The Frame Format
Each frame consists
of 1152 mono or stereo frequency-domain output samples. It is divided into two granules of 576 samples
each. The granule is made up of 18
frequency lines * 32 subband blocks
Frequency lines of
frame compositions of MP3 in two audio channels
The size of the frame
will depend on the bitrate and the sampling frequency. It can be computed using the formula:
[(144*bitrate)/sampling
frequency] + padding [bytes]
A MP3 song with bit rate of 128kbps, sampling frequency of 44.1kHz
and padding bytes set will have a frame size of
417, calculation;
[(144*128000)/44100]+1 = 417.
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