CN106412527A - Hot backup realization method and system with seamless switching of high definition audio and video - Google Patents
Hot backup realization method and system with seamless switching of high definition audio and video Download PDFInfo
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- CN106412527A CN106412527A CN201611065993.6A CN201611065993A CN106412527A CN 106412527 A CN106412527 A CN 106412527A CN 201611065993 A CN201611065993 A CN 201611065993A CN 106412527 A CN106412527 A CN 106412527A
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- 230000004913 activation Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000000306 recurrent effect Effects 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a hot backup realization method and system with the seamless switching of a high definition audio and video. The system comprises a video receiving chip, a video detection module, a video zoom module, a video locking module, a video cache module, a video output module, an audio switching module, and a video transmitting chip. According to the method, the automatic seamless switching of backup audio and video, the problem that a video can not be interrupted in an important scene can be solved, and a user experience is improved. Compared with the prior art, the method is more user-friendly, the experience is better, and the method is more convenient to use.
Description
Technical field
The present invention relates to technical field of audio/video, realize Hot Spare particularly to a kind of seamless switching of high resolution audio and video
Method and system.
Background technology
The mode overwhelming majority that people obtains information is derived from vision, and video can allow people intuitively perceive very much this generation
Boundary.Real-time video shows nearly ubiquitous, market, movie theatre, government organs, Force Command center etc., and be seen everywhere is
Monitor display screen, the information of the riot of color that flows in real time.With the requirement more and more higher to video quality for the people, it is unsatisfactory for
The real-time reality of Standard Definition resolution, pursues the display such as 1920x1080p/60 of higher resolution, and the 4k of even more high differentiates
Rate.
In some important events, it is desirable to video can not interrupt, this requires that video has at such as state leader's person conference scene
Backup functionality, when that is, current video abnormal, can real-time detection arrive, and automatically switches to space signal source it is ensured that meeting
That discusses is smoothed out.And because being momentous conference, need exist for it is emphasised that user can not be allowed to experience exception, thus, seamless
Switching Hot Spare just seems critically important.Common backup functionality is, when current video breaks, selects space signal source, has
When even need manually to go to switch, handoff procedure can blank screen, this just gives one bad experience of user, allows it experience exception
Presence.And seamless switching Hot Spare does not just have this problem, when current demand signal source is abnormal, system can automatically switch to standby
Signal source, due to adopting seamless handover method, does not have black field, user is not felt by being of the presence of an anomaly with.
Content of the invention
The technical problem to be solved in the present invention is, abnormal in current video for prior art, need to manually go to be switched to
Space signal source, or automatically switch to space signal source it may appear that black field defect it is proposed that a kind of high resolution audio and video no
The method and system realizing Hot Spare are changed in seaming and cutting.
The present invention solves described technical problem and be employed technical scheme comprise that：Design a kind of seamless switching of high resolution audio and video
Realize the method for Hot Spare it is characterised in that comprising the steps：
S00 step：Input video 1,2, the difference video signal solution of two-path video is pressed into Transistor-Transistor Logic level by video reception chip
Video data and voice data；
S01 step：Whether the video data of detection two-path video is supported input resolution ratio：If at required
Then it is assumed that this resolution ratio is effective in the input resolving range held, otherwise it is assumed that invalid；
S02 step：Video scaling module will input the scaling resolution ratio of support required for resolution ratio zooms to；
S03 step：Whether video freeze module detection video is stable；Think that this video is effective premise in S01 step
Under, the video synchronization signal of S02 output is counted；Respectively two-path video is detected, if stable, can be selected this
Video frequency output；If unstable, judge whether the 2nd road video is stable, if now the 2nd road video stabilization, select the 2nd road video
Output, realizes backup functionality；If two-path video is all unstable, close output；
S04 step：Video cache module by stable video data continuous write DDR in S03 step, and from DDR
In continuous reading；
S05 step：PCLK, DE, VS, HS signal required for video transmission chip is produced inside Video Output Modules, and
Read the video data of storage in the DDR in S04 step, send it to video transmission chip；
S06 step：Under default situations, Audio conversion module selects the voice data from video 1 to be sent to video transmission
Chip, if exception in video 1, the voice data of Audio conversion module Switch Video 2 to video transmission chip, thus realizing
The switching Hot Spare of audio frequency；So far it is achieved that the seamless switching of audio frequency and video realizes Hot Spare.
