CN101938582B - Digital audio monitor, monitoring method and monitoring system - Google Patents
Digital audio monitor, monitoring method and monitoring system Download PDFInfo
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Abstract
The invention provides a digital audio monitor, a digital audio monitoring method and a digital audio monitoring system. The digital audio monitor comprises an audio decoding module and a VOIP coding module, wherein the audio decoding module is used for extracting an audio signal corresponding to audio program information monitored according to user requests from a digital television network, and decoding the extracted audio signal; and the VOIP coding module is used for carrying out VOIP coding on the audio signal subjected to decoding processing by the audio decoding module, and outputting the audio signal subjected to coding processing. The digital audio monitor, the digital audio monitoring method and the digital audio monitoring system of the invention can realize remote digital audio surveillance, raise the efficiency of network maintenance, help to prevent illegal audio signals from intruding HFC networks, and improve the network maintenance efficiency of a digital television.
Description
Technical field
The present invention relates to the digital audio monitoring technical field, relate in particular to a kind of digital audio monitor, a kind of digital audio monitoring method and a kind of digital audio monitoring system.
Background technology
Along with day by day popularizing and vast application of cable TV especially Digital Television, hfc plant (Hybrid Fiber Coaxial Cable, the Hybrid Fiber Coaxial network) the transmission of data capacity is large, network architecture low cost and other advantages owing to having, and has become the digital television transmission the most ripe in the prior art, that popularity is the highest.
For guaranteeing the transmission quality of digital television signal, need to monitor each transmission node of described hfc plant, common monitoring mainly is the monitoring to vision signal, yet while transmission video signal and audio signal in the hfc plant, and lack monitoring means to the audio signal of hfc plant in the prior art, therefore, the audio frequency of can only be regularly monitoring top box of digital machine in the user family is proper mass also.But such monitoring method is because can't carry out remote monitoring, it is convenient not to use, and can not obtain at any time the voice data that transmits on the described hfc plant, can't the described hfc plant of Real-Time Monitoring whether be subject to illegal audio signal invasion, can not specifically judge the audio signal distortion of which node on the hfc plant.
Summary of the invention
For the defective that the digital audio monitoring method of prior art can't be carried out remote monitoring, the technical problem to be solved in the present invention is to provide a kind of digital audio monitor that can realize remote monitoring.Described digital audio monitor can be realized the audio program remote monitoring to each node of described hfc plant, improves the efficient of network operation, helps to prevent that illegal audio signal is to the invasion of hfc plant.
A kind of digital audio monitor, comprise: audio decoder module and VOIP coding module, described audio decoder module is used for extracting corresponding audio signal according to the audio program information that the user asks to monitor from digital TV network, and the described audio signal decoding to extracting, from described audio signal, extract the user and carry out the audio signal that audio frequency is monitored needed band segment; Described VOIP coding module is used for the audio signal after the described audio decoder module decoding processing is carried out the VOIP coding, and the described audio signal after the output encoder processing.
In the digital audio monitor of the present invention, described audio decoder module is to extracting corresponding audio signal decoding from described digital TV network, by described VOIP coding module described audio signal is carried out the output of VOIP coding again, then the audio signal of output can be made remote transmission at the IP data network, realizes the digital audio monitoring of far-end.Described digital audio monitor of the present invention connects each network node of described hfc plant, can monitor in real time the audio signal of each node transmission, when fault occurs, can monitor more quickly and obtain, therefore can improve the efficient that digital TV network is safeguarded.
For the defective that the digital audio monitoring method of prior art can't be carried out remote monitoring, the technical problem to be solved in the present invention also is to provide a kind of digital audio monitoring system that can realize remote monitoring.
A kind of digital TV network audio frequency monitoring system comprises: server and digital audio monitor; Described server is used for receiving user's dialing instruction and the audio program information that request is monitored, and searches corresponding digital audio monitor according to described dialing instruction, and described audio program information is sent to corresponding described digital audio monitor; Receive the audio signal of described digital audio monitor monitoring; Described digital audio monitor comprises: be used for extracting corresponding audio signal according to described audio program information from digital TV network, and to described audio signal decoding, from described audio signal, extract the user and carry out the audio decoder module that audio frequency is monitored the audio signal of needed band segment; And, be used for the decoded described audio signal of described audio decoder module is carried out the VOIP coding, and the described audio signal after will encoding is sent to the VOIP coding module of described server.
