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    • 8. 发明授权
    • Method and an apparatus for processing an audio signal
    • 用于处理音频信号的方法和装置
    • US08060042B2
    • 2011-11-15
    • US12470832
    • 2009-05-22
    • Hyen O. OhYang Won Jung
    • Hyen O. OhYang Won Jung
    • H03D5/00H04B1/18H04R5/00
    • G10L21/038G10L19/008
    • A signal processing apparatus and method thereof are disclosed. The present invention includes receiving a low frequency downmix signal including a multi channel signal, phase shift information and spatial information corresponding to parameter band of the low frequency downmix signal, generating the multi channel signal by applying the spatial information based on the parameter band to a whole frequency downmix signal, generating estimated phase shift information of a parameter band by using the phase shift information, and generating a phase shift multi channel signal by shifting a phase of the multi channel signal based on the phase shift information and the estimated phase shift information. Accordingly, it is able to efficiently reproduce a phase or delay difference, which is difficult to be efficiently reproduced by a decorrelator, in a manner of shifting a phase of a decoded audio or speech signal based on phase shift information. And, a phase shift is enabled to fit each parameter band of a multi channel signal with raised coding efficiency.
    • 公开了一种信号处理装置及其方法。 本发明包括接收包括多通道信号,相移信息和对应于低频下混合信号的参数频带的空间信息的低频降混信号,通过将基于参数频带的空间信息应用到 整频降混信号,通过使用相移信息产生参数频带的估计相移信息,并且通过基于相移信息和估计的相移信息移位多声道信号的相位来产生相移多声道信号 。 因此,能够以基于相移信息的方式使解码的音频或语音信号的相位移位的方式,有效地再现由解相关器难以高效地再现的相位或延迟差。 并且,相位偏移能够以提高的编码效率来适配多声道信号的每个参数频带。