中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

147 records (took 0.16 seconds)

    Method and system for video encoding using a variable number of B frames
    4.
    发明申请
    Method and system for video encoding using a variable number of B frames 有权
    使用可变数量的B帧进行视频编码的方法和系统

    公开(公告)号：US20050147167A1

    公开(公告)日：2005-07-07

    申请号：US10743722

    申请日：2003-12-24

    Applicant: Adriana Dumitras ,  Barin Haskell

    Inventor： Adriana Dumitras ,  Barin Haskell

    IPC: H04N7/26 ,  H04N7/50 ,  H04N7/12

    CPC classification number: H04N19/87 ,  H04N19/109 ,  H04N19/114 ,  H04N19/139 ,  H04N19/142 ,  H04N19/172

    Abstract: An effective method for dynamically selecting the number of I, P and B frames during video coding is proposed. Short-term look-ahead analysis of a video sequence yields a variable number of B frames to be coded between any two stored pictures. The first picture of a group of frames (GOF) may be coded as a B picture. Motion speed is calculated for each picture of the GOF with respect to the first picture of the GOF. Subject to exceptions, as long as the subsequent pictures exhibit motion speeds that are similar and motion vector displacements that are co-linear with those of the first picture in the GOF, they may be coded as B pictures. When a picture is encountered having a motion speed that is not the same as that of the first picture in the GOF, the picture may be coded as a P picture. In some embodiments, a sequence of B pictures that terminates in a P picture may be called a “group of frames” (GOF).

    Abstract translation: 提出了一种在视频编码过程中动态选择I，P和B帧数量的有效方法。 视频序列的短期预先分析产生在任何两个存储的图像之间编码的可变数量的B帧。 一组帧（GOF）的第一图像可以被编码为B图像。 针对GOF的第一张照片计算GOF的每张照片的运动速度。 除了例外，只要后续图像显示与GOF中的第一图像相同的运动速度和与GOF中的第一图像共同的运动矢量位移，则它们可以被编码为B图像。 当遇到具有与GOF中的第一图像的运动速度不同的运动速度的图像时，图像可以被编码为P图像。 在一些实施例中，终止于P图像的B图像序列可以被称为“帧组”（GOF）。

    TEXTURE REPLACEMENT IN VIDEO SEQUENCES AND IMAGES
    5.
    发明申请
    TEXTURE REPLACEMENT IN VIDEO SEQUENCES AND IMAGES 有权
    视频序列和图像中的纹理替换

    公开(公告)号：US20080055332A1

    公开(公告)日：2008-03-06

    申请号：US11926868

    申请日：2007-10-29

    Applicant: Adriana Dumitras ,  Barin Haskell

    Inventor： Adriana Dumitras ,  Barin Haskell

    IPC: G09G5/00

    CPC classification number: G06T11/001 ,  G06T7/40 ,  G06T7/41 ,  G06T9/00 ,  G06T9/001 ,  H04N19/14 ,  H04N19/167 ,  H04N19/17 ,  H04N19/186 ,  H04N19/23 ,  H04N19/27

    Abstract: Systems and methods for reducing bit rates by replacing original texture in a video sequence with synthesized texture. Reducing the bit rate of the video sequence begins by identifying and removing selected texture from frames in a video sequence. The removed texture is analyzed to generate texture parameters. New texture is synthesized using the texture parameters in combination with a set of constraints. Then, the newly synthesized texture is mapped back into the frames of the video sequence from which the original texture was removed. The resulting frames are then encoded. The bit rate of the video sequence with the synthesized texture is less than the bit rate of the video sequence with the original texture. Also, the ability of a decoder to decode the new video sequence is not compromised because no assumptions are made about the texture synthesis capabilities of the decoder.

