Method for coefficient bitdepth limitation, encoder and bitstream generation apparatus
    71.
    发明授权
    Method for coefficient bitdepth limitation, encoder and bitstream generation apparatus 有权
    系数位差限制方法,编码器和比特流生成装置

    公开(公告)号:US07949044B2

    公开(公告)日:2011-05-24

    申请号:US11104070

    申请日:2005-04-12

    IPC分类号: H04N11/04 G06K9/36

    摘要: A method for coefficient bitdepth limitation in an encoder and/or bitstream generation apparatus including the steps of (A) generating one or more residual block coefficients in response to a video signal and one or more coding parameters and (B) manipulating the one or more coding parameters such that the one or more residual block coefficients are prevented from having values greater than a bitdepth of the video signal plus a predefined number of bits.

    摘要翻译: 一种编码器和/或比特流生成装置中的系数位差限制的方法,包括以下步骤:(A)响应于视频信号和一个或多个编码参数产生一个或多个残余块系数,以及(B)操纵所述一个或多个 编码参数使得一个或多个残余块系数被阻止具有大于视频信号的位差加上预定位数的位的值。

    Method and apparatus for image decoder post-processing using image pre-processing and image encoding information
    72.
    发明授权
    Method and apparatus for image decoder post-processing using image pre-processing and image encoding information 有权
    用于使用图像预处理和图像编码信息的图像解码器后处理的方法和装置

    公开(公告)号:US07684626B1

    公开(公告)日:2010-03-23

    申请号:US11292199

    申请日:2005-12-01

    摘要: A method for image decoding is disclosed. The method generally includes the steps of (A) receiving from a medium (1) an encoded signal and (2) transform data comprising at least one of (i) encoding statistics embedded in the encoded signal, (ii) encoding information and (iii) pre-processing information, wherein (a) the encoding statistics are created by an encoder in encoding an intermediate input signal to create the encoded signal, (b) the encoding information is producible by the encoder in the encoding and (c) the pre-processing information is producible by a pre-processor in converting an image input signal into the intermediate input signal, (B) generating an intermediate output signal by decoding the encoded signal and (C) generating an image output signal by processing the intermediate output signal in response to the transform data.

    摘要翻译: 公开了一种用于图像解码的方法。 该方法通常包括以下步骤:(A)从介质(1)接收编码信号;(2)转换数据,其包括以下至少一个:(i)编码嵌入在编码信号中的统计信息,(ii)编码信息和(iii 其中(a)由编码器在对中间输入信号进行编码以产生编码信号时产生编码统计量,(b)编码信息由编码器在编码中产生,(c)预编码信息 处理信息可由预处理器将图像输入信号转换成中间输入信号,(B)通过解码编码信号产生中间输出信号,(C)通过处理中间输出信号产生图像输出信号 响应于变换数据。

    PROGRAMMABLE QUANTIZATION DEAD ZONE AND THRESHOLD FOR STANDARD-BASED H.264 AND/OR VC1 VIDEO ENCODING
    73.
    发明申请
    PROGRAMMABLE QUANTIZATION DEAD ZONE AND THRESHOLD FOR STANDARD-BASED H.264 AND/OR VC1 VIDEO ENCODING 审中-公开
    可编程定量死区和基于标准的H.264和/或VC1视频编码的阈值

    公开(公告)号:US20100061449A1

    公开(公告)日:2010-03-11

    申请号:US12568878

    申请日:2009-09-29

    IPC分类号: H04N7/26

    摘要: A video encoder including an encoder circuit, a quantizer circuit and a control circuit. The encoder circuit may be configured to generate a plurality of coefficient values and motion vectors in response to a video stream, a first control signal, a second control signal, and a number of quantized values. The control circuit may be configured to (i) generate the first control signal, the second control signal, and a quantizer index signal and (ii) set two or more quantization dead zones and two or more offsets to different values, where the quantization dead zones and the offsets are independently programmable. The quantizer circuit may be configured to generate the number of quantized values in response to the coefficient values, the quantizer index signal, the two or more quantization dead zones and the two or more offsets. A first coefficient value may be quantized using a first quantization dead zone and a first offset. A second coefficient value may be quantized using a second quantization dead zone and a second offset. The first and second quantization dead zones generally have different values. The first and second offsets generally have different values. Quantization calculations determining each quantized value take into account respective quantization dead zones and offsets.

