ASCII Code and Binary
Summary
TLDRThis 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
🔤 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.
🔄 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.
Mindmap
Keywords
💡ASCII
💡Binary
💡Decimal
💡Bit
💡Conversion
💡Table
💡Capitalization
💡Value
💡Code
💡Message
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
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