An important aid in analysis & display of speech is sound spectrogram. It represents time-frequen... more An important aid in analysis & display of speech is sound spectrogram. It represents time-frequency-intensity display of short time spectrum. The quality of speech can be studied by visual inspection of spectrogram. This is one of the important applications of spectrogram in speech processing especially in speech enhancement. Another application of spectrogram is in isolating voiced and unvoiced regions. But to conclude from visual inspection the clarity of spectrogram is also important. Before plotting the spectrogram the time domain speech signal is converted to frequency domain. The transform domain used plays vital role in resolution of spectrogram. Generally Fast Fourier Transform is used to convert the time domain signal into frequency domain signal. This paper discusses the effect of using different transform for converting the time domain speech signal into frequency domain before plotting spectrogram.. It is observed that resolution of speech spectrogram is transform depend...
Heart rate variability (HRV) refers to the beat-to-beat alterations in heart rate. HRV analysis i... more Heart rate variability (HRV) refers to the beat-to-beat alterations in heart rate. HRV analysis is based on the concept that, fast fluctuations reflect the changes of sympathetic and vagal activity which results in variability of intervals between R waves i.e. “RR intervals”. In the current work HRV was assessed by traditional linear time and frequency-domain indexes, in parallel with the non linear Poincare plot analysis. Initially R peaks are detected from the ECG and RR interval signal is obtained which is further used to get the HRV signal. Spectral analysis of this HRV signal is done to estimate the power content in different frequency bands. Two frequency bands play a vital role in the power spectrum, a low frequency and a high frequency. Simultaneously, for time domain analysis, parameters such as mean of RR interval signal, standard deviation, coefficient
Journal of Electrical Engineering & Technology, 2017
Like all technologies, new teaching technologies can be used in teaching. Traditional teaching he... more Like all technologies, new teaching technologies can be used in teaching. Traditional teaching helps in memorizing the things. It is found that teaching with active learning strategies will improve students' learning level. Flipped classroom is an active learning strategy that reverses the traditional learning environment. This paper discusses the Flipped classroom concept applied for teaching subject Computer Communication Network. For this study, we considered two group pre-post test method. The Flipped classroom method improved student's learning. The students who underwent Flipped classroom treatment found to have more clear understanding of the topic compared to the students learnt topic with traditional teaching. We also presented the feedback and results about the Flipped classroom.
The paper presents speech enhancement scheme for suppression of different background noises. The ... more The paper presents speech enhancement scheme for suppression of different background noises. The objective of speech enhancement is to improve the quality of the processed speech. This paper also investigate the use of two different transforms for speech enhancement. Speech enhancement using wiener filtering approach is presented using transforms DFT and DCT. The type of transform shows different amount of quality improvement using same type of filtering i.e, Hybrid Wiener Filtering. Keywords— Speech Enhancement, Hybrid Filter, DFTF, DCTF, Wiener Filter, Transform
Noise is an unwanted signal. One of the most common type of noise is a background noise which is ... more Noise is an unwanted signal. One of the most common type of noise is a background noise which is always present. The paper presents speech enhancement scheme for suppression of background noise. The objective of speech enhancement is to improve the perceptual aspect such as quality and intelligibility of the processed speech. The main objective of this paper is to investigate the u se of different transforms for speech enhancement. Speech enhancement using wiener filtering approach is proposed and implemented using DFT, DCT and DWT thus showing the feasibility of utilization of the different transforms.
Abstract: Most of the doctors face problem while giving dose of medicine using syringe to patient... more Abstract: Most of the doctors face problem while giving dose of medicine using syringe to patients who have darker skin tone, have wrinkled skin, small children’s and people who have scorch marks or burned skin. Due to such problems, doctors may insert the syringe in wrong place or it may become harder for doctors to find veins of such patients. This Paper presents a new methodology of Vein Finder Which avoid these problems which many doctors are facing regarding insertion of dose. Vein Finder contains Infrared Camera, Infrared LEDS, Raspberry Pi where the image of particular part of body where the dose is to be inserted is captured and processed digitally which helps to detect the particular vein. This system helps to reduce the stress, trauma and injuries experienced while giving dose. Keywords: Raspberry Pi, Infrared camera, Infrared LEDs, Veins, Processing Cite this Article Rohini Mergu, Vaibhavi Birajdar, Rubina Bagwan, Samprita Batgeri. Vein Detector using Image Processing. Re...
