CN111182306B - Video extraction method, system, terminal and storage medium for video compression - Google Patents
Video extraction method, system, terminal and storage medium for video compression Download PDFInfo
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- 238000000605 extraction Methods 0.000 title claims abstract description 71
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- 238000007906 compression Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 claims description 21
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 5
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- 230000008878 coupling Effects 0.000 description 3
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- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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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
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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
- H04N19/423—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 characterised by memory arrangements
Abstract
The invention provides a video extraction method, a system, a terminal and a storage medium for video compression, which comprise the following steps: acquiring extraction configuration information set by a system through an APB interface; acquiring the resource state of a cache device; generating extraction control information according to the extraction configuration information and the resource state; and reading the video information in the memory through a high-performance expansion bus according to the extracted control information, and transmitting the video information to a video compression device through a cache device. The invention realizes the controllability of the video compression task by controlling the video information transmitted to the video compression device, and avoids the video transmission delay caused by the long-time blockage of the video compression task.
Description
Technical Field
The invention relates to the technical field of servers, in particular to a video extraction method, a system, a terminal and a storage medium for video compression.
Background
In the field of the current server, the BMC management system becomes an indispensable important component in server monitoring and management, provides rich management interfaces between management software and a hardware platform, can monitor the running state of the server in real time, discover and record running faults, provides means for remote login and maintenance, provides functions of safety management, power management, asset management and the like for the running of the server, and ensures the normal running of the server.
The remote desktop display function uses a video compression technology, a display card in the host receives display information of an operating system, on one hand, a VGA signal is formed and displayed locally, and on the other hand, data in the VGA signal is stored in a system memory according to a certain format for remote desktop display. The video compression module reads VGA data from the memory and compresses the VGA data to reduce the quantity of transmission data of the Ethernet, and the compressed data is stored in a corresponding position in the memory. The Ethernet card reads the compressed data from the memory and transmits the compressed data to the remote end, and the remote desktop decompresses and displays the received data. The video compression module adopts corresponding JPEG compression IP, and completes video compression according to one image compression.
Due to the fact that the amount of compressed videos is large, the problems that compression is blocked due to excessive video information, a video compression task is uncontrollable and the like exist in the application of the existing video compression.
Disclosure of Invention
In view of the foregoing disadvantages in the prior art, the present invention provides a video extraction method, system, terminal and storage medium for video compression, so as to solve the foregoing technical problems.
In a first aspect, the present invention provides a video extraction method for video compression, including:
acquiring extraction configuration information set by a system through an APB interface;
acquiring the resource state of a cache device;
generating extraction control information according to the extraction configuration information and the resource state;
and reading the video information in the memory through a high-performance expansion bus according to the extracted control information, and transmitting the video information to a video compression device through a cache device.
Further, the generating extraction control information according to the extraction configuration information and the resource status includes:
writing the capture mode in the extraction configuration information, the position and the space size of the video data stored in the memory and the resolution information of the video into extraction control information;
judging whether the resources of the cache device are full:
and if so, generating extraction control information for stopping extracting the video information.
Further, the generating extraction control information according to the extraction configuration information and the resource status includes:
and buffering the control information by adopting an APB clock domain and an AXI clock domain in a buffer device to realize the signal synchronization of the control information.
Further, the method further comprises:
acquiring the working state of a video compression device;
if the video compression device is blocked, generating a frame loss control signal;
and discarding the video information read from the memory according to the frame loss control signal.
Further, the method further comprises:
determining the position of a frame head and the position of a frame tail according to the resolution information and the quantity of the video information extracted from the memory;
and writing a frame head mark and a frame tail mark into the video information in the caching device according to the frame head position and the frame tail position.
In a second aspect, the present invention provides a video extraction system for video compression, comprising:
the configuration acquisition unit is configured to acquire the extraction configuration information set by the system through the APB interface;
the resource monitoring unit is configured to acquire the resource state of the cache device;
a control generation unit configured to generate extraction control information according to the extraction configuration information and the resource state;
and the video extraction unit is configured to read the video information in the memory through a high-performance expansion bus according to the extraction control information and transmit the video information to the video compression device through the cache device.
