Reducing flicker in the display of video streams
    1.
    发明授权
    Reducing flicker in the display of video streams 有权
    降低视频流显示中的闪烁

    公开(公告)号:US08582645B2

    公开(公告)日:2013-11-12

    申请号:US12794942

    申请日:2010-06-07

    IPC分类号: H04N5/00

    摘要: Image frames of a video stream are encoded with the aim of reducing flicker in the video stream when displayed. In one embodiment, the quantization parameter used to quantize an image frame is capped to be not greater than a quantization parameter used to quantize an immediately previous image frame. In another embodiment, the quantization step size used to quantize a macro-block of an image frame is computed based on the value of a quantization error of a co-located macro-block in an immediately previous image frame. In yet another embodiment, macro-block transform coefficients corresponding to high-frequency components are quantized using relatively higher quantization parameter values if the image frame is deemed to contain high activity. In yet another embodiment, flicker-prone macro-blocks of a source frame are replaced by corresponding best-match macro-blocks of a previous reconstructed frame, prior to being encoded.

    摘要翻译: 视频流的图像帧被编码,目的是在显示时减少视频流中的闪烁。 在一个实施例中,用于量化图像帧的量化参数被限制为不大于用于量化紧接在前的图像帧的量化参数。 在另一个实施例中,用于量化图像帧的宏块的量化步长基于紧邻的前一图像帧中的同位置宏块的量化误差的值来计算。 在另一个实施例中,如果图像帧被认为包含高活动性,则使用相对较高的量化参数值来量化对应于高频分量的宏块变换系数。 在另一个实施例中,在被编码之前,源帧的闪烁容易的宏块被先前重建帧的对应的最佳匹配宏块替代。

    REDUCING FLICKER IN THE DISPLAY OF VIDEO STREAMS
    2.
    发明申请
    REDUCING FLICKER IN THE DISPLAY OF VIDEO STREAMS 有权
    在视频流的显示中减少闪光

    公开(公告)号:US20100315557A1

    公开(公告)日:2010-12-16

    申请号:US12794942

    申请日:2010-06-07

    IPC分类号: H04N5/00

    摘要: Image frames of a video stream are encoded with the aim of reducing flicker in the video stream when displayed. In one embodiment, the quantization parameter used to quantize an image frame is capped to be not greater than a quantization parameter used to quantize an immediately previous image frame. In another embodiment, the quantization step size used to quantize a macro-block of an image frame is computed based on the value of a quantization error of a co-located macro-block in an immediately previous image frame. In yet another embodiment, macro-block transform coefficients corresponding to high-frequency components are quantized using relatively higher quantization parameter values if the image frame is deemed to contain high activity. In yet another embodiment, flicker-prone macro-blocks of a source frame are replaced by corresponding best-match macro-blocks of a previous reconstructed frame, prior to being encoded.

    摘要翻译: 视频流的图像帧被编码,目的是在显示时减少视频流中的闪烁。 在一个实施例中,用于量化图像帧的量化参数被限制为不大于用于量化紧接在前的图像帧的量化参数。 在另一个实施例中,用于量化图像帧的宏块的量化步长基于紧邻的前一图像帧中的同位置宏块的量化误差的值来计算。 在另一个实施例中,如果图像帧被认为包含高活动性,则使用相对较高的量化参数值来量化对应于高频分量的宏块变换系数。 在另一个实施例中,在被编码之前,源帧的闪烁容易的宏块被先前重建帧的对应的最佳匹配宏块替代。

    Linear temporal reference scheme having non-reference predictive frames
    3.
    发明授权
    Linear temporal reference scheme having non-reference predictive frames 有权
    具有非参考预测帧的线性时间参考方案

    公开(公告)号:US08170356B2

    公开(公告)日:2012-05-01

    申请号:US12060887

    申请日:2008-04-02

    IPC分类号: G06K9/36

    摘要: The method, system, and apparatus of linear temporal reference scheme having non-reference predictive frames is disclosed. In one embodiment, a method of a temporal reference scheme includes creating a non-reference predictive frame and a reference predictive frame from a reference frame, increasing a quantization factor of the non-reference predictive frame by a threshold value, and decreasing the quantization factor of the reference predictive frame by the threshold value. The method may include toggling between the temporal reference scheme and another temporal reference scheme in which there may be no non-reference predictive frames and only reference predictive frames based on a scenario. The method may also include calculating a target bit rate across a communication channel through a bit rate calculation algorithm that considers a bandwidth capacity across the communication channel.

