CN106470340A - A kind of secondary video data-encoding scheme and system - Google Patents
A kind of secondary video data-encoding scheme and system Download PDFInfo
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- CN106470340A CN106470340A CN201510501242.3A CN201510501242A CN106470340A CN 106470340 A CN106470340 A CN 106470340A CN 201510501242 A CN201510501242 A CN 201510501242A CN 106470340 A CN106470340 A CN 106470340A
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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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Abstract
The present invention provides a kind of secondary video data-encoding scheme, and described secondary video data-encoding scheme includes following step：The first predetermined way is adopted to be decoded to obtain the first view data the video data collecting；The view data of the yuv format of acquisition is carried out coded treatment by the second predetermined way and obtains the second view data；Described second view data is carried out network transmission.It is constant that secondary video data-encoding scheme of the present invention achieves holding video resolution, and transmission code rate reduces it is ensured that video-see effect, and transmission cost is relatively low, and the high-quality meeting necessary for monitoring requires.
Description
Technical field
The invention belongs to technical field of image processing, it is related to a kind of coded method and system, more particularly to a kind of secondary video number
According to coded method and system.
Background technology
Security protection video monitoring trade development at present is swift and violent, the requirement more and more higher to video quality for the people.Such as image capture device
The image collecting by D1 resolution towards 720P, or even the resolution development of 1080P.The direct benefit so brought is people
Can acquire clearly front-end image.But thing followed problem is exactly the problem of transmission.
In video-transmission problems, the video of more high definition, code check is bigger, that is, the data volume of transmitted per unit time is bigger,
So, under the conditions of comparable bandwidths, the video monitoring way that can transmit is fewer.Under the bandwidth situation even having, a road
The video quality of 1080P nor good guarantee.It is, in general, that in order to ensure picture quality, having 2 kinds of settling modes,
One is to increase bandwidth, but is to increase bandwidth and does not have thorough solve problem, and is the increase in the cost of user；Two is to reduce monitoring road
Number, but so also do not tackle the problem at its root, and deviated from the original intention of monitoring, the basic demand of monitoring is also intended to protect
Card can check multiway images simultaneously.
Therefore, how a kind of secondary video data-encoding scheme and system are provided, are set with solving security protection video monitoring in prior art
Bandwidth shared by standby middle video is more, and transmission cost is higher it is impossible to the high-quality that meets necessary for monitoring such as requires at the many disadvantages, real
Become practitioner in the art's technical problem urgently to be resolved hurrily.
Content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of secondary video data-encoding scheme and be
System, more for solving bandwidth shared by video in security protection video monitoring device in prior art, transmission cost higher it is impossible to full
The problem that the high-quality of sufficient necessary for monitoring requires.
For achieving the above object and other related purposes, one aspect of the present invention provides a kind of secondary video data-encoding scheme, described
Secondary video data-encoding scheme includes following step：The video data collecting is decoded using the first predetermined way
To obtain the first view data；The view data of the yuv format of acquisition is carried out coded treatment by the second predetermined way obtain
Take the second view data；Described second view data is carried out network transmission.
Alternatively, described first image data is the view data of yuv format.
Alternatively, described first predetermined way includes：Using video stream format, the video data collecting is decoded；Or adopt
With the data decoding process of privately owned picture format, the video data collecting is decoded.
Alternatively, described second predetermined way includes for the view data of the yuv format of acquisition carrying out CABAC coding, many ginsengs
Examine frame, 8x8 infra-frame prediction, 8x8DCT conversion.
Alternatively, described second predetermined way is the view data using H.264High Profile technology to the yuv format obtaining
Carry out coded treatment.
Another aspect of the present invention also provides a kind of secondary video data encoding system, and described secondary video data encoding system includes：
Acquisition module, for gathering video data；First processing module, is connected with described acquisition module, for the video collecting
Data adopts the first predetermined way to be decoded to obtain the first view data；Second processing module, with described first processing module
Connect, obtain the second image for the view data of the yuv format of acquisition is carried out coded treatment by the second predetermined way
Data；Transport module, is connected with described Second processing module, for described second view data is carried out network transmission.
