Lossy Compression אשמח לקבל הגדרה מדויקת לביטוי זה שמתאים לקורס שלנו :)
Date: 14 Jul 2014 10:01
Number of posts: 2
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I think this subject isn't part of this course, since we have learned only Loseless Compressions. Meaning, both Huffman Code and LZ Compression are Compressions which information isn't lost during the compression process. It's like you have one-to-one function between the compressed code, and the original.
Unlike other compression methods and algorithm where information is lost during the compression process in purpose of shrinking the file size, which most known formats are mp3 for audio, jpeg for pictures, and mpg for video. They achieve that using the fact that there are sounds and colors which aren't detectable by human, and therefore removing them causing a smaller size file while the difference can be slightly detected. Of course, this make restoration to original very hard. In this case the higher the lose ratio, the higher the compression ratio, and lower quality. its like you have 'onto' function ('al' function) from the original code to the compressed code.