公开(公告)号：US20170025130A1

公开(公告)日：2017-01-26

申请号：US15286030

申请日：2016-10-05

Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

Inventor： Srikanth NAGISETTY ,  Zongxian LIU

IPC: G10L19/02 ,  G10L19/24 ,  G10L19/16

CPC classification number: G10L19/0204 ,  G10L19/035 ,  G10L19/167 ,  G10L19/24 ,  G10L21/038 ,  G10L25/18

Abstract: An audio signal decoding apparatus is provided that includes a receiver that receives an encoded information, a memory, and a processor that demultiplexes low-band encoding parameters, index information, and scale factor information from the encoded information. The processor also decodes the low-band encoding parameters to obtain a synthesized low frequency spectrum, replicates a high frequency subband spectrum based on the index information using the synthesized low frequency spectrum, and adjusts an amplitude of the replicated high frequency subband spectrum using the scale factor information. The processor further estimates a frequency of a harmonic component in the synthesized low frequency spectrum, adjusts a frequency of a harmonic component in the high frequency subband spectrum using the estimated harmonic frequency spectrum, and generates an output signal using the synthesized low frequency spectrum and the high frequency subband spectrum.

Abstract translation: 提供一种音频信号解码装置，其包括接收编码信息的接收机，存储器，以及从编码信息解复用低频编码参数，索引信息和比例因子信息的处理器。 处理器还解码低频编码参数以获得合成的低频谱，使用合成的低频谱根据索引信息复制高频子带频谱，并使用比例调整复制的高频子带频谱的幅度 因素信息。 处理器进一步估计合成低频谱中的谐波分量的频率，使用估计的谐波频谱调整高频子带频谱中的谐波分量的频率，并使用合成低频谱产生输出信号，并且 高频子带频谱。