Temat: 43.66.+y - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Precise Psychoacoustic Correction Method Based on Calculation of JND Level
Autorzy:: Piotrowski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/1807748.pdf
Data publikacji:: 2009-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 43.66.-x
43.66.+y
43.60.-c
43.60.+d
Opis:: This paper constitutes a proposal of a method of spectral shaping of the watermark signal without adjusting the interception point based directly on psychoacoustics of the human auditory system and the proposed calculation formula. The proposed calculation formula enables correction of watermark signal both as regards its spectrum shape and adjustment of watermark signal to the host's JND.
Źródło:: Acta Physica Polonica A; 2009, 116, 3; 375-379
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Fidelity Estimation of Watermarked Audio Signals According to the ITU-R BS.1116-1 Standard
Autorzy:: Piotrowski, Z.
Gajewski, P.
Powiązania:: https://bibliotekanauki.pl/articles/1490467.pdf
Data publikacji:: 2012-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 43.75.Zz
43.72.Uv
43.66.-x
43.66.+y
Opis:: The paper describes the method that enables to measure acoustic fidelity of audio signals degraded with digital watermarks. Fidelity measurements of degraded acoustic signals is suitable for such applications as distinguishing whether the acoustic record is signed with a digital watermark (watermarked) or not as well as evaluation of the degradation degree affecting the host signal. The test of subjective assessment according to the recommendation ITU BS.1116-1 is the standard that served as the basis for implementation of a dedicated application within the Matlab environment and for development of the concept how to make this application available as an IP network service to enable assessment of degraded signal by a wider auditorium.
Źródło:: Acta Physica Polonica A; 2012, 121, 1A; A-082-A-085
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Quietness in the Soundscape of the Białowieża National Park
Autorzy:: Wiciak, J.
Mleczko, D.
Ozga, A.
Wszołek, G.
Wierzbicki, J.
Piechowicz, J.
Małecki, P.
Powiązania:: https://bibliotekanauki.pl/articles/1402187.pdf
Data publikacji:: 2015-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 43.66.-x
43.66.+y
87.18.Tt
87.19.lc
43.50.Rq
Opis:: The quietness, defined as the near or complete absence of sound, in the context of the natural environment protection, may be considered a state in which no undesired of foreign sounds occur, and, by analogy to noise, analyzed in two aspects: that pertaining to measurements and the subjective one. The article discusses the lowest levels of sounds recorded at night in the soundscape of the Białowieża Forest. Due to low levels of the examined sounds and the technical problems that occurred while the sounds were being measured and registered, the acoustic examination of the measurement set-up in an anechoic chamber has also been presented. The research is aimed at defining precisely the concept of quietness prevailing in the nature in the subjective aspect by determining both the range of levels and the characteristics of preferred sounds.
Źródło:: Acta Physica Polonica A; 2015, 128, 1A; A-79-A-84
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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