Further, the present invention designs the system that a kind of seamless switching of high resolution audio and video realizes Hot Spare, this system bag
Include video reception chip, video detection module, video scaling module, video freeze module, video cache module, video frequency output mould
Block, Audio conversion module and video transmission chip, video reception chip is by the difference video signal of the two-path video inputting respectively
Solution is pressed into video data and the voice data of Transistor-Transistor Logic level, and video detection module detects whether the video data of two-path video is institute
The input resolution ratio supported, if then it is assumed that this resolution ratio effectively, is otherwise recognized in the input resolving range of required support
For invalid；Video scaling module will input the scaling resolution ratio of support required for resolution ratio zooms to.Video freeze module detects
Whether video is stable, and under the premise of video detection module thinks that this video data is effective, video scaling module is to this video counts
According to zooming in and out, video freeze module is counted to the video synchronization signal of the video data after video scaling module scaling
Number, if thinking after counting, this video data is stable, and Ze Jianggai road video data is sent to video cache module and is written and read
Operation；If this video data is unstable, switches another road video data and judged, if stable, by current video data
It is sent to video cache module to be written and read operating, realize video data seamless switching Hot Spare.If two-path video data is not
Stable, then close output.PCLK, DE, VS, HS signal required for video transmission chip is produced inside Video Output Modules, and
From video cache inside modules reading video data, video data is sent to video transmission chip, if current video is normal, sound
Current voice data is then sent to video transmission chip by frequency handover module, if current video is abnormal, Audio conversion module is then
By another road regarding sound data is activation to video transmission chip, thus realizing the seamless switching Hot Spare of voice data.
Compared with prior art, the beneficial effects of the present invention is：Present invention achieves automatic seamless switching backup sound regards
The technology of frequency, can solve the problems, such as to be unable to break of video well in important scenes, improve Consumer's Experience.Than prior art more
Hommization, experience is more preferable, using more convenient.
Brief description
Fig. 1 realizes a kind of operating process of embodiment of method of Hot Spare for a kind of present invention high resolution audio and video seamless switching
Schematic diagram；
Fig. 2 realizes a kind of structured flowchart of embodiment of system of Hot Spare for a kind of present invention high resolution audio and video seamless switching
And operation principle schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
The present invention provide a kind of high resolution audio and video seamless switching realize Hot Spare method (referring to Fig. 1) it is characterised in that
Comprise the steps：
S00 step：Input video 1,2, the difference video signal solution of two-path video is pressed into Transistor-Transistor Logic level by video reception chip
Video data and voice data.It is respectively rgb video data and synchronizing signal PCLK, DE, HS, VS signal of 24bit, with
And voice data SD0 and adopt clock sclk, left and right acoustic channels clock WCLK；
S01 step：Whether the video data of detection two-path video is supported input resolution ratio：In the sampling of PCLK
Under clock, by counting to DE and HS, obtain HTOTAL value, i.e. total pixel of a line, by carrying out to VS and HS
Count, obtain total line number VTOTAL of a frame video.After obtaining HTOTAL and VTOTAL, current input resolution ratio can be learnt
It is how many, if then it is assumed that this resolution ratio is effective in the input resolving range of required support, otherwise it is assumed that invalid；Than
As counted by DE and HS, the HTOTAL value obtaining current video is 1920, counts to get VTOTAL value by VS and HS
For 1080 then it represents that currently inputting resolution ratio is 1920*1080, in supported resolving range.
S02 step：Video scaling module will input the scaling resolution ratio of support required for resolution ratio zooms to.Need exist for
Call the IP storehouse of xilinx.The system adopts the IP storehouse of scaler3.0.This IP realizes the zoom function of video.By calling this
Video can be zoomed in or out another one resolution ratio from a resolution ratio by IP.
S03 step：Whether video freeze module detection video is stable.Can learn that current input is differentiated by S01 step
Effectively whether rate, under the premise of S01 step thinks that this video is effective, count to the video synchronization signal of S02 output.
