Performance evaluation of speech quality for VOIP on the internet

... Characteristics & performance evaluation of selected Mutual Funds in India 9th Indian Institute of Capital Market Conference [4] Michael, C J (1967) The Performance of Mutual Funds in the period ... during the study period OBJECTIVES OF THE STUDY: To evaluate and compare the performance of equity diversified mutual fund schemes of selected companies To compare the performance of equity diversified ... (Sigma) on selected schemes of selected companies Risk on selected schemes HDFC HDFC Capital Builder Fund HDFC Core & Satellite Fund HDFC Equity Fund HDFC Long Term Equity Fund HDFC Top 200 Fund...

... that the protection of the sui generis right concerns only acts of extraction and re-utilisation as defined in Article 7(2) of the directive That protection does not, on the other hand, cover consultation ... to the ECJ23 on the basis of the conflicting judgments elsewhere 4.1.3 The opinion of stakeholders 75% of respondents to the Commission services' on- line survey are aware of the existence of the ... evaluation is to assess whether the policy goals of Directive 96/9/EC on the legal protection of databases1 (the Directive ) have been achieved and, in particular, whether the creation of a special...

... an open-loop MIMO OFDM-CDMA scheme using space-timefrequency spreading (STFS), in the presence of frequency-selective Rayleigh-fading channel The BER and BLER performance of the OFDM-CDMA system ... scheduling In addition, it offers better diversity/multiplexing trade-off The performance of MIMO OFDM–CDMA scheme using STFdomain spreading is investigated with zero-forcing (ZF) receiver It is ... section, joint space-time-frequency spreading is proposed for the downlink of an openloop multi-user system employing single-user MIMO (SU -MIMO) system based on OFDMCDMA system A MIMO OFDM channel...

... Recursive analytical performance evaluation of broadcast protocols with silencing: application to VANETs Stefano Busanelli∗ , Gianluigi Ferrari and Roberto Gruppini Department of Information ... performance of the novel probabilistic broadcast protocols is investigated and compared with that of other (known) protocols Finally, Section concludes the article 2.1 Multihop broadcast protocols ... a function of ρs z, in Figure 8a, and the following considerations can be drawn: (i) g ∗ is an increasing monotonic function of ρs z; (ii) with the exception of the region in proximity to ρs z...

... N c , the OFDM-CDMA 60 Proposed OFDM-CDMA 2D OFDM-CDMA Number of Users 50 40 30 20 10 0 10 12 14 16 SNR dB Figure 10 System throughput comparison for OFDM-CDMA system with 4Tx, 4Rx of the proposed ... scheduling In addition, it offers better diversity/multiplexing trade-off The performance of MIMO OFDM-CDMA scheme using STF-domain spreading is investigated with zero-forcing (ZF) receiver It ... doi:10.1186/1687-6180-2011-139 Cite this article as: Dahman and Shayan: Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems EURASIP Journal on Advances in Signal Processing...

... with attack and release time constants τraise and τdecay The differences between the maxima and minima are calculated to obtain the current dynamic range of the signal (4) The decision for a speech ... vectors containing speech samples will be added to the noise data matrix in (5), which leads to cancellation of parts of the speech signal On the other hand, if too many actual noise samples are detected ... stationary directional noise and nonstationary diffuse noise The nonstationary noise is derived from recordings in a restaurant to approach a real world situation Section provides a discussion of...

... enable the calculation of the cost of a path, based on the LQI values of all links Therefore, we chose to evaluate the performance of these LQI-based routing metrics for NST-AODV Note that the PATH-DR ... data transmission rate for each node to allow for a link quality estimation [5] 4.5 MultiHopLQI One of the first attempts at a link quality estimator for a routing protocol based on the LQI was ... for the nature of NST-AODV (i.e., they not require transmission of additional control messages); and (iii) they take into account the qualities of all the links of a path in the computation of...

... REGISTRATION MSE = 3.2 SUPER-RESOLUTION FUSION/DEBLURRING METHODS This section briefly describes the different SR reconstruction methods used in the performance evaluation The first three methods ... the performance on real-world data of the SR reconstruction methods with simulations, some measurements are needed of the real-world data: (1) SNR, (2) point-spreadfunction (PSF) of the lens, and ... the SR reconstruction methods To measure the performance of each method, the same setup is used as in “simulated data experiment 1” (see Figure 6) The performance of the SR reconstruction methods...

... can be used to obtain simple-toevaluate approximate rational expressions for the MGF of the Weibull RV based on the knowledge of its moments We then use these expressions to evaluate the performance ... Section 2, we give a brief overview of the Pad´ approximation teche nique In Section 3, we apply this technique to the problem at hand The performance of digital modulation systems over the Weibull ... [Nq −1/Nq ] (s, m, γ) PERFORMANCE OF DIGITAL MODULATIONS OVER THE WEIBULL FADING CHANNEL In [7], based on the obtained closed-form expression for the Weibull MGF, and using the MGF approach [22],...

... effectiveness of the active network for localization, in the following we evaluate the limiting performance of a localization technique based on the RF map of the area Performance is expressed in terms of ... interrogator CONCLUSIONS We analyzed the performance of networks used for localization in terms of the probability of localization error Solutions based on active and passive devices were considered A ... the performances of the considered active and passive localization techniques, we introduce the probability of localization error P p as a function of the number/density of devices used for localization...

... quality of VoIP applications In the following sections, we will introduce the speech quality evaluation methods used to measure the quality of VoIP applications 2.4.1 Subjective Speech Quality ... system on PlanetLab and conducted a set of experiments for speech quality evaluations • Second, we studied the characteristics of the Speex and SILK codecs We compared the performance of two ... tools for measuring the subjective ideal of individual preferences for the speech environment, while on the other hand it can provide a much more reliable and actual evaluation for the speech quality...