Title:
高調波転換
Document Type and Number:
Japanese Patent JP6638110
Kind Code:
B2
Abstract:
The present invention relates to transposing signals in time and/or frequency and in particular to coding of audio signals. More particular, the present invention relates to high frequency reconstruction (HFR) methods including a frequency domain harmonic transposer. A method and system for generating a transposed output signal from an input signal using a transposition factor T is described. The system comprises an analysis window of length La, extracting a frame of the input signal, and an analysis transformation unit of order M transforming the samples into M complex coefficients. M is a function of the transposition factor T. The system further comprises a nonlinear processing unit altering the phase of the complex coefficients by using the transposition factor T, a synthesis transformation unit of order M transforming the altered coefficients into M altered samples, and a synthesis window of length Ls, generating a frame of the output signal.
More Like This:
Inventors:
Exstrand, pail
Willemoes, Lars, Faruk
Willemoes, Lars, Faruk
Application Number:
JP2019148472A
Publication Date:
January 29, 2020
Filing Date:
August 13, 2019
Export Citation:
Assignee:
Dolby International Arb
International Classes:
G10L21/0388
Domestic Patent References:
| JP2008519290A | ||||
| JP2001521648A | ||||
| JP2005510772A |
Foreign References:
| WO2009029032A2 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki