too practical for the operation monitoring of TV and Radio Service's net.
The utility model content
At the defective of above-mentioned prior art, the purpose of this utility model provides a kind of monitoring of capacity greatly, the low and practical and convenient DVB code stream monitoring system of cost.
For achieving the above object, the utility model adopts following technical scheme:
A kind of DVB code stream monitoring system comprises slave computer, switch and host computer, and described slave computer connects described switch, and connects described host computer by described switch, and described slave computer comprises at least one TS code flow collection card and slave computer CPU;
Every described TS code flow collection card comprises at least one group of ASI input interface, every group of ASI input interface comprises at least one interface, every group of described ASI input interface connects FPGA plate, buffer storage and PCI bridge respectively successively, the input code flow data are transferred to described FPGA plate by the ASI input interface and carry out respective handling, and the code stream after by described buffer storage described FPGA plate being handled carries out buffer memory, and is transferred among the described slave computer CPU by described PCI bridge;
The resolver that described slave computer CPU comprises harvester and connects described harvester and event monitoring device, the reporting device that is connected the comparison device of described event monitoring device and connects described resolver and described compare device;
Described harvester is gathered the code stream of described PCI bridge input, and will collect code stream and be divided into stream and table;
Described resolver receives stream and the table that described harvester sends, and resolves;
The data that the described harvester of described event monitoring device monitoring collects, and judge whether it is event data, be event data, then event data is sent in the comparison device;
Described comparison device is compared event data, meets the definition to incident, then incident is sent to described reporting device;
The incident that information after described reporting device is resolved described resolver and described comparison device send sends to host computer by described switch.
DVB code stream monitoring system of the present utility model, wherein every described slave computer comprises four described TS code flow collection cards.
DVB code stream monitoring system of the present utility model, wherein every described TS code flow collection card comprises two groups of ASI input interfaces, every group of ASI input interface comprises two interfaces.
DVB code stream monitoring system of the present utility model, wherein said TS code flow collection card is connected by pci bus with described slave computer CPU.
DVB code stream monitoring system of the present utility model, wherein said slave computer connects described switch by local area network (LAN).
The monitoring capacity that has solved the monitoring of separate unit slave computer by the designed DVB code stream monitoring system of the utility model is little, inconvenient problem, can make things convenient for, the key link at TV and Radio Service's (station) and CATV transmission and distribution network is provided with the monitoring point accurately and timely, broadcast television signal is monitored, capacity monitoring greatly, and every slave computer all adopts the TS code flow collection card to gather code stream, every TS code flow collection card comprises two ASI input interfaces, the passage of gathering is many, and cost is low and practical and convenient.
Description of drawings
Fig. 1 is the system block diagram of the utility model DVB code stream monitoring system.
Embodiment
Be elaborated below in conjunction with the execution mode of accompanying drawing to the utility model DVB code stream monitoring system.
Referring to Fig. 1, DVB code stream monitoring system of the present utility model is based on the special-purpose monitoring system that DVB code stream monitoring principle designs.This system comprises that eight slave computers (illustrating among the figure), every slave computer comprise four TS code flow collection cards 1 and slave computer CPU 2, and switch 3 and host computer 4.If slave computer more than eight, then makes per eight of unnecessary slave computer connect another host computer, connect more high-rise host computer by many host computers again, constitute tree structure.
Devices to test connects the ASI input interface 101 of TS code flow collection card 1, so that the following situation of Devices to test is monitored and shown.
DVB code stream monitoring system of the present utility model is monitored the channel overview and is shown, the code check statistics pie chart, bandwidth statistics pie chart or the incident statistics pie chart that promptly show all kinds of streams, for example program stream, practical table, other table, EMM (Entitlement Management Message) stream, ECM (Entitlement Control Message, Entitlement Control Message) stream, empty bag, other stream, the unknown are flowed etc.When entering special monitoring picture " port x.xPID information ", can also show the real-time curve chart of certain PID (Packet Identifier) code check.
And demonstrate the static information of all PID bags of channel, the title that comprises all stream/tables, the PID (for all program streams) of pid value, ID (identifier) value (for all tables)/affiliated PMT (Program Map Table, Program Map Table) table, stream id/ table id, stream type, limit bit rate (can set), code check lower limit (can set), repetition time limit, moment limit bit rate (can set), program sequence number, programm name, program supplier, program category by template by template by template.
