Bitfield H.261 Video Compression Board
This is a brief description of the board.
A full technical
specification is available from the supplier.
The card is a full length PC/AT-board, and can be used in machines
with an ISA or EISA bus.
The card is controlled from software, and most settings can be
adjusted at any time (PAL or NTSC is set at startup). The card can
also display overlays, and it's possible to grab images directly from
the board or put images onto the board (the display memory consist of
one luminace bank (Y) and two color-difference banks (CB, CR)).
- Coding algorithm:
- CCITT H.261
- Video format:
- NTSC or PAL
- Frame rate:
- NTSC 7.5, 10, 15, 30 frames/s
- PAL 6.25, 8.33, 12.5, 25 frames/s
- CIF (352x288)
- QCIF (176x144)
- Data rate:
- 0 - 2048 kbps
- Video inputs:
- 1. composite or Y/C
- 2. composite
- Video output:
- composite, Y/C or RGB
- G.711 (PCM), 64 or 56 kbps, 3.5 KHZ
- 7 KHZ optional daughter board
The price in April 1995 was about US$5000 for the basic card with G.711
audio. The optional motion estimation daughter board was a further
Contact Bitfield Oy for latest
specifications and fuller details.