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Class 348/471 - Including pulse modulation of video signal (e.g., pulse width, PAM)


Subclass of Class 348 - Television
Definition: Subject matter wherein the video signal is encoded using
No. of patents: 44
Last issue date: 10/17/2006


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NumberTitleIssue Date
7124221Low latency multi-level communication interface
A memory system uses multiple pulse amplitude modulation (multi-PAM) output drivers and receivers to send and receive multi-PAM sigsnals. A multi-PAM signal has more than two voltage levels, with each data interval now transmitting a “symbol” at one of the valid...
10/17/2006
7072406Serial interface and method for transferring digital data over a serial interface
A digital serial interface connects a transmitting device with a receiving device for communicating both data bits and synchronization signals via the serial interface. The transmitting device include a primary transmitter for converting a serial sequence of the dat...
07/04/2006
6974054Service station leak detection with recovery system
A fueling environment distributes fuel from a fuel supply to fuel dispensers in a daisy chain arrangement with a double-walled piping system. Fuel leaks that occur within the double-walled piping system are returned to the underground storage tank or a sump proximat...
12/13/2005
6962269Service station leak detection and recovery system
A fueling environment that distributes fuel from a fuel supply to fuel dispensers in a daisy chain arrangement with a double walled piping system. Fuel leaks that occur within the double walled piping system are returned to the underground storage tank by the outer ...
11/08/2005
6947060Image 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
6935161Service station leak detection and recovery system
A fueling environment distributes fuel from a fuel supply to fuel dispensers in a daisy chain arrangement with a double-walled piping system. Fuel leaks that occur within the double-walled piping system are returned to the underground storage tank or a sump proximat...
08/30/2005
6914637Method and system for video and auxiliary data transmission over a serial link
A communication system including a transmitter, a receiver, and a serial link, in which encoded data (e.g., video, audio, and optionally also other auxiliary data) are transmitted from the transmitter to the receiver. The serial link can but need not be a TMDS or TM...
07/05/2005
6873368Low noise encoding and decoding method
An adaptive digital image processor precedes an MPEG2 encoder. The processor receives a high definition video signal intended for broadcast or storage, and adaptively low-pass filters the signal. The signal is subjected to low-pass two-dimensional filtering to elimi...
03/29/2005
6831702Method of and apparatus for identifying a signal transmitting source
A method of and apparatus for identifying a signal transmitting source detects a switching of a signal on the reception side thereby to prevent a transmission error from occurring when a signal is switched. The apparatus for identifying a signal transmitting source ...
12/14/2004
6633340Video signal processor
A video signal processor reduces the deterioration of image quality due to the superposition of noise on a sync signal included in a luminance signal. A frequency discriminator outputs a first error signal if a ratio of the frequency of a frequency-modula...
10/14/2003
6519304Circuitry operative on selected symbol slicing results for synchronizing data fields in a digital television receiver
A digital television signal receiver includes a bin amplitude comparator for symbol decoding and match filtering to recover data synchronizing information from selected bin amplitude comparator responses generated during data slicing. The bin amplitude co...
02/11/2003
6519298Circuit for discriminating between received signals and method therefor
A circuit for discriminating between received signals and a method therefor are provided. The circuit includes a detector for detecting a peak signal based on the degree of correlation between a received signal and a reference signal and a generator for g...
02/11/2003
6480236Envelope detection of PN sequences accompanying VSB signal to control operation of QAM/VSB DTV receiver
The data field synchronization segment as symbol coded for VSB transmission comprises pseudo-random noise (PN) sequence information that can be detected in a QAM/VSB DTV signal receiver using an envelope detector responsive to final intermediate-frequency...
11/12/2002
6449325Circuitry operative on selected symbol slicing results for synchronizing data fields in a digital television receiver
A digital television signal receiver includes a bin amplitude comparator for symbol decoding and match filtering to recover data synchronizing information from selected bin amplitude comparator responses generated during data slicing. The bin amplitude co...
09/10/2002
6388717Digital television transmitting system having data and clock recovering circuit
A digital television transmitting system is presented having a recovery circuit for recovering non-return to zero (NRZ) data pulses and transport clock pulses from a biphase-mark serial data pulse stream and wherein the recovered NRZ data pulses and the r...
05/14/2002
6288690Video control circuit for a video display device
A video control circuit controls the gains for red(R), green(G), and blue(B) color video signals inputted to a monitor, the brightness and contrast of a video display on the monitor, and the bias of a cathode ray tube within the monitor. A microcomputer o...
09/11/2001
6041361Digital video recorder providing separate pipelining for odd and even fields from a single camera
A video data recording unit receives input video signal streams from up to 16 cameras. The signal streams are selectively converted into digital video signals and are stored on a data storage device such as a hard disk. The apparatus is controlled so that...
