A Dolby AC-3/MPEG1 audio decoder core suitable for audio/visualsystem integration

摘要

A synthesizable Dolby AC-3/MPEG1 audio decoder core has beenndeveloped for use in audio/visual system LSIs. In order to optimize thencore both in size and power consumption, it employs a dedicated designnapproach rather than a DSP approach. Moreover, the core is designed tonoperate at 27 MHz, which is slower than reported DSP implementations,nand is useful for integration with digital video decoders. Annexperimental decoder chip has successfully fabricated using a 0.35 umncell-based CMOS technology, to evaluate the AC-3/MPEG1 audio decoderncore. Because the chip integrates a 61 Kbit RAM with the core, it cannachieve 5.1 ch AC-3 decoding by single-chip. The developed and evaluatedndecoder core is utilized in variable digital audio/video system chips,nincluding single-chip DVD A/V decoders