نتایج جستجو برای: audio signal
تعداد نتایج: 477437 فیلتر نتایج به سال:
Our final project will be designing and implementing an audio system in which the audio signal is input, wirelessly transmitted, audio filtered and equalized. The audio is inputted through a microphone and is digitized using an Analog-To-Digital converter with the LM4550 AC’97 Codec. The audio signal is then compressed using the Discrete Cosine Transform (DCT) and is wirelessly transmitted and ...
This work describes an investigation into the feasibility of producing intelligible audio speech from only visual speech features. The proposed method aims to estimate a spectral envelope from visual features which is then combined with an artificial excitation signal and used within a model of speech production to reconstruct an audio signal. Different combinations of audio and visual features...
Data hiding in audio signal enables acoustic data transmission by playing back the data-embedded audio and by recording the signal and extracting the data at receiver like mobile devices. In our previous work, we proposed an audio data hiding system for acoustic data transmission, of which the audio quality and transmission performance are suitable, based on phase modification of the modulated ...
This paper discusses the use of Python for developing audio signal processing applications. Overviews of Python language, NumPy, SciPy and Matplotlib are given, which together form a powerful platform for scientific computing. We then show how SciPy was used to create two audio programming libraries, and describe ways that Python can be integrated with the SndObj library and Pure Data, two exis...
Noise Filtering in audio signals has always been a challenge since the noise is spread across a large bandwidth and overlaps the spectral range of the audio signal being recovered. In audio systems all these can be kept below the audible level but ambient noise may not be avoided even if the audio system is designed according to the best practices. So, there have been several audio filtering te...
Audio coding is the technology to represent audio in digital form with as few bits as possible while maintaining the intelligibility and quality required for particular application. Interest in audio coding is motivated by the evolution to digital communications and the requirement to minimize bit rate, and hence conserve bandwidth. There is always a tradeoff between lowering the bit rate and m...
The growing implementation of technology had significant impact on its methods and practice. One technology with such an impact is the ever growing use of wireless systems in hospitals, industries and biomedical institutions. The objective is to transfer processed real time signal over Bluetooth using PIC Microcontroller. This is applicable for monitoring certain parameters such as temperature,...
Audio signal classification consists of extracting physical and perceptual features from a sound, and of using these features to identify into which of a set of classes the sound is most likely to fit. The feature extraction and classification algorithms used can be quite diverse depending on the classification domain of the application. This paper presents an overview of the current state of t...
The design, implementation, and evaluation of a system for automatic audio signal classification is presented. The signals are classified according to audio type, differentiating between three speech classes, 13 musical genres, and background noise. A large number of audio features are evaluated for their suitability in such a classification task, including MPEG-7 descriptors and several new fe...
A new approach to computer music instruments is described. Rather than sense control parameters from acoustic instruments (or non-acoustic instrument controllers), the sound of an acoustic instrument is used directly by a synthesis algorithm, usually replacing an oscillator. Parameters such as amplitude and pitch can control other aspects of the synthesis. This approach gives the player more co...
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