公开(公告)号：WO1990005430A1

公开(公告)日：1990-05-17

申请号：PCT/US1989004623

申请日：1989-10-20

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  HURST, Robert, Norman, Jr.

IPC: H04N11/00

CPC classification number: H04N11/006

Abstract: By employing different independent polarity codes to polarity-modulate (302, 310, 312) respective quads of averaged values (300, 306, 308) in the vertical-temporal plane of luma, chroma, sidepanel and enhanced-luma components in the mid-frequency and/or high frequency split-bands of a 4.2 MHz baseband television-type signal, the encoded components can be combined (304) into successive composite quads of an encoded single channel, NTSC compatible, enhanced-definition 4.2 MHz bandwidth television signal. The successive composite quads of the encoded signal can be decoded (400-412) by a widescreen receiver without crosstalk taking place amount the components, while such an encoded signal does not noticeably affect the display of a standard NTSC receiver.

公开(公告)号：WO1990005427A1

公开(公告)日：1990-05-17

申请号：PCT/US1989004564

申请日：1989-10-17

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  KOSLOV, Joshua, Lawrence ,  ZDEPSKI, Joel, Walter

IPC: H04N07/137

CPC classification number: H04N11/008 ,  H04N19/50

Abstract: A video signal processing system employs an amplitude compander for reducing the effects of transmission noise. The compander includes a transmitter nonlinear amplitude compressor (12) for amplifying small signals and compressing large signals. A receiver includes an amplitude expander with an inverse transfer function. The nonlinear compressor (12) generates out-of-band frequencies which are removed by a transmitter output filter (14), producing signal distortion. To compensate for such distortion, the transmitter duplicates certain receiver processing circuits, including the receiver amplitude expander (16) and a filter (18, 20, 22) for generating a prediction signal. The prediction signal is subtracted (10) from the transmitter input video signal before the video signal is amplitude compressed at the transmitter, producing an error signal which is transmitted. The error signal is small if the prediction is good, whereby noise reduction results from compressor gain at the transmitter.

公开(公告)号：WO1990004311A1

公开(公告)日：1990-04-19

申请号：PCT/US1989003328

申请日：1989-08-07

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  ISNARDI, Michael, Anthony

IPC: H04N11/00

CPC classification number: H04N9/78 ,  H04N11/002

Abstract: The luminance component of a video signal is processed (12, 16, 18, 20, 21, 32) to produce a luminance component with groups of mutually exclusive spatially correlated image pixels of identical value within each group. In one embodiment each group comprises vertically averaged pixels 1H apart within a field. In another embodiment each group comprises vertically averaged pixels 263H apart within a frame. The chrominance component is similarly processed (22, 24, 26, 29). The processed luminance and chrominance components are combined (33) using an invertible algorithm involving additive and subtractive signal combination. At a decoder, the inverse of the combining algorithm is used (40, 42, 44, 46, 48) to separate the combined signal into its constituent luminance and chrominance component parts, without luminance-chrominance crosstalk.

公开(公告)号：WO1990003417A1

公开(公告)日：1990-04-05

申请号：PCT/US1989004105

申请日：1989-09-21

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  GOSENS, Johannes, Cornelis ,  SAVENIJE, Herman, Bernard ,  PRATT, Charles, Franklin ,  CLAESEN, Christianus, Adrianus, Arnoldus

IPC: C08L69/00

CPC classification number: C08L51/04 ,  C08K5/521 ,  C08L69/00 ,  C08L2666/02 ,  C08L85/00

Abstract: The invention relates to a polymer mixture which comprises an aromatic polycarbonate, a styrene-containing copolymer and/or a styrene-containing graft polymer and a flame-retardant. It has been found that the use of a certain type of flame-retardants, namely poly(aryl-arylene phosphates) or poly(aryl-arylene phosphonates) leads to a polymer mixture having improved properties. In particular a polymer mixture having a higher heat distortion temperature is obtained.

公开(公告)号：WO1990003084A1

公开(公告)日：1990-03-22

申请号：PCT/US1989003453

申请日：1989-08-16

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  DIETERICH, Charles, Benjamin

IPC: H04N11/00

CPC classification number: H04N11/002 ,  H04N7/015

Abstract: An NTSC compatible widescreen EDTV system encodes a television signal via a process including intraframe averaging (38) of mutually exclusive successive paired groups of image pixels above a given frequency. At a decoder, intraframe averaged luminance image information is interpolated (1343) on a line-by-line basis to help reduce unwanted jagged diagonal image artifacts. Vertical peaking is associated with intraframe averaging at the encoder.