An important aid in analysis & display of speech is sound spectrogram. It represents time-frequen... more An important aid in analysis & display of speech is sound spectrogram. It represents time-frequency-intensity display of short time spectrum. The quality of speech can be studied by visual inspection of spectrogram. This is one of the important applications of spectrogram in speech processing especially in speech enhancement. Another application of spectrogram is in isolating voiced and unvoiced regions. But to conclude from visual inspection the clarity of spectrogram is also important. Before plotting the spectrogram the time domain speech signal is converted to frequency domain. The transform domain used plays vital role in resolution of spectrogram. Generally Fast Fourier Transform is used to convert the time domain signal into frequency domain signal. This paper discusses the effect of using different transform for converting the time domain speech signal into frequency domain before plotting spectrogram.. It is observed that resolution of speech spectrogram is transform depend...
Heart rate variability (HRV) refers to the beat-to-beat alterations in heart rate. HRV analysis i... more Heart rate variability (HRV) refers to the beat-to-beat alterations in heart rate. HRV analysis is based on the concept that, fast fluctuations reflect the changes of sympathetic and vagal activity which results in variability of intervals between R waves i.e. “RR intervals”. In the current work HRV was assessed by traditional linear time and frequency-domain indexes, in parallel with the non linear Poincare plot analysis. Initially R peaks are detected from the ECG and RR interval signal is obtained which is further used to get the HRV signal. Spectral analysis of this HRV signal is done to estimate the power content in different frequency bands. Two frequency bands play a vital role in the power spectrum, a low frequency and a high frequency. Simultaneously, for time domain analysis, parameters such as mean of RR interval signal, standard deviation, coefficient
Journal of Electrical Engineering & Technology, 2017
Like all technologies, new teaching technologies can be used in teaching. Traditional teaching he... more Like all technologies, new teaching technologies can be used in teaching. Traditional teaching helps in memorizing the things. It is found that teaching with active learning strategies will improve students' learning level. Flipped classroom is an active learning strategy that reverses the traditional learning environment. This paper discusses the Flipped classroom concept applied for teaching subject Computer Communication Network. For this study, we considered two group pre-post test method. The Flipped classroom method improved student's learning. The students who underwent Flipped classroom treatment found to have more clear understanding of the topic compared to the students learnt topic with traditional teaching. We also presented the feedback and results about the Flipped classroom.
The paper presents speech enhancement scheme for suppression of different background noises. The ... more The paper presents speech enhancement scheme for suppression of different background noises. The objective of speech enhancement is to improve the quality of the processed speech. This paper also investigate the use of two different transforms for speech enhancement. Speech enhancement using wiener filtering approach is presented using transforms DFT and DCT. The type of transform shows different amount of quality improvement using same type of filtering i.e, Hybrid Wiener Filtering. Keywords— Speech Enhancement, Hybrid Filter, DFTF, DCTF, Wiener Filter, Transform
Noise is an unwanted signal. One of the most common type of noise is a background noise which is ... more Noise is an unwanted signal. One of the most common type of noise is a background noise which is always present. The paper presents speech enhancement scheme for suppression of background noise. The objective of speech enhancement is to improve the perceptual aspect such as quality and intelligibility of the processed speech. The main objective of this paper is to investigate the u se of different transforms for speech enhancement. Speech enhancement using wiener filtering approach is proposed and implemented using DFT, DCT and DWT thus showing the feasibility of utilization of the different transforms.
Abstract: Most of the doctors face problem while giving dose of medicine using syringe to patient... more Abstract: Most of the doctors face problem while giving dose of medicine using syringe to patients who have darker skin tone, have wrinkled skin, small children’s and people who have scorch marks or burned skin. Due to such problems, doctors may insert the syringe in wrong place or it may become harder for doctors to find veins of such patients. This Paper presents a new methodology of Vein Finder Which avoid these problems which many doctors are facing regarding insertion of dose. Vein Finder contains Infrared Camera, Infrared LEDS, Raspberry Pi where the image of particular part of body where the dose is to be inserted is captured and processed digitally which helps to detect the particular vein. This system helps to reduce the stress, trauma and injuries experienced while giving dose. Keywords: Raspberry Pi, Infrared camera, Infrared LEDs, Veins, Processing Cite this Article Rohini Mergu, Vaibhavi Birajdar, Rubina Bagwan, Samprita Batgeri. Vein Detector using Image Processing. Re...
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