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7599003 |
Data slicer, data slicing method, and amplitude evaluation value setting method
A data slicer 300 includes a slice level calculation unit 310 that determines whether a detected digital video signal is a CRI signal on the basis of the amplitude of the signal, and sets a...
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7555066 |
E8-VSB reception system
An E8-VSB reception system system is provided. A VSB receiver converts a received broadcast signal into a digital baseband signal in synchronization with a first symbol clock, converts a decision...
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7554609 |
Method and apparatus for detecting and rejecting NTSC Interference in ATSC system
A method and apparatus for rejecting an interference signal from an input frequency spectrum. The method includes the steps of receiving the input signal; frequency-shifting the received input...
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7405770 |
Adaptive equalization method and system for reducing noise and distortion in a sampled video signal
An adaptive equalization method and system for reducing noise and distortion in a sampled video signal improves the quality of output video information in both consumer and professional...
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7375741 |
Circuit and method for eliminating image interfering with desired channel
A circuit and a method for eliminating interference introduced from an image channel into a desired channel is described. The circuit includes a splitter and an adder. The splitter generates...
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7359474 |
Clock recovery circuit and clock-recovering filter circuit
There is provided a clock-recovering filter circuit for use in a clock recovery circuit that generates a recovery clock signal from input data from an external device and a reference clock signal....
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7359437 |
Encoding method and system for reducing inter-symbol interference effects in transmission over a serial link
A communication system including a transmitter, a receiver, and a serial link, in which encoded data (e.g., encoded video data and encoded auxiliary data) are transmitted from the transmitter to...
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7346356 |
Method and communication unit for use in a wideband wireless communications system
A technique is used in a wideband wireless communication system ( 100 ). In some embodiments available channels are determined ( 310 ) and one is selected ( 315 ) for assignment to each of a set of...
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7313208 |
Pre-equalization for low-cost DTV translators
A low cost DTV translator, which translates an incoming signal on channel A to an outgoing signal on channel B, includes a transmitter pre-equalizer whose taps are configured with tap values that...
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7312833 |
Channel equalizing apparatus and method for digital television receiver
Disclosed is a channel equalizing apparatus and method for a digital television receiver that performs channel equalization using equalizing algorithms. The channel equalizing apparatus includes a...
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7307665 |
Method and system for generating reference signals with improved correlation characteristics for accurate time of arrival or position determination
The present invention provides a method and system for generating reference signals that, when correlated with synchronization code signals or other components of broadcast TV signals, yield...
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7098960 |
Data slicer, data slicing method, and amplitude evaluation value setting method
A data slicer 300 includes a slice level calculation unit 310 that determines whether a detected digital video signal is a CRI signal on the basis of the amplitude of the signal, and sets a...
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7015981 |
Television signal transmitter capable of eliminating occurrence of adverse influences caused by interference signals
A television signal transmitter is arranged by a first frequency converter for up-converting an input signal into an intermediate frequency signal, and a second frequency converter for...
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7015979 |
Noisy edge removal for video transmission
A method for removing noise from a video input, prior to encoding includes receiving a frame of a video signal, identifying noise within the frame, and eliminating the noise from the frame. The...
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6999634 |
Spatio-temporal joint filter for noise reduction
A spatio-temporal joint filter and a spatial joint filter for noise reduction are disclosed. The spatio-temporal joint filter includes a spatial joint filter including the first and second sub...
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6839433 |
Method and apparatus for generating a signal that defeats illegal cable decoders
Illegal cable decoders, i.e., black boxes, are defeated by adding, inserting and/or superimposing an added signal onto an already scrambled video signal, which added signal is capable of disrupting...
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6822625 |
Image processing device
Picture processing apparatus has a pixel judgment circuit and a pixel correction circuit. The pixel judgment circuit includes a target pixel detection circuit for detecting a target pixel having a...
