Brooktree Bt848

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A PCI interface chipset from Brooktree that provides video decoder functionality.

It is supported under Linux by the bttv kernel driver module.

Overview/Features

The Bt848 chip was used by many analog cards produced in the mid 1990's; which collectively help constitute the Bttv devices categorization.

Both the Bt848A and Bt849A chip variations included all the features of Bt848 while adding support for a few more functions (summarized in the table below).

Bt848 video decoder family comparison
Featured Bt848 Bt848A Bt849A
Composite, S-Video multi-standard Video Decoder
and PCI bus master
Yes Yes Yes
Peaking, single crystal operation, &
digital camera support
- Yes Yes
WST (European encoding for Teletext) decoding support - - Yes

The Bt848 would also become the basis for several other successive decoder chipsets, beginning with the Brooktree Bt878; which themselves would also prove to be widely utilized.

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