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    • 51. 发明申请
    • ASYMMETRIC PICTURE COMPRESSION
    • 不对称图片压缩
    • WO1991019384A1
    • 1991-12-12
    • PCT/US1991003733
    • 1991-05-29
    • THOMSON CONSUMER ELECTRONICS, INC.WILLIS, Donald, HenryCANFIELD, Barth, Alan
    • THOMSON CONSUMER ELECTRONICS, INC.
    • H04N05/262
    • H04N9/641G06T3/0012G06T3/4007H04N3/223H04N3/227H04N3/27H04N5/2624H04N5/45H04N7/007H04N7/01H04N7/0105H04N7/0122H04N7/015H04N9/64H04N19/90
    • A wide screen television apparatus comprises a video display (244) having a first format display ratio of width to height, for example approximately 16x9. A first video signal defines a first picture. A second video signal defines a second picture in a second format display ratio of width to height smaller than the first format display ratio, for example approximately 4x3. A video signal processor (301) asymmetrically compresses the second picture, for example 4:1 horizontally and 3:1 vertically. A video memory (420) stores lines of video of the asymmetrically compressed picture. Another video signal processor (300) combines portions of lines of video in the first video signal with the stored lines of video of the asymmetrically compressed picture for simultaneous display of the first and second pictures. The asymmetrically compressed second picture is displayed without aspect ratio distortion. The second picture can form an inset within the first picture. A single picture display can itself comprise a full screen of pictures from one source or from multiple sources.
    • 宽屏幕电视设备包括具有宽度与高度的第一格式显示比例的视频显示器(244),例如大约16×9。 第一视频信号定义第一图像。 第二视频信号以比第一格式显示比例小的宽度与高度的第二格式显示比定义第二图像,例如大约4×3。 视频信号处理器(301)不对称地压缩第二图像,例如水平地为4:1,垂直地为3:1。 视频存储器(420)存储不对称压缩图像的视频行。 另一个视频信号处理器(300)将第一视频信号中的视频行的部分与存储的非对称压缩图像的视频行组合,用于同时显示第一和第二图像。 显示不对称压缩的第二图像,而不显示纵横比失真。 第二张照片可以在第一张照片中形成一个插图。 单个图像显示器本身可以包括来自一个源或多个源的全屏图像。
    • 52. 发明申请
    • LINE MEMORY AND CONTROL SYSTEM
    • 线路存储器和控制系统
    • WO1991019381A1
    • 1991-12-12
    • PCT/US1991003810
    • 1991-05-30
    • THOMSON CONSUMER ELECTRONICS, INC.ERSOZ, Nathaniel, HalukSAEGER, Timothy, William
    • THOMSON CONSUMER ELECTRONICS, INC.
    • H04N05/14
    • H04N9/641G06T3/0012G06T3/4007H04N3/223H04N3/227H04N3/27H04N5/2624H04N5/45H04N7/007H04N7/01H04N7/0105H04N7/0122H04N7/015H04N9/64H04N19/90
    • A line memory and control system comprises a line memory (356, 358) for example a first in first out (FIFO) device. A comparator (1102) compares a first value (P), specifying a location in the horizontal line period where reading or writing of the line memory is to begin, with a second value (Q), fixing pixel location within each line period. A register stores the number of data samples in the line memory. A counter (1106) counts the number of data samples which have actually been written into the line memory or read from the line memory. The counter (1106) has an output of the comparator (1102) as a first input (LD) and the number of data samples previously stored in the line memory as a second input (LDIN). In the case of both compression and expansion, a line memory control system assures that the number of samples written into each FIFO line memory (356, 358) be the same as the number of samples read out of each FIFO line memory.
