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Data Representation, Hex numbers, 1-10 - Coggle Diagram
Data Representation
For computer numbers look like this;
0 - 0
1 - 1
2 - 10
3 - 11
4 - 100
5 - 101
6 - 110
7 - 111
8 - 1000
9 - 1001
10 - 1010
How is Sound Stored?
we can
record sounds
using a
microphone
this is an
analogue signal
.
For a computer it has to be
converted into digital data.
this is done by analogue to digital convertor
How is sound converted?
Samples of the
Amplitude
of the wave are taken at
regular intervals
(sampling)
The Amplitude can only take
certain values depending on the bit depth.
Binary
- is a 2 base system made up on 0's and 1's
why Binary?
computers are not as smart as you think, As they only know 0's and 1's
The
CPU
has lots of
switches
but it can be either be
ON (1)
or
OFF (0)
Everything else is
programmed
to the computer
Logic Addition;
1+0=1
1+1+1=1 carry the 1
1+1=0 carry the 1
to add binary numbers together we,
Examples of Logic Addition;
1101+1110=
11011
0110+0010=
1000
0111+0011=
1010
Calculating the size of sound;
Sample frequency
(Hz)
x Bit depth x duration
(in seconds)
Example;
20 seconds of audio with a bit depth of 8 bits and a sample rate 8 bits Hz
Would be 20 x 8 x 1000=160,000 bits
Size and quality of sound
A quality of a sound depends on the sample frequency.
Sample frequency
is h
ow many samples are taken in one second
The higher
the sample frequency
the better quality it is
Bit Depth
is the number of bits available for each sample.
Bits -
(0's and 1's)
What is Hexadecimal?
Hexadecimal
(or Hex)
is a
base 16 number
system made up of
0's-9's
,
A-F
Hex numbers
0-9
0 - 0
1 - 1
2 - 2
3 - 3
4 - 4
5 - 5
6 - 6
7 - 7
8 - 8
9 - 9
A-F
10-A
11-B
1-10