Video Image Transmission Research Articles

ANALYSIS OF VIDEO DATA COMPRESSION ALGORITHMS AND OPTIMIZED FOR USE IN REMOTELY CONTROLLED DRONES

Due to the widespread use of unmanned aerial vehicles (UAVs) in the civil sphere, there is a need to improve the video image generation quality and transmission technologies, changing the video streams coding to reduce their size and improve quality. Video streaming technologies are moving further towards complicating the video transmission systems used, which helps improve the received video data quality. Higher of transmitted video signal quality – more requirements for frequency band increase used. This fact leads us to use effective video compression algorithms that allow us to combine high image quality with a narrow bandwidth of frequencies used. In this paper, currently existing coding algorithms, their efficiency and computational complexity are studied. Among the algorithms under consideration there will only be those whose effectiveness has been proven by finding their application in modern realities. Based on the research, conclusions will be drawn regarding the feasibility of using each encoding algorithm for transmitting video data in real time.

Simulation of Video Image Fault Tolerant Coding Transmission in Digital Multimedia

In order to effectively improve the quality of video image transmission, this paper proposes a method of digital multimedia video image coding. The transmission of digital multimedia video image fault-tolerant coding requires sparse decomposition of a digital multimedia video image to obtain the linear form of the image and complete the transmission of video image fault-tolerant coding. The traditional method of fault-tolerant coding is based on human visual characteristics but ignores the linear form of the digital multimedia video image, which leads to the unsatisfactory effect of coding and transmission. In this paper, a fault-tolerant coding method based on wavelet transform and vector quantization is proposed to decompose and reconstruct digital multimedia video images. The smoothness of wavelet transform can remove visual redundancy; the decomposed image is vector quantized. The mean square deviation method and the similar scalar optimal quantization method are used to select and calculate the image vector, construct the over complete database of a digital multimedia video image, and normalize it; the digital multimedia video image is thinly decomposed by asymmetric atoms, and a linear representation of the image is obtained. According to the above-given operations, we can master the distribution range and law of pixels and realize fault-tolerant coding. The experimental results show that when the number of iterations is 15, the CR index is the same, PSNR increases by 8.7%, coding is 23.7% faster and decoding is 15% faster. Conclusion. The proposed method can not only improve the speed of fault-tolerant coding but also improve the quality of video image transmission.

Animation Design Based on 3D Visual Communication Technology

The depth synthesis of image texture is neglected in the current image visual communication technology, which leads to the poor visual effect. Therefore, the design method of film and TV animation based on 3D visual communication technology is proposed. Collect film and television animation videos through 3D visual communication content production, server processing, and client processing. Through stitching, projection mapping, and animation video image frame texture synthesis, 3D vision conveys animation video image projection. In order to ensure the continuous variation of scaling factors between adjacent triangles of animation and video images, the scaling factor field is constructed. Deep learning is used to extract the deep features and to reconstruct the multiframe animated and animated video images based on visual communication. Based on this, the frame feature of video image under gray projection is identified and extracted, and the animation design based on 3D visual communication technology is completed. Experimental results show that the proposed method can enhance the visual transmission of animation video images significantly and can achieve high-precision reconstruction of video images in a short time.

Current Applications of Remote Robot-Assisted Cardiac Ultrasound Examination: A Systematic Review of Clinical Use and Technological limitations

The use of robot-assisted ultrasound systems (RAUS) has the potential to overcome the lack of access to care in remote locations. This review aims to systematically gather, compare, and discuss the current state-of-the-art of RAUS. A systematic search was performed in Embase, PubMed, MEDLINE and Scopus in March 2021. We analysed the robot type, communication link between master and slave, control distances, visual interface, and type of feedback control. 2,997 articles were screened, with 25 articles included for review. The articles identified were clinical (n=10) or preclinical studies (n=15). Of the clinical studies, 40% were cardiovascular. The cardiac RAUS included 113 participants who showed similar findings to traditional ultrasound, although limitations with valvular assessments exist. A lack of control of the ultrasound settings at the master site was prevalent. The majority of the studies required assistants to adjust settings following verbal instructions (increasing examination time). Image Quality: Errors primarily arose from image resolution, highlighting the importance of image quality. Low bandwidth links could be used to control a robot; however, higher bandwidth is required for video and ultrasound image transmission. Feedback. Visual (56%) and a combination of visual and force (36%) were the most prevalent feedback systems. Force-feedback allowed smoother robot control and made sonographers aware of the pressure applied to the patient’s skin. The combination of robotics, AI, and telecommunications can further revolutionise the use of medical ultrasound in the future. Further developments should focus on the control algorithms, communication system and the front-end interface.

