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Click to edit Master subtitle style 12/4/09 MPEG 1 Layer 1 Ajaiy Tyagi
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12/4/09 Encoder Frequency Domain Mapping Psychoacoustic Model Quantizer and coding Frame Packing
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12/4/09 Decoder Frame unpacking Reconstruction Inverse Mapping
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12/4/09 Frequency Domain Coding DFT of 512 consecutive audio samples Grouped in 32 equal with subbands Done by polyphase filters » Ideally should be divide like critical bands » Loss of information » Overlap
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12/4/09 Psychoacoustic model Spectral Analysis and SPL Normalization Identifying tonal maskers Decimation of maskers Individual masking thresholds Global masking thresholds
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12/4/09 Psychoacoustic model Audio samples are normalized FFT and Hanning window are used on the signal Power spectral density is obtained referenced to 96dB Tonal and non tonal maskers are
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This note was uploaded on 12/04/2009 for the course ECE 12 taught by Professor Ab during the Spring '09 term at Drexel.

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MPEG 1 Layer 1 - MPEG 1 Layer 1 Ajaiy Tyagi Click to edit...

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