The Concept
The Algorithm
- Layer Coding Options
- Hybrid Filter Bank
- Psychoacoustics Model
- Bit Allocation |
The Algorithm
for MP3 Compression As seen in the following diagram, the process of MP3 compression can be broken down into
steps. First, the input audio stream passes through a filter
bank that divides the sound into subbands of frequency. Simultaneously, it passes
through a psychoacoustic model that utilizes the concept
of auditory masking to determine what can or cannot be heard in each subband. The bit allocation block minimizes the audibility of noise.
Finally, the bit stream formatting block accumulates all the information and processes it
into a coded bitstream (Pan 2).
Next step: Layer Coding Options
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