CN111163316A - High-definition video transmission method and system based on low code stream - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
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- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/184—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being bits, e.g. of the compressed video stream
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Abstract
The invention discloses a high-definition video transmission method and system based on low code stream. The high-definition video transmission method based on the low code stream comprises the following steps: acquiring an image frame in a shot original video; carrying out blocking processing on an original video image in a preset macro block mode, and confirming that the image frame subjected to the blocking processing is a first image frame; performing intra-frame prediction processing on the first image frame, and confirming that the image frame subjected to the intra-frame prediction processing is a second image frame; and repackaging each second image frame into a high-definition video, and transmitting the high-definition video in a low-code-stream mode. The invention can realize the transmission of high-definition video meeting the ONVIF protocol standard under the network transmission condition of low code stream under the specific environment (field investigation, cultural relic transfer, civil exhibition and exhibition) in the field of cultural relic exhibition and overcomes the defect that the transmission of high-definition video is difficult under the condition that the network condition is not ideal enough.
Description
Technical Field
The invention relates to the technical field of cultural relic exhibition, in particular to a method and a device for transmitting high-definition video based on low code stream.
Background
Whether the outdoor archaeological excavation, the temporary exhibition of cultural relics and the comprehensive monitoring during the transportation process of the cultural relics actually require the continuous and stable real-time transmission of security videos and various data of the scenes; due to the particularity of the application environment, the system does not have a large-capacity wired network and wireless network environment, and one-way or multi-way high-definition video transmission is carried out on the field archaeology and outdoor immovable cultural relic protection in image transmission by means of the existing 3G/4G network even by renting a satellite channel. In the aspects of the transportation of cultural relics and the storage of archaeological excavation cultural relics. How to properly solve the above problems is an urgent issue to be solved in the industry.
Disclosure of Invention
The invention provides a low-code-stream-based high-definition video transmission method and device, which are used for transmitting a high-definition video meeting ONVIF protocol standard under the network transmission condition of a low-code stream under the specific environment (field investigation, cultural relic transfer, civil and military exhibition and the like) in the field of cultural relic exhibition and storage, and overcoming the defect that the high-definition video is difficult to transmit under the condition that the network condition is not ideal enough.
According to a first aspect of the embodiments of the present invention, there is provided a low-code-stream-based high-definition video transmission method, including:
acquiring an image frame in a shot original video;
carrying out blocking processing on an original video image in a preset macro block mode, and confirming that the image frame subjected to the blocking processing is a first image frame;
performing intra-frame prediction processing on the first image frame, and confirming that the image frame subjected to the intra-frame prediction processing is a second image frame;
and repackaging each second image frame into a high-definition video, and transmitting the high-definition video in a low-code-stream mode.
In one embodiment, the acquiring image frames in the captured original video includes:
the number of the image frames in the shot original video is a positive integer greater than three;
the shot original video is a high-definition video.
In one embodiment, the blocking an original video image in a preset macro block manner to determine that the image frame after the blocking is a first image frame includes:
setting specific parameters corresponding to the macro block according to a compression target of the low code stream to obtain a first macro block;
carrying out block processing on an original video image through the first macro block;
and confirming that the image frame subjected to the blocking processing is a first image frame.
In one embodiment, the performing the intra-prediction processing on the first image frame and confirming that the image frame after the intra-prediction processing is the second image frame includes:
analyzing the image characteristics of each macro block of the image frame after the image frame is subjected to blocking processing;
aiming at the image characteristics of different macro blocks, the matched prediction mode is adopted to carry out intra-frame prediction processing so as to achieve higher image compression rate;
and confirming that the image frame subjected to the intra-frame prediction processing is a second image frame.
In one embodiment, the repackaging each second image frame into a high definition video, and transmitting the high definition video in a low-stream manner includes:
and repackaging each second image frame into a high-definition video according to the shooting sequence, and transmitting the high-definition video in a low-code-stream mode.
According to a second aspect of the embodiments of the present invention, there is provided a low-bit-stream-based high-definition video transmission system, including:
the acquisition module is used for acquiring image frames in the shot original video;
the macro block module is used for carrying out blocking processing on an original video image in a preset macro block mode and confirming that the image frame subjected to the blocking processing is a first image frame;
the prediction module is used for carrying out intra-frame prediction processing on the first image frame and confirming that the image frame subjected to the intra-frame prediction processing is a second image frame;
and the packaging module is used for repackaging each second image frame into a high-definition video and transmitting the high-definition video in a low-code-stream mode.
