MP3 is the popular audio coding standard. But now, a new higher quality audio coding standard Advanced Audio Coding (AAC) is proposed and widely used. The quantization/re-quantization is essential in both MP3 and AAC. It proposes a new high accuracy estimation algorithm for MP3 and MEPG-4 AAC audio coding. The algorithm can be applied not only for re-quantization process in decoder, but also fo...

AudioFile is a portable, device-independent, network-transparent system for computer audio systems. Similar to the X Window System, it provides an abstract interface with a simple network protocol to support a variety of audio hardware and multiple simultaneous clients. This report describes our approach to digital audio, the AudioFile protocol, the client library, the audio server, and some cl...

We present a query-by-example system for content-based music information retrieval by ranking items in a database based on semantic similarity, rather than acoustic similarity, to a query example. The retrieval system is based on semantic concept models that are learned from the CAL500 data set containing both audio examples and their text captions. Using the concept models, the audio tracks ar...

An online audio classiication and segmentation system is presented in this research, where audio recordings are classiied and segmented into speech, music, several types of environmental sounds and silence based on audio content analysis. This is the rst step of our continuing work towards a general content-based audio classiication and retrieval system. The extracted audio features include tem...

Recently, the rapid advancement of IT industry has resulted in significant changes audio-system configurations; particularly, audio over internet protocol (AoIP) network-based audio-transmission technology received favourable evaluations this field. Applying AoIP a certain section multiple-cable zone is advantageous because installation cost lower than that for existing systems, and original so...

The content-based classification and retrieval of real-world audio clips is one of the challenging tasks in multimedia information retrieval. Although the problem has been well studied in the last two decades, most of the current retrieval systems cannot provide flexible querying of audio clips due to the mixed-type form (e.g., speech over music and speech over environmental sound) of audio inf...