    Abstract translation: 通过用合成纹理替换视频序列中的原始纹理来降低比特率的系统和方法。 通过从视频序列中的帧识别和去除所选纹理，降低视频序列的比特率。 分析去除的纹理以生成纹理参数。 使用纹理参数和一组约束组合新的纹理。 然后，将新合成的纹理映射回去除原始纹理的视频序列的帧。 然后对所得到的帧进行编码。 具有合成纹理的视频序列的比特率小于具有原始纹理的视频序列的比特率。 此外，解码器解码新视频序列的能力不会受到损害，因为没有对解码器的纹理合成能力做出假设。

    DETERMINING THE NUMBER OF UNIDIRECTIONAL AND BIDIRECTIONAL MOTION COMPENSATED FRAMES TO BE ENCODED FOR A VIDEO SEQUENCE AND DETECTING SCENE CUTS IN THE VIDEO SEQUENCE
    6.
    发明申请
    DETERMINING THE NUMBER OF UNIDIRECTIONAL AND BIDIRECTIONAL MOTION COMPENSATED FRAMES TO BE ENCODED FOR A VIDEO SEQUENCE AND DETECTING SCENE CUTS IN THE VIDEO SEQUENCE 有权
    确定编码视频序列的视觉和双向运动补偿框架的数量，并在视频序列中检测场景

    公开(公告)号：US20080043847A1

    公开(公告)日：2008-02-21

    申请号：US11876766

    申请日：2007-10-22

    Applicant: BARIN HASKELL ,  Adriana Dumitras ,  Atul Puri

    Inventor： BARIN HASKELL ,  Adriana Dumitras ,  Atul Puri

    IPC: H04B1/66

    CPC classification number: H04N19/87 ,  H04N19/114 ,  H04N19/142 ,  H04N19/147 ,  H04N19/177

    Abstract: Methods for processing a set of successive video frames in two passes to determine the number of bidirectional (B) and unidirectional (P) motion compensated frames to be encoded in a video coding system. During the first pass, motion vectors and motion costs are computed for each frame and a derived cost value is computed based on the motion cost of at least one frame. The derived cost value is used to determine the number (NB) of B-frames to be encoded in the set of successive frames. In the second pass, the set of successive frames are encoded where NB frames are encoded as B-frames and some or all motion vectors computed in the first pass are re-used in the second pass. A scene cut detection method is also provided where an impulse-like increase in a ratio of motion costs is monitored.

    Abstract translation: 用于在两遍中处理一组连续视频帧的方法，以确定要在视频编码系统中编码的双向（B）和单向（P）运动补偿帧的数量。 在第一次通过期间，针对每个帧计算运动矢量和运动成本，并且基于至少一帧的运动成本来计算导出成本值。 导出成本值用于确定要在该组连续帧中编码的B帧的数目（N SUB B B）。 在第二遍中，编码连续帧的集合，其中N B个帧被编码为B帧，并且在第二遍中重新使用在第一遍中计算的一些或全部运动矢量。 还提供了一种场景切断检测方法，其中监测运动成本比例的脉冲状增加。

    Method and apparatus for variable accuracy inter-picture timing specification for digital video encoding
    7.
    发明申请
    Method and apparatus for variable accuracy inter-picture timing specification for digital video encoding 有权
    用于数字视频编码的可变精度画面间时序规范的方法和装置

    公开(公告)号：US20070274395A1

    公开(公告)日：2007-11-29

    申请号：US11835773

    申请日：2007-08-08

    Applicant: BARIN HASKELL ,  David Singer ,  Adriana Dumitras ,  Atul Puri

    Inventor： BARIN HASKELL ,  David Singer ,  Adriana Dumitras ,  Atul Puri

    IPC: H04N7/12 ,  H04B1/66 ,  H04N5/91

    CPC classification number: H04N19/513 ,  G06T9/005 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/40 ,  H04N19/43 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/51 ,  H04N19/577 ,  H04N19/587 ,  H04N19/61 ,  H04N19/91 ,  H04N21/4305

    Abstract: A method and apparatus for variable accuracy inter-picture timing specification for digital video encoding is disclosed. Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted.