Be provided with described digital audio monitor in the digital audio monitoring system of the present invention, wherein said audio decoder module is extracted corresponding audio signal and is carried out decoding from described digital TV network, by described VOIP coding module described audio signal is carried out the output of VOIP coding again, the data volume of the audio signal of then exporting is less and can make remote transmission at the IP data network, realizes the digital audio monitoring of far-end.Described digital audio monitor is connected on each network node of described hfc plant, by described server each described digital audio monitor is carried out dial-up connection, can Real-Time Monitoring the audio signal of each described network node transmission, when fault occurs, can monitor more quickly and obtain, and can judge the position of the network node that breaks down, improve the efficient that digital TV network is safeguarded.
For the defective that the digital audio monitoring method of prior art can't be carried out remote monitoring, the technical problem to be solved in the present invention also is to provide a kind of digital audio monitoring method that can realize remote monitoring.
A kind of digital audio monitoring method may further comprise the steps:
Receive the user by server and ask the network node information of monitoring, and according to network node corresponding to institute's network node information search;
Receive the user by described server and ask the audio program information of monitoring, extract corresponding audio signal according to described audio program information from described network node;
And the described audio signal of extracting decoded, from described audio signal, extract the user and carry out the audio signal that audio frequency is monitored needed band segment;
Decoded described audio signal is carried out the VOIP coding, and the described audio signal after will encoding is sent to described server.
In the digital audio monitoring method of the present invention, can long-range reception user ask network node information and the audio program information of monitoring by described server, from described digital TV network, extract corresponding audio signal and carry out decoding, again described audio signal is carried out returning described server behind the VOIP coding, monitor for the user.Because the data volume of the audio signal in the described server is less and can make remote transmission at the IP data network, so can realize the digital audio monitoring of far-end.And can monitor in real time the audio signal situation of each network node transmission of described digital TV network by accessing described server, when fault occurs, can monitor more quickly and obtain, and can judge the position of the network node that breaks down, improve the efficient that digital TV network is safeguarded.
Description of drawings
Fig. 1 is the structural representation of digital audio monitoring system of the present invention;
Fig. 2 is the structural representation of digital audio monitor of the present invention;
Fig. 3 is the structural representation of a kind of preferred implementation of digital audio monitor of the present invention;
Fig. 4 is the operation principle schematic diagram of a kind of monitoring mode of digital audio monitoring system of the present invention
Fig. 5 is the operation principle schematic diagram of the another kind of monitoring mode of digital audio monitoring system of the present invention;
Fig. 6 is the flow chart of steps of digital audio monitoring method of the present invention.
Embodiment
See also Fig. 1, Fig. 1 is the structural representation of digital audio monitoring system of the present invention.
Described digital audio monitoring system 10 comprises server 110 and several digital audio monitors 120, connects by the IP data network between described server 110 and each the described digital audio monitor 120.
Described server 110 is used for receiving user's dialing instruction and the audio program information that request is monitored, and searches corresponding digital audio monitor according to described dialing instruction, and described audio program information is sent to corresponding described digital audio monitor 120.Wherein, described audio program information can be by TSID(transport stream id flow transmission number) and Audio PID (audio frequency PID) form, it is mainly used in the channel of the audio program of designated user request monitoring.
As a kind of concrete implementation, each described digital audio monitor 120 is all preserved network address information separately in described server 110.The observer can ask described server 110 by IP data network or the receiving of VOIP direct network, perhaps access described server 110 by telephone network, described server 110 is sent described dialing instruction, wherein, the record user asks to carry out the described digital audio monitor 120 of monitoring operation or the network node information of correspondence in the described dialing instruction.Described server 110 is searched described network address information according to described dialing instruction, described digital audio monitor 120 to correspondence sends communication request, send confirmation after corresponding described digital audio monitor 120 receives described communication request, beginning is carried out data interaction with described server 110.
After 120 dialing were finished to described digital audio monitor, described server 110 received users and asks the audio program information of monitoring, and described audio program information is sent to corresponding described digital audio monitor 120.
See also Fig. 2 and Fig. 3, Fig. 2 is the structural representation of digital audio monitor of the present invention, and Fig. 3 is the structural representation of a kind of preferred implementation of digital audio monitor of the present invention.
Described digital audio monitor 120 can connect respectively each network node of described digital TV network, audio signal to each described node transmission is monitored, wherein, described network node comprises outdoor digital TV network node and the digital TV set-top box in the user family.
