CN106060080A - Medical video signal collection and transcoding system - Google Patents
Medical video signal collection and transcoding system Download PDFInfo
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- CN106060080A CN106060080A CN201610544843.7A CN201610544843A CN106060080A CN 106060080 A CN106060080 A CN 106060080A CN 201610544843 A CN201610544843 A CN 201610544843A CN 106060080 A CN106060080 A CN 106060080A
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Classifications
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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
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/762—Media network packet handling at the source
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/136—Incoming video signal characteristics or properties
- H04N19/137—Motion inside a coding unit, e.g. average field, frame or block difference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
- H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440236—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by media transcoding, e.g. video is transformed into a slideshow of still pictures, audio is converted into text
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Abstract
The invention relates to a medical video signal collection and transcoding system, sequentially comprising a video collection unit, a video processing unit, a video compression coding unit and a media streaming service unit, connected via an I/O bus; according to the medical video signal collection and transcoding system provided by the invention, the technical problem that how to collect and process various standard and nonstandard videos output by various medical devices in hospitals for live broadcast is solved, and thus a user can watch multi-path video images with different contents on one terminal. The user can watch the video movably at any time on a handset via a 4G network, and thus the user experience is improved.
Description
Technical field
The present invention relates to the transmission of video images technical field for tele-medicine, be specifically related to a kind of medical video signal
Gather trans-coding system.
Background technology
In China, the application of the video capture devices such as all kinds of video frequency collection cards, DVR makes tele-medicine efficiency
It is greatly improved.What many medical treatment R&D teams let slip no opportunity seeks various technological means.Various for realizing medical imaging, video etc.
The most therefore medical signal high-efficiency transfer, the compatibility of all kinds of video capture devices, efficiently become focus of attention.
In the middle of practical application, we are it can be seen that the video output formats of all kinds of armarium is multifarious, convention video
Collecting device is more tends to nonstandard form.When in the face of hospital all kinds of various, during the different armarium of brand, conventional way is
Inquire the engineer of this producer, understand video output interface and signal format, the parameter etc. of this equipment.Need for this equipment
It is equipped with special collecting device.And when hospital needs the signal receiving miscellaneous equipment, equipment before this is likely to mate.
Thus need the work before again repeating, again buy new equipment.Such result one is the waste of fund, two be by
In these equipment owing to not customizing production, can only be scattered be placed in by the service of connection devices, it is impossible to fixed installation, do not only take up
Space, and cause the probability of damage to be also greatly improved.
It addition, in practical application, it has been found that the video image used in tele-medicine have field (back of the body) scape fix,
The feature that picture is the least, also has definition height, stability height and the requirement of low latency.At present straight towards consumer level market
Broadcast system and its coding, coding/decoding method can not be well adapted for the characteristics of demand of tele-medicine.In transmission and format transformation
There is the factors such as poor definition, incompatible, easy decay so that at signal at the image after long-distance transmissions, regard
Frequently quality becomes fuzzy, shake etc., strong influence uses.Especially transmit under the more severe communication environments such as wireless network
Time, often as the reasons such as packet loss cause picture stuck or fuzzy, it is impossible to reach the level required for tele-medicine.
Summary of the invention
The technical problem to be solved in the present invention (one) is: proposes a kind of solution processed based on high-definition video signal and all kinds of regards
Frequently the medical video signals collecting trans-coding system of collecting device compatibling problem.
The technical problem to be solved in the present invention (two) is: how to provide relatively stable and relatively high-resolution under severe communication environment
Degree video-transmission problems.
The present invention solves that the technical scheme that above-mentioned technical problem () proposes is: a kind of medical video signals collecting transcoding
System, includes video acquisition unit, video processing unit, video compression coding unit and the stream being connected by I/O bus successively
Media services unit；
Described video acquisition unit includes that acquisition module and output module, described acquisition module are used for being connected to existing various medical treatment
The video output terminals of equipment also carries out multichannel video-on-demand signal collection, and described output module is for will by described acquisition module i.e.
Time every road raw video signal of collecting after sequential arranges, in the way of real-time streaming, be transferred to described video processing unit；
Described video processing unit is used for being changed into HD-SDI form after described raw video signal is carried out parameter processing,
Including and sequentially form signal connect video resolution adjusting module, video frame rate adjusting module, code check adjusting module and HD-
SDI transcoding module；
Described video compression coding unit forms video streaming for aforementioned HD-SDI format video signal is compressed coding
Media；
Described streaming media service unit is for being connected to live decoding terminal by cable network or wireless network.
