Option 1
1. Information about the graphic image is formed in the video memory:
1) Central processing unit,
2) GPU,
3) Graphics adapter,
4) Display processor.
2. Among the very first graphic information models should include:
1) Rock paintings
2) Books with illustrations
3) Maps of the Earth's surface
3. Primitives in a graphics editor are:
1) Mode of operation graphic editor
2) Operations performed on files containing images
3) Figures created in a graphics editor
4) The simplest shapes that are drawn using special tools of the graphic editor
4. Graphics with the representation of the image in the form of sets of points:
1) Fractal
2) Raster
3) Vector
4) linear
5. Splitting a sound wave into separate time sections:
1) Amplitude
2) Frequency
3) Discretization
4) quantization
6.
Audio coding depth is the amount… that is required for… discrete volume levels of… sound.
1) Information, coding, digital
2) Data, transformation, digital
3) Information, coding, analog
4) Information, transformation, digital
7. The sound volume level is 65536. What is the coding depth?
8. To obtain high-quality audio digitization, 20-bit signal coding is used. Calculate how much space will take up one minute of digital audio on any digital media recorded at 44.1 kHz.
9. Calculate the volume of a stereo audio file that is 20 seconds long with 16-bit encoding and 32 kHz sampling rate. (present the answer in megabytes as a decimal fraction, no more than two decimal places)
10. What is the encoding depth if a stereo audio file with a playback duration of 1 min and a recording rate of 32 kHz takes about 3.66 MB of memory?
11. For storage bitmap size 640 480 pixels without compression allocated 300 KB of memory. What is the maximum possible number of colors in the image palette?
12. The graphic display operates in 640 mode400 pixels with 4 colors. What should be the amount of video memory in kilobytes?
13. Fill the table:
14. Fill in the blanks in the proposals:
The coding quality depends on the number of measurements of the signal level per unit of time, ie ....
The more the number of measurements is made in one second (the higher the sampling rate), the more accurate the procedure….
Final test on this topic
"Coding of graphic and audio information". Grade 9.
Option 2
1. A pixel on a color display screen is:
1) A set of three grains of phosphor
2) Phosphor grains
3) Electron beam
4) Imaginary screen point
2. Fill in the blanks in the proposal:
The contents of the video memory are continuously monitored ... and displayed ... on the screen.
1) Display processor, central processing unit
2) central processing unit, display processor
3) Display processor, display processor
4) central processing unit, graphics adapter
3. The video memory page is 16000 bytes. Display works in 320 mode400 pixels. How many colors are in the palette?
4. To store a 256-color image, one pixel is allocated for encoding:
5. The amount of information required to encode discrete loudness levels of digital sound is called:
1) Quantization
2) Discretization
3) Coding depth
4) fragmentation
6. Fill in the blanks in the proposal.
At the heart of ... sound with the use of a computer lies the process ... of vibrations of air into vibrations of an electric current and the subsequent ... of an analog electrical signal.
1) Encoding, transformation, sampling
2) Conversion, encoding, sampling
3) Quantization, transformation, sampling
4) Encoding, transforming, quantizing
7. What is the sound volume level if the encoding depth is 16 bits
8. To obtain high-quality audio digitization, 16-bit signal coding is used. Calculate how much space will take one minute of digital audio on any digital media recorded at 11 kHz.
1) 10 MB
3) 1.3 MB
9. Calculate the volume of a stereo audio file with a length of 10 seconds with 16-bit encoding and a sampling rate of 32 kHz. (present the answer in megabytes as a decimal fraction, no more than two decimal places)
10. What is the encoding depth if a mono audio file with a playback duration of 1 min and a recording rate of 32 kHz takes up 3.66 MB?
11. To store a 64 × 64 pixel bitmap, 1.5 kilobytes of memory were allocated. What is the maximum possible number of colors in the palette?
12. Specify the minimum amount of memory (in kilobytes) that is sufficient to store any 256 × 256 pixel bitmap image, if the image is known to use a palette of 216 colors.
13. Fill the table:
14. Fill in the blanks in the proposals.
In order for the computer to be able to process sound, continuous sound signal must be converted to ... discrete form using time sampling.
A continuous sound wave is divided into separate small time sections, for each such section a certain amount of ... sound is set. This process is called ... sound.
Option 1.
As the smallest unit of information measurement, it is accepted ...
What is 1 byte?
A raster graphic file contains black and white (no grayscale) with a size of 100x100 pixels. What is the information volume of this file? (in bits)
A raster file containing a black and white (no grayscale) square image has a size of 200 bytes. Calculate the size of the side of the square (in pixels).
Determine the required amount of video memory, if the screen size of the monitor is 640x480, the color depth is 24 bits.
In the process of converting a bitmap graphic image, the number of colors decreased from 65536 to 16. How many times will the amount of memory occupied by it decrease.
