Including Automatic Gain Control (agc) Patents (Class 348/528)
  • Patent number: 8817195
    Abstract: An embodiment of the present invention provides a method for digital television demodulation, comprising using adjacent-channel power dependent automatic gain control (AGC) for the digital television demodulation, wherein an AGC technique takes into account a total power as well as power of adjacent channels to control gain of a gain control amplifier.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: August 26, 2014
    Assignee: Intel Corporation
    Inventors: Parveen K. Shukla, Bernard Arambepola, Thushara Hewavithana, Sahan Gamage
  • Patent number: 8692938
    Abstract: There is provided a video processing device capable of reducing the influence of a disturbance of an input vertical synchronization signal. When the synchronization signal detecting unit detects an input of the input-side vertical synchronization signal at a predetermined cycle, the synchronization signal control unit outputs the input-side vertical synchronization signal, which has been input, as an output-side vertical synchronization signal, and, when the synchronization signal detecting unit detects an input of a next input-side vertical synchronization signal before the predetermined cycle elapses after the output of the output-side vertical synchronization signal, a next input-side vertical synchronization signal input before the predetermined cycle elapses is not output as a next output-side vertical synchronization signal, and an input-side vertical synchronization signal input further next is output as the next output-side vertical synchronization signal.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: April 8, 2014
    Assignee: Panasonic Corporation
    Inventor: Takashi Kuwabara
  • Patent number: 8478042
    Abstract: A method and apparatus for enhancing at least one of video and image quality using an exposure aware scene adaptive global brightness contrast. The method includes determining if gain control is needed utilizing Gamma corrected histogram and ancillary data, if gain control is not required, computing a set of scene adaptive tone points and blending with information from histogram equalization if needed, if gain control is required, estimating gain value and utilizing the gain value in computing the gain table, and accordingly, generating a look-up table for enhancing global brightness contrast utilizing the gain table, the tone table and the information from histogram equalization.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: July 2, 2013
    Assignee: Texas Instruments Incorporated
    Inventor: Rajesh Narasimha
  • Patent number: 8457312
    Abstract: An apparatus in a video signal transmission system for measuring cable length and compensating for cable loss is described. A number of pilot signals of different frequencies are compressed into one of the three color signals during the vertical sync periods in a time-division manner. The vertical and horizontal sync signals are compressed into the other two color signals. The video signal is transmitted over a cable having at least three pairs of wires, each color signal being transmitted by one pair of wires. A pilot signal converting circuit obtains the levels of the pilot signals transmitted by the cable. A compensation control circuit averages the levels of the multiple pilot signals of different frequencies over a number of vertical sync periods, and generates compensation control signals based on the average level of the pilot signals. The compensation control signals are used to perform video signal compensation.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: June 4, 2013
    Assignee: Aten International Co., Ltd.
    Inventors: Tsung I Yeh, Fu-Chin Shen
  • Patent number: 8269855
    Abstract: A low power color image capturing system having a power source, the system comprising: a narrow bandwidth illuminator adapted to provide illumination having a peak intensity defining a narrow bandwidth; an image capturing device adapted to capture a raw image from an object illuminated by the narrow bandwidth illuminator; and a processor adapted to control the system and having an algorithm operatable upon the raw image to provide a modified image; wherein the modified image has enhanced color intensities over substantially all visible wavelengths.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: September 18, 2012
    Assignee: Essence Security International Ltd.
