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Efficient and robust wireless video delivery is an enabling technology for various applications. The existing wireless video transmission scheme has the cliff effect and it cann't gracefully adapt to channel variations. In this paper, we introduce a pseudo-analog wireless video transmission improvements and design in the hardware. Comparing with the traditional transmission, the linear processing...
It has been developed a method for through selective processing of aerial photographs in order to improve the of video information security containing data on critical infrastructure objects for a given quality of interpretation. A comparative evaluation of the developed and known methods of processing video information is carried out.
This paper presents an efficient codec which is based on an optimal spline wavelet transform and an improved Set Partitioning in Hierarchical Trees algorithm. A comparative study of the proposed codec with the existing works using the polynomial spline based transform and the biorthogonal B9/7 which is frequently used in image compression is done. Peak signal-to-noise ratio (PSNR), structural similarity...
In video coding, quality evaluation is important for improving the coding efficiency. Usually Peak Signal-to-Noise Ratio (PSNR) is utilized to measure the performance of different coding techniques. During the video coding process in YCbCr color space, there are three PSNRs, one for each color component. Sometimes they may contradict to each other, which poses a problem for evaluating the coding performance...
Omnidirectional video encoding and delivery are rapidly evolving fields, where choosing an efficient representation for storage and transmission of pixel data is critical. Given that there are a number of projections (pixel representations), a projection independent measure is needed to evaluate the merits of different options. We present a technique to evaluate projection quality by rendering virtual...
H.264 advanced video coding (AVC) is prolonged to scalable video coding (SVC) for all categories of network transmission. Due to the adoption of exhaustive full search method, SVC computational complexity (CC) has increased when compared to AVC. To reduce the computational complexity, various fast mode decision (FMD) algorithms have been developed. In FMD algorithms, the selection of mode in macro...
In this article deals with estimating and analysis capacity of the closed video channel in the case of applying the method for processing video data based on standardized MPEG technology, the method for closing the video based on the series circuit (compression followed by encryption), the method to hide all the video after the DCT blocks of the base of the video frame, the method based on the selection...
In this paper, we present a depth map rate control algorithm for the High Efficiency Video Coding (HEVC) Multi-View Video plus Depth (MVD) representation. The proposed algorithm is based on a bit allocation refinement technique for key frames together with a depth-map inspired R-λ model coupled with an adaptive clipping algorithm designed to exploit the depth map characteristics. This results in improved...
The paper uses EMD to construct a new transformation matrix to improve the original matrix coding algorithm and proposes a new video steganography algorithm:Improved Matrix Encoding (IME). The proposed algorithmretains the advantages of EMD and matrix encoding that it can greatly reduce the modifications of embed carrier to achieve a high embedding efficiency under the conditions of same embedding...
Data transmission through the internet is popular in contemporary world. What is of utmost importance is secrecy as well as data privacy in the communication channels of the internet. Steganography consists of by far the best techniques for data hiding and ensuring secrecy. This paper focuses on audio steganography, where a message audio file is embedded within another cover audio file.
This paper describes a steganography technique in which text is concealed in an image. The lower nibble of each image byte is modified so as to contain each nibble of the input text. The steganography algorithm used in this implementation maximises on data capacity and also ensures security. The Java programming language is used for its comprehensive libraries and ease of use. A simple GUI has been...
Nowadays, there are many kinds of technologies to provide multimedia TV content in different formats and picture quality. Three-dimensional (3D) video is one of the next generation TV services with specific features from the video image quality point of view. Naturally, efficient compression tools enabling significant bit rate reduction to ease 3D video distribution are an integral part of any practical...
Our objective of this paper is to frame an efficient method based on wavelet so that sparsity and multi-resonate structure of wavelet properties can be used for Image Denosing. So fulfilling the objective to make an efficient Image Denoising technique we have proposed an Image denoising technique which is based on squared error-Stein's unbiased risk estimate linear expansion of thresholds (SURE-LET)...
High Efficiency Video Coding (HEVC) is an ongoing standard, which is an extension of H.264/AVC which is the latest coding standard. In HEVC encoder an exhaustive search method is employed to select the best mode for each macro block which consumes more encoding time. Rate and Distortion tradeoff attained for encoding each macroblock introduces more computation complexity. Although, HEVC has better...
This papers deals with an efficient image compression technique for images having low dynamic range. The images with low dynamic range generally have low intensity variations. By considering this fundamental characteristic into account we can go for image compression at higher ratio with small modifications to the existing block based EZW algorithm. To achieve the improvement in compression ratio,...
This papers deals with improved image compression technique for images having low dynamic range. It is a well known fact that the dynamic range of the images having low intensity variations is less. So by considering this fundamental characteristic into account we can go for image compression at higher ratio with small modifications to the existing algorithms. To achieve the higher compression ratio,...
This paper presents a search window selection approach that can reduce the computational complexity of motion estimation in HEVC systems. In this scheme, the size of the search window is decided only based on the Motion Vector Predictor (MVP) of the Largest Coding Unit and is inherently adaptive to the characteristic of the video content. The experimental results show that the average accessed pixel...
The cubic phase mask is known to cause significant changes of point spread function (PSF) as the angle of view increases. view. Instead of the conventional on-axis PSF in the best focal plane, we utilized the arithmetic-average of PSFs at various angles of view to generate the deconvolution filter for wavefront coding, and confirmed that the effective angle of view was successfully expanded about...
In the last few years, online video services have experienced great development. When we watching videos, we all want to get better watching experiences, but the delivery of the videos are restricted by Internet bandwidth. In order to get better video quality with limited Internet environment, people have formulated a lot of compression standards to make the size of video files smaller. But during...
This paper introduces a video codec evaluation system. The system can evaluate the performance of video codec by changing encoding parameters from different dimensions: video content, resolution, codec preset, and bitrate. For each encoder, the system can enumerate all kinds of parameters above to encode test video sequences and then record codec's output video quality and time-consumption. Through...
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