It is known that the video memory of a computer has a volume of 512 KB. The screen resolution is 640 by 200 pixels. How many screen pages will fit in video memory at the same time with a palette of 8 colors
Option 2.
The largest unit of information measurement is ...
What is 1 Megabyte?
A raster graphic file contains black and white (no grayscale) with a size of 10x10 pixels. What is the information volume of this file? (in bits)
A raster file containing a black and white (no grayscale) square image has a size of 400 bytes. Calculate the size of the side of the square (in pixels).
Determine the required amount of video memory, if the screen size of the monitor is 800x600, the color depth is 16 bit.
To store a raster image with a size of 128x128 pixels, 4 KB of memory were allocated. What is the maximum possible number of colors in the image palette.
How much video memory is needed to store four pages of an image if the bit depth is 24 and the display resolution is 800x600 pixels. (In MB)
In the process of converting a bitmap graphic image, the number of colors decreased from 65536 to 256. How many times the amount of memory occupied by it will decrease.
It is known that the video memory of a computer has a volume of 512 KB. The screen resolution is 640 by 200 pixels. How many screen pages will fit in video memory at the same time with a palette of 16 colors
Answers.
Option 1.
Bit
8 bit.
10000 bit
40x40
7372800 bits = 921600B = 900KB
N=4
4 times
Solution: 640x200x3 = 384000bit - 1 page
4194304bit / 384000bit = 10.9 pages
Option 2.
1 TB
1 MB = 1024KB = 1048576B = 8388608bit
100bit
400B = 400 * 8 = 3200bit, 56.6x56.6
800x600x16 = 480,000 bits = 60,000 bytes = 58.6 KB
N=4
5.5 MB storage 4 pages
65536=2 16 ,256=2 8 ; 16/8 = 2 times
Solution: 640х200х4 = 512000bit - 1 page
512KB = 512x1024x8 = 4194304bit
4194304bit / 512000bit = 8.19pages
There are examples with a solution.
Test on the topic: "Coding and processing graphic information»Option 1 1. One of the main functions of the graphic editor is: 1) image scaling; 2) storage of the image code; 3) creating images; 4) viewing and displaying the contents of the video memory. 2. The elementary object used in the raster graphics editor is: 1) point (pixel); 2) an object (rectangle, circle, etc.); 3) a palette of colors; 4) familiarity (symbol) 3. The grid of horizontal and vertical columns, which is formed by pixels on the screen, is called: 1) video memory; 2) video adapter; 3) raster; 4) display processor; 4. Graphics with the representation of an image in the form of a set of objects is called: 1) fractal; 2) raster; 3) vector; 4) straightforward. 5. A pixel on the display screen is: 1) the minimum area of the image, which can be independently assigned a color; 2) binary code of graphic information; 3) an electron beam; 4) a set of 16 phosphor grains. 6. Video controller is: 1) display processor; 2) a program that distributes video memory resources; 3) an electronic volatile device for storing information about a graphic image; 4) device, work manager graphic display. 7 .... 1 2 3 4 5 6 7 8 Option 1 c a c c a d b b Option 2 b c b a d a b c
Test on the topic: "Coding and processing of graphic information"
Option 1
scaling images;
storing the image code;
creation of images;
viewing and displaying the contents of video memory.
point (pixel);
object (rectangle, circle, etc.);
Color palette;
familiarity (symbol)
One of the main functions of the graphics editor is:
The elementary object used in the raster graphics editor is:
The grid of horizontal and vertical columns, which is formed by pixels on the screen, is called:
display processor;
video memory;
video adapter;
Graphics with the representation of an image in the form of a collection of objects is called:
fractal;
raster;
vector;
straightforward.
the minimum area of the image, which can be independently assigned a color;
binary code of graphic information;
electron beam;
a set of 16 phosphor grains.
display processor;
a program that allocates video memory resources;
an electronic volatile device for storing information about a graphic image;
a device that controls the operation of a graphic display.
red, green and blue;
red, green, blue and brightness;
yellow, green, blue and red;
yellow, blue, red and brightness.
raster;
vector.
A pixel on the display screen is:
A video controller is:
The color of a dot on the display screen with a 16-color palette is formed from the signals:
Which way of presenting graphical information is more economical in terms of memory usage:
Test on the topic "Coding and processing of graphic information"
Option 2
a complete set of graphic primitives of a graphic editor;
a graphical editor environment;
list of operating modes of the graphical editor;
a set of commands that can be used when working with a graphical editor.
phosphor grain;
vector graphics;
raster graphics.
an electronic device for storing the binary code of the image displayed on the screen;
a program that allocates PC resources during image processing;
a device that controls the operation of a graphic display;
part of random access memory.
straightforward;
fractal;
vector;
raster.
display processor and video memory;
display, display processor and video memory;
display processor, RAM, highway;
backbone, display processor and video memory.
a graphical editor environment;
the simplest figures drawn with the help of special tools of the graphic editor;
operations performed on files containing images created in a graphical editor;
modes of operation of the graphical editor.