    Inventors: Haim Amir, Amir Eliaz, Tomer Saar
  • Patent number: 8237863
    Abstract: An adaptive gain and offset control for a digital video analog to digital converter is provided. A gain indicator and/or an offset indicator, which are used as inputs control signals to an analog-to-digital converter, are determined based on a detected maximum level and a detected blanking level from an input video signal. The gain and offset indicators may be determined independently from a minimum level of the video signal.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: August 7, 2012
    Assignee: Huaya Microelectronics
    Inventor: Sheng De Jang
  • Patent number: 8144250
    Abstract: A microcontroller-based video AGC/sync regulator in which the parameters of various synchronizing signals of several different video formats are incorporated into a user program to generate signals to be processed by other sub circuits that correct and reinforce the AGC levels and sync signals of an incoming video signal is disclosed. The microcontroller-based video AGC/sync regulator is synchronized by the selection and isolation of a reference point of particular qualities that distinguishes itself from any other portion of the video signal. The reference points may be singular or plural in nature and are extracted from the video signal by means of a hybrid and specialized circuit or circuits, an auxiliary microcontroller and/or the system microcontroller. The microcontroller-based AGC/sync regulator is readily adapted for use as a decoder/encoder by altering the user program.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: March 27, 2012
    Inventor: John Louis Kotos
  • Patent number: 8035739
    Abstract: In one aspect a transmission system with a transmitter which can be connected to a video source and a receiver linked to the transmitter via at least four circuit pairs, to which receiver a playback device can be connected is provided. Data is usually exchanged digitally between a graphics card in a personal computer and an LCD display module. The personal computer transmits a digital R, G, B video signal to the LCD display module via a special, so-called DVI (Digital Video Interface) cable. This DVI cable is also provided to transmit so-called DDC (Display Data Channel) data, which particularly comprises specification information of the LCD display module. A transmission system is proposed, which simplifies a connection of an LCD display module to a personal computer and with which the DVI cable can be dispensed with.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: October 11, 2011
    Assignee: Eizo GmbH
    Inventor: G√ľnter Gerner
  • Publication number: 20110235758
    Abstract: A receiver circuit includes an analog front-end and a digital processing unit. The analog front-end includes an input for receiving a radio frequency (RF) signal, a first control input for receiving a gain adjustment signal, a second control input for receiving a timing signal, and a signal output for providing a digital intermediate frequency (IF) signal. The analog front-end updates gains of a plurality of gain stages according to the gain adjustment signal and in synchronism with the timing signal. The digital processing unit is configured to produce at least one output signal derived from the digital IF signal. The digital processing unit includes a timing recovery circuit configured to generate the timing signal based on the digital IF signal to control timing of the updating gains of each of the plurality of adjustable gain stages.
    Type: Application
    Filed: May 28, 2010
    Publication date: September 29, 2011
    Applicant: SILICON LABORATORIES, INC.
    Inventors: Ramin Khoini-Poorfard, Alan F. Hendrickson, Alessandro Piovaccari, David S. Trager, Aslamali A. Rafi, Abdulkerim L. Coban, David Le Goff
  • Patent number: 7719724
    Abstract: A first set-value calculating unit calculates a first set value of a black-level feedback based on a reflection amount that increases a speed of tracking to a black-level target value in a black-level feedback control. A second set-value calculating unit calculates a second set value of a black-level feedback based on a reflection amount that slows down a tracking to a black-level target value as compared to the speed of tracking of the first set-value calculating unit. A selecting unit selects and outputs any one of the first set value and the second set value and outputs selected value as a set value. A controlling unit controls selection of any one of the first set value and the second set value by the selecting unit based on the black differential value and a gain of the image data.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: May 18, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Hajime Tsukahara
  • Patent number: 7711241
    Abstract: A short film generation/reproduction apparatus for generating video of a short film using at least one still picture and reproducing such video is comprised of: a picture feature extraction unit 1107 for extracting picture features from an input picture; a picture-to-style feature conversion unit 1115 for converting the picture features into style features; a picture-to-musical feature conversion unit 1118 for converting the picture features into musical features; a style determination unit 1116 for determining a style based on the style features; a music determination unit 1119 for determining a piece of music based on the musical features; and a scenario generation unit 1117 for generating a scenario by using the still picture, music and style.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: May 4, 2010
    Assignee: Panasonic Corporation
    Inventors: Yasuhiro Mori, Ichiro Okabayashi, Masaki Yamauchi, Akihiro Kawabata
  • Patent number: 7557866
    Abstract: An AGC control section (110) has a first operation mode for controlling the gain of a variable gain amplifier (103) to maintain the amplitude of the sync signal measured by a sync signal amplitude measuring circuit (108) at a constant value, and a second operation mode for preventing the gain from being increased even when the amplitude of the sync signal measured by the video signal processing circuit (109) is smaller than the predetermined first reference value and reducing the gain of the variable gain amplifier (103) only when the amplitude of the video signal exceeds a predetermined second reference value. During operation in the first operation mode, when the amplitude of the sync signal is smaller than the predetermined first reference value and the amplitude of the video signal is greater than the predetermined second reference value, the mode is switched to the second operation mode.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: July 7, 2009
    Assignee: Asahi Kasei EMD Corporation
    Inventors: Hideaki Sasahara, Nobuyoshi Ukaji, Ken Ishihara
  • Patent number: 7551238
    Abstract: An integrated tuner comprises a step AGC amplifier (1) that is adjusted only during a vertical synchronization interval. A receiver comprises such an integrated tuner and an IF demodulation circuit (5,6) for providing a vertical sync signal to the integrated tuner.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: June 23, 2009
    Assignee: NXP B.V.
