专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2011124608A1 MDCT-BASED COMPLEX PREDICTION STEREO CODING 审中-公开
标题翻译：基于MDCT的复杂预测立体声编码
公开(公告)号：WO2011124608A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/055350
申请日：2011-04-06
申请人： DOLBY INTERNATIONAL AB , CARLSSON, Pontus , PURNHAGEN, Heiko , VILLEMOES, Lars
发明人： CARLSSON, Pontus , PURNHAGEN, Heiko , VILLEMOES, Lars
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/06 , G10L19/167 , G10L25/12 , H04S3/008 , H04S2400/01
摘要： 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 upmixing can be suspended responsive to control data.
摘要翻译：本发明提供了在频域中使用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。响应于控制数据可以暂停上混合。

2. 发明申请

WO2011124616A1 MDCT-BASED COMPLEX PREDICTION STEREO CODING 审中-公开
标题翻译：基于MDCT的复杂预测立体声编码
公开(公告)号：WO2011124616A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/055369
申请日：2011-04-06
申请人： DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/06 , G10L19/167 , G10L25/12 , H04S3/008 , H04S2400/01
摘要： 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.
摘要翻译：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且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。

3. 发明申请

WO2012164048A3 VIDEO STABILISATION 审中-公开
标题翻译：视频稳定
公开(公告)号：WO2012164048A3
公开(公告)日：2013-03-21
申请号：PCT/EP2012060315
申请日：2012-05-31
申请人： SKYPE , JEFREMOV ANDREI , ZHAO DAVID , CARLSSON PONTUS , SABLIN SERGEY
发明人： JEFREMOV ANDREI , ZHAO DAVID , CARLSSON PONTUS , SABLIN SERGEY
IPC分类号： H04N5/232
CPC分类号： H04N5/23264 , H04N5/23258 , H04N5/23267 , H04N5/3454
摘要： Method, device and computer program product for stabilising a video signal. A plurality of frames of the video signal are captured using a camera. A motion sensor associated with the camera is used to generate a plurality of samples representing motion of the camera. The samples are used to determine a displacement of the camera between a first time and a second time, wherein the first time corresponds to an exposure time midpoint of a first frame of the video signal and the second time corresponds to an exposure time midpoint of a second frame of the video signal. The determined displacement is used to compensate for motion in the video signal between the first and second frames caused by the motion of the camera, to thereby stabilise the video signal.
摘要翻译：用于稳定视频信号的方法，设备和计算机程序产品。使用相机捕获多个视频信号帧。使用与相机相关联的运动传感器来产生表示相机运动的多个样本。样本用于确定相机在第一时间和第二时间之间的位移，其中第一时间对应于视频信号的第一帧的曝光时间中点，而第二时间对应于视频信号的曝光时间中点视频信号的第二帧。确定的位移用于补偿由相机的运动引起的第一帧和第二帧之间的视频信号中的运动，从而稳定视频信号。

4. 发明申请

WO2010105926A2 ADVANCED STEREO CODING BASED ON A COMBINATION OF ADAPTIVELY SELECTABLE LEFT/RIGHT OR MID/SIDE STEREO CODING AND OF PARAMETRIC STEREO CODING 审中-公开
标题翻译：基于自适应可选左/右或中/侧立体声编码和参数立体声编码组合的高级立体声编码
公开(公告)号：WO2010105926A2
公开(公告)日：2010-09-23
申请号：PCT/EP2010052866
申请日：2010-03-05
申请人： DOLBY INT AB , PURNHAGEN HEIKO , CARLSSON PONTUS , KJOERLING KRISTOFER
发明人： PURNHAGEN HEIKO , CARLSSON PONTUS , KJOERLING KRISTOFER
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/008 , G10L19/18 , H04S3/02 , H04S5/00 , H04S5/005 , H04S5/02 , H04S2400/01 , H04S2400/03 , H04S2420/03
摘要： The application relates to audio encoder and decoder systems. An embodiment of the encoder system comprises a downmix stage for generating a downmix signal and a residual signal based on a stereo signal. In addition, the encoder system comprises a parameter determining stage for determining parametric stereo parameters such as an inter-channel intensity difference and an inter-channel cross-correlation. Preferably, the parametric stereo parameters are time- and frequency-variant. Moreover, the encoder system comprises a transform stage. The transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding is selectable. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-variant.
摘要翻译：该应用涉及音频编码器和解码器系统。编码器系统的实施例包括用于基于立体声信号来生成下混合信号和残余信号的下混合级。另外，编码器系统包括用于确定参数立体声参数（诸如声道间强度差和声道间互相关）的参数确定级。优选地，参数化立体声参数是时间和频率变化的。此外，编码器系统包括变换阶段。变换级通过基于缩混信号和残差信号执行变换来生成伪左/右立体声信号。伪立体声信号由感知立体声编码器处理。对于立体声编码，可以选择左/右编码或中/侧编码。优选地，左/右立体声编码和中/立体声编码之间的选择是时间和频率变化的。

5. 发明申请

WO2011124621A1 MDCT-BASED COMPLEX PREDICTION STEREO CODING 审中-公开
标题翻译：基于MDCT的复杂预测立体声编码
公开(公告)号：WO2011124621A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/055374
申请日：2011-04-06
申请人： DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
IPC分类号： G10L19/00 , H04B1/66
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/06 , G10L19/167 , G10L25/12 , H04S3/008 , H04S2400/01
摘要： 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 applying independent bandwidth limits for the input channels.
摘要翻译：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。该方法包括对输入通道应用独立的带宽限制。

