CN100589511C - From pulse code modulation data, detect the also method and system of demodulating facsimile - Google Patents
From pulse code modulation data, detect the also method and system of demodulating facsimile Download PDFInfo
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- CN100589511C CN100589511C CN200710097793A CN200710097793A CN100589511C CN 100589511 C CN100589511 C CN 100589511C CN 200710097793 A CN200710097793 A CN 200710097793A CN 200710097793 A CN200710097793 A CN 200710097793A CN 100589511 C CN100589511 C CN 100589511C
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Abstract
The invention discloses a kind of also method of demodulating facsimile that detects from pulse code modulation data, comprising: the digital demodulation module receives the PCM data, carries out tone signal and detects, and sends to fax control procedure parsing module; When fax control procedure parsing module is judged the beginning facsimile service, the control figure demodulation module carries out the demodulation of the binary coded signal of fax program, the demodulation that message transmits the binary coded signal of control, and the demodulation of facsimile chart image data, the facsimile chart image data after the demodulation is sent to facsimile chart image data processing module; Fax control procedure parsing module control facsimile chart image data processing module positions and stores the facsimile chart image data.The invention discloses a kind of also system of demodulating facsimile that from pulse code modulation data, detects.The present invention can guarantee the stability of demodulation, has saved system resource and equipment cost, has simplified the complexity of system, has improved the real-time of facsimile monitoring.
Description
Technical field
The present invention relates to the monitoring technique in the communications field, relate in particular detect the also method and system of demodulating facsimile in a kind of PCM (pulse code modulation, pulse code modulation) data under the monitoring record.
Background technology
Current along with the continuous development of the communication technology and the needs of national security, need carry out full-service to existing communication network and monitor, comprise voice, video, fax etc.
The increase hardware resource detects and the demodulation realization facsimile monitoring of the standard of ETSI monitoring at present on audiomonitor by adopting.Owing to be subjected to the restriction of decoding chip, the performance of detection and demodulation is very unstable.And because of needs take audiomonitor switching network resource, the processing capacity also can be limited.After detection, demodulation failure, also need playback again, increased the complexity of system.
Summary of the invention
The technical problem to be solved in the present invention just provides in a kind of PCM (pulsecode modulation, pulse code modulation) data under the monitoring record and detects the also method and system of demodulating facsimile.Avoid detecting and unstable properties, the processing capacity of demodulation is limited and detecting, after the demodulation failure, also needing playback again, increased the problem of the complexity of system.
In order to solve the problems of the technologies described above, the invention provides a kind of also method of demodulating facsimile that from pulse code modulation data, detects, comprise the steps:
(1) the digital demodulation module receives the PCM data, carries out tone signal and detects, and sends to fax control procedure parsing module;
When (2) fax control procedure parsing module was judged the beginning facsimile service, the control figure demodulation module carried out the demodulation of the binary coded signal of fax program;
(3) fax control procedure parsing module control figure demodulation module carries out the demodulation that message transmits the binary coded signal of control, and the demodulation of facsimile chart image data, and the facsimile chart image data after the demodulation is sent to facsimile chart image data processing module; Fax control procedure parsing module control facsimile chart image data processing module positions and stores the facsimile chart image data.
Further, in the described step (2), the demodulation of the binary coded signal of described fax program comprises demodulating and carries out the consultation parameter that the facsimile chart image data transmits between the terminal that described parameter comprises terminal capability, facsimile chart image data coded system, speed, Frame and block size.
Further, in the described step (3), described fax control procedure parsing module control figure demodulation module carries out the demodulation that message transmits the binary coded signal of control, comprise and demodulate beginning and the end that pictorial data transmits, the separation of the frame of data and the numbering of piece, page or leaf, the correct affirmation that receives data, and the numbering of the make mistakes frame, piece and the page or leaf that are passed when retransmitting.
Further, in the described step (3), fax control procedure parsing module control figure demodulation module carries out the timing of separating of facsimile chart image data, fax control procedure parsing module is according to digital demodulation module demodulated data, analyze after one page has transmitted, whether transmit the multipage data or transmit ED.
