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72 Chapter 5: Matrox Meteor-II hardware reference
The Matrox Meteor-II MJPEG module supports lossy
compression of RGB 8:8:8 and YUV 4:2:2 standard video, in
continuous mode. The module also supports lossy and lossless
compression of 8-bit monochrome images.
❖10- and 12-bit lossless compression is supported on the
PCI/CompactPCI version only.
Color Space Converter The Color Space Converter has two functions. During
compression, it converts the incoming data for the JPEG
processor; the data is reformatted from raster format into 8 x 8
pixel blocks and then passed back to the JPEG processor. The
Color Space Converter’s second function is to convert RGB data
into YUV format in order to reduce the processing time and the
amount of data for compression.
During decompression, the 8 x 8 pixel blocks are reformatted
into raster format, and in the case of RGB data, the Color Space
Converter reconverts the compressed YUV data into RGB data.
FPGA
PixelData
Input/Output
VIA SGRAM
InterfacePort
Block
Data
Pixel
Interface
Host
Interface
Code
Interface
Host
Interface
JPEG
Processor
Interface
Memory
Port
MJPEG Module
Host
Interface
Strip Buffer
Memory
8
8
8
16
SRAM
(64Kbytes)
Color Space
Converter
JPEG
Processor
Meteor-II
Grab Port
Interface
MJPEG
24
Progressive
Path
24
8
64