CN105025347B - A kind of method of sending and receiving of GOP images group - Google Patents
A kind of method of sending and receiving of GOP images group Download PDFInfo
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- CN105025347B CN105025347B CN201510430914.6A CN201510430914A CN105025347B CN 105025347 B CN105025347 B CN 105025347B CN 201510430914 A CN201510430914 A CN 201510430914A CN 105025347 B CN105025347 B CN 105025347B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000003709 image segmentation Methods 0.000 claims abstract description 3
- 238000000638 solvent extraction Methods 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 2
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23602—Multiplexing isochronously with the video sync, e.g. according to bit-parallel or bit-serial interface formats, as SDI
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234309—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
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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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4342—Demultiplexing isochronously with video sync, e.g. according to bit-parallel or bit-serial interface formats, as SDI
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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
- H04N21/440218—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 transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
A kind of sending method of GOP images group provided by the present invention, including step：Each image segmentation is at least two subgraphs according to a partitioning scheme, forms corresponding at least two subimage sequence by the A, image sequence for being included for the GOP to be sent；Wherein, divided image is known as dad image；B, it is directed to each subgraph, encoded, be packaged and sent respectively, described includes loading position information and synchronizing information；Wherein, each subgraph synchronizing information of corresponding same dad image is identical, and the location information is used to describe position of the subgraph in corresponding dad image.It is corresponding, a kind of image method of reseptance is also provided, fragmental image processing is carried out coded treatment to multiple small images in real time and sent, sent compared to whole figure, improve image transmitting speed by the present invention.
Description
Technical field
The present invention relates to technical field of image processing, more particularly to a kind of method of sending and receiving of GOP images group.
Background technology
Image in conventional images transmission process mostly uses picture group structure (GOP, Group of Pictures), one
GOP is exactly one group of continuous picture.As unit of frame, the video image that will be sent is handled transmitting terminal frame by frame, position in load
And temporal information, coding compression is carried out respectively, then header is added to each image packet, the header includes position letter
Breath and temporal information, are then sent by network.
Image receiving terminal parses the header of the data packet received, data is given to decoding end, decoding end will
Each compressed data are decoded into picture, then restore original image according to header.
As shown in Figure 1, when carrying out image transmitting using the prior art, for original image, it is assumed that scramble time Tc, pass
The defeated time is Tt, decoding time Td, then total time T of the frame image before being encoded to decoding display0=Tc+Tt+Td.Due to
In gop structure frame, some frames are taken up too much space, such as I frames, and some picture frames take up space smaller, such as P frames, B frames,
In, I frames, that is, intra-coded frame, P is forward predicted frame, and B is two-way interpolation frame, the image to be taken up too much space in transmission process
Transmission time is longer, causes image transmitting efficiency relatively low.
Invention content
In view of this, it is a primary object of the present invention to, a kind of sending method of GOP images group is provided, including：
Each image segmentation is at least according to a partitioning scheme by the A, image sequence for being included for the GOP to be sent
Two subgraphs form corresponding at least two subimage sequence；Wherein, divided image is known as dad image；
B, be directed to each subgraph, encoded, be packaged and sent respectively, it is described include loading position information with
Synchronizing information；Wherein, each subgraph synchronizing information of corresponding same dad image is identical, and the location information is for describing subgraph
Position in corresponding dad image.
By upper, by fragmental image processing, coded treatment carried out to multiple small images in real time and is sent, is sent out compared to whole figure
It send, improves image transmitting speed.
Optionally, each subgraph inherits corresponding each dad image I, P or B frame format；I, P and B frame point
Intra-coded frame, forward predicted frame and two-way interpolation frame that Wei be in GOP；
Further include before being sent described in step B：At the time of adjusting I frames transmission in an at least subimage sequence.
Optionally, include at the time of I frames are sent in an adjustment at least subimage sequence：
Adjust the image sequence length of each subgraph；
Between the adjacent I frames of each subimage sequence, it is inserted into quantity different P frames and/or B frames.
By upper, avoid under synchronization, each small figure of part is taken up space maximum intra-coded frame.By upsetting frame
Sequence so that intra-coded frame, thus can be in transmission process in different moments, and amortization of data amount avoids network delay.
Optionally, the image sequence length of each subgraph is quantitative value prime number different each other.
By upper, it can be ensured that in each subgraph, I frames will not occur in synchronization.
Optionally, include at the time of I frames are sent in an adjustment at least subimage sequence：
Adjust the transmission sequence of each I frames, P frames and B frames in each subimage sequence.
Optionally, further include step after step A：Each subgraph is compared into row differences, according to comparison result antithetical phrase
Image carries out secondary splitting processing.
