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公开(公告)号：US5448308A
公开(公告)日：1995-09-05
申请号：US14157
申请日：1993-02-05
摘要： A video signal clamp involves evaluating the difference between the signal level and the desired clamp level during the back porch interval. A correction signal indicates whether the signal level must be increased or decreased to establish the desired clamp level. Generation of the correction signal involves a median filter algorithm. Any required increase or decrease of the signal level occurs continuously throughout each horizontal line interval.
摘要翻译： 视频信号钳位包括在后沿间隔期间评估信号电平与期望钳位电平之间的差值。 校正信号指示是否必须增加或减小信号电平以建立期望的钳位电平。 校正信号的产生涉及中值滤波算法。 任何所需的增加或减少信号电平都会在每个水平线间隔内持续发生。
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2.发明授权
公开(公告)号：US5420643A
公开(公告)日：1995-05-30
申请号：US250998
申请日：1994-05-31
IPC分类号： H04N3/223 , H04N3/27 , H04N5/45 , H04N7/00 , H04N7/01 , H04N9/64 , H04N5/262 , H04N5/272 , H04N9/74
CPC分类号： H04N7/0122 , H04N3/223 , H04N3/27 , H04N5/45 , H04N7/007 , H04N7/01 , H04N7/0105 , H04N9/641
摘要： A circuit for compressing and expanding video color component data comprises a FIFO line memory and a delay circuit. A timing circuit generates control signals for writing data into the line memory and for reading data from the line memory to compress and expand the data. The delay circuit matches the data compressed or expanded in the FIFO line memory to luminance data which is similarly compressed or expanded. A switching network selectively establishes a first signal path in which the line memory precedes the delay circuit for implementing the data expansion and a second signal path in which the delay circuit precedes the line memory for implementing the data compression. The switching network is controlled according to selected display formats requiring compression or expansion, for example by a microprocessor.
摘要翻译： 用于压缩和扩展视频颜色分量数据的电路包括FIFO行存储器和延迟电路。 定时电路产生用于将数据写入行存储器并用于从行存储器读取数据以压缩和扩展数据的控制信号。 延迟电路将FIFO行存储器中压缩或扩展的数据与类似地压缩或扩展的亮度数据进行匹配。 交换网络选择性地建立第一信号路径，其中线路存储器在延迟电路之前用于实现数据扩展，以及第二信号路径，其中延迟电路在线路存储器之前用于实现数据压缩。 根据所需的压缩或扩展的显示格式来控制交换网络，例如由微处理器。
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公开(公告)号：US4768083A
公开(公告)日：1988-08-30
申请号：US43770
申请日：1987-04-29
申请人： Eric D. Romesburg
发明人： Eric D. Romesburg
CPC分类号： H04N5/45
摘要： A television pix-in-pix system includes a pixel memory for storing one field of pixel intensity values of a television signal. A 1-bit overlay indication signal representative of pixel address locations defining a desired indicia on the TV screen is stored in an associated bit map memory. A digital multiplexor having input terminals coupled for respectively receiving the pixel intensity values and suitable overlay display values, and responsive to the overlay indication signal, provides the overlay display values when the overlay indication signal is a logical one, and provides the pixel intensity values otherwise, thereby generating the desired indicia as a part of the inset image on the TV screen.
摘要翻译： 电视像素插图系统包括用于存储电视信号的一个像素强度值场的像素存储器。 表示在TV屏幕上定义所需标记的像素地址位置的1位覆盖指示信号被存储在相关联的位图存储器中。 具有耦合用于分别接收像素强度值和合适覆盖显示值并且响应于覆盖指示信号的输入端的数字多路复用器在覆盖指示信号为逻辑1时提供覆盖显示值，否则提供像素强度值 ，从而在TV屏幕上产生作为插入图像的一部分的期望标记。
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公开(公告)号：US4772937A
公开(公告)日：1988-09-20
申请号：US032261
申请日：1987-03-31
申请人： Eric D. Romesburg
发明人： Eric D. Romesburg
CPC分类号： H04N9/64
摘要： A divider divides down the output of a high frequency oscillator to generate a master clock signal MCS for the purposes of sampling an incoming composite video signal CVS. A skew measuring circuit latches the current state of the divider at a predetermined edge of every incoming horizontal sync signal pulse IHSSP to provide skew data representative of the timing or phase offset between the clock signal MCS and the incoming horizontal sync signal IHSS at the start of each new line of picture information.
