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公开(公告)号：US06983015B1
公开(公告)日：2006-01-03
申请号：US09645748
申请日：2000-08-24
IPC分类号： H04N7/12
CPC分类号： H04N21/23424 , G11B27/032 , G11B27/036 , G11B2220/90 , H04N19/114 , H04N19/115 , H04N19/124 , H04N19/149 , H04N19/15 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/177 , H04N19/40 , H04N19/61 , H04N21/44016
摘要： Decoders A and B decode MPEG-2 bitstreams A and B. A switch (S1) switches from decoded stream A to decoded stream B to achieve a splice. The resulting bitstream is re-encoded in an encoder 4. A new transitional GOP is defined beginning at the splice. The new GOP is defined by picture type decision rules which may have the effect of changing the GOP compared to the GOPs of streams A and B. The new GOP provides an initial prediction of the position in stream B where the occupancy value of stream C should coincide with that of B. A target for the new number of bits in the new GOP is calculated as the sum of the normal allocation of bits for the new GOP plus the difference between the occupancy value of stream C at the splice and a prediction of the occupancy of stream B at the predicted position. The occupancy value of stream C is controlled in accordance with the target so that it tends towards the occupancy value of stream B at the predicted position.The target is updated regularly throughout the GOP on I and P frames. After the first update at the beginning of the transitional GOP, the target changes at the updates nominally by an amount VBV—diff which is the difference between occupancy of bit stream B on the current I or P frame and the occupancy at the next I or P frame. If VBV-diff is negative, the amount of change is limited to a limit value. The maximum value of the limit may be exceeded only once and the limit is then set to zero. The excess of VBV—diff over the limit is a value reduction—carry. Reduction carry is monitored, and if at the end of the transitional GOP it exceeds a threshold (e.g. zero), another transitional GOP is started. If VBV—diff is negative but does not exceed the limit, the target is reduced by VBV—diff and the limit is reduced by a proportion of VBV—diff. If VBV—diff is positive, then VBV—diff is averaged out over the target values for the remaining I and P frames in the GOP.
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公开(公告)号：US20050024345A1
公开(公告)日：2005-02-03
申请号：US10925241
申请日：2004-08-24
申请人： Peter Eastty , Peter Thorpe , Christopher Sleight
发明人： Peter Eastty , Peter Thorpe , Christopher Sleight
CPC分类号： G06F3/0488 , G06F3/04847 , H04H60/04
摘要： Data processing apparatus comprises an array of user-operable controls, the controls being adjustable by movement of a user's hand while touching a control; a detector for detecting when a user's hand is touching a control; a display screen for displaying respective screen icons associated with the controls; and a display processor, responsive to a detection that a user's hand is touching one of the controls, for altering the screen icon associated with that control.
摘要翻译： 数据处理装置包括用户可操作控制的阵列，所述控制可以通过用户的手的移动而在触摸控制的同时进行调节; 用于检测用户的手何时触摸控件的检测器; 用于显示与所述控件相关联的各个屏幕图标的显示屏幕; 以及显示处理器，响应于用户的手正在接触其中一个控件的检测，用于改变与该控件相关联的屏幕图标。
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公开(公告)号：US6160844A
公开(公告)日：2000-12-12
申请号：US944519
申请日：1997-10-06
CPC分类号： H04N19/40 , G11B27/031 , H04N5/9262
摘要： An MPEG2 encoded signal comprising intra-encoded pictures I and inter-encoded pictures B is decoded (70-74) to baseband and re-encoded (76) to I-pictures. The quantisation levels Q.sub.v and the motion vectors M.sub.v of the B pictures are retained unchanged and maintained in association with the corresponding pictures re-encoded as I-pictures. The I-pictures can be decoded to baseband, processed, and re-encoded as I-pictures without degradation. The I-pictures can then be re-encoded back to e.g. I, B pictures with minimal degradation. Alternatively, some of the I-pictures are decoded and converted to B pictures retaining unchanged the quantisation levels thereof.
摘要翻译： 包括帧内编码图像I和帧间编码图像B的MPEG2编码信号被解码（70-74）到基带并重新编码（76）到I图像。 B图像的量化水平Qv和运动矢量Mv保持不变并且与重新编码为I图像的对应图像相关联地保持。 I图像可以被解码为基带，处理和重新编码为I图像而不降级。 然后可以将I图像重新编码回到例如图像。 我，B图片与最小的退化。 或者，一些I图像被解码并转换成保留其量化水平不变的B图像。
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公开(公告)号：US6122327A
公开(公告)日：2000-09-19
申请号：US796067
申请日：1997-02-04
CPC分类号： H04W56/0035 , H04L27/22
摘要： A radio receiver for a digital cellular system or the like which transmits or receives, for example, voice signals by coding them, and easily and reliably detects a synchronizing signal. A synchronizing signal FCCH is detected by converting a base band converted transmitted signal with an analog-to-digital convertor circuit 17, and then by detecting a correlation value with a predetermined reference signal.
