-
31.发明授权
公开(公告)号：US4536788A
公开(公告)日：1985-08-20
申请号：US488813
申请日：1983-04-26
CPC分类号： H04N9/64
摘要： A filter network suitable for translating a signal such as a demodulated "I" chrominance component of a composite color television signal is disclosed. The filter network comprises first and second cascaded sections with mutually grossly mismatched terminating impedances, and are passively interconnected via a resistance of a value which substantially precludes interaction between the sections over a given range of frequencies within the passband of the signals being translated. Both sections are separately excited with signals to be translated. The first section provides wideband filtering and a large amount of delay relative to that provided by the second section. The second section provides signal amplitude peaking within a given portion of the frequency passband of the first section.
摘要翻译： 公开了一种适用于转换诸如复合彩色电视信号的解调“I”色度分量的信号的滤波器网络。 滤波器网络包括具有相互严格不匹配的终端阻抗的第一和第二级联部分，并且通过一个值的电阻被动地互连，该电阻基本上排除了在被转换的信号的通带内的给定频率范围之间的部分之间的相互作用。 这两个部分被单独激发以被翻译的信号。 第一部分提供宽带滤波和相对于第二部分提供的大量延迟。 第二部分在第一部分的频率通带的给定部分内提供信号幅度峰化。
-
32.发明授权
公开(公告)号：US5485215A
公开(公告)日：1996-01-16
申请号：US246308
申请日：1994-05-19
CPC分类号： H04N7/015 , H04N19/436 , H04N19/61 , H04N19/85 , H04N7/01 , H04N7/0125 , H04N19/30
摘要： A system and method for filtering a digital signal having a relatively high data rate uses circuitry which operates at a lower data rate. The filter includes an input section which receives the input signal and which divides the input signal into a plurality of contiguous segments. The system also includes a first filter which receives samples representing one of the plurality of segments and adjacent samples from the next contiguous one of the segments and which filters all of the received samples to produce a first filtered signal. A second filter receives samples of the next contiguous segment and filters those samples to produce a second filtered signal. The filtered signals are combined by providing the samples of the second filtered signal immediately after the samples of the first filtered signal to produce a filtered output signal. The invention also relates to using respective timing signals associated with the segments to determine when the samples of the first and second filtered signals are provided.
摘要翻译： 用于对具有相对较高数据速率的数字信号进行滤波的系统和方法使用以较低数据速率操作的电路。 滤波器包括输入部分，其接收输入信号并且将输入信号划分成多个连续的段。 该系统还包括第一滤波器，其接收表示来自下一个相邻片段之一的多个片段和相邻样本中的一个的样本，并且对所接收的所有样本进行滤波以产生第一滤波信号。 第二滤波器接收下一连续段的采样并对这些采样进行滤波以产生第二滤波信号。 通过在第一滤波信号的采样之后立即提供第二滤波信号的样本来组合经滤波的信号，以产生经滤波的输出信号。 本发明还涉及使用与这些段相关联的相应定时信号来确定何时提供第一和第二滤波信号的采样。
-
33.发明授权Digital high definition television receiver with features that facilitate trick-play modes on a digital VCR 失效数字高分辨率电视接收机，具有促进数字录像机上的特技播放模式的特点
公开(公告)号：US5477397A
公开(公告)日：1995-12-19
申请号：US73789
申请日：1993-06-08
IPC分类号： H04N5/92 , G06T3/40 , G11B20/12 , H04N5/00 , H04N5/7826 , H04N5/783 , H04N5/926 , H04N5/93 , H04N7/01 , H04N7/26 , H04N7/32 , H04N7/52 , H04N9/804 , H04N9/82 , H04N5/78
CPC分类号： G06T3/4084 , G06T3/40 , H04N19/40 , H04N21/236 , H04N21/4147 , H04N21/434 , H04N5/9264 , H04N9/8042 , H04N5/78266 , H04N5/783 , H04N9/8227
摘要： A high-definition television receiver includes circuitry to decode a received high-definition television signal to produce a digital data stream representing the corresponding high-definition television image. In addition, the receiver includes circuitry which generates a signal representing a reduced resolution image from the decoded data stream. The receiver provides both the high-definition television signal and the reduced resolution signal at an output port. A video tape recorder (VTR) receives the two signals, segments them and formats them onto the tape in a manner which allows a majority of the reduced resolution segments to be recovered and displayed in at least one of the VTR's trick-play modes. The reduced resolution image may be from the same channel or from a different channel and may also be displayed as an inset picture (PIX-IN-PIX) in the main high-definition image.
