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    • 3. 发明授权
    • Apparatus for formatting a packetized digital datastream suitable for
conveying television information
    • 用于格式化适于传送电视信息的打包数字数据流的装置
    • US5831690A
    • 1998-11-03
    • US750441
    • 1996-12-06
    • Paul Wallace LyonsAlfonse Anthony Acampora
    • Paul Wallace LyonsAlfonse Anthony Acampora
    • G06T9/00H04N7/66H04N21/2389H04N21/242H04N21/43H04N21/4385H04N7/04H04N7/12
    • G06T9/007H04N21/2389H04N21/242H04N21/4305H04N21/4385
    • A transmission processor (16) receives an input packetized datastream (FIGS. 6-9; FIGS. 15-18 signal A) containing packets of data bytes including MPEG coded video information. The transmission processor outputs a symbol datastream (FIGS. 15-18 signal F) representing a sequence of data fields (FIG. 1) comprising groups of data segments (X) with an associated field sync segment. The transmission processor inserts overhead information. e.g., FEC error coding information, into each data segment, and inserts the longer duration field sync overhead segment between groups of data field segments. The frequency of the transmission processor input byte clock (SC/2, FIG. 6; FIG. 15) an integer sub-multiple of an output symbol clock (SC) frequency. The input datastream exhibits constant uniform inter-packet data gaps and a constant uniform data rate, thereby facilitating the seamless insertion of the field sync overhead segment into the datastream without interrupting the datastream. Similar but inverse processing occurs at a receiver.
    • 发送处理器(16)接收包含包含MPEG编码视频信息的数据字节分组的输入分组化数据流(图6-9;图15-18信号A)。 传输处理器输出表示包括具有相关联的字段同步段的数据段(X)组的数据字段序列(图1)的符号数据流(图15-18信号F)。 传输处理器插入开销信息。 例如FEC错误编码信息,并且在数据字段段的组之间插入较长持续时间的字段同步开销段。 传输处理器输入字节时钟(SC / 2,图6;图15)的频率是输出符号时钟(SC)频率的整数子倍。 输入数据流表现出恒定均匀的分组间数据间隙和恒定的均匀数据速率,从而有助于将场同步开销段无缝地插入到数据流中而不中断数据流。 在接收器处发生类似但是相反的处理。
    • 4. 发明授权
    • Inner raster distortion correction circuit
    • 内光栅失真校正电路
    • US5661375A
    • 1997-08-26
    • US366417
    • 1994-12-29
    • Peter Eduard Haferl
    • Peter Eduard Haferl
    • H04N3/23H04N3/233G09G1/04
    • H04N3/233
    • A modulation circuit (Q.sub.1) supplies a correction current (i.sub.2) to an S-shaping capacitor (C.sub.23) to modulate the voltage across a deflection winding (L.sub.H) for correction of inner raster distortion. The frequency of the correction current is lower than line frequency for the correction of inner pincushion or barrel distortion. For correction of second order inner pincushion or barrel distortion, the frequency is higher than line frequency. The direction of the correction current in the S-capacitor can be made the same or opposite to the deflection current, resulting in an additive or a subtractive correction. The amount of the inner correction is adjustable independent of the outside raster correction. The modulation circuit is driven by deflection energy and is independent of the flyback transformer (T.sub.20).
    • 调制电路(Q1)将校正电流(i2)提供给S整形电容器(C23),以调制偏转绕组(LH)两端的电压,以校正内部光栅失真。 校正电流的频率低于校正内枕形或桶形失真的线频率。 对于二阶内枕形或桶形失真的校正,频率高于线路频率。 S电容器中的校正电流的方向可以与偏转电流相同或相反,从而产生加法或减法校正。 内部校正量可独立于外部光栅校正而调整。 调制电路由偏转能量驱动,与反激式变压器(T20)无关。
    • 5. 发明授权
    • Bidirectional deflection and display systems
    • 双向偏转和显示系统
    • US5652482A
    • 1997-07-29
    • US714034
    • 1996-09-12
    • Luc Tripod
    • Luc Tripod
    • H04N3/16G09G1/04H04N3/30H01J29/56
    • H04N3/30G09G1/04
    • A symmetrical square wave, having zero average value, is coupled to the input of a horizontal deflection yoke through an S-shaping capacitance. A negative resistance coupled to the output of the yoke has a negative resistance value which compensates for resistive losses in the yoke. A yoke current generated in the yoke will be a symmetrical triangular waveform. A first control loop adjusts the negative resistance value to assure successive zero value crossings of the yoke current are coincident in time with each center of successive horizontal scan lines. A second control loop adjusts the square wave to assure successive level transitions of the square wave are coincident in time with successive changes of scanning direction.
