Orthogonal transform apparatus, orthogonal transform method, orthogonal transform computer program, and audio decoding apparatus
作者： Shunsuke Takeuchi , Akira Kamano , Yohei Kishi , Takeshi Otani
DOI:
关键词: Mathematical analysis 、 Clenshaw–Curtis quadrature 、 Sign (mathematics) 、 Quadrature mirror filter 、 Interval (mathematics) 、 Fast Fourier transform 、 Inverse trigonometric functions 、 Mathematics 、 Unit (ring theory) 、 Decoding methods
摘要: An orthogonal transform apparatus includes: an interchanging unit which interchanges MDCT coefficients contained in a first half of prescribed interval with second thereof; inverting inverts the sign after interchange; inverse cosine computes real components QMF by applying IMDCT using FFT to and sign-inverted half; sine imaginary IMDST coefficient adjusting combining components.
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