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.
Audio compression achieves reduction in the transmission bandwidth requirement of digital audio streams and also the storage size of audio files. Information redundancy is reduced in both lossy and lossless compressions with the help of methods like coding, pattern recognition and linear prediction. There are different technologies that are used for the purpose that include MP2 Systems, MP3 Systems, PAC, VQF and others.
Speech compression is used to compress the data of digital audio signals possessing speech. Speech compression utilizes evaluation of speech-specific limitations, using processing techniques for audio signals to replicate the speech signal, united with the general data compression algorithms to symbolize the resultant modeled restrictions in a solid bitstream.
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.
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