    Inventors: Bruno Pierre Jean-Marie Motte, Robbert Peter Fortuin
  • Patent number: 7532687
    Abstract: A method (500) and an apparatus (300) are presented for processing a signal in a receiver in accordance with Ultra Wideband (UWB) protocol. The received signal is acquired during a first preamble portion (411) of a data frame associated with the UWB protocol. During acquisition a first Automatic Gain Control (AGC) operation (606) is performed associated with a noise component of the signal. A second AGC operation (608) associated with a pulse component of the signal is performed after the acquiring the signal during a second preamble portion (413).
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: May 12, 2009
    Assignee: Freescale Semiconductor, Inc.
    Inventor: Terence L. Johnson
  • Patent number: 7499105
    Abstract: The invention relates to a compensation circuit for filters of a video signal receiver. To compensate a non-linear amplification of a small signal in dependence upon the control of a large signal which is superimposed on the small signal, the invention proposes to detect the control of the large signal and to vary the working point of the filter in dependence upon the control of the large signal. Since the filter amplifies the small signal differently in dependence upon the position of the working point, the non-linearity of the filter can thereby be compensated.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: March 3, 2009
    Assignee: NXP B.V.
    Inventors: Joachim Brilka, Axel Kattner
  • Publication number: 20090027553
    Abstract: An image signal processor and a method for processing an image signal thereof are disclosed. When the image signal processor executes an automatic chroma gain control (ACC), the image signal processor adjusts a variable rate of ACC gain according to a size of an input color signal to reduce a time for processing the ACC. Even if a difference between the size of the input color signal and the size of a reference color signal is large, the ACC is rapidly processed. As a result, transient phenomenon disappears from a screen.
    Type: Application
    Filed: January 17, 2008
    Publication date: January 29, 2009
    Applicant: Samsung Electronics Co., Ltd
    Inventor: Hye-joung Park
  • Patent number: 7443455
    Abstract: A video decoder (10) for receiving an input video signal and producing output signals for a digital display (12), and involving automatic gain control (AGC) functions (20, 28), is disclosed. For each of the front-end and back-end AGC functions (20, 28), the AGC gain value applied is modified according to measurements of several attributes of the video signal, such as sync height, color burst amplitude, composite signal peak amplitude, and luma signal peak amplitude. The measurements are made, and the AGC gains are modified, on a frame-by-frame basis. Preferably, the AGC is modified using the one of the signal attributes that indicates the lowest gain. The back-end AGC function (28) modifies its gain to unity if the front-end AGC function (20) selected the luma signal peak amplitude for modifying its gain. A method for adjusting the rate of change of the AGC gain is also disclosed, in which gain increases are delayed and slowed following an AGC gain decrease because of an image-dependent signal attribute.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: October 28, 2008
    Assignee: Texas Instruments Incorporated
    Inventor: James E. Nave
  • Patent number: 7426250
    Abstract: An automatic gain controller and the controlling method thereof are disclosed. The automatic gain controller includes a first multiplexer for receiving an input signal and a gain and generating a first output, a second multiplexer for receiving a signal time constant and a gain time constant and generating a second output, a filter electrically connected to the first multiplexer and the second multiplexer for generating one of a signal-energy and an actual gain in response to the first output and the second output, a signal-energy processing device electrically connected to the filter, the first multiplexer and the second multiplexer for generating the gain and the gain time constant in response to the signal-energy, and a multiplier electrically connected to the filter for multiplying the actual gain by the input signal to generate an output signal.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: September 16, 2008
    Assignee: Winbond Electronics Corp.
