CN105721892B - A kind of the digital TV contents monitoring method and system of ground digital television single frequency network - Google Patents
A kind of the digital TV contents monitoring method and system of ground digital television single frequency network Download PDFInfo
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- CN105721892B CN105721892B CN201610080192.0A CN201610080192A CN105721892B CN 105721892 B CN105721892 B CN 105721892B CN 201610080192 A CN201610080192 A CN 201610080192A CN 105721892 B CN105721892 B CN 105721892B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2407—Monitoring of transmitted content, e.g. distribution time, number of downloads
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—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
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
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- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention relates to the digital TV contents monitoring methods and system of a kind of ground digital television single frequency network, by using Program Clock Reference PCR as time reference, content monitoring is carried out after carrying out hash calculating to the digital television program TS packet load of ground digital television single frequency network broadcast, the transmission bandwidth of a large amount of monitoring programme content passback can be saved while largely reducing artificial participation, to greatly increase the ability of digital TV contents monitoring, reduce system Construction cost and operation cost.
Description
Technical field
The present invention relates to a kind of content of TV program monitoring technology, and in particular to a kind of number of ground digital television single frequency network
Word television content monitoring method and system.
Background technique
Since digital television program is in the transmission of broadcast television transmissions net, ground digital television single frequency network front-end processing, ground
Digital television single-frequency network may occur during broadcasting error of transmission, by artificial change, by malicious attack situations such as.Cause
This, needs to be monitored the program broadcasted in each ground digital television single frequency network in the whole nation, to determine that broadcast TV program is
No normal broadcast.
Currently, monitoring system is generally made of monitoring front end and mechanism for monitoring transaction processing system, monitoring front end is deployed in
Each ground digital television single frequency network of various regions, mechanism for monitoring transaction processing system are generally deployed in mechanism for monitoring location.It is existing
There is the schematic diagram of ground digital television monitoring system as shown in Figure 1, monitoring front end is generally deployed in monitored broadcasting network covering
Region in, monitoring front end is responsible for acquiring the TS for the digital television program that monitor cable network is broadcasted, and progress TS system layer refers to
After mark monitoring, it is low bit-rate video stream (general transcoding is 1Mbps) monitored digital television program content transcode, then passes through
Private network passes back to the transaction processing system of regulatory agency；The transaction processing system of regulatory agency needs to replay these low bit- rates
Program, and whether gone wrong by the programme content of broadcast that staff's artificial judgment is monitored network.
Above-mentioned digital TV contents monitoring has the following problems: 1) due to needing to pass through private network after recompiling program
The transaction processing system of mechanism for monitoring is passed back to from place remote, even if largely being compressed, a general program from
One radio and television radio network passes back to the transmission bandwidth that mechanism for monitoring needs 1Mbps or so.With " central broadcast TV programme without
For the ground digital television single frequency network that line digitlization covering engineering " is built, if mechanism for monitoring is needed to 10 DTVs
Program is monitored in the broadcast situation of a ground transmission station transmitting broadcast in the whole nation more than 3000, then needs 10 × 3000 × 1Mbps
The transmission bandwidth of=30Gbps.Therefore, existing content monitoring system needs to occupy biggish network bandwidth, provides in network bandwidth
Monitoring capability is very limited in the limited situation in source.Even if 2) do not consider the limitation of transmission bandwidth, mechanism for monitoring is also required to
Artificial or program auxiliary judges these encoded videos: whether this 10 × 3000=30000 real-time video occurs
Whether whether error of transmission, programme content occur artificially changes, occurs for program malicious attack situation, this will be expended largely
Manpower and computing resource.
Our previous application CN201510560336.8 needs in such a way that the PTS that PES is carried participates in monitoring
The hashed value and its pts value that program PES is transmitted between monitoring station and mechanism for monitoring, since the PTS of video PES is not linearly to increase
It is long, but determined according to the type of frame where PTS, than (n+1)th PTS of possible n-th of PTS is big；And a TS stream has
Multiple programs, 5~6 programs can be transmitted by having in a TS stream in general in received terrestrial digital broadcasting, each program needs
Transmit video and audio, it is assumed that the interval of video and the PTS of audio are respectively 40ms, and a TS flows one second PTS for needing to transmit
Value needs 6*2*25, if the summary information of the load of each PES requires transmission, needs to transmit within one second 6*2*25
Summary data, if too many flow can be expended using mobile Internet transmission of monitoring data.It can be seen that earlier application
Although reducing a large amount of transmission data compared with traditional monitoring method, data volume is still for mobile Internet
It is bigger.