    • 行存储器和控制系统包括例如先进先出(FIFO)设备的行存储器(356,358)。 比较器1102将指定行开始的行存储器的读取或写入的水平行周期中的位置的第一值(P)与第二值(Q)进行比较,固定每个行周期内的像素位置。 一个寄存器存储行存储器中的数据样本数。 计数器(1106)对实际已经被写入行存储器或从行存储器读取的数据样本的数量进行计数。 计数器(1106)具有作为第一输入(LD)的比较器(1102)的输出和先前存储在行存储器中的数据样本的数量作为第二输入(LDIN)。 在压缩和扩展的情况下,行存储器控制系统确保写入每个FIFO行存储器(356,358)的样本数量与从每个FIFO行存储器读出的采样数相同。
    • 53. 发明申请
    • DIGITAL IMAGE CODING USING A RANDOM SCANNING OF IMAGE FRAMES
    • 数字图像编码使用图像帧的随机扫描
    • WO1991014295A1
    • 1991-09-19
    • PCT/EP1991000449
    • 1991-03-09
    • THOMSON CONSUMER ELECTRONICS S.A.SAVATIER, TristanDELPUCH, Alain
    • THOMSON CONSUMER ELECTRONICS S.A.
    • H01N07/133
    • H04N19/00H04N19/126H04N19/13H04N19/139H04N19/146H04N19/152H04N19/172H04N19/176H04N19/18H04N19/182H04N19/60H04N19/61H04N19/91H04N19/98
    • In a coder frames of a digital video signal are scanned in a pseudo-random order to get blocks of pixels, motion vectors are estimated and block errors are calculated, thereby providing an intra/inter decision signal and intraframe-blocks of pixel values or motion compensated interframe-blocks of pixel difference values depending on the result of the block error. The blocks of pixel values ond pixel difference values, respectively, are transformed with a DCT to blocks of coefficients, coded together with the motion vectors in a Huffman coder with variable wordlength. The resulting groups of coded coefficients are quantized individually by the use of a quantization level and the coded coefficients of the group are individually quantized by the use of a quantization matrix, controlled by the fullness of a buffer. In a decoder groups of coded coefficients which belong to blocks of pixels are de-quantized individually by the use of an encoding quantization level and each coded coefficient of each group is de-quantized individually by the inverse use of an encoding quantization matrix, controlled by the fullness of a buffer. The groups of coded coefficients and motion vectors are decoded in a Huffman decoder with variable wordlength, thereby providing blocks of decoded coefficients. The blocks of decoded coefficients are transformed with an inverse DCT to pixel values and pixel difference values, respectively, out of which blocks of pixels out of intraframe-blocks of pixel values and motion compensated interframe-blocks of pixel difference values, respectively, are generated depending on an intra/inter decision signal, thereby evaluating the motion vectors. The blocks of pixels are inserted again in frames of a digital video signal in an according pseudo-random order. Because of the pseudo-random scanning the quantization level of the blocks of the coded digital image frames is spatially distributed and the visibility of a varying picture quality within a frame is reduced.
    • 在编码器中,以伪随机顺序扫描数字视频信号的帧以获得像素块,估计运动矢量并计算块错误,从而提供帧内/帧间决定信号和像素值或运动的帧内块 取决于块错误的结果的像素差值的补偿帧间块。 将像素值的像素差分值的块分别用DCT变换成具有可变字长度的霍夫曼编码器中的运动矢量的系数块。 通过使用量化级别分别对所得到的编码系数组进行量化,并且通过使用由缓冲器的饱和度控制的量化矩阵来单独量化组的编码系数。 在解码器中,属于像素块的编码系数组通过使用编码量化级别分别进行去量化,并且通过逆序使用编码量化矩阵来对每组的每个编码系数进行单独去量化,由 一个缓冲区的丰满。 编码系数和运动矢量组在具有可变字长度的霍夫曼解码器中解码,从而提供解码系数块。 解码系数的块被分别变换成像素值和像素差值,分别从像素值的帧内块和像素差值的运动补偿帧间块中分别出现的像素块中的像素值和像素差值 取决于帧内/帧间决定信号,由此评估运动矢量。 以相应的伪随机顺序将像素块重新插入数字视频信号的帧中。 由于伪随机扫描,编码数字图像帧的块的量化级别在空间上分布,并且帧内的变化图像质量的可视性降低。
    • 54. 发明申请
    • PROCESS AND DEVICE FOR THE AUTOMATIC CORRECTION OF GEOMETRY, SUPERPOSITION OF COLOURS AND UNIFORMITY OF IMAGE FOR A TELEVISION CAMERA