Further, the coding standard of described streaming video is H.265 standard.
Further, the output video resolution of described video resolution adjusting module is that 1280 pixels take advantage of 720 pixels, institute
The adjustment frame per second stating video frame rate adjusting module is 50 Hz-60Hz, and the adjustment bit rate output of described code check adjusting module is 1
Mbps -2Mbps。
The present invention solves that the technical scheme that above-mentioned technical problem (two) proposes is: further, described video compress is compiled
Code unit includes that primitive frame memory module, reference frame handling module, reference frame cache module, agglomerate take off module, agglomerate caching
Module, agglomerate interframe movement trend cache module, present frame reconstructed module, the second present frame reconstructed module, agglomerate motion compensation
Computing module, agglomerate interframe deformation prediction module, agglomerate deformation compensation calculation module, coding module and buffer zone module.
Further, the primitive frame image being pre-stored with under pure background scene in described primitive frame memory module；
Reference frame handling module captures a two field picture after the N frame of each interval as reference frame, and the span of N is 0-60；
Agglomerate takes off module for taking off out the agglomerate image with actual content in reference frame image and by this lumpy pattern
Information be input in agglomerate cache module temporary；
Agglomerate interframe movement prediction module meets in reference frame for gathering the image after being positioned at reference frame searching wherein
The lumpy pattern of lumpy pattern feature, so calculate this lumpy pattern relatively in reference frame time motion vector, and should
Motion vector is sent in present frame reconstructed module as agglomerate motion prediction vectors；
Present frame reconstructed module is used for constructing virtual current frame image, containing virtual lumpy pattern in virtual current frame image；
Agglomerate motion compensation calculations module is used for gathering actual current frame image, and by actual current frame image and virtual present frame
Compare inspection, calculate in virtual lumpy pattern and actual current frame image the alternate position spike between lumpy pattern anchoring group
Block motion prediction vectors calculates agglomerate motion compensation difference；
Agglomerate interframe deformation prediction module meets in reference frame for gathering the image after being positioned at reference frame searching wherein
The lumpy pattern of lumpy pattern feature, so calculate this lumpy pattern relatively in reference frame time agglomerate deformation tendency ginseng
Number, and described agglomerate deformation tendency parameter is exported to the second present frame reconstructed module, described second reconstructed module is used for building
Going out virtual current frame image, containing virtual lumpy pattern in virtual current frame image, agglomerate deformation compensation calculation module gathers real
Border current frame image is also compared with lumpy pattern in aforementioned virtual current frame image, calculates the agglomerate about lumpy pattern
Deformation compensates residual value；
Buffer zone module is mended for depositing primitive frame image and the described lumpy pattern information of encoded module coding, agglomerate motion
Repay difference and agglomerate deformation compensates residual value.
Further, live decoding terminal has buffer location and decoding unit, decoding unit include decoder module,
Two primitive frame memory modules, the second agglomerate cache module, agglomerate motion compensation feedback module, agglomerate deformation Compensation Feedback module,
Second agglomerate interframe movement prediction module, agglomerate interframe movement trend cache module, the second agglomerate interframe deformation prediction module, group
Block interframe deformation tendency cache module and the 3rd present frame reconstructed module.
Further, the second primitive frame memory module reads primitive frame image from buffer location, and in this, as
First two field picture during video playback；
Decoder module compensates for reading lumpy pattern information, agglomerate motion compensation difference and agglomerate deformation from buffer location
Residual value is also separately sent to the second agglomerate cache module, agglomerate motion compensation feedback module and agglomerate deformation compensation instead after the decoding
Feedback module；
Second agglomerate cache module, agglomerate motion compensation feedback module and agglomerate deformation Compensation Feedback module will receive respectively
Lumpy pattern information, agglomerate motion compensation difference and agglomerate deformation compensate residual value and are loaded into the 3rd present frame reconstructed module；
Second agglomerate interframe movement prediction module and the agglomerate motion prediction vectors of the second agglomerate interframe deformation prediction module and group
Block deformation tendency parameter result of calculation loads the most respectively to the 3rd present frame reconstructed module, the second agglomerate interframe movement prediction module
Also agglomerate motion prediction vectors and agglomerate deformation tendency parameter are separately input to group with the second agglomerate interframe deformation prediction module
Block interframe movement trend cache module and agglomerate interframe deformation tendency cache module；
3rd present frame reconstructed module is suitable in reconstruct when the current frame, first read the primitive frame figure in the second primitive frame memory module
Picture, then read the lumpy pattern information in the second agglomerate cache module, by combining agglomerate motion prediction vectors and agglomerate deformation
Trend and agglomerate motion compensation difference and agglomerate deformation compensation residual value carry out the picture of present frame and reconstruct and export.
