Jserv's blog

VC-1 標準確立

Embedded.com 的新聞 [VC-1 standard finally arrives] 一開頭就提到：

after two years of suspense worthy of a Hitchcock movie, the Society of Motion Picture and Television Engineers (SMPTE) has released complete specifications for the VC-1 video compression standard.

SMPTE 終於完成 VC-1 視覺編碼標準，這也是 Microsoft WMV9 的基礎演算法，而 "after two years of suspense worthy of a Hitchcock movie" 就將這兩年的等待比喻為英國緊張電影大師 Alfred Hitchcock 的製作歷程。就最近使用於多媒體應用的 video coding 方式來說，H.264、VC-1，以及中國的 AVS1.0 提案都熱烈地被比較與實做，據 TI 的 Ajit Rao 表示：

TI's Rao, in comparing VC-1 and AVS1.0 with H.264, said that "VC-1 achieves a compression ratio similar to H.264 but at lower complexity." In contrast, China’s AVS1.0, while similarly reducing the complexity compared to H.264, "loses a little in compression efficiency," he added.

Rao said that when compared to the H.264 Main Profile, China’s AVS1.0 is "about 0.3 dB worse in average for progressive sequences" and "up to 1.2 dB worse for interlaced sequences." China, however, is currently defining a new profile in AVS1.0 to resolve such quality issues, he added.

由此可見，無論是 IP-TV 或者中階多媒體應用而言，VC-1 video coding 是很有競爭性的演算法，特別是標準已經確立的今日。
由 jserv 發表於 April 9, 2006 02:36 PM