-
公开(公告)号：US4494146A
公开(公告)日：1985-01-15
申请号：US515851
申请日：1983-07-21
CPC分类号： H04N5/148
摘要： A kinescope driver amplifier comprises a resistive feedback network coupled from the output to the input of the amplifier. The feedback network includes first and second series resistor of mutually different values. The larger value resistor is connected to amplifier output, and the smaller value resistor is connected to the amplifier input.
摘要翻译： 显像管驱动器放大器包括从输出端耦合到放大器的输入的电阻反馈网络。 反馈网络包括互不相同值的第一和第二串联电阻。 较大的值电阻连接到放大器输出，较小的值电阻连接到放大器输入。
-
22.发明授权Combined phase shift filter network in a color video signal processing system employing dynamic flesh tone control 失效在彩色视频信号处理系统中采用动态肤色控制的组合相移滤波器网络
公开(公告)号：US4207590A
公开(公告)日：1980-06-10
申请号：US20337
申请日：1979-03-14
CPC分类号： H04N9/643
摘要： A combined phase shift and bandpass filter circuit in a color television receiver including color signal demodulators, and an automatic flesh tone correction network which provides a reference signal for the color demodulators, is disclosed. The circuit comprises an integral bandpass filter and phase shift network coupled between the output of the flesh tone correction network and the reference signal inputs of the demodulators. The circuit filters unwanted frequency components of the reference signal from the flesh correction network, and provides phase shifting of the reference signal as appropriate for proper operation of the demodulators. The circuit exhibits good phase stability, does not require alignment from receiver to receiver, and requires a minimum of connecting terminals to the flesh correction network and color demodulators.
摘要翻译： 公开了一种包括彩色信号解调器的彩色电视接收机中的组合相移和带通滤波器电路以及为彩色解调器提供参考信号的自动肤色校正网络。 电路包括一个整合的带通滤波器和相移网络，它耦合在脏音校正网络的输出端和解调器的参考信号输入端之间。 该电路滤除来自肉体校正网络的参考信号的不需要的频率分量，并且适当地提供参考信号的相移以用于解调器的正确操作。 该电路具有良好的相位稳定性，不需要从接收器到接收器的对准，并且需要最少的连接端子到肉体校正网络和颜色解调器。
-
23.发明授权Method and apparatus for providing a variety of information from an information server 失效用于从信息服务器提供各种信息的方法和装置
公开(公告)号：US6130720A
公开(公告)日：2000-10-10
申请号：US797922
申请日：1997-02-10
IPC分类号： G06F13/00 , H04N7/08 , H04N7/088 , H04N7/10 , H04N7/173 , H04N17/00 , H04N21/426 , H04N21/435 , H04N21/488 , H04N21/61 , H04N21/81 , H04N7/00 , H04N5/445 , H04N11/00
CPC分类号： H04N21/42653 , H04N21/4355 , H04N21/4884 , H04N21/6137 , H04N21/8126 , H04N7/08 , H04N7/0884 , H04N7/10 , H04N7/17318
摘要： A method and apparatus for requesting, receiving, processing, and providing local information from a single local source to a television viewer. A local information provider is accessed via a communications link and specific data, which is separate and distinct from video signals received by the television receiver, is downloaded to the television receiver. The data provided by the local source is minimally formatted without any graphical overhead. Requests for information from the local source may be on demand or at a predetermined time.
摘要翻译： 一种用于从单个本地源向电视观众请求，接收，处理和提供本地信息的方法和装置。 通过通信链路访问本地信息提供者，并将与电视接收机接收的视频信号分开且不同的特定数据下载到电视接收机。 由本地源提供的数据是最小的格式，没有任何图形开销。 来自当地来源的信息的请求可以是按需或在预定时间。
-
24.发明授权System and method for updating a system time constant (STC) counter following a discontinuity in an MPEG-2 transport data stream 失效用于在MPEG-2传输数据流中的不连续性之后更新系统时间常数（STC）计数器的系统和方法
公开(公告)号：US5818539A
公开(公告)日：1998-10-06
申请号：US626184
申请日：1996-03-29
CPC分类号： H04N21/4305 , H04N19/423 , H04N19/61 , H04N21/434 , H04N7/52
摘要： A transport decoder 110, for receiving and processing a transport data stream using MPEG-2 formats, includes connections to a physical layer channel interface (channel interface) 112, a buffer memory 114, a host microprocessor 116, audio and video decoders 118/120, and clock signal circuitry 122. Upon receipt of a discontinuity indicator, the transport packet headers are parsed and transport packet payloads are stored in memory. Subsequently, upon receipt of a next program counter reference (PCR) value, a counter is loaded with the received program counter reference value. Next, the data stored in memory is searched for a time stamp and, when one is found, the time stamp is retrieved. Finally, a timer interrupt is set for a point in time approximately one frame time before the time stamp value, and, when the timer interrupt occurs, the program counter reference value is sent to the decoders, thereby providing sufficient time for the decoders to process data.
