soarprod
04-08-2005, 05:06 PM
from the DMN article:
"What about dropouts on the HDV format? Is it any different than DV?
Walton: In the HDV progressive system we are using the same track layout as the DV format. There are 10 tracks per frame on DV and each track has an area for video data, audio, and subcode. With HDV , the tape speed is the same, but frames are grouped in to groups of six. Since it’s a six frame GOP, instead of using 10 tracks per frame we’re using 60 tracks per GOP. Critical data is interleaved throughout the entire GOP, so if you had a dropout somewhere—a defect in the tape or piece of dust—the recovery data is more likely not to be affected, and therefore you won’t see a defect in the recording. So, the actual dropout performance of HDV is superior to DV. It’s more robust. "
-Phil
"What about dropouts on the HDV format? Is it any different than DV?
Walton: In the HDV progressive system we are using the same track layout as the DV format. There are 10 tracks per frame on DV and each track has an area for video data, audio, and subcode. With HDV , the tape speed is the same, but frames are grouped in to groups of six. Since it’s a six frame GOP, instead of using 10 tracks per frame we’re using 60 tracks per GOP. Critical data is interleaved throughout the entire GOP, so if you had a dropout somewhere—a defect in the tape or piece of dust—the recovery data is more likely not to be affected, and therefore you won’t see a defect in the recording. So, the actual dropout performance of HDV is superior to DV. It’s more robust. "
-Phil