Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4870480 | Subnyquist demodulator as for a television receiver An asymmetrical sideband modulated (ASM) signal, such as an RF NTSC television signal is demodulated into in-phase and quadrature phase components, each of which are sampled at a sampling rate that is less than the Nyquist rate for the components. The sig... | 09/26/1989 |
| 4868650 | Circuitry for expanding the effect of a video control signal in multiple dimensions A control signal spreader for ameliorating undesirable effects of abrupt changes in a control signal in a video signal processor gradually changes the magnitude of the control signal in the horizontal, vertical and temporal dimensions of the video signal.... | 09/19/1989 |
| 4868660 | Circuit arrangement for unobjectionable switching between TV-channels as in a TV receiver A TV receiver having circuitry for precluding objectionable display patterns during channel switching includes a frame store for successively storing frames of video signal being displayed. A controlled switch, responsive to the switching signal and a syn... | 09/19/1989 |
| 4866521 | Advanced compatible television system with auxiliary carrier An NTSC compatible widescreen EDTV system comprises three components: (1) a main component containing center panel information and low frequency side panel information; (2) an auxiliary component containing side panel high frequency information; and (3) a... | 09/12/1989 |
| 4866509 | System for adaptively generating signal in alternate formats as for an EDTV system A video signal generating system develops an encoded video signal representing less than all of the video information. Auxiliary signal generating circuitry develops a pair of auxiliary signals representing in part the remaining video information. A first... | 09/12/1989 |
| 4864399 | Television receiver having skew corrected clock A digital TV receiver includes an apparatus for generating a skew corrected clock. The apparatus consists of a fixed frequency, free running oscillator for producing a signal having a frequency which is a fixed integer multiple K of the desired nominal fr... | 09/05/1989 |
| 4864403 | Adaptive television ghost cancellation system including filter circuitry with non-integer sample delay A television signal ghost cancellation system is described in which a microprocessor is used to develop a mathematical model of the transmission channel which produced a ghosted video signal. The microprocessor determines the coefficient values and delay ... | 09/05/1989 |
| 4853766 | Widescreen video signal processor with auxiliary modulated by widescreen information A widescreen television signal having left side, right side and center panel information is converted into a signal compatible with a standard television system, such as NTSC. In the compatible signal, center panel information is expanded to occupy the st... | 08/01/1989 |
| 4845562 | Widescreen television reception and recording system utilizing conventional equipment A system is disclosed for partially decoding an encoded widescreen, extended definition television signal into a signal that is compatible with existing consumer video cassette recorders (VCRs) and video monitors. The encoded signal is compatible with exi... | 07/04/1989 |
| 4839728 | Picture-in-picture video signal generator A picture-in-picture video signal generator includes a source of an auxiliary video signal, and a producer of successive samples representing the auxiliary video signals. A self-sequencing memory includes a data input terminal coupled to the producer of a... | 06/13/1989 |
| 4839720 | Compatible widescreen television system with auxiliary subcarrier modulated by side panel high frequency information A widescreen television signal having left side, right side and center panel information is converted into a signal compatible with a standard television system, such as NTSC. In the compatible signal, center panel information is expanded to occupy the st... | 06/13/1989 |
| 4823302 | Block oriented random access memory able to perform a data read, a data write and a data refresh operation in one block-access time A video memory system which uses dynamic digital data storage elements allows random access to blocks of 32 pixel values. The pixel values to be stored in a block are applied sequentially to the memory system and the pixel values provided by the memory sy... | 04/18/1989 |
| 4821226 | Dual port video memory system having a bit-serial address input port A dual port digital memory system, which includes integral memory sequencing circuitry, is controlled by a bit-serial address and control signal. The address and control signal, which includes a data read address, a data write address and a control value,... | 04/11/1989 |
| 4816913 | Pixel interpolation circuitry as for a video signal processor A processor for expanding a compressed video signal includes a pixel interpolator which interpolates between input pixel values in two dimensions. This interpolator calculates and stores intermediate pixel values which are interpolated in the vertical dir... | 03/28/1989 |
| 4814879 | Signal phase alignment circuitry Circuitry for aligning the transition of a clock signal to transitions of a horizontal line synchronizing signal includes a series of delay elements which provide a plurality of clock signal phases. The longest phase delay provided by this circuitry is gr... | 03/21/1989 |
| 4814860 | Television picture zoom system having chroma phase restoration circuit In a TV receiver having a zoom system, the chroma signal is vertically and horizontally expanded by repeating the successive lines and pixels. The polarity of the vertically and horizontally chroma signal is selectively inverted in a manner restoring the ... | 03/21/1989 |
| 4811103 | Interlace inversion corrector for a picture-in-picture video signal generator A picture-in-picture video signal generator includes a source of an auxiliary video signal, and a producer of successive samples representing the auxiliary video signal. A self-sequencing memory includes a data input terminal coupled to the producer of au... | 03/07/1989 |
| 4803647 | Sampled data audio tone control apparatus A sampled data tone control circuit is implemented using a two pole canonic recursive/non-recursive filter. The filter is programmed with predetermined sets of sample weighting coefficients to selectively cut or boost either the base or treble band of fre... | 02/07/1989 |
| 4802009 | Digitally controlled phase locked loop system A phase locked loop system for generating a line-locked clock signal for a television signal processing system includes an analog phase-locked loop nested within a digital phase locked loop. The analog phase-locked loop is synchronized to a reference sign... | 01/31/1989 |
