Patents Represented by Attorney Paul J. Rasmussen
  • Patent number: 4785349
    Abstract: 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 coding methods specific to each region. Region decoding time estimates are made to optimize compression thresholds. Region descriptive codes conveying the size and locations of the regions are grouped together in a first segment of a data stream. Region fill codes conveying pixel amplitude indications for the regions are grouped together according to fill code type and placed in other segments of the data stream. The data stream segments are individually variable length coded according to their respective statistical distributions and formatted to form data frames.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: November 15, 1988
    Assignee: Technology Inc. 64
    Inventors: John M. Keith, Stuart J. Golin, Allen H. Simon, Brian Astle
  • Patent number: 4783756
    Abstract: 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 between the system input and output signals and applies them to an Infinite Impulse Response filter. The filtered differences are scaled and coupled to the first and second adders. The system transfer function H(Z) is given byH(Z)=[1+(Z+1)/(1+1/A)K]/1+(Z-1)/(1+A)K]wherein A is a treble control variable applied to the multiplier, K is a scaling constant and Z is the conventional Z-transform variable.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: November 8, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Todd J. Christopher
  • Patent number: 4783849
    Abstract: The RF stage and local oscillator stage of a tuner both include respective cascode connected dual gate field effect transistors as the amplifying device and similarly configured tuned circuits coupled to the first gate electrodes of the field effect transistors. The tracking characteristics of the tuner are enhanced due to the similar amplifier and tuned circuit configurations.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: November 8, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Max W. Muterspaugh
  • Patent number: 4783698
    Abstract: 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 interpolator calculates the difference between adjoining pixels in horizontally compressed video data from the vertical interpolator, divides the difference by the horizontal compression ratio and accumulates the divided differences during line trace intervals to recover de-compressed video data.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: November 8, 1988
    Assignee: Technology Inc., 64
    Inventor: Kevin Harney
  • Patent number: 4782383
    Abstract: In a system for encoding a widescreen video signal containing left side, right side and center panel image components and luminance (Y) and chrominance (I,Q) information, first and second encoded signals containing side panel high frequency components ("highs") are generated simultaneously for each horizontal image line. Left and right chrominance side panel highs I.sub.L, I.sub.R and Q.sub.L, Q.sub.R remain in their respective horizontal spatial positions in the first and second signals. Left and right luminance side panel highs Y.sub.L, Y.sub.R are time expanded and spatially shifted to fill the gap between the chrominance highs in the first and second signals. Thus the first signal contains the side panel highs in the sequence I.sub.L,Y.sub.L,I.sub.R, and the second signal contains the side panel highs in the pattern Q.sub.L,Y.sub.R,Q.sub.R.
    Type: Grant
    Filed: August 26, 1987
    Date of Patent: November 1, 1988
    Assignee: General Electric Company
    Inventor: Michael A. Isnardi
  • Patent number: 4782389
    Abstract: 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 with samples having a predetermined value in response to the control signal. A sorter receives the resulting masked samples and produces an ordered set of samples in rank order. Sample selecting means coupled to the output of the sorter provides an output sample from the location in the ordered set of samples corresponding to the desired M-tile, in response to the control signal.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: November 1, 1988
    Assignee: RCA Licensing Corporation
    Inventor: William T. Mayweather, III
  • Patent number: 4782391
    Abstract: 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, responsive to the skew-shifted clock, develops digital samples representative of the auxiliary video signal. A clock transfer circuit, responsive to the line-locked and skew-shifted clocks, translates digital samples occurring synchronously with the skew-shifted clock signal to digital samples occurring synchronously with the line-locked clock signal. The digital samples occurring synchronously with the line-locked clock signal are stored in a memory.
    Type: Grant
    Filed: August 19, 1987
    Date of Patent: November 1, 1988
    Assignee: RCA Licensing Corporation
    Inventors: David L. McNeely, Donald H. Willis
  • Patent number: 4777851
    Abstract: 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 aperture locating cam surfaces in a given orientation and spacing. The cam rods are in the same orientation and spacing as the cam surfaces and when engaged align the screw insertion device with the screw aperture. After alignment, a screwdriver attached to the three-stage system drives the screw into the aperture. An automatic feed system feeds screws to the insertion device. A plurality of such three-stage systems are used for automatically attaching an apparatus to the cabinet.
