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.
Three main roots devalue the performance of the multicore video decoder: data dependency, imbalanced workload, and resource contention. This paper strategically employs one frame partition and group of macroblock row (GMR) partitions, with different GMR sizes, for a dual core MPEG-2 decoder to reduce or remove the effect of data dependency and also to analyze how much deterioration those roots cause...
Digital Audio and Video Broadcasting (DAB/DVB) has massive potential for the development of passive bistatic radar. The Digital broadcasting signal had been proved as a good ‘illuminator of opportunity’ for passive coherent location (PCL) radar systems. Digital terrestrial multimedia broadcasting (DTMB) was announced as the Chinese DTV standard in August, 2006. This paper presents a method for reception,...
This paper proposes a new method for multiplexing — demultiplexing of AVS video and AAC audio stream that uses frame numbers as time stamps for achieving lip synchronization during playback. The packetization layers adopted for multiplexing the video and audio streams before their transmission conform to the MPEG-2 systems framework.
In this paper, an efficient multiplexing/demultiplexing scheme while achieving lip synchronization after decoding and playback of video and audio is presented. This has been achieved using MPEG-2 transport streams. Dirac video and AAC audio codecs have been used for compression.
This paper presents the 10 Gb/s Ethernet Phy Forward Error Correction (FEC) sub-layer novel VLSI structure with the following 2 ideas: one is the frame boundary detecting methodology and the other is the fast frame synchronous structure. The first method increases the frame synchronizing speed by fully optimizing the candidate start position shift algorithm to accelerate the frame synchronization...
A comma detection and word alignment circuit is proposed for a 6.25-Gb/s SerDes. In order to achieve a high speed, a new architecture of combined parallel and pipelined is employed. Based on the proposed structure, a high speed comma detector is implemented using 0.18im CMOS technology. Post simulation result indicates that the circuit can operates up to 770MHz with a power consumption of 10.8 mW...
As general international standard, Inter-Range Instrumentation Group (IRIG) time codes were widely used in modern digital world, monitor and measurement system, autocontrol and commercial fields etc. A new design of IRIG-B decode based on Field Programmable Gate Array (FPGA) is proposed in this paper. The results demonstrate that the system runs steadily with high synchronization precision and better...
Permutation codes are M-ary codes which can be used, in combination with M-ary FSK, to correct errors in Power Line Communications (PLC). It has been shown in [1] that permutation code trees can be used to correct a single substitution or synchronization error per codeword, without the use of markers. In this paper, we show that, due to the structure of the permutation code tree, adjacent errors can...
An infrared remote controlled code lock system that adopts the special infrared remote control encoder and the software decoding technique is designed to solve the problem of the complication of management and the easiness of arbitrary change, for the management of industrial machine parameters. This article presents the idea of the principle of hardware and the decoding of software. The infrared...
Inter carrier interference (ICI) is deemed as a critical issue in orthogonal frequency division multiple access (OFDMA) systems. Though ICI caused by Doppler spread is negligible in femtocell systems, frequent reception of signals over misaligned subcarriers will introduce severe ICI. Successive interference cancellation and decision feedback equalizers are some of the techniques proposed to mitigate...
In the last years, there has been an increasing interest in using Brain Computer Interfaces (BCI) within motor rehabilitation therapies that use robotic devices or functional electro stimulation to help or guide the efforts of the patient to move her body. A crucial step of these therapies is to provide help to the user just when she is actually trying to accomplish a certain motion or task One of...
The wireless mesh networks traffic is of self-similarity and the network performance is degraded by self-similar traffic. Network coding is a new technology which improves networks performance. In this paper, an algorithm was presented that used network coding to reduce the queue length and the delay time when self-similar traffic was occurred. The algorithm was based on synchronization after data...
Merging unit (MU) is an important intelligent electronic device (IED) in digital substation and becomes research emphasis. The function of an MU is to collect multichannel digital signals output by electronic current transformers (ECT) and electronic voltage transformers (EVT) synchronously, and transmit these signals with the protocol of IEC61850 to protective devices and measure-control devices...
The paper describes a Field Programmable Gate Array (FPGA)-based lossless data compression coprocessor using implementing a compression method developed by Rice. We have implemented the Rice code (both encoder and decoder) for 8 bit/sample data on an FPGA Xilinx XC4005. The code has been designed to be optimal on 1.5 < H < 7.5 bits/sample, that is usually required in lossless image...
in order to achieve the reliable decoding when the real-time video compression bit streams are transmitted in radio channel, the effective channel code method is given. It is based on the Turbo product codes with AHA4501. The performance of its delay time and error correction is evaluated. The selection of block size, the iteration number and frame sync header and is described. And the method has...
A number of methods have been proposed for synchronizing chaotic systems. The most widely used methods are continuous synchronization schemes. In a continuous synchronization scheme, chaotic systems are coupled to each other continuously such that synchronization errors converge to zero. In this paper, chaos synchronization in coupled discrete-time dynamical systems is presented. Simulation results...
A pseudo segmented twofold time-interleaved 6-bit digital-to-analog converter (DAC) occupies 0.28 mm2 chip area in a standard 90 nm CMOS technology. The DAC enables sampling rates up to 28 GS/s with a power consumption of 2.25 W at a −2.5 V power supply. The output bandwidth is at least 14 GHz. The integral non-linearity (INL) and the differential non-linearity (DNL) are 0.8 LSB and 1 LSB respectively...
For communications and networking channels, coding techniques are widely used to correct errors in corrupted messages. The “Quality of Protection” (QoP) that can be provided via error correction directly affects the “Quality of Service” (QoS) experienced by users. The errors are commonly assumed to be substitution or erasure errors. Such systems rely on perfect synchronization so that no bit is deleted...
In this paper, the influence of imperfect carrier phase synchronization on the performance of turbo-coded system is analyzed and a novel method called Logarithm-A-Posteriori-Probability-Ratios (LAPPRs)-statistic-decision-aided for carrier phase synchronization and decoding is proposed. The bits satisfying the criterion presented in this paper are chosen iteratively for Data-Aided estimation and phase...
Frame Synchronization (FS) is required in several communication standards in order to recover the individual frames that have been aggregated in a burst. This paper proposes a low-delay and reduced-complexity Sliding Trellis (ST)-based FS technique, compared to our previously proposed trellis-based FS method. Each burst is divided into overlapping windows in which FS is performed. Useful information...
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.