
Camera interfaces
GUPPY Technical Manual
V4.0.1
120
Pixel data
Pixel data are transmitted as isochronous data packets in accordance with
the 1394 interface described in IIDC V1.3. The first packet of a frame is iden-
tified by the
1
in the sync bit (sy) of the packet header.
The video data for each pixel are output in 8-bit format. Each pixel has a
range of 256 shades of gray. The digital value 0 is black and 255 is white.
The following table provides a description of the video data format for the
different modes. (Source: IIDC V1.3.1 specification)
Figure 55: Isochronous data block packet format: Source: IIDC V1.3
Figure 56: YUV 4:2:2 and YUV 4:1:1 format: Source: IIDC V1.3