    Type: Grant
    Filed: October 2, 1986
    Date of Patent: October 18, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Nicholas F. Gubitose
  • Patent number: 4777385
    Abstract: 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 distant from the input of the delay line to an output terminal to effectively hold the initial value of the transition for approximately half the transition period. The taps at the input end of the delay line up to and including the center tap are then sequentially coupled to the output terminal to effectively advance, in time, the end value of the signal transition. The signal transition is thereby reduced to a time equivalent to the switching interval between taps.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: October 11, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Werner N. Hartmeier
  • Patent number: 4777481
    Abstract: 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 area as luminance pixels. Subsamples describing chrominance pixels of greater size are time-division-multiplexed with samples describing pixels in the image memory output when the former type of processing is done. Whichever format for video data is currently being used, the channel for reading subsamples from image memory to the display processor is used to transmit flag data controlling the mode of processing of video data performed by the video processor.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: October 11, 1988
    Assignee: Technology Inc. 64
    Inventor: Thomas R. Craver
  • Patent number: 4775842
    Abstract: A feedback amplifier for providing an amplified signal to first and second utilization networks includes first and second feedback paths. The amplifier output is coupled via a first coupling resistor to a first terminal to which the first utilization network is connected, and via a second coupling resistor to a second terminal to which the second utilization network is subject to being connected. The first feedback path couples the amplifier output to the amplifier input exclusive of the first coupling resistor. The second feedback path couples the amplifier output to the amplifier input and includes the second coupling resistor. The amplifier output signal remains substantially constant in the presence or absence of said second utilization network.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: October 4, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Mark F. Rumreich
  • Patent number: 4776038
    Abstract: A television receiver cable of tuning either "air" channels in an "air" tuning mode or "cable" channels in a "cable" tuning mode includes apparatus for automatically selecting the tuning mode. The auto-tuning mode apparatus operates in conjunction with apparatus for automatically programming a memory for storing tuning information for tunable channels. When the auto-programming mode is selected, the receiver is caused to operate in the cable tuning mode and a search is conducted for active cable channels. If a predetermined number of active cable channels is located, the receiver remains in the cable tuning mode and the memory is programmed with tuning information for all of the cable channels. If the predetermined number of cable channels is not located, the receiver is caused to operate in the air tuning mode and the memory is programmed with tuning information for all of the air channels.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: October 4, 1988
    Assignee: RCA Licensing Corporation
    Inventors: William J. Testin, John F. Teskey
  • Patent number: 4774581
    Abstract: 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 adds a value N to a stored value, modulo M, to obtain a new stored value. Samples are read from the memory only when an overflow condition is detected in the accumulator. The four most significant bits of the value held by the accumulator are also used to develop interpolation factors which are used to combine successive sample values provided by the memory to develop interpolated sample values which are used to produce the enlarged image. The image is increased in size by a factor of M/N relative to an unmagnified image.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: September 27, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Shinichi Shiratsuchi
  • Patent number: 4774686
    Abstract: 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 the arithmetic element. Input registers of one arithmetic element may merge with output registers of the preceding arithmetic element. Ones of the registers include a serially coupled latch which is selectively controlled to pass serial sample bits or to replicate the sign bit. The respective registers are clocked with one of two clock signals having different numbers of pulses per sample period and the length of the respective registers are selected so that at the terminus of each sample period the bits of each sample in the processing system are appropriately justified.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: September 27, 1988
    Assignee: RCA Licensing Corporation
    Inventors: Dennis R. McClary, Charles B. Dieterich
  • Patent number: 4772937
    Abstract: 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 predetermined edge of every incoming horizontal sync signal pulse IHSSP to provide skew data representative of the timing or phase offset between the clock signal MCS and the incoming horizontal sync signal IHSS at the start of each new line of picture information.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: September 20, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Eric D. Romesburg
  • Patent number: 4769708
    Abstract: In a television receiver, a contrast control signal for controlling the amplitude of a video signal is a function of a manual contrast control component provided by a viewer, and an automatic contrast control component provided by a light sensitive circuit responsive to ambient light conditions. A "soft" limiter limits the value of the extinguished due to excessive video signal attenuation in response to the control signal. The manual control component is provided by means including a duty cycle control device such as a binary rate multiplier or pulse width modulator.
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: September 6, 1988
    Assignee: RCA Licensing Corporation
    Inventor: John W. Stoughton
  • Patent number: 4769703
    Abstract: Apparatus to permit service adjustment of a television receiver includes a microprocessor which normally controls parameters of a video signal processed by the receiver. The microprocessor also automatically establishes a desired video signal reference condition for the service mode when manual service controls are to be adjusted. The service mode is entered by pressing a designated microprocessor keyboard key while plugging the receiver into a source of primary AC power.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: September 6, 1988
    Assignee: RCA Licensing Corporation
    Inventors: Gary T. Osborne, Warren C. DeVilbiss
  • Patent number: 4769691
    Abstract: A burst locked phase locked loop (PLL) includes a relatively wide-band voltage controlled oscillator. This PLL may erroneously lock at a frequency which differs form the frequency of burst by an amount equal to the horizontal line frequency. To prevent this side-locking condition, the PLL includes circuitry which changes the frequency of the signal produced by the VCO when the number of cycles of the signal provided by the PLL during one horizontal line interval corresponds to the number which would be obtained in a side-lock condition.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: September 6, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Robert A. Dischert
  • Patent number: 4769714
    Abstract: A low pass filter is placed between an input pre-driver amplifier and an output driver amplifier of a display driver stage, e.g., forming a cascode amplifier. The filter suppresses noise components present in the signal from the pre-driver to prevent the noise components from being amplified and radiated by the output driver amplifier. The filter also suppresses high frequency arc currents before reaching the pre-driver amplifier.
    Type: Grant
    Filed: October 24, 1986
    Date of Patent: September 6, 1988
    Assignee: RCA Licensing Corporation
    Inventor: Gary T. Osborne
  • Patent number: 4767949
    Abstract: A multibit digital threshold comparator is disclosed which comprises a source of a multibit digital input signal representing a signed arithmetic value, and a source of a threshold signal. Means are provided for producing a magnitude representative signal. The magnitude representative signal produced has either the value of the input signal or that of the ones complement of the input signal depending upon the sign of the value of the input signal. A comparator compares the magnitude representative signal to the threshold signal. The comparator performs one of two comparisons depending upon the sign of the value of the input signal. First, if the value of the input signal is of a first sign, then the comparator produces a signal having a first state if the value of the magnitude representative signal is greater than the value of the threshold signal.
    Type: Grant
    Filed: May 1, 1987
    Date of Patent: August 30, 1988
    Assignee: RCA Licensing Corporation
    Inventor: William T. Mayweather, III