U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."

Napoleon Bonaparte ; When told of the Robert Fulton steamboat

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 348/193 - Signal to noise ratio


Subclass of Class 348 - Television
Definition: Subject matter wherein the testing includes a signal to
No. of patents: 67
Last issue date: 09/20/2011


1    
NumberTitleIssue Date
8022991Massively-parallel three-axis stabilization of focal plane data
A system and method for three-axis stabilization of focal plane data. The system and method include performing a two-dimensional vertical shear transformation and a two-dimensional horizontal shear transformation. The system and method further incorporate a SIMD com...
09/20/2011
7324167High-quality twisted-pair transmission line system for high-resolution video
A system comprising a first filter having an input and an output adapted to compensate for the characteristics of a first length of twisted-pair wire is disclosed. A first bypass path has an input and an output for bypassing the first filter. A second filter has an ...
01/29/2008
7298396Apparatus and method for monitoring transmission systems using embedded test signals
A monitoring system for an RF transmission system, such as a multi-channel television broadcasting antenna feed system, gathers data about the physical and electrical condition of the RF transmission system in real time. The system can detect and localize deteriorat...
11/20/2007
7259779Automatic assessment of de-interlaced video quality
Assessment of de-interlaced video quality is determined automatically by de-interlacing interlaced video content using a reference de-interlacer and a test de-interlacer. The reference de-interlacer produces a result of known quality and the test de-interlacer is on...
08/21/2007
7209632Digital broadcast recording/viewing support apparatus
A receive part demodulates and decodes a digital modulated signal obtained by receiving a digital broadcast to generate a transport stream, and extracts data-broadcast data transmitted over a data channel. An electronic program list generator generates, from program...
04/24/2007
7199819Device for automatically detecting picture degradation
Feature quantities of a transmitted picture and a received picture are extracted from a first and second block-by-block feature quantity extraction parts which are provided on a transmitting and receiving sides, respectively. The extracted feature quantities are tra...
04/03/2007
7193598 Noise suppressing method for switching on/off flat panel display
A noise suppressing method for switching on/off a flat panel display. A signal detect circuit and a video signal processor are embedded in a time controller IC. At the switch-on transient, the signal detect circuit functions to detect whether the signal is stable. W...
03/20/2007
7173947Methods and apparatus to evaluate statistical remultiplexer performance
The present invention relates to methods and apparatus for quantitatively measuring the performance of a statistical remultiplexer. The methods of the present invention provide for generation of evaluation metrics associated with at least one of amount of bit rate r...
02/06/2007
7170861Distributed device identifier numbering and total device counting algorithm with smart time division multiplexed serial port
A distributed method and apparatus for assigning a unique identifier number to devices connected in a sequential fashion and determining a total device count is presented. Additionally, a method and apparatus for enabling the support of a variable number and type of...
01/30/2007
7162731Radio frequency characterization of cable plant and corresponding calibration of communication equipment communicating via the cable plant
A switch router and one or more gateways incorporating a diagnostic and calibration system that performs RF characterization of an underlying cable plant. The switch router is connected at a point of insertion or point of distribution and each gateway is located dow...
01/09/2007
7086738Optical projection system and method
An optical projection system has a parallel light source for producing a parallel light beam. A first color splitter splits the parallel light beam into a first color beam and a color mixing beam. The color mixing beam includes a second color beam and a third color ...
08/08/2006
7086083Noise measurement system
A method of determining noise in a CATV channel, wherein the CATV channel comprises a predetermined frequency band, that employs digital signal processing to isolate the noise signal from an in-service television signal. The method includes an initial step of obtain...
08/01/2006
7038710Method and apparatus for measuring the quality of video data
The present invention relates to a method and apparatus for generating a model used to estimate the quality of input-video data. The apparatus is configured to obtain a plurality of average subjective scores from a plurality of sample video data, and a plurality of ...
05/02/2006
7038669System and method for providing a reference video signal
A method is taught for providing a reference video signal to a video display through a video interface from a video display adapter for a host computer. The method includes the step of providing a horizontal sync line to carry a horizontal sync signal that occupies ...
05/02/2006
7015973Method and apparatus for generating coast signal for image processing
A method and an apparatus for generating a coast signal for enabling or disabling a phase comparator in a phase-locked loop of image processing apparatus. The phase-locked loop generates a sampling clock signal, which is used to convert an analog image signal into a...
03/21/2006
7015947Measurement of performance of communications systems
The subjective quality of an audio-visual stimulus is measured by measuring the actual synchronisation errors between the audio and visual elements of the stimulus, identifying characteristics of audio and visual cues in the stimulus, and generating a measure of sub...
03/21/2006
6992697Method and apparatus to measure video quality on any display device with any image size starting from a know display type and size
A method of measuring the video quality on display devices of differing types and/or sizes based on a known display type and size, said method includes the steps of: (a) obtaining a subjective quality score of video sequences viewed on a first display device; (b) ob...
01/31/2006
6982745Antenna level display device and method, and receiving apparatus
An antenna level display device capable of faithfully reflecting any deterioration of a picture quality in receiving a satellite broadcast. In this display device, orthogonal detection of an input signal is executed in a demodulator, and a CN ratio is calculated fro...
01/03/2006
6978476Device and method of determining location of signal ingress
The present invention comprises a device which may be attached to a cable ground block (62) such that the level and type for signal emitted through the upstream flow of the signal, from a residence or business (59), may be determined along with the loc...
12/20/2005
6950124Transport stream packet map display