Alternatively, the form of the first view data obtaining in described first processing module is the view data of yuv format, and
Described first predetermined way is pre-stored within described first processing module.
Alternatively, described first processing module provides two interfaces, wherein, adopted by video data is input to first interface
With video stream format, the video data collecting is decoded；Adopt privately owned image by Data Data is input to second interface
The data decoding process of form is decoded to the video data collecting.
Alternatively, described Second processing module prestores described second predetermined way, described second predetermined way includes obtaining
Yuv format view data carry out CABAC coding, multi-reference frame, 8x8 infra-frame prediction, 8x8DCT conversion.
Another aspect of the invention also provides a kind of terminal unit, and described terminal unit includes：Described secondary video data encoding system
System.
As described above, the secondary video data-encoding scheme of the present invention and system, have the advantages that：
Secondary video data-encoding scheme of the present invention and system achieve and keep video resolution constant, and transmission code rate fall
Low it is ensured that video-see effect, transmission cost is relatively low, and the high-quality meeting necessary for monitoring requires.
Brief description
Fig. 1 is shown as the secondary video data-encoding scheme schematic flow sheet of the present invention.
Fig. 2 is shown as the theory structure schematic diagram of the secondary video data encoding system of the present invention.
Fig. 3 is shown as the theory structure schematic diagram of the terminal unit of the present invention.
Component label instructions
1 secondary video data encoding system
11 acquisition modules
12 first processing modules
13 Second processing modules
14 transport modules
2 terminal units
21 secondary video data encoding systems
S1～S4 step
Specific embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art can be disclosed by this specification
Content understand other advantages and effect of the present invention easily.The present invention can also be added by addition different specific embodiments
To implement or to apply, the every details in this specification can also be based on different viewpoints and application, in the essence without departing from the present invention
Carry out various modifications and changes under god.It should be noted that, the feature in the case of not conflicting, in following examples and embodiment
Can be mutually combined.
It should be noted that the diagram provided in following examples only illustrates the basic conception of the present invention in a schematic way, then scheme
Only show the assembly relevant with the present invention in formula rather than draw, in fact according to component count during actual enforcement, shape and size
When border is implemented, the kenel of each assembly, quantity and ratio can be a kind of random change, and its assembly layout kenel be likely to more multiple
Miscellaneous.
Embodiment one
The present embodiment provides a kind of secondary video data-encoding scheme, refers to Fig. 1, is shown as secondary video data-encoding scheme
Schematic flow sheet.As shown in figure 1, described secondary video data-encoding scheme includes following step：
S1, gathers video data.In the present embodiment, this video data is the compression obtaining after video compression algorithm compression
Data, described compression algorithm as H.263, H.264, H.265, AVI, MPEG4 etc..And the compression algorithm pair using standard
The video data of compression carries out video decoding, is decoded as the video data of yuv format, the video data of yuv format is video
The original video source data capturing during collection, is mainly made up of tri- components of YUV.
S2, adopts the first predetermined way to be decoded to obtain the first view data the video data collecting.Described first is pre-
Determine mode to include：Using video stream format, the video data collecting is decoded.In the present embodiment to standard image format
Decoding data, such as H.264, the video stream format such as MPEG, it is possible to use the decoding storehouse such as FFMPEG that maturation is increased income
Deng, by by standard video stream be input to decoding storehouse provide interface, decoding storehouse can be decoded process, export YUV image
Data.Or using the data decoding process of privately owned picture format, the video data collecting is decoded.This predetermined way is just
The decoding storehouse providing by third party producer is needed to obtain raw image data.The result of two kinds of decoding processes is the same, is all
Obtain original YUV image data, differ only in and carry out processing video data using different decoding storehouses.
S3, the view data of the yuv format of acquisition is carried out coded treatment by the second predetermined way and obtains the second view data.