The program stream situation is monitored, information such as the type of display program stream, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), maximum inter-packet gap, bandwidth, event count, and be furnished with graphical display intuitively (comprise pie chart and be the curve chart of abscissa with time); But information such as the code check bound set of explicit user oneself, moment code check (is unit with the millisecond) upper limit, the inter-packet gap upper limit also.
PSI (Program Specific Information table)/SI (service information list) situation is monitored (comprising the correctness and the consistency check of table), information such as the type of display list, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), largest segment interval, bandwidth, event count, program supplier, programm name, program category, and be furnished with graphical display intuitively (comprise pie chart and be the curve chart of abscissa with time); But information such as the code check bound set of explicit user oneself, moment code check (is unit with the millisecond) upper limit, the spacer segment upper limit also.And show that PSI/SI shows the tree structure of information, comprehensive, directly perceived, understandable.
EMM stream situation is monitored, show the information such as type, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), largest segment interval, bandwidth, event count, program supplier, programm name, program category of EMM, and be furnished with graphical display intuitively (comprise pie chart and be the curve chart of abscissa with time); But information such as the code check bound set of explicit user oneself, moment code check (is unit with the millisecond) upper limit, the spacer segment upper limit also.
ECM stream situation is monitored, show the information such as type, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), largest segment interval, bandwidth, event count, program supplier, programm name, program category of ECM, and be furnished with graphical display intuitively (comprise pie chart and be the curve chart of abscissa with time); But information such as the code check bound set of explicit user oneself, moment code check (is unit with the millisecond) upper limit, the spacer segment upper limit also.
Other stream situations are monitored, show the information such as type, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), largest segment interval, bandwidth, event count, program supplier, programm name, program category of other streams, and be furnished with graphical display intuitively (comprise pie chart and be the curve chart of abscissa with time); But information such as the code check bound set of explicit user oneself, moment code check (is unit with the millisecond) upper limit, the spacer segment upper limit also.
Sky bag situation is monitored, show the information such as type, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), largest segment interval, bandwidth, event count, program supplier, programm name, program category of empty bag, and be furnished with graphical display intuitively (comprise pie chart and be the curve chart of abscissa with time); But information such as the code check bound set of explicit user oneself, moment code check (is unit with the millisecond) upper limit, the spacer segment upper limit also.
The unknown bag situation is monitored, show the information such as type, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), largest segment interval, bandwidth, event count, program supplier, programm name, program category of unknown bag, and be furnished with graphical display intuitively (comprise pie chart and be the curve chart of abscissa with time); But information such as the code check bound set of explicit user oneself, moment code check (is unit with the millisecond) upper limit, the spacer segment upper limit also.
PCR (Program Clock Reference) situation to program is monitored, and shows indexs such as PCR shake, PCR interval, and shows with graph direct.
Record, demonstration, sound and light alarm, daily record, inquiry to incident; To the record of each fault of ETR mistake, show and inquire about that incident management and template are provided with etc.
A host computer 4 of the code stream monitoring system of native system can connect eight slave computers at most, and each slave computer can be monitored all programs or the data of eight passages or channel at most simultaneously.Utilize local area network (LAN) to connect between host computer 4 and the slave computer, communication protocol is TCP IP agreement, and switch 3 receptions is set and sends the information that slave computer is delivered to host computer.
Slave computer is the standard industry controller, and is reliable and stable, be easy to install.Every slave computer contains four special-purpose TS code flow collection cards 1, these cards are the PCI plug-in card, every TS code flow collection card 1 comprises two groups of standard A SI input interfaces 101 that meet DVB, every group of ASI input interface 101 comprises two interfaces, and maximum rate is 100Mbps, and every group of ASI input interface 101 connects FPGA plate 102, buffer storage 103 and PCI bridge 104 successively, be provided with onboard clock in the TS code flow collection card 1, precision is 3ppm, also can external Broadcasting Cable Network standard time clock, and precision is determined by external clock.Because every slave computer is provided with four TS code flow collection cards 1, two groups of ASI input interfaces 101 is set on the every TS code flow collection card 1, thereby makes every slave computer can monitor eight road input code flows simultaneously.
Two interfaces in two groups of ASI input interfaces 101 can connect the alternate device of Devices to test and Devices to test respectively, when Devices to test breaks down when enabling the alternate device of Devices to test, the staff can enable the interface of the alternate device of monitoring Devices to test at once.So both can save the monitoring equipment of the alternate device of monitoring Devices to test, quick-recovery monitoring soon again.
Two interfaces in two groups of ASI input interfaces 101 also can connect output, the input an of Devices to test (or one group of equipment) respectively, when when output is pinpointed the problems, the staff can enable the monitoring to the Devices to test input, compares test, the position of problem identificatioin.Under the situation that does not increase monitoring equipment, enlarge monitoring range like this, not only can realize horizontal monitoring but also can realize vertical monitoring.
