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    • 4. 发明授权
    • High-frequency interpolation device and high-frequency interpolation method
    • 高频插补装置和高频插补方法
    • US08554349B2
    • 2013-10-08
    • US12680899
    • 2008-10-22
    • Takeshi Hashimoto
    • Takeshi Hashimoto
    • G06F17/00H03G5/00
    • G10L21/038
    • It is possible to generate an interpolation signal in which spectrum in frequency characteristics develops in a continuous manner according to a reproduced music without increasing the sampling rate (sampling frequency) in up-sampling processing. A high-frequency interpolation device 1 includes: a frequency band determination section 2 that determines a bandwidth type of an audio signal as a frequency band determination value preset for each bandwidth according to the frequency characteristics of the audio signal; and an interpolation signal generation section 3 that selects a filter coefficient of a high-pass filter in accordance with the frequency band determination value 2, performs filtering for the audio signal by using the high-pass filter having the selected filter coefficient, and generates a high-frequency interpolation signal for the audio signal.
    • 可以生成内插信号,其中频率特性中的频谱根据再现的音乐以连续的方式发展,而不增加上采样处理中的采样率(采样频率)。 高频内插装置1包括:频带确定部分2,其根据音频信号的频率特性,将音频信号的带宽类型确定为针对每个带宽预设的频带确定值; 以及根据频带判定值2选择高通滤波器的滤波器系数的插值信号生成部3,通过使用具有选择的滤波器系数的高通滤波器对音频信号进行滤波,并生成 用于音频信号的高频插值信号。