In the present embodiment, the view data of described second predetermined way yuv format to acquisition using H.264High Profile technology
Carry out coded treatment.H.264High Profile technology include by the view data of the yuv format of acquisition carry out CABAC coding,
Multi-reference frame, 8x8 infra-frame prediction, 8x8DCT conversion.H.264High Profile is to encode in current H.264 various profile
The most efficient Profile.Increased on the basis of H.264Main Profile 8 × 8 infra-frame predictions, self-defined quantization matrix,
Lossless video encoding, support input picture are YUV400 form.Compared with other standards, under the conditions of identical distortion rate H.264
The code efficiency of High Profile improves 50% about.Wherein mainly having to lifting compression rates：CABAC coding,
Multi-reference frame, 8 × 8 infra-frame predictions, 8 × 8DCT conversion.
Two-layer conceptually can be divided into：Video coding layer (VCL:Video Coding Layer) and network abstraction layer (NAL:
Network Abstraction Layer).VCL and NAL hierarchical coding design target be exactly make H.264 standard to various networks
Agreement has wider adaptability, and realizes optimal compression performance under the conditions of certain network characteristic.VCL and NAL is in work(
Can on be the relation shared out the work and helped one another, VCL is responsible for block-based motion compensation hybrid coding.And NAL is responsible for the suitable of network specially
Join, provide File header information including for coded video information, by rights video data is packed and transmit.I.e. with
NAL bag only need to add after taking NAL bag for the mode elementary cell of coming as VCL encoding and decoding of unit, such Internet
The header of this host-host protocol just can send out.NAL can be treated as is a module specializing in data encapsulation, for inciting somebody to action
The compressed H.264 code stream of VCL is packaged into appropriately sized packet, and the type in data packet head record packet, every kind of
Type corresponds to different encoding and decoding instruments in VCL respectively.
Introduce NAL layer in the h .264 standard, its code flow structure is higher to the adaptability of network, increased error resilience.
In this hierarchy, the task of high coding efficiency and network friendliness to be completed by VCL and NAL respectively.Using this
Characteristic, can also realize the encapsulation to data and carry out more preferable priority acccess control to data.
Another critical function of NAL layer is when network condition occurs to deteriorate, and leads to NAL packet loss or accepts order entanglement
When, recipient can carry out corresponding correction process according to default scheme.H.264 12 kinds of NAL are defined altogether in specification
The type of unit, to define different NAL contents, and so when an error occurs, dispatch layer just can be according to different NAL
Type does different process operations.This function is in the relatively low network of reliability, particularly useful.H.264 standard is in high definition
There is minimum volume.Under equal picture quality, only have the 1/8 of MPEG2 using the data volume after H.264 technique compresses,
The 1/3 of MPEG4, and the present embodiment can save 50% bandwidth in the case of equivalent video quality using proprietary coded method,
And ensure that picture quality (resolution), reduce video code rate.
S4, described second view data is carried out network transmission.
For example, in Education Commission's network in X area of X city, Education Commission belongs to the examination hall of middle and primary schools and classroom to area and carries out the unification of video monitoring
Management.Because school's quantity is many, front end photographic head quantity is many, high resolution (1080P).Education Commission requires concurrent video transmission number
Measure about 10 tunnels, below bandwidth every road 1Mbps.
Front-end camera under 1080P resolution, every road bandwidth in 2Mbps, if according to regarding that front-end camera is passed back
Frequency stream former state forwards, and does not reach the requirement of Education Commission, simultaneously because the network bandwidth is limited, bandwidth can be caused crowded, video interim card is existing
As, secondary video data-encoding scheme of the present invention is added after gateway, simultaneously by gateway deployment in close headend equipment side,
It has been achieved in that holding video resolution is constant, and transmission code rate has reduced.Ensure that video-see effect, also having reached project will
Ask.
Embodiment two
The present embodiment provides a kind of secondary video data encoding system 1, refers to Fig. 2, is shown as secondary video data encoding system
Theory structure schematic diagram.As shown in Fig. 2 described secondary video data encoding system 1 includes：At acquisition module 11, first
Reason module 12, Second processing module 13 and transport module 14.
