CN107147462A - A kind of clock correcting method and system - Google Patents
A kind of clock correcting method and system Download PDFInfo
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- CN107147462A CN107147462A CN201710252833.0A CN201710252833A CN107147462A CN 107147462 A CN107147462 A CN 107147462A CN 201710252833 A CN201710252833 A CN 201710252833A CN 107147462 A CN107147462 A CN 107147462A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0644—External master-clock
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electric Clocks (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The present invention relates to the field of synthesizing multi-path voice data, more particularly to a kind of clock correcting method and system.The present invention obtains preliminary calibration value by initialization of calibration value；According to the local clock of the preliminary calibration value calibration client, preliminary clock is obtained；Prefixed time interval obtains client and sends calibration request to the duration for receiving standard time clock, forms transmission duration set；The preliminary clock is calibrated according to minimum duration in the transmission duration set, precision clock is obtained.Realize the accuracy for improving clock alignment.
Description
Technical field
The present invention relates to the field of synthesizing multi-path voice data, more particularly to a kind of clock correcting method and system.
Background technology
, need to be using the clock of server as standard calibration during multi-path audio-frequency data is synthesized into voice data all the way
The local clock of client where each voice data.But, existing clock correcting method often have ignored client and service
The time error produced during device calibration clock, the reason for producing the time error is, when client is intended to calibrate first
The value of local clock is carved, calibration clock request is initiated to service end, service end is received after the calibration clock request of client, obtained
The value of current server clock is taken as the standard value after the calibration of the first moment of client local clock, it should be noted that institute
Stating the value of current server clock, there is difference in actual standard value corresponding with the first moment of client local clock.Though
So, the possible very little of difference of the standard value after the calibration of client local clock and actual standard value, still, in distributed environment
Under, the difference of several seconds is often can reach, the problems such as causing the voice data after synthesis to not upper beat or even have obvious echo.
And under distributed environment, because the clock of server and each client has differences, it is impossible to accurately learn client
Transmission calibration clock request in end gets the actual time spent by this process of present clock to server to server, together
Sample can not also learn that server sends the actual time spent by standard value to the process of client, so as to cause in distributed ring
Under border, each client is not ensured that to work on same phy clock；In addition, client calibrates that of clock in progress
A moment is as the factor such as busy extent, the physical configuration of the scheduling time difference and equipment in itself of equipment causes each equipment memory
Clock has differences.Therefore, it is low using existing calibration clock method accuracy under distributed environment, easily cause after synthesis
The problems such as voice data even has obvious echo to not upper beat.
The content of the invention
The technical problems to be solved by the invention are：How under distributed environment, calibration client local clock is improved
Accuracy.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
The present invention provides a kind of clock correcting method, including：
S1, initialization of calibration value, obtain preliminary calibration value；
S2, the local clock according to the preliminary calibration value calibration client, obtain preliminary clock；
S3, prefixed time interval obtain client and send calibration request to the duration for receiving standard time clock, form transmission
Duration set；
S4, the preliminary clock calibrated according to minimum duration in the transmission duration set, obtain precision clock.
The present invention also provides a kind of clock alignment system, including：
Initialization module, for initialization of calibration value, obtains preliminary calibration value；
First calibration module, for the local clock according to the preliminary calibration value calibration client, obtains preliminary clock；
First acquisition module, obtains client for prefixed time interval and sends calibration request to receiving standard time clock
Duration, forms transmission duration set；
Second calibration module, for calibrating the preliminary clock according to minimum duration in the transmission duration set, is obtained
Precision clock.
The beneficial effects of the present invention are：The present invention passes through interior, client discontinuity and server communication in a period of time
The standard time clock of server is obtained, and according to the minimal communications duration got in a period of time, i.e., is sent closest to client
Calibration clock request gets twice of the actual time spent by this process of present clock, school to server to server
The preliminary calibration value that standard is obtained by the standard time clock got according to the communication time and client of a client and server,
Realize that the local clock of the client after calibration approaches actual standard time clock, so as to improve the essence of calibration client local clock
Exactness.
