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The quality of service (QoS) limitation of Internet is major challenge for Voice over IP (VoIP). Delay jitter and packet loss are two essential problems which impair the communication quality. Conventional quality- driven QoS control methods usually use ITU-T E-Model to maximize the Mean Opinion Score (MOS) in terms of delay and loss. However, all these methods are devised only for narrowband speech...
Robust and flexible speech codecs are more and more required by speech communication over unreliable channels such as Internet. In this paper, a novel multiple description (MD) sinusoidal speech codec is proposed. This codec is based on sinusoidal and equivalent rectangular bands (ERB) noise model. It can provide relatively high transmission reliability as well as good coding efficiency. And the lost...
The problem of information overloading with the use of search engine and the temporal efficiency losing of the indexed data has been a great trouble for the further use of the Internet. In this paper, a novel knowledge based initiative topic search engine called Information Assistant is designed and realized. It breaks through the traditional passive service style of the search engine, and solves...
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