scholarly journals Research on a voice changed by distortion

2021 ◽  
Vol 23 (1) ◽  
pp. 188-202
Author(s):  
Kh. Lutsenko ◽  
A. Roman ◽  
S. Grigoryan ◽  
V. Kocharyan
Keyword(s):  
Real Time ◽  
Criminal Law ◽  
Speech Signal ◽  
Linguistic Analysis ◽  
Audio Analysis ◽  
Human Speech ◽  
Computer Tools ◽  
Intentional Change ◽  
Software And Hardware ◽  
Video And Audio

The concept and essence of distortion are considered from a technical stand-point and criminal law perspective. The most common ways of distorting a voice and a speech are provided, as well as certain methods of detecting an intentional change in a voice and human speech by computer tools and linguistic analysis.  Some software and hardware tools changing a speech signal both in real time and in a pre-prepared recording are analyzed. To solve diagnostic and identification tasks, a pressing issue in forensic video and audio analysis is studied which is addressed to forensic experts in this field more often.

A Home Multimedia Control Centers of Improved Design

2011 ◽  
Vol 338 ◽  
pp. 796-799
Author(s):  
Wei Chang Feng
Keyword(s):  
Remote Control ◽  
Real Time ◽  
Multimedia System ◽  
The Internet ◽  
Tv Viewing ◽  
Server Side ◽  
Video And Audio ◽  
The Rich ◽  
Improved Design ◽  
Client Side

E-Yuan multimedia system is developed for the rich audio and video resource on the Internet and on its server side, it can automatically search and integration of network video and audio resources, and send to the client side for the user in real-time broadcast TV viewing, full use of remote control operation, Simply it’s a very easy to use multimedia system. This article introduces its infrastructure, main technical ideas and you can also see some details about server side and client side. At the same time, the improvement on how to collect and integrate video resources is comprehensively elaborated.

scholarly journals Ideal ratio mask estimation using supervised DNN approach for target speech signal enhancement

2021 ◽  
pp. 1-15
Author(s):  
Poovarasan Selvaraj ◽  
E. Chandra
Keyword(s):  
Real Time ◽  
Speech Signal ◽  
Signal To Noise Ratio ◽  
Additive White Gaussian Noise ◽  
Time Delay Estimation ◽  
Variational Model ◽  
Speech Signals ◽  
Frequency Noise ◽  
Intrinsic Mode Functions ◽  
Real Time Applications

The most challenging process in recent Speech Enhancement (SE) systems is to exclude the non-stationary noises and additive white Gaussian noise in real-time applications. Several SE techniques suggested were not successful in real-time scenarios to eliminate noises in the speech signals due to the high utilization of resources. So, a Sliding Window Empirical Mode Decomposition including a Variant of Variational Model Decomposition and Hurst (SWEMD-VVMDH) technique was developed for minimizing the difficulty in real-time applications. But this is the statistical framework that takes a long time for computations. Hence in this article, this SWEMD-VVMDH technique is extended using Deep Neural Network (DNN) that learns the decomposed speech signals via SWEMD-VVMDH efficiently to achieve SE. At first, the noisy speech signals are decomposed into Intrinsic Mode Functions (IMFs) by the SWEMD Hurst (SWEMDH) technique. Then, the Time-Delay Estimation (TDE)-based VVMD was performed on the IMFs to elect the most relevant IMFs according to the Hurst exponent and lessen the low- as well as high-frequency noise elements in the speech signal. For each signal frame, the target features are chosen and fed to the DNN that learns these features to estimate the Ideal Ratio Mask (IRM) in a supervised manner. The abilities of DNN are enhanced for the categories of background noise, and the Signal-to-Noise Ratio (SNR) of the speech signals. Also, the noise category dimension and the SNR dimension are chosen for training and testing manifold DNNs since these are dimensions often taken into account for the SE systems. Further, the IRM in each frequency channel for all noisy signal samples is concatenated to reconstruct the noiseless speech signal. At last, the experimental outcomes exhibit considerable improvement in SE under different categories of noises.

scholarly journals Evaluation of speech signal features extraction methods

2020 ◽  
Vol 2 (1) ◽  
pp. 69-78
Author(s):  
Ismail Shayeb ◽  
Naseem Asad ◽  
Ziad Alqadi ◽  
Qazem Jaber
Keyword(s):  
Speech Signal ◽  
High Speed ◽  
Research Paper ◽  
Extraction Methods ◽  
Features Extraction ◽  
Experimental Results ◽  
Extraction Time ◽  
Digital Signals ◽  
Human Speech ◽  
Signal Features

Human speech digital signals are famous and important digital types, they are used in many vital applications which require a high speed processing, so creating a speech signal features is a needed issue. In this research paper we will study more widely used methods of features extraction, we will implement them, and the obtained experimental results will be compared, efficiency parameters such as extraction time and throughput will be obtained and a speedup of each method will be calculated. Speech signal histogram will be used to improve some methods efficiency.

