公开(公告)号：US09269372B2

公开(公告)日：2016-02-23

申请号：US12674341

申请日：2008-08-26

Applicant: Gustaf Ullberg ,  Anisse Taleb ,  Manuel Briand

Inventor： Gustaf Ullberg ,  Anisse Taleb ,  Manuel Briand

IPC: G10L19/02 ,  G10L19/005 ,  G10L19/028 ,  G10L21/038 ,  G10L19/035

CPC classification number: G10L19/028 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/035 ,  G10L21/038

Abstract: A method for spectrum recovery in spectral decoding of an audio signal, comprises obtaining (210) of an initial set of spectral coefficients representing the audio signal, and determining (212) a transition frequency. The transition frequency is adapted to a spectral content of the audio signal. Spectral holes in the initial set of spectral coefficients below the transition frequency are noise filled (214) and the initial set of spectral coefficients are bandwidth extended (216) above the transition frequency. Decoders and encoders being arranged for performing part of or the entire method are also illustrated.

Abstract translation: 一种用于音频信号的频谱解码中的频谱恢复的方法，包括获得（210）表示所述音频信号的初始频谱系数集合，以及确定（212）转换频率。 转换频率适应于音频信号的频谱内容。 在转换频率之下的初始频谱系数集中的光谱孔被噪声填充（214），并且频谱系数的初始集合在过渡频率之上的带宽扩展（216）。 还示出了用于执行部分或整个方法的解码器和编码器。

公开(公告)号：US20110264454A1

公开(公告)日：2011-10-27

申请号：US12674341

申请日：2008-08-26

Applicant: Gustaf Ullberg ,  Anisse Taleb ,  Manuel Briand

Inventor： Gustaf Ullberg ,  Anisse Taleb ,  Manuel Briand

IPC: G10L19/00

CPC classification number: G10L19/028 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/035 ,  G10L21/038

Abstract: A method for spectrum recovery in spectral decoding of an audio signal, comprises obtaining (210) of an initial set of spectral coefficients representing the audio signal, and determining (212) a transition frequency. The transition frequency is adapted to a spectral content of the audio signal. Spectral holes in the initial set of spectral coefficients below the transition frequency are noise filled (214) and the initial set of spectral coefficients are bandwidth extended (216) above the transition frequency. Decoders and encoders being arranged for performing part of or the entire method are also illustrated.

Abstract translation: 一种用于音频信号的频谱解码中的频谱恢复的方法，包括获得（210）表示所述音频信号的初始频谱系数集合，以及确定（212）转换频率。 转换频率适应于音频信号的频谱内容。 低于转换频率的初始频谱系数集中的光谱孔被噪声填充（214），并且频谱系数的初始集合在过渡频率之上的带宽扩展（216）。 还示出了用于执行部分或整个方法的解码器和编码器。

公开(公告)号：US20110035212A1

公开(公告)日：2011-02-10

申请号：US12674117

申请日：2008-08-26

Applicant: Manuel Briand ,  Anisse Taleb

Inventor： Manuel Briand ,  Anisse Taleb

IPC: G10L21/00 ,  G10L19/02

CPC classification number: G10L19/0204 ,  G10L19/0212 ,  G10L19/035

Abstract: In a method of perceptual transform coding of audio signals in a telecommunication system, performing the steps of determining transform coefficients representative of a time to frequency transformation of a time segmented input audio signal; determining a spectrum of perceptual sub-bands for said input audio signal based on said determined transform coefficients; determining masking thresholds for each said sub-band based on said determined spectrum; computing scale factors for each said sub-band based on said determined masking thresholds, and finally adapting said computed scale factors for each said sub-band to prevent energy loss for perceptually relevant sub-bands.

Abstract translation: 在电信系统中对音频信号的感知变换编码的方法中，执行以下步骤：确定表示时间分段输入音频信号的时间到频率变换的变换系数; 基于所述确定的变换系数确定所述输入音频信号的感知子带的频谱; 基于所述确定的频谱确定每个所述子带的掩蔽阈值; 基于所述确定的掩蔽阈值计算每个所述子带的比例因子，并且最后适应每个所述子带的所述计算的比例因子以防止感知相关子带的能量损失。

公开(公告)号：US20100241437A1

公开(公告)日：2010-09-23

申请号：US12675290

申请日：2008-08-26

Applicant: Anisse Taleb ,  Manuel Briand ,  Gustaf Ullberg

Inventor： Anisse Taleb ,  Manuel Briand ,  Gustaf Ullberg

IPC: G10L19/00

CPC classification number: G10L19/028 ,  G10L19/035 ,  G10L21/0364

Abstract: A method for perceptual spectral decoding comprises decoding of spectral coefficients recovered from a binary flux into decoded spectral coefficients of an initial set of spectral coefficients. The initial set of spectral coefficients are spectrum filled. The spectrum filling comprises noise filling of spectral holes by setting spectral coefficients in the initial set of spectral coefficients not being decoded from the binary flux equal to elements derived from the decoded spectral coefficients. The set of reconstructed spectral coefficients of a frequency domain formed by the spectrum filling is converted into an audio signal of a time domain. A perceptual spectral decoder comprises a noise filler, operating according to the method for perceptual spectral decoding.

Abstract translation: 用于感知频谱解码的方法包括将从二进制通量恢复的频谱系数解码为初始频谱系数集合的解码频谱系数。 频谱系数的初始集合是频谱填充的。 频谱填充包括通过将频谱系数的初始集合中的频谱系数设置为不等于从解码频谱系数导出的元素的二进制通量来解码频谱孔的噪声填充。 通过频谱填充形成的频域的重构频谱系数的集合被转换成时域的音频信号。 感知频谱解码器包括根据用于感知频谱解码的方法操作的噪声填充器。

公开(公告)号：US20080319764A1

公开(公告)日：2008-12-25

申请号：US12087321

申请日：2006-12-13

Applicant: Arnault Nagle ,  Aurelien Sollaud ,  Manuel Briand

Inventor： Arnault Nagle ,  Aurelien Sollaud ,  Manuel Briand

IPC: G10L19/00

CPC classification number: H04L67/303 ,  G10L19/008 ,  H04L65/1069 ,  H04L69/24

Abstract: A method of determining a spatial coding mode for audio data sent by a sender entity (20) to a receiver terminal (10) adapted to receive said audio data in one or more sound reproduction formats. The method comprises the steps of the receiver terminal (10) indicating (1) to the sender entity (20) said reproduction format(s) in a given order of preference and the sender entity (20) determining a mode of spatial coding of the audio data compatible with a reproduction format taken in the order of preference and indicating (2) said reproduction format to the receiver terminal (10). Application to Voice over IP services.

Abstract translation: 确定由发送器实体（20）发送到适于以一种或多种声音再现格式接收所述音频数据的接收器终端（10）的音频数据的空间编码模式的方法。 该方法包括接收终端（10）的步骤，其以给定的优先顺序指示（1）发送者实体（20）所述再现格式，发送方实体（20）确定 音频数据与按照偏好顺序拍摄的再现格式兼容，并且向接收机终端（10）指示（2）所述再现格式。 应用于IP语音业务。