The synchronizing signal of here to be used is VS, if continuous 8 VS rising edges arrive, S01 step all thinks effectively, then
Think that this input video has been stable, can tell that next module is written and read operating.Respectively two-path video is carried out
Detection, if stable, can select this video frequency output.If unstable, judge that the 2nd road video is whether stable, if now the 2nd
Road video stabilization, selects the 2nd road video frequency output, realizes backup functionality.If two-path video is all unstable, close output.
S04 step：Video cache module (namely dma module) is write continuous for video data stable in S03 step
Enter DDR, and continuous reading from DDR.After S03 step, if video is stable, can be by the video after S02 step
In data write DDR, need exist for writing 4 frame data incessantly.The output of video data needs to be read out from here,
For continual 4 frame data.S03 and S04 is to realize two crucial links of seamless switching Hot Spare.Under default situations, S04
Write data be derived from the 1st road video, when the 1st road video abnormal, the write data of S04 selects to be derived from the 2nd road video,
Thus realizing seamless switching Hot Spare.And the reading of this process, and video frequency output is continuous, user will not experience video
1 is abnormal.Here it is considered that continuous 8 frame lock rules think that video is stable, be output as with common 1920*1080/60HZ
Example, this output refresh rate is 60HZ, and the time of every frame approximates 16.7ms for 1/60s, and 8 frames then approximate 133ms, this time
Pause human eye almost imperceptible.
S05 step：PCLK, DE, VS, HS signal required for video transmission chip is produced inside Video Output Modules, and
Read the video data of storage in the DDR in S04 step, send it to video transmission chip.
S06 step：Under default situations, the voice data from video 1 (i.e. the 1st road video) is selected to be sent to video transmission
Chip, if exception in video 1, the voice data of Audio conversion module Switch Video 2 (i.e. the 2nd road video) is to video transmission
Chip, thus realize the switching Hot Spare of audio frequency.In conjunction with above-mentioned it is achieved that the seamless switching warm standby function of audio frequency and video.
Detect in described S01 step that the video data of two-path video is completed by video detection module.
Further, the present invention provides a kind of seamless switching of high resolution audio and video to realize the system of Hot Spare, this system bag
Include video reception chip, video detection module, video scaling module, video freeze module, video cache module, video frequency output mould
Block, Audio conversion module and video transmission chip, video reception chip is by the difference video signal of the two-path video inputting respectively
Solution is pressed into video data and the voice data of Transistor-Transistor Logic level, and video detection module detects whether the video data of two-path video is institute
The input resolution ratio supported, if then it is assumed that this resolution ratio effectively, is otherwise recognized in the input resolving range of required support
For invalid；Video scaling module will input the scaling resolution ratio of support required for resolution ratio zooms to.Video freeze module detects
Whether video is stable, and under the premise of video detection module thinks that this video data is effective, video scaling module is to this video counts
According to zooming in and out, video freeze module is counted to the video synchronization signal of the video data after video scaling module scaling
Number, if thinking after counting, this video data is stable, and Ze Jianggai road video data is sent to video cache module and is written and read
Operation；If this video data is unstable, switches another road video data and judged, if stable, by current video data
It is sent to video cache module to be written and read operating, realize video data seamless switching Hot Spare.If two-path video data is not
Stable, then close output.PCLK, DE, VS, HS signal required for video transmission chip is produced inside Video Output Modules, and
From video cache inside modules reading video data, video data is sent to video transmission chip, if current video is normal, sound
Current voice data is then sent to video transmission chip by frequency handover module, if current video is abnormal, Audio conversion module is then
By another road regarding sound data is activation to video transmission chip, thus realizing the seamless switching Hot Spare of voice data.
Described video detection module is used for detecting which kind of current input resolution ratio is, video data format is RGB/YUV.
By counting to synchronizing signal HS, VS of video and DE, when VS comes for rising edge, it is 0 that row counts initial value, often
When individual DE rising edge comes, row count value adds up 1, and when next VS comes, row count value now is the line number of current video.In HS
When coming for rising edge, pixel counts initial value is 0, DE is between high period, each clock cycle of pixel counts value cumulative 1, under
When one HS comes, pixel counts value now is the pixel number of current video.By calculating the line number of each frame and every a line
Pixel number, can learn whether current video is normal video.