By upper, after original image is carried out a decile, it is assumed that picture material differs greatly, then in transmission process still
Efficiency of transmission can be influenced, after carrying out secondary decile processing so that the scramble time of all aliquot images is approximate, so as to improve
Transmission speed.
Optionally, it is described to each subgraph into row differences compare including：
Determine subgraph on the basis of the minimum image of content；
Other subgraphs are compared with benchmark image respectively, determine the content deltas with benchmark image.
Optionally, subgraph includes step on the basis of determining the minimum image of content：
Preset a gray difference threshold k；
Binary conversion treatment is carried out to each subgraph；
To each subgraph after binary conversion treatment, by the first row (or row) of the subgraph, more adjacent two picture one by one
The gray difference of vegetarian refreshments is recorded when gray difference is more than the gray difference threshold k；
The gray difference for counting adjacent two pixel of each subgraph is more than the group number of gray difference threshold k, and group number is most
Subgraph on the basis of small corresponding image.
By upper, the content for confirming the image is realized, when the group number of neighbor pixel grey value difference in image is more, indicate
The picture material is abundanter；Otherwise the group number for working as neighbor pixel grey value difference in image is fewer, indicates that the picture material is got over
Simply.Such as the backgrounds such as blue sky, neighbor pixel gray value is almost without difference.
Optionally, carrying out secondary splitting processing to other non-referenced subgraphs according to comparison result includes：According to other sons
The ratio of image and the gray difference of benchmark subgraph carries out secondary splitting processing to other non-reference images.
By upper, keep its scramble time approximate the image decile of different content according to picture material difference, so as to
Improve transmission speed.
Corresponding, the present invention also provides a kind of method of reseptances of the sending method based on above-mentioned GOP images group, including：
C, it for each subgraph of each subimage sequence, received, unpacked and is decoded respectively；
D, corresponding each subgraph is constituted into each dad image according to synchronizing information and location information, what formation was received
The image sequence that GOP is included.
By upper, receiving terminal can restore dad image.
Description of the drawings
Fig. 1 is the time diagram that the prior art transmits image；
Fig. 2 is flow chart of the present invention；
Fig. 3 is the transmission schematic diagram of image transmitting terminal；
Fig. 4 is the schematic diagram schemed when A~figure D does not adjust frame sequence
Fig. 5 is the schematic diagram schemed after A~figure D adjustment frame sequences；
Fig. 6 is the reception schematic diagram of technology image receiving terminal；
Fig. 7 is the time diagram that image is transmitted using the present invention program.
Specific implementation mode
To overcome defect of the existing technology, the present invention to provide a kind of method of sending and receiving of GOP images group, will scheme
The processing of piece piecemeal carries out coded treatment to multiple small images in real time and sends, sent compared to whole figure, improves image transmitting speed
Degree.
As shown in Fig. 2, in the embodiment of the present invention, the step performed by image transmitting terminal includes S10~S40, and image receives
The performed step in end includes S50~S80.
S10：The image that will be sent carries out N deciles.
As unit of frame, the video image that will be sent is handled transmitting terminal frame by frame, specifically, by existing large-size images
It is split, the subgraph of identical size is divided into, in order to efficiency of transmission.Specifically, N may include 2,4,6,8 etc..Such as
Shown in Fig. 3, in the present embodiment, illustrated for image is carried out 4 deciles.I.e. by original image according to pixel be divided into figure A,
Scheme B, figure C, figure tetra- sub-image sections of D.
Addressed in background technology, the complete image before the non-decile to be transmitted be gop structure, complete image be divided into I, P,
Tri- kinds of B, I are intra-coded frames, and P is forward predicted frame, and B is two-way interpolation frame.Wherein, I frames are a complete picture, institute
The byte quantity that occupies is maximum, and P frames and B frame recordings is variation relative to I frames, and the byte quantity occupied by the two is opposite
It is smaller.Each subgraph after segmentation, it is identical to correspond to former complete picture format, such as when complete image at the A moment is I frames
When, each subgraph after corresponding segmentation is equally I frames at the A moment.
By by image decile in order to carry out parallel encoding, transmission, decoding using multithreading, when shortening whole
Between.
S20：Adjust separately the frame sequence of each subgraph after decile.
In the case where not adjusting the frame sequence of each subgraph, when transmitting each sub-image frame, each subgraph
Frame format is all identical in synchronization, as shown in figure 4, transmitting I, P, the B at each moment in each subgraph figure A~figure D
Frame sequence is identical, thus may be caused, and in subsequent transmission, a certain moment (such as t=8) is carried out at the same time I frame subgraphs
The transmission of picture so that the transmission byte number of the time instances increases sharply, and the corresponding frame image network transmission time is longer, to cause
Video code rate is unstable in transmission.
