Variable Bit Rate

Digital video - Constant bit rate versus variable bit rate 1 Of course when using this method the Variable Bit Rate|bit rate is variable because it tracks the variations of the BPP.

Variable bit rate 1 MP3, Opus (audio format)|Opus, Windows Media Audio|WMA, Vorbis, and Advanced Audio Coding|AAC audio files can optionally be encoded in VBR. Variable bit rate encoding is also commonly used on MPEG-2 video, MPEG-4 Part 2 video (Xvid, DivX, etc.), MPEG-4 Part 10/H.264 video, Theora, Dirac (codec)|Dirac and other video compression formats. Additionally, variable rate encoding is inherent in lossless compression schemes such as FLAC and Apple Lossless.

Traffic contract - Non-Real-Time Variable Bit Rate (nrt-VBR) 1 The nrt-VBR service category is used for connections that transport variable bit rate traffic for which there is no inherent reliance on time synchronisation between the traffic source and destination, but there is a need for an attempt at a guaranteed bandwidth or latency

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