Described acquisition module 11 is used for gathering video data.In the present embodiment, this video data is through video compression algorithm pressure
The compressed data obtaining after contracting, described compression algorithm as H.263, H.264, H.265, AVI, MPEG4 etc..And using mark
Accurate compression algorithm carries out video decoding to the video data of compression, is decoded as the video data of yuv format, yuv format
The original video source data capturing when video data is for video acquisition, is mainly made up of tri- components of YUV.In the present embodiment
In, described acquisition module can be the preposition video camera on a safety monitoring equipment.
The first processing module 12 being connected with described acquisition module 11 is used for adopting the first predetermined way to the video data collecting
It is decoded to obtain the first view data.Described first predetermined way being pre-stored in described first processing module 12 includes：Adopt
With video stream format, the video data collecting is decoded.Two interfaces are provided on described first processing module, wherein, leads to
Cross and video data is input to first interface using video stream format, the video data collecting is decoded；By by data number
The video data collecting is decoded using the data decoding process of privately owned picture format according to being input to second interface.Namely
Say, in the present embodiment the decoding data to standard image format, such as H.264, the video stream format such as MPEG, permissible
Decoding storehouse such as FFMPEG being increased income using maturation etc., by standard video stream is input to the interface that decoding storehouse provides, decodes storehouse
Can be decoded processing, export YUV image data.Or using privately owned picture format data decoding process to regarding of collecting
Frequency decoding data.The decoding storehouse that this predetermined way is accomplished by providing by third party producer to obtain raw image data.Two
The result planting decoding process is the same, is all to obtain original YUV image data, differs only in using different decodings
Storehouse carries out processing video data.
The Second processing module 13 being connected with described first processing module 12 is used for leading to the view data of the yuv format of acquisition
Cross the second predetermined way and carry out coded treatment to obtain the second view data.In the present embodiment, described second predetermined way adopts
H.264High Profile technology carries out coded treatment to the view data of the yuv format obtaining.H.264High Profile technology
Carry out CABAC coding, multi-reference frame, 8x8 infra-frame prediction, 8x8DCT including by the view data of the yuv format of acquisition
Conversion.H.264High Profile is to encode the most efficient Profile in current H.264 various profile.H.264Main
Increased 8 × 8 infra-frame predictions, self-defined quantization matrix, lossless video encoding on the basis of Profile, support that input picture is
YUV400 form.Compared with other standards, under the conditions of identical distortion rate, H.264High the code efficiency of Profile improves
50% about.Wherein mainly having to lifting compression rates：CABAC coding, multi-reference frame, 8 × 8 infra-frame predictions, 8 ×
8DCT converts.
Two-layer conceptually can be divided into：Video coding layer (VCL:Video Coding Layer) and network abstraction layer (NAL:
Network Abstraction Layer).VCL and NAL hierarchical coding design target be exactly make H.264 standard to various networks
Agreement has wider adaptability, and realizes optimal compression performance under the conditions of certain network characteristic.VCL and NAL is in work(
Can on be the relation shared out the work and helped one another, VCL is responsible for block-based motion compensation hybrid coding.And NAL is responsible for the suitable of network specially
Join, provide File header information including for coded video information, by rights video data is packed and transmit.I.e. with
NAL bag only need to add after taking NAL bag for the mode elementary cell of coming as VCL encoding and decoding of unit, such Internet
The header of this host-host protocol just can send out.NAL can be treated as is a module specializing in data encapsulation, for inciting somebody to action
The compressed H.264 code stream of VCL is packaged into appropriately sized packet, and the type in data packet head record packet, every kind of
Type corresponds to different encoding and decoding instruments in VCL respectively.
Introduce NAL layer in the h .264 standard, its code flow structure is higher to the adaptability of network, increased error resilience.
In this hierarchy, the task of high coding efficiency and network friendliness to be completed by VCL and NAL respectively.Using this
Characteristic, can also realize the encapsulation to data and carry out more preferable priority acccess control to data.
