ASCII Code and Binary

Summary

This educational video script teaches viewers how to convert words into their ASCII binary equivalents and vice versa. It starts by explaining the ASCII system and provides a partial ASCII table. The script demonstrates converting the word 'blue' into binary by assigning decimal values to each letter and then converting those to 7-bit binary codes. It also shows how to reverse the process, converting binary codes back into the word 'lemon' using the ASCII table. The tutorial is designed to help users understand the basics of ASCII encoding and binary representation.

Takeaways

• 🔤 ASCII stands for American Standard Code for Information Interchange.
• 📊 The ASCII table provided is partial, focusing on certain characters.
• 🔡 The task is to convert the word 'blue' into its binary representation using ASCII values.
• 📐 The ASCII code system is a seven-bit binary system.
• 🔢 Each letter's ASCII value is converted to binary by breaking it down into powers of two (64, 32, 16, 8, 4, 2, 1).
• 🅱️ The capital letter 'B' has a decimal value of 66, which translates to the binary '0100001'.
• 🅰️ The lowercase 'L' has a decimal value of 108, which translates to the binary '1101100'.
• 🆄 The lowercase 'U' has a decimal value of 117, which translates to the binary '01110101'.
• 🅾️ The lowercase 'E' has a decimal value of 101, which translates to the binary '01100101'.
• 🔄 The process can be reversed to convert binary codes back into words using the ASCII table.
• 🍋 An example binary message translates to the word 'lemon' when converted back to ASCII.

Q & A

What does ASCII stand for?

ASCII stands for American Standard Code for Information Interchange.

How many bits does the ASCII code system use?

The ASCII code system uses a seven-bit binary system.

What is the decimal value of the capital letter 'B' in ASCII?

The decimal value of the capital letter 'B' in ASCII is 66.

What is the binary representation of the capital letter 'B' in ASCII?

The binary representation of the capital letter 'B' in ASCII is 1000010.

How do you convert the decimal value of a letter to its binary representation in ASCII?

You convert the decimal value of a letter to its binary representation by adding up the values of 2 raised to the power of the positions (64, 32, 16, 8, 4, 2, 1) until you reach the decimal value.

What is the decimal value of the lowercase letter 'l' in ASCII?

The decimal value of the lowercase letter 'l' in ASCII is 108.

How many bits are used in the binary representation of the lowercase letter 'l'?

The binary representation of the lowercase letter 'l' uses all seven bits in the ASCII system.

What is the binary code for the word 'blue' in ASCII?

The binary code for the word 'blue' in ASCII is 1000010 1101100 01101100 01100101.

How do you convert a binary code back to its corresponding ASCII character?

You convert a binary code back to its corresponding ASCII character by summing the values of the bits set to 1 and then finding the character with that decimal value in the ASCII table.

What is the word represented by the binary code '1100101' in ASCII?

The binary code '1100101' corresponds to the letter 'm' in ASCII.

What is the process of converting a word into binary using the ASCII table?

The process of converting a word into binary using the ASCII table involves finding the decimal values of each letter, then converting those decimal values into their respective seven-bit binary codes.

Outlines

00:00

🔤 Understanding ASCII and Binary Conversion

This paragraph introduces the concept of ASCII (American Standard Code for Information Interchange) and its role in converting characters into binary codes. The focus is on converting the word 'blue' into binary using a partial ASCII table. The process involves identifying the decimal values for each letter ('B'=66, 'L'=108, 'U'=117, 'E'=101) and then converting these decimal values into binary using a 7-bit system. The binary values are calculated by adding up the powers of two that sum up to the decimal value (e.g., 66 in binary is 0100001). The explanation also covers the importance of capitalization in ASCII values.

05:04

🔄 Decoding Binary Messages Using ASCII

The second paragraph demonstrates how to convert binary codes back into ASCII characters. It explains the process of adding up the binary values to find their decimal equivalents, which are then matched to letters in the ASCII table. The example provided decodes the binary codes to reveal the word 'lemon'. The paragraph emphasizes the importance of understanding the binary system and its relationship with ASCII for decoding messages.