Design of reliable video image transmission system for underwater vehicle

Design of reliable video image transmission system for underwater vehicle

Design of reliable video image transmission system for underwater vehicle

In order to improve the transmission performance of underwater vehicle motion video image, a reliable transmission system of underwater vehicle motion video image is designed. The hardware part of the system includes the design of the transmission server and the design of the transmission client; the software part of the system mainly includes two parts: compression processing and lossless transmission of the motion video image of the underwater vehicle, which completes the software design of the system and realises the design of the whole system. The test results show that the proposed transmission system has good transmission performance for the motion video image of the vehicle in shallow water.

Створення комп'ютерних засобів керування автономним літальним апаратом з застосуванням дистанційних хмарних обчислень

The possibility of creating a computer control system for an unmanned aerial vehicle using remote cloud computing according to predefined scenarios from the user's desktop is investigated. For this, an experimental setup was created, which includes a quadcopter, a personal computer with the Windows operating system, an on-board computer Raspberry-3 with the Linux operating system, a Pi Camera V2 camcorder, and a Pixhawk autopilot. To model the control and transmission of video images the own control programs and photo pursuit on a computer Raspberry-3 in Python are recorded. Based on the obtained results, a model of unmanned aerial vehicle control from the desktop of the user's personal computer via the on-board computer without the use of a standard control panel and operator is proposed.

A 5G-powered robot-assisted teleultrasound diagnostic system in an intensive care unit

BackgroundTeleultrasound provides an effective solution to problems that arise from limited medical resources, a lack of local expertise, and scenarios where the risk of infection is high. This study aims to explore the feasibility of the application of a 5G-powered robot-assisted teleultrasound diagnostic system in an intensive care unit.MethodsIn this study, the robot-assisted teleultrasound diagnostic system MGIUS-R3 was used. Using 5G network technology, the doctor manipulates the robotic arm to perform teleultrasound examination. The doctor can adjust parameters via the teleultrasound control panel, and real-time transmission of audio, video and ultrasound images can facilitate simultaneous communication between both parties. All patients underwent robot-assisted teleultrasound examination and bedside ultrasound examination of the liver, gallbladder, pancreas, spleen, kidney, as well as assessment for pleural effusion and abdominal effusion. We evaluated the feasibility of the application of the robot-assisted teleultrasound diagnosis system in the intensive care unit in terms of consultation duration, image quality, and safety. We also compared diagnostic consistency and differences.ResultsApart from one patient who was excluded due to severe intestinal gas interference and poor image quality, a total of 32 patients were included in this study. Every patient completed all relevant examinations. Among them, 20 patients were male; 12 were female. The average age of the patients was 61 ± 20 years. The average duration of teleultrasound diagnosis was 17 ± 7 min. Of the 32 patients, 26 had positive results, 6 had negative results, and 5 had inconsistent diagnoses. The overall diagnostic results were basically the same, and there were no differences in diagnostic levels between the two. The overall average image quality score was 4.73 points, which represented a high-quality image. After robot-assisted teleultrasound examination, no significant changes were observed in the vital signs of patients as compared to before examination, and no examination-related complications were found.ConclusionThe 5G-powered robot-assisted teleultrasound diagnostic system was associated with the benefits of clear images, simple operation, relatively high levels of consistency in terms of diagnostic results, higher levels of safety, and has considerable application value in the intensive care unit.

AES Encrypted Real-Time Video Stream and Image Transmission from ESP32-CAM

AES Encrypted Real-Time Video Stream and Image Transmission from ESP32-CAM

Low bit rate underwater video image compression and coding method based on wavelet decomposition

In view of the limited bandwidth of underwater video image transmission, a low bit rate underwater video compression coding method is proposed. Based on the preprocessing process of wavelet transform and coefficient down-sampling, the visual redundancy of underwater image is removed and the computational coefficients and coding bits are reduced. At the same time, combined with multi-level wavelet decomposition, inter frame motion compensation, entropy coding and other methods, according to the characteristics of different types of frame image data, reduce the number of calculations and improve the coding efficiency. The experimental results show that the reconstructed image quality can meet the visual requirements, and the average compression ratio of underwater video can meet the requirements of underwater acoustic channel transmission rate.