Further, the control generation unit includes:
a configuration writing module configured to write the capture mode, the position and the space size of the video data stored in the memory, and the resolution information of the video in the extraction configuration information into the extraction control information;
the resource judging module is configured for judging whether the resources of the cache device are full;
and the extraction stopping module is configured for generating extraction control information for stopping extracting the video information if the resources of the cache device are full.
Further, the system further comprises:
the compression monitoring unit is configured for acquiring the working state of the video compression device;
a frame loss control unit configured to generate a frame loss control signal if the video compression apparatus is blocked;
and the information discarding unit is configured to discard the video information read from the memory according to the frame loss control signal.
In a third aspect, a terminal is provided, including:
a processor, a memory, wherein,
the memory is used for storing a computer program which,
the processor is used for calling and running the computer program from the memory so as to make the terminal execute the method of the terminal.
In a fourth aspect, a computer storage medium is provided having stored therein instructions that, when executed on a computer, cause the computer to perform the method of the above aspects.
The beneficial effect of the invention is that,
the video extraction method, the system, the terminal and the storage medium for video compression provided by the invention issue and extract configuration information through an APB bus by the upper layer of the system, analyze and convert the configuration information into corresponding control signals, simultaneously monitor the state of a cache device (output FIFO), generate control signals according to the state of the cache device, and utilize an AXI Master to read and write the memory according to all the generated control signals. The AXI Master is externally connected with an AXI bus of the system through an interface, so that the memory is operated. In addition, the video information read from the memory is written into the output FIFO and then supplied to the video compression apparatus. The invention realizes the controllability of the video compression task by controlling the video information transmitted to the video compression device, and avoids the video transmission delay caused by the long-time blockage of the video compression task.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention.
FIG. 2 is a schematic flow diagram of a method of one embodiment of the invention.
FIG. 3 is a schematic block diagram of a system of one embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following explains key terms appearing in the present invention.
Baseboard Management Controller (BMC)
VGA: video graphics array Video image array
RGB: red green Blue industry standard color
APB: advanced Peripheral Bus
AHB: advanced High performance Bus
AXI: the Advanced eXtensible Interface high-performance expansion bus comprises an AXI (Advanced eXtensible Interface) master and an AXI slave at two ends of the AXI bus respectively, wherein the AXI master reads information of the AXI slave.
FIFO: first Input First Output cache
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention. Among them, the implementation subject of fig. 1 may be a video extraction system for video compression.
As shown in fig. 1, the method 100 includes:
In order to facilitate understanding of the present invention, the video extraction method for video compression provided by the present invention is further described below with reference to the principle of the video extraction method for video compression of the present invention and the process of extracting the video before compression in the embodiment.
Specifically, as shown in fig. 2, the video extraction method for video compression includes:
and S1, acquiring the extraction configuration information of the system setting through the APB interface.
And setting an extraction configuration file on the upper layer of the system, and acquiring the extraction configuration file from the system through an APB bus. Extracting the configuration file includes: the position and space size of the video data stored in the memory, and the resolution information of the video. By using the information, the module can know the position of reading data from the memory and judge the start and the end of one frame of data. Also included are a single frame capture mode and a continuous capture mode. When the single frame capture mode is set, the invention captures a frame, then stops taking data from the memory, and then generates an interrupt.
And S2, acquiring the resource state of the cache device.
Judging the state of the buffer device (output FIFO), and if the FIFO state is not full, controlling the AXI master module to read the memory data. And when the FIFO is full, stopping the AXI master module from reading the memory data.
And S3, generating extraction control information according to the extraction configuration information and the resource state.
Signals in the APB clock domain are synchronized into the AXI clock domain, thereby generating control signals for the AXI Master. The synchronization mode is that control information obtained by analyzing the information configured by the APB is written into an asynchronous FIFO in an APB clock domain, and then an AXI Master reads the FIFO information in an AXI clock domain.
The control information includes: the memory start address, size, resolution, start/stop signal, frame loss signal, frame head and tail mark signal, capture mode, etc.
And S4, reading the video information in the memory through a high-performance expansion bus according to the extracted control information, and transmitting the video information to a video compression device through a cache device.