    Inventor: Yueh-Chang Chen
  • Publication number: 20080151114
    Abstract: A microcontroller-based video AGC/sync regulator in which the parameters of various synchronizing signals of several different video formats are incorporated into a user program to generate signals to be processed by other sub circuits that correct and reinforce the AGC levels and sync signals of an incoming video signal is disclosed. The microcontroller-based video AGC/sync regulator is synchronized by the selection and isolation of a reference point of particular qualities that distinguishes itself from any other portion of the video signal. The reference points may be singular or plural in nature and are extracted from the video signal by means of a hybrid and specialized circuit or circuits, an auxiliary microcontroller and/or the system microcontroller. The microcontroller-based AGC/sync regulator is readily adapted for use as a decoder/encoder by altering the user program.
    Type: Application
    Filed: May 29, 2007
    Publication date: June 26, 2008
    Inventor: John Louis Kotos
  • Patent number: 7352406
    Abstract: A television monitor display with video signal processing comprises a source (SM) of a video display signal (Y) including a sync component (S). A video processor (U1) is coupled to process the video display signal (Y). A sync separator (SS) is coupled to generate separated synchronizing signals (Sy) from the sync component (S) of the video display signal (Y). A video amplifier (100) is coupled to the sync separator (SS) and the video processor (U1) and generates an output video signal (Ys+) wherein a sync component (S+) of the output video signal is increased in amplitude in accordance with the separate synchronizing signals (Sy) coupled to the video amplifier (100).
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: April 1, 2008
    Assignee: Thomson Licensing
    Inventors: Thomas David Gurley, Mark Alan Nierzwick, Daniel Lee Reneau
  • Patent number: 7227915
    Abstract: A receiver receives a multiplex broadcasting wave of a terrestrial wave and a satellite wave and executes AGC. As for the terrestrial wave, only a frequency band of the terrestrial wave is extracted by a filter for the terrestrial wave, and the AGC on the terrestrial wave side is executed through an AGC loop for the terrestrial wave. As for the satellite wave, the frequency band including the terrestrial wave and the satellite wave is extracted by the filter for the satellite wave, and the AGC is executed based on the signal. As a result, the AGC on the satellite wave side is affected by a receiving condition variation of the terrestrial wave. By a frequency-analysis of the terrestrial wave signal, the receiving condition of the terrestrial wave is analyzed. According to the analyzed result, an AGC adjusting quantity on the satellite wave side is determined and the AGC on the satellite wave side is adjusted by the adjusting quantity.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: June 5, 2007
    Assignee: Pioneer Corporation
    Inventors: Hiroshi Wakimoto, Tsuyoshi Saka, Hideaki Furukawa
  • Patent number: 7206030
    Abstract: Disclosed are methods and systems for automatic gain control (AGC) in circuits. The disclosed methods and systems provide accurate and rapidly converging automatic gain control suited for video applications. According to disclosed preferred embodiments of the invention, a signal amplitude controlling method is responsive to gain underflow or overflow. A new fine gain control value is extrapolated and a new coarse gain control value is determined. The new fine gain and new coarse gain control values are applied to the signal to produce an output signal within a pre-selected output amplitude range.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: April 17, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: James Edward Nave
  • Patent number: 7117514
    Abstract: A process and network able to restrict a video appliance equipped with either a single tuner or with multiple tuners, from receiving and subsequently displaying video image signals represented by an accompanying broadcast discretionary control data to include a high level of objectional content. A multi-tuner television receiving appliance may be constructed with at least two tuners receiving a program; a viewing restricting portion detecting a discretionary control data of the program received through one of the tuners and blocking AGC signals of the tuner receiving the program when the discretionary control data is greater than a discretionary threshold; a control portion blocking AFT signals of the other tuners when the viewing of the program received the receiving tuner is restricted.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: October 3, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jong-Hee Han
