Streaming Media - June/July 2008 - (Page 61) Table 4 - Processor Utilization During SD File Playback on Specified Computers Dell Latitude 1600MHz Pentium 64%–88% 43%–80% 72%–95% N/A HP xw4100 3.0GHz Pentium 4 With HT Tech. 13%–25% 19%–30% 22%–28% 21%–35% MacBook Pro 2.4GHz Core 2 Duo 18%–29% 12%–19% 20%–35% 21%–31% Dell Precision 390 3.0GHz Core 2 Duo 8%–12% 4%–8% 8%–18% 7%–13% SD Tests H.264—Main—tricked-out (QT Player) H.264—Baseline (QT Player) FLV (FLV Player) WMV (WMP) Note that the notebook no longer plays Windows Media files because of a software conflict I can’t resolve. Table 5 - Processor Utilization During HD File Playback on Specified Computers Dell Latitude 1600MHz Pentium 100% 100% 100% N/A HP xw4100 M3.0GHz Pentium 4 With HT Tech. 55%-69% 65%-79% 49%–54% 27%–46% MacBook Pro 2.4GHz Core 2 Duo 42%-48% 29%-42% 48%–60% 35%–45% Dell Precision 390 3.0GHz Core 2 Duo 31%–40% 22%–26% 38%–54% 15%–25% HD Tests H.264—Main—tricked-out (QT Player) H.264—Baseline (QT Player) FLV (FLV Player) WMV (WMP) Note that the notebook no longer plays Windows Media files because of a software conflict I can’t resolve. given the high playback demands of video encoded using the Main Profile, I’m not sure I would recommend that approach even if quality were noticeably better. This is shown in Table 5. Where SD H.264 playback was relatively trivial for the three most relevant computers—the xw4100, MacBook Pro, and Precision 390—HD playback was clearly a strain, and using the Main Profile significantly boosted the CPU horsepower required to play the file. That said, on the xw4100, playing back the file created with the Baseline Profile required more CPU cycles. WWW.STREAMINGMEDIA.COM 61 http://us.ntt.net/scd http://us.ntt.net/scd http://WWW.STREAMINGMEDIA.COM
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