公开(公告)号：WO1989002690A1

公开(公告)日：1989-03-23

申请号：PCT/US1988003016

申请日：1988-09-09

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  ISNARDI, Michael, Anthony

IPC: H04N11/00

CPC classification number: G06T9/004 ,  H04N11/008

Abstract: An NTSC compatible widescreen EDTV system encodes and decodes a television signal comprising: (1) a main, standard format NTSC signal (N) component with low frequency side panel image information compressed into the overscan regions thereof; (2) a time expanded high frequency side panel image information (X) component; and (3) an extended high frequency horizontal luminance image information component (Z). Components (2) and (3) modulate an alternate subcarrier (ASC) which exhibits a frequency other than the frequency of a chrominance subcarrier within a band of frequencies occupied by chrominance image information.

Abstract translation: NTSC兼容宽屏EDTV系统对电视信号进行编码和解码，包括：（1）压缩到其过扫描区域中的具有低频侧面板图像信息的主标准格式NTSC信号（N）分量; （2）时间扩展的高频侧面板图像信息（X）分量; 和（3）扩展的高频水平亮度图像信息分量（Z）。 组件（2）和（3）调制在色度图像信息占据的频带内呈现除了色度副载波频率之外的频率的备用副载波（ASC）。

公开(公告)号：WO1989002685A1

公开(公告)日：1989-03-23

申请号：PCT/US1988003011

申请日：1988-09-09

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  ISNARDI, Michael, Anthony

IPC: H04N11/00

CPC classification number: H04N11/008 ,  G06T9/004

Abstract: A system for encoding a progressive scan widescreen EDTV signal so as to be compatible with a standard NTSC receiver develops an auxiliary signal (YT) containing vertical-temporal information derived from image field difference information of the progressive scan signal. The auxiliary signal facilitates the conversion of the encoded NTSC compatible signal (NTSCF) to progressive scan format in a widescreen progressive scan receiver.

公开(公告)号：WO1988008567A1

公开(公告)日：1988-11-03

申请号：PCT/US1988001294

申请日：1988-04-27

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  TATE, Larry, Richard

IPC: G06F07/52

CPC classification number: H03H17/0239 ,  G06F7/4824

Abstract: A truncated product partial canonical signed digit (PCSD) multiplier (10) is disclosed for use in a finite impulse response (FIR) digital filter. Each multiplier quantity (19) is coded as two non-zero signed digits in an 8-bit word. Each non-zero signed digit is recoded into a four bit nibble (16a and 16b) for application to the multiplier. Each partial product output of the multiplier (A and B) is truncated from 16 to 11 bits. The multiplier operations are performed in the sequence shift right, truncate, one's complement, add partial products and, according to the output of a logic control circuit, add one into an appropriate order.

Abstract translation: 公开了用于有限脉冲响应（FIR）数字滤波器的截断乘积部分规范有符号数（PCSD）乘法器（10）。 每个乘法器数量（19）被编码为8位字中的两个非零有符号数字。 每个非零符号数字被重新编码为四位半字节（16a和16b），以应用于乘法器。 乘法器（A和B）的每个部分乘积输出从16位截断。 乘法运算按序列右移，截断，补码，部分乘积执行，根据逻辑控制电路的输出，以适当顺序加一。

公开(公告)号：WO1988008237A1

公开(公告)日：1988-10-20

申请号：PCT/US1988001157

申请日：1988-04-13

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  SCHIFF, Leonard, Norman

IPC: H04N07/13

CPC classification number: H04N19/152 ,  H04N19/124 ,  H04N19/50 ,  H04N19/503

Abstract: A digital television transmitter has a buffer (28) that receives a low resolution low pass filtered signal (26). A high resolution high pass filtered signal (30) is applied to the buffer only when the buffer can accept it without overflowing. A digital television receiver receives a digital television picture signal (32') and preferably a transmitter buffer occupancy state signal (34'). A low resolution low pass filtered signal (22') is applied to an adder (68). A high resolution high pass filtered signal (24') is applied to the adder when the buffer state is low and also when it is intermediate and no substantial motion is present. The transmitter and receiver are useful in video teleconferencing.

公开(公告)号：WO1988008202A1

公开(公告)日：1988-10-20

申请号：PCT/US1988001156

申请日：1988-04-13

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  HSU, Sheng, Teng

IPC: H01L21/265

CPC classification number: H01L29/0847 ,  H01L29/78609

Abstract: An N-channel transistor formed in a layer of semiconductor material disposed on a insulating substrate is disclosed. The source region has a depth less than the thickness of the semiconductor layer so that a P-type region can be formed in the semiconductor layer between the source region and the insulating substrate. This P-type region has an impurity concentration sufficient to prevent the depletion region of the source from extending to the interface between the layer of semiconductor material and the substrate. The P-type region substantially prevents back-channel leakage currents from flowing between the source region and the drain region along the portion of the layer of semiconductor material immediately adjacent the insulating substrate when the device has been irradiated.