  • Patent number: 6882684
    Abstract: An automatic gain control circuit includes a first portion which calculates a first error amount, and a second portion which calculates a second error amount. Both calculated error amount is sent to a determination module. Further, an integrator integrates an error amount, a difference between a power of an input signal and an average power of an eye pattern for example. The determination determines whether the integrated error amount exceeds a predetermined value or not, and output either of the first error amount and the second error amount based on the determination.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: April 19, 2005
    Assignee: Fujitsu Limited
    Inventors: Takashi Kaku, Hideo Miyazawa
  • Publication number: 20040027483
    Abstract: A television monitor display with video signal processing comprises a source (SM) of a video display signal (Y) including a sync component (S). A video processor (U1) is coupled to process the video display signal (Y). A sync separator (SS) is coupled to generate separated synchronizing signals (Sy) from the sync component (S) of the video display signal (Y). A video amplifier (100) is coupled to the sync separator (SS) and the video processor (U1) and generates an output video signal (Ys+) wherein a sync component (S+) of the output video signal is increased in amplitude in accordance with the separate synchronizing signals (Sy) coupled to the video amplifier (100).
    Type: Application
    Filed: August 7, 2002
    Publication date: February 12, 2004
    Inventors: Thomas David Gurley, Mark Alan Nierzwick, Daniel Lee Reneau
  • Patent number: 6469748
    Abstract: In a video signal capturing apparatus with a simple construction capable of distinguishing fields in units of a color field, a separation circuit separates from input video signals, vertical synchronizing signals that lead fields in a one-to-one relationship. A field counter formed by, for example, a scale-of-four counter, counts the number of vertical synchronizing signals. Based on the count value of the field counter and values set in a register, a timing generating circuit performs data capture in such a manner that color fields are distinguished from each other. If color field 3 is to be captured, a value “3” is set the register. The timing generation circuit compares a count value from the field counter with the set value “13”. When the count value equals 3, the timing generation circuit starts capture of digital video data in the determined field. An even-odd number determining circuit may be provided for distinguishing (i.e.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: October 22, 2002
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Yuji Sato
  • Patent number: 5889421
    Abstract: The present invention relates to a device for detecting the locking of an automatic gain control circuit, the automatic gain control circuit receiving a signal to be regulated, a check signal and a sampling control signal for driving the operation of the circuit. The detection device includes a comparator receiving the check signal and the signal to be regulated or a signal representative of the signal to be regulated. The comparator generates two logic signals, the states of which form a specific combination of logic states when the value of the signal to be regulated is in a range of values including the value of the check signal. A logic comparator circuit generates a logic comparison signal, the state of which is representative of the presence or absence of this specific combination, and a storage means, driven by the sampling control signal, stores the state of the signal provided by the logic circuit.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: March 30, 1999
    Assignee: SGS-Thomson Microelectronics S.A.
    Inventors: Eric Cirot, Nicolas Lebouleux
  • Patent number: 5867222
    Abstract: A video sync slicing circuit is disclosed that employs an adjustable gain control (AGC) amplifier and circuitry that adjusts a gain of the AGC amplifier such that a blanking level of the video signal at an output of the AGC amplifier equals a blanking reference voltage. The slicing circuit includes a circuit that triggers a composite sync signal when a sync pulse of the video signal equals the fifty percent slicing level.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: February 2, 1999
    Assignee: Elantec Semiconductor, Inc.
