Data Compression And MP3: Why Do We Compress?
We hear the word "compression" at all times, when it comes to MP3 and MP4 players in those days. Where did she come and why bother?
Recent (and data compression MP3: Understanding "Digital"), I explained that "digital" is the signal. Remember, the data can be stored as the first, or "analog" signals (such as cassettes, VHS, or a book) or can be digitized (converted into a series of 1 and 0), which can later be converted back to its raw form. Digitization of signals gives us the opportunity to save data in the form of errors. Then why do not we digitize everything? The answer is simple: It takes a lot of 1 and 0 to represent the shorter songs, videos, or movies. Standard 5-minute song can take more than 70 MB (which is 70 megabits, each byte has 8 bits or 1 and 0). This is 560 million 1 and 0, is much more Not only is it necessary to store all this information, but we have to deal with it and convert it into an analog signal in a short time. Fortunately, high-speed computing has been around for quite a while 'time, and formats like CDs have benefited from this.
But the CD is limited in space: about 700 MB (which contains about 10 pieces). Space has become a problem surely provide. Then the compression techniques have been introduced. How to pack works is that we take the signal to 70 MB (as we have above) and using a mathematical algorithm or a map, we can arrange bits, so that fewer bits need to save the same amount of information (in my next articles cover the information a little 'over here). For example, MP3 encoding, we can reduce the slope below the 70 5 MB MBS allows (this is a decrease of 92%). Now, understand this, but: the theory of compression has been around for much longer than the MP3s were sold. Why? You return to the technology in question. We reduced the storage of the entire song, but in order to extract the signal processing of the signal requires much the same amount of time.
I remember 7 years ago having to buy the internal hardware of a large card to fit into my computer to watch DVD movies on my new DVD-ROM. Why? DVD data is encoded into an MPEG-2 (similar to MP4). At that time, processors were not fast enough to handle the decoding. Now computers are fast enough to process the data with the software. Only in recent years now have the two technologies have collided. MP3 and MP4 are now a reality for a variety of reasons: 1) advanced compression techniques have made the file size even smaller than ever. 2) storage hardware has increased in the range of 100s GB on a very small package. 3) The processors are small enough, fast enough and cheap enough to fit in the palm of your hand. So where the technology from now? Mp4 (or video compression) is launched.
However, it is in its infancy and is still absent in the conditions of storage and processing required it needs to produce video quality is clearer and clearer that we are now waiting.
Pictures/SnapShot :
Recent (and data compression MP3: Understanding "Digital"), I explained that "digital" is the signal. Remember, the data can be stored as the first, or "analog" signals (such as cassettes, VHS, or a book) or can be digitized (converted into a series of 1 and 0), which can later be converted back to its raw form. Digitization of signals gives us the opportunity to save data in the form of errors. Then why do not we digitize everything? The answer is simple: It takes a lot of 1 and 0 to represent the shorter songs, videos, or movies. Standard 5-minute song can take more than 70 MB (which is 70 megabits, each byte has 8 bits or 1 and 0). This is 560 million 1 and 0, is much more Not only is it necessary to store all this information, but we have to deal with it and convert it into an analog signal in a short time. Fortunately, high-speed computing has been around for quite a while 'time, and formats like CDs have benefited from this.
But the CD is limited in space: about 700 MB (which contains about 10 pieces). Space has become a problem surely provide. Then the compression techniques have been introduced. How to pack works is that we take the signal to 70 MB (as we have above) and using a mathematical algorithm or a map, we can arrange bits, so that fewer bits need to save the same amount of information (in my next articles cover the information a little 'over here). For example, MP3 encoding, we can reduce the slope below the 70 5 MB MBS allows (this is a decrease of 92%). Now, understand this, but: the theory of compression has been around for much longer than the MP3s were sold. Why? You return to the technology in question. We reduced the storage of the entire song, but in order to extract the signal processing of the signal requires much the same amount of time.
I remember 7 years ago having to buy the internal hardware of a large card to fit into my computer to watch DVD movies on my new DVD-ROM. Why? DVD data is encoded into an MPEG-2 (similar to MP4). At that time, processors were not fast enough to handle the decoding. Now computers are fast enough to process the data with the software. Only in recent years now have the two technologies have collided. MP3 and MP4 are now a reality for a variety of reasons: 1) advanced compression techniques have made the file size even smaller than ever. 2) storage hardware has increased in the range of 100s GB on a very small package. 3) The processors are small enough, fast enough and cheap enough to fit in the palm of your hand. So where the technology from now? Mp4 (or video compression) is launched.
However, it is in its infancy and is still absent in the conditions of storage and processing required it needs to produce video quality is clearer and clearer that we are now waiting.
Pictures/SnapShot :
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