CN114422807B - Transmission optimization method based on Spice protocol - Google Patents
Transmission optimization method based on Spice protocol Download PDFInfo
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- CN114422807B CN114422807B CN202210308403.7A CN202210308403A CN114422807B CN 114422807 B CN114422807 B CN 114422807B CN 202210308403 A CN202210308403 A CN 202210308403A CN 114422807 B CN114422807 B CN 114422807B
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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
- H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/22—Matching criteria, e.g. proximity measures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
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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
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
Abstract
The invention relates to the technical field of computer science, in particular to a transmission optimization method based on a Spice protocol, which comprises the following steps: s1, obtaining a buffer image which is transmitted and a new frame image to be transmitted; s2, comparing the new frame image with the cache image, and recording the corresponding positions of the image block and the cache image if the image block in the new frame image is matched and hit with the cache image; and S3, sending all the missed image blocks of the new frame image and all the hit image blocks of the cache image. The method is based on the analysis of the transmission image, the transmission data is further optimized, and the data transmission quantity is reduced on the basis of not reducing the image quality, so that smooth use experience can be obtained under the condition of extreme network conditions such as a wide area network and the like.
Description
Technical Field
The invention relates to the technical field of computer science, in particular to a transmission optimization method based on a Spice protocol.
Background
Currently, the demand for home office and remote office becomes more and more extensive, and among these, the remote office environment based on the VDI architecture is the mainstream. Therefore, an access protocol capable of supporting smooth access to the remote virtual host under the condition of the wide area network inevitably brings better use experience to users. Currently, the mainstream access protocols are many and have advantages and disadvantages, while the Spice protocol is a completely open source protocol, and is relatively complete in function and compatibility, and the support of the Spice protocol under the wide area network is mainly focused on compressing images and capturing video streaming agents. However, these methods do not fully satisfy the requirements of practical production and use, and often suffer from unsmooth and unsmooth operation during the use process.
For example, the invention of "an image transmission method under desktop virtualization SPICE protocol" (application number CN 104768009B) in china discloses an image transmission method under desktop virtualization SPICE protocol. The specific process is as follows: firstly, establishing an intermediate layer, and setting a compression structural body and a decompression structural body for a selected compression algorithm; the intermediate layer extracts input data required by compression of a selected compression algorithm from the data to be compressed transmitted by the SPICE protocol and stores the input data into the compression structure; then the middle layer sends the compressed structural body to the compression algorithm for compression; then the compressed data stored in the compressed structure body is stored in a structure body for transmitting the protocol itself and is transmitted to a data decompression end; at a data decompression end, the intermediate layer extracts input data required by decompression of a selected compression algorithm from compressed data transmitted by a protocol and stores the input data into the decompression structure; and then sends it to the compression algorithm for decompression. The application essentially adds an NSC lossy compression algorithm into SPICE, thereby obtaining higher compression ratio, occupying less network bandwidth and not relating to reducing the transmission data volume from the transmission image.
Therefore, there is a need to provide a transmission method for solving the problems of stutter and unsmooth transmission of the Spice protocol.
Disclosure of Invention
Solves the technical problem
Aiming at the defects in the prior art, the invention provides a transmission optimization method based on a Spice protocol, which is based on the analysis of a transmission image, further optimizes transmission data, reduces the data transmission quantity on the basis of not reducing the image quality, and further meets the requirement of obtaining smooth use experience under the condition of wide area network and other extreme network conditions.
Technical scheme
In order to realize the purpose, the invention is realized by the following technical scheme:
the invention provides a Spice protocol-based transmission optimization method, which comprises the following steps:
s1, obtaining a buffer image which is transmitted completely and a new frame image to be transmitted;
s2, comparing the new frame image with the cache image, and recording the corresponding positions of the image block and the cache image if the image block in the new frame image is matched and hit with the cache image;
and S3, sending all the missed image blocks of the new frame image and all the hit image blocks of the cache image.
