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1. 发明申请

WO2008096313A1 LOW COMPLEXITY PARAMETRIC STEREO DECODER 审中-公开
标题翻译：低复杂参数立体声解码器
公开(公告)号：WO2008096313A1
公开(公告)日：2008-08-14
申请号：PCT/IB2008/050401
申请日：2008-02-04
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , SZCZERBA, Marek, Z. , SCHUIJERS, Erik, G., P. , DILLEN, Paulus, H., A.
发明人： SZCZERBA, Marek, Z. , SCHUIJERS, Erik, G., P. , DILLEN, Paulus, H., A.
IPC分类号： G10L19/00 , G10L19/08 , H04S1/00
CPC分类号： H04R5/04 , G10L19/008 , G10L19/093 , G10L19/16
摘要： A stereo audio decoder with low complexity is provided. A high stereo sound quality can be obtained with a limited computational power and is thus suitable for miniature and mobile equipment. The stereo decoder generates a set of stereo output channels (C1, C2) in response to a parametric audio input including signal parameters (S1) and stereo related parameters (X1). A parameter processor (M) generates two different set of parameters (P1, P2) based on the input signal parameters (S1) thus up-mixing the signal parameters (S1) by altering or manipulating the signal parameters (S1) corresponding to the stereo related parameters (X1). The two different parameters (P1, P2) are finally synthesized by separate signalsynthesizers (SS1, SS2) to form respective stereo output channels (C1, C2). Since the stereo decoding can be performed in the parameter domain instead ofthe spectral domain, the required computational burden is reduced compared to what is known in prior art. Preferably the signalsynthesizers (SS1, SS2) are sinusoidal synthesizers, and preferably the decoder also includes transient and noise synthesizers to generate transient and noise signal portions to be applied to the stereo output channels (C1, C2). Further, different transient and noise signalportions to the output channels (C1, C2) may be provided by applying different gains based on the stereorelated parameter (X1). In preferred embodiments the two parameters (P1, P2) are determined from a current as well as a previous signal parameter input, e.g. by means of an input delay line.
摘要翻译：提供了一种低复杂度的立体声音频解码器。可以以有限的计算能力获得高立体声音质，因此适合于微型和移动设备。立体声解码器响应于包括信号参数（S1）和立体声相关参数（X1）的参数音频输入而产生一组立体声输出声道（C1，C2）。参数处理器（M）基于输入信号参数（S1）生成两组不同的参数（P1，P2），从而通过改变或操纵对应于立体声的信号参数（S1）来上变频信号参数（S1）相关参数（X1）。两个不同的参数（P1，P2）最后由分离的信号合成器（SS1，SS2）合成以形成相应的立体声输出通道（C1，C2）。由于可以在参数域而不是频域执行立体声解码，与现有技术中已知的相比，减少了所需的计算负担。优选地，信号合成器（SS1，SS2）是正弦合成器，并且优选地，解码器还包括瞬态和噪声合成器，以产生要施加到立体声输出通道（C1，C2）的瞬态和噪声信号部分。此外，可以通过基于立体像差参数（X1）应用不同的增益来提供对输出通道（C1，C2）的不同的瞬态和噪声信号分量。在优选实施例中，两个参数（P1，P2）由当前以及先前的信号参数输入（例如，通过输入延迟线。

2. 发明公开

EP2118887A1 LOW COMPLEXITY PARAMETRIC STEREO DECODER 审中-公开
标题翻译： PARAMETRISCHER STEREO DEKODER MIT GERINGERKOMPLEXITÄT
公开(公告)号：EP2118887A1
公开(公告)日：2009-11-18
申请号：EP08702562.3
申请日：2008-02-04
申请人： Koninklijke Philips Electronics N.V.
发明人： SZCZERBA, Marek, Z. , SCHUIJERS, Erik, G., P. , DILLEN, Paulus, H., A.
IPC分类号： G10L19/00 , G10L19/08 , H04S1/00
CPC分类号： H04R5/04 , G10L19/008 , G10L19/093 , G10L19/16
摘要： A stereo audio decoder generates a set of stereo output channels in response to a parametric audio input including signal parameters and stereo related parameters. A parameter processor generates two different set of parameters based on the input signal parameters thus up-mixing the signal parameters by altering or manipulating the signal parameters corresponding to the stereo related parameters. The two different parameters are synthesized by separate signal synthesizers to form respective stereo output channels. The signal synthesizers may be sinusoidal synthesizers, and the decoder also includes transient and noise synthesizers to generate transient and noise signal portions to be applied to the stereo output channels. Further, different transient and noise signal portions to the output channels may be provided by applying different gains based on the stereo related parameter. The two different parameters may be determined from current and previous signal parameter inputs using an input delay line.
摘要翻译：立体声音频解码器响应于包括信号参数和立体声相关参数的参数音频输入而产生一组立体声输出声道。参数处理器基于输入信号参数产生两组不同的参数，从而通过改变或操纵对应于立体声相关参数的信号参数来上变频信号参数。两个不同的参数由单独的信号合成器合成以形成相应的立体声输出通道。信号合成器可以是正弦合成器，并且解码器还包括瞬态和噪声合成器，以产生要施加到立体声输出通道的瞬态和噪声信号部分。此外，可以通过基于立体声相关参数应用不同的增益来提供到输出信道的不同的瞬态和噪声信号部分。可以使用输入延迟线从当前和先前的信号参数输入确定两个不同的参数。

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