Further, after described step (3) is carried out, when fax control procedure parsing module detects page data transmission course end signal, then notify digital demodulation module fax completion, and notice facsimile chart image data processing module is preserved data, and give fax with the data of preserving and check module, check that by fax module demonstrates the fax image.
In order to solve the problems of the technologies described above, the present invention also provides a kind of also system of demodulating facsimile that detects from pulse code modulation data, comprise the digital demodulation module, fax control procedure parsing module, and facsimile chart image data processing module, wherein,
Described digital demodulation module, be used to receive the PCM data, carrying out tone signal detects, send to fax control procedure parsing module, and according to the demodulation of the binary coded signal of fax control procedure parsing module control carrying out fax program, message transmits the demodulation of separating mediation facsimile chart image data of the binary coded signal of control, and the facsimile chart image data that demodulates is sent to facsimile chart image data processing module;
Described fax control procedure parsing module is used for digital demodulation module, facsimile chart image data processing module are controlled;
Described facsimile chart image data processing module is used for the facsimile chart image data is positioned and stores.
Further, described digital demodulation module is according to the demodulation of the binary coded signal of fax control procedure parsing module control carrying out fax program, carry out the consultation parameter that the facsimile chart image data transmits between the terminal for demodulating, described parameter comprises terminal capability, facsimile chart image data coded system, speed, Frame and block size.
Further, described digital demodulation module is according to the demodulation of the binary coded signal of fax control procedure parsing module control carrying out message transmission control, for demodulating beginning and the end that pictorial data transmits, the separation of the frame of data and the numbering of piece, page or leaf, the correct affirmation that receives data, and the numbering of the make mistakes frame, piece and the page or leaf that are passed when retransmitting.
Further, described fax control procedure parsing module also is used for according to the detection of described digital demodulation module to tone signal, analyze and finish fax foundation, then the control figure demodulation module carries out the demodulation of separating mediation facsimile chart image data of the binary coded signal of fax program and message transmission control, and the facsimile chart image data after the demodulation is sent to facsimile chart image data processing module.
Further, also comprising faxes checks module, is used to the data of pictorial data processing module preservation of receiving faxes, and demonstrates the fax image;
Described fax control procedure parsing module also is used for then notifying digital demodulation module fax completion when detecting page data transmission course end signal, and notice facsimile chart image data processing module is preserved data.
Compared with prior art, the present invention has reached following effect:
1. the stability of demodulation be can guarantee, system resource and equipment cost saved;
2. simplify the complexity of system, improved the real-time of facsimile monitoring.
Description of drawings
Fig. 1 is the system block diagram of embodiments of the invention.
Embodiment
Accepted standard is " ITU-T is for document facsimiletransmission in the general switched telephone network T.30Procedures " (" ITU-T is the document facsimile transmission procedure in the universal telephone switching network T.30 ") among the present invention.
The present invention is mainly by the following technical solutions: on the listening center foreground voice PCM data of monitoring under the record are passed to the backstage, the backstage increased of the present invention detect and the system of demodulating facsimile handles from the PCM data before the storage data:
After the backstage received the PCM data that the foreground sends, system of the present invention detected the tone signal and the binary coded signal of fax by digital demodulation, to confirm whether to have facsimile service; If any, according to ITU-T (Procedures for document facsimile transmission in thegeneral switched telephone network) the described process demodulating facsimile of fax standard pictorial data T.30, and save as file.