Further, described agglomerate takes off module when taking off agglomerate in reference frame image, first by reference frame image and
Primitive frame image resolves into the some macro blocks of various level and some microliths, then by reference all in accordance with colourity and the brightness of image
Two field picture and primitive frame image overlapping contrast remove repeatable block, retain difference block, and the set of the difference block retained is defined as group
Block, lumpy pattern information includes aforementioned differences block coordinate in reference frame, colourity, luminance parameter.
Further, described agglomerate interframe deformation prediction module and the second agglomerate interframe deformation prediction module are calculating agglomerate
The chroma luminance parameter of each microlith in the deformation parameter of agglomerate pattern edge profile and lumpy pattern is investigated during deformation tendency parameter.
The invention has the beneficial effects as follows:
First medical video signals collecting trans-coding system in the present invention solves and how to be exported by various armarium in hospital
Various standards or non-standard video be acquired and process after for live technical problem so that user is an end
End can watch that multichannel has the video pictures of different content.User can be carried out momentarily at mobile phone terminal by 4G network
" move " viewing, improve Consumer's Experience.
Next also solves how to meet medical video transmission stability requirement and in more severe network communications environment
Under the conditions of can still provide for the technical problem of transmission of high-quality video, the medical video signals collecting trans-coding system in the present invention is only
Wound develops a kind of compressed encoding unit, and this compressed encoding unit utilizes medical video to have the spy that scene is fixing and the least
Point, by first intercepting " agglomerate " of motion, is then superimposed with the means of lumpy pattern on clean background frames, has reached to reduce
Transmission of video data volume.
Separately it is worth mentioning that: use identical motion prediction and deformation prediction module at local side with decoding end, at this
Adjustment parameter is transferred to decoding end meet the adjustment of real image to predicting the outcome after by ground end.Decoding end passes through this adjustment
It is predicted the outcome and is adjusted by parameter so that it is the image of final display is identical with the image collected of local side.Ensureing
Transmission of video data volume (only needing transmission to adjust parameter) is further reduced on the premise of video quality.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the medical video signals collecting trans-coding system of the present invention is described further.
Fig. 1 is the overall structure schematic diagram of medical treatment video signal collective trans-coding system in the present invention；
Fig. 2 is the structure and working principle schematic diagram of video compression coding unit in the present invention；
Fig. 3 is that agglomerate takes off the module decomposing schematic representation to reference frame image；
Fig. 4 is the structure and working principle schematic diagram of live decoding terminal.
Detailed description of the invention
Embodiment one
According to Fig. 1, Fig. 2, the medical video signals collecting trans-coding system in the present invention, include successively by I/O bus phase
Video acquisition unit, video processing unit, video compression coding unit and streaming media service unit even.
Video acquisition unit includes acquisition module and output module.Acquisition module is that the hardware purchased is adopted in the present embodiment
Truck, hardware capture card is provided with multichannel input interface, and hardware capture card is by coaxial cable, optical fiber cable or other wired lines
Cable is connected on the video output terminals of various armarium, for carrying out the video-on-demand signal collection of multichannel.Output module is
Adding the process chip being located on hardware capture card and the output port being connected with this process chip, being used for will be instant by acquisition module
The every road raw video signal collected is transferred to video processing unit, transmission Shi Mei road raw video signal after sequential arranges
For continuous print frame.
Video processing unit is for being changed into HD-SDI form after raw video signal is carried out parameter processing.Wherein
Including sequentially forming video resolution adjusting module, video frame rate adjusting module, code check adjusting module and the HD-that signal connects
SDI transcoding module.
The resolution of every two field picture of every road raw video signal is all adjusted to 1280 pictures by video resolution adjusting module
Element takes advantage of 720 pixels.When the resolution of the two field picture of primary signal is less than this resolution, carry out interpolation calculation so that it is expand to
1280 pixels take advantage of 720 pixels, when the resolution of the two field picture of primary signal is more than this resolution, carries out resolution compression, make
It is reduced to 1280 pixels and takes advantage of 720 pixels.Video frame rate adjusting module is for believing the original video after resolution adjustment
Number frame per second be adjusted so that it is there is the frame per second of 50HZ-60HZ, the code check adjusting module code check to whole raw video signal
Parameter is adjusted the preset value of 1Mps-2Mps.