    摘要翻译: 一种视频编码器,包括编码器电路,量化器电路和控制电路。 编码器电路可以被配置为响应于视频流,第一控制信号,第二控制信号和多个量化值而产生多个系数值和运动矢量。 控制电路可以被配置为:(i)产生第一控制信号,第二控制信号和量化器索引信号,以及(ii)将两个或多个量化死区和两个或更多个偏移设置为不同的值,其中量化死区 区域和偏移量是独立可编程的。 量化器电路可以被配置为响应于系数值,量化器索引信号,两个或更多个量化死区和两个或更多个偏移量来生成量化值的数量。 可以使用第一量化死区和第一偏移来量化第一系数值。 可以使用第二量化死区和第二偏移来量化第二系数值。 第一和第二量化死区通常具有不同的值。 第一和第二偏移量通常具有不同的值。 确定每个量化值的量化计算考虑了相应的量化死区和偏移量。

    METHOD AND APPARATUS FOR VIDEO DEINTERLACING AND FORMAT CONVERSION
    74.
    发明申请
    METHOD AND APPARATUS FOR VIDEO DEINTERLACING AND FORMAT CONVERSION 有权
    用于视频去除和格式转换的方法和装置

    公开(公告)号:US20080122975A1

    公开(公告)日:2008-05-29

    申请号:US12025233

    申请日:2008-02-04

    IPC分类号: H04N7/01

    CPC分类号: H04N7/012

    摘要: A method for deinterlacing a picture is disclosed. The method generally includes the steps of (A) calculating a potential sample at a location interfaced with a first field of the picture by temporal filtering, (B) evaluating a protection condition in a current region around the location after inclusion of the potential sample and (C) calculating an interpolated sample at the location by vertical spatial filtering the first field in response to the protection condition indicating a significant increase in a vertical activity within the current region due to the potential sample.

    摘要翻译: 公开了一种用于去隔行扫描图像的方法。 该方法通常包括以下步骤:(A)通过时间滤波在与图像的第一场接口的位置处计算潜在样本;(B)评估在包含潜在样本之后的位置周围的当前区域中的保护条件;以及 (C)响应于指示由于潜在样本导致的当前区域内的垂直活动的显着增加的保护条件,通过对第一场进行垂直空间滤波来计算位置处的插值样本。

    Method and/or apparatus for reducing the complexity of H.264 B-frame encoding using selective reconstruction
    75.
    发明申请
    Method and/or apparatus for reducing the complexity of H.264 B-frame encoding using selective reconstruction 有权
    用于使用选择性重建降低H.264 B帧编码的复杂度的方法和/或装置

    公开(公告)号:US20070263724A1

    公开(公告)日:2007-11-15

    申请号:US11879944

    申请日:2007-07-19

    IPC分类号: H04N11/04

    摘要: A method for implementing B-frame prediction in video compression comprising the steps of (A) setting a prediction flag (i) “off” if B-frames are used for block prediction and (ii) “on” if B-frames are not used for block prediction, (B) if the prediction flag is off, generating an output video signal in response to an input video signal by performing an inverse quantization step and an inverse transform step in accordance with a predefined coding specification and (C) if the prediction flag is on, bypassing the inverse quantization step and the inverse transform step.

    摘要翻译: 一种在视频压缩中实现B帧预测的方法,包括以下步骤:(A)如果B帧用于块预测,则设置预测标志(i)“关闭”,以及(ii)如果B帧不是“ (B)如果预测标志关闭,则通过根据预定义的编码规范执行逆量化步骤和逆变换步骤,响应于输入视频信号产生输出视频信号,(C)如果 该预测标志位于旁路逆量化步骤和逆变换步骤。

    Rate control method for video transcoding
    76.
    发明授权
    Rate control method for video transcoding 有权
    视频转码速率控制方法

    公开(公告)号:US07170938B1

    公开(公告)日:2007-01-30

    申请号:US09934975

    申请日:2001-08-21

    IPC分类号: H04N7/12

    摘要: The present invention discloses a system and method for rate control of MPEG video streams to achieve a target bit rate in a transcoder at the best visual quality possible. The invention monitors video buffer fullness for selecting the amount of rate reduction necessary to achieve a target bit rate. The invention also utilizes a method for selective requantization of DCT coefficients to assure visual quality.

    摘要翻译: 本发明公开了一种用于MPEG视频流的速率控制的系统和方法,以在可能的最佳视觉质量下实现代码转换器中的目标比特率。 本发明监视视频缓冲器充满度以选择实现目标比特率所需的速率降低量。 本发明还利用DCT系数的选择性重新排序以确保视觉质量的方法。

    Systems and methods for an imaging system using multiple image sensors
    77.
    发明授权
    Systems and methods for an imaging system using multiple image sensors 有权
    使用多个图像传感器的成像系统的系统和方法

    公开(公告)号:US08619128B2

    公开(公告)日:2013-12-31

    申请号:US12570966

    申请日:2009-09-30

    IPC分类号: H04N13/02

    摘要: Systems and methods may employ separate image sensors for collecting different types of data. In one embodiment, separate luma, chroma and 3-D image sensors may be used. The systems and methods may involve generating an alignment transform for the image sensors, and using the 3-D data from the 3-D image sensor to process disparity compensation. The systems and methods may involve image sensing, capture, processing, rendering and/or generating images. For example, one embodiment may provide an imaging system, including: a first image sensor configured to obtain luminance data of a scene; a second image sensor configured to obtain chrominance data of the scene; a third image sensor configured to obtain three-dimensional data of the scene; and an image processor configured to receive the luminance, chrominance and three-dimensional data and to generate a composite image corresponding to the scene from that data.

