CN104640063B - Low delay WIFI conference system and method - Google Patents
Low delay WIFI conference system and method Download PDFInfo
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- CN104640063B CN104640063B CN201510110043.XA CN201510110043A CN104640063B CN 104640063 B CN104640063 B CN 104640063B CN 201510110043 A CN201510110043 A CN 201510110043A CN 104640063 B CN104640063 B CN 104640063B
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Abstract
Low delay WIFI conference system and method, the system include meeting host computer and several meeting slave computers；Each meeting slave computer is for uploading data packet all the way；Meeting host computer at different starting sample time points for starting to sample each circuit-switched data packet respectively.The present invention is staggered starting sample time point of each circuit-switched data packet, is conducive to stagger data stream, reduces the interference between each circuit-switched data stream, improves broadband utilization rate, to improve communication efficiency, realizes low delay effect.
Description
Technical field
The present invention relates to a kind of low delay WIFI conference system and methods.
Background technique
Currently, wireless conference system includes infrared radio conference system, wireless radiofrequency conference system and WIFI wireless session
System.Although infrared radio conference system good confidentiality, Infrared Transmission angular range is small, is easy to influence number due to being blocked
According to transmission, bandwidth is limited, and audio needs to transmit after compressing, and poor mobility is suitble to small conference room to use.Wireless radiofrequency meeting
It is blocked although conference system signal is not afraid of, mobility is good, itself transmission signal strength is weak, and Encryption Algorithm is simple, and confidentiality is poor,
Also small conference room use can only be applicable in.WIFI wireless conference system has more advantage with respect to the above two, however, existing WIFI without
The meeting slave computer of line conference system can upload data to meeting host computer at any time, if multiple participants microphone speech simultaneously,
Or voted or registered simultaneously, it can usually make serious interference between each circuit-switched data, data need constantly to retransmit, and blocking is tight
Weight reduces bandwidth availability ratio, so that WIFI communication delay is serious in conference process, is such as generally delayed in 50ms or so, shadow
Ring meeting communication quality.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of low delay WIFI that can solve above-mentioned technical problem
Conference system and method.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of low delay WIFI conference system comprising meeting host computer and several meeting slave computers；
Each meeting slave computer is for uploading data packet all the way；
Meeting host computer at different starting sample time points for starting to sample each circuit-switched data packet respectively.
It preferably, is the time at equal intervals between every two adjacent starting sample time points.
Preferably, which caches each circuit-switched data packet to different buffer areas, from each starting sample time
After the preset time period lighted, the data cached size of each buffer area is compared with data cached threshold value respectively, if slow
Deposit data size is greater than data cached threshold value, then issues control information and notify corresponding meeting slave computer upload data too fast, with
So that corresponding meeting slave computer reduces data uploading speed；If data cached size is less than data cached threshold value, control is issued
It is excessively slow that information processed notifies that corresponding meeting slave computer uploads data, so that corresponding meeting slave computer, which increases data, uploads speed
Degree.
Preferably, meeting host computer is consistent with the sample rate of meeting slave computer, and sampling clock is synchronous.
Preferably, each meeting slave computer uploads data packet using UDP unicast technique.
A kind of low delay WIFI conference method comprising following steps:
Step 101: each meeting slave computer respectively uploads data packet all the way；And
Step 102: meeting host computer starts to sample each circuit-switched data packet respectively at different starting sample time points.
Preferably, this method is further comprising the steps of:
Step 103: meeting host computer caches each circuit-switched data packet to different buffer areas；
Step 104: meeting host computer from after the preset time period that each starting sample time lights, is judging each delay respectively
The data cached size for depositing area is greater than data cached threshold value, is also less than data cached threshold value, if more than step 105 is executed；
If being less than, step 106 is executed；
Step 105: meeting host computer issues control information and notifies corresponding meeting slave computer upload data too fast, so that
Corresponding meeting slave computer reduces data uploading speed；And
Step 106: meeting host computer issues control information and notifies corresponding meeting slave computer upload data excessively slow, so that
Corresponding meeting slave computer increases data uploading speed.
It preferably, is time point at equal intervals between each starting sample time point.
Beneficial effects of the present invention are at least as follows:
The present invention is staggered starting sample time point of each circuit-switched data packet, is conducive to stagger data stream, reduces each circuit-switched data
Interference between stream improves broadband utilization rate, to improve communication efficiency, realizes low delay effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the better embodiment of low delay WIFI conference system of the present invention.
Fig. 2 is the broad flow diagram of the better embodiment of low delay WIFI conference method of the present invention.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the present invention is described further:
Referring to Figure 1, the present invention relates to a kind of low delay WIFI conference system, better embodiment includes that meeting is upper
Machine and several meeting slave computers；
Meeting host computer can pass through WIFI hot spot and carry out wireless communication with several meeting slave computers.The quantity of meeting slave computer
WIFI hot spot quantity can be extended by interchanger, to be multiple such as 6 to meet the requirement of large conference room.
