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公开(公告)号：US20130128950A1
公开(公告)日：2013-05-23
申请号：US13303748
申请日：2011-11-23
IPC分类号： H04N7/26
摘要： A method and system for bit rate control during encoding of multimedia data are disclosed. A change in complexity of a multimedia picture relative to complexity associated with one or more multimedia pictures in a multimedia sequence is determined. A complexity associated with a multimedia picture is determined based on number of bits and an average quantization associated with the multimedia picture. A bit rate is adjusted for encoding the multimedia picture based on the change in complexity of the multimedia picture. The bit rate is increased on determining an increase in complexity of the multimedia picture and is decreased on determining a decrease in complexity of the multimedia picture. Utilization of additional bits during the increase in the bit rate and saving of bits during the decrease in the bit rate are compensated during adjusting of bit rates for encoding subsequent multimedia pictures in the multimedia sequence.
摘要翻译： 公开了一种用于多媒体数据编码期间比特率控制的方法和系统。 确定多媒体图像相对于与多媒体序列中的一个或多个多媒体图像相关的复杂度的复杂度的变化。 基于与多媒体图像相关联的比特数和平均量化来确定与多媒体图像相关联的复杂度。 基于多媒体图像的复杂度的变化，调整比特率以对多媒体图像进行编码。 在确定多媒体图像的复杂度的增加时，比特率增加，并且在确定多媒体图片的复杂度的降低时减少。 在调整用于对多媒体序列中的后续多媒体图像进行编码的比特率时，补偿比特率降低期间比特率增加和比特率保存期间附加比特的利用。
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公开(公告)号：US10728545B2
公开(公告)日：2020-07-28
申请号：US13303748
申请日：2011-11-23
IPC分类号： H04N19/115 , H04N19/149 , H04N19/172
摘要： A method and system for bit rate control during encoding of multimedia data are disclosed. A change in complexity of a multimedia picture relative to complexity associated with one or more multimedia pictures in a multimedia sequence is determined. A complexity associated with a multimedia picture is determined based on number of bits and an average quantization associated with the multimedia picture. A bit rate is adjusted for encoding the multimedia picture based on the change in complexity of the multimedia picture. The bit rate is increased on determining an increase in complexity of the multimedia picture and is decreased on determining a decrease in complexity of the multimedia picture. Utilization of additional bits during the increase in the bit rate and saving of bits during the decrease in the bit rate are compensated during adjusting of bit rates for encoding subsequent multimedia pictures in the multimedia sequence.
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公开(公告)号：US20110110422A1
公开(公告)日：2011-05-12
申请号：US12938397
申请日：2010-11-03
CPC分类号： H04N19/184 , H04N19/124 , H04N19/146 , H04N19/149 , H04N19/15 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/196 , H04N19/198 , H04N19/70
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。
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公开(公告)号：US09473792B2
公开(公告)日：2016-10-18
申请号：US12940046
申请日：2010-11-05
IPC分类号： H04N19/513 , H04N19/61 , H04N19/14 , H04N19/137 , H04N19/85 , H04N19/46
CPC分类号： H04N19/14 , H04N19/124 , H04N19/137 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/513 , H04N19/61 , H04N19/85
摘要： Method and system to improve the performance of a video encoder. The method includes processing an initial video signal in a front-end image pre-processor to obtain a processed video signal and processor information respecting the signal, providing the processed video signal and the processor information to a video encoder, and encoding the video signal in the video encoder according to the processor information to provide an encoded video signal for storage. The system includes a video pre-processor connectable to receive an initial video signal. The video encoder in communication with the video pre-processor receives a processed video signal and a processor information. A storage medium in communication with the video encoder stores an encoded video signal.
