CN103648010A - Synchronous flight data and multi-channel video and audio data playback method - Google Patents
Synchronous flight data and multi-channel video and audio data playback method Download PDFInfo
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- CN103648010A CN103648010A CN201310631748.7A CN201310631748A CN103648010A CN 103648010 A CN103648010 A CN 103648010A CN 201310631748 A CN201310631748 A CN 201310631748A CN 103648010 A CN103648010 A CN 103648010A
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Abstract
The invention belongs to the technical field of aviation electronics and particularly relates to a synchronous flight data and multi-channel video and audio data playback method. According to the method, a system structure composed of a main control module and two controlled modules is formed among a flight data playback module, an audio data playback module and a video data playback module, and a TCP/IP protocol is used as an underlying communication basis among the modules. The main control module sends a play time stamp thereof and a system reference time to the controlled modules, and the controlled modules calculates the communication time delay with the use of the system reference time, calculates the play time difference with the use of the play time stamp, calculates the play progress difference by summing the communication time delay and the play time difference and modifies the play progress thereof according to the play progress difference so as to be consistent with the main control module in play progress. The method of the invention enables synchronous playback of flight data, audio data and video data to be realized accurately and stably and can achieve a better visual effect.
Description
Technical field
The invention belongs to avionics field, particularly relate to a kind of flying quality and multichannel audio-video frequency data synchronized playback method.
Background technology
Along with flying to join increasing of record data kind, in ground handling equipment, realizing aggregation of data playback is one of important need of user.Flying quality and multichannel audio-video frequency data synchronized playback can displaying the play three kinds of aggregation of data.At present, the ground playback apparatus of Flight Data Record System for Aircraft is relatively independent, and the replayed section of data does not embody synchronous characteristic, though simultaneously playback of several data in addition, but synchronism between data is poor, there is no perfect synchronization mechanism.Lack in addition a kind of flight data synchronized playback method within the scope of local area network (LAN).
Summary of the invention
Goal of the invention: the object of this invention is to provide a kind of flying quality and multichannel audio-video frequency data synchronized playback method, the process of flying quality playback, audio data playback and video data playback synchronously can be got up preferably, and can be applied to the various data synchronized playbacks in local area network (LAN), solve stationary problem and comprehensive playback problem between various flight datas.
Technical scheme: a kind of flying quality and multichannel audio-video frequency data synchronized playback method, flying quality playback module based on using ICP/IP protocol as bottom communication basis, audio data playback module and video data playback module, operational blocks which partition system in above-mentioned three modules all can be used as main control module and initiates synchronous play command, other modules are for controlled module receives the ready order of the rear feedback of this order, main control module timed sending information lock in time is given each controlled module, controlled module receives after the temporal information of main control module, calculate the time difference between self playing progress rate and main control module playing progress rate, controlled module is adjusted self playing progress rate according to the time difference, the synchronous broadcasting that realizes each intermodule comprises the following steps:
Step (1), determines applied environment, if applied environment is local area network (LAN) scope, needs to calibrate moving respectively each system for computer time of above-mentioned three modules, if applied environment is unit scope, directly enters step (2);
Step (2), main control module is issued controlled module by synchronized playback order by IP and port numbers, and this IP and port numbers are called master control address;
Step (3), controlled module receives after synchronized playback order, be converted to controlled state, whether controlled module inspection self have synchronized playback condition, if controlled module meets synchronized playback condition, return and allow synch command to main control module, otherwise return to the order of refusal synchronized playback to main control module, and return to Reason For Denial code;
Step (4), main control module receives after the feedback of each controlled module, and with opening relationships between the controlled module that allows to synchronize, and the timestamp play of timed sending self and system fiducial time are to controlled module;
Step (5), controlled module receives after the timestamp information of main control module, first the system of obtaining is done the poor communication delay of obtaining with the system time of the main control module receiving fiducial time, then the timestamp that obtains controlled module broadcasting deducts the main control module timestamp receiving, and the reproduction time of obtaining the two is poor;
Step (6), controlled module reproduction time is poor to be deducted communication delay to obtain playing progress rate poor, when playing progress rate is poor while being greater than thresholding, adjusts the playing progress rate of self, otherwise, do not adjust the playing progress rate of controlled module;
Step (7), main control module sends the reproduction time stamp of main control module and system time at that time to controlled module every Fixed Time Interval, and it is poor that controlled module calculates playing progress rate, and adjust self playing progress rate;
Step (8), repeating step (4), to step (7), stops synchronous order until main control module sends, and main control module and controlled module all stop above-mentioned activity.
