منابع مشابه
Task adaptation for dialogues via telephone lines
This paper describes our successful ongoing approaches toward better recognition accuracy for exible interactive systems in automatic speech recognition. Degradation in performance of speech recognition systems is observed whenever any current application di ers from the conditions during training time. Main speaker independent causes for these deteriorations are changes in transmission channel...
متن کاملA Computationally Efficient Echo Canceler Algorithm for Multiple Telephone Lines
This paper proposes a computationally efficient echo canceler algorithm for multiple telephone lines. The total number of coefficient adaptations is limited and distributed among channels depending on the degree of convergence. Coefficient adaptations are more frequently performed in the channels where convergence is behind others. Each adaptive filter is implemented as a sparse-tap adaptive fi...
متن کاملA Hybrid Genetic-Neural Front-End Extension for Robust Speech Recognition over Telephone Lines
This paper presents a hybrid technique combining the Karhonen-Loeve Transform (KLT), the Multilayer Perceptron (MLP) and Genetic Algorithms (GAs) to obtain less-variant Mel-frequency parameters. The advantages of such an approach are that the robustness can be reached without modifying the recognition system, and that neither assumption nor estimation of the noise are required. To evaluate the ...
متن کاملThe Telco's Goldmine - 50 Mb/s to the General Public over the Local Telephone Lines
This chapter describes a new scenario for how to transform the existing telephone access network into a real broadband network. The objective is to introduce a low-cost network evolution scenario, which makes maximal use of the huge investments associated with this kind of network. The existing network is sub-divided into a small cell network, each covering an area with an approximate radius of...
متن کاملAssessment of the quality of neonatal echocardiographic images transmitted by ISDN telephone lines.
OBJECTIVE To assess the quality of echocardiographic images from neonates transmitted over Integrated Service Digital Network 2 (ISDN2) channels. DESIGN Echocardiographic images were viewed live in real time either by a direct video link or by transmission over the commercial network, using one, two, or three ISDN2 channels. The order of the viewing formats was random and four observers marke...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1903
ISSN: 0028-0836,1476-4687
DOI: 10.1038/068076c0