A hierarchical lossless/lossy coding system for high quality audio up to 192 kHz sampling 24 bit format

Author

Jin, Akio ; Moriya, Takehiro ; Ikeda, Kazunaga ; Yang, Dai Tracy

Author_Institution

NTT Commun. Corp., Tokyo, Japan

Volume

49

Issue

3

fYear

2003

Firstpage

759

Lastpage

764

Abstract

We present a flexible audio coding system for use in the continuous transmission of high-quality (192-kHz sampling rate, up to 24-bit digitization) stereo-audio data streams, either live or recorded. The system provides both lossless and variable-level lossy quality; quality is selectable to suit a full range of wide- and narrow-band IP networks. As input signals for transmission at the server PC, less than nine PCM sound files in different formats are simultaneously encodable, and the efficiency of simultaneous compression is very high. The system is realized by software that runs on a typical PC. This gives everyone on an IP network the ability to transmit high-quality sound anywhere within the network. An MPEG-4 audio codec provides the core of the lossy coding module.

Keywords

audio coding; signal sampling; IP networks; MPEG-4 audio codec; PCM sound files; flexible audio coding system; hierarchical coding system; high quality audio; high-quality stereo-audio data; lossless coding; lossy coding; Audio coding; Codecs; File servers; IP networks; MPEG 4 Standard; Narrowband; Network servers; Phase change materials; Sampling methods; Streaming media;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2003.1233815

Filename

1233815