Keywords

💡ASCII

ASCII stands for the American Standard Code for Information Interchange, which is a character encoding standard for electronic communication. It represents text in computers, telecommunications equipment, and other devices that use text. In the video, ASCII is central to the discussion as it provides the basis for converting letters into binary codes. The script uses ASCII values to demonstrate how the word 'blue' can be converted into binary.

💡Binary

Binary is a system of numerical notation that represents numeric values using two symbols, typically 0 and 1. It is the basis for all digital computer systems. In the context of the video, binary is used to represent the ASCII values of letters. The script shows how each letter's ASCII decimal value is converted into a binary sequence, which is crucial for digital data representation.

💡Decimal

Decimal refers to the base-10 number system, which is the most common numerical system used in daily life. In the video, decimal values are used to represent the ASCII values of letters before they are converted into binary. For example, the capital letter 'B' has a decimal value of 66, which is then converted into its binary equivalent.

💡Bit

A bit is the basic unit of information in computing and digital communications, representing a logical value of 0 or 1. The video script mentions that the ASCII code is a seven-bit binary system, meaning each character is represented by a sequence of seven bits. This is important for understanding how characters are encoded in ASCII.

💡Conversion

Conversion in the video refers to the process of changing a character's ASCII decimal value into its binary equivalent. This is a key operation demonstrated in the script, showing how each letter of the word 'blue' is converted from its decimal ASCII value to a binary sequence.

💡Table

The term 'table' in the video refers to the partial ASCII table provided, which lists the decimal values of certain characters. This table is used as a reference to look up the decimal values of letters before their conversion to binary. The script emphasizes the utility of such a table for performing conversions.

💡Capitalization

Capitalization refers to the distinction between letters in upper case (capital letters) and lower case (small letters). In the video, it is noted that the ASCII values differ between uppercase and lowercase letters, which affects their binary representations. For instance, 'B' (capital) has a different ASCII value from 'b' (lowercase).

💡Value

In the context of the video, 'value' refers to the numerical representation of characters in the ASCII system. Each character has a unique value that is used to convert it into binary. The script provides examples of how to find these values for characters like 'B', 'L', 'U', and 'E'.

💡Code

Code in the video refers to the binary sequence that represents a character's ASCII value. The script demonstrates how to create these binary codes for the letters in the word 'blue'. Understanding these codes is essential for digital data transmission and storage.

💡Message

The term 'message' in the video is used in the context of a binary coded message that needs to be decoded back into text using the ASCII table. The script provides an example of decoding a binary message into the word 'lemon', illustrating the reverse process of converting binary back to ASCII characters.

Highlights

Introduction to ASCII code and its purpose in information interchange.

Explanation of converting the word 'blue' to binary using ASCII values.

Emphasis on the importance of capitalization in ASCII values.

ASCII decimal value for capital 'B' is 66.

ASCII decimal value for lowercase 'l' is 108.

ASCII decimal value for 'u' is 117.

ASCII decimal value for 'e' is 101.

Description of the ASCII code as a seven-bit binary system.

Conversion of decimal 66 to binary using the seven-bit system.

Binary equivalent of 66 is 1000010.

Conversion of lowercase 'l' (108) to binary.

Binary equivalent of 108 is 1101100.

Conversion of 'u' (117) to binary.

Binary equivalent of 117 is 1110101.

Conversion of 'e' (101) to binary.

Binary equivalent of 101 is 1100101.

Demonstration of converting a binary coded message back to a word using ASCII.

Conversion of binary code to the letter 'l'.

Conversion of binary code to the letter 'e'.

Conversion of binary code to the letter 'm'.

Conversion of binary code to the letter 'o'.

Conversion of binary code to the letter 'n'.

Final binary code corresponds to the word 'lemon'.

