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    Wyświetlanie 1-5 z 5
    Tytuł:
    Efficient Phantom Source Widening
    Autorzy:
    Zotter, F.
    Frank, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/177701.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    source widening
    phantom source
    decorrelation
    IACC
    inter-aural cross correlation coefficient
    Opis:
    We present a highly efficient filter structure to create power-complementary filter pairs for phantom source widening. It either introduces frequency-dependent phase or amplitude differences in a pair of loudspeaker signals. We evaluate how the perceptual effect is influenced by off-center listening positions in a standard ±30o loudspeaker setup. The evaluation of the phantom source widening effect is based on measurements of the inter-aural cross-correlation coefficient (IACC), which is justified by its pronounced correlation to the perceived phantom source width in prior listening test results.
    Źródło:
    Archives of Acoustics; 2013, 38, 1; 27-37
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic and environmental correlation and path coefficient analysis of fruit yield per bush and other traits in black currants [Ribes nigrum L.]
    Autorzy:
    Madry, W
    Pluta, S.
    Zurawicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2042171.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    F1 hybrid
    fruit yield
    correlation coefficient
    bush
    Ribes nigrum
    diallel cross
    black currant
    Źródło:
    Journal of Applied Genetics; 2000, 41, 4; 221-236
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    GOP Structure Adaptable to the Location of Shot Cuts
    Autorzy:
    Krulikovská, L.
    Polec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/227351.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    shot cut detection
    Pearson correlation coefficient
    motion estimation
    adaptive threshold
    video encoding
    adaptive GOP structure
    Opis:
    In this paper we present a novel two stage algorithm for improving video coding efficiency. The proposed method combines video cut detection and adaptive GOP structure. At first, we have proposed a new technique of frames' comparison for the shot cut detection. The majority of existing methods compare pairs of successive frames. We compare actual frame with its motion estimated prediction. We also present adaptive threshold. The efficiency of novel technique for video cut detection was confirmed through experiment and compared to the commonly used ones in the terms of recall and precision. The next step is to situate I frames to the positions of detected cuts during the process of video encoding. Finally the proposed method is verified by simulations and the obtained results are compared with fixed GOP structures of sizes 4, 8, 12, 16, 32, 64, 128 and GOP structure with length of entire video. Proposed method achieved the gain in bit rate from 15,33% to 50,59%, while not degrading PSNR in comparison to simulated fixed GOP structures.
    Źródło:
    International Journal of Electronics and Telecommunications; 2012, 58, 2; 129-134
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Source Width of Frontal Phantom Sources: Perception, Measurement, and Modeling
    Autorzy:
    Frank, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/176909.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    source width
    phantom source
    stereophony
    IACC
    inter-aural cross correlation coefficient
    LF
    lateral energy fraction
    energy vector
    Opis:
    Phantom sources are known to be perceived similar to real sound sources but with some differences. One of the differences is an increase of the perceived source width. This article discusses the perception, measurement, and modeling of source width for frontal phantom sources with different symmetrical arrangements of up to three active loudspeakers. The perceived source width is evaluated on the basis of a listening test. The test results are compared to technical measures that are applied in room acoustics: the inter-aural cross correlation coefficient (IACC) and the lateral energy fraction (LF). Adaptation of the latter measure makes it possible to predict the results by considering simultaneous sound incidence. Finally, a simple model is presented for the prediction of the perceived source width that does not require acoustic measurements as it is solely based on the loudspeaker directions and gains.
    Źródło:
    Archives of Acoustics; 2013, 38, 3; 311-319
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of Mold Filling Ability and Volume Deficit Characteristics of Cast Al-Si Alloys
    Autorzy:
    Santhi, S.
    Vadayar, S.
    Srinivasan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/382225.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast Al-Si
    mold filling
    volume deficit
    pouring temperature
    correlation coefficient
    mold coat
    stop Al-Si
    wypełnianie formy
    temperatura wylewu
    współczynnik korelacji
    Opis:
    Production of defect free castings requires good understanding of casting characteristics like mold filling ability and volume deficit characteristic. Pin test piece with cylindrical cores proposed by Engler and Ellerbrok was used to study the mold filling ability. Volume deficit characteristics experiments were conducted using the method designed by Engler. Alloy composition, Mold coat and Pouring temperature were considered as process parameters for the present study and experimental plan has been taken up through design of experiments. The alloy composition is most significant in influencing the mold filling ability, where as pouring temperature is for volume deficit. The Correlation Co-efficient value obtained is -0.98901 indicating strong a negative relation between mold filling ability and volume deficit characteristics. Negative values indicate a relationship between mold filling ability and volume deficit such that as values for mold filling ability increase, for volume deficit decrease.
    Źródło:
    Archives of Foundry Engineering; 2019, 3; 55-65
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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