One group of ASI input interface 101 connects FPGA plate 102, FPGA plate 102 is used for discerning automatically the packet length of the input code flow that ASI input interface 101 transmits, to remove greater than 204 bytes of 188 bytes or the follow-up unnecessary byte of 208 bytes, keeping 188 bytes transmits backward, its internal counter is counted the data volume of receiving, when data volume reaches certain value, bit stream data is sent into buffer storage 103 carry out buffer memory, send counter O reset after the data, count next time.
After the respective handling of input code flow through FPGA plate 102, carry out buffer memory by the input code flow after 102 processing of 103 pairs of FPGA plates of buffer storage.
Be connected by pci bus between TS code flow collection card 1 and the slave computer CPU 2, the input code flow after 103 pairs of FPGA plates of buffer storage 102 are handled carries out behind the buffer memory and this input code flow is transferred among the slave computer CPU 2 by PCI bridge 104.
The bit stream data of ASI input interface 101 inputs of another group is equally through 102 pairs of follow-up unnecessary byte removals greater than 204 bytes or 208 bytes of 188 bytes of FPGA plate, keeping 188 bytes transmits backward, another counter is counted the data volume of receiving, when data volume reaches certain value, bit stream data is sent into buffer storage 103 carry out buffer memory, after data are sent, counter O reset, and by pci bus with transfer of data in slave computer CPU 2.
The above-mentioned work of other three TS code flow collection cards, 1 same execution when occurring sending data simultaneously, because 103 pairs of data of buffer storage of every TS code flow collection card 1 are carried out buffer memory, can guarantee that the data of every TS code flow collection card 1 transmission are not disturbed mutually.
Harvester 201 connects PCI bridge 104 on the TS code flow collection card 1 by pci bus, gathers corresponding input code flow data, and will collect bit stream data PID number according to stream, and the code stream of input is divided into stream and table, and will flow and table sends to resolver 202.
Information such as the type that resolver 202 is gathered and calculating is flowed, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), maximum inter-packet gap, bandwidth, event count, information such as the type of collection and computational chart, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), largest segment interval, bandwidth, event count, program supplier, programm name, program category.And above-mentioned information sent to reporting device 205.
Information after reporting device 205 is resolved resolver 202 sends to host computer 4, many slave computers, and the reporting information that a plurality of reporting devices 205 among a plurality of slave computer CPU 2 that comprise send, sends in the host computer 4 its respective handling by switch 3.
Event monitoring device 203 among the slave computer CPU 2 is also monitored events corresponding.
The data message that event monitoring device 203 monitoring harvesters 201 collect, detect data PID number, and by identification to PID number, judge whether to be event data, be event data, then event data sent in the comparison device 204 event data is compared, meet definition incident, then comparison device 204 is sent to reporting device 205 with incident, reporting device 205 arrives host computer 4 with reporting events.
In the utility model the warning of performance, mistake, fault, secure context even user's operation all is defined as incident, event data has its specific PID number, when incident takes place they is write down and shows.
Host computer 4 each slave computers of inquiry have been seen the supreme data demand that send, in case timely reception data are arranged, shown, handle or store according to data character.
The incident of the utility model system is divided wide ranges, level is many, is easy to the user and in time carries out fault location and find out failure cause according to incident, is convenient to the user simultaneously and finds system's hidden danger, in time system is carried out maintenance and repair.
Simultaneously incident is divided into four ranks, the one-level incident only shows not record, and secondary event does not show only record (depositing the event log file in), and three grades show not only but also record that with the level Four incident the most serious level Four incident also can be carried out sound and light alarm.
The every group of ASI input interface 101 that with passage is the TS code flow collection card of slave computer is unit, and slave computer CPU 2 can also carry out following incident management and setting:
To any passage can be provided with every day begin stop the survey time and end stops the survey time.For example at night 1 generally do not need monitoring to 6 of mornings, begin to stop survey time and end and stop the survey time and just can be made as and 6 points respectively at 1.
A particular event is set, and its event count object (also can not establishing) as all tables and stream, promptly when a table or a this incident of stream generation, its event counter adds one, and when other incidents took place, its event counter was constant.This function with the period function be set be used, can reduce the quantity of event report, the generation of outstanding critical event, the incident be concerned about of user situation about distributing in each stream on top of again is beneficial to and analyzes and search problem.