Transcripts

in this video we're going to focus on

the ascii code

the ascii code stands for

the american standard code for

information interchange

so in this problem we are given a a

partial ascii table this is not the

whole thing

and we're asked to convert the word blue

to binary

so let's go ahead and do that

let's make a table that will make this

a lot easier for us

so we have the letter

the decimal value

and then

the binary value that's going to

correspond to that

so the first letter is going to be b

and then l and then u and then e

now we need to pay attention to the

capitalization

capital b

has a decimal value of 66.

and then lowercase l

has an ascii decimal value of 108

and then u

has a value of 117

and then e has a value of 101

so these are the letters that you'll

find in a keyboard

now our next thing

the next thing that we need to do is

convert the decimal values into

binary values

now the ascii code is a seven bit binary

system

so two to the n minus one or two to the

seven minus one that's two to the sixth

which is 64.

64 is going to be

the highest placement for the binary

numbers so it's going to be 64 32

16

8

4 2

and then one

so to get 66 we need to add up 64 and 2.

so we're going to put a 1 for those

values it's 1

0

0 0

0 1 0.

so that is the binary equivalent of 66.

so the letter b

corresponds to the

the seven bit binary code that we see

here

now let's move on to the next one

so the letter l has a decimal value of

108 to get 108 we need 64. we need 32 so

that's 96.

now if we add 16

to 96 that's going to be 112 which is

too much

since we don't need a 16 we're going to

put a zero now we do need an eight

so we have 96 plus eight that's 104.

we only need four more to get to 108. so

we'll put a one on the four

and a zero for the two and one

so that is the 7-bit binary code for the

letter l

now for u which is 117 we need the 64

the 32

so that's 96.

if we add 16 to 96

that'll give us 112. so we need five

more

to get the five we need to use a four

and a one

so that is the binary equivalent of

117

if you add up 64

32

okay i'm not sure what just happened

there

sometimes this computer

acts up but if you add 64 32 16

4 and 1

that'll give you

117 now for the letter e

we need to get 101

so we need to add up 64 32

that's 96

so we only need five more to get to 101

so we're going to use the 4 and the 1.

so that's the binary code

for the letter e

in the ascii table

so thus we have this

the word blue

has the binary codes

1 0

0 0

0 1 0 and then for l it's 1 1

zero one one zero zero

and for you it's one one one

zero one zero one and finally for e

one one zero zero one zero one

so that's how you could use the ascii

table that was given to you

to convert a word into binary

now

let's work backwards

so using the ascii table shown below

convert the following binary coded

message

into a word

so feel free to pause the video and try

this example problem

so first let's get the decimal

equivalent of

each code

so this is

going to be 64

32

16

8

4 2 and 1.

you know what let me write this better

i'm gonna have to space out these values

so you won't get confused

so we have a 64

we have an 8 and we have a 4.

so if we add those numbers

64

plus a plus four

this is 76

and 76 looking at the ascii table

corresponds to the letter l

so that's the first one

so now let's move on to the second code

it's 1

1

0

0

1 0 1.

so we have a 64 we have a 32 a 4 and a

1.

so 64 plus 32 plus 4 plus 1

and that is 101

and 101 corresponds to the letter e so

we have a lowercase e

now let's move on to the next one

so it's 1

1

0

1 1

0 1.

so we have a 64

a 32

an 8

a 4 and a 1.

64 plus 32 plus 8 plus 4 plus 1

so that's going to add up to

109

and 109 corresponds to

the letter m

so you can probably figure out what word

this is going to

now let's move on to the next one so we

got one one

zero one one one one

so we have everything except 16

so it's 64 plus 32

plus eight plus four plus two plus one

and so that is one eleven

so one eleven that's o

and now for the last one

one one

zero

one one one zero

so we have everything except

16 and one

so it's 64 plus 32

plus eight plus four plus two

and that is 110

and 110 is n

so

the binary code corresponds to the word

lemon

so now you know how to use the ascii

table you know how to in the convert

between the ascii code

and

a binary code