Real-time implementation of a high fidelity MDCT-based codec

Author

Tan, Pek-Yew ; Neo, Sua-Hong ; Tan, Ah-Peng

Author_Institution

AV/Inf. Res. Center, Asia Matsushita Electr. (S) Pte. Ltd., Singapore

Volume

3

fYear

1994

fDate

14-18 Nov 1994

Firstpage

1108

Abstract

This paper discusses the real-time implementation of a high-quality audio codec at a bit rate below 150 kbit/s per monophonic channel on a 24-bit fixed-point DSP (Motorola DSP56002) based hardware. The algorithm is an adaptive modified discrete cosine transform coding technique. Known human hearing characteristics are exploited in the adaptive bit allocation scheme. Both the hardware and software configurations are described, along with measured execution times and program and data memory usages. A high fidelity quality suitable for consumer applications has been achieved

Keywords

Hi-Fi equipment; audio coding; codecs; digital signal processing chips; discrete cosine transforms; transform coding; 150 kbit/s; 24 bit; 24-bit fixed-point DSP; Motorola DSP56002; adaptive bit allocation scheme; adaptive modified discrete cosine transform coding; execution times; hardware configurations; high fidelity MDCT-based codec; high-quality audio codec; human hearing characteristics; real-time implementation; software configurations; Audio coding; Auditory system; Bit rate; Codecs; Digital signal processing; Discrete cosine transforms; HDTV; Hardware; Iterative decoding; Phase change materials;

fLanguage

English

Publisher

ieee

Conference_Titel

Singapore ICCS '94. Conference Proceedings.

Print_ISBN

0-7803-2046-8

Type

conf

DOI

10.1109/ICCS.1994.474306

Filename

474306