Application of SVGA video real-time transmission technology in music education information communication

The current music education information has certain information loss in the real-time transmission process, which leads to poor educational effect. The research content of this thesis is based on FPGA video image acquisition and processing system. At the same time, this research mainly uses FPGA as the platform to realize and simulate video acquisition, transformation, storage, display and transmission. This research solves the problem of long-distance real-time transmission of high-definition video stream, and in order to improve the subjective quality of the recovered video at the receiving end, the algorithm processing is added to reduce the blockiness phenomenon in the video displayed at the receiving end. Finally, the validation test was designed to validate the research perspective. The experimental results show that the system works stably and realizes the functions of video image acquisition, conversion, display and transmission, and achieves the design goal. However, due to time constraints and other conditions, the entire design needs further improvement, so that it can provide a basis for the development of subsequent music education information communication technology.

The Experience of Using Video Support in Ambulance Care: An Interview Study with Physicians in the Role of Regional Medical Support.

Background: In order to facilitate more effective patient assessment and diagnostic support by improving the flow of information between ambulance nurses (AN) and physicians in the role of regional medical support (RMS), an application was developed for transmitting real-time video images. Objective: The objective of this study was to elucidate the physicians’ experiences using a video application to support the assessment and triage procedure in ambulance care, when patients are deemed to not have an urgent need for emergency care. Design: The design for this research was a qualitative interview study. Ten physicians, working as RMS in ambulance care, were purposively selected to participate. The telemedicine concept studied consisted of a real-time video image application, in addition to the currently used mobile phone. When a patient was deemed eligible for inclusion in the study, the ambulance nurse (AN) contacted the RMS via telephone to initiate a video consultation. To elucidate the RMS experience of using the application, a conventional content analysis was performed. Results: The main theme “a feeling of being satisfied through a sense of increased patient safety” emerged from the following two categories: adds value in diagnosing situations (three subcategories, i.e., support in diagnosing, usability, and technical weakness) and increase communication opportunities (four subcategories, i.e., assessing the level of care, patient dialogue, professional communication, and team learning). Conclusions: Physicians in the role of RMS experienced a positive impact using video image transmission in addition to the currently used mobile phone. This evaluation was derived from a sense of increased patient safety in the assessment situation when patients were considered to be triaged to self-care.

Non-Standard Video Protocol Transmission System Design Based on the Camera Link Interface of FPGA

With the rapid development of video communication technology, video transmission is becoming more and more important. However, in the process of video transmission, the reliability and real-time performance of transmission data is the premise of video high-speed transmission, So In order to improve the real-time video image transmission, validity, reliability, and design a Camera Link interface based on FPGA of non-standard video protocol transmission system, the system front-end by simulating the Camera to complete the video image collection, through the video format conversion chip output standard video protocol data, and uses FPGA to complete the processing of video data, complete the video image with Camera Link interface of high speed transmission, finally realizes the real-time video transmission, but also improve the reliability and effectiveness of the video image.

Real-Time Video Transmission of Visible Light Communication Based on LED

In order to realize the video image transmission and the excellent lighting function of the visible light communication system, a LED-based visible light communication method and system is proposed. Based on the field programmable gate array (FPGA) hardware, the RS channel coding is applied to the visible light communication system. A pulse position decision algorithm is proposed, which is applied to the receiver of the visible light communication system to meet the error-free decision of the signal. The design of the system is based on the analog-to-digital conversion circuit, which provides a large signal dynamic range for the pulse position decision algorithm, and designs the LED driver based on the bias circuit to realize the fast broadband modulation of the signal. The test results show that the combined application of pulse position decision algorithm and Reed-Solomon codec can reduce the error of system signal and meet the real-time and reliable transmission of signal. The system can display the received video in real time from the receiver, and the whole system communication distance up to 5 m.

Protection of Visual Data Transmission for Vessel Traffic Systems Using Joint Fingerprinting and Decryption Method Based on Modified Hill Cipher

Abstract Vessel traffic systems provide a high level of safety on coastal waters due to coastal radar stations and industrial cameras transmitting information to traffic supervision centers, as well. To improve a vessel traffic services is very important to ensure the speed and secrecy for the transmission of video images. The paper presents the basic issues of the multimedia data protection by digital watermarking and fingerprinting methods. Main applications for such digital marking were described in the paper as well as its requirements. Furthermore, the importance of multicast transmission for fingerprinting methods was presented by comparing the scalability of methods using only unicast transmissions and methods using multicast transmissions. The paper also presents the greatest threat to fingerprinting methods, which are attacks performed by more than one pirate. These attacks are called collusion attacks. The criteria that should be followed during identifying rogue users taking part in the collusion attack on the security systems has been presented. The paper also contains description of the extended Hillcast method, which belongs to the group of JFD (Joint Fingerprinting and Decryption) methods. The method provides a cryptographic security and digital fingerprinting of multimedia content, while maintaining high scalability. Main purpose of this method is VoD (Video on Demand) service, but it can also be used in vessel traffic supervision systems, such as VTS and AIS. In the last part of paper, there are results of studies which indicate high resistance to most common collusion attacks. Method proposed by authors can enhance the security of visual data transmission in vessel traffic systems.

