scholarly journals Coverless VoIP Steganography Using Hash and Hash

2020 ◽  
Vol 20 (3) ◽  
pp. 102-115
Author(s):  
S. Deepikaa ◽  
R. Saravanan
Keyword(s):  
Computational Complexity ◽  
Voice Quality ◽  
Hash Table ◽  
Secret Message ◽  
Receiver Side ◽  
Secret Data ◽  
Frame Size ◽  
Voice Packets ◽  
Hashing Function ◽  
The Voice

AbstractPerforming secure and robust embedding and extracting in real time voice streams without deteriorating the voice quality is a great challenge. This paper aims on hiding the secret data bits in the voice packets without modifying any data in the cover thereby improving the embedding transparency and becomes robust against the steganalysis attacks using coverless approach. Initially a hash array is built with the frame size. The cover bit position is identified from the hashing function. The hash array is marked with a flag value to indicate that the particular sample consist of the secret message bit. The hash array is attached with the VoIP samples, at the receiver side the hash table is separated, and the secret bits are extracted based on the hash array. The experimental results conducted on a VoIP prototype proved to be simpler and effective in terms of the computational complexity, undetectability and voice quality at both sender and receiver end.

HIDING SECRET DATA THROUGH STEGANOGRAPHY IN VOIP

2017 ◽  
pp. 116-120
Author(s):  
SHILPA SUNIL WANKHADE ◽  
PROF. RAMESH V. SHAHABADE
Keyword(s):  
Information Hiding ◽  
Dynamic Range ◽  
Main Idea ◽  
Voice Over Internet Protocol ◽  
Secret Data ◽  
Wide Dynamic Range ◽  
Wide Range ◽  
Voice Packets ◽  
Voice Chat ◽  
The Voice

Steganography is an effective way of hiding secret data, by this means of protecting the data from unauthorized or unwanted viewing. Using cryptography technique will encrypt and decrypt message to provide better security. Cryptography protects the message from being read by unauthorized parties, steganography lets the sender conceal the fact that he has even sent a message. One of the new and promising communication medium that can be used as steganography is the Voice over Internet Protocol. VOIP covers a wide range of information hiding techniques. The main idea is to use free unused fields of VOIP protocols like TCP, UDP etc. By hiding one secret text into the cover speech using steganography we can get a stego speech, which sounds indistinguishable from the original cover speech. So even if the Hackers/crackers catch the audio packets on network, they would not notice that there is some secret text hidden inside it. To develop a Voice Chat Tool, this can also enable us to send secret data hidden inside the voice packets at the same time. We used LSB method of steganography and for better security we provide encryption to the message to be sent. There is no restriction on the length of message as more the communicators talk larger the file is sent. Human auditory system (HAS) operates over a wide dynamic range. It is challenging to hide secret data inside audio.

scholarly journals Optimising outcome assessment of voice interventions, II: sensitivity to change of self-reported and observer-rated measures

2007 ◽  
Vol 122 (1) ◽  
pp. 46-51 ◽  
Author(s):  
I N Steen ◽  
K MacKenzie ◽  
P N Carding ◽  
A Webb ◽  
I J Deary ◽  
...  
Keyword(s):  
General Health ◽  
Voice Quality ◽  
Voice Handicap Index ◽  
Effect Sizes ◽  
Voice Therapy ◽  
Vocal Performance ◽  
Symptom Scale ◽  
Wide Range ◽  
The Voice ◽  
Responsiveness To Change

AbstractObjectives:A wide range of well validated instruments is now available to assess voice quality and voice-related quality of life, but comparative studies of the responsiveness to change of these measures are lacking. The aim of this study was to assess the responsiveness to change of a range of different measures, following voice therapy and surgery.Design:Longitudinal, cohort comparison study.Setting:Two UK voice clinics.Participants:One hundred and forty-four patients referred for treatment of benign voice disorders, 90 undergoing voice therapy and 54 undergoing laryngeal microsurgery.Main outcome measures:Three measures of self-reported voice quality (the vocal performance questionnaire, the voice handicap index and the voice symptom scale), plus the short form 36 (SF 36) general health status measure and the hospital anxiety and depression score. Perceptual, observer-rated analysis of voice quality was performed using the grade–roughness–breathiness–asthenia–strain scale. We compared the effect sizes (i.e. responsiveness to change) of the principal subscales of all measures before and after voice therapy or phonosurgery.Results:All three self-reported voice measures had large effect sizes following either voice therapy or surgery. Outcomes were similar in both treatment groups. The effect sizes for the observer-rated grade–roughness–breathiness–asthenia–strain scale scores were smaller, although still moderate. The roughness subscale in particular showed little change after therapy or surgery. Only small effects were observed in general health and mood measures.Conclusion:The results suggest that the use of a voice-specific questionnaire is essential for assessing the effectiveness of voice interventions. All three self-reported measures tested were capable of detecting change, and scores were highly correlated. On the basis of this evaluation of different measures' sensitivities to change, there is no strong evidence to favour either the vocal performance questionnaire, the voice handicap index or the voice symptom scale.