Described video scaling module is used for inputting video data being zoomed to required output resolution ratio, using xilinx
The integrated algorithm to scale in ip storehouse, user needs to call this IP.The system adopts the IP storehouse of scaler3.0.
Described video freeze module is used for judging whether current video is stable, current video is detected in video detection module
On the premise of video standard signal source, frame synchronizing signal VS is counted, when VS rising edge comes, count value cumulative 1, if
Reach 8, then count value keeps constant. it is non-standard video if there is video, count value clear 0.Stablizing count value when frame is 8,
Then represent that continuous 8 frames of current video are stablized it is believed that current video is stable.
Stable video is write in DDR by described video cache module, recurrent wrIting 4 frame, and 4 frames are read in circulation；To export
As a example resolution ratio is 1920x1200/60, color depth used is 8bit here, RBG common 24bit data, big required for caching one frame
Little approximate 52.7Mbit for 1920*24*1200.
Described Video Output Modules according to output resolution ratio demand, produce synchronizing signal HS, VS required for video sends,
DE and RGB24bit data, delivers to display terminal and is shown；
Described Audio conversion module adopts the voice data of I2S interface, and I2S is mainly made up of three signals, respectively
SCLK, WCLK and SD0 form, and wherein SCLK is the sampling clock of data, and WCLK is left and right acoustic channels clock, and SD0 passes for data
Defeated passage；When identifying that video is input 1, the I2S voice data on switching the 1st tunnel is given to receiving device below, when input regards
When frequency is input 2, the I2S voice data on switching the 2nd tunnel is given to receiving device below.
In a word, in the present embodiment, there is provided a kind of technology of automatic seamless switching backup audio frequency and video, can solve well
Certainly important scenes are unable to break of video, improve Consumer's Experience.More more humane than prior art, experience is more preferable, using more convenient.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of seamless switching of high resolution audio and video realizes the method for Hot Spare it is characterised in that comprising the steps：
S00 step：Input video 1,2, the difference video signal solution of two-path video is pressed into regarding of Transistor-Transistor Logic level by video reception chip
Frequency evidence and voice data；
S01 step：Whether the video data of detection two-path video is supported input resolution ratio：If in required support
Then it is assumed that this resolution ratio is effective in input resolving range, otherwise it is assumed that invalid；
S02 step：Video scaling module will input the scaling resolution ratio of support required for resolution ratio zooms to；
S03 step：Whether video freeze module detection video is stable；Under the premise of S01 step thinks that this video is effective, right
The video synchronization signal of S02 output is counted；Respectively two-path video is detected, if stable, this video can be selected
Output；If unstable, judge whether the 2nd road video is stable, if now the 2nd road video stabilization, select the 2nd road video defeated
Go out, realize backup functionality；If two-path video is all unstable, close output；
S04 step：Video cache module by stable video data continuous write DDR in S03 step, and from DDR not
The reading resting；
S05 step：Produce PCLK, DE, VS, HS signal required for video transmission chip inside Video Output Modules, and read
In DDR in S04 step, the video data of storage, sends it to video transmission chip；
S06 step：Under default situations, Audio conversion module selects the voice data from video 1 to be sent to video transmission chip,
If exception in video 1, the voice data of Audio conversion module Switch Video 2 to video transmission chip, thus realizing audio frequency
Switching Hot Spare；So far it is achieved that the seamless switching of audio frequency and video realizes Hot Spare.
2. a kind of seamless switching of high resolution audio and video according to claim 1 realize Hot Spare method it is characterised in that
Video data after input video 1,2 decompression and voice data respectively the rgb video data of 24bit and synchronizing signal
PCLK, DE, HS, VS signal, and voice data SD0 and adopt clock sclk, left and right acoustic channels clock WCLK.
