公开(公告)号：US08326641B2

公开(公告)日：2012-12-04

申请号：US12407434

申请日：2009-03-19

申请人： Geun-Bae Song ,  Pavel Martynovich ,  Chul-Yong Ahn

发明人： Geun-Bae Song ,  Pavel Martynovich ,  Chul-Yong Ahn

IPC分类号： G10L19/00 ,  G10L21/00

CPC分类号： G10L19/0204 ,  G10L19/24 ,  G10L21/038

摘要： An apparatus and method for encoding and decoding using mutual information between a high band signal and a low band signal to increase a coding efficiency in a portable terminal are provided. The apparatus includes a bandwidth extender for extracting auxiliary information relating to a characteristic of a high band signal using the high band signal and a low band signal and an encoder for encoding residual high band signal obtained by subtracting auxiliary information acquired from the low band signal from auxiliary information acquired from the high band signal.

摘要翻译： 提供了一种使用高频带信号和低频带信号之间的互信息进行编码和解码以提高便携式终端中的编码效率的装置和方法。 该装置包括：带宽扩展器，用于使用高频带信号和低频带信号提取与高频带信号的特性有关的辅助信息;以及编码器，用于对通过从低频带信号中获取的辅助信息进行减法而获得的残余高频带信号进行编码 从高频带信号获取的辅助信息。

公开(公告)号：US20070258385A1

公开(公告)日：2007-11-08

申请号：US11790368

申请日：2007-04-25

申请人： Jung-Woo Ku ,  Austin Kim ,  Ho-Chong Park ,  Jae-Bum Kim ,  Chul-Yong Ahn ,  Pavel Martynovich

发明人： Jung-Woo Ku ,  Austin Kim ,  Ho-Chong Park ,  Jae-Bum Kim ,  Chul-Yong Ahn ,  Pavel Martynovich

IPC分类号： H04L12/26

CPC分类号： H04L12/66

摘要： An apparatus and method for recovering lost voice packets are provided, in which a packet loss detector determines whether a received packet has been lost, packet information storage stores voice information of previous voice packets and voice information of the received voice packet, a packet error corrector measures the voice information of the received voice packet, stores the measured voice information in the packet information storage, corrects the voice information when necessary, and generates a corrected voice packet, if the received voice packet is normal, and a packet loss recoverer recovers the voice information of the received voice packet using the voice information of previous voice packets stored in the packet information storage and generates a recovered voice packet, if the received voice packet has been lost.

摘要翻译： 提供了一种用于恢复丢失语音分组的装置和方法，其中分组丢失检测器确定接收的分组是否已经丢失，分组信息存储存储先前语音分组的语音信息和接收的语音分组的语音信息，分组误差校正器 测量接收到的语音分组的语音信息，将测量的语音信息存储在分组信息存储器中，必要时校正语音信息，并且如果接收的语音分组正常，则生成校正的语音分组，并且分组丢失恢复器恢复 使用存储在分组信息存储器中的先前语音分组的语音信息的接收到的语音分组的语音信息，并且如果接收到的语音分组已经丢失，则生成恢复的语音分组。

公开(公告)号：US08019603B2

公开(公告)日：2011-09-13

申请号：US12062034

申请日：2008-04-03

申请人： Pavel Martynovich ,  Austin Kim ,  Jae-Bum Kim ,  Chul-Yong Ahn

发明人： Pavel Martynovich ,  Austin Kim ,  Jae-Bum Kim ,  Chul-Yong Ahn

IPC分类号： G10L21/02

CPC分类号： G10L19/26 ,  G10L21/0364

摘要： An apparatus and a method for enhancing speech intelligibility in a mobile terminal. A complex spectrum calculator calculates complex spectra of one input frame of an input speech signal by Fourier transform, a speech level calculator calculates its instant levels, an average speech level calculator calculates an average speech level of the speech frame using the instant levels, if the input frame is a speech frame, a scaling factor calculator calculates scaling factors by comparing the average speech level with the instant levels, an HPF characteristic calculator calculates amplitude characteristics using the scaling factors, a HPF high-pass-filters the complex spectra using the amplitude characteristics, a synthesizer converts high-pass-filtered signals to time signals by inverse Fourier transform and synthesizes the time signals, and a combiner outputs an enhanced intelligibility speech signal by combining the synthesized time signal with the input frame.

