DRC (dynamic range compression) referred as compression, is a useful process in which the dynamic range of any given audio signal is reduced or, in other words, the gap between low and high audio levels is narrowed down. This process is generally used in broadcasting, live sound reproduction and sound recording. The application of compression is achieved by passing any given audio signal straight through an electronic hard ware unit, or in some cases, through a carefully programmed software. In terms of audio signals, this device is known as a compressor.
Data compression or source coding refers to the process of encoding information using fewer bits, with the use of specific encoding schemes. Audio compression is a type of data compression that was designed to reduce the transmission bandwidth required by digital audio streams and also the storage size of audio files. Lossy and lossless algorithms are the audio compression algorithms that are implemented as audio codecs.
Advanced Audio Coding (AAC) is a digital audio compression format that makes use of the lossy scheme. It is also the standardized encoding scheme for digital audio that was designed to be the successor of the MP3 format and achieves better sound quality than MP3 at similar bit rates. The format compresses much more efficiently when compared to older formats like MP3.
MP3 is a digital audio encoding format based on a form of lossy data compression. Also known as MPEG-1 Audio Layer 3, it is a common audio format for consumer audio storage and is a standard for transfer and playback of music on digital audio players. It was designed by the Moving Picture Experts Group and has been approved by ISO/IEC standard.
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