CN108881989A - A kind of quick plug-flow control method of live streaming TS program and system - Google Patents
A kind of quick plug-flow control method of live streaming TS program and system Download PDFInfo
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- CN108881989A CN108881989A CN201810600809.6A CN201810600809A CN108881989A CN 108881989 A CN108881989 A CN 108881989A CN 201810600809 A CN201810600809 A CN 201810600809A CN 108881989 A CN108881989 A CN 108881989A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
Abstract
The invention discloses a kind of quick plug-flow control method of live streaming TS program and systems, include：Foreground task processing part and background task handle part；Wherein, it is operated by the platform of cutting that foreground task handles part response user, the program stream of processing active user's selection, after receiving program switching command, index reads the pretreated TS stream of background task processing unit and is sent to terminal plays equipment；The request on background task processing part response foreground provides data, and periodic wakeup starts Tuner poll machine, and the sampling of Tuner poll machine caches the TS of each frequency point, provides data required for preanalysis.Disparate modules are handled time parallel by the present invention, are maximized and are reduced time delay, and the information update in energy real-time tracking program information table reduces the analysis time of decoding terminals playout software in background update data buffer zone.
Description
Technical field
The present invention relates to multimedia signal processing transmission technique field, in particular to a kind of quick plug-flow control of live streaming TS program
Method and system.
Background technique
Currently, the MPEG2-TS stream in DVB Transmission system generallys use a kind of serial process from being filled into the process for opening and broadcasting
Process, to realize the encoding and decoding to digital signal, to provide reliable video broadcast service.It is set based on WiFi Dongle
Standby TS program opens in the system of broadcasting, this process from information source input, by WiFi Dongle inter-process, finally by WiFi mould
Block interface is pushed to terminal device and is decoded broadcasting, there are certain idle waiting time, causes to switch in actual program
Stage body brings bad experience to user in testing.
It is varied for the processing scheme of real-time streams live streaming scheme in the market, but substantially all using the serial process of TS stream
Process, to realize the live streaming of real-time TS stream.
However, this serial process process cut bank open broadcast during, most times, which are wasted in, waits each ring
In the processing result of section, switching requires to filter TS stream again every time, carries out TS stream demultiplexing, selects decoder, carry out audio,
Video decoding, finally by decoded audio frame and video requency frame data output display.The waiting time phase of all links in the process
Superposition, the time can achieve 3s ~ 4s, it is therefore desirable to waste the plenty of time, cause user cut stage body test it is very bad.
By taking the audio and video playing of DVB system as an example, in general the audio-video frequency playing system technology tradition of DVB system is used
The realization of serial process process, which is opened, to be broadcast, and required time loss has：The time of Tuner+Demod frequency locking demodulation（Remember Δ TD）, TSP
The time for resetting filter condition and updating（Remember Δ TSP）, the time of wireless network transmitting and receiving data（Remember Δ Send）, analysis section
The time of mesh type setting decoding process（Remember Δ Decode）, time that decoding data to audio-video is shown（ΔPlay）, then go here and there
Δ t1=Δ TD+Δ TSP+Δ Send+Δ Decode+Δ Play between opening sowing time of row agreement.It can be seen that needing to waste
Plenty of time.
In addition, the prior art because of many defect problems such as time delay, lead to the information update of program also not in time.
Therefore in view of the above-mentioned drawbacks of the prior art, it is necessary to carry out developmental research, to provide a kind of scheme, with most
Bigization reduces time delay, and can information update in real-time tracking program information table, reduce point of decoding terminals playout software
Analyse the time.
Summary of the invention
To solve existing technical problem, the present invention proposes a kind of quick plug-flow control method of live streaming TS program, with
Maximize and reduce time delay, and can information update in real-time tracking program information table, reduce decoding terminals playout software
Analysis time.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of quick plug-flow control method of live streaming TS program, includes the following steps：
Step 1：Order reception task response terminal device cuts platform order, is received by WiFi and orders and handle；
Step 2：By background task control non-present play Tuner carry out TS data buffer storage, establish TS stream caching Buffer and
The pre-cache data of Burst TS quick indexing task input are sent to terminal device with maximum bandwidth and receive number by index list
According to progress pre decoding analysis；Foreground task handles the program stream of user's selection in real time, and after receiving program switching command, index is read
The pretreated TS stream of background task is sent to terminal plays equipment；
Step 3：Pre-cache data are periodically updated by Tuner poll machine, it is real-time to take into account data by delimiting period
Update and save cpu performance consumption.When periodic awakening condition meet after, Tuner poll machine start to work, according to index list by
One poll updates all data；
Step 4：Analysis processing TS stream and programme information, correspond to frequency point by the idle index area Tuner and carry out frequency locking, receive number
TV signal simultaneously gives Demod demodulation, obtains TS stream.