In addition, since transmitting website is numerous, and being distributed extensively, being distributed in wide more for digital terrestrial television single frequency network
Large village area becomes monitoring data using the higher cost of private network transmission of monitoring data, therefore using mobile Internet transmission
Important selection.But transmitted data amount in the scheme of earlier application or bigger, is not suitable for using mobile Internet conduct
Information delivery media.
Applicant have observed that cable network is needed to demultiplex program, is multiplexed, encryption, lead to TS layers of program letter
Breath is changed, and PCR is changed in especially TS stream, and each transmitting website is required in ground digital television single frequency network
The TS of broadcast is the same, and the program PCR in TS that each transmitting station's point broadcasts is consistent, meanwhile, the PCR of program exists
It is linear increase, only when PCR counter overflow resets, becomes 0 from maximum value.Therefore, it is necessary to study out one
Kind is suitable for the television content monitoring scheme of ground digital television single frequency network.
Summary of the invention
It is larger using the data volume of mobile Internet transmission of monitoring data in order to solve existing digital terrestrial television single frequency network
The problem of, the invention proposes the digital TV contents monitoring method and system of a kind of ground digital television single frequency network, by with
Program Clock Reference PCR is time reference, to the digital television program TS packet in the TS stream of ground digital television single frequency network broadcast
Load carries out carrying out content monitoring after hash calculating, can save the transmission bandwidth, simultaneously of a large amount of monitoring program data passback
Largely reduce artificial participation, thus greatly increase digital TV contents monitoring ability, reduce system Construction cost and operation at
This.
A kind of digital TV contents monitoring method of ground digital television single frequency network proposed by the present invention, this method include with
Lower step:
Step 1: selecting a ground launch website in ground digital television single frequency network for reference to monitored network, deployment
With reference to monitoring station, the terrestrial broadcast networks of other transmitting websites that need to be monitored in the same digital terrestrial television single frequency network are
Monitored network, disposes monitoring station；
Step 2: in reference monitoring station, receiving the TS stream comprising monitored program, choose the section of a program in TS stream
Mesh reference clock PCR is referred to as common clock, is formed by discrete time point as time reference using program PCR, is set one
A time interval, the time interval of the setting are greater than the time interval that PCR occurs；
PCR to obtain when starting and calculating searches first PCR occurred after the time interval of setting for starting PCR, should
First PCR is to terminate PCR, calculates starting PCR and the content for terminating the TS packet of all programs between PCR, obtains
TS packet abstract；Then TS packet digest calculations step above-mentioned is repeated, the TS packet of calculating is plucked again to terminate PCR as new starting PCR
It exports to carry out subsequent processing；
In monitoring station, monitored TS stream is received, and is cached in the storage equipment of monitoring station；
Step 3: define TS packet summary information, at least there are three elements for the TS packet summary information: one makes a summary for TS packet, and two
To calculate the starting PCR of TS packet abstract and terminating PCR, three labels flowed for TS；
Step 4: in reference monitoring station, the TS packet that step 2 calculates being made a summary and is formed in the way of step 3 with reference to monitoring
Website TS packet summary information；
Step 5: being sent to all monitoring stations monitoring station TS packet summary information is referred to reference to monitoring station；
Step 6: monitoring station is received with reference to after monitoring station TS packet summary information, is plucked according to reference monitoring station TS packet
The starting PCR provided in message is provided and terminates PCR, searches corresponding starting in the TS cached in monitoring station storage equipment
PCR and the algorithm for terminating PCR, and being made a summary with calculating identical in step 2 to starting PCR and terminate all sections between PCR
Mesh TS packet content calculates TS packet abstract；
Step 7: the reference monitoring station TS whether the TS packet abstract calculated in comparison step 6 sends with reference monitoring station
TS packet abstract is identical in packet summary information, and mistake occurs in broadcasting process if it is not the same, being then monitored program；If identical,
Then the content of the TS packet of the program of monitoring station broadcast is consistent with reference to the content of TS packet of monitoring station.
Further, in step 2, the algorithm for calculating abstract is hashing algorithm, and TS packet abstract refers to a series of TS packet
Carry out the hashed value that hash is calculated.
Further, label described in step 3 is ID.
Further, it in step 5, is sent with reference to monitoring station TS packet summary information by IP network.