HD-SDI transcoding module is for carrying out transcoding to whole raw video signals so that it is become regarding of HD-SDI form
Frequency evidence.
Video compression coding unit forms video streaming for aforementioned HD-SDI format video signal is compressed coding
Media.
Certain redundancy is spatially there is, between the neighbor of the most same object video due to video sequence
Dependency is extremely strong.Secondly, for video sequence, unless occurrence scene switching, otherwise time upper follow-up frame usually contains
The background identical with being above close to frame and object, here it is the time redundancy of video sequence.Before keeping certain video quality
Put, after the huge compressed coding of original video of original data amount can be made, reduce as far as possible so that it is be more suitable for network limited
The transmission of bandwidth, is more favorable to quick repeats when there is packet loss.
Owing to medical video has scene to change hardly, especially the collection video of Medical Instruments is the most such as
This, therefore can utilize this feature to carry out video compress to greatest extent.In the present embodiment about video compression coding unit
There is provided a kind of preferably scheme, in the present embodiment: video compression coding unit includes that primitive frame memory module, reference frame capture
Module, reference frame cache module, agglomerate take off module, agglomerate cache module, agglomerate interframe movement trend cache module, present frame
Reconstructed module, agglomerate motion compensation calculations module, agglomerate interframe deformation prediction module, agglomerate deformation compensation calculation module, coding
Module and buffer zone module.
Wherein, primitive frame memory module is pre-stored with the primitive frame image under pure background scene.
Reference frame handling module for capture the second two field picture (" the second frame " only for convenience of in conjunction with the accompanying drawings,
In concrete application, " the second frame " reality is X+1 frame, lower same) as reference frame, the present embodiment is preset in the reference frame captured
Containing the substantial image (such as the parameter curve in electrocardiogram indicator or the actual scene in operating room) beyond having powerful connections, reference frame
Handling module can be preset to be spaced after N frame and capture, it is also possible to be preset to capture continuously, view network transmission environment and to regarding
Frequently depending on the demand of quality, when network environment preferably or to video quality requirement higher time can be arranged to edge and capture or N value
Becoming little, the span of N is 0-60.Reference frame after crawl is deposited in reference frame cache module standby.
Agglomerate takes off module by by former with primitive frame memory module of the reference frame image in reference frame cache module
Beginning two field picture carries out overlapping contrast, and then takes off out the agglomerate image with actual content.
When taking off as it is shown on figure 3, first reference frame image and primitive frame image are divided according to colourity and the brightness of image
Solution becomes the some macro blocks of various level and some microliths, and then overlapping contrast removes repeatable block, retains difference block, the difference retained
The set of different piece is defined as agglomerate, and lumpy pattern information includes aforementioned differences block coordinate in reference frame, colourity, brightness etc.
Relevant parameter.Supply lumpy pattern information temporary storage in agglomerate cache module to call.As shown in Figure 3, the present embodiment is rolled into a ball
Block is five-pointed star case.
It is special that agglomerate interframe movement prediction module collection the 3rd two field picture wherein searching meet aforementioned lumpy pattern information
The lumpy pattern levied, and then calculate agglomerate in the 3rd frame relative to motion vector during at the second frame, and by this motion vector
It is sent in present frame reconstructed module as agglomerate motion prediction vectors, is used for constructing virtual current frame image (the 4th frame),
Containing virtual agglomerate in virtual current frame image.
Agglomerate motion compensation calculations module gathers actual current frame image, and by actual current frame image and virtual present frame
Compare inspection, calculate in virtual agglomerate and actual current frame image the alternate position spike between agglomerate and to combine agglomerate motion pre-
Direction finding gauge calculates agglomerate motion compensation difference.
It is special that agglomerate interframe deformation prediction module collection the 3rd two field picture wherein searching meet aforementioned lumpy pattern information
The lumpy pattern levied, calculates in the 3rd frame lumpy pattern relative to the agglomerate deformation of the lumpy pattern information in agglomerate cache module
Trend parameter, investigates in the deformation parameter of agglomerate pattern edge profile and lumpy pattern each micro-when calculating agglomerate deformation tendency parameter
The chroma luminance parameter of block.Agglomerate deformation tendency parameter is exported the second present frame reconstruct mould by agglomerate interframe deformation prediction module
Block, by the second present frame reconstructed module according to deformation tendency parameter prediction reconstruct present frame in the shape of lumpy pattern, colourity and
Brightness.