6. 发明申请

WO2011124473A1 AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION 审中-公开
标题翻译：音频编码器，音频解码器和使用复杂预测处理多通道音频信号的相关方法
公开(公告)号：WO2011124473A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/054485
申请日：2011-03-23
申请人： FRAUNHOFER-GESELLSCHAFT DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
IPC分类号： G10L19/00 , G10L19/04
CPC分类号： G10L19/04 , G10L19/008
摘要： An audio encoder and an audio decoder are based on a combination of two audio channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208). A decoder uses the prediction residual signal, the first combination signal and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.
摘要翻译：音频编码器和音频解码器基于两个音频通道（201,202）的组合，以获得作为中间信号的第一组合信号（204）和可以使用预测侧信号导出的残留信号（205）从中间信号导出。基于优化目标（208），将第一组合信号和预测残差信号与由优化器（207）导出的预测信息（206）一起编码（209）并写入（212）到数据流（213）中。解码器使用预测残差信号，第一组合信号和预测信息来导出解码的第一信道信号和解码的第二信道信号。在编码器示例或解码器示例中，可以应用实 - 虚变换来估计第一组合信号的频谱的虚部。为了计算在推导预测残差信号中使用的预测信号，将实值第一组合信号乘以复数预测信息的实部，并将第一组合信号的估计虚部乘以假想部分复杂的预测信息。

7. 发明申请

WO2009086918A1 AUDIO ENCODER AND DECODER 审中-公开
标题翻译：音频编码器和解码器
公开(公告)号：WO2009086918A1
公开(公告)日：2009-07-16
申请号：PCT/EP2008/011144
申请日：2008-12-30
申请人： DOLBY SWEDEN AB , HEDELIN, Per, Henrik , CARLSSON, Pontus, Jan , SAMUELSSON, Jonas, Leif , SCHUG, Michael
发明人： HEDELIN, Per, Henrik , CARLSSON, Pontus, Jan , SAMUELSSON, Jonas, Leif , SCHUG, Michael
IPC分类号： G10L19/00
CPC分类号： G10L19/26 , G10L19/008 , G10L19/032 , G10L19/035
摘要： The present invention teaches a new audio coding system that can code both general audio and speech signals well at low bit rates. A proposed audio coding system comprises linear prediction unit for filtering an input signal based on an adaptive filter; a transformation unit for transforming a frame of the filtered input signal into a transform domain; and a quantization unit for quantizing the transform domain signal. The quantization unit decides, based on input signal characteristics, to encode the transform domain signal with a model-based quantizer or a non-model-based quantizer. Preferably, the decision is based on the frame size applied by the transformation unit.
摘要翻译：本发明教导了一种新的音频编码系统，其可以以低比特率良好地对一般音频和语音信号进行编码。所提出的音频编码系统包括用于基于自适应滤波器对输入信号进行滤波的线性预测单元; 变换单元，用于将经滤波的输入信号的帧变换为变换域; 以及用于量化变换域信号的量化单元。量化单元基于输入信号特性来决定用基于模型的量化器或非基于模型的量化器对变换域信号进行编码。优选地，该决定基于由变换单元应用的帧大小。

8. 发明申请

WO2012164048A2 VIDEO STABILISATION 审中-公开
标题翻译：视频稳定
公开(公告)号：WO2012164048A2
公开(公告)日：2012-12-06
申请号：PCT/EP2012/060315
申请日：2012-05-31
申请人： SKYPE , JEFREMOV, Andrei , ZHAO, David , CARLSSON, Pontus , SABLIN, Sergey
发明人： JEFREMOV, Andrei , ZHAO, David , CARLSSON, Pontus , SABLIN, Sergey
IPC分类号： H04N5/232
CPC分类号： H04N5/23264 , H04N5/23258 , H04N5/23267 , H04N5/3454
摘要： Method, device and computer program product for stabilising a video signal. A plurality of frames of the video signal are captured using a camera. A motion sensor associated with the camera is used to generate a plurality of samples representing motion of the camera. The samples are used to determine a displacement of the camera between a first time and a second time, wherein the first time corresponds to an exposure time midpoint of a first frame of the video signal and the second time corresponds to an exposure time midpoint of a second frame of the video signal. The determined displacement is used to compensate for motion in the video signal between the first and second frames caused by the motion of the camera, to thereby stabilise the video signal.
摘要翻译：用于稳定视频信号的方法，设备和计算机程序产品。使用相机捕获多个视频信号帧。使用与相机相关联的运动传感器来产生表示相机运动的多个样本。样本用于确定相机在第一时间和第二时间之间的位移，其中第一时间对应于视频信号的第一帧的曝光时间中点，而第二时间对应于视频信号的曝光时间中点视频信号的第二帧。确定的位移用于补偿由相机的运动引起的第一帧和第二帧之间的视频信号中的运动，从而稳定视频信号。

9. 发明申请

WO2010105926A3 ADVANCED STEREO CODING BASED ON A COMBINATION OF ADAPTIVELY SELECTABLE LEFT/RIGHT OR MID/SIDE STEREO CODING AND OF PARAMETRIC STEREO CODING 审中-公开
公开(公告)号：WO2010105926A3
公开(公告)日：2010-09-23
申请号：PCT/EP2010/052866
申请日：2010-03-05
申请人： DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , KJÖRLING, Kristofer
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , KJÖRLING, Kristofer
IPC分类号： G10L19/00
摘要： The application relates to audio encoder and decoder systems. An embodiment of the encoder system comprises a downmix stage for generating a downmix signal and a residual signal based on a stereo signal. In addition, the encoder system comprises a parameter determining stage for determining parametric stereo parameters such as an inter-channel intensity difference and an inter-channel cross-correlation. Preferably, the parametric stereo parameters are time- and frequency-variant. Moreover, the encoder system comprises a transform stage. The transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding is selectable. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-variant.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式