As shown in Figure 1, after the PCM data flow under the record of listening center foreground is sent to the backstage, general execution A, B, C, D, five stages of E:
The A stage: at first digital demodulation module 101 adopts the digital demodulation algorithm to carry out the tone signal detection that facsimile call is set up, as CNG (Calling tone, the calling tone signal), CED (Called terminalidentification, terminal called sign tone signal) etc., detected signal is issued fax control procedure parsing module 102;
The B stage: when fax control procedure parsing module 102 analyzes after the fax of finishing the A stage sets up, fax control procedure parsing module 102 informs that digital demodulation module 101 faxes begin to have entered the B stage, carry out the demodulation of the binary coded signal of fax program, this stage demodulates the consultation parameter that the facsimile chart image data transmits between the terminal, as terminal capability, facsimile chart image data coded system, speed, Frame and block size; Described binary coded signal comprises DIS (Digital identificationsignal, the terminal capability id signal), DCS (Digital command signal, digital command signal), CFR (Confirmation to receive, signal reception acknowledgement signal) etc.;
The C stage: when the analysis of finishing the consultation parameter that the facsimile chart image data transmits between the B stage terminal, fax control procedure parsing module 102 informs that digital demodulation module 101 faxes begin to have entered the C stage, carry out the demodulation that message transmits the binary coded signal of control; Described binary coded signal comprises PPS (Partial page signal, the transmission page data-signal), MCF (Message confirmation, Fax Messaging confirmation of receipt signal), PPR (Partial page request, request transmission page data-signal), RNR (Receive not ready, the busy signal of receiving terminal), RR (Receive ready, receiving-end state whether idle request signal) etc.; Fax control procedure parsing module 102 is according to digital demodulation module 101 demodulated data, analyze beginning and end that pictorial data transmits, the frame of data and the numbering of piece, the separation of page or leaf, the correct affirmation that receives data, and the frame of makeing mistakes and being passed when retransmitting, the numbering of piece and page or leaf, the consultation parameter control figure demodulation module 101 that the facsimile chart image data that obtains in stage according to these signal messages and B transmits is located pictorial data in the PCM data, demodulation and send to facsimile chart image data processing module 103 then, 103 pairs of pictorial data that send of control facsimile chart image data processing module position and store in whole facsimile data, and replace the wrong data of retransmitting;
The D stage: in this stage, fax control procedure parsing module 102 analyzes after one page has transmitted according to digital demodulation module 101 demodulated data, whether transmits the multipage data or transmits ED, if also have other page data to need to transmit, then return and carry out the C stage;
The E stage: fax completion stage, when fax control procedure parsing module detects PPS-EOP (page data transmission course end signal), inform digital demodulation module 101 fax completions, and enter E stage fax completion process, tell facsimile chart image data processing module 103 to preserve data; Facsimile chart image data processing module 103 is given fax the data of preserving and is checked module 104, and fax checks that module 104 demonstrates the fax image.
Claims (11)
1. one kind is detected the also method of demodulating facsimile from pulse code modulation data, comprises the steps:
(1) digital demodulation module received pulse coded modulation PCM data are carried out tone signal and are detected, and send to fax control procedure parsing module;
When (2) fax control procedure parsing module was judged the beginning facsimile service, the control figure demodulation module carried out the demodulation of the binary coded signal of fax program, demodulated the consultation parameter that the facsimile chart image data transmits between the terminal;
(3) fax control procedure parsing module control figure demodulation module carries out the demodulation that message transmits the binary coded signal of control, and the demodulation of facsimile chart image data, wherein, carry out message transmit control binary coded signal separate timing, fax control procedure parsing module is according to digital demodulation module demodulated data, analyze signal message, in described PCM data, view data is located according to described signal message and described consultation parameter control figure demodulation module, demodulation and the facsimile chart image data after the demodulation sent to facsimile chart image data processing module then; Fax control procedure parsing module control facsimile chart image data processing module positions and stores the facsimile chart image data.
2. method according to claim 1 is characterized in that, in the described step (2), described consultation parameter comprises terminal capability, facsimile chart image data coded system, speed, Frame and block size.
3. method according to claim 1, it is characterized in that, in the described step (3), described signal message comprises beginning and the end that demodulates the pictorial data transmission, the separation of the frame of data and the numbering of piece, page or leaf, the correct affirmation that receives data, and the numbering of the make mistakes frame, piece and the page or leaf that are passed when retransmitting.
4. method according to claim 1, it is characterized in that, in the described step (3), fax control procedure parsing module control figure demodulation module carries out the timing of separating of facsimile chart image data, fax control procedure parsing module is according to digital demodulation module demodulated data, analyze after one page has transmitted, whether transmit the multipage data or transmit ED.