The agglomerate deformation compensation calculation actual current frame image of module collection is also carried out with lumpy pattern in the present frame of prediction
Comparison, calculates the agglomerate deformation about lumpy pattern and compensates residual value.
Primitive frame image information is sent to buffer zone module by primitive frame memory module, and described agglomerate cache module is by agglomerate
Pattern-information is immediately sent to coding module, agglomerate motion compensation calculations module and agglomerate deformation compensation calculation module and respectively will
Agglomerate motion compensation difference and agglomerate deformation compensate residual value and are immediately sent to coding module.Lumpy pattern is believed by coding module
Breath, agglomerate motion compensation difference and agglomerate deformation compensate output after residual value encodes and arrive buffer zone module.
Streaming media service unit is for being connected to live decoding terminal by cable network or wireless network, when terminal has directly
When broadcasting demand, streaming media server is by primitive frame image information and encoded lumpy pattern information, agglomerate motion compensation difference
Compensate residual value with agglomerate deformation and be sent to live decoding terminal from buffer zone module through network.
For matching with aforementioned video compressed encoding unit, as shown in Figure 4, live decoding terminal include buffer location and
Decoding unit, decoding unit includes that the motion of decoder module, the second primitive frame memory module, the second agglomerate cache module, agglomerate is mended
Repay feedback module, agglomerate deformation Compensation Feedback module, the second agglomerate interframe movement prediction module, agglomerate interframe movement trend caching
Module, the second agglomerate interframe deformation prediction module, agglomerate interframe deformation tendency cache module and the 3rd present frame reconstructed module.
Second primitive frame memory module reads primitive frame image from buffer location, and during in this, as video playback
First two field picture, decoder module reads lumpy pattern information, agglomerate motion compensation difference and agglomerate deformation from buffer location
Compensate residual value and be separately sent to agglomerate cache module, agglomerate motion compensation feedback module and agglomerate deformation compensation after the decoding instead
Feedback module.
Second agglomerate cache module, agglomerate motion compensation feedback module and agglomerate deformation Compensation Feedback module will receive respectively
To lumpy pattern information, agglomerate motion compensation difference and agglomerate deformation compensates residual value and is loaded into present frame reconstructed module for weight
Structure current frame image.
Second agglomerate interframe movement prediction module and the agglomerate motion prediction vectors of the second agglomerate interframe deformation prediction module
Load the most respectively to the 3rd present frame reconstructed module for reconstructing current frame image with agglomerate deformation tendency parameter result of calculation.The
Two agglomerate interframe movement prediction module and the second agglomerate interframe deformation prediction module are also by agglomerate motion prediction vectors and agglomerate shape
Change trend parameter is separately input to agglomerate interframe movement trend cache module and agglomerate interframe deformation tendency cache module, in case
Occur can the trend of frame continue to reconstruct image before when packet loss, frame losing.
Second agglomerate interframe movement prediction module and the second agglomerate interframe deformation prediction module the most constantly gather and reconstruct
The two field picture come, cannot calculate when motion or deformation tendency defeated after initial light is with collection primitive frame image and the second two field picture
Go out for sky.
It is former that the 3rd present frame reconstructed module in decoding unit first reads in the second primitive frame memory module when reconstruct
Beginning two field picture, then read the lumpy pattern information in the second agglomerate cache module, by combining agglomerate motion prediction vectors and group
Block deformation tendency and agglomerate motion compensation difference and agglomerate deformation compensation residual value carry out the picture of present frame and reconstruct and export.
Embodiment two
The present embodiment proposes a kind of medical video image live broadcasting method carried out on the basis of embodiment one, comprises the following steps:
Step one, gathers the instant raw video signal of multichannel from the video output terminals of various armarium.
Can be as preferably: be acquired by video acquisition unit during collection.Video acquisition unit includes gathering
Module and output module.Acquisition module is the hardware capture card of buying in the present embodiment, and hardware capture card is provided with multichannel
Input interface, hardware capture card is connected to the video of various armarium by coaxial cable, optical fiber cable or other wireline cable
On outfan, for carrying out the video-on-demand signal collection of multichannel.Output module is to add the process core being located on hardware capture card
Sheet and the output port being connected with this process chip, for by by acquisition module instantaneous acquiring to every road raw video signal warp
Sequential is transferred to video processing unit after arranging, transmission Shi Mei road raw video signal is continuous print frame.
