Videophone apparatus with privacy protection
    21.
    发明授权
    Videophone apparatus with privacy protection 失效
    具有隐私保护的视频电话设备

    公开(公告)号:US06590601B2

    公开(公告)日:2003-07-08

    申请号:US09788451

    申请日:2001-02-21

    IPC分类号: H04N714

    CPC分类号: H04N7/148 H04N7/147

    摘要: A videophone takes a live picture of the user, sends the live picture during part of a call, generates a processed picture different from the live picture, and sends the processed picture during another part of the call. The processed picture may be prepared in advance, or may be generated by combining the live picture with a prepared picture. Alternatively, the processed picture may be obtained by increasing a quantization coefficient of the live picture, producing a mosaic effect that disguises the live picture. The processed picture can be sent to protect the privacy of the videophone user, or to provide appropriate transition at the beginning or end of the call. The processed picture can also be sent when the call is placed on hold.

    摘要翻译: 视频电话拍摄用户的实时图像,在呼叫的一部分期间发送实况图像,生成与实况图片不同的处理图像,并且在呼叫的另一部分期间发送处理的图像。 经处理的图像可以预先准备,或者可以通过将实时图像与准备的图像组合来生成。 或者,可以通过增加实时图像的量化系数来获得处理后的图像,从而产生掩盖实时图像的马赛克效果。 可以发送处理的图像以保护视频电话用户的隐私,或者在呼叫的开始或结束时提供适当的转换。 当呼叫置于保持状态时,也可以发送处理后的图像。

    Color conversion device and color conversion method
    22.
    发明授权
    Color conversion device and color conversion method 有权
    颜色转换装置和颜色转换方法

    公开(公告)号:US06434268B1

    公开(公告)日:2002-08-13

    申请号:US09293180

    申请日:1999-04-16

    IPC分类号: G06K940

    CPC分类号: H04N1/6002 H04N1/6027

    摘要: By changing coefficients of second-order and first-order calculation terms relating to respective hues, and first-order calculation terms in the form of comparison-result data relating to respective inter-hue areas, only the target hue or inter-hue area among the six hues of red, blue, green, yellow, cyan, and magenta, and the six inter-hue areas can be varied, without affecting other hues and inter-hue areas. Thus, the six hues and six inter-hue areas can be corrected independently, and the large-capacity memory is not required.

    摘要翻译: 通过改变与各个色相相关的二阶和一阶计算项的系数,以及与各个色​​调区相关的比较结果数据形式的一阶计算项,仅仅是目标色相或色间间的区域, 红色,蓝色,绿色,黄色,青色和品红色的六种色调,六种色相区域可以变化,而不影响其他色调和色间区域。 因此,可以独立地校正六个色调和六个色间区域,并且不需要大容量存储器。

    Motion vector detection system
    23.
    发明授权
    Motion vector detection system 失效
    运动矢量检测系统

    公开(公告)号:US06414995B2

    公开(公告)日:2002-07-02

    申请号:US09771550

    申请日:2001-01-30

    IPC分类号: H04N712

    摘要: The present invention relates to a motion vector detection method and system for detecting a motion vector for motion compensation in moving picture compression. The motion vector detection system reduces the amount of operations without degrading the quality of an image. A vector memory stores a motion vector having been obtained. A predicted motion vector calculator predicts the motion vector of a block to be predicted based upon the motion vector of a block adjacent to the block to be predicted. The search range determiner determines a search range based upon the motion vector predicted. The motion vector detector performs block matching within the search range.

    摘要翻译: 本发明涉及一种用于检测运动图像压缩中运动补偿的运动矢量的运动矢量检测方法和系统。 运动矢量检测系统减少了操作量而不降低图像的质量。 向量存储器存储已经获得的运动矢量。 预测运动矢量计算器基于与要预测的块相邻的块的运动矢量来预测要预测的块的运动矢量。 搜索范围确定器基于预测的运动矢量来确定搜索范围。 运动矢量检测器在搜索范围内执行块匹配。

