The lower the bit rate, the lower the size of the encoded audio and the network bandwidth requirement. Most often, the bit rate is a tunable parameter during encoding.īit rate is important because it has a direct impact on the size of the encoded file (in storage applications) and the network bandwidth needed for audio transmission (in streaming and broadcast applications). Bit rate is expressed in units of kbps (kilobits per second). The bit rate of a codec refers to the (average) number of bits it uses to encode one second of raw audio. Bit RateĪ note on “bit rate” before we start. If not, do check my article on the basics of digital audio here.
This article assumes that you have an understanding of the common terms related to digital audio like frequency, sampling rate, and channels. If you’ve been wondering what exactly is the difference between MP3, AAC, AC3, WAV, WMA, and Opus, then this article is for you. In particular, I will focus on the aspects that are most relevant from a user’s perspective (and not from an algorithm perspective). In this article, I will discuss and compare the key features of some popular audio codecs. Visual Data Unveils the Future of Media Workflows with VIDA Content Operating System Imagine Communications’ Selenio Network Processor Proves a Perfect Partner for Panasonic KAIROS in Hybrid SDI/IP Live Productions
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