Step 2, by instant for multichannel raw video signal after adjusting through video resolution, video frame rate and video code rate
The transformation of ownership becomes HD-SDI form.
Can be as preferably: video resolution, video frame rate and video code rate being adjusted and during the transformation of ownership is
Carried out by video processing unit.Video processing unit include sequentially forming video resolution adjusting module that signal connects,
Video frame rate adjusting module, code check adjusting module and HD-SDI transcoding module.
Can be as it is further preferred that video resolution adjusting module be by every two field picture of every road raw video signal
Resolution is all adjusted to 1280 pixels and takes advantage of 720 pixels.When the resolution of the two field picture of primary signal is less than this resolution, carry out
Interpolation calculation so that it is expand to 1280 pixels and take advantage of 720 pixels, when the resolution of the two field picture of primary signal is more than this resolution
Time, carry out resolution compression so that it is be reduced to 1280 pixels and take advantage of 720 pixels.Video frame rate adjusting module is for through differentiating
The frame per second of the raw video signal after rate adjustment is adjusted so that it is having the frame per second of 50HZ-60HZ, code check adjusting module is to whole
The code check parameter of individual raw video signal is adjusted the preset value of 1Mps-2Mps.
Step 3, is compressed coding to the instant raw video signal of multichannel of described HD-SDI form so that it is become many
Road is suitable to the streaming video of Internet communication.
Can be as preferably: compressed encoding is carried out by video compression coding unit, video compression coding list
Unit include primitive frame memory module, reference frame handling module, reference frame cache module, agglomerate take off module, agglomerate cache module,
Agglomerate interframe movement trend cache module, present frame reconstructed module, agglomerate motion compensation calculations module, agglomerate interframe deformation prediction
Module, agglomerate deformation compensation calculation module, coding module and buffer zone module.
Wherein, primitive frame memory module is pre-stored with the primitive frame image under pure background scene, reference frame handling module
For capturing the second two field picture, (" the second frame ", only for convenience of in conjunction with the accompanying drawings, in a particular application, " the second frame " is actual
For X+1 frame, lower with) as reference frame, preset reference frame is contained within the substantial image beyond background (in electrocardiogram indicator
Actual scene in parameter curve or operating room), reference frame handling module captures after can being preset to be spaced N frame, it is also possible to
Be preset to capture continuously, view network transmission environment and to the demand of video quality depending on, when network environment is preferably or to video
Edge crawl can be arranged to when quality requirement is higher or N value becomes little.Reference frame after crawl deposits in reference frame cache module
In standby.
Agglomerate takes off module by by former with primitive frame memory module of the reference frame image in reference frame cache module
Beginning two field picture carries out overlapping contrast, and then takes off out the agglomerate image with actual content.
When taking off as it is shown on figure 3, first reference frame image and primitive frame image are divided according to colourity and the brightness of image
Solution becomes the some macro blocks of various level and some microliths, and then overlapping contrast removes repeatable block, retains difference block, the difference retained
The set of different piece is defined as agglomerate, and lumpy pattern information includes aforementioned differences block coordinate in reference frame, colourity, brightness etc.
Relevant parameter.Supply lumpy pattern information temporary storage in agglomerate cache module to call.
It is special that agglomerate interframe movement prediction module collection the 3rd two field picture wherein searching meet aforementioned lumpy pattern information
The lumpy pattern levied, and then calculate agglomerate in the 3rd frame relative to motion vector during at the second frame, and by this motion vector
It is sent in present frame reconstructed module as agglomerate motion prediction vectors, is used for constructing virtual current frame image (the 4th frame),
Containing virtual agglomerate in virtual current frame image, agglomerate motion compensation calculations module gathers actual current frame image, and by reality
Current frame image and virtual present frame are compared inspection, calculate in virtual agglomerate and actual current frame image between agglomerate
Alternate position spike also combines agglomerate motion prediction vectors and calculates agglomerate motion compensation difference.
