[Open-graphics] Avoiding patent minefields with DSP?

[Dieter]

> The Sigma 
> chips are hardware decoder chips for MPEG and other codecs so that is 
> all they would do.

Sigma mumbles something about audio DSP.

> There are clearly integration issues.  The TI chips probably wouldn't be 
> able to access memory at 200 MHz DDR so that would be an issue that I 
> would solve with a very small read cache and a posted write buffer. 

> It would be more useful if they had a model that supported DDR/DDR2 
> SDRAM.

The datasheet for the TI DM6446 (DM6443 is probably the same) says:

"32 bit DDR2 SDRAM memory controller with 256 M-Byte address space"