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    • 4. 发明授权
    • Video compression
    • 视频压缩
    • US07164715B2
    • 2007-01-16
    • US10343081
    • 2001-07-27
    • Michael James Knee
    • Michael James Knee
    • H04B1/66H04N7/12
    • H04N19/507
    • In compression coding of picture sequences, a measure of picture difference is generated and compared with a picture difference threshold. The comparison is used in selecting between the use of predicted (P-pictures) and non-predicted has an initial value adapted to promote the use of an I-picture at or close to a scene change in the picture sequence, and changes in time in such a manner as to increase the probability of selection of a I-picture with an increase in the time since selection of the last I-picture.
    • 在图像序列的压缩编码中,产生图像差异的度量,并与图像差异阈值进行比较。 比较用于在预测(P图像)的使用和非预测之间的选择中具有适于促进在图像序列中或接近于图像序列中的场景变化的I图像的使用的初始值,以及时间的变化 以增加从选择最后的I图像后的时间的增加来增加I图像的选择的概率的方式。
    • 5. 发明授权
    • Video signal processing with motion compensation at low bandwidth
    • 具有低带宽运动补偿的视频信号处理
    • US5754246A
    • 1998-05-19
    • US387725
    • 1995-02-16
    • Barry Flannaghan
    • Barry Flannaghan
    • H04N7/01
    • H04N7/0135H04N7/01H04N7/014
    • A method for reducing the deleterious effects of motion in a video signal process. The video signal process is conducted at high bandwidth without motion compensation and a like video signal process is conducted at low bandwidth without motion compensation to produce a low bandwidth control signal. A similar video signal process with motion compensation is conducted at low bandwidth to produce a low bandwidth motion compensated signal. The low bandwidth control signal and low bandwidth motion compensated signal are compared to produce an error signal which is subtracted from the high bandwidth video signal process. Video signal procession apparatus includes parallel high and low bandwidth paths. The high bandwidth path contains a processing unit conducting a video signal process at high bandwidth, the low bandwidth path contains a differential video processor providing the difference between two low bandwidth video processes, each equivalent in function to the high bandwidth video signal process, but only one being motion compensated. Additional components combine the high and low bandwidth paths.
    • PCT No.PCT / GB94 / 01252 Sec。 371日期1995年2月16日 102(e)日期1995年2月16日PCT提交1994年6月10日PCT公布。 出版物WO94 / 30010 PCT 日期1994年12月22日一种用于减少视频信号处理中的运动的有害影响的方法。 视频信号处理在没有运动补偿的高带宽的情况下进行,并且在低带宽下进行类似的视频信号处理而不进行运动补偿以产生低带宽控制信号。 具有运动补偿的类似视频信号处理以低带宽进行,以产生低带宽运动补偿信号。 比较低带宽控制信号和低带宽运动补偿信号,从而产生从高带宽视频信号处理中减去的误差信号。 视频信号处理装置包括并行的高和低带宽路径。 高带宽路径包含以高带宽进行视频信号处理的处理单元,低带宽路径包含差分视频处理器,提供两个低带宽视频处理之间的差异,每个低功能视频进程的功能与高带宽视频信号处理功能相同,但仅限于 一个是运动补偿。 其他组件结合了高和低带宽路径。
    • 9. 发明授权
    • Video signal processing
    • 视频信号处理
    • US07425993B2
    • 2008-09-16
    • US10516068
    • 2003-05-29
    • Barry FlannaghanMartin Weston
    • Barry FlannaghanMartin Weston
    • H04N5/04
    • H04N5/126H04N5/14H04N5/91
    • A method of generating an orthogonally sampled video signal based on a line phase measure. In a first aspect the input signal is sampled by a clock locked to the average line frequency of a video input and the resulting samples are time shifted, optionally with or without interpolation, to an orthogonal sampling grid. In a second aspect input samples are taken and shifted to an orthogonal sampling grid according to a line phase measure. The line phase measure can be derived from a number of measurements or interpolated. In one embodiment a delay is employed so that a measure of a later sample is used to shift an earlier sample.
    • 一种基于线相位测量产生正交采样视频信号的方法。 在第一方面,输入信号被锁定到视频输入的平均线路频率的时钟采样,并且所得到的样本被可选地带有或没有插值地时间移位到正交采样网格。 在第二方面,根据线相位测量,输入样本被取出并移位到正交采样网格。 线相位测量可以从多个测量或插值得到。 在一个实施例中,采用延迟,以便采用稍后样本的量度来移动较早的样本。