Further, the comparing the new frame image with the cached image specifically includes:
carrying out similarity matching on the new frame image and all images in a cache chain, finding out the image with the maximum similarity with the new frame image in the cache chain, and if the similarity between the new frame image and the image with the maximum similarity is smaller than a basic threshold value, adding the new frame image to the tail part of the cache chain; and if the similarity between the new frame image and the image with the maximum similarity between the new frame image and the new frame image is greater than a basic threshold value, correspondingly cutting the image with the maximum similarity between the new frame image and the new frame image into image blocks.
Further, the image with the maximum similarity between the new frame image and the new frame image is correspondingly cut into image blocks by the power of M of 2, wherein M represents the similarity between the new frame image and the image with the maximum similarity between the new frame image and the new frame image.
Further, step S2 further includes: and matching the new frame image with all image blocks of the cache image, if the new frame image is hit, recording position information of hit image blocks, then adding the hit image blocks of the cache image to an image block chain, adding 1 to a hit value, and updating hit time until the matching is completed to obtain the complete image block chain.
Further, step S2 further includes: and sequencing the image block chain, if the hit value is increased, comparing the hit value of the currently increased hit image block with the hit value of the previous hit image block, and if the hit value of the currently increased hit image block is greater than the hit value of the previous hit image block, inserting the currently increased hit image block in front of the previous hit image block.
Further, repacking the position information of all hit image blocks of the complete image block chain, which need to be drawn, and the data information of the missed image blocks, which is acquired from the new frame image, to form new data to be transmitted, and transmitting the new data.
Further, the transmission method is transmission through a display channel connected with the client.
Further, the method also comprises the following steps: and cleaning the cache image at regular time.
Based on the same inventive concept, the present invention also provides an electronic device comprising a processor and a memory, wherein the memory stores a computer program, and the computer program realizes the method of any one of the above items when being executed by the processor.
Based on the same inventive concept, the present invention further provides a readable storage medium, in which a computer program is stored, and the computer program, when executed by a processor, implements the method of any one of the above.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
1) The method provided by the invention is based on the analysis of the transmission image, the transmission data is further optimized, and the data transmission quantity is reduced on the basis of not reducing the image quality, so that the smooth use experience can be obtained under the condition of wide area network and other extreme network conditions;
2) According to the invention, through dynamic cutting of the image, unnecessary calculation amount caused by fixed cutting of the image size is reduced;
3) According to the method, the images are cut according to the ratio through similarity comparison of the images, so that similar image blocks can be better matched, and the matching precision is improved;
4) According to the method, the images can be matched more quickly through the hit degree sorting;
5) The invention reduces the occupation of the memory by releasing the images which are not matched for the longest time in a fixed time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic flowchart illustrating steps of a transmission optimization method based on a Spice protocol according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a hit value sorting in a transmission optimization method based on a Spice protocol according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a transmission optimization method based on a Spice protocol, including the following steps:
s1, obtaining a buffer image which is transmitted completely and a new frame image to be transmitted;
s2, comparing the new frame image with the cache image, and recording the corresponding positions of the image block and the cache image if the image block in the new frame image is matched and hit with the cache image;
and S3, sending all the missed image blocks of the new frame image and all the hit image blocks of the cache image.
In specific implementation, a new frame image to be transmitted is firstly compared with a cache image in a cache, if the new frame image is matched and hit with a certain block of image of the cache image, the position of the hit image is recorded, and new image data to be transmitted is formed together with the missed image, so that the image data information required to be transmitted is reduced. Therefore, based on the fact that a large number of same image frames or image blocks appear in the image frames within a period of time in the transmission process, the image data amount needing to be sent can be effectively reduced by comparing the image blocks at the server side, and therefore the bandwidth is saved.