Described thresholding and Fixed Time Interval are determined according to the data record feature of flying quality, voice data and video data.
Beneficial effect: flying quality of the present invention, voice data and video data synchronized playback can be by flying quality playback module, audio playback module and video data playback module are undertaken synchronously by temporal information, comprehensive data are carried out to playback, accomplish flying quality, voice data and video data are synchronously play, make the user can be comprehensively clearly by flying quality, voice data and video data combine checks analysis, have and contain much information, message complementary sense, video-audio integrated, the features such as information synchronization, regular maintenance to aircraft, the aspects such as flight course synthesization analysis play an important role.
Accompanying drawing explanation
Fig. 1 is that flying quality playback module, audio data playback module and video data playback module are related to schematic diagram;
Fig. 2 is schematic flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details, refers to Fig. 1 to Fig. 2.
The scheme that the present invention adopts is: the flying quality playback module based on using ICP/IP protocol as bottom communication basis, audio data playback module and video data playback module, the transmit port of above-mentioned three modules is all connected with tcp/ip communication bus with receiving port, operational blocks which partition system in three modules all can be used as main control module and initiates synchronous play command, other modules are for controlled module receives the ready order of the rear feedback of this order, main control module timed sending information lock in time is given each controlled module, controlled module receives after the temporal information of main control module, calculate the time difference between self playing progress rate and main control module playing progress rate, controlled module is adjusted self playing progress rate according to the time difference.
Flying quality playback module, audio data playback module, video data playback module are all play separately flying quality, voice data and video data by normal speed, realize so the synchronous broadcasting of each intermodule and need carry out as follows.
Step (1), determines applied environment, if applied environment is local area network (LAN) scope, needs to calibrate moving respectively each system for computer time of above-mentioned three modules, if applied environment is unit scope, directly enters step (2);
Step (2), main control module is issued controlled module by synchronized playback order by IP and port numbers, and this IP and port numbers are called master control address; As shown in Figure 1, for flying quality playback module is as main control module, all the other two modules are as the situation of controlled module;
Step (3), controlled module receives after synchronized playback order, be converted to controlled state, whether controlled module inspection self have synchronized playback condition, if controlled module meets synchronized playback condition, return and allow synch command to main control module, otherwise return to the order of refusal synchronized playback to main control module, and return to Reason For Denial code;
Step (4), main control module receives after the feedback of each controlled module, and with opening relationships between the controlled module that allows to synchronize, and the timestamp play of timed sending self and system fiducial time are to controlled module;
Step (5), controlled module receives after the timestamp information of main control module, first the system of obtaining is done the poor communication delay of obtaining with the system time of the main control module receiving fiducial time, then the timestamp that obtains controlled module broadcasting deducts the main control module timestamp receiving, and the reproduction time of obtaining the two is poor;
Step (6), controlled module reproduction time is poor to be deducted communication delay to obtain playing progress rate poor, when playing progress rate is poor while being greater than thresholding, adjusts the playing progress rate of self, otherwise, do not adjust the playing progress rate of controlled module;
Step (7), main control module sends the reproduction time stamp of main control module and system time at that time to controlled module every Fixed Time Interval, and it is poor that controlled module calculates playing progress rate, and adjust self playing progress rate;
Step (8), repeating step (4), to step (7), stops synchronous order until main control module sends, and main control module and controlled module all stop above-mentioned activity.
