Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8059199 | Synchronizing signal detection circuit The present invention provides a synchronizing signal detection circuit capable of always stably detecting a synchronizing signal. The synchronizing signal detection circuit predicts detection positions of synchronizing pulses every synchronization cycle peculiar to... | 11/15/2011 |
| 7705917 | Method and circuit for extracting synchronization signals in a video signal The invention relates a method of extracting synchronization signals from an input video signal (Csync) comprising horizontal synchronization pulses at the start of video lines, for generating a horizontal synchronization signal (Hsync), said method comprising:—a ... | 04/27/2010 |
| 7423694 | Self-calibrating timing circuits for use in a sync separator Provided herein are self-calibrating timing circuits and methods for use in a sync separator. A comparator compares a video signal to a video reference voltage to produce a sliced sync signal that has a frequency that is equal to a scan frequency of a horizontal syn... | 09/09/2008 |
| RE40411 | Synchronizing signal separating apparatus and method This invention is a method and apparatus for identifying and separating the synchronizing signal component of video like signals by identifying or detecting the arrangement or sequence of the known occurances of events or patterns of the sync. The invention also pro... | 07/01/2008 |
| RE40412 | Synchronizing signal separating apparatus and method The present invention provides a synchronizing signal separation. In accordance with the present invention, a sync pulse processing circuitry slices a video signal and senses the peaks of the synchronizing pulse. A reference generating circuitry divides the output f... | 07/01/2008 |
| 7349032 | Circuit to resize and enlarge an image signal and resizing and enlargement method for an image signal The invention provides an image processing circuit having a capability of performing a reduction (resizing) process and an enlargement process on horizontal-scanning-line data inputted in synchronization with an input horizontal synchronization signal, and subsequen... | 03/25/2008 |
| 7271843 | Method and apparatus for analyzing a digitally converted analogue signal A method for obtaining line synchronization information items from a video signal is proposed. The inventive method is based on convolving the relevant part of an analogue video line signal with a pattern function. The result of the convolution operation is further ... | 09/18/2007 |
| 7268825 | Digital synchronizing generator A sync generator (genlock) (10) for frequency and phase locking an incoming video signal to a system clock (12) includes a digitizer (16, 22) for digitizing the incoming video signal to yield a digitized color sub-carrier burst component. A nume... | 09/11/2007 |
| 7253844 | Method and arrangement for synchronising on-screen display functions during analog signal reception A method and an arrangement are disclosed for synchronizing on-screen display functions during analog signal reception in a terminal arrangement that is capable of receiving both digital and analog video signals. There are provided means (312, 313) for genera... | 08/07/2007 |
| 7236683 | Method and apparatus for providing or enhancing copy protection by adding selected negative-going and positive-going pulses in a video signal HBI The horizontal blanking interval (HBI) of a normal video signal is modified to enhance the playability of the applied copy protected video signal while maintaining the copy protection effectiveness. As generally known, a copy protected video signal with positive-goi... | 06/26/2007 |
| 7184096 | Method and circuit for providing a horizontal scan signal for a television set A method for providing a horizontal scan control signal for a TV set from a horizontal synchronization signal contained in a composite video signal, the horizontal synchronization signal containing horizontal synchronization pulses and parasitic pulses, the scan con... | 02/27/2007 |
| 7180550 | Video reproducing apparatus and method and apparatus and method for adjusting horizontal synchronous signal A video signal reproducing apparatus and method for adjusting a change in a horizontal synchronous signal. The video signal reproducing apparatus transforms a format of an input video signal, generates horizontal and vertical synchronous signals, and displays the vi... | 02/20/2007 |
| 7176979 | Synchronization pulse detection circuit A synchronization pulse detector includes an absolute value independent shape detector for processing samples of an input signal having a synchronization pulse and a plurality of non-synchronization pulses to determine whether such samples have a predetermined seque... | 02/13/2007 |
| 7173668 | Equilibrium based horizontal sync detector for video decoder The present invention discloses a horizontal sync detector circuit (10) comprising a filter portion (12), an equilibrium accumulator portion (14) coupled to the filter portion (12), a horizontal sync detector portion (16) coupled t... | 02/06/2007 |
| 7098961 | Horizontal sync pulse detection for video signal decoding Methods and systems are described for determining a slice level used for detecting an edge of a horizontal sync pulse of a horizontal line of a video signal, where the horizontal line has a plurality of samples. An exemplary method comprises low-pass filtering the v... | 08/29/2006 |
| 7053959 | Digital video encoder A mask circuit masks a digital video signal so that a video signal of an analog video signal is not outputted for a predetermined period after the start of output of a horizontal synchronizing signal of the analog video signal. A period of masking the digital video ... | 05/30/2006 |
| 7050111 | Process and device for synchronizing a reference signal with respect to a video signal A synchronization process may include detecting successive horizontal synchronization pulses of a video signal, and a phase comparison between the successive detected pulses and the successive transitions of the reference signal for controlling the oscillator of the... | 05/23/2006 |
| 6977692 | Alternative video sync detector A circuit for generating video synchronization timing signals includes a negative peak detector (FIG. 5) for following variations of a composite video signal (FIG. 1), rather than clamping the most negative voltage of the composite video signal. The ne... | 12/20/2005 |
| 6967687 | Display control apparatus and method A display control apparatus and a display control method are provided in which a resolution of an input image signal is judged, a change in the image signal is detected, and the image signal is adaptatively interpolated in accordance with the judgement and detection... | 11/22/2005 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6917387 | Arrangement for time-correct combination of two data streams Methods and apparatus are described for time-correct combination of two data streams, particularly video data streams. In this case, a sync signal of the first video data stream is a horizontal sync signal. In this case, methods and apparatus are provided to combine... | 07/12/2005 |
