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1.发明授权Hardware reduction by truncation of selected number of most significant bits for digital video system using subsampling and adaptive reconstruction 失效通过使用子采样和自适应重建来截断数字视频系统的选定数目的最高有效位的硬件减少
公开(公告)号：US4340940A
公开(公告)日：1982-07-20
申请号：US181425
申请日：1980-08-26
CPC分类号： H04N19/00 , H04N19/587 , H04N19/59
摘要： In order to reduce the amount of hardware required in comparing 8-bit numbers representing digitized video signals, only the four LSB are compared, since if the numbers differ by more than the four LSB, no comparison is desired. This is done by detecting if any of the four MSB are logic "1", and if so, setting all of the four LSB to logic "1".
摘要翻译： 为了减少比较代表数字化视频信号的8位数所需的硬件数量，只比较4个LSB，因为如果数字差别大于4个LSB，则不需要比较。 这通过检测四个MSB中的任何一个是逻辑“1”来完成，如果是，则将所有四个LSB设置为逻辑“1”。
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公开(公告)号：US4320416A
公开(公告)日：1982-03-16
申请号：US197290
申请日：1980-10-15
CPC分类号： H04N19/59 , H04N11/042
摘要： An encoder for digital video signals uses averages of pairs of transmitted samples to reconstruct untransmitted samples. The pair selected for reconstruction is selected in accordance with the criteria of least change around the untransmitted sample. If a plurality of averages are tied for least change, a priority order is used to select which average to use. For color video the priority order is preferably the horizontal, diagonal and vertical averages. A different order can be used for monochrome signals.
摘要翻译： 用于数字视频信号的编码器使用传输样本对的平均值来重建未发送的采样。 根据关于未发送样本的最小变化的标准来选择用于重建的对。 如果将多个平均值绑定到最小变化，则使用优先级顺序来选择要使用的平均值。 对于彩色视频，优先顺序优选为水平，对角线和垂直平均值。 单色信号可以使用不同的顺序。
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公开(公告)号：US4376948A
公开(公告)日：1983-03-15
申请号：US228596
申请日：1981-01-26
CPC分类号： H04N11/042
摘要： A TDM scheme has a Y signal that is sampled at 14.32 MHz and every other sample is discarded. The discarded samples are 180.degree. out-of-phase from line-to-line. I and Q signals are sampled at one half this frequency and every other sample is discarded also 180.degree. out-of-phase from line-to-line on a given line. The discarded samples of Q and I are 180.degree. out-of-phase with respect to each other. This allows insertion of the retained I and Q samples into the retained Y samples to allow multiplexing.
摘要翻译： TDM方案具有在14.32MHz采样的Y信号，并且丢弃每隔一个样本。 丢弃的样品从线到线是180°异相。 I和Q信号在该频率的一半被采样，并且每一个其他样本也被丢弃，在给定行上也从线到谱舍弃180度的异相。 丢弃的Q和I的样品相对于彼此是180°异相。 这允许将保留的I和Q样本插入到保留的Y样本中以允许复用。
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公开(公告)号：US4507676A
公开(公告)日：1985-03-26
申请号：US437263
申请日：1982-10-28
摘要： A matrix for digital video signals separates each coefficient into a binary part and a remainder. The binary part can be implemented very simply by a hardwired right shift. The remainder can be implemented using a ROM. Less ROM memory space is required than for implementing the entire coefficient in a ROM.
摘要翻译： 用于数字视频信号的矩阵将每个系数分成二进制部分和余数。 二进制部分可以非常简单地通过硬连线右移来实现。 其余的可以使用ROM来实现。 需要较少的ROM存储空间，而不是在ROM中实现整个系数。
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公开(公告)号：US4684977A
公开(公告)日：1987-08-04
申请号：US759832
申请日：1985-07-29
IPC分类号： H04N9/78
CPC分类号： H04N9/78
摘要： A frame comb type composite video decoder which does not require motion adaptive processing circuitry generates low frequency luminance signal components from one field of composite video signal. The high frequency luminance component is derived from two lines of composite video signal from each of two fields disposed before and after the field from which the low frequency luminance signals is developed.
摘要翻译： 不需要运动自适应处理电路的帧梳型复合视频解码器从复合视频信号的一个场产生低频亮度信号分量。 高频亮度分量是从两行的两个场中得出的，这两行是在低频亮度信号从其开始的场之前和之后设置的。
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公开(公告)号：US4587564A
公开(公告)日：1986-05-06
申请号：US590981
申请日：1984-03-19
申请人： Robert A. Dischert
发明人： Robert A. Dischert
CPC分类号： G11B31/006 , H04N5/2173 , H04N5/772
摘要： A television camera-recorder combination includes an imager which forms a signal representative of the image during an integration interval. The integration interval is followed by a pull-down interval during which the integrated signal is transferred out of the photoresponsive region. Streaking of an image displayed from the signal results from light falling on the photoresponsive region during the pull-down interval. A mechanical shutter periodically prevents light from falling upon the photoresponsive region of the imager. The shutter is synchronized with the pull-down interval. The synchronization and drive arrangement of the video recorder portion is mechanically coupled to the shutter to provide a common drive. In another embodiment, a color wheel associated with the viewfinder of the camera is mechanically coupled to the video recorder drive arrangement for common mechanical drive.
