JVC Professional APRIL 2007 NAB-2007 The ProHD Report
Copyright 2007 JVC Professional Products Company All rights reserved Page 36 of 43
Fig. 19. The graph shows that the full HD quality of the ATSC
transmission really only takes advantage of about 50% of the total
available Pixels/Second in a RGB native 1280x720p60 display. It really
confirms the viewing tests that 1280x720 resolution displays are more
than sufficient to provide the large majority of home viewers with the
best possible perceived HD viewing experience, whether the source is
720p or 1080i.
The JVC ProHD Camcorder, with native acquisition and delivery to TV station
matching the full ATSC bandwidth (1280x720p60) and 4:2:0 pixel for pixel, will
not degrade the pixels/sec benchmark from a pixel conversion point of view,
delivering 83 million pixels/sec, although we must recognize that the 1/3-inch
imager block and the ProHD CODEC will not reach the HD image quality or
accuracy of the uncompressed HD studio camera output.
A Panasonic DVCPRO-HD Camcorder, delivering to the TV station through the
DVCPRO-HD format 960x720p60, requires large amounts of pixel conversions due
to the 960 luminance and 480 chrominance horizontal bandwidth limitations:
960x720p60 x 2 = 83 million pixels/sec (no Kell/I reduction, progressive)
Luminance 960x720p60 = 41.5 million pixels/sec
Chrominance 480x720p60 x 2 = 41.5 million pixels/sec