Preferably, step 1 further includes：By Tuner poll machine pre-cache program data, Burst TS index when cutting platform
Quick indexing is sent data by task, is supplied to and is interrupted equipment progress pre decoding analysis, parallel to carry out frequency locking demodulation, TSP setting
Filter condition, analysis decoding.
Preferably, step 2 further includes：Terminal device receives the stream of the TS in Burst TS quick indexing task, gives solution
Code unit carries out pre decoding analysis, after analysis to be decoded, setting decoding.
Preferably, step 3 further includes：Judge the lower index area of poll whether is needed to correspond to frequency point update in index list
Pre-cache data, if so, frequency point setting frequency locking and data update will be corresponded to next index area, if not, then it represents that all ropes
Update is completed in the pre-cache data for drawing area, enters standby mode at this time, waits the periodic awakening of next Tuner poll machine
It starts to work.
Preferably, step 4 further includes：Then all program information tables for first filtering frequency point refilter TS stream；Work as Burst
When the head end in manipulative indexing area does not complete caching in TS pre-cache concordance list, then programme information is obtained by filtration according to condition selection
Table, it is otherwise complete to cross filter data, obtain TS stream.
Another technical solution of the present invention is：
A kind of quick plug-flow control system of live streaming TS program includes：Foreground task processing part and background task handle part；
Wherein, it is operated by the platform of cutting that foreground task handles partially response user, the program stream of processing active user's selection is saved when receiving
After mesh switching command, index reads the pretreated TS stream of background task processing unit and is sent to terminal plays equipment；The backstage
The request on task processing part response foreground provides data, and periodic wakeup starts Tuner poll machine, and Tuner poll machine is adopted
Sample caches the TS of each frequency point, provides data required for preanalysis.
The beneficial effect of technical solution of the present invention is：
Disparate modules are handled time parallel by the present invention, are maximized and are reduced time delay, and in energy real-time tracking program information table
Information update reduce the analysis time of decoding terminals playout software in background update data buffer zone.
Detailed description of the invention
Fig. 1 is the process diagram of the present invention live streaming quick plug-flow control method of TS program.
Fig. 2 is the foreground task processing part of module of another embodiment of the present invention live streaming quick plug-flow control system of TS program
Block diagram.
Fig. 3 is the background task processing part of module of another embodiment of the present invention live streaming quick plug-flow control system of TS program
Block diagram.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction with the embodiment of the present invention and attached
Figure, is described in detail technical solution of the present invention.
Include the following steps as shown in Figure 1, the quick plug-flow control method of TS program is broadcast live in the present invention：
Step 1:Order reception task response terminal device cuts platform order, is received by WiFi and orders and handle.
Specifically, by Tuner poll machine pre-cache program data, Burst TS index task is by quick indexing when cutting platform
Data are sent, is supplied to and interrupts equipment progress pre decoding analysis, filter condition, analytic solution is arranged in parallel progress frequency locking demodulation, TSP
Code opened between sowing time：
Δt2 = max(ΔTD, ΔTSP, ΔSend + ΔDecode) + ΔPlay
Wherein, Δ TD is the time of frequency locking demodulation, and Δ TSP is the time that TSP resets filter condition and updates, and Δ Send is wireless
Network transmits and receives the time of data, and Δ Decode is the time for analyzing program category setting decoding process, and Δ Play is decoding
The time that data are shown to audio-video.It can be seen that the time opened and broadcast is greatly saved, that is, when saving waiting when cutting platform
Between.In this step, order receives an assignment receive and cut platform order after, sync response is cut platform and ordered by Burst TS quick indexing task
It enables, starts to index corresponding data.
Order reception task sends the frequency point information for cutting platform program to Tuner frequency locking task, plays the Tuner of program to this
Frequency point carries out frequency locking and receives digital television signal, while setting filter condition to only to filter actual program.The number that will be received
Word TV signal is demodulated, and is input in filtration duty and is filtered according to filter condition after obtaining TS stream.According to set
Filter condition, the TS stream carry out condition selection filtering that demodulation is obtained obtains program information data and program corresponding TS stream.