摘要翻译： 用于使用MPEG-2格式接收和处理传输数据流的传输解码器110包括到物理层信道接口（信道接口）112，缓冲存储器114，主微处理器116，音频和视频解码器118/120 和时钟信号电路122.在接收到不连续指示符时，分析传输分组报头，并将传输分组有效载荷存储在存储器中。 随后，在接收到下一个程序计数器参考（PCR）值时，计数器加载接收到的程序计数器参考值。 接下来，搜索存储在存储器中的数据的时间戳，并且当找到一个时间戳时，检索时间戳。 最后，在时间标记值之前大约一帧时间的时间点设置定时器中断，并且当定时器中断发生时，将程序计数器参考值发送到解码器，从而为解码器提供足够的时间来处理 数据。
-
25.发明授权
公开(公告)号：US5619337A
公开(公告)日：1997-04-08
申请号：US380262
申请日：1995-01-27
IPC分类号： G11B20/12 , H04N7/52 , H04N7/56 , H04N9/804 , H04N21/234 , H04N21/2365 , H04N21/4147 , H04N21/43 , H04N21/432 , H04N21/433 , H04N21/4385 , H04N21/482 , H04N5/76 , G11B5/02 , G11B5/09 , G11C15/18
CPC分类号： H04N21/23406 , G11B20/1201 , H04N21/23655 , H04N21/4147 , H04N21/4305 , H04N21/4325 , H04N21/4334 , H04N21/4385 , H04N7/52 , H04N7/56 , H04N9/8042 , H04N21/482
摘要： A system records a single program from a multi-program transport stream that is encoded according to the MPEG-2 standard. The system demultiplexes transport packets from the multi-program transport stream and records the demultiplexed packets on a digital video cassette recorder (DVCR). The system includes circuitry in the encoder which emulates a buffer in the digital recorder that is used to hold the packets to convert the bursty packet data into constant rate data for recording. This emulated buffer controls the overall rate at which packets of the selected program are inserted into the multi-program transport stream by the encoder. As each packet is recorded, a time stamp value, representing when the packet was demultiplexed and a clock count value, representing a number of pulses of a high-frequency system clock signal that occurred during a predetermined number of bytes of the demultiplexed packet are recorded with the demultiplexed packet. These values are used to regenerate timing signals for a single program transport stream when the recorded packet data is replayed from the tape.
摘要翻译： 系统从根据MPEG-2标准编码的多节目传输流记录单个节目。 该系统从多节目传输流中解复用传输分组，并将解复用的分组记录在数字录像机（DVCR）上。 该系统包括编码器中的电路，其仿真数字记录器中用于保持分组以将突发分组数据转换为恒定速率数据以用于记录的缓冲器。 该仿真缓冲器控制编码器将所选程序的分组插入到多程序传输流中的总速率。 当记录每个分组时，记录表示分组分解时间的时间戳值和表示在解复用的分组的预定字节数期间发生的高频系统时钟信号的脉冲数的时钟计数值 与解复用的数据包。 当记录的数据包从磁带重放时，这些值用于重新生成单个节目传输流的定时信号。
-
26.发明授权Method and apparatus for improving temporal video signal processing using motion vectors transmitted with the video signal 失效用于利用与视频信号一起发送的运动矢量改进时间视频信号处理的方法和装置
公开(公告)号：US5430487A
公开(公告)日：1995-07-04
申请号：US954508
申请日：1992-09-30
IPC分类号： H04N7/32 , G06T9/00 , H04N5/14 , H04N5/21 , H04N5/44 , H04N7/08 , H04N7/081 , H04N7/26 , H04N11/02 , H04N11/14 , H04N21/2383 , H04N21/438 , H04N11/06
CPC分类号： H04N11/14 , H04N11/02 , H04N19/80 , H04N21/2383 , H04N21/4382 , H04N5/144 , H04N5/211 , H04N7/08 , H04N7/081 , H04N5/44
摘要： A system for improving motion-sensitive processing in a television receiver generates motion vectors for video images in a studio environment, encodes the motion vectors and then combines the encoded motion vectors with the video signal for transmission. A receiver decodes the motion vectors and applies them to the motion-sensitive processing apparatus to improve its performance. The motion vector information is encoded during the active portion of the video signal in a manner that does not produce significant distortion when the video signal is processed for display. According to one embodiment of the invention, the motion vectors are encoded in a band of frequencies surrounding the color subcarrier signal as a 16 quadrature amplitude modulated (QAM) signal using Fukinuki-type modulation. According to another embodiment of the invention the motion vectors are encoded using conventional 16 QAM modulation and then used to modulate a carrier signal which is quadrature phase related to the picture carrier signal.
