The HDV Sweet Spot
VideoSystems By Steve Mullen Sep 1, 2004 The second in a pair of articles about the future of HDV examines the inherent advantages of the 720p30 format. NLE playback performance is based on the number of pixels in an MPEG-2 frame. Table 1 shows these values for 720p30 and 1080i30 video  and also for 720p60, were it to become available. 
The temporal resolution of the 720p30 format offers something close to a film look, and progressive scanning also offers more real-world resolution than the numbers suggest. Simply put, with 1080i30 video, every MPEG-2 decode will require either nearly twice the computing power or nearly twice the time  or some increase in both. Do we have this much computer power or time? Last month we examined situations that may arise when the second wave of HDV equipment arrives. The coming 1080i camcorders, in particular those from Sony, have been the subject of intense speculation  especially their price and arrival date. The big impact of 1080i will, surprisingly, be felt when we edit 1080i. read more...
The temporal resolution of the 720p30 format offers something close to a film look, and progressive scanning also offers more real-world resolution than the numbers suggest. Simply put, with 1080i30 video, every MPEG-2 decode will require either nearly twice the computing power or nearly twice the time  or some increase in both. Do we have this much computer power or time? Last month we examined situations that may arise when the second wave of HDV equipment arrives. The coming 1080i camcorders, in particular those from Sony, have been the subject of intense speculation  especially their price and arrival date. The big impact of 1080i will, surprisingly, be felt when we edit 1080i. read more...
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