The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The JPEG committee (formally, ISO SC29 WG1) is currently standardizing a lightweight mezzanine codec for video over IP transport under the name JPEG XS. A particular challenging design constraint of this codec is multi-generation robustness, that is the necessity to minimize the error built-up under multiple re-compression cycles. In this paper, we discuss the sources of such errors, how they are...
Polar coding is a low-complexity method for communication over noisy classical channels, which is capable of providing highly reliable data transmission. This paper proposes an enhanced polar codec scheme for mission critical applications in train-to-ground wireless communications. Firstly, we develop an enhanced polar coding scheme to support reliable data transmission under time-varying channel...
An efficient numeral-based coding mechanism, called SDT-free is proposed in this paper that avoids crosstalk faults. The SDT-free coding mechanism completely removes bit patterns ‘11111’ and ‘00000’ which impose the worst crosstalk effects considering inductance effects. In this way, the coding mechanism improves the reliability of chip channels and offers invariant delay for channels. To minimize...
Coding of signals with high amount of dense transient events, like applause, rain drops, etc., is usually a difficult task for perceptual audio coders. Especially at low bit rates, coding (and the associated coding noise) leads to smeared transients and a perceived increase in noise-like signal character. We propose a post-processing technique for coded/decoded applause-like signals which is based...
In this paper we introduce and evaluate Haar based codec assisted medium and long range data transport structures, e.g., bus segments, Network on Chip interconnects, able to deal with technology scaling related phenomena (e.g., increased susceptibility to proximity coupling noise and transmission delay variability), targeting energy savings at the expense of a reasonably small overhead, i.e., 1 extra...
The WiMAX network in the city of Baghdad is established by “The State Company for Internet Services” (SCIS). SCIS is a subsidiary of the Ministry of Communications (MoC) in Iraq. SCIS is responsible for the installation and operation of WiMAX networks and is also the prime “Wireless Internet service provider” (WISP) in Iraq. This paper presents a simulation model of a WiMAX network for the city of...
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...
This paper presents a structured light stand-alone 3D camera comprised of high speed embedded projector, high frame rate machine vision camera and on-board computer. Hierarchical Orthogonal Coding (HOC) is used for structured light patterns and Boundary Inheritance Codec [3] is used for decoding the HOC patterns. The proposed solution provides highly accurate 3D point cloud with less weight and smaller...
Gaming videos are increasingly being streamed live over the Internet, as evident by the increasing popularity of services such as Twitch.tv and YouTube-Gaming, with Twitch.tv alone consisting of approx. two million streamers and over nine million daily active users. We present here an objective evaluation of eight most popular games encoded using H.264/MPEG-AVC, H.265/MPEG-HEVC and VP9 encoders for...
Encoding and Decoding schemes plays a vital role in networking, storage, data communications and radio or wireless communication systems. The hardware architecture of an encoding and decoding blocks becomes an attractive issue in designing. Very large scale integration (VLSI) is one of the trending process of integrating thousands of transistors together in a chip and its architecture provides better...
At present, the majority of the studies in the area of multizone sound-field reproduction are focused on the decoding of the soundfield. In this work, we propose an approach to encode the multizone sound-field within the desired reproduction region based on higher order Ambisonics (HOA) formats. The B-format signals for the complex multizone soundfield can be derived based on the coefficients of a...
Scalable High efficiency Video Coding (SHVC) is the scalable extension of the latest video coding standard High Efficiency Video Coding (HEVC). One of the key novelties introduced by SHVC is that it enables hybrid codec scalability. This basically means that the video layers can be encoded with different video standards providing backward compatibility between codecs. In this paper, we propose a software...
We have devised a method for estimating, from a single frame of audio frequency spectra, a shape parameter of multivariate generalized Gaussian distribution which has variance represented by an all-pole model and no covariance. Based on powered all-pole spectrum estimation (PAPSE), which is an extension of linear prediction, the proposed method simultaneously estimates the shape parameter and the...
High Resolution Envelope Processing (HREP) is a new tool for improved perceptual coding of audio signals that predominantly consist of many dense transient events, such as applause, rain drop sounds, etc. These signals have traditionally been very difficult to code for perceptual audio codecs, particularly at low bit rates. Based on the gain control principle, HREP acts as a pre-/post-processor pair...
This research proposed a method for adaptive Lagrange multiplier determination for rate-distortion optimization with dynamic texture in High Efficiency Video Coding (HEVC). Inspired by the experimental results of the Lagrange multiplier selection test, the presented approach adaptively predicts the optimum Lagrange multiplier for different dynamic texture sequences, based on the features of the dynamic...
A video analyzer is a comprehensive bitstream analysis tool which accelerates development and debugging of video bitstreams while ensuring compliance with industry standards. There are many conventional analyzers present for different video standards like H.264, HEVC which are compliant only with the respective video sequence format. In this work, a generalized analyzer with integrated encoder is...
This paper investigates the robustness of two state-of-theart action recognition algorithms: a pixel domain approach based on 3D convolutional neural networks (C3D) and a compressed domain approach requiring only partial decoding of the video, based on feature description using motion vectors and Fisher vector encoding (MV-FV). We study the robustness of the two algorithms against: (i) quality variations,...
H.265/High Efficiency Video Coding (HEVC) is the latest next generation video compression standard posterior to H.264/AVC. However, despite its superior coding efficiency to the previous video coding standards, the complexity to implement it is an obstacle to overcome. Especially, combining the separate encoder and decoder has a disadvantage on the aspect of the size and power consumption. To solve...
The contribution of this paper is implementing a high throughput LDPC codec in FPGA for quantum key distribution (QKD) system. By software, the throughput of error correction in QKD system via LDPC codec could only reach 1.8Mbps, which is not satisfactory for high speed QKD systems. Thus, it is desirable that LDPC error correction is realized in FPGA to increase the throughput. LDPC codec is implemented...
We propose an end-to-end approach to describe the energy usage of video delivery within a content delivery framework, and use this to investigate the energy usage behavior of two popular coding schemes, namely, H.264/AVC and H.265/HEVC. Our study based on the proposed model is backed up by measurements of encoding and decoding energy usage of a sample video and shows that, from an end-to-end perspective,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.