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6816203 |
Method and apparatus for isolating noise from a tuner in a television signal receiver
An apparatus ( 100 ) for isolating a noise intolerant device ( 110 ) from a source of noise includes a digital bus ( 104/105 ). A processor ( 101 ) outputs clock signals and first data signals and...
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6807676 |
Methods of formatting data to maximize the readability and the amount of song identification information displayed on a limited number of lines
A method of formatting data to maximize the readability of song identification (ID) information displayed on a monitor screen and a method of formatting data to maximize the amount of song ID...
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6795588 |
Noise detector, noise detection method, signal processor and signal processing method
A ringing detector detects mosquito noise and ringing for outputting an image signal smoothed by a horizontal/vertical high-pass filter when mosquito noise and ringing are detected while outputting...
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6760078 |
Digital filtering of DTV I-F signal to avoid low-end boost of the baseband signal resulting from in-phase synchrodyne
In a radio receiver for digital television signals a digital filter supplies the in-phase synchrodyning circuitry a shaped spectral response to the digitized I-F signal. The...
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6744474 |
Recursive metric for NTSC interference rejection in the ATSC-HDTV trellis decoder
In a system for receiving a signal containing digital data representing HDTV image information in the form of multilevel symbols formatted into groups of successive fields, each field comprising a...
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6665019 |
Method and apparatus for spread spectrum clocking of digital video
In accordance with one embodiment of the invention a spread spectrum pixel clock signal is generated to spread out the frequency bandwidth within which the peak emission of an electromagnetic...
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6556249 |
Jitter cancellation technique for video clock recovery circuitry
A method and apparatus for compensating for time base or phase errors in video and audio signals that are separately stored or processed. A ring oscillator provides a plurality of clock signals,...
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6519007 |
Video data transmitting method
A video data transmitting method fortransmittin a video data from a transmitter to a receiver comprises the steps of dividing one screenful of video data into specified rectangular areas,...
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6480233 |
NTSC co-channel interference detectors responsive to received Q-channel signals in digital TV signal receivers
An NTSC co-channel interference detector ( 44 ) detects the presence of an interfering NTSC signal in the received Q-channel signal that is orthogonal to the received I-channel signal, rather than...
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6456316 |
Apparatus for judging if co-channel interference exists in digital TV receiver
An apparatus for judging if a co-channel interference exists in a digital TV receiver is disclosed. The TV receiver includes a comb filter for removing NTSC interference of input data, and a...
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6449002 |
Truncated metric for NTSC interference rejection in the ATSC-HDTV trellis decoder
In a system for receiving a signal containing digital data representing HDTV image information in the form of multilevel symbols formatted into groups of successive fields, each field comprising a...
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6426780 |
DTV receiver with low-band final I-F signal filtered for suppressing co-channel interfering NTSC audio carrier
A digital television receiver converts very-high-frequency intermediate-frequency digital television signal to a band with uppermost frequency in the lower portion of the high-frequency range. This...
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6388701 |
Device and method for removing co-channel interference signal in modulation/demodulation receiver having reference signal
A modulation/demodulation receiver having a reference signal in a digital communication system. A method for signal processing and co-channel interference signal removal in the receiver includes...
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6339450 |
Error resilient transcoding for video over wireless channels
A method and system for maintaining the quality of video transported over wireless channels uses a transcoder to modify and maintain the optical resilience of an encoded bitstream. The transcoder...
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6335767 |
Broadcast transmission system with distributed correction
A transmission system ( 14 ) broadcasts an information signal. Within the system ( 14 ), several components (e.g., 20-24 ) cause distortion to the information signal as the signal is processed and...
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6335766 |
System and method for transmitting advanced television signals
A system and method for transmitting advanced television signals such as digital television signals. The system and method controls the frequency of the RF signal by compensating for errors in the...