摘要翻译： 一种用于增强移动终端中的语音清晰度的装置和方法。 复频谱计算器通过傅里叶变换计算输入语音信号的一个输入帧的复谱，语音电平计算器计算其即时电平，平均语音电平计算器使用即时电平计算语音帧的平均语音电平，如果 输入帧是语音帧，缩放因子计算器通过将平均语音电平与即时电平进行比较来计算缩放因子，HPF特征计算器使用缩放因子计算幅度特性，HPF使用振幅来对复谱进行高通滤波 特征，合成器通过逆傅里叶变换将高通滤波信号转换成时间信号，并合成时间信号，组合器通过将合成时间信号与输入帧组合而输出增强的可懂度语音信号。

公开(公告)号：US08520536B2

公开(公告)日：2013-08-27

申请号：US11790368

申请日：2007-04-25

申请人： Jung-Woo Ku ,  Austin Kim ,  Ho-Chong Park ,  Jae-Bum Kim ,  Chul-Yong Ahn ,  Pavel Martynovich

发明人： Jung-Woo Ku ,  Austin Kim ,  Ho-Chong Park ,  Jae-Bum Kim ,  Chul-Yong Ahn ,  Pavel Martynovich

IPC分类号： H04L12/26

CPC分类号： H04L12/66

摘要： An apparatus and method for recovering lost voice packets are provided, in which a packet loss detector determines whether a received packet has been lost, packet information storage stores voice information of previous voice packets and voice information of the received voice packet, a packet error corrector measures the voice information of the received voice packet, stores the measured voice information in the packet information storage, corrects the voice information when necessary, and generates a corrected voice packet, if the received voice packet is normal, and a packet loss recoverer recovers the voice information of the received voice packet using the voice information of previous voice packets stored in the packet information storage and generates a recovered voice packet, if the received voice packet has been lost.

摘要翻译： 提供了一种用于恢复丢失语音分组的装置和方法，其中分组丢失检测器确定接收的分组是否已经丢失，分组信息存储存储先前语音分组的语音信息和接收的语音分组的语音信息，分组误差校正器 测量接收到的语音分组的语音信息，将测量的语音信息存储在分组信息存储器中，必要时校正语音信息，并且如果接收的语音分组正常，则生成校正的语音分组，并且分组丢失恢复器恢复 使用存储在分组信息存储器中的先前语音分组的语音信息的接收到的语音分组的语音信息，并且如果接收到的语音分组已经丢失，则生成恢复的语音分组。

公开(公告)号：US20070088546A1

公开(公告)日：2007-04-19

申请号：US11519219

申请日：2006-09-12

申请人： Geun-Bae Song ,  Jae-Bum Kim ,  Chul-Yong Ahn ,  Ho-Chong Park

发明人： Geun-Bae Song ,  Jae-Bum Kim ,  Chul-Yong Ahn ,  Ho-Chong Park

IPC分类号： G10L15/20

CPC分类号： G10L19/265

摘要： An apparatus and a method for transmitting audio signals in such a manner that audio signals transmitted and received in a mobile telephone network are preprocessed before being inputted to a voice encoder are provided. The audio signals are preprocessed by using an optimal filter gain based on error signals obtained when the audio signals are preprocessed and outputted by the voice encoder and the synthesizer. Therefore, the sound quality of the audio signals is hardly degraded by the voice encoder.

摘要翻译： 提供一种用于以这样的方式发送音频信号的装置和方法，即在输入到语音编码器之前，在移动电话网络中发送和接收的音频信号被预处理。 音频信号通过使用基于当音频信号被语音编码器和合成器预处理和输出时获得的误差信号使用最佳滤波器增益来预处理。 因此，语音编码器几乎不会降低音频信号的声音质量。