Next time, try to write complete sentences, if you expect answers in complete sentences. Thank you.
I assume, that you want to know what lossy compression means.
In order to reduce the size of a file (for example a music file or a picture or a movie) you can compress the file in a way that information is omitted, but in a way it isn't recognizeable for the human senses.
Take a music file for example. If you have quiet higher pitched instruments (like a violin for example) and suddenly a loud bass horn is played, you will probably not notice the violin being played. Therefore this information about the high violin frequency is omitted to reduce the file size, as you wouldn't hear it anyway.
The same is done with movies. If you see very fast movements (e.g. a woman with long hair throwing her hair back) you wouldn't be able to see every single hair.
The resolution gets reduced, and you will still see the movement, but not every single hair. It might even look a bit blocky if you freezeframe the scene and look cloesly.
So, since information is lost while compressing, this technique is called "lossy compression".
Lossy compression just means that in addition to compressing the data, it is approximated instead of recorded exactly. We are most familiar with this in the form of photos, videos, and MP3's.
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Next time, try to write complete sentences, if you expect answers in complete sentences. Thank you.
I assume, that you want to know what lossy compression means.
In order to reduce the size of a file (for example a music file or a picture or a movie) you can compress the file in a way that information is omitted, but in a way it isn't recognizeable for the human senses.
Take a music file for example. If you have quiet higher pitched instruments (like a violin for example) and suddenly a loud bass horn is played, you will probably not notice the violin being played. Therefore this information about the high violin frequency is omitted to reduce the file size, as you wouldn't hear it anyway.
The same is done with movies. If you see very fast movements (e.g. a woman with long hair throwing her hair back) you wouldn't be able to see every single hair.
The resolution gets reduced, and you will still see the movement, but not every single hair. It might even look a bit blocky if you freezeframe the scene and look cloesly.
So, since information is lost while compressing, this technique is called "lossy compression".
Maybe you could add more detail to the question?
Lossy compression just means that in addition to compressing the data, it is approximated instead of recorded exactly. We are most familiar with this in the form of photos, videos, and MP3's.
Jpeg compression is a lossy compression wherein some data is lost as the image's file size is reduced in view of compression.
If u r asking abt wat is lossy compression, then here goes.
Lossy compression is a technique where upon de-compression one cannot obtain back the same data that was compressed.
One popular lossy compression is mp3.
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