5. method according to claim 1, it is characterized in that, after described step (3) is carried out, when fax control procedure parsing module detects page data transmission course end signal, then notify digital demodulation module fax completion, and notice facsimile chart image data processing module preservation data, and give fax with the data of preserving and check module, check that by fax module demonstrates the fax image.
6. method according to claim 1, it is characterized in that described binary coded signal comprises whether idle request signal of transmission page data-signal, Fax Messaging confirmation of receipt signal, request transmission page data-signal, the busy signal of receiving terminal and receiving-end state.
7. one kind is detected the also system of demodulating facsimile from pulse code modulation data, it is characterized in that, comprises the digital demodulation module, fax control procedure parsing module, and facsimile chart image data processing module, wherein,
Described digital demodulation module, be used to receive the PCM data, carrying out tone signal detects, send to fax control procedure parsing module, and according to the demodulation of the binary coded signal of fax control procedure parsing module control carrying out fax program, message transmits the demodulation of separating mediation facsimile chart image data of the binary coded signal of control, and the facsimile chart image data that demodulates is sent to facsimile chart image data processing module; Wherein, carry out fax program binary coded signal separate timing, demodulate the consultation parameter that the facsimile chart image data transmits between the terminal;
Described fax control procedure parsing module is used for digital demodulation module, facsimile chart image data processing module are controlled; Wherein, carry out message transmit control binary coded signal separate timing, fax control procedure parsing module is used for according to digital demodulation module demodulated data, analyze signal message, according to described signal message and described consultation parameter control figure demodulation module in described PCM data to view data location, demodulation and the facsimile chart image data after the demodulation sent to facsimile chart image data processing module then; Fax control procedure parsing module also is used to control facsimile chart image data processing module the facsimile chart image data is positioned and stores;
Described facsimile chart image data processing module is used for according to the control of fax control procedure parsing module the facsimile chart image data being positioned and storing.
8. system according to claim 7 is characterized in that, described consultation parameter comprises terminal capability, facsimile chart image data coded system, speed, Frame and block size.
9. system according to claim 7, it is characterized in that, described digital demodulation module is according to the demodulation of the binary coded signal of fax control procedure parsing module control carrying out message transmission control, for demodulating beginning and the end that pictorial data transmits, the separation of the frame of data and the numbering of piece, page or leaf, the correct affirmation that receives data, and the numbering of the make mistakes frame, piece and the page or leaf that are passed when retransmitting.
10. system according to claim 7, it is characterized in that, described fax control procedure parsing module also is used for according to the detection of described digital demodulation module to tone signal, analyze and finish fax foundation, then the control figure demodulation module carries out the demodulation of separating mediation facsimile chart image data of the binary coded signal of fax program and message transmission control, and the facsimile chart image data after the demodulation is sent to facsimile chart image data processing module.
11. system according to claim 7 is characterized in that, also comprising faxes checks module, is used to the data of pictorial data processing module preservation of receiving faxes, and demonstrates the fax image;
Described fax control procedure parsing module also is used for then notifying digital demodulation module fax completion when detecting page data transmission course end signal, and notice facsimile chart image data processing module is preserved data.
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| CN200710097793A CN100589511C (en) | 2007-04-29 | 2007-04-29 | From pulse code modulation data, detect the also method and system of demodulating facsimile |
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| CN200710097793A CN100589511C (en) | 2007-04-29 | 2007-04-29 | From pulse code modulation data, detect the also method and system of demodulating facsimile |
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Effective date of registration: 20171025 Address after: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee after: Guangdong Gaohang Intellectual Property Operation Co., Ltd. Address before: 518057 Nanshan District high tech Industrial Park, Guangdong, South Road, science and technology, ZTE building, legal department Patentee before: ZTE Corporation |
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Inventor after: Yuan Aili Inventor before: Chen Qian Inventor before: Bao Xiaoyun Inventor before: Lu Kunlun |
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Effective date of registration: 20171101 Address after: 063000 Hebei province Tangshan City Yutian County town of lone tree tree village Spring Street No. 27 Patentee after: Yuan Aili Address before: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee before: Guangdong Gaohang Intellectual Property Operation Co., Ltd. |
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