In one embodiment, the macroblock module includes:
the setting unit is used for setting the corresponding specific parameters of the macro block according to the compression target of the low code stream to obtain a first macro block;
the block unit is used for carrying out block processing on the original video image through the first macro block;
and the first confirming unit is used for confirming the image frame subjected to the blocking processing as a first image frame.
In one embodiment, the prediction module comprises:
the analysis unit is used for analyzing the image characteristics of each macro block of the image frame after the image frame is subjected to blocking processing;
the matching unit is used for carrying out intra-frame prediction processing by adopting a matched prediction mode aiming at the image characteristics of different macro blocks so as to achieve higher image compression rate;
and the second confirming unit is used for confirming the image frame subjected to the intra-frame prediction processing as a second image frame.
In one embodiment, the package module includes:
and the generating unit is used for regenerating the high-definition video from each second image frame according to the shooting sequence and transmitting the high-definition video in a low-code-stream mode.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart illustrating a low-stream-based high-definition video transmission method according to an exemplary embodiment of the present invention;
fig. 2 is a flowchart illustrating a step S12 of a method for transmitting a low-stream-based high-definition video according to an exemplary embodiment of the present invention;
fig. 3 is a flowchart illustrating step S13 of a method for transmitting a low-stream-based high-definition video according to an exemplary embodiment of the present invention;
fig. 4 is a flowchart illustrating step S14 of a method for transmitting a low-stream-based high-definition video according to an exemplary embodiment of the present invention;
fig. 5 is a block diagram of a low-stream based high-definition video transmission system according to an exemplary embodiment of the present invention;
fig. 6 is a block diagram of a macroblock module 52 of a low-stream-based high-definition video transmission system according to an exemplary embodiment of the present invention;
fig. 7 is a block diagram illustrating a prediction module 53 of a low-stream based high-definition video transmission system according to an exemplary embodiment of the present invention;
fig. 8 is a block diagram illustrating an encapsulation module 54 of a low-stream based high-definition video transmission system according to an exemplary embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Fig. 1 is a flowchart illustrating a low-bitstream based high definition video transmission method according to an exemplary embodiment, and as shown in fig. 1, the low-bitstream based high definition video transmission method includes the following steps S11-S14:
in step S11, image frames in the captured original video are acquired;
in step S12, performing blocking processing on an original video image in a preset macroblock mode, and determining that the image frame after the blocking processing is a first image frame;
in step S13, performing intra-frame prediction processing on the first image frame, and confirming that the image frame after the intra-frame prediction processing is a second image frame;
in step S14, each second image frame is repackaged into a high definition video, which is transmitted in a low-stream manner.
In one embodiment, no matter the outdoor archaeological excavation, the exhibition of the cultural relics in the exhibition and the comprehensive monitoring in the transfer process of the cultural relics, the continuous and stable real-time transmission of security videos and various data of the scenes is actually required; due to the particularity of the application environment, the system does not have a large-capacity wired network and wireless network environment, one-way or multi-way high-definition video transmission needs to be carried out on the basis of the existing 3G/4G network for the protection of outdoor archaeology and outdoor immovable cultural relics in image transmission, even a satellite channel is rented, meanwhile, the system has special requirements on power supply of video acquisition equipment, and solar energy and wind energy need to be used or portable high-definition video acquisition transmission equipment (equipment with a built-in lithium battery) with long-time standby work needs to be developed. In the aspects of transfer of cultural relics and storage of archaeological excavation cultural relics, besides transmission of video images, real-time monitoring of microbial environment data stored in the cultural relics during transportation is also considered. The technical scheme in the embodiment can properly solve the problems.
And acquiring the image frames in the shot original video. The number of the image frames in the shot original video is a positive integer greater than three; the shot original video is a high-definition video.
And carrying out blocking processing on the original video image in a preset macro block mode, and confirming that the image frame subjected to the blocking processing is the first image frame. Setting specific parameters corresponding to the macro block according to a compression target of the low code stream to obtain a first macro block; carrying out block processing on the original video image through the first macro block; and confirming the image frame after the blocking processing as a first image frame.
And performing intra-frame prediction processing on the first image frame, and confirming that the image frame subjected to the intra-frame prediction processing is a second image frame. Analyzing the image characteristics of each macro block of the image frame after the image frame is subjected to blocking processing; aiming at the image characteristics of different macro blocks, the matched prediction mode is adopted to carry out intra-frame prediction processing so as to achieve higher image compression rate; and confirming that the image frame after the intra-frame prediction processing is the second image frame.