Brief description of the drawings
A kind of FB(flow block) of the embodiment for clock correcting method that Fig. 1 provides for the present invention；
A kind of structured flowchart of the embodiment for clock alignment system that Fig. 2 provides for the present invention；
A kind of structured flowchart of the embodiment for clock alignment system that Fig. 3 separately provides for the present invention；
Label declaration：
1st, initialization module；11st, first acquisition unit；12nd, second acquisition unit；13rd, the first computing unit；14th, second
Computing unit；2nd, the first calibration module；3rd, the first acquisition module；4th, the second calibration module；41st, the 3rd acquiring unit；42nd, the 3rd
Computing unit；43rd, alignment unit；5th, the second acquisition module；6th, synthesis module；61st, synthesis unit；101st, client；102nd, take
Business device；103rd, end is synthesized.
Embodiment
To describe technology contents, the objects and the effects of the present invention in detail, below in conjunction with embodiment and coordinate attached
Figure is explained.
The design of most critical of the present invention is：The present invention is by the way that within a period of time, client discontinuity is led to server
Letter obtains the standard time clock of server, and calibrates preliminary calibration value according to the minimal communications duration got, so as to reduce by visitor
Family end transmission calibration clock request gets the calibration error produced by this process of present clock to server to server,
Improve the accuracy of clock alignment.
Fig. 1 be refer to Fig. 3,
As shown in figure 1, the present invention provides a kind of clock correcting method, including：
S1, initialization of calibration value, obtain preliminary calibration value；
S2, the local clock according to the preliminary calibration value calibration client, obtain preliminary clock；
S3, prefixed time interval obtain client and send calibration request to the duration for receiving standard time clock, form transmission
Duration set；
S4, the preliminary clock calibrated according to minimum duration in the transmission duration set, obtain precision clock.
Further, in addition to：
Obtain the voice data and precision clock corresponding with the voice data of two or more client；
The voice data of two or more client is synthesized according to precision clock corresponding with the voice data.
Seen from the above description, under distributed environment, realize that each client works under same phy clock, so that effectively
The phenomenons such as the voice data echogenicity after reduction synthesis.
Further, the voice data of two or more client is synthesized, is specially：
The voice data of two or more client is synthesized according to default normalization Mixed Audio Algorithm.
Seen from the above description so that the voice data smooth variation after synthesis, it is to avoid produce sonic boom.
Further, the S1 is specially：
Obtain client clock corresponding with predetermined time；
Obtain client and send calibration request to the duration for receiving standard time clock corresponding with predetermined time, obtain preliminary
Transmit duration；
Calculate the corresponding standard time clock of the predetermined time and preliminary transmission duration the half and, obtain described pre-
If the preliminary clock at moment；
The difference of the preliminary clock client clock corresponding with the predetermined time of the predetermined time is calculated, obtains described
Preliminary calibration value.
Further, the S4 is specially：
The half of minimum duration in the transmission duration set is obtained, precise delivery duration is obtained；
According to the preliminary transmission duration and the precise delivery duration, obtain transmitting duration error amount；
The preliminary clock according to the transmission duration error value calibration, obtains the precision clock.
As shown in Fig. 2 the present invention also provides a kind of clock alignment system, including：
Initialization module 1, for initialization of calibration value, obtains preliminary calibration value；
First calibration module 2, for the local clock according to the preliminary calibration value calibration client, when obtaining preliminary
Clock；
First acquisition module 3, obtains client for prefixed time interval and sends calibration request to receiving standard time clock
Duration, formed transmission duration set；
Second calibration module 4, for calibrating the preliminary clock according to minimum duration in the transmission duration set, is obtained
Precision clock；
Further, in addition to：
Second acquisition module 5, for obtaining the voice data of two or more client and corresponding with the voice data
Precision clock；
Synthesis module 6, the sound for synthesizing two or more client according to precision clock corresponding with the voice data
Frequency evidence.
Further, the synthesis module 6 includes：
Synthesis unit 61, the voice data for synthesizing two or more client according to default normalization Mixed Audio Algorithm.