    • 自动校正几何图像的过程和设备,色彩的保护和电视摄像机的图像均匀性
    • WO1991011075A1
    • 1991-07-25
    • PCT/FR1991000022
    • 1991-01-14
    • THOMSON CONSUMER ELECTRONICSGUERIN, Jean-ClaudeMOREL Philippe
    • THOMSON CONSUMER ELECTRONICS
    • H04N09/093
    • H04N3/2335H04N3/23H04N5/217H04N9/093
    • According to the invention, the device for carrying out the process comprises on the one hand, a processor (2) connected by a data line (12) to a correction memory (3), a measuring circuit (9), and to a digital/analog converter (4), and on the other hand, an adder circuit connected to the output of the digital/analog converter (4) and to the output of the camera's scanning circuit in order to add to the saw tooth signal provided by the camera the correction values given by the correction memory in synchronism with the camera scanning. The correction values result from an evaluation of the position error of pattern centres of an optical test pattern restored by the camera and of their homologues in an electronic test pattern. Intermediate correction values are calculated for each pattern by interpolation of the position errors of the pattern centres by means of a third order interpolation polynomial. Application: high definition television.
    • 根据本发明,用于执行该处理的装置一方面包括通过数据线(12)连接到校正存储器(3)的处理器(2),测量电路(9)和数字 /模拟转换器(4),另一方面,连接到数/模转换器(4)的输出端和摄像机扫描电路的输出端的加法器电路,以增加由 相机与相机扫描同步摄像由校正存储器给出的校正值。 校正值由对电子测试图案中由照相机及其同系物恢复的光学测试图案的图案中心的位置误差的评估产生。 通过三阶插值多项式对图案中心的位置误差进行插值来计算每个图案的中间校正值。 应用:高清电视。
    • 58. 发明申请
    • DISPLAY DRIVER APPARATUS
    • 显示驱动器
    • WO1999031876A1
    • 1999-06-24
    • PCT/US1997022765
    • 1997-12-12
    • THOMSON CONSUMER ELECTRONICS, INC.WHITE, Charles, MichaelLAGONI, William, Adamson
    • THOMSON CONSUMER ELECTRONICS, INC.
    • H04N05/14
    • H03G11/02H03F3/19H04N5/148
    • An emitter follower amplifier is coupled between the output of a high voltage video amplifier and the cathode of a kinescope for reducing the effective capacitance presented to the video amplifier that is attributable to the kinescope cathode, socket, spark gaps, and related stray capacitances. A secondary undesired capacitance loading of the video amplifier is effectively reduced by regulating the collector-emitter voltages of the emitter follower output transistors at substantially constant values thereby improving parameters such as slew rate and bandwidth of the overall video display system. Nonlinear circuitry in the follower circuit facilitates accurate AKB current sensing and provides simplification of the voltage regulation circuitry. White limiting circuitry is included within the video amplifier for reducing excess peak white drive that results in objectionable smears. Black limiting circuitry within the video amplifier is also provided to prevent the collapse of the collector-emitter voltage of the push-pull follower output transistor. The heat sink capacitance of the video amplifier output transistor is screened out via bootstrapping.
    • 射极跟随器放大器耦合在高电压视频放大器的输出端和显象管的阴极之间,用于降低归因于显象管阴极,插座,火花间隙和相关杂散电容的视频放大器的有效电容。 通过以射极跟随器输出晶体管的集电极 - 发射极电压为基本恒定的值来有效地减小视频放大器的次要不需要的电容负载,从而改善整个视频显示系统的转换速率和带宽等参数。 跟随器电路中的非线性电路有助于精确的AKB电流检测,并提供电压调节电路的简化。 视频放大器中包含白色限制电路,用于减少过多的峰值白色驱动器,导致令人反感的涂片。 还提供视频放大器内的黑色限制电路以防止推挽跟随器输出晶体管的集电极 - 发射极电压的崩溃。 视频放大器输出晶体管的散热电容通过自举进行屏蔽。