Described digital audio monitor 120 comprises audio decoder module 121 and VOIP coding module 122.
After described digital audio monitor 120 receives the audio program information of described server 110 transmissions, described audio decoder module 121 is wherein extracted the audio signal corresponding with described audio program information according to described audio program information from described digital TV network node, and to described audio signal decoding, because the tonequality of the high definition audio signal that transmits in the digital TV network is had relatively high expectations, so its data volume is larger, be inconvenient to carry out remote transmission of monitoring, by 121 pairs of described audio signal decodings of described audio decoder module, the extraction user carries out the audio signal that audio frequency is monitored needed band segment the larger audio signal of data volume from originally taking, reduce the data volume size of the audio signal in the transmission course, conveniently carry out remote transmission and the monitoring of audio signal.
As a kind of preferred implementation, described digital audio monitor further comprises deciphering module 123, as shown in Figure 3.In described digital TV network, be provided with CA (Contional Access, when condition reception) system or other encryption system are encrypted the audio signal of transmitting, deciphering module 123 extracts decoding key corresponding to described audio signal according to described audio program information from described digital TV network, then described decoding key is sent to described audio decoder module 121, described audio decoder module 121 is carried out decoding according to described decoding key to the described audio signal of correspondence.
To described VOIP coding module 122,122 pairs of described audio signals of described VOIP coding module are carried out the VOIP coding to described audio decoder module 121, and the described audio signal after will encoding is sent to described server 110 with decoded audio signal transmission.
VOIP(Voice over Internet Protocol) technology is exactly with the digitlization of simulated sound signal, does real-time transmission with the pattern of data packet at the IP data network.Carry out the VOIP coding by 122 pairs of described audio signals of described VOIP coding module, make described audio signal can pass through IP data network remote transmission to described server 110.Described server 110 receives after the audio signal of described VOIP coding module 122 transmissions, can described audio signal be fed back to user or observer by IP data network or VOIP network.
Further, comprise be used to the storage module (not shown) that stores described audio signal in the described server 110.Described storage module stores the audio signal that described VOIP coding module 122 sends at every turn, and according to described digital TV network nodal information and the described audio program information of correspondence each described audio signal is carried out mark.
When the observer need to replay described audio signal, the observer accesses described server 110, send the audio program information of described dialing instruction and request monitoring, described server 110 is searched corresponding described audio signal according to above-mentioned two information in described storage module, and directly described audio signal is sent to the observer.Therefore, by described storage module stored audio signal is set in described server 110, can directly from described storage module, extract a certain section audio signal of having monitored, and do not need described digital audio monitor 120 again to monitor, make observer's each section audio signal of can replaying quickly and easily as required.
Compared with prior art, be provided with described digital audio monitor 120 in the digital audio monitoring system 10 of the present invention, wherein said audio decoder module 121 is extracted corresponding audio signal and is carried out decoding from described digital TV network, carry out the output of VOIP coding by 122 pairs of described audio signals of described VOIP coding module again, the data volume of the audio signal of then exporting is less and can make remote transmission at the IP data network, realizes the digital audio monitoring of far-end.Described digital audio monitor 120 is connected on each network node of described hfc plant, by described server 110 each described digital audio monitor 120 is carried out dial-up connection, can Real-Time Monitoring the audio signal of each described network node transmission, when fault occurs, can monitor more quickly and obtain, and can judge the position of the network node that breaks down, improve the efficient that digital TV network is safeguarded.
See also Fig. 4, Fig. 4 is the operation principle schematic diagram of a kind of monitoring mode of digital audio monitoring system of the present invention.
In this monitoring mode, in the described digital audio monitoring system 10, described server 110 connects telephony gateway 130 by the IP data network.User or observer be by general telephone network, to telephony gateway 130 Sending dialled number instructions, and accesses the server 110 of described digital audio monitoring system 10 by described telephony gateway 130, sends described audio program information.Described server 110 obtains the audio signal of monitoring according to described audio program information from described digital audio monitor 120, after perhaps directly from described storage module wherein, extracting corresponding audio signal, with described audio signal transmission to described telephony gateway 130; Described telephony gateway 130 receives described audio signal, and described audio signal is converted to telephone signal, then feeds back described audio signal by telephone network to user or observer.