Another critical function of NAL layer is when network condition occurs to deteriorate, and leads to NAL packet loss or accepts order entanglement
When, recipient can carry out corresponding correction process according to default scheme.H.264 12 kinds of NAL are defined altogether in specification
The type of unit, to define different NAL contents, and so when an error occurs, dispatch layer just can be according to different NAL
Type does different process operations.This function is in the relatively low network of reliability, particularly useful.H.264 standard is in high definition
There is minimum volume.Under equal picture quality, only have the 1/8 of MPEG2 using the data volume after H.264 technique compresses,
The 1/3 of MPEG4, and the present embodiment can save 50% bandwidth in the case of equivalent video quality using proprietary coded method,
And ensure that picture quality (resolution), reduce video code rate.
The transport module 14 being connected with described Second processing module 13 is used for for described second view data carrying out network transmission.?
In the present embodiment, described transport module 14 can be wireless transport module or wire transmission module.
The present embodiment also provides a kind of terminal unit 2, refers to Fig. 3, is shown as the theory structure schematic diagram of terminal unit.Described
Terminal unit 2 includes secondary video data encoding system 21 described above.
In sum, secondary video data-encoding scheme of the present invention and system achieve and keep video resolution constant, and
Transmission code rate reduces it is ensured that video-see effect, and transmission cost is relatively low, and the high-quality meeting necessary for monitoring requires.So,
The present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only principle of the illustrative present invention and its effect, not for the restriction present invention.Any it is familiar with this skill
The personage of art all can carry out modifications and changes without prejudice under the spirit and the scope of the present invention to above-described embodiment.Therefore, such as
Those of ordinary skill in the art completed under without departing from disclosed spirit and technological thought all etc.
Effect modifications and changes, must be covered by the claim of the present invention.
Claims (10)
1. a kind of secondary video data-encoding scheme is it is characterised in that described secondary video data-encoding scheme includes following step：
The first predetermined way is adopted to be decoded to obtain the first view data the video data collecting；
The view data of the yuv format of acquisition is carried out coded treatment by the second predetermined way and obtains the second picture number
According to；
Described second view data is carried out network transmission.
2. secondary video data-encoding scheme according to claim 1 it is characterised in that：Described first image data is YUV
The view data of form.
3. secondary video data-encoding scheme according to claim 1 it is characterised in that：Described first predetermined way includes：
Using video stream format, the video data collecting is decoded；Or
Data decoding process using privately owned picture format is decoded to the video data collecting.
4. secondary video data-encoding scheme according to claim 1 it is characterised in that：Described second predetermined way includes obtaining
The view data of the yuv format taking carries out CABAC coding, multi-reference frame, 8x8 infra-frame prediction, 8x8DCT conversion.
5. secondary video data-encoding scheme according to claim 4 it is characterised in that：Described second predetermined way is employing
H.264High Profile technology carries out coded treatment to the view data of the yuv format obtaining.
6. a kind of secondary video data encoding system is it is characterised in that described secondary video data encoding system includes：
Acquisition module, for gathering video data；
First processing module, is connected with described acquisition module, for being entered using the first predetermined way to the video data collecting
Row decoding is to obtain the first view data；
Second processing module, is connected with described first processing module, for passing through the view data of the yuv format of acquisition
Second predetermined way carries out coded treatment to obtain the second view data；
Transport module, is connected with described Second processing module, for described second view data is carried out network transmission.
7. secondary video data encoding system according to claim 6 it is characterised in that：Obtain in described first processing module
The form of the first view data is the view data of yuv format, and described first predetermined way is pre-stored within described first
In processing module.
8. secondary video data encoding system according to claim 7 it is characterised in that：Two are provided in described first processing module
Individual interface, wherein, is carried out to the video data collecting using video stream format by video data is input to first interface
Decoding；By Data Data is input to the data decoding process using privately owned picture format for the second interface to the video collecting
Decoding data.
9. secondary video data encoding system according to claim 7 it is characterised in that：Prestore in described Second processing module
Described second predetermined way, described second predetermined way includes for the view data of the yuv format of acquisition carrying out CABAC
Coding, multi-reference frame, 8x8 infra-frame prediction, 8x8DCT conversion.
10. a kind of terminal unit is it is characterised in that described terminal unit includes：
Described secondary video data encoding system as arbitrary in claim 6-9.
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