[Open-graphics] Avoiding patent minefields with DSP?

[James Richard Tyrer]

Dieter wrote:
>> 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.

MPEG is audio and video.

>> 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"

But the 646 doesn't.

-- 
JRT