Conversion from a non-indwelling to a Provox®2 indwelling voice prosthesis for speech rehabilitation: comparison of voice quality and patient preference

2003 ◽  
Vol 117 (10) ◽  
pp. 815-820 ◽  
Author(s):  
A. C. Vlantis ◽  
R. T. Gregor ◽  
H. Elliot ◽  
M. Oudes
Keyword(s):  
Patient Satisfaction ◽  
Prospective Study ◽  
Patient Preference ◽  
Acoustic Analysis ◽  
Voice Quality ◽  
Voice Prosthesis ◽  
Technical Aspects ◽  
Speech Rehabilitation ◽  
Perceptual Difference ◽  
The Voice

This prospective study assessed the advantages and problems associated with converting a patient using an older generation non-indwelling voice prosthesis to a newer generation indwelling voice prosthesis, in this case the Provox®2. The voice characteristics of each patient were measured using the old and then the new voice prosthesis. Technical aspects of the insertion of the indwelling prosthesis were noted. Each patient completed a questionnaire after a period of use with the indwelling prosthesis.Changing the prosthesis was simple and uncomplicated in 15 of 17 patients. Acoustic analysis showed improved parameters with the indwelling prosthesis, but no perceptual difference between the two prostheses. The questionnaire revealed that most patients preferred the indwelling prosthesis.Replacing a non-indwelling with an indwelling prosthesis is technically simple, leading to improvement in voice quality and patient satisfaction. It may be reasonable to offer this choice to patients currently using an older generation non-indwelling voice prosthesis.

scholarly journals The voice quality of sports coaches

Logopedija ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Anđela Bučević ◽  
Ana Bonetti ◽  
Luka Bonetti
Keyword(s):  
Voice Quality ◽  
Training Session ◽  
Acoustic Method ◽  
Male And Female ◽  
Significant Difference ◽  
Before And After ◽  
Sports Coaches ◽  
The Voice ◽  
Female Coaches

The aim of this research paper was to examine the voice quality of sports coaches using the objective (acoustic) method. A total of 28 sports coaches (mean age 28.58, SD=5.08), from the City of Zagreb participated in this research. Recordings of the phonation of the vowel /a/ before and after one training session were obtained and analyzed using the PRAAT Program. Mean, minimal and maximal values of fundamental frequency, shimmer, jitter and harmonics-to-noise ratio were observed. The statistical analyses showed no statistically significant difference in acoustic voice quality of male and female coaches before and after the training session, or between male and female coaches. However, intra-individual differences among participants were observed, which may be significant in terms of their potential to affect the quality of their voices in the future.

scholarly journals Voice re-education and its evaluation through digital signal processing: A case study

Loquens ◽  
2017 ◽  
Vol 4 (1) ◽  
pp. 040
Author(s):  
Zulema Santana-López ◽  
Óscar Domínguez-Jaén ◽  
Jesús B. Alonso ◽  
María Del Carmen Mato-Carrodeguas
Keyword(s):  
Voice Quality ◽  
Quality Measurement ◽  
Digital Signal ◽  
Communication Process ◽  
Time Frequency ◽  
Voice Signal ◽  
Functional Dysphonia ◽  
Before And After ◽  
Voice Pathologies ◽  
The Voice

Voice pathologies, caused either by functional dysphonia or organic lesions, or even by just an inappropriate emission of the voice, may lead to vocal abuse, affecting significantly the communication process. The present study is based on the case of a single patient diagnosed with myasthenia gravis (Erb-Goldflam syndrome). In this case, this affection has caused, among other disruptions, a dysarthria. For its treatment, a technique for the education and re-education of the voice has been used, based on a resonator element: the cellophane screen. This article shows the results obtained in the patient after applying a vocal re-education technique called the Cimardi Method: the Cellophane Screen, which is a pioneering technique in this field. Changes in the patient’s voice signal have been studied before and after the application of the Cimardi Method in different domains of study: time-frequency, spectrum, and cepstrum. Moreover, parameters for voice quality measurement, such as shimmer, jitter and harmonic-to-noise ratio (HNR), have been used to quantify the results obtained with the Cimardi Method. Once the results were analyzed, it has been observed that the Cimardi Method helps to produce a more natural and free vocal emission, which is very useful as a rehabilitation therapy for those people presenting certain vocal disorders.

A Design of Automatic Bus Station Reporter Based on VS1003 and SD Card

2013 ◽  
Vol 671-674 ◽  
pp. 2847-2850
Author(s):  
Xue Ming Deng ◽  
Qiao Wei Liu ◽  
Dong Song Yang ◽  
Yi Fei Zhang ◽  
Kan Jun Fu
Keyword(s):  
Voice Quality ◽  
Bus Station ◽  
Sd Card ◽  
The Voice

We aim to invent an automatic bus station reporter based on GPS module, VS1003 chip and SD card. Firstly, the VS1003 chip within the reporter can both decode and play the MP3 files, greatly improving the voice quality of the reporter itself. Secondly, the SD card with giant storage can store the information of bus stations and the accordingly voice files, making it free from the limit of capacity. Besides, with the change of SD cards, the reporter can adjust itself to different bus lines and gives different voice messages.