Further, which is private network or mobile Internet.
Further, in step 5, unified disappear is sent by reference monitoring station TS packet summary information with reference to monitoring station
Then breath center is forwarded to each monitoring station by message center.
The invention also provides a kind of digital TV contents of ground digital television single frequency network to monitor system, the system packet
It includes:
It selects and deployment module: selecting a ground launch website in ground digital television single frequency network for reference to monitored
Network, deployment refer to monitoring station, the ground of other transmitting websites that need to be monitored in the same digital terrestrial television single frequency network
Broadcasting network is monitored network, disposes monitoring station；
Reception and computing module: it in reference monitoring station, receives the TS comprising monitored program and flows, one in selection TS stream
The Program Clock Reference PCR of program is referred to as common clock, is formed by discrete time point using program PCR and is joined as the time
It examines, sets a time interval, the time interval of the setting is greater than the time interval that PCR occurs；With what is obtained when starting and calculating
PCR is starting PCR, searches first PCR occurred behind setting time interval, which is to terminate PCR, to starting PCR
It is calculated with the content for terminating the TS packet of all programs between PCR, obtains TS packet abstract；It then to terminate PCR is again new
PCR is originated, TS packet digest calculations step above-mentioned is repeated, the TS packet abstract of calculating is output to TS packet summary information and forms module；
In monitoring station, monitored TS stream is received, and is cached in the storage equipment of monitoring station；
TS packet summary information definition module: TS packet summary information is defined, at least there are three elements for the TS packet summary information:
One is TS packet abstract, and two be to calculate the starting PCR of TS packet abstract and terminate PCR, and three be the labels of TS stream；
TS packet summary information forms module: in reference monitoring station, the TS packet abstract received and computing module calculates being pressed
It is formed according to the mode that TS packet summary information definition module defines with reference to monitoring station TS packet summary information；
TS packet summary information sending module: all monitoring stations will be sent to reference to monitoring station TS packet summary information；
Lookup and computing module: monitoring station is received with reference to after monitoring station TS packet summary information, is monitored according to reference
Phase is searched in the starting PCR and end PCR provided in website TS packet summary information, the TS cached in monitoring station storage equipment
The starting PCR that answers and terminate PCR, and with receive and computing module used by calculate the algorithm of abstract to originating PCR and knot
All program TS packet contents calculate TS packet abstract between beam PCR；
Judgment module: compare TS packet abstract that lookup and computing module calculate whether the reference with the transmission of reference monitoring station
TS packet abstract is identical in monitoring station TS packet summary information, and mistake occurs in broadcasting process if it is not the same, being then monitored program；
If identical, the content of the TS packet of the program of monitoring station broadcast is consistent with reference to the content of TS packet of monitoring station.
Further, it is sent with reference to monitoring station TS packet summary information by IP network.
Further, which is private network or mobile Internet.
Further, unified message center is sent by reference monitoring station TS packet summary information with reference to monitoring station,
Then each monitoring station is forwarded to by message center.
Beneficial effects of the present invention:
1. the number of the invention by broadcasting ground digital television single frequency network using Program Clock Reference PCR as time reference
The load of word TV programme TS packet carries out content monitoring after carrying out hash calculating, saves the transmission of a large amount of monitoring programme content passback
Bandwidth largely reduces artificial participation simultaneously, to greatly increase the ability of digital TV contents monitoring, reduce system Construction cost
And operation cost, it is particularly suitable for mobile monitoring, while using mobile network as information delivery media.
2. proposed by the present invention calculate separately in a period of time TS stream received with reference to monitoring station and monitoring station
TS packet abstract, and to the method that the abstract of calculating is compared, two corresponding TS can be compared without transmission TS stream by solving
Stream whether equal problem.
Detailed description of the invention
Fig. 1 is the schematic diagram of existing ground digital television monitoring system.
Fig. 2 is the digital TV contents monitoring method of ground digital television single frequency network proposed by the present invention.
Fig. 3 is the digital TV contents monitoring system of ground digital television single frequency network proposed by the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.But as known to those skilled in the art, the invention is not limited to attached drawings and following reality
Apply example.