The Design of Web-Based Ear-Nose-Throat Diagnosis System

2012 ◽  
Vol 490-495 ◽  
pp. 1767-1771
Author(s):  
Yong Hua Xuan ◽  
Wen Tong Liu ◽  
Guo Qing Cao ◽  
Ying Zhang
Keyword(s):  
Web Browser ◽  
Web Based ◽  
Diagnosis System ◽  
Face To Face ◽  
Software And Hardware ◽  
Video And Audio ◽  
Audio Files ◽  
Symptoms And Signs ◽  
Diagnostic Condition

In this paper, a web-based remote ENT diagnosis system is proposed. This service model encourages busy modem office workers to frequently understand their health conditions using a convenient manner. The software and hardware components are developed for patients and physicians. At the patient site, the EDH is implemented to acquire patients' symptoms and signs, and these symptoms and signs are recorded as video and audio files using a SDRS program. The SDRS program further transmits hese files and data to the VHS. Physicians may review the EPR through conventional web browser. Finally, tentative diagnostic reports are made for patients’ references. Two case studies are tested to verify the quality of remote diagnosis. Experiment results demonstrated that the proposed remote ENT diagnosis systems successful establish similar ENT diagnostic condition compared to face-to-face diagnoses.

The Future of Real Time Communications Technologies in E-Learning

2008 ◽  
pp. 283-293
Author(s):  
Richard Caladine
Keyword(s):  
Real Time ◽  
New Technology ◽  
Discussion Forums ◽  
Theoretical Approaches ◽  
Communications Technologies ◽  
Video Chat ◽  
E Learning ◽  
Computer Based ◽  
Access Grid ◽  
Video And Audio

In the previous chapters three real time communications technologies (RTCs) have been discussed. Videoconferences have been used for real time communications in distance learning for many years. In recent years many institutions have used videoconferences in addition to the text-based communications tools in learning management systems: discussion forums and chat. Video chat is a new technology. It is computer based and inexpensive after the purchase of the computer as software is often free and the basic audio and video equipment is inexpensive. Video chat facilitates two-way video and audio communications and thus it is likely to displace videoconference from its place in the market. The Access Grid is also gaining use in education as a teaching tool due to the richness of the experience of multiple video streams, and additional tools that allow true collaboration. How these technologies are used in educational settings has a direct impact on the effectiveness and efficiency of the educational experience and theoretical guides to their use have been discussed earlier in this book. One of the early theoretical approaches was that put forward by Michael Moore.

Content Repurposing for Small Devices

2011 ◽  
pp. 110-115
Author(s):  
Neil C. Rowe
Keyword(s):  
Real Time ◽  
Automated Planning ◽  
High Rate ◽  
Handheld Devices ◽  
Personal Digital Assistants ◽  
Web Page ◽  
Multimedia Delivery ◽  
Video And Audio ◽  
New Devices

Content repurposing is the reorganizing of data for presentation on different display hardware (Singh, 2004). It has been particularly important recently with the growth of handheld devices such as personal digital assistants (PDAs), sophisticated telephones, and other small specialized devices. Unfortunately, such devices pose serious problems for multimedia delivery. With their tiny screens (150 by 150 for a basic Palm PDA or 240 by 320 for a more modern one, vs. 640 by 480 for standard computer screens), one cannot display much information (i.e., most of a Web page); with their low bandwidths, one cannot display video and audio transmissions from a server (i.e., streaming) with much quality; and with their small storage capabilities, large media files cannot be stored for later playback. Furthermore, new devices and old ones with new characteristics have been appearing at a high rate, so software vendors are having difficulty keeping pace. So some real-time, systematic, and automated planning could be helpful in figuring how to show desired data, especially multimedia, on a broad range of devices.

A restudy of postcolonial Palau after two decades

2020 ◽  
Vol 30 (1-2) ◽  
pp. 34-59
Author(s):  
Kazuko Matsumoto
Keyword(s):  
Real Time ◽  
Linguistic Analysis ◽  
Spoken Language ◽  
Written Language ◽  
Future Scenarios ◽  
Language Policies ◽  
Social Division ◽  
English Speaking ◽  
Ethnographic Analysis

Abstract This paper reports results from a reinvestigation of multilingualism in postcolonial Palau, conducted twenty years after the first study. The first-ever ethnographic language survey conducted in 1997–1998 highlighted the diglossic nature of Palau where English replaced Japanese as the ‘high’ language, while indigenous Palauan remained as the ‘low’ spoken language. It indicated three possible future scenarios: (a) shift from multilingualism to bilingualism after the older Japanese-speaking generation passes away; (b) stability of diglossia with a clear social division between an English-speaking elite and a predominantly Palauan-speaking non-elite; (c) movement towards an English-speaking nation with Palauan being abandoned. The restudy conducted in 2017–2018 provides real-time evidence to assess the direction and progress of change, whilst the ethnographic analysis of recent changes in language policies and the linguistic analysis of teenagers’ narratives reveal the unpopularity of Palauan as a written language and the emergence of their own variety of English.

scholarly journals The software and hardware architecture of the real-time protection of in-vessel components in JET-ILW

2019 ◽  
Vol 59 (7) ◽  
pp. 076016 ◽  
Author(s):  
V. Huber ◽  
A. Huber ◽  
D. Kinna ◽  
G.F. Matthews ◽  
G. Sergienko ◽  
...  
Keyword(s):  
Real Time ◽  
Hardware Architecture ◽  
The Real ◽  
Software And Hardware
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