Further, the initialization module 1 includes：
First acquisition unit 11, for obtaining client clock corresponding with predetermined time；
Second acquisition unit 12, calibration request is sent to receiving standard corresponding with predetermined time for obtaining client
The duration of clock, obtains tentatively transmitting duration；
First computing unit 13, for calculating the corresponding standard time clock of the predetermined time and the preliminary transmission duration
The sum of half, obtains the preliminary clock of the predetermined time；
Second computing unit 14, the preliminary clock client corresponding with the predetermined time for calculating the predetermined time
The difference of clock is held, the preliminary calibration value is obtained.
Further, second calibration module 4 includes：
3rd acquiring unit 41, the half for obtaining minimum duration in the transmission duration set, obtains precise delivery
Duration；
3rd computing unit 42, for according to the preliminary transmission duration and precise delivery duration, when obtaining transmission
Long error amount；
Alignment unit 43, for the preliminary clock according to the transmission duration error value calibration, when obtaining described accurate
Clock.
Embodiments of the invention one are：
The present embodiment provides a kind of clock correcting method, including：
S1, initialization of calibration value, obtain preliminary calibration value；Specially：
S11, acquisition client clock corresponding with predetermined time；
Wherein, obtain and record active client Client1 local clock C1；
S12, acquisition client send calibration request to the duration for receiving standard time clock corresponding with predetermined time, obtain
Preliminary transmission duration；
Wherein, client Client1 sends calibration request to server, and obtains the local of active client Client1
Clock StartTime, server is received after calibration request, obtains the Current standards clock S1 of server, and during by the standard
Clock S1 sends to client Client1, client Client1 and obtains active client while receiving standard time clock S1
Client1 local clock EndTime, a length of EndTime and StartTime difference during the preliminary transmission；
Obviously, there is error between the corresponding actual standard clocks of client Client1 local clock C1 and S1, the mistake
Difference sends calibration request to the duration obtained spent by the standard time clock S1 of server for client Client1 to server；
S13, calculate the corresponding standard time clock of the predetermined time and the half of the preliminary transmission duration and, obtain institute
State the preliminary clock of predetermined time；
Wherein, the preliminary clock that preliminary calibration obtains client Client1 local clock C1 is, S1-1/2
(EndTime-StartTime)；
S14, the preliminary clock client clock corresponding with the predetermined time of the calculating predetermined time difference, are obtained
The preliminary calibration value；
Wherein, the preliminary calibration value is, C1- (S1-1/2 (EndTime-StartTime))；
S2, the local clock according to the preliminary calibration value calibration client, obtain preliminary clock；
Wherein, active client Client1 local clock C2, then preliminary clock corresponding with C2 be
PreliminaryClock=C2- (C1- (S1-1/2 (EndTime-StartTime)))；
S3, prefixed time interval obtain client and send calibration request to the duration for receiving standard time clock, form transmission
Duration set；
S4, the preliminary clock calibrated according to minimum duration in the transmission duration set, obtain precision clock；Specifically
For：
S41, the half for obtaining minimum duration in the transmission duration set, obtain precise delivery duration；
Where it is assumed that a period of time in get minimum when a length of transportTime, then a length of 1/ during precise delivery
2transportTime；
S42, according to the preliminary transmission duration and precise delivery duration, obtain transmitting duration error amount；
Wherein, the transmission duration error amount error is, error=1/2 (EndTime-StartTime) -1/
2transportTime；
S43, the preliminary clock according to the transmission duration error value calibration, obtain the precision clock；
Wherein, the precision clock is, preciseClock=preliminaryClock-error；
S5, the voice data and precision clock corresponding with the voice data for obtaining two or more client；
Wherein, synthesis end obtains the sound that each client (Client1, Client2 ...) under distributed environment is collected
Frequency evidence, and precision clock corresponding with the voice data；Specially：
When each client (Client1, Client2 ...) under distributed environment collects voice data, just according to just
Step calibration value calibration client local clock corresponding with the collection moment, obtains preliminary clock；Client send voice data and
Corresponding preliminary clock is to synthesizing end；When the voice data gathered needed for the client, which is all gathered, to be finished, transmission duration is obtained
Minimum duration in set, calibrated according to minimum duration in the transmission duration set correspondence client voice data it is preliminary
Clock, obtains precision clock；
S6, the voice data according to precision clock corresponding with voice data synthesis two or more client；
Wherein, the voice data of two or more client is synthesized according to default normalization Mixed Audio Algorithm.
