- Data can be represented in binary, pixels, text.
- a.
in this picture I compressed the image from a jpeg into a much lower resolution tif file. This lower res tif file, was 15 times bigger than the original jpeg. Then I compressed the tif file into a jpg file of even worse resolution, and it was still far larger than the original.
c.
Sampling rate is the bitrate that sound is sampled at.
Lossy:
MP3: Most popular audio format.
WMA
AAC
Lossless:
FLAC (Free lossless audio compression)
ALAC (Apple lossless audio codec)
AIFF (Audio Interchange File format)
WAV (Waveform Audio File Format)
M4A (MPEg-4 AUDIO FILE)
Calculation:
Frequency × bit depth × channels = bit rate.
2 d. A codec is a decoder that converts digital signals into analogue signals. It decodes the digital signal for playback.
Lossy compression: This type of compression will lose some quality and have a far smaller file size. Mostly, whatever is lost, is generally not perceivable by humans.
Lossless compression: This type of compression does not lose quality but does have a smaller file size.
