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).
| 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.