The digital TV contents monitoring method of ground digital television single frequency network proposed by the present invention is as shown in Figure 2.This method
The following steps are included:
Step 1: selecting a ground launch website for reference to monitored network, deployment refers to monitoring station, same number
The terrestrial broadcast networks of other transmitting websites that need to be monitored in word terrestrial television single frequency network are monitored network, dispose monitoring station
Point；Monitoring station or monitoring station can be referred in transmitting site deployment, portion at posterior nodal point can also be handled to single frequency network video
Administration refers to monitoring station or monitoring station；
Digital television program encodes by video and audio compress and to form coding, multiplexing forms transport stream (TS).It is every in TS
One digital television program all has a Program Clock Reference (PCR), resolution ratio 27MHz.PCR is encapsulated in the adaptation of TS packet
In domain, GB/T17975-1 requires the interval PCR of a program to should not exceed 100 milliseconds, in actual broadcast television system between PCR
Every generally less than 40 milliseconds；
Step 2: in reference monitoring station, receiving the TS stream comprising monitored program, choose the section of a program in TS stream
Mesh reference clock PCR is referred to as common clock, using the PCR of the program as a series of discrete reference time point (according to phase
Pass standard, the time interval that PCR occurs in broadcast system should not exceed 40ms), setting one time interval than PCR appearance
Big time interval, such as 1 second；
In reference monitoring station, starting the PCR obtained when calculating is PCR0, first occurred behind lookup setting time interval
A PCR, it is assumed that it is PCR25, the content of the TS packet of programs all between PCR0 and PCR25 is calculated, obtains TS packet abstract,
If starting PCR, PCR25 that PCR0 is abstract are to terminate PCR；Then with end PCR above-mentioned for new starting PCR, lookup is set
Fix time first PCR occurred after being spaced, as new end PCR, to institute between new starting PCR and new end PCR
There is the content of program TS packet to be calculated, obtains TS packet abstract；TS packet digest calculations step above-mentioned is so repeated always, and will
The TS packet abstract of calculating is output to subsequent step；Hashing algorithm can be used in the digest calculations, and TS packet abstract refers to one at this time
The TS packet of series carries out the hashed value that hash is calculated；
In monitoring station, monitored TS stream is received, and is cached in the storage equipment of monitoring station；
Step 3: define TS packet summary information, at least there are three elements for the TS packet summary information: one makes a summary for TS packet, and two
To calculate the starting PCR of TS packet abstract and terminating PCR, three labels flowed for TS, example is marked as mentioned as ID；
Step 4: in reference monitoring station, the TS packet that step 2 calculates being made a summary and is formed in the way of step 3 with reference to monitoring
Website TS packet summary information；
Step 5: being sent to all monitoring stations monitoring station TS packet summary information is referred to reference to monitoring station；
Step 6: monitoring station is received with reference to after monitoring station TS packet summary information, is plucked according to reference monitoring station TS packet
The starting PCR provided in message is provided and terminates PCR, searches corresponding starting in the TS cached in monitoring station storage equipment
PCR and the algorithm for terminating PCR, and being made a summary with calculating identical in step 2 to starting PCR and terminate all sections between PCR
Mesh TS packet content calculates TS packet abstract；
Step 7: the reference monitoring station TS whether the TS packet abstract calculated in comparison step 6 sends with reference monitoring station
TS packet abstract is identical in packet summary information, occurs if it is not the same, being then monitored program in cable tv broadcast net broadcasting process
Mistake；If identical, the content of the TS packet of the program of cable tv broadcast net broadcast and reference are supervised where the monitoring station
The content of the TS packet of survey station point is consistent.
Wherein, in step 5, with reference to monitoring station TS packet summary information by IP network transmit, the IP network be private network or
Mobile Internet, alternatively, sending unified message center for reference monitoring station TS packet summary information with reference to monitoring station, so
Each monitoring station is forwarded to by message center afterwards.
In the above-mentioned methods, due in ground digital single frequency network, it is desirable that the program TS of broadcast is flowed in radio and television radio network
Processing, radio and television radio network broadcasting process in without change TS stream in content.Hence, it can be determined that a monitored ground
The terrestrial broadcast networks of surface launching website make reference monitored network, and the terrestrial broadcast networks of other transmitting websites that need to be monitored are
Monitored network.Can whether monitored with reference by comparing the TS stream of monitored network transmission/broadcast digital TV program
Whether the corresponding TS stream of network transmission/broadcast digital television program is identical, so that it may determine digital television program monitored
Whether Web broadcast/transmission programme content is identical as with reference to monitored transmission/broadcast programme content of network；If phase
Together, as long as concentrating human resources and computing resource monitoring with reference to the digital TV contents of monitored network transmission/broadcast, no
With the DTV section for using a large amount of human resources, bandwidth resources and computing resource to broadcast all radio and television broadcasting networks
Mesh content is monitored.