Each incident that allows for each passage is provided with a period (1 to 99 second), also can not establish (put 0, promptly do not have markers and set).In the time period of setting, if the generation incident, then only when for the first time this incident taking place and the report when finishing of the period of this incident, when finishing, reports the period of this incident this incident total frequency in this period.
For each incident is provided with a starting switch, the user can start or closes monitoring to certain incident according to self needs.
The Event Description file is open to the user, and the user can be accustomed to write events explanation again by the understanding of oneself.
In order to prevent that program source from losing, occupied bandwidth overflows or the jitter value of inter-packet gap excessive (these all can cause the deterioration even the blank screen or noiseless of instability, image or the sound quality of system works), utilize template setting that the threshold value of bandwidth range and the minimum value that the inter-packet gap shake is allowed are set, so that can carry out code stream width monitoring and inter-packet gap shake time supervision during system monitoring, when the scope of bandwidth exceeds the threshold value of setting or when the inter-packet gap jitter value exceeded the time value of setting, system can produce events corresponding immediately.
Can deposit the above incident of secondary in journal file (file format is an EXCEL XLS form), and can syslog file and the specific database of user be docked according to user's requirement customization option.
Host computer 4 is the PC of standard configuration, and operating system is Win XP Professional.By demonstration and the storage of host computer 4 realizations to the slave computer monitoring situation.The design of host computer display frame fully takes into account the convenient of user and uses, and under the prerequisite that does not affect the appearance, each page info amount is big as far as possible, allows the user lack operation pages as far as possible.Homepage such as a corresponding slave computer just can monitor the leading indicator of this slave computer eight road inlet flows simultaneously, and can observe the failure condition of all other slave computers simultaneously.Host computer 4 is mainly used in Stateful Inspection, data record, fault alarm etc.
The LAN (Local Area Network) that connects host computer 4 and slave computer adopts Ethernet interface (EtherLink 10/100/1000Base-T), network conforms Ethernet full duplex IEEE 802.2 and IEEE 802.3 (10base-T), IEEE 802.3u (100BASE-TX), IEEE 802.3ab (1000BASE-T) industrial standard, the network connector specification is RJ-45.
Slave computer is mainly used in signal and gathers in real time and handle, and have ECM stream and break measuring ability, if ECM stream content stops to change or all will report to the police (if the user starts this incident) no longer appears in ECM stream, also have EIT and show each incident and begin the concluding time measuring ability, if the incident start and end time of current effective EIT table was not inconsistent warning (starting this incident as if the user) with the current time.
The course of work of DVB code stream monitoring system of the present utility model is:
Every slave computer is gathered the TS bit stream data of institute's monitoring target in real time, Devices to test is by one in the every group of ASI input interface 101 that connects TS code flow collection card 1, bit stream data is sent to FPGA plate 102, the packet length of the input code flow that FPGA plate 102 automatic identification ASI input interfaces 101 transmit, to remove greater than 204 bytes of 188 bytes or the follow-up unnecessary byte of 208 bytes, keeping 188 bytes transmits backward, the counter of FPGA plate 102 inside is counted the data volume of receiving, when data volume reaches certain value, bit stream data is sent into buffer storage 103 carry out buffer memory, send counter O reset after the data, count next time, the input code flow data are by buffer storage 103 buffer memorys, and be transferred in the harvester 201 among the slave computer CPU 2 by PCI bridge 104, harvester 201 is gathered corresponding input code flow data, and will collect the information such as PID number of bit stream data according to stream, flow point is stream and table, and will flow and table sends to resolver 202, the type of stream is gathered and calculated to resolver 202, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), maximum inter-packet gap, bandwidth, information such as event count are gathered the also type of computational chart, state, current code check, maximal rate, minimum code rate, maximum instantaneous code check (is unit with the millisecond), largest segment at interval, bandwidth, event count, the program supplier, programm name, information such as program category.And above-mentioned information sent to reporting device 205, information after reporting device 205 is resolved resolver 202 sends to host computer 4, host computer 4 is by the reporting device 205 of each slave computer of inquiry, seen the supreme data demand that send, in case timely reception data are arranged, shown, handled or stored according to data character, the reporting information that reporting device 205 sends,, be transferred in the host computer 4 its respective handling by switch 3.Event monitoring device 203 among the slave computer CPU 2 is also monitored events corresponding simultaneously, the data that event monitoring device 203 monitoring harvesters 201 collect, detect data PID number, and by identification to PID number, judge whether it is event data, if event data, then event data is sent in the comparison device 204 event data is compared, meet definition to incident, then comparison device 204 is sent to reporting device 205 with incident, reporting device 205 arrives host computer 4 with reporting events.Equally, host computer 4 has been seen the supreme data demand that send by the reporting device 205 of each slave computer of inquiry, in case timely reception data are arranged, is shown, handles or store according to data character.