And generating a memory reading initial address according to the control information provided by the control module. And sets burst transmission parameters. When the start signal is active, the read address channel and the read data signal of the AXI Master start to operate, and the read data is written into the output FIFO. When the stop signal is valid, the AXI Master stops generating a new read address, and the read data channel stops after reading the current BURST data. The read video information is buffered in the FIFO and transferred from the FIFO to the video compression apparatus.
The state of the video compression device is monitored, and if the video compression device is blocked, a frame loss control signal is generated. When the frame loss control signal is valid, the read address channel and the read data signal of the AXI Master start working, and data is read from the memory, but data is not written into the FIFO any more.
If the marked frame head and frame tail exist in the extracted configuration information, the positions of the frame head and the frame tail are judged according to the resolution information and the quantity of data read from the memory, and a control signal inserted into the frame head and the frame tail is generated and is transmitted to the AXI Master module. The AXI master module writes frame header and tail flag data into the output FIFO at a proper position according to a control signal of the control module, which is inserted into the frame header and the tail.
As shown in fig. 3, the system 300 includes:
a configuration acquiring unit 310 configured to acquire extracted configuration information of the system setting through an APB interface;
a resource monitoring unit 320 configured to obtain a resource state of the cache device;
a control generating unit 330 configured to generate extraction control information according to the extraction configuration information and the resource status;
the video extracting unit 340 is configured to read video information in the memory through the high performance expansion bus according to the extraction control information, and transmit the video information to the video compressing apparatus through the cache apparatus.
Optionally, as an embodiment of the present invention, the control generating unit includes:
a configuration writing module configured to write the capture mode, the position and the space size of the video data stored in the memory, and the resolution information of the video in the extraction configuration information into the extraction control information;
the resource judging module is configured for judging whether the resources of the cache device are full;
and the extraction stopping module is configured for generating extraction control information for stopping extracting the video information if the resources of the cache device are full.
Optionally, as an embodiment of the present invention, the system further includes:
the compression monitoring unit is configured for acquiring the working state of the video compression device;
a frame loss control unit configured to generate a frame loss control signal if the video compression apparatus is blocked;
and the information discarding unit is configured to discard the video information read from the memory according to the frame loss control signal.
Fig. 4 is a schematic structural diagram of a terminal system 400 according to an embodiment of the present invention, where the terminal system 400 may be used to execute the video extraction method for video compression according to the embodiment of the present invention.
The terminal system 400 may include: a processor 410, a memory 420, and a communication unit 430. The components communicate via one or more buses, and those skilled in the art will appreciate that the architecture of the servers shown in the figures is not intended to be limiting, and may be a bus architecture, a star architecture, a combination of more or less components than those shown, or a different arrangement of components.
The memory 420 may be used for storing instructions executed by the processor 410, and the memory 420 may be implemented by any type of volatile or non-volatile storage terminal or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The executable instructions in memory 420, when executed by processor 410, enable terminal 400 to perform some or all of the steps in the method embodiments described below.
The processor 410 is a control center of the storage terminal, connects various parts of the entire electronic terminal using various interfaces and lines, and performs various functions of the electronic terminal and/or processes data by operating or executing software programs and/or modules stored in the memory 420 and calling data stored in the memory. The processor may be composed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs connected with the same or different functions. For example, the processor 410 may include only a Central Processing Unit (CPU). In the embodiment of the present invention, the CPU may be a single operation core, or may include multiple operation cores.
A communication unit 430, configured to establish a communication channel so that the storage terminal can communicate with other terminals. And receiving user data sent by other terminals or sending the user data to other terminals.
The present invention also provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in the embodiments provided by the present invention when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).
Therefore, the invention issues and extracts the configuration information through the APB bus by the upper layer of the system, analyzes and converts the configuration information into corresponding control signals, simultaneously monitors the state of the buffer device (output FIFO), generates the control signals according to the state of the buffer device, and utilizes the AXI Master to read and write the memory according to all the generated control signals. The AXI Master is externally connected with an AXI bus of the system through an interface, so that the memory is operated. In addition, the video information read from the memory is written into the output FIFO and then supplied to the video compression apparatus. According to the invention, the controllability of the video compression task is realized by controlling the video information transmitted to the video compression device, and the video transmission delay caused by long-time blocking of the video compression task is avoided.