Described server 110 can judge further user or observer send access by which kind of mode, if send access by described telephony gateway 130, the described audio signal that then will monitor feeds back to the observer by described telephony gateway 130; If directly access described server 110 by the IP data network, then feed back described audio signal by the IP data network to the observer.
Because telephone network is to cover at present wide and comparatively stable communication network, can increase the user to the access mode of described server by described telephony gateway 130 is set, and is convenient to the monitoring of digital audio.
See also Fig. 5, Fig. 5 is the operation principle schematic diagram of the another kind of monitoring mode of digital audio monitoring system of the present invention.
In this monitoring mode, the observer utilizes the VOIP phone directly to access described server 110 by the IP data network, because the VOIP phone is two-way voice call, therefore, can send Monitoring instruction to described server 110 by described VOIP phone, and obtain the voice data of monitoring from described server 110.Along with popularizing of network telephone service, it is more and more convenient that this kind monitoring mode will become, and can reduce the cost of the phone call that produces when access by telephone network, reduction monitoring cost.
See also Fig. 6, Fig. 6 is the flow chart of steps of digital audio monitoring method of the present invention.
Described digital audio monitoring method may further comprise the steps:
S101 receives the user by server and asks the network node information of monitoring;
Wherein, described server is the special server that is used for the digital audio monitoring that arranges, and is used for receiving user's detection request, and returns the audio signal of monitoring.When the observer asks described server by IP data network or the receiving of VOIP direct network, when perhaps accessing described server by telephone network, receive the network node information that the user asks the described digital TV network of monitoring by described server.
S102 is according to network node corresponding to institute's network node information search;
With the network address information pre-save of each described network node in described server.After receiving described network node information, according to the network address information of the described network node of described network node information searching, search corresponding network node.Wherein, described network node comprises outdoor digital TV network node and the digital TV set-top box in the user family etc.
S103 receives the user by server and asks the audio program information of monitoring;
Wherein, described audio program information can be by TSID(transport stream id flow transmission number) and Audio PID (audio frequency PID) form, it is mainly used in the channel of the audio program of designated user request monitoring.
S104 extracts corresponding audio signal according to described audio program information from described network node;
S105 decodes to the described audio signal of extracting;
Because the tonequality of the high definition audio signal that transmits in the digital TV network is had relatively high expectations, so its data volume is generally all larger, be unfavorable for carrying out remote transmission of monitoring, by to described audio signal decoding, the extraction user carries out the audio signal that audio frequency is monitored needed band segment the larger audio signal of data volume from originally taking, reduce the data volume size of the audio signal in the transmission course, conveniently carry out remote transmission and the monitoring of audio signal.
As a kind of preferred implementation, when the described audio signal of extracting is decoded, if described audio signal is the process encryption before transmission, then need to extract decoding key corresponding to described audio signal according to described audio program information, according to described decoding key described audio signal is carried out decoding again and process.
S106 carries out the VOIP coding to described audio signal;
Described audio signal is carried out the VOIP coding, make described audio signal by IP data network remote transmission to described server, realize remote monitoring.
S107 is sent to described server with the described audio signal behind the coding.
Described server receives through after the audio signal behind the VOIP coding, and user or observer just can be by IP data network or the described server of VOIP access to netwoks to obtain described audio signal.
As a kind of preferred implementation, after described server receives through the audio signal behind the VOIP coding, in order to make things convenient for the user audio signal of once monitoring is replayed, further carry out following steps:
In described server, store the described audio signal after encoding, and according to described network node information and the described audio program information of correspondence each described audio signal is carried out mark; According to user's solicited message, from described server, extract corresponding described audio signal.
By in described server, storing described audio signal, can directly from described server, extract a certain section audio signal of having monitored, and do not need to re-start monitoring, make as required convenient each section audio signal of replaying rapidly of observer.
As a kind of preferred implementation, the audio signal in the described server can be sent to first telephony gateway and carry out the signal conversion, and then by telephone network the user is sent described audio signal; And also can pass through described telephony gateway, receive the detection request that the user sends to described server by telephone network, i.e. described network node information and described audio program information.
Because telephone network is to cover at present wide and comparatively stable communication network, can increase the user to the access mode of described server by described telephony gateway, and is convenient to the monitoring of digital audio.