And repackaging each second image frame into a high-definition video, and transmitting the high-definition video in a low-code-stream mode. And repackaging each second image frame into a high-definition video according to the shooting sequence, and transmitting the high-definition video in a low-code-stream mode.
By using the technical scheme in the application, the high-definition video which meets the ONVIF protocol standard can be transmitted under the network transmission condition of low code stream under the specific environment (field investigation, cultural relic transfer, civil exhibition and the like) in the field of cultural relic exhibition, and the defect that the high-definition video is difficult to transmit under the condition that the network condition is not ideal enough is overcome.
In one embodiment, as shown in FIG. 2, step S12 includes the following steps S21-S23:
in step S21, setting specific parameters corresponding to the macro block according to the compression target of the low code stream to obtain a first macro block;
in step S22, performing a blocking process on the original video image by the first macroblock;
in step S23, it is confirmed that the image frame after the blocking process is the first image frame.
In one embodiment, the original video shot is a high definition video, which is not illustrated as a video with a definition of 1080 p. The 1080p video is transmitted through the low code stream, the image of each video frame of the original video needs to be compressed, the pixel points in the video frame of the original video are firstly partitioned, each small partition is called a macro block, and the size of the macro block in the embodiment is N × M pixels. Wherein N and M are positive integers, and the difference between N and M is smaller in the preferred embodiment. By increasing the value of either of N and M, for example, a value of 128 x 128 is used in the preferred embodiment. The low frequency coefficients that can be transformed in a single macroblock have reduced similarity, resulting in less redundancy. Meanwhile, the information content of macroblock-level parameter information such as a prediction mode, a motion vector, a reference frame index and a quantization level of a coding macroblock in subsequent processing can be reduced, and redundancy is further reduced, so that the compression ratio of the original video is improved.
In one embodiment, as shown in FIG. 3, step S13 includes the following steps S31-S33:
in step S31, analyzing image characteristics of each macroblock of the image frame after the blocking process;
in step S32, for the image features of different macroblocks, the matching prediction mode is used to perform intra prediction processing to achieve a higher image compression rate;
in step S33, it is confirmed that the image frame after the intra prediction processing is the second image frame.
In one embodiment, each macro block is predicted through intra-frame, a prediction block is constructed based on the prediction of the same intra-frame coded block, the residual error of the current block is calculated, and the information of the residual error, the prediction mode and the like is coded. The spatial redundancy in the image can be removed. In this embodiment, the prediction mode is greatly expanded from 4, which is commonly used in the art, to 48, which includes the DC prediction mode and the planar prediction mode. More prediction modes can be more accurate aiming at the image characteristics of different macro blocks, and then more accurate prediction modes are obtained to carry out intra-frame prediction processing, so that better image compression rate is achieved. And naming the image frame after the intra-frame prediction processing as a second image frame for subsequent processing.
In one embodiment, as shown in FIG. 4, step S14 includes the following step S41:
in step S41, each second image frame is repackaged into a high-definition video according to the shooting sequence, and the high-definition video is transmitted in a low-code-stream manner.
In one embodiment, after the second image frame is encoded, the second image frame may be encapsulated with corresponding audio to generate a high-compressed high-definition video that can be played by the smart terminal. For example, 1080P Video conforming to the ONVIF (OpenNetwork Video Interface Forum) protocol standard is transmitted through a network of up to 50KB/s, and the size of the macro block is preferably 128 × 128. Under more severe network conditions, for example: under the network condition of 1-6KB/s, videos with CIF image quality can be smoothly transmitted; under the network condition of 6-13KB/s, the video with the D1 image quality can be smoothly transmitted; the 720P picture quality video can be smoothly transmitted under the network condition of 10-15 KB/s; under the network condition of 18-48KB/s, the video with 1080P image quality can be smoothly transmitted.
In one embodiment, fig. 5 is a block diagram illustrating a low-stream based high-definition video transmission system according to an example embodiment. As shown in fig. 5, the system includes an acquisition module 51, a macroblock module 52, a prediction module 53, and a packing module 54.
The obtaining module 51 is configured to obtain an image frame in a captured original video;
the macro block module 52 is configured to perform block processing on an original video image in a preset macro block manner, and determine that an image frame after the block processing is a first image frame;
the prediction module 53 is configured to perform intra-frame prediction processing on the first image frame, and confirm that the image frame after the intra-frame prediction processing is a second image frame;
the encapsulation module 54 is configured to encapsulate each second image frame into a high-definition video again, and transmit the high-definition video in a low-code-stream manner.