What extension do the files of the graphics editor Paint have?
Toolbar buttons, palette, working area, menu form:
The smallest element of the screen surface for which the address, color and intensity can be set is:
Deformation of the image when changing the size of the picture is one of the disadvantages:
Video memory is:
Graphics with the representation of an image in the form of collections of points is called:
What devices are included with the graphics adapter?
Primitives in a graphics editor are:
ANSWERS
Option 1
Municipal budgetary educational institution
"Secondary school number 20"
Information coding test
Grade 7 (FGOS)
MBOU "Secondary School No. 20"
Pospelova Galina Vasilievna
Novomoskovsk
2018 Nov.
Explanatory note.
This didactic material on the topicInformation Processing is recommended for grade 7 students. The material includes assignments to which students give a written answer.
Goals:
subject -formation of an understanding of the basic concepts associated with the coding of graphic and text information on the computer;
metasubject -basic skills and abilities to use coding tools for solving practical problems; mastery of the basics of self-control, self-esteem, decision-making and making informed choices in educational and cognitive activities;
personal- the ability to link knowledge about the basic capabilities of a computer with one's own life experience; interest in issues related to practical application computers.
Solved educational tasks:
1) consideration of the coding of graphic and text formations;
2) determination of the information volume of the image, message;
3) determination of the codes of the characters of the text according to the code tables.
Test on the topic " Coding of text and graphic information "
Exercise 1
In what order will the text fragments “excel”, “byte”, “8c”, “10g”, “9a”, “10a” go if you arrange them in descending order?
A. "byte", "excel", "8v", "9a", "10g", "10a"
B. "byte", "excel", "8v", "9a", "10a", "10g"
C. "10a", "10g", "9a", "8v", "byte", "excel"
D. "byte", "excel", "9a", "8v", "10g", "10a"
E. "excel", "byte", "10g", "10a", "9a", "8v"
Assignment 2
Which maximum amount characters can contain a code table, if during storage one character from this table takes 10 bits of memory?
A. 800
B. 80
C. 1024
D. 512
E. 256
Assignment 3
Select the word with the highest sum of character codes from the ASCII encoding table.
A. Window
B. Cinema
C. Nika
D. Horse
E. Night
Assignment 4
Select a piece of text "1999", "2001", "file", "file", "2b2d", which has the minimum sum of character codes in the ASCII table.
A... "2b2 d»
B... "file"
C. « file»
D... "1999"
E. "2001"
Assignment 5
Cyan on a computer with a 125 KB page size is encoded as 0011. What is the resolution of the graphic display?
A. 640 × 200
B. 320 × 400
C. 640 × 400
D. 640 × 800
E. 512 × 400
Assignment 6
In the process of converting a raster graphic file its volume has decreased by 1.5 times. How many colors were in the palette initially if after conversion a bitmap of the same size was obtained in a 256-color palette?
A. 3072
B. 384
C. 2048
D. 12
E. 4096
Assignment 7
Some of the pages of the book are color images in a sixteen-color palette and in a format of 320 × 640 pixels; pages containing text are formatted as 64 lines with 48 characters per line. How many pages of a book can be saved on a 40 MB hard magnetic disk if the number of pages with color images is 80 more than the number of pages containing only text?
A. 400
B. 720
P. 320
D. 100
E. 530
Sources of information:
Bosova L.L. Informatics: a textbook for grade 7 / L.L. Bosova, A. Yu. Bosova - Moscow: BINOM. Knowledge Laboratory, 2015 - 224 p.
Bosova L.L. Informatics: workbook for grade 7 / L.L. Bosova, A. Yu. Bosova - Moscow: BINOM. Knowledge laboratory, 2015 - 160 p.
Rusakov S.V. Test tasks on basic course informatics / S.V. Rusakov, L.V. Shestakov. - M.: Chistye Prudy, 2006 .-- 32 p.
Key
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| D | C | E | E | C | E | B |
Option 1
How much information does the binary encoding of 1 point on a color screen (16 colors) require?
d) 1 KB.
Option 2
a) 10,000 bits;
b) 10,000 bytes;
c) 10 KB;
d) 1000 bits.
Option 3
a) 2 times;
b) 4 times;
c) 8 times;
d) 16 times.
Option 4
d) 16 bytes.
ANSWERS
Option 1
For storing a bitmap with a size of 128 x 128 pixels, 4 KB of memory are allocated. What is the maximum possible number of colors in the image palette.
