Average Bit Rate (ABR) is an interpolation parameter of VBR. LAME has created this encoding mode for the poor file size ratio of CBR and the variable size of VBR generated files. ABR is a segment of every 50 frames (30 frames and about 1 second) within a specified file size. Low-frequency and insensitive frequencies use relatively low traffic. High-frequency and large dynamic performance uses high traffic. It can be used as a compromise between VBR and CBR.
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