加载中…
正文 字体大小:

Wellcore high performance CF Card with 1100X

(2013-07-01 11:35:03)
标签:

ipc

ssd

工业电脑

slrcamera

dv

分类: SSD
High-speed camera of application area is wide, species also many, such as photography lovers using of SLR camera, industrial area using of high-speed camera. This class camera of features is HD, high-speed, in each seconds species needs shooting several update to hundred update, some subtle area do slice analysis Shi occasions even needed each seconds thousands of update HD pictures, then test of just machine phase sensor, shutter speed of problem has, camera of storage is a large problem, are using in camera of storage card basically is SD card, CF card,. Now to explain the areas of performance and application of SD card and CF card, SD card, mainly is the application in the high speed and capacity requirements are not used in a camera of some consumer groups, now better SD card basically SD2.0 protocol specification, maximum CLASS 10 speed rating, 10MB/s speed. This speed is sufficient for typical single shot camera, why would you say that, following to analyze images pixel relation with storage transfer speed, for example is 10 million pixels camera, take a photo the capacity for: 10000000pixel*24bit/8byte=30000000 Byte/1024/1024=28.61MB, this is the camera effective pixels out of the theory, such as the capacity to store, That took a update photo by needed time for 28.61MB/10MB/S=2.861 seconds, so long of storage time, easy appeared Caton of phenomenon, actually camera of processor in put photo save to SD card Shi will for pictures compression, pictures format General is JEPG, according to JEPG of agreement specification to calculation, it of compression than in 10:1 to 40:1 Zhijian, certainly compression than more large pictures quality on more poor, we on by 10:1 of compression than to calculation single update photo by needed of storage space, 28.61MB/10=2.861MB. This leaflet with the size of 2.861MB/10M/S=0.2861 seconds, this time a lot shorter than finger pressing the shutter, even if the camera does not appear in a row cotton. If SD card with in high-speed SLR phase will is how of effect does, we continues to analysis, such as SLR camera Canon EOS-1Ds, it of pixel maximum has 16.7 million, burst speed 4 update/seconds, that it in 1 seconds within by took photo by accounted for space for: 16.7 million *24bit*/8byte*4 update =191.1MB, original data not compression if according to SD card of maximum speed 10MB/S to calculation, that it needs 19.11 seconds to storage finished this a group photo, And SLR camera 1 second of time needed considerably, cannot, of course, continuous shooting, even with a JEPG compression 10:1, 1.911 seconds, or greater than the response time of the 1S, so SD card when shooting HD SLR is limited. So to how to reached HD burst of effect does, without worried, SLR camera General also has a CF card interface, now on to describes CF card why can competent this difficult of task, first describes about CF card of performance, CF Association has launched CF6.0 agreement, speed can reached 167MB/S, is usually by said of 1100X, capacity also can do maximum 256GB, this high-end products in market Shang has has sales, author has measured try had brand WELLCORE model for: W30PCFSI-064 of CF card, this card is used SLC Flash, capacity for 64GB, measured speed for read 165MB/S, wrote 150M/S, according to products official website www.wellcore-tech.com describes said this is industrial level wide temperature products, can in-40 ℃ ~85 ℃  work, when you of camera needed in hot of environment in the or cold of North application , this paragraph CF card can played real of role, So for general photography lovers for selection this class CF card is a is good of select, now on to described why CF card can competent high-speed camera of application, just refers to SD card in burst by needed time for 1.911 seconds, CF card speed is 167MB/S, SD card is 10MB/S, that is CF card of speed than SD card fast 16.7 times times, this but a welcome of speed upgrade Oh, such calculation down 4 update/seconds burst by needed storage time for 1.911 seconds/16.7= About 0.11 seconds, far less than the required time of 1 second, so your high-end camera worthy of your own ways. For professional photography love who for, selection CF card more than in speed , in stability also to focused on consider, this is from CF card of constructed said up, CF card is COMPACT FLASH of abbreviation, internal using known of NAND FLASH Flash, but Flash is has wrote life of, NAND FLASH is divided into MLC,SLC, certainly also has quality almost of TLC, generally CF card only with MLC and SLC, quality poor of CF card will with TLC also hardly, This is the cost, not discussed here, on the life of the FLASH, SLC is 100000 P/E CYCEL; MLC between 5000-10000 P/E CYCLE, now a new process of MLC FLASH is basically in 3000P/E, TLC they can reach 1000 P/E CYCLE you are very good, the P/E CYCLE has anything to do with the life of the CF card, now to explain in detail, with SLC 100000 P/E CYCLE as an example, if taken with a camera a daily average over 3,000 photos, Photo of capacity for 3,000 a day double *4.75MB/=14.25GB, total 32GB for the CF card, so how long is this card can use it, now to calculate it, probably because the actual capacity CF card 32GB to 28GB, according to the formula: 100000P/E/14.25GB/day/28GB/365 day/WA5=108 year, 108 years for such a long time is life of CF cards is not a problem, such as using MLC 3,000 P/E of FLASH,CF card of life will is how many does, calculation about: 3000P/E/14.25GB/days/28GB/365 days/WA5=3.25 years, such on CF card of life effect on is large has, then a update such of CF card on only with 3 years around has. so for read and write comparison frequently of user, in purchase CF card , best selection SLC of products, such CF card of using life and stability are can are guarantees.
Wellcore <wbr>high <wbr>performance <wbr>CF <wbr>Card <wbr>with <wbr>1100X

0

阅读 评论 收藏 转载 喜欢 打印举报
  • 评论加载中,请稍候...
发评论

       

    验证码: 请点击后输入验证码 收听验证码

    发评论

    以上网友发言只代表其个人观点,不代表新浪网的观点或立场。

      

    新浪BLOG意见反馈留言板 不良信息反馈 电话:4006900000 提示音后按1键(按当地市话标准计费) 欢迎批评指正

    新浪简介 | About Sina | 广告服务 | 联系我们 | 招聘信息 | 网站律师 | SINA English | 会员注册 | 产品答疑

    新浪公司 版权所有