VLSI implementation of portable MPEG-4 audio decoder

Author

Hashimoto, Shinya ; Niwa, Akimasa ; Okuhata, Hiroyuki ; Onoye, Takao ; Shirakawa, Isao

Author_Institution

Dept. of Inf. & Comput. Sci., Osaka Univ., Japan

fYear

2000

fDate

2000

Firstpage

80

Lastpage

84

Abstract

VLSI implementation of an MPEG-4 audio decoder is described, which is dedicated to portable audio appliances. MPEG-4 audio surpasses conventional audio codec schemes in terms of sound quality and compression rate. Based on the results of sound quality evaluation, a low-power architecture is devised by means of frame-level pipeline and optimization of functional datapath. The proposed MPEG-4 audio decoder has been implemented with the use of 0.25 μm CMOS library, which integrates 30 k gates and dissipates 4.54 mW at 2.5 V supply

Keywords

CMOS integrated circuits; VLSI; audio equipment; audio signal processing; data compression; decoding; low-power electronics; pipeline processing; 0.25 micron; 2.5 V; 4.54 mW; CMOS library; VLSI implementation; compression rate; frame-level pipeline; functional datapath; low-power architecture; portable MPEG-4 audio decoder; portable audio appliances; sound quality; Audio coding; Bandwidth; Bit rate; Decoding; Filter bank; Information systems; MPEG 4 Standard; Signal to noise ratio; Systems engineering and theory; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC/SOC Conference, 2000. Proceedings. 13th Annual IEEE International

Conference_Location

Arlington, VA

Print_ISBN

0-7803-6598-4

Type

conf

DOI

10.1109/ASIC.2000.880680

Filename

880680