    摘要翻译: 公开了具有非参考预测帧的线性时间参考方案的方法,系统和装置。 在一个实施例中,时间参考方案的方法包括从参考帧创建非参考预测帧和参考预测帧,将非参考预测帧的量化因子增加阈值,并且减小量化因子 的参考预测帧的阈值。 该方法可以包括在时间参考方案和另一个时间参考方案之间切换,其中可以不存在基于场景的非参考预测帧和仅参考预测帧。 该方法还可以包括通过考虑跨通信信道的带宽容量的比特率计算算法来计算跨通信信道的目标比特率。

    Preserving text quality in video encoding
    4.
    发明授权
    Preserving text quality in video encoding 有权
    在视频编码中保持文本质量

    公开(公告)号:US09152875B2

    公开(公告)日:2015-10-06

    申请号:US12777433

    申请日:2010-05-11

    摘要: A video encoder receives a macro-block of an image frame, and determines whether the macro-block contains text. The video encoder computes a quantization parameter for quantizing the macro-block, with the quantization parameter computed to be smaller if the macro-block is determined to contain text. The video encoder encodes the macro-block using the quantization parameter. Text quality in the encoded macro-block is preserved.

    摘要翻译: 视频编码器接收图像帧的宏块,并且确定宏块是否包含文本。 视频编码器计算用于量化宏块的量化参数,如果宏块被确定为包含文本,则计算的量化参数更小。 视频编码器使用量化参数对宏块进行编码。 编码宏块中的文本质量得以保留。

    Intra/Inter Mode Decision for Predictive Frame Encoding
    5.
    发明申请
    Intra/Inter Mode Decision for Predictive Frame Encoding 有权
    用于预测帧编码的帧内/帧间模式决定

    公开(公告)号:US20130202036A1

    公开(公告)日:2013-08-08

    申请号:US12751211

    申请日:2010-03-31

    IPC分类号: H04N7/26

    摘要: This invention predicts that intra mode prediction is more effective for the macroblocks where motion estimation in inter mode prediction fails. This failure is indicated by a large value of the inter mode SAD. This invention performs intra mode prediction for only macro blocks have larger inter mode SADs. The definition of a large inter mode SAD differs for different content. This invention compares the inter mode SAD of a current macroblock with an adaptive threshold. This adaptive threshold depends on the average and variance of the SADs of the previous predicted frame. An adaptive threshold is calculated for each new predictive frame.

    摘要翻译: 本发明预测帧模式预测对于帧间模式预测中的运动估计失败的宏块更有效。 该故障由间隔模式SAD的大值指示。 本发明仅对具有较大的帧间模式SAD的宏块执行帧内模式预测。 大型inter模式SAD的定义因不同内容而异。 本发明将当前宏块的帧间模式SAD与自适应阈值进行比较。 该自适应阈值取决于先前预测帧的SAD的平均值和方差。 为每个新的预测帧计算自适应阈值。

    PRESERVING TEXT QUALITY IN VIDEO ENCODING
    6.
    发明申请
    PRESERVING TEXT QUALITY IN VIDEO ENCODING 有权
    保存视频编码中的文本质量

    公开(公告)号:US20100316119A1

    公开(公告)日:2010-12-16

    申请号:US12777433

    申请日:2010-05-11

    IPC分类号: H04N7/26

    摘要: A video encoder receives a macro-block of an image frame, and determines whether the macro-block contains text. The video encoder computes a quantization parameter for quantizing the macro-block, with the quantization parameter computed to be smaller if the macro-block is determined to contain text. The video encoder encodes the macro-block using the quantization parameter. Text quality in the encoded macro-block is preserved.

    摘要翻译: 视频编码器接收图像帧的宏块,并且确定宏块是否包含文本。 视频编码器计算用于量化宏块的量化参数,如果宏块被确定为包含文本,则计算的量化参数更小。 视频编码器使用量化参数对宏块进行编码。 编码宏块中的文本质量得以保留。

    Intra/inter mode decision for predictive frame encoding
    7.
    发明授权
    Intra/inter mode decision for predictive frame encoding 有权
    用于预测帧编码的帧内/帧间模式决定

    公开(公告)号:US09560350B2

    公开(公告)日:2017-01-31

    申请号:US12751211

    申请日:2010-03-31

    摘要: This invention predicts that intra mode prediction is more effective for the macro blocks where motion estimation in inter mode prediction fails. This failure is indicated by a large value of the inter mode SAD. This invention performs intra mode prediction for only macro blocks have larger inter mode SADs. The definition of a large inter mode SAD differs for different content. This invention compares the inter mode SAD of a current macroblock with an adaptive threshold. This adaptive threshold depends on the average and variance of the SADs of the previous predicted frame. An adaptive threshold is calculated for each new predictive frame.