The monitoring capacity that has solved the monitoring of separate unit slave computer by the designed DVB code stream monitoring system of the utility model is little, inconvenient problem, can make things convenient for, the key link at TV and Radio Service's (station) and CATV transmission and distribution network is provided with the monitoring point accurately and timely, broadcast television signal is monitored, capacity monitoring greatly, and every slave computer all adopts the TS code flow collection card to gather code stream, every TS code flow collection card comprises two ASI input interfaces, the passage of gathering is many, and cost is low and practical and convenient.
Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection range of claims of the present utility model.
Claims (5)
1. DVB code stream monitoring system, comprise slave computer, switch (3) and host computer (4), described slave computer connects described switch (3), and connect described host computer (4) by described switch (3), it is characterized in that described slave computer comprises at least one TS code flow collection card (1) and slave computer CPU (2);
Every described TS code flow collection card (1) comprises at least one group of ASI input interface (101), every group of ASI input interface (101) comprises at least one interface, every group of described ASI input interface (101) connects FPGA plate (102) respectively successively, buffer storage (103) and PCI bridge (104), the input code flow data are transferred to described FPGA plate (102) by ASI input interface (101) and carry out respective handling, and the code stream after by described buffer storage (103) described FPGA plate (102) being handled carries out buffer memory, and is transferred among the described slave computer CPU (2) by described PCI bridge (104);
The resolver (202) that described slave computer CPU (2) comprises harvester (201) and connects described harvester (201) with event monitoring device (203), be connected the comparison device (204) of described event monitoring device (203) and connect described resolver (202) and described compare device's (204) reporting device (205);
Described harvester (201) is gathered the code stream of described PCI bridge (104) input, and will collect code stream and be divided into stream and table;
Described resolver (202) receives stream and the table that described harvester (201) sends, and resolves;
Described event monitoring device (203) is monitored the data that described harvester (201) collects, and judges whether it is event data, is event data, then event data is sent in the comparison device (204);
Described comparison device (204) is compared event data, meets the definition to incident, then incident is sent to described reporting device (205);
The incident that information after described reporting device (205) is resolved described resolver (202) and described comparison device (204) send sends to host computer (4) by described switch (3).
2. DVB code stream monitoring system according to claim 1 is characterized in that, every described slave computer comprises four described TS code flow collection cards (1).
3. DVB code stream monitoring system according to claim 2 is characterized in that every described TS code flow collection card (1) comprises two groups of ASI input interfaces (101), and every group of ASI input interface (101) comprises two interfaces.
4. DVB code stream monitoring system according to claim 3 is characterized in that, described TS code flow collection card (1) is connected by pci bus with described slave computer CPU (2).
5. DVB code stream monitoring system according to claim 4 is characterized in that described slave computer connects described switch (3) by local area network (LAN).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920319030 CN201585083U (en) | 2009-12-30 | 2009-12-30 | DVB code stream monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200920319030 CN201585083U (en) | 2009-12-30 | 2009-12-30 | DVB code stream monitoring system |
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| CN201585083U true CN201585083U (en) | 2010-09-15 |
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| CN 200920319030 Expired - Lifetime CN201585083U (en) | 2009-12-30 | 2009-12-30 | DVB code stream monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595091A (en) * | 2012-03-20 | 2012-07-18 | 深圳市鼎盛威电子有限公司 | Transmission system and transmission method for serial digital interface (SDI) high-definition video signals |
| CN107257505A (en) * | 2016-09-19 | 2017-10-17 | 深圳创维数字技术有限公司 | A kind of method and system for preventing front end from changing digital television program code stream privately |
-
2009
- 2009-12-30 CN CN 200920319030 patent/CN201585083U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595091A (en) * | 2012-03-20 | 2012-07-18 | 深圳市鼎盛威电子有限公司 | Transmission system and transmission method for serial digital interface (SDI) high-definition video signals |
| CN107257505A (en) * | 2016-09-19 | 2017-10-17 | 深圳创维数字技术有限公司 | A kind of method and system for preventing front end from changing digital television program code stream privately |
| WO2018050018A1 (en) * | 2016-09-19 | 2018-03-22 | 深圳创维数字技术有限公司 | Method and system for detecting code stream of digital television program |
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