摘要翻译： 提高视频编码器性能的方法和系统。 该方法包括处理前端图像预处理器中的初始视频信号以获得处理后的视频信号和与该信号相关的处理器信息，将经处理的视频信号和处理器信息提供给视频编码器，并对视频信号进行编码 视频编码器根据处理器信息提供编码视频信号进行存储。 该系统包括可连接以接收初始视频信号的视频预处理器。 与视频预处理器通信的视频编码器接收经处理的视频信号和处理器信息。 与视频编码器通信的存储介质存储经编码的视频信号。
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5.发明授权Limiting the maximum size of an encoded video picture using sub-picture based rate control 有权使用基于子图像的速率控制来限制编码视频图像的最大尺寸公开(公告)号：US08780973B2
公开(公告)日：2014-07-15
申请号：US13206718
申请日：2011-08-10
CPC分类号： H04N19/00096 , H04N19/115 , H04N19/126 , H04N19/15 , H04N19/176
摘要： A method for encoding a picture in a video sequence is provided that includes determining the current encoded size of the picture after coding a plurality of macroblocks in the picture, determining that encoding remaining macroblocks in the picture may cause the encoded size of the picture to exceed a maximum encoded picture size, computing a quantization scale responsive to the determining, wherein the quantization scale is computed such that the estimated encoded size of the remaining macroblocks if the remaining macroblocks are quantized with the quantization scale does not exceed the difference between the maximum encoded picture size and the current encoded picture size, and quantizing at least one of the remaining macroblocks with the new quantization scale.
摘要翻译： 提供了一种用于对视频序列中的图像进行编码的方法，包括：在编码图像中的多个宏块之后确定图像的当前编码大小，确定图像中的剩余宏块编码可能导致图像的编码大小超过 最大编码图像大小，响应于该确定来计算量化尺度，其中计算量化比例，使得如果剩余宏块用量化比例量化的剩余宏块的估计编码大小不超过最大编码图像大小之间的差 图像尺寸和当前编码图像尺寸，并用新的量化尺度量化剩余宏块中的至少一个。
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公开(公告)号：US20110235706A1
公开(公告)日：2011-09-29
申请号：US13053419
申请日：2011-03-22
IPC分类号： H04N7/26
CPC分类号： H04N19/126 , H04N19/14 , H04N19/17
摘要： A method of encoding an image frame in a video encoding system. The image frame has a region of interest (ROI) and a non region of interest (non-ROI). In the method, quantization scale for the image frame based on rate control information is determined. ROI statistics based on residual energy of the ROI and non-ROI is then calculated. Quantization scale for the image frame based on ROI priorities and ROI statistics is calculated. Further, quantization scales for ROI and non-ROI based on ROI priorities are determined.
摘要翻译： 一种对视频编码系统中的图像帧进行编码的方法。 图像帧具有感兴趣区域（ROI）和非感兴趣区域（非ROI）。 在该方法中，确定基于速率控制信息的图像帧的量化尺度。 然后计算基于ROI和非ROI的剩余能量的ROI统计。 计算基于ROI优先级和ROI统计量的图像帧的量化标度。 此外，确定基于ROI优先级的用于ROI和非ROI的量化尺度。
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7.发明申请Limiting the Maximum Size of an Encoded Video Picture Using Sub-Picture Based Rate Control 有权使用基于子画面的速率控制来限制编码视频图像的最大尺寸公开(公告)号：US20120039386A1
公开(公告)日：2012-02-16
申请号：US13206718
申请日：2011-08-10
IPC分类号： H04N7/26
CPC分类号： H04N19/00096 , H04N19/115 , H04N19/126 , H04N19/15 , H04N19/176
摘要： A method for encoding a picture in a video sequence is provided that includes determining the current encoded size of the picture after coding a plurality of macroblocks in the picture, determining that encoding remaining macroblocks in the picture may cause the encoded size of the picture to exceed a maximum encoded picture size, computing a quantization scale responsive to the determining, wherein the quantization scale is computed such that the estimated encoded size of the remaining macroblocks if the remaining macroblocks are quantized with the quantization scale does not exceed the difference between the maximum encoded picture size and the current encoded picture size, and quantizing at least one of the remaining macroblocks with the new quantization scale.
