bruce7806 wrote:
1440X1080 是屬於1080i....不是1080P喔
這規格通常是因為HDV用帶式錄影時受限於帶寬
將原本的1920視頻壓縮成1440X1080
...(恕刪)
HDV也有不少可錄Progressive視訊的機種,"1440x1080是屬於1080i"的說法不太正確。
馬克斯吉納斯 wrote:mudada wrote:
如果fullHD的定義,是要求原生訊號的匹配~~現在主流的說法是 1920x1080/60 fps,很可惜,就算是藍光的24fps對應(不過應該算是最沒有bug的對應了~ 重複輸出fullHD全對應畫面衝到一秒60張),也不能算是真正的 fullHD.
樓上你最後的結論我看不懂!
...(恕刪)
看不懂 and 不同意 +1,嚴格說來,Full HD才是沒有被嚴格定義、被濫用的行銷術語,何來一定要是60p的"主流"說法?
1080"p"代表的Progressive是視訊本身相對於Interlaced的一種特性,不必然要跟特定frame rate綁在一起。
ycweng wrote:
HDV也有不少可錄...(恕刪)
看不懂 and 不同意 +1,嚴格說來,Full HD才是沒有被嚴格定義、被濫用的行銷術語,何來一定要是60p的"主流"說法?
1080"p"代表的Progressive是視訊本身相對於Interlaced的一種特性,不必然要跟特定frame rate綁在一起
Full HD是沒有被嚴格定義,這點沒錯.但有沒有所謂的"主流"說法,這點不能完全被否定
1080"p"並沒有跟特定的frame rate綁在一起,這也是正確的.問題是 我們的平面顯示器 偏偏就跟特定的frame rate綁在一起
1920x1080 ,60Hz的面板,一秒鐘就是要顯示60 張解析度1920x1080 frames,才是完全對應.
你的片源是1080i 60Hz,我們看到的視訊就有一半是算出來的,1080p 24fps的訊源.就有36張的訊號是算出來的
這是顯示器的規格,你沒法改變的.不管是motion flow或者是插黑,去交錯,倍頻.算的好不好各顯神通,但就是非對應原生的規格.如果是120Hz的面板,用計算出來的資料量當然更大,要更強的倍頻晶片.
當然 消費者如果接受這個事實,也沒關係.
相對於1080p,數位廣播已經可以對應到720p/60or50 fps 這種跟平面顯示器頻率完全匹配的訊號,不需要倍頻晶片就可以順利播放(有興趣的話請參照原帖中的連結)就這點來說,720P"家族"的規格相對的成熟許多
以下連結是Full HD 的wiki
http://en.wikipedia.org/wiki/Full_hd
節錄其中一小段
Production standards
The movie industry has embraced 1080p24 as a mastering format in both native 24p form and in 24PsF form. This may be the first universal video standard which transcends continental boundaries. This is an area previously reserved for film.
A new high-definition progressive scan format is not available for picture creation, but is currently being developed to operate at 1080p at 50 or 60 frames per second. This format will require a whole new range of studio equipment including cameras, storage, edit and contribution links (such as Dual-link HD-SDI and 3G-SDI) as it has doubled the data rate of current 50 or 60 fields interlaced 1920 × 1080 from 1.485 Gbit/s to nominally 3 Gbit/s. It is unable to be broadcast in a compressed transmission to legacy MPEG-2 based HD receivers. This format will improve final pictures because of the benefits of "oversampling" and removal of interlacing artifacts.
其中1080p24相對應的是電影膠捲的規格,因為是frame base,所以跟平面顯示器的特性相容度高,不用去交錯,處理成 60Hz(or 50Hz)的1080P相對容易而且不會有破綻
1080p/50(for Pal)60(for NTSC) 對應的都是電視訊號的規格.現在應該還沒有這種廣播視訊可以看
mudada wrote:
.問題是 我們的平面顯示器 偏偏就跟特定的frame rate綁在一起
1920x1080 ,60Hz的面板,一秒鐘就是要顯示60 張解析度1920x1080 frames,才是完全對應.
...(恕刪)
不....對於1080i的面板,是一秒60個field(1920x540),不是60個frame....
mudada wrote:
你的片源是1080i 60Hz,我們看到的視訊就有一半是算出來的,1080p 24fps的訊源.就有36張的訊號是算出來的
...(恕刪)
您這邊談到的都是post-processing,並非訊源本身品質達到p60的境界。
mudada wrote:
相對於1080p,數位廣播已經可以對應到720p/60or50 fps 這種跟平面顯示器頻率完全匹配的訊號,不需要倍頻晶片就可以順利播放(有興趣的話請參照原帖中的連結)就這點來說,720P"家族"的規格相對的成熟許多
...(恕刪)
720P的部分較無爭議,day 1便是如此....
mudada wrote:
以下連結是Full HD 的wiki
http://en.wikipedia.org/wiki/Full_hd
節錄其中一小段
Production standards
The movie industry has embraced 1080p24 as a mastering format in both native 24p form and in 24PsF form. This may be the first universal video standard which transcends continental boundaries. This is an area previously reserved for film.
A new high-definition progressive scan format is not available for picture creation, but is currently being developed to operate at 1080p at 50 or 60 frames per second. This format will require a whole new range of studio equipment including cameras, storage, edit and contribution links (such as Dual-link HD-SDI and 3G-SDI) as it has doubled the data rate of current 50 or 60 fields interlaced 1920 × 1080 from 1.485 Gbit/s to nominally 3 Gbit/s. It is unable to be broadcast in a compressed transmission to legacy MPEG-2 based HD receivers. This format will improve final pictures because of the benefits of "oversampling" and removal of interlacing artifacts.
其中1080p24相對應的是電影膠捲的規格,因為是frame base,所以跟平面顯示器的特性相容度高,不用去交錯,處理成 60Hz(or 50Hz)的1080P相對容易而且不會有破綻
1080p/50(for Pal)60(for NTSC) 對應的都是電視訊號的規格.現在應該還沒有這種廣播視訊可以看
...(恕刪)
不論1080p24怎麼被"處理"成p60,都不會比直接24Hz、48Hz、72Hz或甚至120Hz播放自然,但這是題外話了...目前雖然有1080p60的訊源技術在發展,但回到最原先的課題,目前絕對還不到講死Full HD = 1080p60的時候,Full HD這個行銷名詞,談的是spatial的解析度,而非必然temporal frame rate必須是60fps。