The invention provides technology to generate a graphical depiction on a video display device (VDD) for a stream of packets. Such a graphical depiction can take the form of a matrix of geometric shapes, e.g., squares, each geometric shape representing a packet. Each...
09/27/2005
6943828Method and apparatus for providing adaptive horizontal sync detection
A method and apparatus for providing adaptive horizontal synchronization (sync) signal detection to identify whether a high quality television signal is being received by a television set. The method determines whether no signal is applied, whether a weak signal is ...
09/13/2005
6943827Apparatus for monitoring quality of picture in transmission
A first characteristic value extracting unit extracts a characteristic value from a picture transmitted from a transmission side, and a second characteristic value extracting unit extracts a characteristic value from a picture received on a reception side. These ext...
09/13/2005
6917389Linearization compensation system of digital TV relay apparatus and method thereof
A linear compensation system of a digital TV relay or other apparatus preferably includes a transmitting unit configured to modulate a data to an intermediate frequency (IF) signal, up convert the IF signal to an RF signal, and amplify the RF signal to a predetermin...
07/12/2005
6847395Digital television signal test equipment
The invention, in part, provides an integrated digital television (DTV) diagnostic instrument comprising: at least one of a video display device (VDD) and an audio display device (AudDD); DTV circuitry (AV) to receive a DTV signal, to reconstruct at least one of a v...
01/25/2005
6795580Picture quality measurement using blockiness
A picture quality measurement technique using blockiness provides realtime analysis without the use of a reference signal. A field/frame of an image represented by a processed video signal is captured in a bit-map for analysis. The image is filtered to enhance edges...
09/21/2004
6772437Cable modems and systems and methods for identification of a noise signal source on a cable network
Cable modems are provided for measuring a noise signal power level on the upstream side of the cable network. The cable modem may be configured to make the signal power measurements at a variety of frequencies and at a selected bandwidth during a specified test time...
08/03/2004
6769133Termination circuitry for dual forward and reverse test points for amplifiers
A communication system (100) processes forward signals generated by headend equipment (105) and reverse signals generated by subscriber equipment (135). A communication medium (110, 120), such as fiber optic cable or coaxial cable, connec...
07/27/2004
6728968Upward-joining-noise decreasing method and apparatus
A method for decreasing upward-joining-noise in an upward-signal-inputting position of a center device includes the steps of: measuring a noise level of each of a plurality of upward signals supplied from a plurality of transmission lines; determining whether the me...
04/27/2004
6687907Prevention of broadband cable service theft
Detecting tampering of an incoming cable to which a network interface unit (NIU) is connected by testing for the reflected signal that is present when the signal being transmitted to the head end is not connected to a properly terminated coaxial cable. In...
02/03/2004
6603505Device for objectively evaluating the quality of a digital transmitted picture
A device for objectively evaluating the quality of a digitally transmitted picture. This device compresses encoded pictures x1 and x2 transmitted on two links that are decoded by a first decoder and a second decoder. A variance value ς2 (x1) o...
08/05/2003
6600515Pulsed leakage tagging signal
A method of transmitting a leakage tagging signal includes inserting a tagging signal into a CATV television signal only during portions of the television signal in which control information is present. A method according to the present invention is a met...
07/29/2003
6574797Method and apparatus for locating a cleaner bandwidth in a frequency channel for data transmission
Apparatus, methods, and computer program products for utilizing a frequency channel determined to be unacceptably noisy by finding a cleaner, narrower bandwidth within the frequency channel. Initially data is received on a frequency channel at a CMTS, spe...
06/03/2003
6574796Fast and reliable data carrier detection by a cable modem in a cable television plant
Apparatus, methods, and computer program products are disclosed for detecting or locating a viable data carrier in a downstream channel by a cable modem. When a cable modem is first installed by a cable operator or powered up by a user, it must first loca...
06/03/2003
6567987Digital optical transmitter with improved noise power ratio
A cable television system (400) includes a transmitter (200) for generating a digital optical signal (204) and a receiver (300) for receiving said digital optical signal and converting it to an analog signal. The transmitter (200) includes a processor (23...
05/20/2003
6496221In-service video quality measurement system utilizing an arbitrary bandwidth ancillary data channel
An apparatus for measuring the quality of a video transmission or storage system when the input and output of the system may be spatially separated, when the apparatus might not have a priori knowledge of the input video, and when there exists an ancillar...
12/17/2002
6441847Method for determining the quality of a video and/or television image signal
The invention concerns a method for determining the quality of a video and/or television image signal. In diversity reception installations comprising several receivers, it is necessary to establish a criterion for assessing the reception signals, so as t...
08/27/2002
6425132Ingress testing of CATV system utilizing remote selection of CATV node
A CATV system in which a technician in the field requests via a field client that a node of the CATV system be tested for ingress. The CATV system includes a headend facility that is coupled to a CATV distribution network. The CATV distribution network in...
07/23/2002
6400400Method and apparatus for automated testing of a video decoder
An apparatus and concomitant method for creating and applying an encoded bitstream to evaluate the performance of a black box video decoder. The encoded bitstreams are designed such that the results from the DUT can be evaluated without the need of a huma...
06/04/2002
6356302Apparatus for measuring S/N ratio of composite video signal
An S/N ratio measuring method of a video signal which is suitable for the formation of an IC and can precisely detect a fluctuation of an S/N ratio of a video signal at high response speed while suppressing the total cost and a system based on this method...
03/12/2002
6337710Graphical video editing system for regeneration of bitstreams
A graphical video editing system that allows manipulation of images for input to the video encoding and decoding process. The debugging of video encoders and decoders is aided by user controlled editing of problem areas in test images, and the graphical v...
01/08/2002
1    
 
Sign InRegister
Username  
Password   
forgot password?