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| Psykoakustisk Maskering× | Lineær prædiktiv kodning× | |
|---|---|---|
| Fagområde | Akustik | Akustik |
| Familie | Process / pipeline | Process / pipeline |
| Oprindelsesår≠ | 1961 | 1975 |
| Ophavsperson≠ | Eberhard Zwicker | Freddy Burg, John Makhoul |
| Type≠ | Perceptual model for audio systems | Predictive speech coding and analysis |
| Oprindelig kilde≠ | Zwicker, E., & Scharf, B. (1965). Psychoacoustics: Facts and Models. Springer-Verlag. ISBN: 978-3540631644 | Makhoul, J. (1975). Linear prediction: A tutorial review. Proceedings of the IEEE, 63(4), 561–580. DOI ↗ |
| Aliasser | masking, temporal masking, frequency masking, auditory masking | LPC, autoregressive model, speech prediction, vocal tract modeling |
| Relaterede | 5 | 5 |
| Resumé≠ | Psychoacoustic masking describes how the human auditory system suppresses the perception of weak sounds in the presence of stronger sounds. Formalized by Eberhard Zwicker in the 1960s, masking is a fundamental phenomenon in hearing and the basis for perceptual audio coding (MP3, AAC, OPUS). Masking occurs both in frequency (spectral masking) and time (temporal masking), and understanding these effects enables efficient audio compression and realistic sound design. | Linear Predictive Coding (LPC) is a powerful signal processing technique for modeling and compressing speech by assuming each speech sample can be predicted from a linear combination of previous samples. Pioneered by Burg and Makhoul in the 1970s, LPC is the foundation of speech codecs, speech synthesis, speaker recognition, and speech enhancement. LPC exploits the time-correlated structure of speech to achieve high compression ratios and enable efficient parameter extraction. |
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