Text, Sound And Images
Bayani Gaba-gaba
Everything a computer stores, every essay, song and photograph, is held as nothing but ones and zeros. So how does a string of bits become the letter A, a drum beat, or a sunset? The answer is a set of clever, fixed rules for turning each kind of media into binary, and back again.
In this lesson you will see exactly how character sets like ASCII and Unicode encode text, how sampling captures sound, and how a grid of pixels stores an image. You will also learn the two dials, sample rate and resolution for sound, resolution and colour depth for images, that trade quality against file size, and you will calculate those file sizes yourself.
Manufura
- 1 Understand how and why a computer represents text and the use of character sets, including American standard code for information interchange (ASCII) and Unicode
- 2 Understand how and why a computer represents sound, including the effects of the sample rate and sample resolution
- 3 Understand how and why a computer represents an image, including the effects of the resolution and colour depth
Darasin Sauti
Saurari wannan darasi a cikin manhaja
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Text, Sound And Images. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- How many different characters can a 7-bit ASCII code represent? A. 7 B. 64 C. 128 D. 256 Answer: C
- Which change increases the quality of a sound recording? A. lowering the sample rate B. increasing the sample resolution C. reducing the colour depth D. removing metadata Answer: B
- An image is 200 by 100 pixels with a colour depth of 8 bits. Its size in bits is: A. 2000 B. 20000 C. 160000 D. 1280000 Answer: C
- Why was Unicode created? A. to make files smaller B. to represent characters from many world languages C. to replace binary D. to remove the need for a character set Answer: B
- What does the colour depth of an image describe? A. the number of pixels in the image B. the width of the image C. the number of bits used per pixel D. the file format Answer: C
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Machine-Level Information Representation
"Introduction to Computer Science: Machine-Level Information Representation" by OpenStax, OpenStax, Rice University, licensed under CC BY-NC-SA 4.0 (https://creativecommons.org/licenses/by-nc-sa/4.0/). Source: https://openstax.org/books/introduction-computer-science/pages/5-3-machine-level-information-representation. Access for free at https://openstax.org/books/introduction-computer-science/pages/1-introduction
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Yi Aikin Tambayoyin Gwaji
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Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
