Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Anonymous
Anonymous asked in 電腦與網際網路其他:電腦 · 1 decade ago

計算機大意的問題)此影像為應佔多少記憶體容量?(請高手賜教

這兩題我算不出來 /> _<\\ Help me , please .

●某數位相機的影像為1600×1200且每像素為24Bits,

其壓縮比為20倍,此影像應佔多少記憶體容量?﹝答為:A﹞

(A)288KBytes   (B)576KBytes  (C)2.88MBytes  (D)5.76MBytes

我的問題:什麼是壓縮比20倍?並求此題算法過程 。謝謝

_________________________________________________________

●若以取樣頻率44.1KHz,16位元的音效卡錄製一分鐘雙聲道

立體聲音,則大約需要多少MB(MegaBytes)的記憶體空間? ﹝答為B﹞

(A)100MB  (B)10.584MB   (C)84.672MB  (D)5.292MB

我的問題:我算不出這個答案 

我腦袋想到的算法↓

44.1KHz× 16Bites×2聲道=1141.2 Bites

哪裡錯了 ? ~"~

求此題過程算法,謝謝你。

1 Answer

Rating
  • 1 decade ago
    Favorite Answer

    1 .

    ( 1600 * 1200 *3 ) / 20 = 288000 = 288KBytes

    *3 是因為24bits = 3 bytes

    / 20 是因為壓縮比是20

    壓縮比就是 , "沒壓縮前的size" 和 "壓縮後的size" 的比值

    2.

    44100 * 2 * 60 * 2 = 10584000 = 10.584MB  

    第一個 *2是因為16bits = 2 bytes

    第二個 *60 是因為一分鐘

    第三個 *2是因為雙聲道

    2006-10-26 01:06:33 補充:

    取樣頻率44.1KHz表示每秒取樣44100次所以一分鐘要 *60

    Source(s): myself
Still have questions? Get your answers by asking now.