摘要翻译： 高清晰度电视接收机包括用于解码所接收的高分辨率电视信号以产生表示对应的高分辨率电视图像的数字数据流的电路。 此外，接收机包括从解码的数据流生成表示降低分辨率图像的信号的电路。 接收机在输出端口提供高清晰度电视信号和降低分辨率信号。 磁带录像机（VTR）接收这两个信号，将它们分段，并将它们格式化成允许大多数缩小分辨率段在VTR的特技播放模式中恢复和显示的方式。 缩小分辨率图像可以来自相同的通道或来自不同的通道，并且还可以作为主高清晰图像中的插图（PIX-IN-PIX）显示。
-
公开(公告)号：US5387939A
公开(公告)日：1995-02-07
申请号：US87964
申请日：1993-07-06
CPC分类号： H04N7/007 , Y10S348/913
摘要： An NTSC compatible television system capable of enhanced resolution images with an appropriate receiver is described. The video transmission associated with this system may be received by a standard NTSC television receiver and displayed in letter box format. The added information required to achieve enhanced resolution in an 16 by 9 format is bit reduced and transmitted either during the mask areas present when viewing the signal on an NTSC standard receiver and/or in a quadrature channel typically not detectable without a special decoder by the NTSC receiver. The digital information transmitted during the mask areas, the NTSC image, and the digital information transmitted via the quadrature channel are combined to arrive at the enhanced resolution television display.
摘要翻译： 描述了能够使用合适的接收机来增强分辨率图像的NTSC兼容电视系统。 与该系统相关联的视频传输可以由标准NTSC电视接收机接收并以信箱格式显示。 在16乘9格式中实现增强分辨率所需的附加信息被减少并且在观看NTSC标准接收机处的信号期间存在的掩模区域中和/或在通常不可检测的正交信道中传输，而没有特殊解码器由 NTSC接收机。 在掩模区域期间发送的数字信息，NTSC图像和经由正交信道发送的数字信息被组合以得到增强的分辨率电视显示器。
-
公开(公告)号：US5329317A
公开(公告)日：1994-07-12
申请号：US954283
申请日：1992-09-30
摘要： A motion adaptive vertical filter is used to filter an interlaced video signal on a frame basis in areas of the image that are not in motion and on a field basis in areas that are in motion. A soft switch mixes the field filtered data and the frame filtered data in areas where there is relatively little motion to prevent artifacts which may be caused by abruptly switching between the two vertical filtering schemes. The frame vertical filter reduces the vertical resolution of still NTSC images to 180 cycles per picture height (CPH) while the field filter reduces the vertical resolution to 90 CPH.
摘要翻译： 运动自适应垂直滤波器用于在图像的不运动的区域中，并且在运动的区域中的场的基础上对基于帧的隔行扫描视频信号进行滤波。 软开关将场过滤数据和帧滤波数据混合在具有相对较少运动的区域中，以防止可能由两个垂直滤波方案之间的突然切换引起的伪影。 帧垂直滤波器将静止NTSC图像的垂直分辨率降低到每个图像高度（CPH）180个周期，而场滤波器将垂直分辨率降低到90 CPH。
-
公开(公告)号：US5325125A
公开(公告)日：1994-06-28
申请号：US950473
申请日：1992-09-24
IPC分类号： H03M7/30 , G06T5/20 , G06T9/00 , H03H17/00 , H03H17/02 , H04N5/14 , H04N7/26 , H04N7/30 , H04N7/32 , H04N7/50 , H04N7/133
CPC分类号： H03H17/0202 , H04N19/61 , H04N19/80 , H04N19/85 , H04N5/14
摘要： A video signal encoder uses an encoding system such as that developed by the Moving Picture Experts Group (MPEG). A key component of this encoding system reduces the number of bits required to encode the video signal. Apparatus according to the present invention, filters out high diagonal frequencies in the spatial domain of a video signal. Specifically, two dimensional (2-D) filtering is performed on frames of a video signal to filter out high diagonal spatial frequencies before the video signal is separated into blocks. These blocks may be encoded in fewer bits due to elimination of noise components and other image components having high diagonal frequencies.
摘要翻译： 视频信号编码器使用诸如由运动图像专家组（MPEG）开发的编码系统。 该编码系统的关键部件减少了编码视频信号所需的位数。 根据本发明的装置，滤除视频信号的空间域中的高对角频率。 具体地说，对视频信号的帧执行二维（2-D）滤波，以便在将视频信号分离成块之前滤除高对角空间频率。 由于消除了具有高对角线频率的噪声分量和其它图像分量，这些块可以以更少的比特编码。
-
37.发明授权Method and apparatus for transmission of signals for an extended definition television system 失效用于传输扩展定义电视系统的信号的方法和装置
公开(公告)号：US5278649A
公开(公告)日：1994-01-11
申请号：US743856
申请日：1991-08-12
CPC分类号： H04N7/007
摘要： The black level of the NTSC portion of an EDTV broadcast signal is set to a level N, typically twice as high as the normal 7.5 IRE units. This signal characteristic motivates the viewer or the automatic black level circuits of the NTSC receiver to raise the receiver's black level to about the same N IRE units for optimum reception of the transmitted signal. EDTV enhancement signals are transmitted in the range of +N to -N (for example, +15 to -15) IRE units. Since the NTSC receiver is adjusted to blank all signals below N IRE, the EDTV enhancement signals between +N and -N IRE levels do not trigger the display in the NTSC receiver, thereby maintaining the upper and lower band areas at a uniform black level without unwarranted speckles or other interference.