    • 具有零平均值的对称方波通过S整形电容耦合到水平偏转线圈的输入端。 耦合到磁轭的输出的负电阻具有补偿磁轭中的电阻损耗的负电阻值。 在轭中产生的轭电流将是对称的三角波形。 第一控制回路调节负电阻值,以确保轭电流的连续零值交叉与时间上的连续水平扫描线的每个中心重合。 第二个控制环路调整方波,以确保方波的连续电平转换在时间上与扫描方向的连续变化一致。
    • 7. 发明授权
    • Vertical panning for interlaced video
    • 垂直平移视频隔行扫描
    • US5574508A
    • 1996-11-12
    • US333181
    • 1994-11-02
    • Robert K. Diamant
    • Robert K. Diamant
    • H04N9/00H04N3/22H04N3/227H04N5/44H04N5/04
    • H04N7/0122H04N3/22
    • A vertical panning system comprises: a source of respective signals having a vertical synchronizing frequency, a horizontal synchronizing frequency and a multiple of the horizontal synchronizing frequency; a video display having an interlaced field mode of operation; a horizontal display control circuit coupled to the video display and responsive to the supplied horizontal synchronizing frequency signal; a digital phase delay circuit, responsive to the supplied multiple horizontal synchronizing frequency signal, the supplied vertical synchronizing frequency signal and to a panning control signal, having as an output a second vertical synchronizing frequency signal delayed in phase relative to the supplied vertical synchronizing frequency signal by any one of a plurality of delays differing in increments corresponding in duration to horizontal half line intervals; and, a vertical display control circuit coupled to the video display and responsive to the second vertical synchronizing frequency signal.
    • 垂直平移系统包括:具有垂直同步频率,水平同步频率和水平同步频率的倍数的各个信号源; 具有交错场操作模式的视频显示器; 水平显示控制电路,其耦合到所述视频显示器并响应于所提供的水平同步频率信号; 数字相位延迟电路,响应于所提供的多个水平同步频率信号,所提供的垂直同步频率信号和摇摄控制信号,具有相对于所提供的垂直同步频率信号相位延迟的第二垂直同步频率信号作为输出 通过在持续时间对应于水平半行间隔的增量不同的多个延迟中的任何一个; 以及耦合到视频显示器并响应于第二垂直同步频率信号的垂直显示控制电路。
    • 10. 发明授权
    • Kinescope driver apparatus with contrast enhancement
    • 显像管驱动器具有对比度增强
    • US5317240A
    • 1994-05-31
    • US906313
    • 1992-06-29
    • Anton W. Keller
    • Anton W. Keller
    • H04N9/69H01J29/52
    • H04N9/69
    • A high voltage, inverting, kinescope driver amplifier is coupled at the input thereof to a source of low voltage video input signals to be amplified and is coupled at the output thereof for supplying amplified video output signals to the cathode of a kinescope. The high voltage amplifier includes linear and non-linear feedback paths which, in combination, determine a nominal closed loop gain for the amplifier. The non-linear path includes amplitude and frequency dependent elements for increasing the closed loop gain of the amplifier by a given amount in low brightness areas (black to gray) displayed by the kinescope (thus improving dark picture detail) and increases the closed loop gain of the amplifier by substantially the same given amount for high frequency video detail signal components in high brightness picture areas (thus improving subjective contrast without spot blooming and avoiding the impression of "washed-out" pictures.
    • 高电压,反相,显像管驱动放大器在其输入处耦合到要放大的低电压视频输入信号源,并在其输出端耦合,以将放大的视频输出信号提供给显像管的阴极。 高压放大器包括线性和非线性反馈路径,其组合地确定放大器的标称闭环增益。 非线性路径包括幅度和频率相关元件,用于在显像管显示的低亮度区域(黑色至灰色)中将放大器的闭环增益提高给定量(从而改善暗图像细节),并增加闭环增益 通过与高亮度图像区域中的高频视频细节信号分量基本上相同的给定量(从而改善主观对比度,而不会出现斑点,并避免“冲出”图像的印象)。