In this embodiment, the comparing the new frame image with the cached image specifically includes: carrying out similarity matching on the new frame image and all images in a cache chain, finding out an image with the maximum similarity with the new frame image in the cache chain, and if the similarity between the new frame image and the image with the maximum similarity is smaller than a basic threshold value, adding the new frame image to the tail of the cache chain, which is equivalent to that the new frame image is completely a new image; and if the similarity between the new frame image and the image with the maximum similarity between the new frame image and the new frame image is greater than a basic threshold value, correspondingly cutting the image with the maximum similarity between the new frame image and the new frame image into image blocks.
In this embodiment, the new frame image and the image with the maximum similarity to the new frame image are correspondingly cut into image blocks by the power of 2M, where M represents the similarity between the new frame image and the image with the maximum similarity to the new frame image, and through dynamic cutting of the images, unnecessary calculation amount caused by fixed cut image size is reduced, and through comparison of the similarities of the images, image cutting is performed according to a ratio, so that similar image blocks can be better matched, and matching accuracy is improved.
In this embodiment, step S2 further includes: and matching the new frame image with all image blocks of the cache image, if the new frame image is hit, recording position information of hit image blocks, then adding the hit image blocks of the cache image to an image block chain, adding 1 to a hit value, and updating hit time until the matching is completed to obtain the complete image block chain.
In this embodiment, position information of all hit image blocks of the complete image block chain, which need to be drawn, and data information of missed image blocks, which is obtained from the new frame image, are repackaged to form new data to be transmitted, and the new data are transmitted. And the transmission method is transmission through a display channel connected with the client.
During specific operation, firstly, the similarity of a new frame image to be sent and a cache image sent in a cache is compared; if the similarity is greater than the basic threshold value T0 and the images in the cache are not segmented before, the images are segmented step by step according to the power of 2 of the similarity to form small image blocks with the same size, comparison is carried out in sequence, if hit occurs, the hit H value of the image is added with 1, and the similarity T1 is recorded; and if the similarity is smaller than the basic threshold value T0, directly adding the new frame image as a new picture into the cache image. And (3) sequencing the cache images in the cache according to the hit degree H and sequencing the last hit time to form a binary group (H, time), and if the similarity of the new frame image is greater than T1, performing power-2 segmentation on the new frame image according to the ratio of T1 and comparing the new frame image with the cache images in the cache. And if the similarity of the new frame image is smaller than T1 and larger than T0, segmenting the new frame image according to the new similarity T2. And combining the position information P1 drawn by the hit image, the position information P2 in the cache of the hit image and the missed image information into new data to be sent, and sending the new data to the client.
In this embodiment, as shown in fig. 2, step S2 further includes: sequencing the image block chains, wherein images 1-5 represent the numbers of the images, each image has the unique number, H represents the hit degree, time represents the hit time, if the hit value is increased, the hit value of the currently increased hit image block is compared with the hit value of the previous hit image block, and if the hit value of the currently increased hit image block is greater than the hit value of the previous hit image block, the currently increased hit image block is inserted before the previous hit image block; through hit sorting, images can be matched more quickly.
In this embodiment, the method further includes: and cleaning the cached images at regular time, cleaning the information in the cache at regular time by the server, deleting the images which are missed for the longest time from the cache so as to release the memory, sending synchronous information to the client, and synchronously deleting the information in the memory by the client. And the images which are not matched for the longest time are released at fixed time, so that the occupation of the memory is reduced.
Based on the same inventive concept, the present invention further provides an electronic device, which includes a processor and a memory, where the memory stores a computer program, and when the computer program is executed by the processor, the method for optimizing transmission based on the Spice protocol is implemented.
The processor may be, in some embodiments, a Central Processing Unit (CPU), a controller, a microcontroller, a microprocessor (e.g., a GPU), or other data Processing chip. The processor is typically used to control the overall operation of the electronic device. In this embodiment, the processor is configured to execute the program code stored in the memory or process data, for example, execute the program code of the transmission optimization method based on the Spice protocol.