Described thresholding and Fixed Time Interval are determined according to the data record feature of flying quality, voice data and video data.In an embodiment, the thresholding in step (6) is 250 milliseconds, and the Fixed Time Interval in step (7) is 1 second.
Flying quality of the present invention, voice data and video data synchronized playback can be by flying quality playback module, audio playback module and video data playback module are undertaken synchronously by temporal information, comprehensive data are carried out to playback, accomplish flying quality, voice data and video data are synchronously play, make the user can be comprehensively clearly by flying quality, voice data and video data combine checks analysis, have and contain much information, message complementary sense, video-audio integrated, the features such as information synchronization, regular maintenance to aircraft, the aspects such as flight course synthesization analysis play an important role.
Claims (2)
1. a flying quality and multichannel audio-video frequency data synchronized playback method, it is characterized in that, flying quality playback module based on using ICP/IP protocol as bottom communication basis, audio data playback module and video data playback module, operational blocks which partition system in above-mentioned three modules all can be used as main control module and initiates synchronous play command, other modules are for controlled module receives the ready order of the rear feedback of this order, main control module timed sending information lock in time is given each controlled module, controlled module receives after the temporal information of main control module, calculate the time difference between self playing progress rate and main control module playing progress rate, controlled module is adjusted self playing progress rate according to the time difference, the synchronous broadcasting that realizes each intermodule comprises the following steps:
Step (1), determines applied environment, if applied environment is local area network (LAN) scope, needs to calibrate moving respectively each system for computer time of above-mentioned three modules, if applied environment is unit scope, directly enters step (2);
Step (2), main control module is issued controlled module by synchronized playback order by IP and port numbers, and this IP and port numbers are called master control address;
Step (3), controlled module receives after synchronized playback order, be converted to controlled state, whether controlled module inspection self have synchronized playback condition, if controlled module meets synchronized playback condition, return and allow synch command to main control module, otherwise return to the order of refusal synchronized playback to main control module, and return to Reason For Denial code;
Step (4), main control module receives after the feedback of each controlled module, and with opening relationships between the controlled module that allows to synchronize, and the timestamp play of timed sending self and system fiducial time are to controlled module;
Step (5), controlled module receives after the timestamp information of main control module, first the system of obtaining is done the poor communication delay of obtaining with the system time of the main control module receiving fiducial time, then the timestamp that obtains controlled module broadcasting deducts the main control module timestamp receiving, and the reproduction time of obtaining the two is poor;
Step (6), controlled module reproduction time is poor to be deducted communication delay to obtain playing progress rate poor, when playing progress rate is poor while being greater than thresholding, adjusts the playing progress rate of self, otherwise, do not adjust the playing progress rate of controlled module;
Step (7), main control module sends the reproduction time stamp of main control module and system time at that time to controlled module every Fixed Time Interval, and it is poor that controlled module calculates playing progress rate, and adjust self playing progress rate;
Step (8), repeating step (4), to step (7), stops synchronous order until main control module sends, and main control module and controlled module all stop above-mentioned activity.
2. a kind of flying quality according to claim 1 and multichannel audio-video frequency data synchronized playback method, is characterized in that, described thresholding and Fixed Time Interval are determined according to the data record feature of flying quality, voice data and video data.
