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1.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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公开(公告)号：US4334237A
公开(公告)日：1982-06-08
申请号：US149998
申请日：1980-05-15
CPC分类号： H04N11/042 , H04B14/046 , H04N19/00
摘要： An apparatus reduces quantizing noise by averaging picture information when only low frequency information is present. Thus, high frequency detail is not lost. This is determined by looking at proximate samples to see if their amplitudes are within a selected amount of each other. The averaging typically is of two or four picture samples depending upon how great an area has only low frequencies, but greater numbers of samples can be used.
摘要翻译： 当仅存在低频信息时，设备通过平均图像信息来减少量化噪声。 因此，高频细节不会丢失。 这是通过查看近似样本来确定它们的振幅是否在彼此的选定量之内。 平均值通常为两个或四个图像样本，取决于区域仅具有多少频率，但是可以使用更多数量的样本。
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公开(公告)号：US4396937A
公开(公告)日：1983-08-02
申请号：US284786
申请日：1981-07-20
CPC分类号： H04N11/048
摘要： A multichannel sampled system uses a single set of steering bits to reconstruct deleted samples from all channels. The steering bits can be derived from the channel having the greatest bandwidth or amplitude, or by majority voting logic operating on steering bits from all channels.
摘要翻译： 多通道采样系统使用单组转向位来从所有通道重建已删除的样本。 转向位可以从具有最大带宽或幅度的通道或通过从所有通道的转向位上操作的多数投票逻辑导出。
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4.发明授权Data rate reduction for digital video signals by subsampling and adaptive reconstruction 失效通过子采样和自适应重建，数字视频信号的数据速率降低
公开(公告)号：US4323916A
公开(公告)日：1982-04-06
申请号：US168077
申请日：1980-07-14
CPC分类号： H04N19/00 , H04N19/587 , H04N19/59
摘要： A digital TV system reduces the data rate by transmitting or recording only bytes representing half of the sampled pixels. Steering bits are also transmitted that tell which of the transmitted bytes are the closest match to the untransmitted bytes so the pixels represented by the later can be reconstructed.
摘要翻译： 数字电视系统通过传输或记录仅代表采样像素的一半的字节来降低数据速率。 还传送转向位，其指示哪个发送的字节与未发送的字节最接近，因此可以重建由稍后表示的像素。
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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：US4388638A
公开(公告)日：1983-06-14
申请号：US226387
申请日：1981-01-19
CPC分类号： H04N9/64
摘要： In a standard NTSC composite video signal, the peak excursion of the luminance plus chrominance signal for certain saturated colors exceeds the peak excursion of the white-representative luminance alone. When digitized, the signal is subject to quantizing noise. The effective spectial distribution of the quantizing noise is improved by reducing the amplitude of the chrominance signal so that the peak excursion of luminance plus chrominance for saturated colors does not substantially exceed the peak amplitude of white-representative luminance.
摘要翻译： 在标准NTSC复合视频信号中，对于某些饱和色，亮度加上色度信号的峰值偏移仅超过白色代表亮度的峰值偏移。 当数字化时，信号会受到量化噪声的影响。 通过降低色度信号的幅度来提高量化噪声的有效光谱分布，使得饱和色度的亮度和色度的峰值偏移基本上不超过白色代表亮度的峰值振幅。
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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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