Step 2：Non-present is controlled by background task and plays Tuner progress TS data buffer storage, establishes TS stream caching
The pre-cache data that Burst TS quick indexing task inputs are sent to terminal with maximum bandwidth and set by Buffer and index list
The standby data that receive carry out pre decoding analysis, after being filled into actual program TS stream in step 1, are changed to the reality according to the program
Code rate starts to send these data.
Foreground task handles the program stream of user's selection in real time, and after receiving program switching command, index reads background task
Pretreated TS stream is sent to terminal plays equipment；The currently playing real-time TS of Tuner progress is controlled simultaneously and flows through filter, is sent to
Terminal.
Terminal device receives the stream of the TS in Burst TS quick indexing task, gives decoding unit and carries out pre decoding analysis, to
After Decoding Analysis, setting decoding.After receiving the real-time TS stream of actual program, directly start to decode.
For Burst TS quick indexing task after order reception task receives and cuts platform order, sync response starts quick rope
Draw, the program that platform broadcasting is cut in acquirement corresponds to frequency point, and frequency point information corresponding with index area each in index list is compared.If two
A frequency point mismatch then indexes next frequency point area.After frequency point compares successfully, the position of manipulative indexing area pre-cache data is taken out
It sets.Pre-cache data are transferred to WiFi and send task, sends cut the data that platform program corresponds to frequency point in advance.
Step 3: periodically updating by Tuner poll machine to pre-cache data, data are taken into account by delimiting period
Real-time update and saving cpu performance consumption, after periodic awakening condition meets, Tuner poll machine is started to work, according to index column
Poll updates all data to table one by one.
Judge that whether needing the lower index area of poll to correspond to frequency point in index list updates pre-cache data, if so, will
Frequency point setting frequency locking is corresponded to next index area and data update, if not, then it represents that the pre-cache data of all index areas are
It completes to update, enters standby mode at this time, the periodic awakening of next Tuner poll machine is waited to start to work.
Step 4: analysis processing TS stream and programme information
There is no locking to cut the Tuner that platform plays program frequency point in double Tuner（Referred to as：Idle Tuner）Frequency point is corresponded to index area
Frequency locking is carried out, digital television signal is received and gives Demod demodulation, obtains TS stream.
It carries out intellectual analysis processing TS stream and programme information specifically first filters all program information tables of frequency point, then
Refilter TS stream.When the head end in manipulative indexing area in Burst TS pre-cache concordance list（Program information table is stored in head end）It is not complete
When at caching, then program information table is obtained by filtration according to condition selection, it is otherwise complete to cross filter data, obtain TS stream.
By the index area Burst TS head end any buffered program information table data, continues to cache if not completing, judge whether
Need to cache next index area；The full filtering of setting is returned if completing.It is carried out after the full filtering of setting, Burst TS index area TS stream
Caching, replenishes behind head end buffer area, and the data of entire corresponding frequency point index area are collectively formed with head end data.Work as Tuner
After all data that poll machine completes index list manipulative indexing area update, into standby mode.
Referring to shown in Fig. 2, Fig. 3, another embodiment of the present invention is a kind of quick plug-flow control system of live streaming TS program, is passed through
Foreground task processing part response user's cuts platform operation, handles the program stream of active user's selection, background task handles part
The request for responding foreground provides data, and periodic wakeup starts Tuner poll machine, and the sampling of Tuner poll machine caches each frequency point
TS, data required for preanalysis are provided.
Specifically, the program stream of foreground task processing part processing user selection in real time, after receiving program switching command,
Index reads the pretreated TS stream of background task processing unit and is sent to terminal plays equipment.It includes command response module, connects
Meet the Tuner poll machine of command response module output and the place of Burst TS pre-cache module, the output of bind command respond module
Reason module, the transmission module for connecing processing module output.Wherein, the processing module include frequency locking unit, demodulating unit,
And filter element, the transmission module are WiFi module, wirelessly connect terminal plays equipment.
The command response module is responsible for analyzing the user's operation that WiFi is received, and correlation module is called to execute order.
When user is when switching current playing program to another program, command response module receives the message, sends out respectively to processing module
Message is sent, including sending the frequency point that frequency locking unit Tuner needs to lock to frequency locking unit, sends filter element to filter element
The filter condition that TSP needs.Meanwhile command response module also sends request to backstage caching task, provides frequency point information.