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| CN104469413A (en) * | 2014-12-30 | 2015-03-25 | 中山大学花都产业科技研究院 | Local area network multi-terminal synchronous playing time deviation calculation improving method |
| CN105392024A (en) * | 2015-10-28 | 2016-03-09 | 中国电子科技集团公司第二十八研究所 | Multi-source heterogeneous data synchronous replaying method |
| CN106791534A (en) * | 2016-11-24 | 2017-05-31 | 陕西千山航空电子有限责任公司 | A kind of multi-channel synchronous storage back method of cockpit video-with-audio recording device |
| CN107968942A (en) * | 2017-11-24 | 2018-04-27 | 网易（杭州）网络有限公司 | A kind of live platform audio and video measurement method for time difference and system |
| CN108600815A (en) * | 2018-05-09 | 2018-09-28 | 福建星网视易信息系统有限公司 | A kind of online method and system chorused in real time |
| CN111629246A (en) * | 2019-02-27 | 2020-09-04 | 联咏科技股份有限公司 | Multi-screen synchronous playback system and method thereof |
| CN112084143A (en) * | 2020-08-14 | 2020-12-15 | 陕西千山航空电子有限责任公司 | Synchronous playback platform architecture method for multi-type flight parameter data |
| CN112866755A (en) * | 2020-12-31 | 2021-05-28 | 北京小早科技有限公司 | Video playing method and device, electronic equipment and storage medium |
| CN112907782A (en) * | 2021-02-18 | 2021-06-04 | 江西洪都航空工业集团有限责任公司 | Multisource multi-type data playback device based on time synchronization |
| CN113411679A (en) * | 2021-06-16 | 2021-09-17 | 中国人民解放军91388部队 | Playback method and device of multichannel data, electronic equipment and storage medium |
| CN115119033A (en) * | 2022-06-23 | 2022-09-27 | 北京字跳网络技术有限公司 | Sound-picture synchronization method and device, storage medium and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5826206A (en) * | 1996-03-12 | 1998-10-20 | Training Inovations Group, Llc | Debriefing systems and methods for retrieving and presenting multiple datastreams with time indication marks in time synchronism |
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| CN104469413A (en) * | 2014-12-30 | 2015-03-25 | 中山大学花都产业科技研究院 | Local area network multi-terminal synchronous playing time deviation calculation improving method |
| CN104469413B (en) * | 2014-12-30 | 2017-10-20 | 中山大学花都产业科技研究院 | The improved method that multiple terminals synchronization reproduction time deviation is calculated in a kind of LAN |
| CN105392024B (en) * | 2015-10-28 | 2018-04-24 | 中国电子科技集团公司第二十八研究所 | A kind of multi-source heterogeneous data synchronized playback method |
| CN105392024A (en) * | 2015-10-28 | 2016-03-09 | 中国电子科技集团公司第二十八研究所 | Multi-source heterogeneous data synchronous replaying method |
| CN106791534B (en) * | 2016-11-24 | 2020-09-22 | 陕西千山航空电子有限责任公司 | Multichannel synchronous storage and playback method of cockpit audio and video recorder |
| CN106791534A (en) * | 2016-11-24 | 2017-05-31 | 陕西千山航空电子有限责任公司 | A kind of multi-channel synchronous storage back method of cockpit video-with-audio recording device |
| CN107968942A (en) * | 2017-11-24 | 2018-04-27 | 网易（杭州）网络有限公司 | A kind of live platform audio and video measurement method for time difference and system |
| CN107968942B (en) * | 2017-11-24 | 2021-06-04 | 网易（杭州）网络有限公司 | Method and system for measuring audio and video time difference of live broadcast platform |
| CN108600815A (en) * | 2018-05-09 | 2018-09-28 | 福建星网视易信息系统有限公司 | A kind of online method and system chorused in real time |
| CN108600815B (en) * | 2018-05-09 | 2020-12-29 | 福建星网视易信息系统有限公司 | Method and system for on-line real-time chorus |
| CN111629246A (en) * | 2019-02-27 | 2020-09-04 | 联咏科技股份有限公司 | Multi-screen synchronous playback system and method thereof |
| CN112084143B (en) * | 2020-08-14 | 2023-05-30 | 陕西千山航空电子有限责任公司 | Synchronous playback platform architecture method for multi-type flight parameter data |
| CN112084143A (en) * | 2020-08-14 | 2020-12-15 | 陕西千山航空电子有限责任公司 | Synchronous playback platform architecture method for multi-type flight parameter data |
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