S179 – Voice Self-evaluation after Treatment for T1 Glottic Cancer

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P136-P136
Author(s):  
Faustino Nunez ◽  
Maria Jesus Caminero ◽  
Jose-Luis Llorente-Pendas ◽  
Carlos Suarez-Nieto
Keyword(s):  
Laser Surgery ◽  
Voice Quality ◽  
Well Being ◽  
Voice Handicap Index ◽  
Glottic Cancer ◽  
Glottic Carcinoma ◽  
Subjective Analysis ◽  
Maximum Phonation Time ◽  
Self Evaluation ◽  
The Voice

Objectives 1) To present the objective and subjective analysis of voice quality following treatment of an early epidermoid glottic carcinoma. 2) Results from the objective evaluation of the voice, along with the self-evaluation of voice quality quantified using the Voice Handicap Index of a group of patients treated with endoscopic laser surgery, are compared with patients treated with radiotherapy. Methods We performed an objective voice evaluation, as well as a physical, emotional, and functional well-being assessment of 19 patients treated with laser surgery and 18 patients treated with radiotherapy. The data obtained was gathered in the statistical database SPSS 12.0. The statistical analysis used was the “Student t test” in order to compare averages and the Chi-squared test for comparing proportions. The statistical differences were considered significant when p was lower than 0.05. Results Voice quality is affected both by surgery and radiotherapy. Voice parameters only show differences in the maximum phonation time between both treatments (p < 0,005). Patients Self-Perception Analysis (Voice Handicap Index) Upon completing the comparison between the two groups, the statistical difference is significant, in favor of the radiotherapy patients in functional and emotional ratings, as well as the global scores (p < 0,005). No significant differences were found in the physical scales. Conclusions There is a reduced impact in patient's perception of voice quality after radiotherapy, despite no significant differences in vocal quality between radiotherapy and laser cordectomy.

Research of Enhanced Speech Signal Based on MATLAB Simulation Platform

2013 ◽  
Vol 278-280 ◽  
pp. 1124-1128
Author(s):  
Yi Long You ◽  
Fei Zhang ◽  
Bu Lei Zuo ◽  
Feng Xiang You
Keyword(s):  
Speech Signal ◽  
Speech Intelligibility ◽  
Voice Quality ◽  
Signal Enhancement ◽  
Experimental Simulation ◽  
Simulation Platform ◽  
Matlab Simulation ◽  
Threshold Method ◽  
The Voice

Although traditional algorithms can led to suppressed voice in the noise, but the distortion of the voice is inevitable. An introduction is made as to the speech signal enhancement with an improved threshold method. Compared MATLAB experimental simulation on simulated platform with traditional enhanced algorithm, this paper aims to verify this method can effectively remove the noise in the signal, enhanced voice quality, improve speech intelligibility, and achieve the effect of the enhanced speech signal.

scholarly journals Age Differences in Voice Evaluation: From Auditory-Perceptual Evaluation to Social Interactions

2018 ◽  
Vol 61 (2) ◽  
pp. 227-245 ◽  
Author(s):  
Catherine L. Lortie ◽  
Isabelle Deschamps ◽  
Matthieu J. Guitton ◽  
Pascale Tremblay
Keyword(s):  
Social Interactions ◽  
Age Differences ◽  
Smoking Status ◽  
Voice Quality ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Younger Adults ◽  
Perceptual Evaluation ◽  
Younger Age ◽  
The Voice

Purpose The factors that influence the evaluation of voice in adulthood, as well as the consequences of such evaluation on social interactions, are not well understood. Here, we examined the effect of listeners' age and the effect of talker age, sex, and smoking status on the auditory-perceptual evaluation of voice, voice-related psychosocial attributions, and perceived speech tempo. We also examined the voice dimensions affecting the propensity to engage in social interactions. Method Twenty-five younger (age 19–37 years) and 25 older (age 51–74 years) healthy adults participated in this cross-sectional study. Their task was to evaluate the voice of 80 talkers. Results Statistical analyses revealed limited effects of the age of the listener on voice evaluation. Specifically, older listeners provided relatively more favorable voice ratings than younger listeners, mainly in terms of roughness. In contrast, the age of the talker had a broader impact on voice evaluation, affecting auditory-perceptual evaluations, psychosocial attributions, and perceived speech tempo. Some of these talker differences were dependent upon the sex of the talker and his or her smoking status. Finally, the results also show that voice-related psychosocial attribution was more strongly associated with the propensity of the listener to engage in social interactions with a person than auditory-perceptual dimensions and perceived speech tempo, especially for the younger adults. Conclusions These results suggest that age has a broad influence on voice evaluation, with a stronger impact for talker age compared with listener age. While voice-related psychosocial attributions may be an important determinant of social interactions, perceived voice quality and speech tempo appear to be less influential. Supplemental Materials https://doi.org/10.23641/asha.5844102

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