摘要翻译： 用于改善电视接收机中的运动敏感处理的系统在演播室环境中生成用于视频图像的运动矢量，对运动矢量进行编码，然后将编码运动矢量与视频信号组合以进行传输。 接收机解码运动矢量并将其应用于运动敏感处理装置以提高其性能。 运动矢量信息在视频信号的有效部分被编码，当视频信号被处理以进行显示时，不会产生显着的失真。 根据本发明的一个实施例，使用Fukinuki型调制，将运动矢量以围绕彩色副载波信号的频带编码为16正交调幅（QAM）信号。 根据本发明的另一个实施例，使用传统的16QAM调制对运动矢量进行编码，然后用于调制与图像载波信号有关的正交相位的载波信号。
-
27.发明授权Motion compensation using minimum bits per motion block as criterion for block matching 失效运动补偿使用运动块最小位作为块匹配标准
公开(公告)号：US5418617A
公开(公告)日：1995-05-23
申请号：US742398
申请日：1991-08-08
CPC分类号： H04N19/567 , H04N19/51 , H04N19/61
摘要： Apparatus for selecting a block of data in a previous frame to be used as a predicted block for a given block in a current frame in a system that reduces the bit rate by codifying the difference between the predicted block and the given block in a given manner by deriving the differences between the given block in the current frame and a plurality of blocks in the previous frame and selecting as the predicted block that block for which the codification of its differences with the given block requires the least number of bits. The apparatus can also select a predicted block from a number of blocks selected in accordance with ABD or SBD techniques.
摘要翻译： 用于选择要用作系统中当前帧中的给定块的预测块的先前帧中的数据块的装置，其通过以给定方式编码预测块和给定块之间的差异来降低比特率 通过导出当前帧中的给定块与前一帧中的多个块之间的差异，并选择作为其与给定块的差异的编码所需的最少位数的块的预测块。 该装置还可以从根据ABD或SBD技术选择的多个块中选择预测块。
-
公开(公告)号：US4845547A
公开(公告)日：1989-07-04
申请号：US173955
申请日：1988-03-28
CPC分类号： H04N9/78
摘要： A comb filter for separating chrominance and luminance signals for each sample of a video signal adaptively selects exactly one line above or one line below for processing with the sample of interest. In the process, luminance and chrominance signals are obtained for both processing modes and coupled to a switch. Selection logic utilizes the chrominance signals established for each mode to sequentially check vertical correlation of the video signal, chrominance variations, and vertical detail to position the switch to choose the proper luminance and chrominance signal pair.
-
29.发明授权Method and apparatus for reducing analog/digital converter requirements in picture-in-picture television circuits 失效用于减少画中画电视电路中模拟/数字转换器要求的方法和装置
公开(公告)号：US4827343A
公开(公告)日：1989-05-02
申请号：US104325
申请日：1987-10-02
CPC分类号： H04N5/45
摘要： In the PIP circuit of a television receiver, the resolution of the analog-to-digital converter is improved by one bit. This is done by adding a dither signal, having an amplitude equal to one-half the least significant bit at the converter output to the analog input signal throughout specific lines of the input signal. If the converter output signal is filtered by a piecewise recursive filter, in which every third line is a valid line, the other two being discarded in the subsequent PIP processor, then the dither signal is applied during the valid line and the line two lines removed from the valid line, i.e. the line following the previous valid line. If the filter is a FIR filter then the dither signal is applied during alternate lines.
摘要翻译： 在电视接收机的PIP电路中，模数转换器的分辨率提高了一位。 这通过在输入信号的特定线路上添加具有等于转换器输出端的最低有效位的二分之一的抖动信号到模拟输入信号。 如果转换器输出信号被分段递归滤波器滤波，其中每第三行是有效行，则另外两个在后续PIP处理器中被丢弃，则在有效行期间施加抖动信号，并且将第二行移除 从有效行，即跟随上一行有效行的行。 如果滤波器是FIR滤波器，则在交替行期间应用抖动信号。
-
公开(公告)号：US4665439A
公开(公告)日：1987-05-12
申请号：US871014
申请日：1986-06-05
CPC分类号： H04N5/45
摘要： Only every third line is utilized for the picture-in-picture feature. Each third line is a function of weighted contributions from the present line and the two previous lines. The third lines are weighted by a factor 1-2a, while the remaining two lines will each be weighted by a factor a. The circuit for implementing this equation consists of a first and second multiplier multiplying each of the incoming filter signals by a and 1-2a, respectively. Throughout the middle line, the (1-2a) multiplied input is applied to one input of a summing circuit, while for the remaining lines the same summing circuit input is applied to the terminal furnishing the input signal multiplied by a. The second summing input receives a "0" during the lines following the valid line, and the output of a delay unit during the remaining two lines. The input to the delay unit is connected to the summing circuit output. The desired output signals, properly weighted, are available every third line at the summing circuit output.
摘要翻译： 只有第三行才能用于画中画功能。 每个第三行是来自当前行和前两行的加权贡献的函数。 第三行由因子1-2a加权，而剩余的两行将由每个因子a加权。 用于实现该方程的电路由分别将每个输入滤波器信号乘以a和1-2a的第一和第二乘法器组成。 在整个中间线，（1-2a）相乘的输入被施加到求和电路的一个输入，而对于剩余的线，相同的求和电路输入被施加到终端，将输入信号乘以a。 第二个求和输入在有效行之后的行中接收“0”，在剩下的两行中输出延迟单元。 延迟单元的输入连接到求和电路输出。 正确加权的期望输出信号可在求和电路输出端每三行可用。
-
-
-
-
-
-
-
-
-
搜索结果
42 条记录 (耗时 0.021 秒)