    Coding apparatus
    25.
    发明授权
    Coding apparatus 失效
    编码装置

    公开(公告)号:US5432556A

    公开(公告)日:1995-07-11

    申请号:US189202

    申请日:1994-01-31

    摘要: A coding apparatus reduces a digital image signal. The coding apparatus includes a block formatting circuit for dividing the digital image signal into blocks of a plurality of picture elements, an orthogonal transforming circuit for transforming the blocks of plurality of picture elements into a plurality of coefficients, an adaptive quantizing unit for quantizing the plurality of coefficients with a quantization table, a calculating circuit that divides each block of the digital image signal into a plurality of sub-blocks and obtains a plurality of indexes, and a detecting circuit that obtains a maximum index and a minimum index from the plurality of indexes. Each index indicates a degree of change between the picture elements in a sub-block of the plurality of sub-blocks. The coding apparatus further includes a subtracting unit that obtains a difference between the maximum index and the minimum index, and a selecting unit that obtains the quantization table from a plurality of quantization tables according to the minimum index and the difference. As a result, the image quality of the background having little change in the signal is kept good.

    摘要翻译: 编码装置减少数字图像信号。 该编码装置包括用于将数字图像信号分割为多个图像元素的块格式化电路,用于将多个图像元素的块变换成多个系数的正交变换电路,用于量化多个像素的自适应量化单元 具有量化表的系数的计算电路,将数字图像信号的每个块分割成多个子块并获得多个索引的计算电路,以及从多个子帧获得最大索引和最小索引的检测电路 索引。 每个索引指示多个子块的子块中的图像元素之间的变化程度。 编码装置还包括获取最大索引和最小索引之间的差的减法单元,以及根据最小索引和差异从多个量化表中获取量化表的选择单元。 结果,信号的变化小的背景的图像质量保持良好。

    Digital FM demodulator with distortion correction
    26.
    发明授权
    Digital FM demodulator with distortion correction 失效
    数字FM解调器,具有失真校正功能

    公开(公告)号:US4862099A

    公开(公告)日:1989-08-29

    申请号:US233143

    申请日:1988-08-17

    IPC分类号: H03D3/00 H04N5/92

    摘要: A frequency demodulator includes an analog-to-digital converter for converting an inputted FM signal into a digital signal. A 90.degree. phase shifter is used to phase shift the converted digital signal. The phase shifted signal and the converted signal are utilized to determine the results of tan.sup.-1 (X/Y). X represents the converted signal, and Y represents the phase shifted signal. The result from the calculation is delayed for a period of time equal to one sampling cycle. The frequency demodulator also includes a subtractor for subtracting the delayed signal from the calculation result. A discontinuity corrector corrects any discontinuity in an output from the subtractor, and a reversal phenomenon compensator compensates the output from the discontinuity corrector when the output from the discontinuity corrector exceeds a predetermined range of levels. These levels correspond to an appearance of discrete lines of black or white color on a reproduced picture.

    摘要翻译: 频率解调器包括用于将输入的FM信号转换为数字信号的模数转换器。 使用90°移相器对转换的数字信号进行相移。 使用相移信号和转换后的信号来确定tan-1(X / Y)的结果。 X表示转换后的信号,Y表示相移信号。 计算结果延迟一段等于一个采样周期的时间。 频率解调器还包括用于从计算结果中减去延迟信号的减法器。 不连续校正器校正来自减法器的输出中的任何不连续性,并且当来自不连续校正器的输出超过预定的电平范围时,反转现象补偿器补偿来自不连续校正器的输出。 这些电平对应于再现图像上的黑色或白色的离散线的外观。

    Image encoding device and image encoding method
    27.
    发明授权
    Image encoding device and image encoding method 失效
    图像编码装置和图像编码方法

    公开(公告)号:US07751474B2

    公开(公告)日:2010-07-06

    申请号:US10545617

    申请日:2003-11-27

    IPC分类号: H04N7/12

    摘要: An encoding controller (106) generates and outputs a current skip signal (SKi) to a switch circuit (108), and outputs a quantization parameter (Qp) for controlling a code amount after the encoding processing of a current VOP by an encoder (103) using a current scene change signal (SCi), to an encoder (106). The current scene change signal (SCi) is set on the basis of the current VOP, a previous scene change signal (SCi-1), and a previous skip signal (SKi-1).

