Audio peak reduction using a synced allpass filter

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference contributionScientificvertaisarvioitu

6 Lataukset (Pure)

Abstrakti

Peak reduction is a common step used in audio playback chains to increase the loudness of a sound. The distortion introduced by a conventional nonlinear compressor can be avoided with the use of an allpass filter, which provides peak reduction by acting on the signal phase. This way, the signal energy around a waveform peak can be smeared while maintaining the total energy of the signal. In this paper, a new technique for linear peak amplitude reduction is proposed based on a Schroeder allpass filter, whose delay line and gain parameters are synced to match peaks of the signal's autocorrelation function. The proposed method is compared with a previous search method and is shown to be often superior. An evaluation conducted over a variety of test signals indicates that the achieved peak reduction spans from 0 to 5 dB depending on the input waveform. The proposed method is widely applicable to real-time sound reproduction with a minimal computational processing budget.

AlkuperäiskieliEnglanti
OtsikkoProceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2022
JulkaisupaikkaSingapore
KustantajaIEEE
Sivut1006-1010
Sivumäärä5
ISBN (elektroninen)9781665405409
DOI - pysyväislinkit
TilaJulkaistu - 2022
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaIEEE International Conference on Acoustics, Speech, and Signal Processing - Singapore, Singapore
Kesto: 23 toukok. 202227 toukok. 2022

Julkaisusarja

NimiIEEE International Conference on Acoustics, Speech and Signal Processing
Vuosikerta2022-May
ISSN (painettu)1520-6149

Conference

ConferenceIEEE International Conference on Acoustics, Speech, and Signal Processing
LyhennettäICASSP
Maa/AlueSingapore
KaupunkiSingapore
Ajanjakso23/05/202227/05/2022

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