As shown in fig. 6, the macroblock module 52 includes a setting unit 61, a blocking unit 62, and a first confirmation unit 63.
The setting unit 61 is configured to set a specific parameter corresponding to a macroblock according to a compression target of the low code stream, so as to obtain a first macroblock;
the block unit 62 is configured to perform block processing on the original video image through the first macro block;
the first confirming unit 63 is configured to confirm that the image frame after the blocking processing is the first image frame.
As shown in fig. 7, the prediction module 53 includes an analysis unit 71, a matching unit 72, and a second confirmation unit 73.
The analysis unit 71 is configured to analyze image characteristics of each macroblock of the image frame after the blocking processing;
the matching unit 72 is configured to perform intra-frame prediction processing by using a matched prediction mode according to image characteristics of different macro blocks to achieve a higher image compression rate;
the second confirming unit 73 is configured to confirm that the image frame after the intra prediction processing is the second image frame.
As shown in fig. 8, the encapsulation module 54 includes a generation unit 81.
The generating unit 81 is configured to regenerate the high-definition video from each second image frame according to the shooting sequence, and transmit the high-definition video in a low-code-stream manner.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A high-definition video transmission method based on low code stream is characterized by comprising the following steps:
acquiring an image frame in a shot original video;
carrying out blocking processing on an original video image in a preset macro block mode, and confirming that the image frame subjected to the blocking processing is a first image frame;
performing intra-frame prediction processing on the first image frame, and confirming that the image frame subjected to the intra-frame prediction processing is a second image frame;
and repackaging each second image frame into a high-definition video, and transmitting the high-definition video in a low-code-stream mode.
2. The method of claim 1, wherein said obtaining image frames in the captured original video comprises:
the number of the original video pictures is a positive integer greater than three;
the shot original video is a high-definition video.
3. The method of claim 1, wherein the blocking the original video image by a predetermined macro block method comprises:
setting specific parameters corresponding to the macro block according to a compression target of the low code stream to obtain a first macro block;
carrying out block processing on an original video image through the first macro block;
and confirming that the image frame subjected to the blocking processing is a first image frame.
4. The method of claim 1, wherein said intra-prediction processing of the first image frame comprises:
analyzing the image characteristics of each macro block of the image frame after the image frame is subjected to blocking processing;
aiming at the image characteristics of different macro blocks, the matched prediction mode is adopted to carry out intra-frame prediction processing so as to achieve higher image compression rate;
and confirming that the image frame subjected to the intra-frame prediction processing is a second image frame.
5. The method of claim 1, wherein said regenerating each second image frame into high definition video, transmitting said high definition video in a low-stream manner, comprises:
and repackaging each second image frame into a high-definition video according to the shooting sequence, and transmitting the high-definition video in a low-code-stream mode.
6. A high definition video transmission system based on low code stream, characterized by comprising:
the acquisition module is used for acquiring image frames in the shot original video;
the macro block module is used for carrying out blocking processing on an original video image in a preset macro block mode and confirming that the image frame subjected to the blocking processing is a first image frame;
the prediction module is used for carrying out intra-frame prediction processing on the first image frame and confirming that the image frame subjected to the intra-frame prediction processing is a second image frame;
and the packaging module is used for repackaging each second image frame into a high-definition video and transmitting the high-definition video in a low-code-stream mode.
7. The system of claim 6, wherein said macroblock module comprises:
the setting unit is used for setting the corresponding specific parameters of the macro block according to the compression target of the low code stream to obtain a first macro block;
the block unit is used for carrying out block processing on the original video image through the first macro block;
and the first confirming unit is used for confirming the image frame subjected to the blocking processing as a first image frame.
8. The system of claim 6, wherein the prediction module comprises:
the analysis unit is used for analyzing the image characteristics of each macro block of the image frame after the image frame is subjected to blocking processing;
the matching unit is used for carrying out intra-frame prediction processing by adopting a matched prediction mode aiming at the image characteristics of different macro blocks so as to achieve higher image compression rate;
and the second confirming unit is used for confirming the image frame subjected to the intra-frame prediction processing as a second image frame.
9. The system of claim 6, wherein the encapsulation module comprises:
and the generating unit is used for regenerating the high-definition video from each second image frame according to the shooting sequence and transmitting the high-definition video in a low-code-stream mode.
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