摘要翻译： 用于数字蜂窝系统等的无线电接收机，其通过编码它们来发送或接收例如语音信号，并且容易且可靠地检测同步信号。 通过用模数转换器电路17转换基带转换的发送信号，然后通过用预定的参考信号检测相关值来检测同步信号FCCH。
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公开(公告)号：US06101222A
公开(公告)日：2000-08-08
申请号：US977585
申请日：1997-11-25
申请人： Martin Rex Dorricott
发明人： Martin Rex Dorricott
CPC分类号： G11B27/28 , H04N19/142 , H04N19/179 , H04N19/87 , H04N5/147
摘要： A scene change detector sums the correlation maximum values of correlation surfaces produced by a motion vector determining circuit (2) across a current image and compares this with a threshold value (Thres) to detect scene changes. A statistical analysis of signals (V.sub.x, V.sub.y, Y) representing the current image may be made and a resulting value differentiated. Peaks in this differentiated value represent scene changes. Finally, rapid changes in the number of valid vectors found in a motion analysis of a current image may also be used to indicate a scene change.
摘要翻译： 场景变化检测器将由运动矢量确定电路（2）产生的相关表面的相关最大值相加在当前图像上，并将其与阈值（Thres）进行比较，以检测场景变化。 可以对表示当前图像的信号（Vx，Vy，Y）进行统计分析，得到的值被区分。 这个差异值中的峰值代表场景变化。 最后，在当前图像的运动分析中发现的有效矢量的数量的快速变化也可以用于指示场景变化。
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公开(公告)号：US6094491A
公开(公告)日：2000-07-25
申请号：US13852
申请日：1998-01-27
CPC分类号： H04H60/04 , H03K17/962 , H03K17/9622
摘要： A capacitive touch detection system, which can be used to inhibit motorized faders in an audio mixing system, includes touch detection circuits each having a respective conductive area for touch determination by detection of increased capacitance at the conductive area. The touch detection circuits are operable during predetermined active periods initiated by a clock generator which activates a pulse generator to produce an enable pulse EP1 for one detection circuit. The trailing edge of that enable pulse EP1 generates a non-overlapping enable pulse EP2 for the next detection circuit, and the process continues so that no more than one detection circuit is active at any time. This minimizes interaction between detection circuits if more than one conductive area is touched simultaneously.
摘要翻译： 可以用于抑制音频混合系统中的电动推子的电容式触摸检测系统包括触摸检测电路，每个触摸检测电路具有用于通过检测导电区域上的增加的电容来进行触摸确定的相应导电区域。 触摸检测电路可在由时钟发生器启动的预定有效周期期间操作，时钟发生器激活脉冲发生器以产生用于一个检测电路的使能脉冲EP1。 该使能脉冲EP1的后沿为下一个检测电路产生不重叠的使能脉冲EP2，并且该过程继续，使得在任何时间不超过一个检测电路处于活动状态。 如果同时触摸多于一个导电区域，则可以最小化检测电路之间的相互作用。
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公开(公告)号：US6069653A
公开(公告)日：2000-05-30
申请号：US153282
申请日：1998-09-15
申请人： John Hudson
发明人： John Hudson
IPC分类号： G08B13/196 , G08B21/00 , G09G5/00 , H04N7/18
CPC分类号： G08B13/19693 , G08B13/19673 , G08B13/19695 , H04N7/181
摘要： The present invention provides a security control system, comprising a system controller (2) arranged to receive video signals from a plurality of video sources, and to selectively output a subset of the received video signals for display on a display means, and a display controller (10, 12) arranged to receive the subset of video signals output by the system controller, and to process those signals to generate images for display on the display means. In accordance with the present invention, the system controller (2) is further arranged to receive alarm signals, each alarm signal being associated with a video source, the system controller (2) being responsive to receipt of an alarm signal to output the video signal of the associated video source to the display controller. The display controller (10, 12) is then arranged to cause any images generated from video signals associated with alarm signals to be displayed in a predetermined area (M11) of the display means.By ensuring that all of the video information associated with alarms is displayed in a predefined area, it is easier for the operator to review that video information in order to ensure that effective action is taken in response to the alarm condition(s).
