公开(公告)号：US08711233B2

公开(公告)日：2014-04-29

申请号：US13296941

申请日：2011-11-15

申请人： Andrei Jefremov ,  David Zhao ,  Pontus Carlsson

发明人： Andrei Jefremov ,  David Zhao ,  Pontus Carlsson

IPC分类号： H04N5/228

CPC分类号： H04N5/23264 ,  H04N5/23258 ,  H04N5/23267 ,  H04N5/3454

摘要： Method, device and computer program product for stabilizing 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 stabilize 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的帧。 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。

公开(公告)号：US20130101030A1

公开(公告)日：2013-04-25

申请号：US13341464

申请日：2011-12-30

申请人： Pontus Carlsson ,  Andrei Jefremov ,  Sergey Sablin ,  David Zhao

发明人： Pontus Carlsson ,  Andrei Jefremov ,  Sergey Sablin ,  David Zhao

IPC分类号： H04N7/26

CPC分类号： H04N19/58 ,  H04N19/423 ,  H04N19/46 ,  H04N19/573 ,  H04N19/70

摘要： In an embodiment, a method of transmitting video data includes at an encoder encoding the video data as a plurality of frames, including reference frames and intermediate frames, at least some of which are encoded based on multiple reference frames; at the encoder maintaining for each frame a current list of reference frames; and transmitting the plurality of frames, each frame being transmitted in association with a current list of reference frames for that frame.

摘要翻译： 在一个实施例中，传输视频数据的方法包括编码视频数据作为多个帧的编码器，包括参考帧和中间帧，其中至少一些基于多个参考帧进行编码; 在编码器处为每个帧维护参考帧的当前列表; 并且发送多个帧，每个帧与该帧的参考帧的当前列表相关联地发送。

公开(公告)号：US20130058405A1

公开(公告)日：2013-03-07

申请号：US13274881

申请日：2011-10-17

申请人： David Zhao ,  Mattias Nilsson ,  Renat Vafin ,  Andrei Jefremov ,  Sören Vang Andersen ,  Pontus Carlsson

发明人： David Zhao ,  Mattias Nilsson ,  Renat Vafin ,  Andrei Jefremov ,  Sören Vang Andersen ,  Pontus Carlsson

IPC分类号： H04N7/12

CPC分类号： H04N19/58 ,  H04N19/107 ,  H04N19/147 ,  H04N19/166 ,  H04N19/176 ,  H04N19/19 ,  H04N19/89

摘要： A method of performing a rate-distortion optimization process comprising, for each of a plurality of target image portions to be encoded in each of a plurality of frames, selecting a preferred one of a set of encoding modes by optimizing a function comprising an estimate of distortion for the target image portion and a measure of bit rate required to encode the target image portion, wherein the estimate of distortion is based on source coding distortion and an estimate of a distortion that would be experienced due to possible loss over the channel; encoding the target image portion into the encoded video stream using the selected encoding mode; and transmitting the encoded video stream over the channel. The rate-distortion optimization process for a current one of the frames is performed in dependence on feedback received from the receiving terminal based on an earlier one of the frames.

摘要翻译： 一种执行速率失真优化处理的方法，包括对于要在多个帧中的每一帧中编码的多个目标图像部分中的每一个，通过优化包括估计的估计的函数来选择一组编码模式中的优选的一个 用于目标图像部分的失真和对目标图像部分进行编码所需的比特率的度量，其中失真估计基于源编码失真和由于信道上可能的损失而将经历的失真的估计; 使用所选择的编码模式将目标图像部分编码成编码视频流; 以及通过所述信道发送所述经编码的视频流。 根据基于较早的帧之一从接收终端接收到的反馈来执行当前帧之一的速率失真优化处理。

公开(公告)号：US09338473B2

公开(公告)日：2016-05-10

申请号：US13274881

申请日：2011-10-17

申请人： David Zhao ,  Mattias Nilsson ,  Renat Vafin ,  Andrei Jefremov ,  Sören Vang Andersen ,  Pontus Carlsson

发明人： David Zhao ,  Mattias Nilsson ,  Renat Vafin ,  Andrei Jefremov ,  Sören Vang Andersen ,  Pontus Carlsson

IPC分类号： H04N7/12 ,  H04N19/58 ,  H04N19/176 ,  H04N19/147 ,  H04N19/107 ,  H04N19/166 ,  H04N19/19 ,  H04N19/89 ,  H04B15/00 ,  H04L12/26