In the present invention, receiving and the monitoring system monitored with reference to monitored network is defined as connecing with reference to monitoring station
It receives and the monitoring system for monitoring other monitored networks defines monitoring station.
In addition, since it is desired that the digital television program of multiple radio and television broadcasting network broadcast is monitored simultaneously, if directly
Compare monitoring station and the load with reference to monitored website TS packet, needs to receive the TS of monitored digital program in monitoring station
Stream, and TS stream ratio coming, with reference to the received monitored digital television program of monitoring station is pushed with from reference monitoring station
Compared with this needs more large transmission bandwidth.For this problem, the invention proposes calculate separately to connect with reference to monitoring station and monitoring station
The TS packet abstract in a period of time TS stream received, and to the method that the abstract of calculating is compared, specifically: in reference monitoring
Website and monitoring station receive the TS of monitored digital television program respectively, and by a hashing algorithm respectively to receiving
TS stream in a period of time TS packet make a summary, calculating the abstract of a regular length, (hashing algorithm difference length of summarization can also
Can be different, if the MD5 length of summarization for being is 16 bytes), if the middle TS packet abstract of two sections of TS streams is identical, it can determine this
The two TS streams are identical for a period of time.Therefore, TS in one section of TS stream is transmitted between monitoring station and reference monitoring station
Packet abstract, it is whether identical by comparison abstract, that is, it can determine monitoring station and the programme content monitored with reference to monitoring station be
It is no identical；And the summary data length loaded is fixed, and data volume is few compared to TS stream very much: being calculated according to PCR of setting number.
Assuming that the TS stream bit rate of program is 20Mbps, it is assumed that the interval of calculating are as follows: calculate the abstract of TS stream every 20 PCR, i.e.,
This period of time, the PCR of a program occur 20 times, abstract are calculated to the TS packet in this period of time, then to a lower section
Time calculates abstract and PCR occurs 20 times.Considering there are multiple programs in a TS stream, each program has the PCR of oneself,
Therefore it needs to be determined that a program, PCR, which is used as, divides the period.
For synchronization, monitoring station is received with reference to after the first summary information of monitoring station, according to the PCR's of summary information
Cut-point synchronizes calculating.
The present invention chooses the PCR of one of program by a TS stream in whole monitoring ground digital television single frequency network
As label, the program TS packet abstract in the interval of program PCR is calculated, this counting period may include 0 to multiple PCR.
Thus a TS only transmits an abstract, and calculates the starting PCR of abstract and terminate the value of PCR.Assuming that calculating abstract
It is set to 1 second (the case where according to selected program PCR, it is also possible to bigger about 1 second), then only transmits an abstract in one second
Data and 2 PCR datas.Compared to based on the PES method in PTS, greatly reduce required flow, be very suitable to using
Mobile Internet is monitored, and is relied on to reduce expensive private network.
Scheme through the invention, it is only necessary to entire TS can be flowed and be carried out using the PCR of a digital television program
Monitoring, dramatically saves bandwidth in this way, is particularly suitable for mobile monitoring, while using mobile network as information delivery media.
