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A thesis about audio compression released online by Afterdawn & cd-rw.org

Written by Lasse Penttinen @ 24 Oct 2002 1:13

Mr.Ye Wang of Nokia Research Center has released his thesis 'Selected Advances in Audio Compression and Compressed Domain Processing' online via Afterdawn & cd-rw.org. Don't miss this opportunity to get scientific information about the principles used in audio compression
Introduction

In the past couple of years, an explosive growth in the use of the Internet and mobile telephones has been experienced. The convergence of these two technologies will open a wide range of new opportunities for the already flourishing multimedia market .

Wideband audio is an important element of multimedia. The Internet transmission of compressed digital audio, such as MP3, has already shown a profound effect on the traditional process of music distribution. With increasing channel capacity available in the new generation of mobile networks, it is logical to
envision an interesting scenario that would bring music to a mobile terminal via the Internet. For example, music or radio programs can be ordered for immediate or later listening; web-based services can be accessed via the mobile network; music can be distributed from peer to peer; and interactive audiorelated games can be played with friends. These applications can be implemented within the different technical requirements of the communication systems. Depending on the constraints on delay, three types of communication modes can be employed. These are non-real-time messaging, near real-time browsing, and two-way real-time rich call. Messaging does not have any constraint on delay. Browsing has some constraint on delay to the degree that is not very annoying to the customers. Two-way real-time rich call has the strictest constraint on delay, which should not exceed 250 ms

These scenarios could provide added value to consumers and become an important form of mobilecommerce (m-commerce) in the near future. However, the characteristics of mobile networks pose special problems to making this vision a reality. This dissertation addresses some of the relevant technical aspects and reports some advances.


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