摘要翻译： 提供了一种用于对视频序列中的图像进行编码的方法，包括：在编码图像中的多个宏块之后确定图像的当前编码大小，确定图像中的剩余宏块编码可能导致图像的编码大小超过 最大编码图像大小，响应于该确定来计算量化尺度，其中计算量化比例，使得如果剩余宏块用量化比例量化的剩余宏块的估计编码大小不超过最大编码图像大小之间的差 图像尺寸和当前编码图像尺寸，并用新的量化尺度量化剩余宏块中的至少一个。
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公开(公告)号：US09077996B2
公开(公告)日：2015-07-07
申请号：US13588245
申请日：2012-08-17
IPC分类号： H04N7/32 , H04N19/433
CPC分类号： H04N19/433 , H04N19/43
摘要： A video encoder includes an entropy encoder that computes a predicted motion vector (PMV) for each of a plurality of macroblocks in a video frame based on motion vectors of multiple other macroblocks. The video encoder also includes a motion estimator that determines a predicted motion vector for a given macroblock by reusing, as the predicted motion vector for the given macroblock, only the PMV computed by the entropy encoder for a macroblock immediately on top of the given macroblock.
摘要翻译： 视频编码器包括熵编码器，其基于多个其他宏块的运动矢量来计算视频帧中的多个宏块中的每一个的预测运动矢量（PMV）。 视频编码器还包括运动估计器，该运动估计器通过重新使用给定宏块的预测的运动矢量，仅对由给定宏块顶部的宏块计算的由熵编码器计算出的PMV来确定给定宏块的预测运动矢量。
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公开(公告)号：US20080031365A1
公开(公告)日：2008-02-07
申请号：US11583537
申请日：2006-10-18
IPC分类号： H04B14/04
摘要： In an apparatus and method, time-varying signals are processed and encoded via a frequency domain linear prediction (FDLP) scheme to arrive at an all-pole model. Residual signals resulted from the scheme are estimated. Quantized values of the all-pole model and the residual signals are packetized as encoded signals suitable for transmission or storage. To reconstruct the time-varying signals, the encoded signals are decoded. The decoding process is basically the reverse of the encoding process.
摘要翻译： 在一种装置和方法中，通过频域线性预测（FDLP）方案处理和编码时变信号以得到全极模型。 估计该方案产生的剩余信号。 全极模型和残余信号的量化值被分组为适合于传输或存储的编码信号。 为了重构时变信号，对编码信号进行解码。 解码过程基本上与编码过程相反。
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公开(公告)号：US09300975B2
公开(公告)日：2016-03-29
申请号：US13490549
申请日：2012-06-07
IPC分类号： H04N7/32 , H04N19/433 , H04N19/43
CPC分类号： H04N19/433 , H04N19/43
摘要： A video encoder includes a buffer, a DMA engine, a motion estimator and a motion compensator. The buffer includes four pages where macroblocks are stored. The motion estimator generates a motion vector for a given macroblock. The motion compensator applies the motion vectors generated by the motion estimator to a previously encoded frame. Each of the four pages is concurrently accessed by one of the motion estimator, the motion compensator, and a channel of the DMA engine. Simultaneously the motion compensator accesses one page of the buffer containing a first set of macroblocks, the motion estimator accesses a second page of the buffer containing a second set of macroblocks, a first DMA engine channel writes a different set of macroblocks to a third page of the buffer and a second DMA engine channel writes another set of macroblocks to a fourth page of the buffer.
摘要翻译： 视频编码器包括缓冲器，DMA引擎，运动估计器和运动补偿器。 缓冲器包括存储宏块的四页。 运动估计器产生给定宏块的运动矢量。 运动补偿器将由运动估计器生成的运动矢量应用于先前编码的帧。 四个页面中的每一个由运动估计器，运动补偿器和DMA引擎的通道之一同时访问。 同时，运动补偿器访问包含第一组宏块的缓冲器的一页，运动估计器访问包含第二组宏块的缓冲器的第二页，第一DMA引擎通道将不同的宏块集合写入第三页的第三页 缓冲器和第二DMA引擎通道将另一组宏块写入缓冲器的第四页。
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