The digital TV contents monitoring system of ground digital television single frequency network proposed by the present invention is as shown in Figure 3.The system
It comprises the following modules:
It selects and deployment module: selecting a ground launch website for reference to monitored network, deployment refers to monitoring station,
The terrestrial broadcast networks of other transmitting websites that need to be monitored in the same digital terrestrial television single frequency network are monitored network, portion
Affix one's name to monitoring station；Monitoring station or monitoring station can be referred in transmitting site deployment, after can also handling single frequency network video
Deployment refers to monitoring station or monitoring station at node；
Digital television program encodes by video and audio compress and to form coding, multiplexing forms transport stream (TS).It is every in TS
One digital television program all has a Program Clock Reference (PCR), resolution ratio 27MHz.PCR is encapsulated in the adaptation of TS packet
In domain, GB/T17975-1 requires the interval PCR of a program to should not exceed 100 milliseconds, in actual broadcast television system between PCR
Every generally less than 40 milliseconds；
Reception and computing module: it in reference monitoring station, receives the TS comprising monitored program and flows, one in selection TS stream
The Program Clock Reference PCR of program is referred to as common clock, using the PCR of the program as a series of discrete reference time point
(according to relevant criterion, the time interval that PCR occurs in broadcast system should not exceed 40ms), setting one than PCR appearance
The big time interval of time interval, such as 1 second；In reference monitoring station, starting the PCR obtained when calculating is PCR0, and lookup is set
Fix time first PCR occurred after being spaced, it is assumed that is PCR25, to the content meter of program TS packets all between PCR0 and PCR25
Abstract is calculated, if starting PCR, PCR25 that PCR0 is abstract are to terminate PCR；Then with end PCR above-mentioned for new starting PCR,
First PCR occurred behind setting time interval is searched, as new end PCR, to new starting PCR and new end PCR
Between the contents of TS packet of all programs calculated, obtain TS packet abstract；TS packet digest calculations above-mentioned are so repeated always
Step, and the TS packet of calculating abstract is output to TS packet summary information and forms module；Hashing algorithm can be used in the digest calculations,
TS packet abstract, which refers to, at this time carries out the hashed value that hash is calculated to a series of TS packet；In monitoring station, receive monitored
TS stream, and be cached in the storage equipment of monitoring station；
TS packet summary information definition module: TS packet summary information is defined, at least there are three elements for the TS packet summary information:
One is TS packet abstract, and two be to calculate the starting PCR of TS packet abstract and terminate PCR, and three be the labels of TS stream, and example is marked as mentioned
It is denoted as transport stream ID；
TS packet summary information forms module: in reference monitoring station, the TS packet abstract received and computing module calculates being pressed
It is formed according to the mode that TS packet summary information definition module defines with reference to monitoring station TS packet summary information；
TS packet summary information sending module: all being sent to reference to monitoring station TS packet summary information with reference to monitoring station
Monitoring station, TS packet summary information can be transmitted by IP network, but be not limited to IP network；It can also be with reference to monitoring station
TS packet summary information is sent to a unified message center, is then forwarded to each monitoring station by message center；
Lookup and computing module: monitoring station is received with reference to after monitoring station TS packet summary information, is monitored according to reference
Phase is searched in the starting PCR and end PCR provided in website TS packet summary information, the TS cached in monitoring station storage equipment
The starting PCR that answers and terminate PCR, and with receive and computing module used by calculate the algorithm of abstract to originating PCR and knot
All program TS packet contents calculate TS packet abstract between beam PCR；
Compare and judgment module: comparing lookup and TS packet abstract that computing module calculates whether with the transmission of reference monitoring station
Reference monitoring station TS packet summary information in TS packet abstract it is identical, if it is not the same, then be monitored program it is wide in cable television
It broadcasts net broadcasting process and mistake occurs；If identical, the TS of the program of cable tv broadcast net broadcast where the monitoring station
The content of packet is consistent with reference to the content of TS packet of monitoring station.
The other content of the system can refer to the content of method above-mentioned, and details are not described herein.
More than, embodiments of the present invention are illustrated.But the present invention is not limited to above embodiment.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (6)
1. a kind of digital TV contents monitoring method of ground digital television single frequency network, which is characterized in that this method includes following
Step:
Step 1: selecting a ground launch website in ground digital television single frequency network for reference to monitored network, deployment reference
Monitoring station, the terrestrial broadcast networks of other transmitting websites that need to be monitored in the same ground digital television single frequency network are to be supervised
Survey grid network disposes monitoring station；
Step 2: in reference monitoring station, receiving the TS stream comprising monitored program, choose the program ginseng of a program in TS stream
It examines clock PCR to refer to as common clock, discrete time point is formed by as time reference, when setting one using program PCR
Between be spaced, the time interval of the setting is greater than the time interval that PCR occurs；It is starting PCR with the PCR obtained when starting and calculating,
First PCR occurred behind setting time interval is searched, which is to terminate PCR, to starting PCR and is terminated between PCR
The content of the TS packet of all programs is calculated, and TS packet abstract is obtained；Then again to terminate PCR for new starting PCR, before repeating
The TS packet digest calculations step stated, the TS packet abstract output of calculating is to carry out subsequent processing；In monitoring station, receive monitored
TS stream, and be cached in the storage equipment of monitoring station；
Step 3: define TS packet summary information, at least there are three elements for the TS packet summary information: one makes a summary for TS packet, and two be meter
It calculates the starting PCR of TS abstract and terminates PCR, three labels flowed for TS；
Step 4: in reference monitoring station, the TS packet that step 2 calculates being made a summary and is formed in the way of step 3 with reference to monitoring station
TS packet summary information；
Step 5: being sent to all monitoring stations monitoring station TS packet summary information is referred to reference to monitoring station；
Step 6: monitoring station is received with reference to after monitoring station TS packet summary information, is disappeared according to reference monitoring station TS packet abstract
The starting PCR provided in breath and end PCR stores lookup in the TS stream cached in equipment in monitoring station and originates PCR accordingly
With terminate PCR, and in step 2 it is identical calculate abstract algorithm to starting PCR and terminate PCR between all program TS
Packet content calculates TS packet abstract；
Step 7: the reference monitoring station TS packet whether the TS packet abstract calculated in comparison step 6 sends with reference monitoring station is plucked
It wants TS packet abstract in message identical, mistake occurs in broadcasting process if it is not the same, being then monitored program；It, should if identical
The content of the TS packet of the program of monitoring station broadcast is consistent with reference to the content of TS packet of monitoring station；
In step 5, sent with reference to monitoring station TS packet summary information by IP network, the IP network includes mobile Internet；
Alternatively, unified message center is sent by reference monitoring station TS packet summary information with reference to monitoring station, then by message
The heart is forwarded to each monitoring station.