As shown in Fig. 2 embodiments of the invention two are：
The present embodiment provides a kind of clock alignment system, including：
The initialization of calibration value of initialization module 1, obtains preliminary calibration value；Specifically, being obtained by first acquisition unit 11
Client clock corresponding with predetermined time；Second acquisition unit 12 obtains client and sends calibration request to receiving and preset
The duration of moment corresponding standard time clock, obtains tentatively transmitting duration；First computing unit 13 calculates the predetermined time correspondence
Standard time clock and preliminary transmission duration the half and, obtain the preliminary clock of the predetermined time；Second calculates single
Member 14 calculates the difference of the preliminary clock client clock corresponding with the predetermined time of the predetermined time, obtains described preliminary
Calibration value；
First calibration module 2 obtains preliminary clock according to the local clock of the preliminary calibration value calibration client；First
The prefixed time interval of acquisition module 3 obtains client and sends calibration request to the duration for receiving standard time clock, when forming transmission
Long set；
Second calibration module 4 calibrates the preliminary clock according to minimum duration in the transmission duration set, obtains accurate
Clock；Specifically, obtaining the half of minimum duration in the transmission duration set by the 3rd acquiring unit 41, accurately passed
Defeated duration；3rd computing unit 42 obtains transmitting duration error according to the preliminary transmission duration and the precise delivery duration
Value；The preliminary clock according to the transmission duration error value calibration of alignment unit 43, obtains the precision clock；
Second acquisition module 5 obtain two or more client voice data and it is corresponding with the voice data accurate when
Clock；Synthesis module 6 synthesizes the voice data of two or more client according to precision clock corresponding with the voice data；Specifically
For the voice data of two or more client is synthesized according to default normalization Mixed Audio Algorithm by synthesis unit 61.
As shown in figure 3, embodiments of the invention three are：
The present embodiment provides a kind of clock alignment system, including client 101, server 102 and synthesis end 103；It is described
Client 101 includes：Initialization module 1, the first calibration module 2 and the first acquisition module 3；The synthesis end 103 includes：Second
Calibration module 4, the second acquisition module 5 and synthesis module 6；
Each client 101 under distributed environment by the voice data collected, i.e., it is corresponding with the voice data just
Step clock is sent to synthesis end 103；Gathered from collection voice data is started to end in this period of voice data, client
101 send calibration request to server 102, and obtain transmission duration set；When each client under distributed environment is gathered
Voice data is finished, and each client is calibrated in synthesis end 103 according to minimum duration in the corresponding transmission duration set of each client 101
Corresponding preliminary clock obtains precision clock；Synthesis end 103 synthesizes the voice data that each client is sent.
In summary, a kind of clock correcting method for providing of the present invention and system, by within a period of time, between client
Disconnected property obtains the standard time clock of server with server communication, and according to the minimal communications duration got in a period of time, i.e.,
Calibration clock request is sent closest to client to get spent by this process of present clock to server to server
Twice of actual time, calibrates the standard time clock by being got according to the communication time and client of a client and server
Obtained preliminary calibration value, realizes that the local clock of the client after calibration approaches actual standard time clock, so as to improve calibration
The accuracy of client local clock.Further, under distributed environment, each client work under same phy clock is realized
Make, so that the phenomenon such as voice data echogenicity effectively after reduction synthesis；Further so that the voice data after synthesis is put down
Gradualization, it is to avoid produce sonic boom.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalents that bright specification and accompanying drawing content are made, or the technical field of correlation is directly or indirectly used in, similarly include
In the scope of patent protection of the present invention.
Claims (10)
1. a kind of clock correcting method, it is characterised in that including：
S1, initialization of calibration value, obtain preliminary calibration value；
S2, the local clock according to the preliminary calibration value calibration client, obtain preliminary clock；
S3, prefixed time interval obtain client and send calibration request to the duration for receiving standard time clock, form transmission duration
Set；
S4, the preliminary clock calibrated according to minimum duration in the transmission duration set, obtain precision clock.