摘要翻译： 分频器将高频振荡器的输出除法，以产生主时钟信号MCS，以便对输入的复合视频信号CVS进行采样。 偏斜测量电路在每个进入的水平同步信号脉冲IHSSP的预定边缘处锁存分频器的当前状态，以提供表示时钟信号MCS和进入的水平同步信号IHSS之间的定时或相位偏移的偏差数据 每条新线图片信息。
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5.发明授权
公开(公告)号：US5966438A
公开(公告)日：1999-10-12
申请号：US611121
申请日：1996-03-05
申请人： Eric D. Romesburg
发明人： Eric D. Romesburg
CPC分类号： H04M9/08
摘要： An adaptive volume controlled radiotelephone system includes a microphone, a loudspeaker, a transceiver, and an adaptive volume control. The microphone generates an output electrical audio signal in response to sound, and the loudspeaker produces sound in response to an input electrical audio signal. The transceiver is responsive to the microphone and transmits radiotelephone communications to a remote party and receives radiotelephone communications from the remote party to generate the input electrical audio signal. The adaptive volume control is responsive to the output electrical audio signal and selects an amplitude of the sound produced by the loudspeaker so that the amplitude of the sound produced by the loudspeaker increases as the amplitude of the sound received at the microphone increases and decreases as the amplitude of the sound received at the microphone decreases.
摘要翻译： 自适应音量控制无线电话系统包括麦克风，扬声器，收发器和自适应音量控制。 麦克风响应于声音产生输出电音频信号，并且扬声器响应于输入的电音频信号产生声音。 收发器响应于麦克风，并向远程方发送无线电话通信，并从远程方接收无线电话通信，以生成输入电音频信号。 自适应音量控制响应于输出电音频信号，并且选择由扬声器产生的声音的幅度，使得扬声器产生的声音的幅度随着在麦克风接收的声音的幅度增加而降低，因为 在麦克风接收的声音的幅度减小。
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6.发明授权Data transfer from an external computer to a television receiver having picture-in-picture capability 失效从外部计算机到具有画中画能力的电视接收机的数据传输
公开(公告)号：US5113259A
公开(公告)日：1992-05-12
申请号：US511269
申请日：1990-04-19
申请人： Eric D. Romesburg , Kenneth W. Maze , David J. Duffield , Michael S. Deiss , Billy W. Beyers, Jr. , Kevin E. Bridgewater
发明人： Eric D. Romesburg , Kenneth W. Maze , David J. Duffield , Michael S. Deiss , Billy W. Beyers, Jr. , Kevin E. Bridgewater
CPC分类号： H04N5/45
摘要： The digitized video image data stored in a video RAM in a pix-in-pix television receiver is modified by the addition of digital data from an external computer via a computer interface circuit under control of the pix-in-pix controller. The computer interface circuit is coupled to the internal controller of the television receiver via an external input terminal. The additional digital data received from the external computer may be representative of either text or graphics to be merged into the stored video image.
摘要翻译： 通过在pix-in-pix控制器的控制下经由计算机接口电路从外部计算机添加数字数据来修改存储在pix-in-pix电视接收机中的视频RAM中的数字化视频图像数据。 计算机接口电路通过外部输入端子耦合到电视接收机的内部控制器。 从外部计算机接收的附加数字数据可以代表要合并到存储的视频图像中的文本或图形。
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公开(公告)号：US4864399A
公开(公告)日：1989-09-05
申请号：US032258
申请日：1987-03-31
IPC分类号： H04N9/64
CPC分类号： H04N9/64
摘要： A digital TV receiver includes an apparatus for generating a skew corrected clock. The apparatus consists of a fixed frequency, free running oscillator for producing a signal having a frequency which is a fixed integer multiple K of the desired nominal frequency of the skew-corrected clock signal, and a divide-by-K circuit which is reset once every horizontal line. In accordance with another aspect of this invention, the state of the divide-by-K circuit is captured and saved for use in a chroma demodulation apparatus just before it is reset.
摘要翻译： 数字电视接收机包括用于产生偏斜校正时钟的装置。 该装置包括一个固定频率的自由运行的振荡器，用于产生频率为偏斜校正时钟信号的期望标称频率的固定整数倍K的信号，以及一个被除以K分频电路 每条水平线。 根据本发明的另一方面，除了K电路的状态被捕获并保存以在复位之前在色度解调装置中使用。
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公开(公告)号：US4736237A
公开(公告)日：1988-04-05
申请号：US32829
申请日：1987-03-31
摘要： An apparatus is disclosed for generating a burst-locked, color subcarrier representative signal .phi..sub.sc from a skew-corrected clock signal MCS (which is reset once every horizontal line) and a skew error signal SES (indicative of the once-a-line phase adjustment of the skew-corrected clock signal). In accordance with another feature of the invention, a chroma demodulation apparatus is provided for generating a pair of color difference signals R-Y and B-Y in response to the internally-generated .phi..sub.sc signal.
摘要翻译： 公开了一种用于从偏斜校正的时钟信号MCS（每水平行一次复位）产生突发锁定彩色副载波代表信号phi的装置和偏斜误差信号SES（指示一次一相位 偏差校正时钟信号的调整）。 根据本发明的另一个特征，提供一种色度解调装置，用于响应于内部产生的phi信号产生一对色差信号R-Y和B-Y。
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