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 /spl mu/m CMOS library, which integrates 30 k gates and dissipates 4.54 mW at 2.5 V supply.
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机译：描述了专用于便携式音频设备的MPEG-4音频解码器的VLSI实现。 MPEG-4音频在声音质量和压缩率方面超越了传统的音频编解码器方案。基于声音质量评估的结果，通过帧级流水线和功能数据路径的优化设计了一种低功耗架构。所建议的MPEG-4音频解码器已使用0.25 / spl mu / m CMOS库实现，该库集成了30 k的门并在2.5 V电源下耗散4.54 mW。
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