The memory includes at least one type of readable storage medium including a flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Programmable Read Only Memory (PROM), a magnetic memory, a magnetic disk, an optical disk, etc. In some embodiments, the storage may be an internal storage unit of the electronic device, such as a hard disk or a memory of the electronic device. In other embodiments, the memory may also be an external storage device of the electronic device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the electronic device. Of course, the memory may also include both internal and external memory units of the electronic device. In this embodiment, the memory is generally configured to store an operating method installed in the electronic device and various types of application software, such as a program code of the transmission optimization method based on the Spice protocol. In addition, the memory may also be used to temporarily store various types of data that have been output or are to be output.
Based on the same inventive concept, the present invention further provides a readable storage medium, wherein a computer program is stored in the readable storage medium, and when the computer program is executed by a processor, the transmission optimization method based on the Spice protocol is implemented.
The method has the advantages that the method further optimizes the transmission data based on the analysis of the transmission image, reduces the data transmission quantity on the basis of not reducing the image quality, and accordingly can obtain smooth use experience under the condition of an extreme network such as a wide area network and the like; furthermore, the invention reduces unnecessary calculation amount brought by fixed cutting image size through dynamic cutting of the image; furthermore, the image is cut according to the ratio through the similarity comparison of the images, so that similar image blocks can be better matched, and the matching precision is improved; furthermore, the images can be matched more quickly through the hit degree sequencing; finally, the invention reduces the occupation of the memory by releasing the images which are not matched for the longest time in a timing way.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A transmission optimization method based on a Spice protocol is characterized by comprising the following steps:
s1, obtaining a buffer image which is transmitted and a new frame image to be transmitted;
s2, comparing the new frame image with the cache image, recording the corresponding positions of the new frame image and the cache image if a certain image block in the new frame image is matched and hit with the cache image, comparing the new frame image with the cache image, and recording the corresponding positions of the new frame image and the cache image if a certain image block in the new frame image is hit with the cache image, wherein the steps specifically comprise: carrying out similarity matching on the new frame image and all images in a cache chain, finding out the image with the maximum similarity with the new frame image in the cache chain, and if the similarity between the new frame image and the image with the maximum similarity is smaller than a basic threshold value, adding the new frame image to the tail part of the cache chain; if the similarity between the new frame image and the image with the maximum similarity between the new frame image and the new frame image is larger than a basic threshold value, correspondingly cutting the image with the maximum similarity between the new frame image and the new frame image into image blocks; if the image matching of a certain image block in the new frame image and the image with the maximum similarity of the new frame image is hit, recording the corresponding positions of the image block and the image;
and S3, sending all the missed image blocks of the new frame image and all the hit image blocks of the cache image.
2. The Spice protocol-based transmission optimization method of claim 1, wherein the step S2 further comprises: if a certain image block in the new frame image is matched and hit with the image with the maximum similarity of the new frame image, recording the position information of the hit image block, then adding the hit image block of the cache image to an image block chain, adding 1 to the hit value, and updating the hit time at the same time until the matching is completed to obtain the complete image block chain.
3. The Spice protocol-based transmission optimization method of claim 2, wherein the step S2 further comprises: and sequencing the image block chain, if the hit value is increased, comparing the hit value of the currently increased hit image block with the hit value of the previous hit image block, and if the hit value of the currently increased hit image block is greater than the hit value of the previous hit image block, inserting the currently increased hit image block in front of the previous hit image block.
4. The Spice protocol-based transmission optimization method of claim 3, wherein position information of all hit image blocks of the complete image block chain, which need to be drawn, and data information of missed image blocks, which is obtained from the new frame image, are repackaged to form new data to be transmitted for transmission.
5. The Spice protocol-based transmission optimization method of claim 4, wherein the transmission method is transmission through a display channel connected to a client.
6. The Spice protocol-based transmission optimization method of claim 1, further comprising: and cleaning the cache image at regular time.
7. An electronic device, comprising a processor and a memory, the memory having stored thereon a computer program which, when executed by the processor, implements the method of any of claims 1-6.
8. A readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method of any one of claims 1 to 6.
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