2. the method according to claim 1, wherein the algorithm for calculating abstract is hashing algorithm, TS in step 2
Packet abstract, which refers to, carries out the hashed value that hash is calculated to a series of TS packet.
3. the method according to claim 1, wherein the label is ID in step 3.
4. the method according to claim 1, wherein the IP network further includes private network.
5. the digital TV contents of ground digital television single frequency network a kind of monitor system, which is characterized in that the system includes:
It selects and deployment module: selecting a ground launch website in ground digital television single frequency network for reference to monitored net
Network, deployment refer to monitoring station, and the ground of other transmitting websites that need to be monitored in the same ground digital television single frequency network is wide
Broadcasting network is monitored network, disposes monitoring station；
Reception and computing module: in reference monitoring station, the TS stream comprising monitored program, a program in selection TS stream are received
Program Clock Reference PCR as common clock refer to, discrete time point is formed by as time reference using program PCR, if
A fixed time interval, the time interval of the setting are greater than the time interval that PCR occurs；It is with the PCR obtained when starting and calculating
PCR is originated, searches first PCR occurred behind setting time interval, which is to terminate PCR, to starting PCR and knot
The content of the TS packet of all programs is calculated between beam PCR, obtains TS packet abstract；Then again to terminate PCR as new starting
PCR, repeats TS packet digest calculations step above-mentioned, and the TS packet abstract of calculating is output to TS packet summary information and forms module；It is supervising
Survey station point receives monitored TS stream, and is cached in the storage equipment of monitoring station；
TS packet summary information definition module: TS packet summary information is defined, at least there are three elements for the TS packet summary information: one is
TS packet abstract, two be the starting PCR and end PCR of calculating TS packet abstract, three labels flowed for TS；
TS packet summary information forms module: in reference monitoring station, the TS packet received and computing module calculates being made a summary according to TS
The mode that packet summary information definition module defines is formed with reference to monitoring station TS packet summary information；
TS packet summary information sending module: all monitoring stations will be sent to reference to monitoring station TS packet summary information；With reference to prison
Survey station point TS packet summary information is sent by IP network, and the IP network includes mobile Internet；Alternatively, will with reference to monitoring station
It is sent to unified message center with reference to monitoring station TS packet summary information, each monitoring station is then forwarded to by message center
Point；
Search and computing module: monitoring station is received with reference to after monitoring station TS packet summary information, according to reference monitoring station
It is corresponding to store lookup in the TS stream cached in equipment in monitoring station by the starting PCR and end PCR provided in TS packet summary information
Starting PCR and terminate PCR, and with receive and computing module used by calculate the algorithm of abstract to originating PCR and end
All program TS packet contents calculate TS packet abstract between PCR；
Judgment module: whether the TS packet abstract for comparing lookup and computing module calculating monitors with the reference that reference monitoring station is sent
TS packet abstract is identical in website TS packet summary information, and mistake occurs in broadcasting process if it is not the same, being then monitored program；If
Identical, then the content of the TS packet of the program of monitoring station broadcast is consistent with reference to the content of TS packet of monitoring station.
6. system according to claim 5, which is characterized in that the IP network further includes private network.
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