It is special that agglomerate interframe deformation prediction module collection the 3rd two field picture wherein searching meet aforementioned lumpy pattern information
The lumpy pattern levied, calculates in the 3rd frame lumpy pattern relative to the agglomerate deformation of the lumpy pattern information in agglomerate cache module
Trend parameter, investigates in the deformation parameter of agglomerate pattern edge profile and lumpy pattern each micro-when calculating agglomerate deformation tendency parameter
The chroma luminance parameter of block.Agglomerate interframe deformation prediction module agglomerate deformation tendency parameter is exported present frame reconstructed module by
Present frame reconstructed module is according to the shape of lumpy pattern, colourity and brightness in deformation tendency parameter prediction reconstruct present frame.
The agglomerate deformation compensation calculation actual current frame image of module collection is also carried out with lumpy pattern in the present frame of prediction
Comparison, calculates the agglomerate deformation about lumpy pattern and compensates residual value.
Primitive frame image information is sent to buffer zone module by primitive frame memory module, and described agglomerate cache module is by agglomerate
Pattern-information is immediately sent to coding module, agglomerate motion compensation calculations module and agglomerate deformation compensation calculation module and respectively will
Agglomerate motion compensation difference and agglomerate deformation compensate residual value and are immediately sent to coding module.Lumpy pattern is believed by coding module
Breath, agglomerate motion compensation difference and agglomerate deformation compensate output after residual value encodes and, to buffer zone module, are formed to be sent
Streaming media data.
Step 4, is transferred to live decoding eventually by streaming media server and communication network by aforementioned streaming media data
End.
Aforementioned communications network can be WIFI or 4G cordless communication network.When terminal has live demand, streaming media server
Primitive frame image information and encoded lumpy pattern information, agglomerate motion compensation difference and agglomerate deformation are compensated residual value postpone
Rush district's module and be sent to live decoding terminal through network.
The present invention is not limited to above-described embodiment, and the technical scheme of each embodiment above-mentioned of the present invention can be handed over each other
Fork combination forms new technical scheme, and the technical scheme that the most all employing equivalents are formed all falls within the guarantor of application claims
In the range of protecting.
Claims (9)
1. a medical video signals collecting trans-coding system, it is characterised in that: include that the video passing sequentially through I/O bus connected is adopted
Collection unit, video processing unit, video compression coding unit and streaming media service unit；
Described video acquisition unit includes that acquisition module and output module, described acquisition module are used for being connected to existing various medical treatment
The video output terminals of equipment also carries out multichannel video-on-demand signal collection, and described output module is for will by described acquisition module i.e.
Time every road raw video signal of collecting after sequential arranges, in the way of real-time streaming, be transferred to described video processing unit；
Described video processing unit is used for being changed into HD-SDI form after described raw video signal is carried out parameter processing,
Including and sequentially form signal connect video resolution adjusting module, video frame rate adjusting module, code check adjusting module and HD-
SDI transcoding module；
Described video compression coding unit forms video streaming for aforementioned HD-SDI format video signal is compressed coding
Media；
Described streaming media service unit is for being connected to live decoding terminal by cable network or wireless network.
Medical video signals collecting trans-coding system the most according to claim 1, it is characterised in that: the coding of described streaming video
Standard is H.265 standard.
Medical video signals collecting trans-coding system the most according to claim 2, it is characterised in that: described video resolution adjusts
The output video resolution of module is that 1280 pixels take advantage of 720 pixels, the adjustment frame per second of described video frame rate adjusting module to be 50 Hz
-60Hz, the adjustment bit rate output of described code check adjusting module is 1 Mbps-2Mbps.
Medical video signals collecting trans-coding system the most according to claim 1, it is characterised in that: described video compression coding list
Unit include primitive frame memory module, reference frame handling module, reference frame cache module, agglomerate take off module, agglomerate cache module,
Agglomerate interframe movement trend cache module, present frame reconstructed module, the second present frame reconstructed module, agglomerate motion compensation calculations mould
Block, agglomerate interframe deformation prediction module, agglomerate deformation compensation calculation module, coding module and buffer zone module.