    Abstract translation: 公开了一种用于数字视频编码的可变精度画面间时序规范的方法和装置。 具体地说，本发明公开了一种允许以非常有效的方式编码附近视频图像的相对定时的系统。 在一个实施例中，确定当前视频图像和附近视频图像之间的显示时间差。 然后将显示时间差编码为视频图像的数字表示。 在优选实施例中，附近的视频图像是最近发送的存储图像。 对于编码效率，可以使用可变长度编码系统或算术编码对显示时间差进行编码。 在替代实施例中，显示时间差被编码为2的幂，以减少发送的比特数。

    TEXTURE REPLACEMENT IN VIDEO SEQUENCES AND IMAGES
    8.
    发明申请
    TEXTURE REPLACEMENT IN VIDEO SEQUENCES AND IMAGES 有权
    视频序列和图像中的纹理替换

    公开(公告)号：US20070268301A1

    公开(公告)日：2007-11-22

    申请号：US11246607

    申请日：2005-10-07

    Applicant: Adriana Dumitras ,  Barin Haskell

    Inventor： Adriana Dumitras ,  Barin Haskell

    IPC: G09G5/00

    CPC classification number: G06T11/001 ,  G06T7/40 ,  G06T7/41 ,  G06T9/00 ,  G06T9/001 ,  H04N19/14 ,  H04N19/167 ,  H04N19/17 ,  H04N19/186 ,  H04N19/23 ,  H04N19/27

    Abstract: Systems and methods for reducing bit rates by replacing original texture in a video sequence with synthesized texture. Reducing the bit rate of the video sequence begins by identifying and removing selected texture from frames in a video sequence. The removed texture is analyzed to generate texture parameters. New texture is synthesized using the texture, parameters in combination with a set of constraints. Then, the newly synthesized texture is mapped back into the frames of the video sequence from which the original texture was removed. The resulting frames are then encoded. The bit rate of the video sequence with the synthesized texture is less than the bit rate of the video sequence with the original texture. Also, the ability of a decoder to decode the new video sequence is not compromised because no assumptions are made about the texture synthesis capabilities of the decoder.

    Abstract translation: 通过用合成纹理替换视频序列中的原始纹理来降低比特率的系统和方法。 通过从视频序列中的帧识别和去除所选纹理，降低视频序列的比特率。 分析去除的纹理以生成纹理参数。 使用纹理合成新的纹理，参数与一组约束组合。 然后，将新合成的纹理映射回去除原始纹理的视频序列的帧。 然后对所得到的帧进行编码。 具有合成纹理的视频序列的比特率小于具有原始纹理的视频序列的比特率。 此外，解码器解码新视频序列的能力不会受到损害，因为没有对解码器的纹理合成能力做出假设。

    Multipass video encoding and rate control using subsampling of frames
    10.
    发明申请
    Multipass video encoding and rate control using subsampling of frames 有权
    多帧视频编码和速率控制采用子采样帧

    公开(公告)号：US20070116126A1

    公开(公告)日：2007-05-24

    申请号：US11384379

    申请日：2006-03-21

    Applicant: Barin Haskell ,  Adriana Dumitras ,  Hsi-Jung Wu ,  Xin Tong ,  Thomas Pun

    Inventor： Barin Haskell ,  Adriana Dumitras ,  Hsi-Jung Wu ,  Xin Tong ,  Thomas Pun

    IPC: H04N11/02 ,  H04N7/12

    CPC classification number: H04N19/587 ,  H04N19/115 ,  H04N19/132 ,  H04N19/15 ,  H04N19/194 ,  H04N19/196

    Abstract: An encoder includes an encoder engine, a storage device and a controller to implement an iterative coding process. The encoder engine compresses a selected portion of a data sequence. The storage device stores the compressed portion of the data sequence after each iteration. The controller selects the portion of the data sequence to compress for each iteration. The controller gathers statistics from the compressed portion of the data sequence. The gathered statistics include statistics generated by the selected frames and statistics extrapolated from the selected frames for the non-selected frames. The controller adjusts coding parameters of the encoder engine on each iteration until the gathered statistics meet a specified performance requirement.

    Abstract translation: 编码器包括编码器引擎，存储装置和控制器，以实现迭代编码处理。 编码器引擎压缩数据序列的选定部分。 存储装置在每次迭代之后存储数据序列的压缩部分。 控制器为每次迭代选择数据序列的部分进行压缩。 控制器从数据序列的压缩部分收集统计信息。 所收集的统计信息包括由所选择的帧生成的统计信息和对于未选择的帧从所选择的帧中推断的统计信息。 控制器在每次迭代中调整编码器引擎的编码参数，直到收集到的统计信息达到规定的性能要求。

Patent Agency Ranking