    摘要翻译: 本发明预测帧模式预测对于帧间模式预测中的运动估计失败的宏块更有效。 该故障由间隔模式SAD的大值指示。 本发明仅对具有较大的帧间模式SAD的宏块执行帧内模式预测。 大型inter模式SAD的定义因不同内容而异。 本发明将当前宏块的帧间模式SAD与自适应阈值进行比较。 该自适应阈值取决于先前预测帧的SAD的平均值和方差。 为每个新的预测帧计算自适应阈值。

    Rate Control in Video Coding
    8.
    发明申请
    Rate Control in Video Coding 审中-公开
    视频编码中的速率控制

    公开(公告)号:US20110255594A1

    公开(公告)日:2011-10-20

    申请号:US13084572

    申请日:2011-04-12

    IPC分类号: H04N7/26

    摘要: A method of rate control in coding of a video sequence to generate a compressed bit stream is provided that includes computing a sequence base quantization step size for a sequence of pictures in the video sequence, computing a picture base quantization step size for a picture in the sequence of pictures based on the sequence base quantization step size, a type of the picture, and a level of the picture in a rate control hierarchy, and coding the picture using the picture base quantization step size to generate a portion of the compressed bit stream.

    摘要翻译: 提供了一种用于编码视频序列以产生压缩比特流的速率控制的方法,包括:计算视频序列中的一系列图像的序列基本量化步长,计算图像中的图像的图像基本量化步长 基于序列基本量化步长,图像类型和速率控制层级中的图像的级别的图像序列,以及使用图像基本量化步长对图像进行编码,以生成压缩比特流的一部分 。

    LINEAR TEMPORAL REFERENCE SCHEME HAVING NON-REFERENCE PREDICTIVE FRAMES
    9.
    发明申请
    LINEAR TEMPORAL REFERENCE SCHEME HAVING NON-REFERENCE PREDICTIVE FRAMES 有权
    具有非参考预测框架的线性时间参考方案

    公开(公告)号:US20090252426A1

    公开(公告)日:2009-10-08

    申请号:US12060887

    申请日:2008-04-02

    IPC分类号: G06K9/36

    摘要: The method, system, and apparatus of linear temporal reference scheme having non-reference predictive frames is disclosed. In one embodiment, a method of a temporal reference scheme includes creating a non-reference predictive frame and a reference predictive frame from a reference frame, increasing a quantization factor of the non- and reference predictive frame by a threshold value, and decreasing the quantization factor of the reference predictive frame by the threshold value. The method may include toggling between the temporal reference scheme and another temporal reference scheme in which there may be no non-reference predictive frames and only reference predictive frames based on a scenario. The method may also include calculating a target bit rate across a communication channel through a bit rate calculation algorithm that considers a bandwidth capacity across the communication channel.

    摘要翻译: 公开了具有非参考预测帧的线性时间参考方案的方法,系统和装置。 在一个实施例中,时间参考方案的方法包括从参考帧创建非参考预测帧和参考预测帧,将非参考预测帧的量化因子增加阈值,并减少量化 参考预测帧的因子乘以阈值。 该方法可以包括在时间参考方案和另一个时间参考方案之间切换,其中可以不存在基于场景的非参考预测帧和仅参考预测帧。 该方法还可以包括通过考虑跨通信信道的带宽容量的比特率计算算法来计算跨通信信道的目标比特率。

    TRANSMISSION BIT-RATE CONTROL IN A VIDEO ENCODER
    10.
    发明申请
    TRANSMISSION BIT-RATE CONTROL IN A VIDEO ENCODER 审中-公开
    视频编码器中的传输速率控制

    公开(公告)号:US20110110422A1

    公开(公告)日:2011-05-12

    申请号:US12938397

    申请日:2010-11-03

    IPC分类号: H04N7/26 H04N11/02

    摘要: A video encoder receives a minimum number of bits (MIN) and a maximum number of bits (MAX) to be used to encode a segment of a sequence of image frames, the segment including a set of pictures contained in the sequence of image frames. The video encoder encodes the set of pictures using a total number of bits greater than the minimum number of bits (MIN), and not exceeding the maximum number of bits (MAX). Thus, the transmission bit-rate of the video encoder can be constrained to lie within a maximum and minimum rate. In an embodiment, the constraints are enforced over relatively short time intervals.

    摘要翻译: 视频编码器接收要用于编码图像帧序列的最小位数(MIN)和最大位数(MAX),该片段包括包含在图像帧序列中的一组图像。 视频编码器使用大于最小位数(MIN)的总位数来编码图像组,并且不超过最大位数(MAX)。 因此,视频编码器的传输比特率可以被限制在最大和最小速率之内。 在一个实施例中,约束在相对短的时间间隔内被强制执行。