Solution:
Determine the number of pixels in the image. 128 * 128 = 16384 dots or pixels. The amount of memory for an image of 4 KB is expressed in bits, since V = I * X * Y is calculated in bits. 4KB = 4 * 1024 = 4,096 bytes = 4096 * 8 bits = 32,768 bits. Find the color depth I = V / (X * Y) = 32768: 16384 = 2.
N = 2 I, where N is the number of colors in the palette. N = 4. Answer: 4
What is the minimum amount of memory (in bytes) that is sufficient to store a 32 x 32 pixel black and white bitmap if the image is known to use no more than 16 shades of gray?
Solution:
The color depth is 4 because 16 color gradations are used. 32 * 32 * 4 = 4096 bits of memory for storing black and white images. 4096: 8 = 512 bytes. Answer: 512 bytes
How much information does the binary encoding of 1 point on a color screen in 16 colors require?
c) 4 bits;
d) 1 KB.
Option 2
How much video memory is required to store four pages of an image if the bit depth is 24 and the display resolution is 800 x 600 pixels?
Solution:
Let's find the amount of video memory for one page: 800 * 600 * 24 = 11520000 bits = 1440000 bytes = 1406.25 KB ≈ 1.37 MB. 1.37 * 4 = 5.48 MB ≈ 5.5 MB for storing 4 pages. Answer: 5.5 MB
The video memory page is 16000 bytes. The display operates in a mode of 320 * 400 pixels. How many colors are in the palette?
Solution:
V = I * X * Y - volume of one page, V = 16000 bytes = 128000 bits by condition. Find the color depth I. I = V / (X * Y). I = 128000 / (320 * 400) = 1. Now let's determine how many colors are in the palette. K =2 I , where K- the number of colors, I- color depth . K = 2 Answer: 2 colors.
A raster graphic file contains a black and white image (without grayscale) with a size of 100x100 pixels. What is the information volume of this file?
a) 10,000 bits;
b) 10,000 bytes;
c) 10 KB;
d) 1000 bits.
Option 3
Determine the amount of computer video memory that is required to implement the graphics mode of the High Color monitor (16 bits per point) with a resolution of 1024 x 768 pixels and a palette of 65536 colors.
Solution:
The number of image points is equal to: 1024 × 768 = 786 432. The required amount of video memory is: 16 bits ´ 786 432 = 12 582 912 bits = 1572864 bytes = 1536 KB = 1.5 MB
Answer: 1.5 MB
Specify the minimum amount of memory (in kilobytes) that is sufficient to store any 256 x 256 pixel bitmap image, if the image is known to use a 2-16 color palette. The palette itself does not need to be stored.
Solution:
Let's find the minimum amount of memory required to store one pixel. The image uses a palette of 2 16 colors, therefore, one pixel can be associated with any of 2 16 possible numbers colors in the palette. Therefore, the minimum amount of memory for one pixel will be equal to log 2 2 16 = 16 bits. The minimum amount of memory sufficient to store the entire image will be 16 * 256 * 256 = 2 4 * 2 8 * 2 8 = 2 20 bits = 2 20: 2 3 = 2 17 bytes = 2 17: 2 10 = 2 7 KB = 128 KB.
Answer: 128 KB.
In the process of converting a graphic file, the number of colors decreased from 65,536 to 256. How many times will the information volume of the file be reduced?
a) 2 times;
b) 4 times;
c) 8 times;
d) 16 times.
Option 4
Is the video memory of 256 KB sufficient to operate the monitor in 640 ´ 480 mode with a palette of 16 colors?
Solution:
Let's find out the amount of video memory that will be required to operate the monitor in 640x480 mode and a palette of 16 colors. V = I * X * Y = 640 * 480 * 4 (2 4 = 16, color depth is 4),
V = 1228800 bits = 153600 bytes = 150 KB. 150< 256, значит памяти достаточно.
Answer: enough.
The monitor operates with a 16 color palette at 640 * 400 pixels. It takes 1250 KB to encode the image. How many pages of video memory does it take?
Solution:
Because page is a section of video memory that contains information about one screen image of one "picture" on the screen, i.e. Since several pages can be located simultaneously in the video memory, then to find out the number of pages it is necessary to divide the amount of video memory for the entire image by the amount of memory by 1 page. TO-number of pages, K =V pic / V 1 page... V image = 1250 KB as required.
To do this, let's calculate the amount of video memory for one page of an image with a 16 color palette and a resolution of 640 * 400. V 1 page = 640 * 400 * 4, where 4 is the color depth (2 4 = 16). V 1 page = 1024000 bits = 128000 bytes = 125 KB. K = 1250: 125 = 10 pages. Answer: 10 pages.
How much information is required for binary encoding of 1 point on a black and white screen (without brightness gradation)?
a) 1 bit;
