نتایج جستجو برای: audio

تعداد نتایج: 68336  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی برق 1385

تغییرات مشخصه آکوستیکی واج ها تحت متن های مختلف موجب شده است که در پیاده سازی سیستم-های بازشناسی گفتار، از واحد های گفتاری وابسته به متن مانند هجا و نیم هجا که اثرات آواهای مجاور را نیز در نظر می گیرند، استفاده شود. با توجه به اینکه زبان فارسی از دسته زبانهایی می باشد که دارای ساختار هجایی ساده ای است، در این تحقیق واحد گفتاری نیم هجا برای مدلسازی طیفی مورد توجه قرار گرفته است و آزمون های متعدد...

2009
Yolanda Vazquez-Alvarez Stephen Brewster

Audio-driven eyes-free interactions in which simultaneous audio streams are employed can overload the user. We propose the use of an audio minimization technique in a 3D audio interface that will allow the user to minimize streams while focusing on a different interaction. We first introduce the concept of audio minimization and then describe the design and evaluation of a study set out to inve...

1999
Heiko Purnhagen HEIKO PURNHAGEN

The MPEG-4 Audio Standard provides audio and speech coding for natural and synthetic content at bitrates ranging from 2 to 64 kbit/s and above. While the first version of MPEG-4 Audio was finalised in 1998, work continues for Version 2, complementing MPEG-4 Audio by the following new tools: Error Resilience, Low-Delay Audio Coding, Small Step Scalability, Parametric Audio Coding, and Environmen...

2002
Sabine Deligne Gerasimos Potamianos Chalapathy Neti

In this paper, we introduce a non-linear enhancement technique called Audio-Visual Codebook Dependent Cepstral Normalization (AVCDCN) and we consider its use with both audio-only and audio-visual speech recognition. AVCDCN is inspired from CDCN [1] [2], an audio-only enhancement technique that approximates the non-linear effect of noise on speech with a piece-wise constant function. Our experim...

2007
Arshia Cont Shlomo Dubnov Gérard Assayag

In this article, a method is proposed for fast and automatic retrieval of factors of audio content in a large audio database based on user’s audio query. The proposed method, unlike most existing systems, takes explicit considerations of temporal morphology of audio content. This work touches upon several existing approaches and technologies for sound manipulations, such as sound texture synthe...

2014
Benjamin Elizalde Mirco Ravanelli Karl Ni Damian Borth Gerald Friedland

Multimedia event detection (MED) on user-generated content is the task of finding an event, e.g., a Flash mob or Attempting a bike trick, using its content characteristics. Recent research has focused on approaches that use semantically defined “concepts” trained with annotated audio clips. Using audio concepts allows us to show semantic evidence of their relationship to events, by looking at t...

2013
Shubhangi Suryawanshi

Audio cryptography is same like a visual cryptography. A plain data (audio file) is split into two or more shares. Each single share does not convey any meaning but when shares are combined together they will reveal the original data. In Audio cryptography the "plaintext" is an audio File. k out of n Nonbinary Audio Cryptography scheme is a special type of secret sharing scheme which is more se...

2009
SONAM DUBEY

Audio coding is widely used in application such as digital broadcasting, Internet audio or music database to reduce the bit rate of high quality audio signal without comprising the perceptual quality. In this paper work high quality audio codec at low bit rate using wavelet transform and improvement in reconstructed wave using post filtering has been proposed. The major issues concerning the de...

2010
George Tzanetakis

Marsyas is an open source software framework for audio analysis, synthesis and retrieval with specific emphasis on Music Information Retrieval. It is developed by an international team of programmers and researchers led by George Tzanetakis. In MIREX 2010 the Marsyas team participated in the following tasks: Audio Classical Composer Identification, Audio Genre Classification (Latin and Mixed), ...

2009
Huan Li Zheng Qin Li-Ping Shao Shanjun Zhang Bin Wang

A novel Variable Dimension Space Audio Scrambling Algorithm Against MP3 Compression is proposed. The algorithm is implemented in audio position space, which changes the dimension of coordinates and uses arbitrary matrices to scramble audio. The scrambled audio was segmented and a sequence number is embedded in the front of each segment to discriminate different segments. The proposed method can...

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