Each meeting slave computer is for uploading data packet all the way；For example, meeting slave computer, which passes through microphone, obtains participant
The audio analog signals of member, then audio analog signals are converted into digital signal by analog-digital converter, and pass through WIFI module
Digital signal is issued.
Specifically, each meeting slave computer can be used UDP unicast technique and upload data packet, wherein data packet may include ginseng
The speech audio data of meeting person, the corresponding data information such as feedback information and ballot feedback information of registering.
Meeting host computer at different starting sample time points for starting to sample each circuit-switched data packet respectively, such as
This, at the starting sample time point for each circuit-switched data packet that is staggered, is conducive to stagger data stream, reduces dry between each circuit-switched data stream
It disturbs, improves broadband utilization rate, to improve communication efficiency, realize low delay effect.
It preferably, is the time at equal intervals between every two adjacent starting sample time points.For example, if having 6 meeting slave computers
Data packet is uploaded, then meeting host computer started to sample the 1st circuit-switched data packet at 1/7*T time point, started to sample at 2/7*T time point
2nd circuit-switched data packet started to sample the 3rd circuit-switched data packet at 3/7*T time point, started to sample the 4th circuit-switched data at 4/7*T time point
Packet started to sample the 5th circuit-switched data packet at 5/7*T time point, started to sample the 6th circuit-switched data packet at 6/7*T time point.Wherein, T is
The reference units time long section independently set, for example, 6.667 milliseconds.
The meeting host computer caches each circuit-switched data packet to different buffer areas, pre- lighting from each starting sample time
If after the period, the data cached size of each buffer area is compared with data cached threshold value respectively, if data cached big
It is small to be greater than data cached threshold value, then it issues control information and notifies corresponding meeting slave computer upload data too fast, so that corresponding
Meeting slave computer reduce data uploading speed；If data cached size is less than data cached threshold value, it is logical to issue control information
It is excessively slow to know that corresponding meeting slave computer uploads data, so that corresponding meeting slave computer increases data uploading speed.In this way, wrong
ETAD expected time of arrival and departure point dynamic monitors the uploading speed of each circuit-switched data, it is ensured that the fluency of each circuit-switched data communication, without due to excessively slow
And there is obvious delay effect, data will not be generated due to too fast and are overflowed loses.
Sentence for example, the data cached size of the 1st circuit-switched data packet is compared with data cached threshold value at 2/7*T time point
It is disconnected, judgement is compared with data cached threshold value in the data cached size of the 2nd circuit-switched data packet at 3/7*T time point, in 4/7*T
Judgement is compared with data cached threshold value in the data cached size of 3rd circuit-switched data packet by time point, at 5/7*T time point by
Judgement is compared with data cached threshold value in the data cached size of 4 circuit-switched data packets, at 6/7*T time point by the 5th circuit-switched data packet
Data cached size judgement is compared with data cached threshold value, at 7/7*T time point by the data cached of the 6th circuit-switched data packet
Judgement is compared with data cached threshold value in size.
First in first out data buffer can be used as buffer area in the meeting host computer.
Meeting slave computer can adjust its digital phase-locked loop according to the control information of meeting host computer is corresponding, to realize that dynamic is adjusted
Joint number is according to uploading speed.
The meeting host computer is also used to read the data in each buffer area, by the data read out by digital-to-analogue conversion,
Play out audio signal after the processing such as signal amplification and signal filtering, or carry out data statistics processing etc., to the data read out
Post-processing would know that details are not described herein by the prior art.
In the present embodiment, meeting host computer is consistent with the sample rate of meeting slave computer, and sampling clock is synchronous, with further
Optimize low delay effect.
Preferably, meeting slave computer transmits 320 sampled points using data packet, and 16bit data, i.e. 640 bytes are realized most
Low delay 6.667ms.Since UDP is transmitted, there are the packet header UDP, too small data packets, efficiency of transmission is too low, and even if meeting host computer
Consistent with the sample rate of meeting slave computer, too big data packet also will increase system delay sometimes, therefore, using suitable data packet
Size is conducive to optimize low delay effect.
The meeting host computer can also pass through multicast mode and issue control packet, improve communication efficiency.
Referring to fig. 2, the invention further relates to a kind of low delay WIFI conference methods comprising following steps:
Step 101: each meeting slave computer respectively uploads data packet all the way；And
Step 102: meeting host computer starts to sample each circuit-switched data packet respectively at different starting sample time points.
Preferably, this method is further comprising the steps of:
Step 103: meeting host computer caches each circuit-switched data packet to different buffer areas；
Step 104: meeting host computer from after the preset time period that each starting sample time lights, is judging each delay respectively
The data cached size for depositing area is greater than data cached threshold value, is also less than data cached threshold value, if more than step 105 is executed；
If being less than, step 106 is executed.
