LSI, Bosch link-up on single-chip DAB

LSI, Bosch link-up on single-chip DAB
Steve Bush LSI Logic and Bosch have jointly developed a single-chip digital audio broadcast (DAB) baseband processor. “Until now people have used multiple DSPs or custom chipsets with five or six chips,” said Mike Casey, LSI’s marketing director for wireless and mobile products. The chip uses a 32-bit MIPS miniRISC as a control processor and a 16-bit fixed point Oak DSP for number crunching. “Bosch supplied the system specification and we implemented hardware to meet this using our CoreWare design programme,” said Casey. Casey makes the point that the chip can decode more than just one audio stream: “It can handle an entire 1.6Mbit/s DAB ensemble. This could be a few high quality stereo channels or many speech channels, even MPEG-1 video over DAB. I am not aware of anyone else that can do this in a single-chip.” The chip is aimed squarely at commercial applications “where the overall selling price of a product is perhaps a couple of hundred dollars”, said Casey. Hitachi announced a single-chip baseband processor for DAB based on its SH-DSP last year.


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