2. clock correcting method according to claim 1, it is characterised in that also include：
Obtain the voice data and precision clock corresponding with the voice data of two or more client；
The voice data of two or more client is synthesized according to precision clock corresponding with the voice data.
3. clock correcting method according to claim 2, it is characterised in that the audio number of synthesis two or more client
According to specially：
The voice data of two or more client is synthesized according to default normalization Mixed Audio Algorithm.
4. clock correcting method according to claim 1, it is characterised in that the S1 is specially：
Obtain client clock corresponding with predetermined time；
Obtain client and send calibration request to the duration for receiving standard time clock corresponding with predetermined time, tentatively transmitted
Duration；
Calculate the corresponding standard time clock of the predetermined time and preliminary transmission duration the half and, when obtaining described default
The preliminary clock carved；
The difference of the preliminary clock client clock corresponding with the predetermined time of the predetermined time is calculated, obtains described preliminary
Calibration value.
5. clock correcting method according to claim 4, it is characterised in that the S4 is specially：
The half of minimum duration in the transmission duration set is obtained, precise delivery duration is obtained；
According to the preliminary transmission duration and the precise delivery duration, obtain transmitting duration error amount；
The preliminary clock according to the transmission duration error value calibration, obtains the precision clock.
6. a kind of clock alignment system, it is characterised in that including：
Initialization module, for initialization of calibration value, obtains preliminary calibration value；
First calibration module, for the local clock according to the preliminary calibration value calibration client, obtains preliminary clock；
First acquisition module, for prefixed time interval obtain client send calibration request to receive standard time clock when
It is long, form transmission duration set；
Second calibration module, for calibrating the preliminary clock according to minimum duration in the transmission duration set, obtains accurate
Clock.
7. clock alignment system according to claim 6, it is characterised in that also include：
Second acquisition module, for obtain two or more client voice data and it is corresponding with the voice data accurate when
Clock；
Synthesis module, the audio number for synthesizing two or more client according to precision clock corresponding with the voice data
According to.
8. clock alignment system according to claim 7, it is characterised in that the synthesis module includes：
Synthesis unit, the voice data for synthesizing two or more client according to default normalization Mixed Audio Algorithm.
9. clock alignment system according to claim 6, it is characterised in that the initialization module includes：
First acquisition unit, for obtaining client clock corresponding with predetermined time；
Second acquisition unit, calibration request is sent to receiving standard time clock corresponding with predetermined time for obtaining client
Duration, obtains tentatively transmitting duration；
First computing unit, for calculating the corresponding standard time clock of the predetermined time and the half of the preliminary transmission duration
With obtain the preliminary clock of the predetermined time；
Second computing unit, the preliminary clock client clock corresponding with the predetermined time for calculating the predetermined time
Difference, obtain the preliminary calibration value.
10. clock alignment system according to claim 9, it is characterised in that second calibration module includes：
3rd acquiring unit, the half for obtaining minimum duration in the transmission duration set, obtains precise delivery duration；
3rd computing unit, for according to the preliminary transmission duration and the precise delivery duration, obtaining transmitting duration error
Value；
Alignment unit, for the preliminary clock according to the transmission duration error value calibration, obtains the precision clock.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710252833.0A CN107147462B (en) | 2017-04-18 | 2017-04-18 | A kind of clock correcting method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710252833.0A CN107147462B (en) | 2017-04-18 | 2017-04-18 | A kind of clock correcting method and system |
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| CN107147462A true CN107147462A (en) | 2017-09-08 |
| CN107147462B CN107147462B (en) | 2019-01-15 |
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ID=59774692
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107230474B (en) * | 2017-04-18 | 2020-06-09 | 福建天泉教育科技有限公司 | Method and system for synthesizing audio data |
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| CN1933414A (en) * | 2005-09-13 | 2007-03-21 | 上海欣泰通信技术有限公司 | Time regulation algorithm for network time synchronizing in telecommunication field |
| WO2008103170A1 (en) * | 2007-02-20 | 2008-08-28 | Symmetricom, Inc. | Assisted wall-clock |
| CN101022416A (en) * | 2007-03-06 | 2007-08-22 | 华为技术有限公司 | Method for regulating clock frequency customer terminal and system |
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