3. a kind of seamless switching of high resolution audio and video according to claim 1 realize Hot Spare method it is characterised in that
In S01 step, the method for detection video data input resolution ratio is：Under the sampling clock of PCLK, by carrying out to DE and HS
Count, obtain HTOTAL value, i.e. total pixel of a line, by counting to VS and HS, obtain the head office of a frame video
Number VTOTAL；After obtaining HTOTAL and VTOTAL, can learn that current input resolution ratio is how many.
4. a kind of seamless switching of high resolution audio and video according to claim 1 realize Hot Spare method it is characterised in that
Video scaling module adopts the IP storehouse of scaler3.0.
5. a kind of seamless switching of high resolution audio and video according to claim 1 realize Hot Spare method it is characterised in that
Judge in S03 step that the effective method of input video is：Choose synchronizing signal VS, if continuous 8 VS rising edges arrive, S01
Step all thinks effectively, then think that this input video is stable.
6. a kind of seamless switching of high resolution audio and video according to claim 1 realize Hot Spare method it is characterised in that
In S04 step, video cache module by the 4 frame data continuous write DDR of stable video data in S03 step, and from
Continuous reading 4 frame data in DDR.
7. a kind of seamless switching of high resolution audio and video realizes the system of Hot Spare side it is characterised in that being applied to as claim
The seamless switching of the high resolution audio and video described in any one of 1-6 realizes heat backup method, including video reception chip, video detection mould
Block, video scaling module, video freeze module, video cache module, Video Output Modules, Audio conversion module and video transmission
Chip, video reception chip by the difference video signal of the two-path video of input respectively solution be pressed into Transistor-Transistor Logic level video data and
Voice data, video detection module detects whether the video data of two-path video is supported input resolution ratio, if in institute
Need in the input resolving range supported then it is assumed that this resolution ratio is effective, otherwise it is assumed that invalid；Video scaling module will input
The scaling resolution ratio that resolution ratio is supported required for zooming to；Whether video freeze module detection video is stable, in video detection mould
Under the premise of block thinks that this video data is effective, video scaling module zooms in and out to this video data, video freeze module pair
The video synchronization signal of the video data after video scaling module scaling is counted, if thinking this video counts after counting
According to stablizing, Ze Jianggai road video data is sent to video cache module and is written and read operating；If this video data is unstable, cut
Change another road video data to be judged, if stable, current video data be sent to video cache module and be written and read grasping
Make, realize video data seamless switching Hot Spare；If two-path video data is all unstable, close output；Video Output Modules
Internal PCLK, DE, VS, HS signal producing required for video transmission chip, and read video counts from video cache inside modules
According to video data being sent to video transmission chip, if current video is normal, Audio conversion module is then by current voice data
Be sent to video transmission chip, if current video is abnormal, Audio conversion module then by another road regarding sound data is activation to video
Transmitting chip.
8. a kind of seamless switching of high resolution audio and video according to claim 7 realizes the system of Hot Spare side, and its feature exists
In described video detection module is used for detecting which kind of current input resolution ratio is, video data format is RGB/YUV；Pass through
Synchronizing signal HS, VS and DE of video is counted, when VS comes for rising edge, it is 0 that row counts initial value, each DE
When rising edge comes, row count value adds up 1, and when next VS comes, row count value now is the line number of current video；On HS is
Along when coming, pixel counts initial value is 0, DE is between high period to liter, each clock cycle of pixel counts value cumulative 1, next
When HS comes, pixel counts value now is the pixel number of current video；By calculating the line number of each frame and the picture of every a line
Vegetarian refreshments number, can learn whether current video is normal video.
9. a kind of seamless switching of high resolution audio and video according to claim 7 realizes the system of Hot Spare side, and its feature exists
In described video freeze module is used for judging whether current video is stable, current video is detected in video detection module is mark
On the premise of quasi- video signal source, frame synchronizing signal VS is counted, when VS rising edge comes, count value cumulative 1, if reached
8, then count value keep constant. be non-standard video if there is video, count value clear 0；Stablizing count value when frame is 8, then table
Show that continuous 8 frames of current video are stablized it is believed that current video is stable.
10. a kind of seamless switching of high resolution audio and video according to claim 7 realizes the system of Hot Spare side, and its feature exists
In stable video is write in DDR by described video cache module, recurrent wrIting 4 frame, and 4 frames are read in circulation.
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