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    • 2. 发明授权
    • MDCT-based complex prediction stereo coding
    • 基于MDCT的复合预测立体声编码
    • US09159326B2
    • 2015-10-13
    • US13638900
    • 2011-04-06
    • Heiko PurnhagenPontus CarlssonLars Villemoes
    • Heiko PurnhagenPontus CarlssonLars Villemoes
    • H04R5/00G10L19/008
    • G10L19/008G10L19/0212G10L19/06G10L19/167G10L25/12H04S3/008H04S2400/01
    • The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency domain representation of the second input channel and a complex prediction coefficient. The method comprises performing frequency-domain modifications selectively before or after upmixing.
    • 本发明提供使用频域中的复数预测的立体声编码和解码的方法和装置。 在一个实施例中,一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并包括两个输入声道的第一频域表示的解码方法包括上混合步骤:(i)计算第二频率 - 第一输入通道的域表示; 以及(ii)基于第一输入通道的第一和第二频域表示,第二输入通道的第一频域表示和复数预测系数来计算输出通道。 该方法包括在混合之前或之后选择性地执行频域修改。
    • 6. 发明申请
    • MDCT-Based Complex Prediction Stereo Coding
    • 基于MDCT的复合预测立体声编码
    • US20130266145A1
    • 2013-10-10
    • US13638900
    • 2011-04-06
    • Heiko PurnhagenPontus CarlssonLars Villemoes
    • Heiko PurnhagenPontus CarlssonLars Villemoes
    • G10L19/008
    • G10L19/008G10L19/0212G10L19/06G10L19/167G10L25/12H04S3/008H04S2400/01
    • The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency domain representation of the second input channel and a complex prediction coefficient. The method comprises performing frequency-domain modifications selectively before or after upmixing.
    • 本发明提供使用频域中的复数预测的立体声编码和解码的方法和装置。 在一个实施例中,一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并包括两个输入声道的第一频域表示的解码方法包括上混合步骤:(i)计算第二频率 - 第一输入通道的域表示; 以及(ii)基于第一输入通道的第一和第二频域表示,第二输入通道的第一频域表示和复数预测系数来计算输出通道。 该方法包括在混合之前或之后选择性地执行频域修改。
    • 10. 发明授权
    • Method for representing multi-channel audio signals
    • 表示多声道音频信号的方法
    • US07986789B2
    • 2011-07-26
    • US11549963
    • 2006-10-16
    • Heiko PurnhagenLars VillemoesJonas EngdegardJonas RoedenKristofer Kjoerling
    • Heiko PurnhagenLars VillemoesJonas EngdegardJonas RoedenKristofer Kjoerling
    • H04R5/00G06F17/00
    • H04R5/00G10L19/008G10L19/0204G10L19/032G10L19/167G10L19/26H04S3/02H04S5/00H04S2400/01H04S2400/03
    • A multi-channel input signal having at least three original channels is represented by a parameter representation of the multi-channel signal. A first balance parameter, a first coherence parameter, or a first inter-channel time difference between a first channel pair and a second balance parameter, or a second coherence parameter, or a second inter-channel time difference parameter between a second channel pair are calculated. This set of parameters is the parameter representation of the original signals. The first channel pair has two channels, which are different from two channels of a second channel pair. Furthermore, each channel of the two channel pairs is one of the original channels, or a weighted combination of the original channels, and the first channel pair and the second channel pair include information on the three original channels. For multi-channel reconstruction purposes, the parameters are used in addition to down-mixing information to generate a selectable number of output channels in a scalable fashion.
    • 具有至少三个原始信道的多信道输入信号由多信道信号的参数表示来表示。 在第二通道对之间的第一通道对和第二平衡参数之间的第一平衡参数,第一相干参数或第一通道间时间差或第二相干参数或第二通道间差参数是 计算。 这组参数是原始信号的参数表示。 第一通道对具有两个通道,它们与第二通道对的两个通道不同。 此外,两个信道对的每个信道是原始信道之一或原始信道的加权组合,并且第一信道对和第二信道对包括关于三个原始信道的信息。 对于多通道重建的目的,除了降混信息之外还使用这些参数,以便以可缩放的方式生成可选数量的输出通道。