Average bit rate refers to the average amount of data transferred per second. This is commonly referred to for digital music or video. An mp3 file, for example, that has an average bit rate of 128 kbit/s transfers, on average, 128,000 bits every second. It can have higher bit rate and lower bit rate parts, and the average bit rate is obtained by dividing the sum of the bit rate of each sample by the number of samples. Bit rate is not fully reliable as a measure of audio/video quality, as some formats such as wma and Vorbis produce higher sound quality than the standard mp3 format at the same bit rate. MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a popular digital audio encoding and lossy compression format, designed to greatly reduce the amount of data required to represent audio, yet still sound like a faithful reproduction of the original uncompressed audio to most listeners. ... In telecommunications and computing, bit rate (sometimes written bitrate) is the frequency at which bits are passing a given (physical or metaphorical) point. It is quantified using the bit per second (bit/s) unit. ... In signal processing, sampling is the reduction of a continuous signal to a discrete signal. ... Windows Media Audio (WMA) is a proprietary compressed audio file format developed by Microsoft. ... Vorbis is an open and free lossy audio compression codec project headed by the Xiph. ...
Average bit rate can also refer to a form of variable bit rate encoding where the encoder will try to average the use of data for high and low complexity areas so that the bitrate of every audio segment averaged yields a specified bitrate. Variable bit rate (VBR) is a term used in telecommunications and computing that relates to sound or video quality. ...
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