    摘要翻译: 编码控制器(106)生成并将当前跳过信号(SKi)输出到开关电路(108),并且通过编码器(103)输出用于控制当前VOP的编码处理之后的代码量的量化参数(Qp) )使用当前场景改变信号(SCi)到编码器(106)。 基于当前VOP,前一场景改变信号(SCi-1)和先前的跳过信号(SKi-1)来设置当前场景改变信号(SCi)。

    Image compression of selected regions based on transmission bit rate, motion, and/or region information, and bit selection before compression based on transmission bit rate
    29.
    发明授权
    Image compression of selected regions based on transmission bit rate, motion, and/or region information, and bit selection before compression based on transmission bit rate 失效
    基于传输比特率,运动和/或区域信息的所选区域的图像压缩,以及基于传输比特率的压缩之前的比特选择

    公开(公告)号:US06922490B2

    公开(公告)日:2005-07-26

    申请号:US09816324

    申请日:2001-03-26

    摘要: An image encoding device is provided that can transmit encoded image data without lowering the frame rate even when the transmission speed of the transmission path is lowered. An encoded region designator selects the region that is to be encoded, in the input image, depending on the bit rate of the transmission path. Only such a region that is designated by the encoded region designator is encoded. The encoded region designator may be one which selects the region that is to be encoded, according to the bit rate of the transmission path, and the motion vector detected by the image encoding circuit. As an alternative, an encoded region designator may be used which selects the region that is to be encoded according to the bit rate of the transmission path, and the information on the designated region supplied from the outside. Also, a selector limiting the number of bits of the signal from the image signal input circuit may be provided, and when the bit rate of the transmission path is lowered, the number of bits of the input image may be adaptively switched.

    摘要翻译: 提供了即使当传输路径的传输速度降低时也可以传输编码图像数据而不降低帧速率的图像编码装置。 编码区域指示符根据传输路径的比特率在输入图像中选择要被编码的区域。 只有由编码区域指示符指定的这样的区域被编码。 编码区域指示符可以是根据传输路径的比特率和由图像编码电路检测到的运动矢量来选择要被编码的区域的区域。 作为替代,可以使用编码区域指示符,其根据传输路径的比特率以及从外部提供的指定区域上的信息来选择要被编码的区域。 此外,可以提供限制来自图像信号输入电路的信号的位数的选择器,并且当传输路径的比特率降低时,可以自适应地切换输入图像的比特数。

    Video signal encoding method and system
    30.
    发明授权
    Video signal encoding method and system 失效
    视频信号编码方法和系统

    公开(公告)号:US06480670B1

    公开(公告)日:2002-11-12

    申请号:US09449494

    申请日:1999-11-29

    IPC分类号: H04N736

    摘要: In an image signal encoding method for encoding an image signal using motion compensation, a motion vector is found by means of a block matching method, a first distortion SEmc of motion compensated prediction associated with the motion vector, and a second distortion SEnomc of prediction without motion compensation are detected, the motion vector is used for for inter-picture prediction encoding when SEnomc>SEmc+K, with K being a constant greater than 0, and a vector having a value zero is used, in place of the motion vector, for inter-picture prediction encoding when SEnomc≦SEmc+K. In another aspect, a speed of motion in a sequence of pictures is detected, and for a part of the sequence of pictures detected to contain a quick motion, the prediction encoding is performed using one-way prediction encoding, and for a part of the sequence of pictures without a quick motion, prediction encoding is performed using bi-directional prediction encoding. In another aspect, the image signal is subsampled for each field, and a motion vector is determined using the field-subsampled image signal.

    摘要翻译: 在用于使用运动补偿对图像信号进行编码的图像信号编码方法中,通过块匹配方法,与运动矢量相关联的运动补偿预测的第一失真SEmc以及无运动补偿预测的第二失真SEnomc,找到运动矢量 检测到运动补偿时,运动矢量用于SEnomc> SEmc + K时的画面间预测编码,其中K为大于0的常数,使用零值的矢量代替运动矢量, 用于当SEnomc <= SEmc + K时的画面间预测编码。 在另一方面,检测图像序列中的运动速度,并且对于被检测为包含快速运动的图像序列的一部分,使用单向预测编码执行预测编码,并且对于一部分 没有快速运动的图像序列,使用双向预测编码执行预测编码。 在另一方面,对于每个场对图像信号进行二次采样,并且使用场二次采样的图像信号来确定运动矢量。