The purpose of this step is exactly to solve the above problems, specifically, as shown in figure 5, adjusting each subgraph figure A~figure D
In each moment I, P, B frame sequence, to avoid under synchronization, each subgraph is I frames.It thus can be in transmission process
In, amortization of data amount avoids network congestion, keeps the steady of image/video code check transmission.
Specifically, it is assumed that the frame sequence length of existing subgraph figure A~figure D is respectively Igop1, Igop2, Igop3,
Igop4, at the same occur I frames be gap length be Igopt, then Igopt be Igop1, Igop2, Igop3, the minimum of Igop4
Common multiple.
Scheme the frequency that I frames occur simultaneously in A~figure D to reduce, then needs Igopt values to be the bigger the better, therefore setting
When Igop1, Igop2, Igop3, Igop4, the larger prime number of value, such as the frame sequence length of figure A~figure D can be set
11,13,17,19 are taken respectively, as a result, Igopt=Igop1*Igop2*Igop3*Igop4.
After the different frame sequence length for setting subgraph figure A~figure D, quantity is inserted between the adjacent I frames of each subgraph
Different B frames and P frames, so that each sub-image frame sequence meets the frame sequence total length set by it.
S30：Encoding compression processing frame by frame is carried out to each subgraph respectively, and adds synchronizing information and location information.
When the synchronizing information refers to the broadcasting corresponding to the original frame sequence of each subgraph and the frame sequence after adjustment
It carves, location information refers to position of each subgraph in original image, such as upper left, upper right, lower-left, bottom right etc..
In this step, for each subgraph that each coding compression is completed, step S40 is executed；The subgraph of queuing code
Picture, then sequence waits for successively.
S40：Compressed each sub-image data will be encoded to export by network.
The frame sequence for each subgraph that coding compression is completed sequentially is sent successively, i.e., shown in Fig. 4, the 0th of figure A~figure D the
At the moment, the 1st moment ... is until all frame sequence end of transmissions.
Fig. 6 show the flow diagram of image receiving terminal, in conjunction with Fig. 1, image receiving terminal execute the step of include：
S50：Described image data are received by network.
In this step, image receiving terminal receives the frame sequence for each subgraph figure A~figure D that image transmitting terminal is sent.
S60：Processing is decoded to the data of received each subgraph successively.
S70：Each subgraph is restored according to synchronizing information.
Wherein, each subgraph decoded is frame sequence shown in Fig. 5, is first depending on synchronizing information and identifies in step S20,
It is inserted into quantity different B frames and P frames between the adjacent I frames of each subgraph, and is deleted.Each subgraph reverts to original after deletion
Beginning frame sequence length.
S80：Each subgraph is combined according to location information, restores original image.
Position of this step according to each subgraph in original image, is restored, to restore original image.
Fig. 7 show the time diagram that image is transmitted using the present invention program, it is assumed that figure A~every piece of picture material of figure D
Very close to, the time for encoding compression can be very close to, theoretically the scramble time of each block diagram picture add together with Tc very close to.After compression
Data volume also can be very close to, to which transmission time also can be very close to, decoding time also very close to.For easy analysis, it is assumed that
Each small images scramble time is equal, is using the Tc/4 of prior art time, transmission time is using the prior art time
Tt/4, decoding time be using the prior art time Td/4.After technical solution of the present invention, total time T1, T1=
Tc+Tt/4+Td/4.Obvious T1 ＜ T0.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention.For example, working as original image
After carrying out piecemeal, it is assumed that picture material differs greatly, and in order to further increase image transmitting speed, further includes after step S20
Following steps：
Analysis of image content is carried out to the image after piecemeal, to determine picture material difference.Still to scheme A~figure D citings, point
A~figure D will not schemed and carry out binary conversion treatment, the gray value of the pixel on each image is made to be rendered as 0~255.
A gray difference threshold k is preset, calculates figure A first, it is more adjacent one by one by scheming A the first rows (or row)
The gray difference of two pixels is recorded when difference is more than K.Final neighbor pixel of the statistics gray difference more than K
Group number MA.
Then calculate figure B~figure D, record respectively the neighbor pixel of gray difference in each image more than K group number MB,
MC、MD。
The size for comparing MA~MD finds out minimum value therein as a reference value.If being worth on the basis of MA, it is respectively compared MA
Proportionate relationship between MB, MC, MD is right using the proportionate relationship as the foundation for carrying out secondary decile processing to figure B~figure D
Scheme B~figure D to carry out the number of decile to be aforementioned proportion relationship, when aforementioned proportion relationship non-integer, carries out rounding.
