Apparatus and method of encoding and decoding signals
    11.
    发明授权
    Apparatus and method of encoding and decoding signals 有权
    信号编码和解码的装置和方法

    公开(公告)号:US08428958B2

    公开(公告)日:2013-04-23

    申请号:US12246570

    申请日:2008-10-07

    IPC分类号: G10L19/00

    摘要: A method of encoding an audio signal, where signals including two or more channel signals are downmixed to a mono signal, the mono signal is divided into a low-frequency signal and a high-frequency signal, the low-frequency signal is encoded through algebraic code excited linear prediction (ACELP) or transform coded excitation (TCX), and the high-frequency signal is encoded using the low-frequency signal. A method of decoding of an audio signal, a low-frequency signal encoded through ACELP or TCX is decoded, a high-frequency signal is decoded using the low-frequency signal, the low-frequency signal and the high-frequency signal are combined to generate a mono signal, and the mono signal is upmixed by decoding spatial parameters regarding signals including two or more channel signals.

    摘要翻译: 一种编码音频信号的方法,其中包括两个或更多个信道信号的信号被下混合到单声道信号,单声道信号被分为低频信号和高频信号,低频信号通过代数 代码激励线性预测(ACELP)或变换编码激励(TCX),并且使用低频信号对高频信号进行编码。 解码音频信号的方法,通过ACELP或TCX编码的低频信号进行解码,使用低频信号对低频信号进行解码,将低频信号和高频信号合成为 产生单声道信号,并且单声道信号通过解码关于包括两个或更多个声道信号的信号的空间参数来混合。

    Audio signal quality enhancement apparatus and method
    13.
    发明授权
    Audio signal quality enhancement apparatus and method 有权
    音频信号质量增强装置及方法

    公开(公告)号:US08315862B2

    公开(公告)日:2012-11-20

    申请号:US12479009

    申请日:2009-06-05

    CPC分类号: G10L21/0364

    摘要: An audio signal quality enhancement apparatus and method. The apparatus includes a pitch calculating unit to extract a pitch period of an audio signal, a frequency domain transforming unit to transform the audio signal to a frequency domain, a frequency band dividing unit to classify the transformed audio signal into audio signals for each of the plurality of frequency bands based on the extracted pitch period, and a pitch enhancement unit to determine a gain based on a volume of the transformed audio signal, and to generate an output signal by multiplying each of the classified audio signals with respect to each of the plurality of frequency bands by the gain, thereby enhancing quality of the audio signal.

    摘要翻译: 一种音频信号质量增强装置和方法。 该装置包括:音调计算单元,用于提取音频信号的音调周期;频域变换单元,用于将音频信号变换到频域;频带分割单元,用于将经变换的音频信号分类为音频信号, 基于所提取的音调周期的多个频带,以及音调增强单元,用于基于经变换的音频信号的音量来确定增益,并且通过将每个分类的音频信号相对于每个音频信号相乘来生成输出信号 通过增益获得多个频带,从而提高音频信号的质量。

    CONTEXT-BASED ARITHMETIC ENCODING APPARATUS AND METHOD AND CONTEXT-BASED ARITHMETIC DECODING APPARATUS AND METHOD
    15.
    发明申请
    CONTEXT-BASED ARITHMETIC ENCODING APPARATUS AND METHOD AND CONTEXT-BASED ARITHMETIC DECODING APPARATUS AND METHOD 有权
    基于语境的算术编码设备和方法和基于语境的算术解码设备和方法

    公开(公告)号:US20120221325A1

    公开(公告)日:2012-08-30

    申请号:US13464529

    申请日:2012-05-04

    IPC分类号: G10L19/04

    摘要: Disclosed are a context-based arithmetic encoding apparatus and method and a context-based arithmetic decoding apparatus and method. The context-based arithmetic decoding apparatus may determine a context of a current N-tuple to be decoded, determine a Most Significant Bit (MSB) context corresponding to an MSB symbol of the current N-tuple, and determine a probability model using the context of the N-tuple and the MSB context. Subsequently, the context-based arithmetic decoding apparatus may perform a decoding on an MSB based on the determined probability model, and perform a decoding on a Least Significant Bit (LSB) based on a bit depth of the LSB derived from a process of decoding on an escape code.

    摘要翻译: 公开了一种基于上下文的算术编码装置和方法以及基于上下文的算术解码装置和方法。 基于上下文的算术解码装置可以确定要解码的当前N元组的上下文,确定与当前N元组的MSB符号相对应的最高有效位(MSB)上下文,并使用上下文确定概率模型 的N元组和MSB上下文。 随后,基于上下文的算术解码装置可以基于所确定的概率模型对MSB执行解码,并且基于从解码处理导出的LSB的位深度对最低有效位(LSB)执行解码 一个转义码。

    APPARATUS AND METHOD FOR BANDWIDTH EXTENSION FOR MULTI-CHANNEL AUDIO
    18.
    发明申请
    APPARATUS AND METHOD FOR BANDWIDTH EXTENSION FOR MULTI-CHANNEL AUDIO 有权
    多通道音频带宽扩展的装置和方法

    公开(公告)号:US20120070007A1

    公开(公告)日:2012-03-22

    申请号:US13232696

    申请日:2011-09-14

    IPC分类号: H04R5/00

    摘要: A method and apparatus of effectively encoding and decoding a high-frequency signal of a multi-channel audio are provided. A multi-channel audio decoding apparatus may down-mix a multi-channel audio input signal, expand a number of channels of the down-mixed signal, select at least one of the expanded channel signal, extract a parameter indicating a characteristic relation between the selected signal and the multi-channel audio input signal, and encode the down-mixed signal and the extracted parameter.

    摘要翻译: 提供了一种有效地对多声道音频的高频信号进行编码和解码的方法和装置。 多声道音频解码装置可以对多声道音频输入信号进行降混,扩大下混合信号的信道数,选择扩展信道信号中的至少一个,提取表示该信道的特征关系的参数 选择信号和多声道音频输入信号,并对下混合信号和提取的参数进行编码。

    METHOD AND APPARATUS FOR ADAPTIVELY ENCODING AND DECODING HIGH FREQUENCY BAND
    20.
    发明申请
    METHOD AND APPARATUS FOR ADAPTIVELY ENCODING AND DECODING HIGH FREQUENCY BAND 有权
    用于自适应编码和解码高频带的方法和装置

    公开(公告)号:US20110313778A1

    公开(公告)日:2011-12-22

    申请号:US13220193

    申请日:2011-08-29

    IPC分类号: G10L21/00

    CPC分类号: G10L21/038

    摘要: Provided are a method and apparatus for encoding and decoding an audio signal. According to the present application, a signal of a high frequency band above a preset frequency band is adaptively encoded or decoded in the time domain or in the frequency domain by using a signal of a low frequency band below the preset frequency band. As such, the sound quality of a high frequency signal is not deteriorate even when an audio signal is encoded or decoded by using a small number of bits and thus coding efficiency may be maximized.

    摘要翻译: 提供了一种用于对音频信号进行编码和解码的方法和装置。 根据本申请,通过使用低于预设频带的低频信号,在时域或频域中自适应地编码或解码高于预置频带的高频带的信号。 因此,即使当通过使用少量位来对音频信号进行编码或解码时,高频信号的声音质量也不会恶化,从而可以使编码效率最大化。