摘要翻译： EDTV广播信号的NTSC部分的黑电平被设置为N级，通常是正常7.5IRE单元的两倍。 该信号特征激励了NTSC接收机的观看者或自动黑电平电路，以将接收机的黑电平提升到大约相同的N个IRE单元，以便最佳地接收所发送的信号。 EDTV增强信号在+ N至-N（例如，+ 15至-15）IRE单位的范围内传输。 由于NTSC接收机被调整为将低于N IRE的所有信号置空，所以在+ N和-N IRE电平之间的EDTV增强信号不会触发NTSC接收机中的显示，从而将上和下频带区域保持在均匀的黑色电平而没有 无理的斑点或其他干扰。
-
公开(公告)号：US4620220A
公开(公告)日：1986-10-28
申请号：US508593
申请日：1983-06-28
CPC分类号： H04N9/646
摘要： A color television receiver includes a comb filter responsive to detected video signals for providing a wideband combed chrominance signal, which is coupled to chrominance processing circuits via a composite filter including plural mutually interactive resonant sections. An input resonant section of the filter serves to remove very high frequency interference signals including comb filter switching components from the chrominance signal path, and also coacts with the other filter sections to provide an amplitude characteristic having a sense to compensate for an oppositely directed amplitude characteristic associated with the detected video signals, over the passband of the wideband chrominance signals.
摘要翻译： 彩色电视接收机包括响应于检测到的视频信号的梳状滤波器，用于提供宽带梳状色度信号，该梳状滤波器经由包括多个相互交互的共振部分的复合滤波器耦合到色度处理电路。 滤波器的输入谐振部分用于从色度信号路径去除包括梳状滤波器开关元件的非常高频的干扰信号，并且与其它滤波器部分共同作用以提供具有补偿相反定向振幅特性的振幅特性 与所检测的视频信号相关联，在宽带色度信号的通带上。
-
39.发明授权Apparatus for symmetrically truncating two's complement binary signals as for use with interleaved quadrature signals 失效用于对称地截断二进制补码二进制信号以用于交错正交信号的装置
公开(公告)号：US4589084A
公开(公告)日：1986-05-13
申请号：US495116
申请日：1983-05-16
CPC分类号： G06F7/48 , G06F7/49952 , G06F7/49978
摘要： Symmetrical truncation of two's complement binary numbers is performed by simply discarding the LSB's of positive values and by adding "one" to the truncated negative value when any one of the discarded LSB's is a logical "one" value. Apparatus to perform an N bit truncation includes an incrementer, a two input AND gate and an N-input OR gate.
摘要翻译： 通过简单地丢弃正值的LSB来执行二进制补码二进制数的对称截断，并且当任何一个丢弃的LSB是逻辑“1”值时，通过将“1”加到截断的负值中来执行。 执行N位截断的装置包括增量器，二输入与门和N输入或门。
-
40.发明授权
公开(公告)号：US4516153A
公开(公告)日：1985-05-07
申请号：US480507
申请日：1983-03-30
摘要： In a color TV receiver, a composite video signal processing circuit serves to prepare the signal input to a CCD comb filter, and includes a transistor phase splitter with a first load resistor connected to the transistor's collector electrode and a second load resistor connected to the transistor's emitter electrode. A reactance of a first sign couples the collector electrode to an output terminal, while a reactance of the opposite sign couples the emitter electrode to the same output terminal. A capacitor between the transistor's collector and base electrodes provides a negative feedback path for signal components. Parameter values are selected to provide the processing circuit with a peak response at a frequency above the frequency band occupied by the composite video signals. Processing circuit provides a substantially constant group delay for signal frequencies throughout the band, while compensating for decline at high signal frequencies of IF amplifier's amplitude-versus-frequency characteristic.
摘要翻译： 在彩色TV接收机中，复合视频信号处理电路用于准备输入到CCD梳状滤波器的信号，并且包括具有连接到晶体管集电极的第一负载电阻的晶体管分相器和连接到晶体管的集电极的第二负载电阻 发射电极。 第一符号的电抗将集电极耦合到输出端，而相反符号的电抗将发射极耦合到相同的输出端。 晶体管集电极和基极之间的电容为信号分量提供了负反馈路径。 选择参数值以向处理电路提供在由复合视频信号占据的频带以上的频率处的峰值响应。 处理电路为整个频段的信号频率提供基本上恒定的群延迟，同时补偿IF放大器的幅度 - 频率特性的高信号频率下降。
-
-
-
-
-
-
-
-
-
搜索结果
42 条记录 (耗时 0.03 秒)