摘要翻译： 电视摄像机组合包括在积分间隔期间形成表示图像的信号的成像器。 积分间隔后跟一个下拉间隔，在此间隔期间，积分信号被传送出光响应区域。 在下拉间隔期间，从信号显示的图像的延展由光落在光响应区上的光产生。 机械快门定期地防止光线落在成像器的光响应区域上。 快门与下拉间隔同步。 视频记录器部分的同步和驱动装置机械地联接到快门以提供公共的驱动。 在另一个实施例中，与摄像机的取景器相关联的色轮机械地耦合到视频记录器驱动装置用于共同的机械驱动。
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公开(公告)号：US4580173A
公开(公告)日：1986-04-01
申请号：US322172
申请日：1981-11-17
CPC分类号： H04N9/82
摘要： An improved transmission arrangement for a color television signal includes a time-division multiplexing apparatus for alternately presenting for transmission through a single channel baseband signals defining the chrominance information of the television signal. In order to provide improved resolution, a store is coupled to the signal source for storing at a writing rate a first of the baseband components during the time at which it is generated. A read generator is coupled to the store for reading the stored baseband component at a higher data rate than that at which it was generated. The baseband component is transmitted through the single channel at the higher data rate.
摘要翻译： 用于彩色电视信号的改进的传输装置包括时分复用装置，用于通过定义电视信号的色度信息的单个信道基带信号交替呈现传输。 为了提供改进的分辨率，存储器耦合到信号源，以便在其产生时间期间以写入速率存储第一基带分量。 读取发生器被耦合到存储器，以比其生成的数据速率更高的数据速率读取存储的基带分量。 基带分量通过单个信道以更高的数据速率传输。
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公开(公告)号：US4550337A
公开(公告)日：1985-10-29
申请号：US482821
申请日：1983-04-07
摘要： A video signal is serially enclosed for transmission in PCM form during synchronizing level intervals and encoded in a run length limited NRZ form during non-synchronizing level intervals, each PCM word being selected from minimum and maximum disallowed states of the NRZ code. In a decoder, a first detector responds only to the presence of the PCM code for synchronizing a second detector with response to both the NRZ and PCM coded portions of the encoded video signal to provide a decoded video output signal whereby the PCM portion of the signal conveys both decoder timing information and information as to a specific level of the video signal.
摘要翻译： 视频信号被串行封闭，以在同步电平间隔期间以PCM形式传输，并且在非同步电平间隔期间以游程长度限制NRZ形式编码，每个PCM字从NRZ码的最小和最大不允许状态中选择。 在解码器中，第一检测器仅响应PCM代码的存在，以使第二检测器与编码视频信号的NRZ和PCM编码部分的响应同步，以提供解码的视频输出信号，由此信号的PCM部分 传送解码器定时信息和关于视频信号的特定级别的信息。
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公开(公告)号：US4419687A
公开(公告)日：1983-12-06
申请号：US276958
申请日：1981-06-24
摘要： A sampled color video signal is recorded in component form in a plurality of channels. The form of the signal is chosen so that if only one channel is available due to dropouts upon playback, then at least approximate separation into color components is possible, and if all channels are available, then full color separation is possible. The form is also chosen to provide a dynamic range that fits the transmission channel.
摘要翻译： 采样的彩色视频信号以分量形式记录在多个通道中。 选择信号的形式，使得如果由于回放时的退出而仅有一个通道可用，则至少近似分离成颜色分量是可能的，并且如果所有通道都可用，则全色分离是可能的。 该形式还被选择为提供适合传输信道的动态范围。
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10.发明授权
公开(公告)号：US4352122A
公开(公告)日：1982-09-28
申请号：US239613
申请日：1981-03-02
CPC分类号： H04N9/641
摘要： An apparatus for providing component-to-composite and vice versa transcodings of a sampled video signal features generating steering bits that indicate which of combinations of surrounding samples of a composite signal has a component that provides the closest match to the corresponding component of an original component video signal. This allows successive transcodings with a minimum of crosstalk between components, e.g., luminance and chrominance.
摘要翻译： 一种用于提供采样视频信号的组件到复合和反向代码转换的装置，其特征在于产生转向位，其指示复合信号的周围采样的哪些组合具有提供与原始分量的对应分量最接近的匹配的分量 视频信号。 这允许在组件之间具有最小串扰的连续转码，例如亮度和色度。
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