| 4802000 | Video switching apparatus having interference prevention feature A Y/C selector switch is coupled to receive a first pair of internally-separated component signals Y1, C1 in addition to a second and a third pair of externally-supplied wideband component signals Y2, C2 and Y | 01/31/1989 |
| 4797942 | Pyramid processor for building large-area, high-resolution image by parts A technique, employing image-processing pyramids, which is capable of combining a plurality of small-area high-resolution sub-images, such as may be derived from an array of television cameras, into a single large-area high-resolution image, with substant... | 01/10/1989 |
| 4792856 | Sampled data memory system as for a television picture magnification system A television picture magnification system which provides real-time magnified video images includes a memory system which stores L horizontal line intervals of samples representing one field of the unmagnified video image during a first time interval and w... | 12/20/1988 |
| 4791594 | Random-access psuedo random number generator A system for generating a series of psuedo random numbers so that numbers in the sequence may be randomly accessed. The system includes apparatus for scrambling the bits of a plurality of seed numbers. The pattern of bit scrambling is governed by the cont... | 12/13/1988 |
| 4791580 | Display processor updating its color map memories from the serial output port of a video random-access memory A display processor for a computer with graphics capability includes color map memories addressed by portions of pixel codes during display line trace intervals. The read-outs from these color map memories provide the primary color component signals from ... | 12/13/1988 |
| 4791488 | Line-locked clock signal generation system A television receiver includes a phase-locked loop (PLL) which generates a clock signal having a frequency of N times the line frequency and being phase-locked to the horizontal line synchronizing signal. The clock signal produced by this PLL has a freque... | 12/13/1988 |
| 4789960 | Dual port video memory system having semi-synchronous data input and data output A dual port video memory system includes a serial-to-parallel converter coupled to the input data port and a parallel-to-serial converter coupled to the output data port. Four-bit pixel values are clocked into the serial-to-parallel converter synchronous ... | 12/06/1988 |
| 4787056 | Apparatus for estimating the square of digital samples Apparatus for estimating the square of a multi-bit digital sample having a value (A+B) segments the sample into a most significantf bit (MSB) portion having the value A, and a least significant bit (LSB) portion having a value B. The LSB portion is added ... | 11/22/1988 |
| 4786963 | Adaptive Y/C separation apparatus for TV signals An adaptive luma/chroma separation apparatus is herein disclosed. Means, including delay elements and bandpass filters, are employed to generate a set of three bandpassed signals Bb, Mb and Tb, which are delayed with respe... | 11/22/1988 |
| 4785352 | Sampled data amplitude detector as for an AGC multiplier A sampled data signal amplitude detector for use in PLL's, for example, includes an absolute value detector to generate the magnitudes of the signal samples to be measured. The magnitudes of pairs of successive samples are compared and the larger magnitud... | 11/15/1988 |
| 4785349 | Digital video decompression system A full motion color digital video signal is compressed, formatted for transmission, recorded on compact disc media and decoded at conventional video frame rates. During compression, regions of a frame are individually analyzed to select optimum fill codin... | 11/15/1988 |
| 4783698 | Interpolator for compressed video data A simplified-in-structure vertical interpolator for compressed video data down-loaded from image memory to an odd-line line storage memory and an even-line line storage memory is followed in cascade by a horizontal interpolator. The horizontal interpolato... | 11/08/1988 |
| 4783756 | Sampled data tone control system A sampled data treble control system, requiring a single multiplier element, includes the cascade connection of a first adder, the multiplier, and a second adder coupled between the system input and output terminals. A subtracter develops the differences ... | 11/08/1988 |
| 4782391 | Multiple input digital video features processor for TV signals A video features processor for use with a display device includes a first clock that is line locked to the display and a skew-shifted second clock that is phase locked to the horizontal sync component of an auxiliary video signal. An A/D converter, respon... | 11/01/1988 |
| 4782389 | Adaptive M-tile sample producer Apparatus is disclosed for adaptively producing a sample having a desired M-tile value, and includes a source of a set of input samples and a source of a control signal. Means are provided for adaptively masking or replacing a subset of the input samples ... | 11/01/1988 |
| 4777851 | Automatic fastener attachment system A three-stage system movable in three orthogonal directions includes a pair of cam rods and a screw insertion device secured to one of the stages for displacement in three orthogonal directions. A cabinet has a screw receiving aperture pedestal with apert... | 10/18/1988 |
| 4777385 | Signal transient improvement circuit A transition enhancing circuit includes a tapped delay line which provides successively delayed replicas of the signal to be processed. A multiplexer, responsive to a signal transition, sequentially couples delayed signal from the center tap and taps more... | 10/11/1988 |
| 4777481 | Display processor for image data with non-constant pixel size for chromatic values The invention is embodied in a system comprising image memory and a display processor that automatically processes video data which alternate between having chrominance pixels of greater area than luminance pixels and having chrominance pixels of the same... | 10/11/1988 |
| 4774686 | Serial digital signal processing circuitry A serial-bit digital processing system uses registers and latches to synchronize samples and justify sign-bits. Nominally each processing block in the system includes a sign extend register preceding an arithmetic element and an output register following ... | 09/27/1988 |
| 4774581 | Television picture zoom system A digital video zoom system includes circuitry for writing image samples into a memory at a standard rate and for reading samples from the memory at a reduced rate. Samples are read from the memory under control of a digital accumulator which repeatedly a... | 09/27/1988 |
| 4772937 | Skew signal generating apparatus for digital TV A divider divides down the output of a high frequency oscillator to generate a master clock signal MCS for the purposes of sampling an incoming composite video signal CVS. A skew measuring circuit latches the current state of the divider at a predetermine... | 09/20/1988 |