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be embodied in the form of a software product, where the computer software product is stored in a storage medium, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like, and the storage medium can store program codes, and includes instructions for enabling a computer terminal (which may be a personal computer, a server, or a second terminal, a network terminal, and the like) to perform all or part of the steps of the method in the embodiments of the present invention.
The same and similar parts in the various embodiments in this specification may be referred to each other. Especially, for the terminal embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant points can be referred to the description in the method embodiment.
In the embodiments provided in the present invention, it should be understood that the disclosed system and method can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, systems or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A video extraction method for video compression, comprising:
acquiring extraction configuration information set by a system through an APB interface;
acquiring the resource state of a cache device;
generating extraction control information according to the extraction configuration information and the resource state;
reading video information in a memory through a high-performance expansion bus according to the extracted control information, and transmitting the video information to a video compression device through a cache device;
the generating extraction control information according to the extraction configuration information and the resource state includes:
writing the capture mode in the extraction configuration information, the position and the space size of the video data stored in the memory and the resolution information of the video into extraction control information;
judging whether the resources of the cache device are full:
and if so, generating extraction control information for stopping extracting the video information.
2. The method of claim 1, wherein generating extraction control information according to extraction configuration information and the resource status comprises:
and buffering the control information by adopting an APB clock domain and an AXI clock domain in a buffer device to realize the signal synchronization of the control information.
3. The method of claim 1, further comprising:
acquiring the working state of a video compression device;
if the video compression device is blocked, generating a frame loss control signal;
and discarding the video information read from the memory according to the frame loss control signal.
4. The method of claim 1, further comprising:
determining the position of a frame head and the position of a frame tail according to the resolution information and the quantity of the video information extracted from the memory;
and writing a frame head mark and a frame tail mark into the video information in the caching device according to the frame head position and the frame tail position.
5. A video extraction system for video compression, comprising:
the configuration acquisition unit is configured to acquire the extraction configuration information set by the system through the APB interface;
the resource monitoring unit is configured to acquire the resource state of the cache device;
a control generation unit configured to generate extraction control information according to the extraction configuration information and the resource state;
the video extraction unit is configured to read video information in the memory through a high-performance expansion bus according to the extraction control information and transmit the video information to the video compression device through the cache device;
the control generation unit includes:
a configuration writing module configured to write the capture mode, the position and the space size of the video data stored in the memory, and the resolution information of the video in the extraction configuration information into the extraction control information;
the resource judging module is configured for judging whether the resources of the cache device are full;
and the extraction stopping module is configured for generating extraction control information for stopping extracting the video information if the resources of the cache device are full.
6. The system of claim 5, further comprising:
the compression monitoring unit is configured for acquiring the working state of the video compression device;
a frame loss control unit configured to generate a frame loss control signal if the video compression apparatus is blocked;
and the information discarding unit is configured to discard the video information read from the memory according to the frame loss control signal.
7. A terminal, comprising:
a processor;
a memory for storing instructions for execution by the processor;
wherein the processor is configured to perform the method of any one of claims 1-4.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-4.
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| CN112839231B (en) * | 2021-01-15 | 2022-06-07 | 苏州浪潮智能科技有限公司 | Video compression transmission method and system |
| CN116996647B (en) * | 2023-09-22 | 2024-01-26 | 苏州元脑智能科技有限公司 | Video transmission method of BMC, BMC and system-level chip |
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| CN1214574C (en) * | 2002-07-29 | 2005-08-10 | 华为技术有限公司 | Method for carrying out synchronous digital chain connection processing protocol |
| KR100535664B1 (en) * | 2003-10-13 | 2005-12-09 | 엘지전자 주식회사 | Server system communicating through the wireless network |
| CN101651603B (en) * | 2008-08-15 | 2011-12-07 | 中兴通讯股份有限公司 | Method and device for controlling signaling traffic |
| CN102270444B (en) * | 2011-09-07 | 2014-03-26 | 东莞中山大学研究院 | Device for controlling data stream and buffering frame of video processing chip |
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