Step 105: meeting host computer issues control information and notifies corresponding meeting slave computer upload data too fast, so that
Corresponding meeting slave computer reduces data uploading speed；
Step 106: meeting host computer issues control information and notifies corresponding meeting slave computer upload data excessively slow, so that
Corresponding meeting slave computer increases data uploading speed.
For those skilled in the art, it can make other each according to the above description of the technical scheme and ideas
Kind is corresponding to be changed and deforms, and all these change and deform the protection model that all should belong to the claims in the present invention
Within enclosing.
Claims (6)
1. a kind of low delay WIFI conference system, it is characterised in that: it includes meeting host computer and several meeting slave computers；
Each meeting slave computer is for uploading data packet all the way；
Meeting host computer at different starting sample time points for starting to sample each circuit-switched data packet respectively；
Meeting host computer can pass through WIFI hot spot and carry out wireless communication with several meeting slave computers；
Meeting slave computer transmits 320 sampled points, 16bit data using data packet；
The meeting host computer caches each circuit-switched data packet to different buffer areas, from each starting sample time light it is default when
Between after section, the data cached size of each buffer area is compared with data cached threshold value respectively, if data cached size is big
In data cached threshold value, then issues control information and notify corresponding meeting slave computer upload data too fast, so that corresponding meeting
Discussing slave computer reduces data uploading speed；If data cached size is less than data cached threshold value, control information notice pair is issued
It is excessively slow that the meeting slave computer answered uploads data, so that corresponding meeting slave computer increases data uploading speed.
2. low delay WIFI conference system as described in claim 1, it is characterised in that: every two adjacent starting sample time point it
Between for time at equal intervals.
3. low delay WIFI conference system as described in claim 1, it is characterised in that: meeting host computer and meeting slave computer
Sample rate is consistent, and sampling clock is synchronous.
4. low delay WIFI conference system as described in claim 1, it is characterised in that: each meeting slave computer is mono- using UDP
It broadcasts technology and uploads data packet.
5. a kind of low delay WIFI conference method, it is characterised in that: itself the following steps are included:
Step 101: each meeting slave computer respectively uploads data packet all the way；And
Step 102: meeting host computer starts to sample each circuit-switched data packet respectively at different starting sample time points；
This method is further comprising the steps of:
Step 103: meeting host computer caches each circuit-switched data packet to different buffer areas；
Step 104: meeting host computer judges each buffer area from after the preset time period that each starting sample time lights respectively
Data cached size be greater than data cached threshold value, be also less than data cached threshold value, if more than, execute step 105；If small
In execution step 106；
Step 105: meeting host computer issues control information and notifies corresponding meeting slave computer upload data too fast, so that corresponding
Meeting slave computer reduce data uploading speed；And
Step 106: meeting host computer issues control information and notifies corresponding meeting slave computer upload data excessively slow, so that corresponding
Meeting slave computer increase data uploading speed.
6. low delay WIFI conference method as claimed in claim 5, it is characterised in that: be between each starting sample time point
Interval time point.
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| CN105657459B (en) * | 2016-03-14 | 2018-07-10 | 北京学而思教育科技有限公司 | A kind of audio and video data processing method and device |
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|---|---|---|---|---|
| CN101364886A (en) * | 2008-09-18 | 2009-02-11 | 广州飞瑞敖电子科技有限公司 | Wireless meeting system |
| CN101795391A (en) * | 2010-04-15 | 2010-08-04 | 中兴通讯股份有限公司 | Message playing method used for video conference and video conference system |
| CN102026281A (en) * | 2010-12-21 | 2011-04-20 | 大唐移动通信设备有限公司 | Method and device for realizing TCP (transmission control protocol) proxy based on RNC (radio network controller) |
| CN103841361A (en) * | 2014-03-25 | 2014-06-04 | 山西一建集团有限公司 | Communication method for integrating multiple conference systems under low bandwidth |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739412A (en) * | 2012-06-13 | 2012-10-17 | 苏州阔地网络科技有限公司 | Batch scheduling control method and system of information |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364886A (en) * | 2008-09-18 | 2009-02-11 | 广州飞瑞敖电子科技有限公司 | Wireless meeting system |
| CN101795391A (en) * | 2010-04-15 | 2010-08-04 | 中兴通讯股份有限公司 | Message playing method used for video conference and video conference system |
| CN102026281A (en) * | 2010-12-21 | 2011-04-20 | 大唐移动通信设备有限公司 | Method and device for realizing TCP (transmission control protocol) proxy based on RNC (radio network controller) |
| CN103841361A (en) * | 2014-03-25 | 2014-06-04 | 山西一建集团有限公司 | Communication method for integrating multiple conference systems under low bandwidth |
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