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6333767 |
Radio receivers for receiving both VSB and QAM digital television signals with carriers offset by 2.69 MHz
A radio receiver uses the same tuner for receiving a selected digital television (DTV) signal, irrespective of whether it is a quadrature-amplitude-modulation (QAM) or a vestigial sideband (VSB)...
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6285412 |
Adaptive pre-equalization apparatus for correcting linear distortion of a non-ideal data transmission system
An adaptive apparatus (10) for compensating a linear distorting action to an information signal within a non-ideal transmission system (12). Within the system (12), an information signal proceeds...
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6281935 |
System and method for controlling a transmitter frequency
A system and method for controlling the frequency of a signal being transmitted wherein the frequency of the signal received at the transmitter site is error corrected before being broadcast. The...
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6266096 |
Digital encoding method and apparatus for replacing part of the data signal with synthetically generated amplitude values
For a method of encoding digital data of arbitrary data rates of at least one data signal for jointly transmitting the encoded data with a digital picture signal, as well as a data encoder for such...
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6201563 |
Trellis code modulation decoder structure for advanced digital television receiver
An ATV receiver is provided with a 16-state trellis decoder to achieve improved performance in the presence of NTSC co-channel interference. In one embodiment, the ATV receiver comprises a tuner, a...
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RE36980 |
Partial response trellis decoder for high definition television (HDTV) system
A partial response Trellis decoder that performs Trellis coded modulation in a high definition television (HDTV) having a specific and detailed configuration and includes a distance mapper for...
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6057877 |
NTSC interference detectors using pairs of comb filters with zero-frequency responses, as for DTV receivers
A first comb filter differentially combines an I- or Q-channel baseband signal supplied as input signal to a co-channel NTSC interference detector for a DTV receiver with that signal as subjected...
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5923374 |
Method and apparatus for reduced-bandwidth transmission of television signals
A system for reducing bandwidth of video signals. Ordinarily, an NTSC (National Television Standards Committee) video signal has (a) a bandwidth of 6.0 MHz, (b) chrominance and luminance carriers...
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5894334 |
Carrier recovery system for a vestigial sideband signal
A television signal receiver for processing an HDTV signal transmitted in a vestigial sideband (VSB) format includes input complex filters shared by a timing recovery network (30) and a carrier...
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5878086 |
Method and apparatus for producing a deterministic sequence from an IIR filter
A method and apparatus for improved interference rejection, where the rejection is being accomplished by an IIR filter at the transmitter with complementary characteristics to an FIR filter of the...
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5859664 |
Method and apparatus for line or frame-synchronous frequency hopping of video transmissions
A method and apparatus for transmitting and receiving frequency hopped video signals is disclosed. A composite video signal is processed at a transmission end to remove line and frame...
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5844478 |
Program specific information formation for digital data processing
Program specific information (PSI) is formed suitable for use in recovering data content of a program in the form of a packetized datastream. Packet identifiers (PIDs) that identify individual...
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5828404 |
VSB mode detection system with comb filter
A VSB mode detection circuit with a comb filter solves the potential problem of lockout in a situation where an 8 VSB mode signal is being received, with the comb filter being effective, and a...
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5825435 |
Color cathrode ray tube and display device
By selecting the number of apertures per vertical row in the shadow mask of a color cathode ray tube to be in the range between 615 and 650, such a cathode ray tube can be used both in a PAL, an...
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5821988 |
NTSC co-channel interference reduction system
A digital television receiver operating in the presence of an NTSC co-channel signal includes an NTSC rejection filter that is selectively inserted in the digital television signal path to minimize...
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5793417 |
Apparatus and method of controlling driving selection of NTSC rejection filter
When both an NTSC signal and an ATV signal are concurrently broadcast in a co-channel, it is desirable to remove the NTSC signal at the receiver when reproducing the broadcast ATV signal, since the...
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5757436 |
Image processor system
An image-processor system for compensating for accumulated phase-and-gain errors incurred during transmission of a video signal over a communications channel. The image-processor system comprises...
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