    摘要翻译: 系统和方法可以采用单独的图像传感器来收集不同类型的数据。 在一个实施例中,可以使用分开的亮度,色度和3-D图像传感器。 系统和方法可以涉及为图像传感器生成对准变换,并且使用来自3-D图像传感器的3-D数据来处理视差补偿。 系统和方法可以涉及图像感测,捕获,处理,渲染和/或生成图像。 例如,一个实施例可以提供一种成像系统,包括:第一图像传感器,被配置为获得场景的亮度数据; 第二图像传感器,被配置为获得场景的色度数据; 第三图像传感器,被配置为获得场景的三维数据; 以及被配置为接收亮度,色度和三维数据并且从该数据生成与场景相对应的合成图像的图像处理器。

    Temporal filtering techniques for image signal processing
    78.
    发明授权
    Temporal filtering techniques for image signal processing 有权
    用于图像信号处理的时间滤波技术

    公开(公告)号:US08593483B2

    公开(公告)日:2013-11-26

    申请号:US12789821

    申请日:2010-05-28

    IPC分类号: G09G5/00

    摘要: Temporally filtering raw image data may include a temporal filter that determines a spatial location of a current pixel and identifies at least one collocated reference pixel from a previous frame. A motion delta value is determined based upon the current pixel and its collocated reference pixel. An index is determined based upon the motion delta value and a motion history value corresponding to the current pixel from the previous frame. Using the index, a first filtering coefficient may be selected from a motion table. Then an attenuation factor may be selected from a luma table based upon the value of the current pixel, and a second filtering coefficient may be determined based upon the selected attenuation factor and the first filtering coefficient. The temporally filtered output value corresponding to the current pixel may then be based upon the second filtering coefficient, the current pixel, and the collocated reference pixel.

    摘要翻译: 时间过滤原始图像数据可以包括时间滤波器,其确定当前像素的空间位置并且识别来自先前帧的至少一个并置参考像素。 基于当前像素及其并置参考像素来确定运动增益值。 基于来自前一帧的当前像素的运动增量值和运动历史值来确定索引。 使用该索引,可以从运动表中选择第一过滤系数。 然后可以基于当前像素的值从亮度表中选择衰减因子,并且可以基于所选择的衰减因子和第一滤波系数来确定第二滤波系数。 对应于当前像素的时间滤波的输出值然后可以基于第二滤波系数,当前像素和并置参考像素。

    Automatic tone mapping for cameras
    79.
    发明授权
    Automatic tone mapping for cameras 有权
    相机自动色调映射

    公开(公告)号:US08358351B2

    公开(公告)日:2013-01-22

    申请号:US12479629

    申请日:2009-06-05

    IPC分类号: H04N5/228 H04N5/202

    CPC分类号: H04N5/202

    摘要: A device, method, computer useable medium, and processor programmed to automatically generate tone mapping curves in a digital camera based on image metadata are described. By examining image metadata from a digital camera's sensor, such as the light-product, one can detect sun-lit, high-light, and low-light scenes. Once the light-product value has been calculated for a given image, a tone mapping curve can automatically be generated within the sensor and adjusted appropriately for the scene based on predetermined parameters. Further, it has been determined that independently varying the slopes of the tone mapping curve at the low end (S0) and high end (S1) of the curve results in more visually appealing images. By dynamically and independently selecting S0 and S1 values based on image metadata, more visually pleasing images can be generated.

    摘要翻译: 描述了基于图像元数据在数字照相机中自动生成色调映射曲线的设备,方法,计算机可用介质和处理器。 通过从数码相机的传感器(如光产品)中检查图像元数据,可以检测到日光,高光和低光的场景。 一旦为给定图像计算了光产品值,就可以在传感器内自动生成色调映射曲线,并根据预定参数对场景进行适当调整。 此外,已经确定,在曲线的低端(S0)和高端(S1)处独立地改变色调映射曲线的斜率导致更加视觉吸引人的图像。 通过基于图像元数据动态地且独立地选择S0和S1值,可以产生更令人满意的图像。

    Method and apparatus for modeling quantization matrices for image/video encoding
    80.
    发明授权
    Method and apparatus for modeling quantization matrices for image/video encoding 有权
    用于建模图像/视频编码的量化矩阵的方法和装置

    公开(公告)号:US08326068B1

    公开(公告)日:2012-12-04

    申请号:US11512736

    申请日:2006-08-30

    申请人: Huipin Zhang Guy Cote

    发明人: Huipin Zhang Guy Cote

    IPC分类号: G06K9/00

    摘要: A method for encoding an image is disclosed. The method generally includes the steps, of (A) generating a quantization matrix as a function of at least four parameters, (B) optimizing the parameters to maximize a quality metric for encoding the image and (C) encoding the image with the quantization matrix as optimized.

    摘要翻译: 公开了一种图像编码方法。 该方法通常包括以下步骤:(A)生成作为至少四个参数的函数的量化矩阵,(B)优化参数以最大化用于编码图像的质量度量;(C)使用量化矩阵对图像进行编码 优化。