Each frequency point TS stream of backstage Tuner poll, establishes the storage management of Buffer index list and stream.The Burst TS
Pre-cache module carries out program information table PSI, the pretreatment such as SI（I.e. PSI table describe program relevant information such as encryption information,
Audio/video information, authorization message etc., SI table describe the event information of program, such as the classification of upgrade event, program service）,
It is fast with maximum bandwidth according to the corresponding Buffer buffered data of frequency point information quick indexing after the request for receiving foreground task
Speed push is data cached to carry out preanalysis to terminal plays equipment.
The frequency locking unit (Tuner) is responsible for carrying out frequency locking to specific frequency point and receives digital television signal, gives solution
Unit (Demodulator) is adjusted to be handled.The demodulating unit (Demodulator) is responsible for the number for receiving Tuner
TV signal is demodulated, and is obtained the TS stream of specific format, is given filter element and handled.The filter element is responsible for solve
The data being transferred to carry out condition selection, and the data for filtering needs give WiFi module.
The WiFi module is divided into two parts, respectively sends and receives.When transmission, the Burst TS of backstage response is sent
Terminal plays equipment is given with the actual program TS of foreground task；When receiving, the order of terminal plays equipment is received, such as cuts platform life
It enables.Terminal plays equipment receives the Burst TS progress pre decoding analysis that WiFi Dongle is sent and actual program TS stream carries out
Decoding plays.
Background task processing unit tap receives the request that foreground task is sent, and inputs frequency point information.Believed according to the program of request
Breath quickly searches indexed cache Buffer, and TS stream is quickly output to WiFi transmission unit.
Specifically, the background process part includes Burst TS pre-cache and quick indexing module, backstage Tuner poll
Machine, wherein the backstage poll machine includes poll frequency point unit, frequency locking unit, demodulating unit and filter element.
In the embodiment of the present invention, the Burst TS pre-cache and quick indexing module foreground task are readable（Order and sound
It answers）, background task is read-write, and index area is created or updated according to Tuner poll machine, and dynamic adjusts buffer size.Wherein, often
The corresponding frequency point in a index area, the program information table of Burst TS pre-cache Yu quick indexing module the smart allocation frequency point are slow
It is punched in the head end of index area, supplements TS flow data backward.After receiving the request of foreground task, at quick indexing to the frequency point
Data are output to WiFi transmission unit.
The poll frequency point unit is responsible for reading the index information in Burst TS pre-cache module, obtains needing to update pre-
Data cached frequency point is arranged non-broadcasting Tuner and receives digital television signal；The DTV that the frequency locking unit will receive
Signal issues demodulating unit；TS stream after demodulation is sent to filter element by the demodulating unit, carries out condition selection filtering, intelligence
Program information table data can be selected, TS stream is then filtered.Pass through above-mentioned poll frequency point unit, frequency locking unit, demodulating unit and mistake
After filtering cell processing, obtained data are input to Burst TS pre-cache and write with quick indexing module by backstage Tuner poll machine
To manipulative indexing area.
Be provided with periodic awakening in the embodiment of the present invention, there are definable period distances, meet a cycle when
Between after, wake up background task execute data update, with reduce cpu performance consumption.Background task completes the data of all frequency points more
After new, standby idle state is initially entered, carries out countdown, next cycle is waited to wake up.
As another embodiment of the present invention, the index structure of Tuner poll machine can be refined, by increasing background task content
Intellectual analysis TS data distinguish each program under each frequency point, to accurately carry out subregion to each program under each frequency point
It saves, program TS stream is only sent after cutting platform, reduces certain bandwidth consumption.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of quick plug-flow control method of live streaming TS program, which is characterized in that include the following steps：
Step 1：Order reception task response terminal device cuts platform order, is received by WiFi and orders and handle；
Step 2：By background task control non-present play Tuner carry out TS data buffer storage, establish TS stream caching Buffer and
The pre-cache data of Burst TS quick indexing task input are sent to terminal device with maximum bandwidth and receive number by index list
According to progress pre decoding analysis；Foreground task handles the program stream of user's selection in real time, and after receiving program switching command, index is read
The pretreated TS stream of background task is sent to terminal plays equipment；The currently playing real-time TS of Tuner progress is controlled simultaneously to flow through
Filter, is sent to terminal；
Step 3：Pre-cache data are periodically updated by Tuner poll machine, it is real-time to take into account data by delimiting period
Update and save cpu performance consumption, when periodic awakening condition meet after, Tuner poll machine start to work, according to index list by
One poll updates all data；
Step 4：Analysis processing TS stream and programme information, correspond to frequency point by the idle index area Tuner and carry out frequency locking, receive number
TV signal simultaneously gives Demod demodulation, obtains TS stream.