| 6909428 | Signal converter device The present invention provides a device for signal transfer, which outputs a treatment signal relating to a vertical-horizontal composite sync signal of a monitor and an integrated signal of the vertical-horizontal composite sync signal. There is a plurality of logi... | 06/21/2005 |
| 6882360 | Method and apparatus for determining a level of a video signal A method for estimating a level of a predetermined portion of a video signal comprising the steps of determining a location of the predetermined portion of the video signal, sampling the video signal during the predetermined portion and estimating the level as an av... | 04/19/2005 |
| 6788351 | Circuit and method for adjusting width of fly-back pulse in video signal processing unit realized in one chip A fly-back pulse width adjustment circuit and a method for adjusting the width of a fly-back pulse which are applied to a video signal processing unit realized as one chip are provided. The fly-back pulse width adjustment circuit is built into a video signal process... | 09/07/2004 |
| 6741291 | Synchronous signal detection with noise rejection A synchronous signal separation circuit 2 for separating horizontal synchronous signal HSn is connected to a horizontal synchronous signal detection circuit 3, which includes a switch 4, an oscillator 5 and a window signal generator 6 ... | 05/25/2004 |
| 6704056 | Horizontal deflection circuit and television receiver A video signal conversion part of a horizontal deflection circuit deletes a prescribed number of horizontal scanning lines from a vertical blanking interval of an input video signal and assigns a time corresponding to the deleted horizontal scanning lines... | 03/09/2004 |
| 6597403 | System for generating horizontal synchronizing signal compatible with multi-scan There can be solved a problem in which a lock range is narrowed by using an oscillator such as a ceramic having a high Q and a horizontal deflection frequency generating system compatible with all horizontal deflection frequencies of a variety of televisi... | 07/22/2003 |
| 6559891 | Method and apparatus to generate tri-level HDTV synchronization pulses An ITU-R BT.656 (or similar) digital video signal is converted to analog at which point a simple 7-state state machine in combination with a 6 bit binary counter generates tri-level synchronized video. The state machine receives vertical and horizontal sy... | 05/06/2003 |
| 6392708 | Horizontal display size compensation circuit for a monitor A horizontal display size compensation circuit for a monitor prevents a horizontal display size of a monitor screen from being changed when a horizontal frequency varies according to a video mode. A horizontal frequency is generated by a horizontal freque... | 05/21/2002 |
| 6271889 | Synchronization pulse detection circuit A synchronization pulse detector for detecting a synchronization pulse within an input signal. The input signal has "level" portions (i.e., substantially non-time varying portions) and "transition" portions (i.e., substantially time varying portions). The... | 08/07/2001 |
| 6271888 | Method for obtaining line synchronization information items from a video signal, and apparatus for carrying out the method A method for obtaining line synchronization information items from a video signal is proposed. To that end, the following improvement measures are proposed: a) an accurate determination of the position of a line synchronization pulse is effected by carryi... | 08/07/2001 |
| 6259485 | Sync separating circuit A level is preset into a counter. The level held in the counter is compared with the minimum value of the present video signal by a level detecting circuit. When the minimum value of the present video signal is lower than the level of the counter, the int... | 07/10/2001 |
| 6211920 | Circuit for the treatment of synchronization signals A signal treatment circuit treats an input signal containing line sync pulses used for displaying data on a screen. The circuit contains a phase locked loop to control horizontal sweeping according to active edges of line sync pulses, and a filter circuit... | 04/03/2001 |
| 6141064 | Luminance signal generation circuit with single clamp in closed loop configuration A luminance signal generation circuit with single clamp generates a separate luminance signal Y by combining RGB input signals in a weighted manner within a Y-Matrix circuit. During a burst period the single clamping circuit is enabled. When enabled, the ... | 10/31/2000 |
| 6130719 | Method and apparatus for accurately recovering the synchronization signals contained in composite video signals A method of recovering synchronization signals contained in a composite video signal. The synchronization signals are generally represented by voltage levels less than the blanking level of the video signal, and display data is represented by blanking lev... | 10/10/2000 |
| 6108043 | Horizontal sync pulse minimum width logic A horizontal sync separator that is capable of operating with horizontal sync signals of differing durations. A monostable is operated by the leading inverted negative edge of the horizontal sync pulse and generates a minimum duration horizontal pulse. Th... | 08/22/2000 |
| 6104435 | Apparatus and method for generating data segment sync signal for HDTV An apparatus for generating a sync signal of a data segment in a high definition television is disclosed including: a circuit (41) for delaying and integrating received data segment signals in the period of the segment; a delay circuit (42) for delaying t... | 08/15/2000 |
| 6100935 | Sync generator unit and field decision unit using it A field decision unit capable of solving a problem involved in a conventional field decision unit in that an internal synchronizing signal can be erroneously synchronized with the equalizing pulses of a video signal owing to noise because the output halt ... | 08/08/2000 |
| 6069667 | Synchronizing signal detecting device In a Sync signal detection circuit for detecting a Sync signal included in a television signal transmitted in a digital mode, pattern check means 2 checks a pattern of a Sync signal which is super imposed on a series of input data with a reference pattern... | 05/30/2000 |
| 6028640 | Current source and threshold voltage generation method and apparatus for HHK video circuit A current source and threshold voltage generation circuit generates a current, through a ratio of devices, and a corresponding threshold voltage signal, to be utilized by a timing circuit for generating a timing ramp and determining when the timing ramp c... | 02/22/2000 |