CPC分类号： H04N19/58 ,  H04N19/107 ,  H04N19/147 ,  H04N19/166 ,  H04N19/176 ,  H04N19/19 ,  H04N19/89

摘要： A method of performing a rate-distortion optimization process comprising, for each of a plurality of target image portions to be encoded in each of a plurality of frames, selecting a preferred one of a set of encoding modes by optimizing a function comprising an estimate of distortion for the target image portion and a measure of bit rate required to encode the target image portion, wherein the estimate of distortion is based on source coding distortion and an estimate of a distortion that would be experienced due to possible loss over the channel; encoding the target image portion into the encoded video stream using the selected encoding mode; and transmitting the encoded video stream over the channel. The rate-distortion optimization process for a current one of the frames is performed in dependence on feedback received from the receiving terminal based on an earlier one of the frames.

摘要翻译： 一种执行速率失真优化处理的方法，包括对于要在多个帧中的每一帧中编码的多个目标图像部分中的每一个，通过优化包括估计的估计的函数来选择一组编码模式中的优选的一个 用于目标图像部分的失真和对目标图像部分进行编码所需的比特率的度量，其中失真估计基于源编码失真和由于信道上可能的损失而将经历的失真的估计; 使用所选择的编码模式将目标图像部分编码成编码视频流; 以及通过所述信道发送所述经编码的视频流。 根据基于较早的帧之一从接收终端接收到的反馈来执行当前帧之一的速率失真优化处理。

公开(公告)号：US08484019B2

公开(公告)日：2013-07-09

申请号：US12811421

申请日：2008-12-30

申请人： Per Hedelin ,  Pontus Carlsson ,  Jonas Samuelsson ,  Michael Schug

发明人： Per Hedelin ,  Pontus Carlsson ,  Jonas Samuelsson ,  Michael Schug

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.

公开(公告)号：US20130093906A1

公开(公告)日：2013-04-18

申请号：US13339879

申请日：2011-12-29

申请人： Pontus Carlsson ,  Andrei Jefremov ,  Sergey Sablin ,  David Zhao

发明人： Pontus Carlsson ,  Andrei Jefremov ,  Sergey Sablin ,  David Zhao

IPC分类号： H04N5/228

CPC分类号： H04N5/23248 ,  H04N5/23258 ,  H04N5/23267

摘要： Method, device and computer program product for stabilizing a received video signal. A plurality of frames of the video signal is captured using a camera. The video signal is transmitted as an encoded bit stream. Displacement of the camera between successive frames is determined from a motion indication in the bit stream. The determined displacement is used to compensate for motion in the video signal between successive frames caused by the motion of the camera, to thereby stabilize the video signal.

摘要翻译： 用于稳定接收到的视频信号的方法，设备和计算机程序产品。 使用照相机拍摄视频信号的多个帧。 视频信号作为编码比特流发送。 摄像机在连续帧之间的位移由比特流中的运动指示确定。 确定的位移用于补偿由相机的运动引起的连续帧之间的视频信号中的运动，从而稳定视频信号。

公开(公告)号：US20130030817A1

公开(公告)日：2013-01-31

申请号：US13638901

申请日：2011-04-06

申请人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

发明人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

IPC分类号： G10L21/00

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 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。

公开(公告)号：US09762799B2

公开(公告)日：2017-09-12

申请号：US13339879

申请日：2011-12-29

申请人： Pontus Carlsson ,  Andrei Jefremov ,  Sergey Sablin ,  David Zhao

发明人： Pontus Carlsson ,  Andrei Jefremov ,  Sergey Sablin ,  David Zhao

IPC分类号： H04N5/232

CPC分类号： H04N5/23248 ,  H04N5/23258 ,  H04N5/23267

摘要： Method, device and computer program product for stabilizing a received video signal. A plurality of frames of the video signal is captured using a camera. The video signal is transmitted as an encoded bit stream. Displacement of the camera between successive frames is determined from a motion indication in the bit stream. The determined displacement is used to compensate for motion in the video signal between successive frames caused by the motion of the camera, to thereby stabilize the video signal.

公开(公告)号：US09378745B2

公开(公告)日：2016-06-28

申请号：US13638901

申请日：2011-04-06

申请人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

发明人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

IPC分类号： G10L19/06 ,  H04S3/00 ,  G10L19/008

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。

公开(公告)号：US09159326B2

公开(公告)日：2015-10-13

申请号：US13638900

申请日：2011-04-06

申请人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

发明人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

IPC分类号： H04R5/00 ,  G10L19/008

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。