As another kind of preferred implementation, can utilize the VOIP phone directly to access described server by the IP data network, because the VOIP phone is two-way voice call, therefore, can send Monitoring instruction to described server by described VOIP phone, and obtain the voice data of monitoring from described server.Along with popularizing of network telephone service, it is more and more convenient that this kind monitoring mode will become, and can reduce the cost of the phone call that produces when access by telephone network, reduction monitoring cost
Compared with prior art, in the digital audio monitoring method of the present invention, can long-range reception user ask network node information and the audio program information of monitoring by described server, from described digital TV network, extract corresponding audio signal and carry out decoding, again described audio signal is carried out returning described server behind the VOIP coding, monitor for the user.Because the data volume of the audio signal in the described server is less and can make remote transmission at the IP data network, so can realize the digital audio monitoring of far-end.And can monitor in real time the audio signal situation of each network node transmission of described digital TV network by accessing described server, when fault occurs, can monitor more quickly and obtain, and can judge the position of the network node that breaks down, improve the efficient that digital TV network is safeguarded.
Above-described embodiment of the present invention does not consist of the restriction to protection range of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (10)
1. digital audio monitor comprises:
Be used for extracting corresponding audio signal according to the audio program information that the user asks to monitor from digital TV network, and the described audio signal decoding to extracting, from described audio signal, extract the user and carry out the audio decoder module that audio frequency is monitored the audio signal of needed band segment;
And, be used for the audio signal after the described audio decoder module decoding processing is carried out the VOIP coding, and the VOIP coding module of the described audio signal after the output encoder processing.
2. digital audio monitor as claimed in claim 1 is characterized in that, described digital audio monitor further comprises:
Be used for extracting the decoding key of corresponding described audio signal according to described audio program information, and described decoding key be sent to the deciphering module of described audio decoder module;
Described audio decoder module is carried out decoding according to described decoding key to described audio signal.
3. a digital audio monitoring system is characterized in that comprising: server and digital audio monitor;
Described server is used for receiving user's dialing instruction and the audio program information that request is monitored, and searches corresponding digital audio monitor according to described dialing instruction, and described audio program information is sent to corresponding described digital audio monitor; Receive the audio signal of described digital audio monitor monitoring;
Described digital audio monitor comprises:
Be used for extracting corresponding audio signal according to described audio program information from digital TV network, and to described audio signal decoding, from described audio signal, extract the user and carry out the audio decoder module that audio frequency is monitored the audio signal of needed band segment;
And, be used for the decoded described audio signal of described audio decoder module is carried out the VOIP coding, and the described audio signal after will encoding is sent to the VOIP coding module of described server.
4. digital audio monitoring system as claimed in claim 3 is characterized in that, described digital audio monitor further comprises:
Be used for extracting the decoding key of corresponding described audio signal according to described audio program information, and described decoding key be sent to the deciphering module of described audio decoder module;
Described audio decoder module is carried out decoding according to described decoding key to described audio signal.
5. such as claim 3 or 4 described digital audio monitoring systems, it is characterized in that described server further comprises: the storage module that is used for storing the described audio signal after encoding; Described server is transferred corresponding described audio signal according to user's solicited message from described storage module.
6. such as claim 3 or 4 described digital audio monitoring systems, it is characterized in that further comprising: be used for receiving described audio signal from described server, and described audio signal be converted to the telephony gateway of telephone signal.
7. digital audio monitoring method is characterized in that may further comprise the steps:
Receive the user by server and ask the network node information of monitoring, and according to network node corresponding to institute's network node information search;
Receive the user by described server and ask the audio program information of monitoring, extract corresponding audio signal according to described audio program information from described network node;
And the described audio signal of extracting decoded, from described audio signal, extract the user and carry out the audio signal that audio frequency is monitored needed band segment;
Decoded described audio signal is carried out the VOIP coding, and the described audio signal after will encoding is sent to described server.
8. digital audio monitoring method as claimed in claim 7 is characterized in that, the step of described audio signal decoding is comprised:
Further extract decoding key corresponding to described audio signal according to described audio program information, according to described decoding key described audio signal is carried out decoding.
9. such as claim 7 or 8 described digital audio monitoring methods, it is characterized in that, the described audio signal behind the coding be sent to described server further carry out afterwards following steps:
In described server, store the described audio signal after encoding;
According to user's solicited message, from described server, extract corresponding described audio signal.
10. such as claim 7 or 8 described digital audio monitoring methods, it is characterized in that, the described audio signal behind the coding be sent to described server further carry out afterwards following steps:
Audio signal in the described server is sent to telephony gateway carries out the signal conversion, then provide described audio signal by telephone network to the user.
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