Medical video signals collecting trans-coding system the most according to claim 4, it is characterised in that: described primitive frame memory module
In the primitive frame image that is pre-stored with under pure background scene；
Reference frame handling module captures a two field picture after the N frame of each interval as reference frame, and the span of N is 0-60；
Agglomerate takes off module for taking off out the agglomerate image with actual content in reference frame image and by this lumpy pattern
Information be input in agglomerate cache module temporary；
Agglomerate interframe movement prediction module meets in reference frame for gathering the image after being positioned at reference frame searching wherein
The lumpy pattern of lumpy pattern feature, so calculate this lumpy pattern relatively in reference frame time motion vector, and should
Motion vector is sent in present frame reconstructed module as agglomerate motion prediction vectors；
Present frame reconstructed module is used for constructing virtual current frame image, containing virtual lumpy pattern in virtual current frame image；
Agglomerate motion compensation calculations module is used for gathering actual current frame image, and by actual current frame image and virtual present frame
Compare inspection, calculate in virtual lumpy pattern and actual current frame image the alternate position spike between lumpy pattern anchoring group
Block motion prediction vectors calculates agglomerate motion compensation difference；
Agglomerate interframe deformation prediction module meets in reference frame for gathering the image after being positioned at reference frame searching wherein
The lumpy pattern of lumpy pattern feature, so calculate this lumpy pattern relatively in reference frame time agglomerate deformation tendency ginseng
Number, and described agglomerate deformation tendency parameter is exported to the second present frame reconstructed module, described second present frame reconstructed module is used
In constructing virtual current frame image, containing virtual lumpy pattern in virtual current frame image, agglomerate deformation compensation calculation module
Gather actual current frame image and compare with lumpy pattern in aforementioned virtual current frame image, calculating about lumpy pattern
Agglomerate deformation compensate residual value；
Buffer zone module is mended for depositing primitive frame image and the described lumpy pattern information of encoded module coding, agglomerate motion
Repay difference and agglomerate deformation compensates residual value.
Medical video signals collecting trans-coding system the most according to claim 5, it is characterised in that: live decoding terminal has slow
Rush district's unit and decoding unit, decoding unit include decoder module, the second primitive frame memory module, the second agglomerate cache module,
Agglomerate motion compensation feedback module, agglomerate deformation Compensation Feedback module, the second agglomerate interframe movement prediction module, agglomerate interframe are transported
Dynamic trend cache module, the second agglomerate interframe deformation prediction module, agglomerate interframe deformation tendency cache module and the 3rd present frame
Reconstructed module.
Medical video signals collecting trans-coding system the most according to claim 6, it is characterised in that: the second primitive frame memory module
Primitive frame image is read from buffer location, and in this, as first two field picture during video playback；
Decoder module compensates for reading lumpy pattern information, agglomerate motion compensation difference and agglomerate deformation from buffer location
Residual value is also separately sent to the second agglomerate cache module, agglomerate motion compensation feedback module and agglomerate deformation compensation instead after the decoding
Feedback module；
Second agglomerate cache module, agglomerate motion compensation feedback module and agglomerate deformation Compensation Feedback module will receive respectively
Lumpy pattern information, agglomerate motion compensation difference and agglomerate deformation compensate residual value and are loaded into the 3rd present frame reconstructed module；
Second agglomerate interframe movement prediction module and the agglomerate motion prediction vectors of the second agglomerate interframe deformation prediction module and group
Block deformation tendency parameter result of calculation loads the most respectively to the 3rd present frame reconstructed module, the second agglomerate interframe movement prediction module
Also agglomerate motion prediction vectors and agglomerate deformation tendency parameter are separately input to group with the second agglomerate interframe deformation prediction module
Block interframe movement trend cache module and agglomerate interframe deformation tendency cache module；
3rd present frame reconstructed module is suitable in reconstruct when the current frame, first read the primitive frame figure in the second primitive frame memory module
Picture, then read the lumpy pattern information in the second agglomerate cache module, by combining agglomerate motion prediction vectors and agglomerate deformation
Trend and agglomerate motion compensation difference and agglomerate deformation compensation residual value carry out the picture of present frame and reconstruct and export.
Medical video signals collecting trans-coding system the most according to claim 7, it is characterised in that: described agglomerate is taken off module and is existed
When reference frame image takes off agglomerate, first reference frame image and primitive frame image are decomposed all in accordance with colourity and the brightness of image
Become the some macro blocks of various level and some microliths, then reference frame image and primitive frame image overlapping contrast are removed repetition
Block, retains difference block, and the set of the difference block retained is defined as agglomerate, and lumpy pattern information includes that aforementioned differences block is in ginseng
Examine the coordinate in frame, colourity, luminance parameter.
Medical video signals collecting trans-coding system the most according to claim 8, it is characterised in that: described agglomerate interframe deformation is pre-
Survey module and the second agglomerate interframe deformation prediction module and investigate agglomerate pattern edge profile when calculating agglomerate deformation tendency parameter
Deformation parameter and lumpy pattern in the chroma luminance parameter of each microlith.
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