Process for maximizing the effectiveness of quantization matrices in video codec systems
    21.
    发明申请
    Process for maximizing the effectiveness of quantization matrices in video codec systems 审中-公开
    用于最大化视频编解码系统中量化矩阵的有效性的过程

    公开(公告)号:US20050190836A1

    公开(公告)日:2005-09-01

    申请号:US11047423

    申请日:2005-01-31

    IPC分类号: H04N7/12 H04N7/26 H04N7/50

    摘要: A method and apparatus evaluates quantization matrices used in video codec systems. Two primary factors are considered in making these estimates. The first is the human visual system contrast sensitivity function. This function measures how well a quantization matrix fits human visual characteristics. The second factor is a typical viewing setting, such as a range of typical viewing distances. For consumer use, the viewing range is one to four times picture height. For professional use, it is assumed the viewing range is one-half to three times picture height. The quantization matrix used in a video codec system defines the quantization step for different frequency bands. This quantization step is essentially equivalent to the allowable error in a frequency band. The present invention evaluates the quantization matrix for its effectiveness in hiding distortion errors. By using this evaluation scheme, the quantization matrix can be modified as needed, and the overall performance of the quantization matrix in a video codec system is improved substantially.

    摘要翻译: 方法和装置评估在视频编解码系统中使用的量化矩阵。 在作出这些估计时,考虑了两个主要因素。 第一个是人类视觉系统的对比敏感度函数。 该函数测量量化矩阵适合人类视觉特性的程度。 第二个因素是典型的观看设置,例如典型观看距离的范围。 对于消费者来说,观看范围是图像高度的一到四倍。 对于专业使用,假设观看范围是图像高度的一半到三倍。 在视频编解码器系统中使用的量化矩阵定义了不同频带的量化步长。 该量化步骤基本上等于频带中的容许误差。 本发明评估了其在隐藏失真误差方面的有效性的量化矩阵。 通过使用该评价方式,可以根据需要修改量化矩阵,并且在视频编解码系统中的量化矩阵的总体性能得到显着提高。

    Coding compression method and coding compression apparatus
    25.
    发明授权
    Coding compression method and coding compression apparatus 有权
    编码压缩方法和编码压缩装置

    公开(公告)号:US06343153B1

    公开(公告)日:2002-01-29

    申请号:US09283983

    申请日:1999-04-02

    IPC分类号: G06K936

    摘要: A coding compression method for encoding the video image signal with a variable bit rate includes performing coding to the video image signal for each predetermined coding unit in accordance with a predetermined first coding parameter, which coding is completed within the coding unit, thereby generating a first coded stream, calculating a second coding parameter of the video image signal for each the predetermined coding unit while generating the first coded stream, indicating a partial section of the first coded stream, the partial section comprising the predetermined coding units, editing the second coding parameters corresponding to the designated subsections, performing coding to the video image signal of the designated subsections in accordance with the edited second coding parameters thereby to produce a second coded stream, and replacing a partial section of the first coded stream with at least a partial section of the second coded stream, the partial section of the second coded stream corresponding to the partial section of the first coded stream.

    摘要翻译: 用于以可变比特率对视频信号进行编码的编码压缩方法包括根据预定的第一编码参数对每个预定编码单元对视频信号进行编码,该编码在编码单元内完成,从而产生第一 编码流,计算每个预定编码单元的视频信号的第二编码参数,同时产生指示第一编码流的部分部分的第一编码流,包括预定编码单元的部分部分,编辑第二编码参数 对应于所指定的子部分,根据编辑的第二编码参数对指定子部分的视频图像信号执行编码,从而产生第二编码流,并且用至少部分部分部分替换第一编码流的部分部分 第二编码流,第二编码流的部分部分 流对应于第一编码流的部分部分。

    Production apparatus and content distribution system
    26.
    发明授权
    Production apparatus and content distribution system 有权
    生产设备和内容分发系统

    公开(公告)号:US08977099B2

    公开(公告)日:2015-03-10

    申请号:US13819840

    申请日:2011-12-14

    摘要: Provided is a production apparatus that can produce a distribution content that offers an even richer color tone expression during playback of video. The production apparatus for producing a distribution content including distribution video data is constituted by an original acquisition unit that acquires original video data; a distribution video acquisition unit that acquires the distribution video data, the distribution video data having been generated by conversion of the original video data to a lower gradation; a difference generation unit that generates difference data between the original video data and the distribution video data; and an output unit that outputs the difference data. A playback apparatus plays back the distribution content.

    摘要翻译: 提供一种可以产生在视频播放期间提供更加丰富的色调表现的分发内容的制作装置。 用于产生包括分发视频数据的分发内容的制作装置由获取原始视频数据的原始获取单元构成; 分发视频获取单元,其获取所述分配视频数据,所述分配视频数据是通过将所述原始视频数据转换为较低灰度而产生的; 差产生单元,其生成原始视频数据和分发视频数据之间的差分数据; 以及输出单元,输出差分数据。 播放装置回放分发内容。

    Moving picture coding method and moving picture decoding method
    27.
    发明授权
    Moving picture coding method and moving picture decoding method 有权
    运动图像编码方法和运动图像解码方法

    公开(公告)号:US08477838B2

    公开(公告)日:2013-07-02

    申请号:US13488169

    申请日:2012-06-04

    IPC分类号: H04N7/26 H04N11/04 H04N5/38

    摘要: A coding method for coding a picture in a moving picture with a processor configured to code, on a block-by-basis, each picture in the moving picture, to generate a coded stream. The processor transforms each picture into coefficients representing spatial frequency components and quantizes the coefficients with a quantization matrix. Identification information identifying the quantization matrix is provided in the coded stream in predetermined units to reduce the amount of data to be coded. The processor is configured to use a coded quantization matrix for a chroma component rather than a default quantization matrix.

    摘要翻译: 一种编码方法,用于对运动图像中的图像进行编码,其中处理器被配置为在逐帧的基础上对运动图像中的每个图像进行编码,以生成编码流。 处理器将每个图像变换成表示空间频率分量的系数,并用量化矩阵量化系数。 识别量化矩阵的识别信息以预定单位提供在编码流中以减少要编码的数据量。 处理器被配置为对色度分量而不是默认量化矩阵使用编码量化矩阵。