What is the difference between 128kbps and 320 kbps mp3 files? . . The difference between 128 kbps and 320 kbps MP3 Song Files Brief about the MP3 file structure and bit rate: MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a patented digital audio encoding format using a form of lossy data compression. It is a common audio format for consumer audio storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on digital audio players. The use in MP3 of a lossy compression algorithm is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 11 times smaller than the CD file created from the original audio source. An MP3 file can also be constructed at higher or lower bit rates, with higher or lower resulting quality. The compression works by reducing accuracy of certain parts of sound that are deemed beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It uses psycho-acoustic models to discard or reduce precision of components less audible to human hearing, and then records the remaining information in an efficient manner. Bit Rate and Audio Quality In telecommunications and computing, bitrate (sometimes written bit rate, data rate or as a variable R or fb) is the number of bits that are conveyed or processed per unit of time. The bit rate is quantified using the bits per second (bit/s or bps) unit, often in conjunction with an SI prefix such as kilo- (kbit/s or kbps), mega- (Mbit/s or Mbps), giga- (Gbit/s or Gbps) or tera- (Tbit/s or Tbps). Effects of bit rate on space and audio quality When performing lossy audio encoding (compression process), such as creating an MP3 file, there is a trade-off between the amount of space used and the sound quality of the result. Typically, the creator is allowed to set a bit rate, which specifies how many kilobits the file may use per second of audio. Using a lower bit rate provides a relatively lower audio quality and produces a smaller file size. Likewise, using a higher bit rate outputs a higher quality audio, but also results in a larger file. Files encoded with a lower bit rate will generally play back at a lower quality. A few recommendations If you have larger storage device like hard disk drives, then I would recommend to enjoy the sound quality with 320 kbps MP3 files, however for limited storage device like MP3 compatible mobile phones, I would recommend to go for lower bit rate MP3 files. If you have mobile device with greater storage or expandable memory, so nothing to worry to use MP3 files with higher bit rate. Simple Equations Higher Bit Rate >> More Bits/Seconds >> More Sound Information >> Higher Sound Quality >> Greater Storage Space Lower Bit Rate >> Less Bits/Seconds >> Less Sound Information >> Lower Sound Quality >> Lesser Storage Space
Posted on: Wed, 26 Jun 2013 17:57:46 +0000
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