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    • 8. 发明授权
    • Method for detecting and removing errors exceeding a specific contrast
in digital video signals
    • 用于检测和去除超过数字视频信号中的特定对比度的误差的方法
    • US5606631A
    • 1997-02-25
    • US318733
    • 1994-10-13
    • Peter WeissBjorn Christensson
    • Peter WeissBjorn Christensson
    • G11B20/18H04N5/21H04N5/92H04N5/93H04N5/945G06K9/40
    • H04N5/21H04N5/945
    • A method for detecting and removing errors in pictures associated with a picture sequence in digital video sigals is disclosed. For this purpose an error detector and a filter for continuous processing of pixels associated with said pictures is used. The error detector detects an error if at least one error pixel, being a pixel with a specific contrast, i.e. difference in pixel intensities, is found when comparing the pixel intensities of pixels belonging to at least two pictures in said picture sequence. The error detector determines an error shape, and the filter which is an adaptive filter, replaces the intensity of a current error pixel with a mathematical function of pixel intensities of the current pixel and pixels surrounding the error shape.
    • PCT No.PCT / SE93 / 00314 Sec。 371日期:1994年10月13日 102(e)日期1994年10月13日PCT提交1993年4月8日PCT公布。 出版物WO93 / 21728 日期:1993年10月28日公开了一种用于检测和去除与数字视频信号中的图像序列有关的图像中的错误的方法。 为此,使用用于连续处理与所述图像相关联的像素的误差检测器和滤波器。 如果在比较属于所述图像序列中的至少两个图像的像素的像素强度时,发现具有特定对比度的像素(即,像素强度的差异)中的至少一个误差像素,则误差检测器检测到误差。 误差检测器确定误差形状,并且作为自适应滤波器的滤波器用当前像素的像素强度和围绕误差形状的像素的数学函数代替当前误差像素的强度。
    • 9. 发明授权
    • Method of correcting errors in digital VCR with horizontal and vertical
detection and correction
    • 用水平和垂直检测和校正来校正数字VCR中的误差的方法
    • US5598277A
    • 1997-01-28
    • US89887
    • 1993-07-12
    • Sang W. KimSeung H. KimChi S. Won
    • Sang W. KimSeung H. KimChi S. Won
    • G11B20/18H04N5/945H04N5/94
    • H04N5/945G11B20/1813
    • A method of correcting errors in a digital VCR in which the error correcting capability is maximized and probabilities that no error is detected and data decoding fails are minimized, by using a relatively small length of redundancy. The method comprises the first step of detecting errors from vertical and horizontal sections of a code of data played back from a tape and setting cross-points of the detected errors to flags, the second step of detecting errors from the horizontal code sections of the played back data, correcting the detected errors and erasing only the errors positioned at the cross-points set to the flags at the first steep, in ones of the horizontal code sections from which detectable but non-correctable errors are detected, and the third step of correcting the errors erased at the second in a vertical direction.
    • 通过使用相对较小的冗余长度来最小化校正错误校正能力最大化的数字VCR中的错误的方法和无错误被检测到的数据解码失败的方法。 该方法包括:检测从磁带重放的数据代码的垂直和水平部分的错误的第一步骤,并将检测到的错误的交叉点设置为标志;第二步骤,从所播放的水平代码部分检测错误 在检测到可检测但不可校正的错误的水平代码部分中的一个中修正检测到的错误并且仅擦除位于设置为第一陡峭的标志的交叉点处的错误,并且第三步骤 纠正在第二个垂直方向上擦除的错误。