Design of the Video Image Acquisition System Based on ADSP-BF561

This Article design a video image acquisition system implementations which is based on ADI Corporation Blackfin561 DSP , using OV7660 CMOS image sensor for the video input source and advanced JPEG2000 image compression algorithm under the operate system of the uClinux. It achieves a video image acquisition, processing and transmission. Test results show that the PC side you can see clearer images.

Design of Live Video Monitoring System Based on DM642

This paper adopts high-speed fixed-point signal processor TMS320DM64 produced by TI company, XC2S150 chip FPGA produced by Xilinx company, video front-end decoder chip SAA7111 and back-end encoding chip AL250 new launched by PHILIP company, which constituted a high-speed, intelligent live video monitoring system. The system video image transmission of strong real-time, high efficiency and good transmission quality can meet the requirements of many video image processing and transmission field application in current, and has a good application prospect. The design of system software and hardware that introduced in this paper is the key.

Significance of telemedicine for video image transmission of endoscopic retrograde cholangiopancreatography and endoscopic ultrasonography procedures

With the rapid and marked progress in gastrointestinal endoscopy, the education of doctors in many new diagnostic and therapeutic procedures is of increasing importance. Telecommunications (telemedicine) is very useful and cost-effective for doctors' continuing exposure to advanced skills, including those needed for hepato-pancreato-biliary diseases. Nevertheless, telemedicine in endoscopy has not yet gained much popularity. We have successfully established a new system which solves the problems of conventional ones, namely poor streaming images and the need for special expensive teleconferencing equipment. The digital video transport system, free software that transforms digital video signals directly into Internet Protocol without any analog conversion, was installed on a personal computer using a network with as much as 30 Mbps per channel, thereby providing more than 200 times greater information volume than the conventional system. Kyushu University Hospital in Japan was linked internationally to worldwide academic networks, using security software to protect patients' privacy. Of the 188 telecommunications link-ups involving 108 institutions in 23 countries performed between February 2003 and August 2009, 55 events were endoscopy-related, 19 were live demonstrations, and 36 were gastrointestinal teleconferences with interactive discussions. The frame rate of the transmitted pictures was 30/s, thus preserving smooth high-quality streaming. This paper documents the first time that an advanced tele-endoscopy system has been established over such a wide area using academic high-volume networks, funded by the various governments, and which is now available all over the world. The benefits of a network dedicated to research and education have barely been recognized in the medical community. We believe our cutting-edge system will be a milestone in endoscopy and will improve the quality of gastrointestinal education, especially with respect to endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic ultrasonography (EUS) procedures.

All-optical video-image encryption with enforced security level using independent component analysis

In the last two decades, wireless communications have been introduced in various applications. However, the transmitted data can be, at any moment, intercepted by non-authorized people. That could explain why data encryption and secure transmission have gained enormous popularity. In order to secure data transmission, we should pay attention to two aspects: transmission rate and encryption security level. In this paper, we address these two aspects by proposing a new video-image transmission scheme. This new system consists in using the advantage of optical high transmission rate and some powerful signal processing tools to secure the transmitted data. The main idea of our approach is to secure transmitted information at two levels: at the classical level by using an adaptation of standard optical techniques and at a second level (spatial diversity) by using independent transmitters. In the second level, a hacker would need to intercept not only one channel but all of them in order to retrieve information. At the receiver, we can easily apply ICA algorithms to decrypt the received signals and retrieve information.

Stereoscopic video images for telerobotic applications

AbstractThis article addresses the use of stereoscopic images in teleoperated tasks. Depth perception is a key point in the ability to skillfully manipulate in remote environments. Displaying three‐dimensional images is a complex process but it is possible to design a teleoperation interface that displays stereoscopic images to assist in manipulation tasks. The appropriate interface for image viewing must be chosen and the stereoscopic video cameras must be calibrated so that the image disparity is natural for the observer. Attention is given to the calculation of stereoscopic image disparity, and suggestions are made as to the limits within which adequate stereoscopic image perception takes place. The authors have designed equipment for image visualization in teleoperated systems. These devices are described and their performance evaluated. Finally, an architecture for the transmission of stereoscopic video images via network is proposed, which in the future will substitute for current image processing devices. © 2005 Wiley Periodicals, Inc.