    Inventors: Robert L. Norris, Bruce D. Rosenthal
  • Patent number: 5841563
    Abstract: A technique for delivering analog video over fiber-to-the-home (FTTH) networks addresses a fundamental problem of the standard signal format, i.e., power budget constraint, by increasing the usable optical signal efficiency. In particular, a technique is provided for transmitting an efficient modified analog video which is compatible with existing receivers. More specifically, the synchronization portion of a standard NTSC video signal is reduced in amplitude during transmission, producing an appreciable increase in the allowable optical modulation index (OMI).
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: November 24, 1998
    Assignee: Bell Communications Research, Inc.
    Inventor: Frank J. Effenberger
  • Patent number: 5767914
    Abstract: In a video frame grabber for digitizing analog video signals which have a pure analog video signal component and a synchronisation signal component, the synchronisation signals are digitized along with the pure analog video signals. Video gain and offset, sync gain, and sync threshold can be adjusted electronically. A variable time delay can be imposed on the sampling clock signals and on horizontal reference signals. Optimal values can be determined for the various parameters.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: June 16, 1998
    Assignee: Agfa-Gevaert N.V.
    Inventors: Jos Jennes, Paul Wouters, Paul Canters, Herman Van Goubergen, Geert Debeerst
  • Patent number: 5489946
    Abstract: A synchronization (sync) separation system and method quickly and accurately generate a sync signal from an analog video signal by using feedback control. The system comprises a voltage generator for generating first and second reference voltages V.sub.REF1, V.sub.REF2. A first comparator compares the analog video signal to the first reference voltage V.sub.REF1 and generates a shift control signal, A voltage shift mechanism receives the shift control signal and adjusts the analog video signal so that the sync level of the analog video signal converges toward the first reference voltage V.sub.REF1. A second comparator compares the analog video signal with the second reference voltage V.sub.REF2 and generates the sync signal indicative of when the analog video signal exhibits the sync level. Preferably, the voltage shift mechanism introduces a continuous current i.sub.c into the analog video signal.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: February 6, 1996
    Assignee: Hewlett-Packard Company
    Inventors: Steven J. Kommrusch, Bradly J. Foster
  • Patent number: 5459526
    Abstract: An image signal processing apparatus wherein image signals of plural kinds transmitted in different TV systems can selectively be reproduced, to provide an image signal processing apparatus wherein image signals of plural kinds transmitted in different systems can selectively be reproduced with simple construction, high cost-effectiveness, and high practicability. The apparatus has a sync signal generating unit for performing arithmetic operation processing for extracting a sync signal component from an input image signal, by changing a processing program in accordance with a transmission system of the input image signal, and a decoding unit for decoding the input image signal on the basis of a sync signal generated by the sync signal generating unit.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: October 17, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masahiro Yamada
  • Patent number: 5416524
    Abstract: A digital television signal includes data sent as multilevel symbols in successive data segments each including a synchronizing sync character. The detected synchronizing sync character produces a characteristic having two opposite polarity levels separated by a zero reference level, with the levels occurring at successive sampling points of the television signal, and a detection signal that has a peak occurring in time coincidence with the zero reference level. The detection signal controls sampling of the received television signal. The gain of the received signal is controlled by an AGC circuit that also responds to the detection signal.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: May 16, 1995
    Assignee: Zenith Electronics Corp.
    Inventors: Richard W. Citta, Dennis M. Mutzabaugh, Gary J. Sgrignoli
  • Patent number: 5325183
    Abstract: An OSD circuit for displaying advertising picture data on the screen of a television receiver is disclosed, and the circuit includes: an oscillator, a first counter, a second counter, a third counter, an F/F circuit, a ROM, and automatic color adjusting circuitry. The oscillator supplies clock signals to the first counter, and the first and second counters supplies horizontal and vertical scanning addresses to the ROM so as for the advertising picture data to be outputted from the ROM. The third counter, supplies a delay signal for displaying of an advertising picture data of a picture scene at a time, thereby inhibiting the output of the ROM for a certain period of time. The F/F circuit prevents a dual display of the advertising picture on the screen, and the ROM stores the advertising picture data separately for main color data, first sub-color data, second sub-color data and brightness data.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: June 28, 1994
    Assignee: Samsung Co., Ltd.
    Inventor: Pil G. Rhee