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Audio Tech -
Audio Tech
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Written by admin
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A little story about the MP3 file format is popular. Talk about MP3 is not separated from the MPEG file format (Motion Pictures Expert Group). MPEG (usually pronounced as eM-PEG) is known as the standard format in the storage and distribution of compressed multimedia data. We know, the data in the form of audio and video recordings will be very large,
and thus will be consuming space on the storage media. Such MPEG compression techniques can help reduce the size of multimedia files without losing information stored therein. One application of the most popular MPEG is the format of VCD (Video Compact Disc). Just so you know, when we set the movie in VCD, then conducted by the VCD player device was actually reading a file saved in the MPEG format in VCD discs and displays the results on television.
Unlike the ZIP compression format which retains the original data structure (non-lossy), the MPEG compression techniques are lossy, which means that this technique eliminates some of the information that is not significant. In particular algorithm, called the DCT (discrete cosine transform), then a video can be compressed with a compression ratio up to over 10:1, meaning 10 MB of data, can be reduced to only 1 MB in quality only slightly lower than the file format original. With the development of microprocessor technology, which produces the data processing speed is higher, then the MPEG compression techniques can continue to be improved to produce image quality equal to the original. Compression format that is applied to the DVD (Digital Versatile Disk) and digital television broadcast for example, is also compressed with the MPEG method, but with a more advanced algorithm than that applied to the VCD.
How to work this MP3 compression is to remove noise at frequencies that can not be heard by human ears. This method has significant effectiveness. When a CD Audio (CDDA format) with a capacity of approximately 640 MB is only capable of storing recordings along the 70 minutes, then allows MP3 format audio files with a data rate of 128 kpbs all spent only 1 minute for 1 MB of space on the storage media. Calculate yourself how many songs can be crammed into one CD if the average length of a song is about 4-5 minutes.
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Audio Tech 