2. the quick plug-flow control method of live streaming TS program according to claim 1, which is characterized in that step 1 further includes：
By Tuner poll machine pre-cache program data, quick indexing is sent data by Burst TS index task when cutting platform, is supplied to
It interrupts equipment and carries out pre decoding analysis, it is parallel to carry out frequency locking demodulation, TSP setting filter condition, analysis decoding.
3. the quick plug-flow control method of live streaming TS program according to claim 1, which is characterized in that step 2 further includes：
Terminal device receives the stream of the TS in Burst TS quick indexing task, gives decoding unit and carries out pre decoding analysis, to be decoded
After analysis, setting decoding.
4. the quick plug-flow control method of live streaming TS program according to claim 1, which is characterized in that step 3 further includes：
Judge that whether needing the lower index area of poll to correspond to frequency point in index list updates pre-cache data, if so, will be to next rope
To draw area and correspond to frequency point setting frequency locking and data update, if not, then it represents that update is completed in the pre-cache data of all index areas,
Enter standby mode at this time, the periodic awakening of next Tuner poll machine is waited to start to work.
5. the quick plug-flow control method of live streaming TS program according to claim 1, which is characterized in that step 4 further includes：
Then all program information tables for first filtering frequency point refilter TS stream；When manipulative indexing area in Burst TS pre-cache concordance list
Head end do not complete caching when, then according to condition selection program information table is obtained by filtration, otherwise it is complete cross filter data, obtain TS
Stream.
6. a kind of quick plug-flow control system of live streaming TS program, which is characterized in that include：Foreground task processing part and backstage
Task handles part；Wherein, it is operated by the platform of cutting that foreground task handles part response user, the section of processing active user's selection
Mesh stream, after receiving program switching command, index reads the pretreated TS stream of background task processing unit and is sent to terminal plays
Equipment；The request on background task processing part response foreground provides data, and periodic wakeup starts Tuner poll machine,
The sampling of Tuner poll machine caches the TS of each frequency point, provides data required for preanalysis.
7. the quick plug-flow control system of live streaming TS program according to claim 6, which is characterized in that at the foreground task
Reason part includes：The Tuner poll machine and Burst TS pre-cache mould that command response module, bind command respond module export
Block, bind command respond module output processing module, connect processing module export transmission module.
8. the quick plug-flow control system of live streaming TS program according to claim 7, which is characterized in that the processing module packet
Frequency locking unit, demodulating unit and filter element are included, the transmission module is WiFi module, is wirelessly connected
Terminal plays equipment.
9. the quick plug-flow control system of live streaming TS program according to claim 8, which is characterized in that the background process portion
It point include Burst TS pre-cache and quick indexing module, backstage Tuner poll machine, wherein the backstage poll machine includes
Poll frequency point unit, frequency locking unit, demodulating unit and filter element.
10. the quick plug-flow control system of live streaming TS program according to claim 9, which is characterized in that the poll frequency point
Unit is responsible for reading the index information in Burst TS pre-cache module, obtains the frequency point for needing to update pre-cache data；It is described
The digital television signal received is issued demodulating unit by frequency locking unit；TS stream after demodulation was sent to by the demodulating unit
Unit is filtered, condition selection filtering is carried out；After being handled by poll frequency point unit, frequency locking unit, demodulating unit and filter element, after
Obtained data are input to Burst TS pre-cache with platform Tuner poll machine and quick indexing module writes manipulative indexing area.
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| CN113504933A (en) * | 2021-05-28 | 2021-10-15 | 曲阜师范大学 | Workshop machine updating method and system |
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| CN110996162A (en) * | 2019-12-12 | 2020-04-10 | 国微集团(深圳)有限公司 | Seamless switching playing method of multi-program audio and video stream and media player |
| CN113504933A (en) * | 2021-05-28 | 2021-10-15 | 曲阜师范大学 | Workshop machine updating method and system |
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