By upper, the purpose for comparing neighbor pixel grey value difference in figure is, confirms the content of the image.When in image
The group number of neighbor pixel grey value difference is more, indicates that the picture material is abundanter；Otherwise when neighbor pixel ash in image
The group number of angle value difference is fewer, indicates that the picture material is simpler.Such as the backgrounds such as blue sky, neighbor pixel gray value is almost
There is no difference.
Based on this, the piecemeal minimum using picture material carries out secondary piecemeal, content as benchmark, for the image more than content
How secondary the block number of piecemeal time-division more be more, so that the scramble time of each image is identical, so as to further improve figure
As transmission time.
In short, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all wrap
Containing within protection scope of the present invention.
Claims (8)
1. a kind of sending method of GOP images group, which is characterized in that including：
A, the image sequence for being included for the GOP to be sent, according to a partitioning scheme by each image segmentation be at least two
Subgraph forms corresponding at least two subimage sequence；Wherein, divided image is known as dad image；
B, it is directed to each subgraph, encoded, be packaged and sent respectively by its decile, and using multithreading, the packing
Including loading position information and synchronizing information；Wherein, each subgraph synchronizing information of corresponding same dad image is identical, the position
Information is used to describe position of the subgraph in corresponding dad image；
Further include step after step A：Each subgraph is compared into row differences, two are carried out to subgraph according to comparison result
Secondary dividing processing；
It is described to each subgraph into row differences compare including：
Determine subgraph on the basis of the minimum image of content；
Other subgraphs are compared with benchmark image respectively, determine the content deltas with benchmark subgraph.
2. according to the method described in claim 1, it is characterized in that, each subgraph inherit corresponding each dad image I,
P or B frame formats；I, P and B frame is respectively intra-coded frame, forward predicted frame and two-way interpolation frame in GOP；
Further include before being sent described in step B：At the time of adjusting I frames transmission in an at least subimage sequence.
3. according to the method described in claim 2, it is characterized in that, I frames transmission in an adjustment at least subimage sequence
Moment includes：
Adjust the image sequence length of each subgraph；
Between the adjacent I frames of each subimage sequence, it is inserted into quantity different P frames and/or B frames.
4. according to the method described in claim 3, it is characterized in that, the image sequence length of each subgraph be quantitative value each other
Different prime numbers.
5. according to the method described in claim 2, it is characterized in that, I frames transmission in an adjustment at least subimage sequence
Moment includes：
Adjust the transmission sequence of each I frames, P frames and B frames in each subimage sequence.
6. according to the method described in claim 1, it is characterized in that, determining that benchmark subgraph includes step：
Preset a gray difference threshold k；
Binary conversion treatment is carried out to each subgraph；
To each subgraph after binary conversion treatment, by the first row or column of the subgraph, more adjacent two pixel one by one
Gray difference is recorded when gray difference is more than the gray difference threshold k；
The gray difference for counting adjacent two pixel of each subgraph is more than the group number of the gray difference threshold k, and group number is most
Subgraph on the basis of small corresponding subgraph.
7. according to the method described in claim 1, it is characterized in that, carrying out two to other non-referenced subgraphs according to comparison result
Secondary dividing processing includes：According to the ratio of other subgraphs and the gray difference of benchmark subgraph, to other non-reference images into
The processing of row secondary splitting.
8. a kind of method of reseptance of the sending method based on any GOP images groups of claim 1-7, which is characterized in that packet
It includes：
C, it for each subgraph of each subimage sequence, received, unpacked and is decoded respectively；
D, corresponding each subgraph is constituted into each dad image according to synchronizing information and location information, forms received GOP
Including image sequence.
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| CN107197369B (en) * | 2017-06-06 | 2020-01-14 | 清华大学 | Video streaming media parallel decoding method with cooperation of multiple sub-streams |
| CN108921869B (en) * | 2018-06-29 | 2021-05-25 | 新华三信息安全技术有限公司 | Image binarization method and device |
| CN113316028B (en) * | 2020-02-27 | 2022-03-08 | 华为技术有限公司 | Screen projection method, screen projection equipment and storage medium |
| CN111447339A (en) * | 2020-03-26 | 2020-07-24 | 西安万像电子科技有限公司 | Image transmission method and system |
| CN113473106A (en) * | 2021-06-18 | 2021-10-01 | 青岛小鸟看看科技有限公司 | Image transmission method, image display and processing device, and image transmission system |
| CN116737097B (en) * | 2022-09-30 | 2024-05-17 | 荣耀终端有限公司 | Screen projection image processing method and electronic equipment |
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| CN103873869A (en) * | 2012-12-18 | 2014-06-18 | 北京市勤能通达科技有限公司 | Code rate control method |
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