摘要翻译： 本发明提供了一种安全控制系统，包括系统控制器（2），其被配置为从多个视频源接收视频信号，并且选择性地输出所接收的视频信号的子集以在显示装置上显示，以及显示控制器 （10,12），被布置为接收由系统控制器输出的视频信号的子集，并且处理这些信号以产生用于在显示装置上显示的图像。 根据本发明，系统控制器（2）还被布置为接收报警信号，每个报警信号与视频源相关联，系统控制器（2）响应于接收到报警信号以输出视频信号 的相关视频源到显示控制器。 然后，显示控制器（10,12）被布置成使得从与报警信号相关联的视频信号产生的任何图像显示在显示装置的预定区域（M11）中。 通过确保与警报相关联的所有视频信息都显示在预定区域中，操作者更容易查看该视频信息，以确保响应于该报警条件采取有效的动作。
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公开(公告)号：US6055339A
公开(公告)日：2000-04-25
申请号：US94895
申请日：1993-07-22
IPC分类号： G11B20/18 , G06T9/00 , H03M7/14 , H03M7/30 , H03M13/19 , H04N5/783 , H04N5/92 , H04N5/926 , H04N7/26 , H04N7/30 , H04N7/34 , H04N7/66 , H04N9/804 , H04N9/808 , H04N11/04 , G06K9/38
CPC分类号： H04N9/8042 , H04N19/126 , H04N19/186 , H04N19/593 , H04N19/61 , H04N19/63 , H04N5/9264 , H04N19/10 , H04N19/115 , H04N19/124 , H04N19/13 , H04N19/146 , H04N19/60 , H04N5/783
摘要： A video data compression system is described utilizing frequency separation and quantization. The video data is separated into primary frequency components (components 4, 5, 6) and secondary frequency components (components 0, 1, 2, 3). The primary frequency components undergo fewer frequency separating stages (N>M) than the secondary frequency components. The quantization step width (Q.sub.1, Q.sub.2) applied to the differing primary and secondary components is varied in dependence upon the relative human visual responsiveness (R(f.sub.s)) to the spatial frequency (f.sub.s) represented by that component. In addition, those frequency components that have undergone fewer frequency separating stages are subject to a larger quantization step width than the other frequency components since the fewer frequency combination stages such frequency components will subsequently undergo has the result that the image degradation introduced by quantization is less noticeable. The system also includes entropy encoding (42) using selectable complementary encoding and decoding tables. The system is particularly applicable to recording and reproducing apparatus.
摘要翻译： 利用频率分离和量化来描述视频数据压缩系统。 视频数据被分成主要频率分量（分量4,5,6）和次要频率分量（分量0,1,2,3）。 主频率分量比次频分量经历较少的频率分离级（N> M）。 应用于不同初级和次级分量的量化步长（Q1，Q2）根据相对于由该分量表示的空间频率（fs）的人类视觉响应性（R（fs））而变化。 另外，经过较少频率分离级的这些频率分量比其他频率分量承受更大的量化步长，因为这种频率分量随后将经历的较少的频率组合级具有由量化引入的图像劣化较少的结果 显。 该系统还包括使用可选择的补充编码和解码表的熵编码（42）。 该系统特别适用于记录和再现装置。
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公开(公告)号：US6021204A
公开(公告)日：2000-02-01
申请号：US947260
申请日：1997-10-08
申请人： Peter Charles Eastty
发明人： Peter Charles Eastty
CPC分类号： H04S7/40 , G01R13/408 , G01R23/16
摘要： Apparatus for analyzing audio signals from a stereo pair of audio channels, comprises: means for detecting the magnitudes of the audio signals of the two audio channels; first detector for detecting a degree of phase correlation between the audio signals of the two audio channels; and second detector for generating an indicator color for display in respect of the audio channels at a time of test, the indicator color having a hue, intensity and/or saturation dependent on at least the relative magnitudes of and the degree of phase correlation between the audio signals of the two audio channels at the time of test.
摘要翻译： 用于从立体声音频通道对分析音频信号的装置包括：用于检测两个音频通道的音频信号的大小的装置; 第一检测器，用于检测两个音频通道的音频信号之间的相位相关程度; 以及第二检测器，用于在测试时产生关于音频通道的显示的指示器颜色，所述指示符颜色具有至少取决于所述音频通道的相对幅度和相位相关程度之间的色相，强度和/或饱和度 在测试时两个音频通道的音频信号。
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公开(公告)号：US6018596A
公开(公告)日：2000-01-25
申请号：US816154
申请日：1997-03-12
CPC分类号： H04N5/142 , H04N19/186 , H04N19/63 , H04N19/10 , H04N19/102
摘要： A method or apparatus for processing an input frame of image data comprising converting the input frame into a plurality of output frames, the spatial frequency spectrum of each of said plurality of output frames being that of a respective predetermined frequency band of the spatial frequency spectrum of the input frame and applying separately to at least one of said plurality of output frames a respective gain.
摘要翻译： 一种用于处理图像数据的输入帧的方法或装置，包括将输入帧转换为多个输出帧，所述多个输出帧中的每一个的空间频谱是空间频谱的相应预定频带 所述输入帧并分别应用于所述多个输出帧中的至少一个输出帧相应的增益。
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