Kadar bidang: Perbezaan antara semakan

'''Kadar bidang''' atau '''kadar bingkai''', ialah [[kekerapan]] sesebuah peranti imejan menghasilkan turutan imej unik yang dipanggil [[Bidang filem|bidang (atau bingkai)]]. Istilah ini digunakan sama-rata bagi [[grafik komputer]], [[kamera video]], kamera [[filem]], dan sistem [[motion capture]]. Kadar bidang biasanya dinyatakan dalam bidang sesaat (FPS), tetapi juga diungkapkan dalam [[hertz]] bagi monitor [[imbasan progresif]].

 

 

Pada tahun 2011, terdapat tiga piawaian kadar bidang utama dalam perusahaan [[televisyen]] dan [[perfileman]], iaitu: 24p, 25p, dan 30p; tetapi tidak lupa juga banyak variasinya serta piawaian-piawaian terbaru.

*'''50i''' (50 interlaced fields = 25 frames) is an [[Interlaced video|interlaced]] format and is the standard video field rate per second for [[PAL]] and [[SECAM]] television.

 

 

* '''50p'''/'''60p''' is a [[Progressive scan|progressive]] format and is used in high-end HDTV systems. While it is not technically part of the [[ATSC]] or [[Digital Video Broadcasting|DVB]] broadcast standards, it is rapidly gaining ground in the areas of set-top boxes and video recordings.{{Citation needed|date=January 2008}}

* '''72p''' is a [[Progressive scan|progressive]] format and is currently in experimental stages. Major institutions such as [[Snell]] have demonstrated 720p72 pictures as a result of earlier [[Analog television|analogue]] experiments, where 768 line television at 75 FPS looked subjectively better than 1150 line 50 FPS progressive pictures with higher [[shutter]] speeds available (and a corresponding lower [[Bit rate|data rate]]).<ref>[http://www.hdmasters2007.com/pdf/Presentations/HDM2007_Snell-SnellWilcox.pdf Snell & Willcox]</ref> Modern cameras such as the [[Red Digital Cinema Camera Company|Red]] can use this frame rate to produce [[slow motion]] replays at 24 FPS. [[Douglas Trumbull]], who undertook experiments with different frame rates that led to the [[Showscan]] film format, found that 72 FPS was the maximum frame rate at which emotional impact peaked for viewers.<ref>[http://my.nero.com/index.php?__path=Blog%3A%2F%2FDisplayBlogComposite%2FIanFarquhar%2F7100886&NCSS=a102dsQnAaeJ3yXRKhMFVUGvD6zL1ENGRmnd Trumball]</ref> 72 FPS is the maximum rate available in the WMV video file format.-->

 

'''Kadar bingkai''' juga digunakan dalam [[pengkomputeran masa nyata]]. Dalam gaya yang agak serupa dengan takrifan filem di atas, satu ''bingkai'' masa nyata ialah masa yang diambil untuk melengkapkan sepusingan penuh tugasan-tugasan pemprosesan sistem. Jika kadar bingkai sistem masa nyata ialah 60 [[hertz]], maka sistem itu menilai semula segala input yang perlu sambil mengemas kini output yang perlu 60 kali sesaat dalam apa jua keadaan.

 

 

 

 

{{Reflist}}

 

* [http://spng.se/frame-rate-test/ Frame Rate Test Video Files]

* [http://www.cinemaweb.com/silentfilm/bookshelf/18_kb_2.htm Silent Films: What Was the Right Speed]

 

{{DEFAULTSORT:Frame Rate}}

 

[[ar:معدل أطر]]

[[da:FPS]]

[[de:Bildwiederholfrequenz]]

[[en:Frame rate]]

[[es:Imágenes por segundo]]

[[fr:Images par seconde]]

[[ko:프레임 레이트]]

[[it:Frequenza dei fotogrammi]]

[[nl:Beelden per seconde]]

[[ru:Кадровая частота]]

[[sq:Frekuenca vizuale]]

[[fi:Kuvataajuus]]

[[sv:Frames per second]]