03/21/2000
6014175Process for preparation of sampled values
For preparation of sampled values represented as two's complements, a two's complement clipping of the least significant bits(LSB) occurs. In place of the removed bits (LSB), the synchronization information (s(k)) is added with an average value depending ...
01/11/2000
5912712Time expansion of pulse width modulation sequences by clock dropping
A method for expanding pulse width modulation sequences that control a display system to adapt to varying video frame times. A minimal amount of extra circuitry (10) is provided that regulates a sequencer (26). After calculating the appropriate expansion ...
06/15/1999
5859876Method and apparatus for improving AM compatible digital broadcast analog fidelity
A digital signal transmission system is provided which minimizes the AM signal envelope distortion caused by multiple digitally modulated carriers in the same band as the AM signal. The system transmits an amplitude modulated signal. Digital carriers for ...
01/12/1999
5602595ATV/MPEG sync system
An ATV system encodes variable length elementary streams of data into a multilevel symbol signal comprising a plurality of multiplexed fixed length data packets without sync information. The fixed length data packets are arranged in fields of repetitive d...
02/11/1997
5600633Wireless telecommunication base station for integrated wireless services with ATM processing
A wide variety of services both narrow band and broad band are provided to wireless stations both fixed and mobile by a flexible intelligent ATM base station. Such a base station provides two-way integrated voice, wireless date, wireless multimedia, and c...
02/04/1997
5598220Digital signal with multilevel symbols and sync recognition
A digital video field identification system includes video signals formatted in blocks of video symbols in repetitive data segments with each data segment including a synchronizing signal character. One data segment includes a field timing signal. A refer...
01/28/1997
5550596Digital television signal processing system including a co-channel rejection filter
A digital signal proces sing system for receiving and processing a high definition television signal, eg., in a Pulse Amplitude Modulation (PAM) format, includes a filter for rejecting interferer signals such as a narrowband continuous wave NTSC co-channe...
08/27/1996
5534938Digital TV system using segment and field sync signals
A digital data transmission system includes data signals formatted in successive fields consisting of blocks of video symbols in repetitive data segments with each data segment including a synchronizing signal character for providing data segment sync. Th...
07/09/1996
5416524Digital television synchronization system and method
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 separat...
05/16/1995
5398073Concatenated coded vestigial sideband modulation for high definition television
A modulation scheme for HDTV, for example, uses a concatenated code comprised of a Reed-Solomon coder followed by an N-dimensional trellis coder whose N-dimensional output symbols with N>1, are used to modulate a one-dimensional vestigial sideband modulat...
03/14/1995
5363141Method and apparatus for transmitting encoded blocks of video signals at different channel rates
Encoded blocks of video information are selected for transmission at a plurality of channel rates based on the corresponding location of the portions of the video image represented by the encoded blocks. Each encoded block is designated an image type whic...
11/08/1994
5333014Non-sharp cut filters for assembling and splitting in Weston Clean PAL
An assembler and splitter of a Weston PAL (W-PAL) video signal has filter functions F1, F2 at the assembler for the luminance and chrominance components and corresponding functions F3, F4 at the splitter. The tr...
07/26/1994
5196921Data transmission using color burst position modulation
To transmit digital data in a color television signal, a color burst is transmitted in its standard reference position to represent a first logic state, e.g., a "0" and is shifted by a limited amount from the standard reference position to represent a sec...
03/23/1993
5148274PAM signals modulation with mappings to improve utilization of available transmission capacity
A high definition television system that is characterized by low transmission bandwidth is achieved by removing redundancies in the signal, encoding the remaining signals, and transmitting the encoded signal in a manner that is most compatible with the ap...
09/15/1992
4954879Apparatus and method for compressing a video signal
An apparatus and method for compressing a video signal wherein red, green and blue color video signals are input into an apparatus, and a brightness signal and at least two color difference signals are generated therefrom, encoded and stored in a memory. ...
09/04/1990
4945403Color television format using pulse frequency and pulse width modulation
A luminance signal in a component video signal is pulse frequency modulated, and the pulse frequency modulated signal is sequentially pulse width modulated by two color difference signals alternately. Thus, the component video signal is transmitted as one...
07/31/1990
4695873Horizontal line data position and burst phase encoding apparatus and method
Information related to the beginning of data and the phase of color burst on consecutive horizontal scan lines of a digital color television signal is encoded into a variable width pulse. A first transition of that pulse has a predetermined phase relation...
09/22/1987
4675721Method for coded transmission of color television signals
In a method for transmission of color television signals, at least two color information containing signals are coded using code elements comprised of a half period or a full period of a sine wave, the sequence of code elements forming at least one essent...
06/23/1987
4516118Pulse width modulation conversion circuit for controlling a color display monitor
A video display terminal (VDT) is provided with a controller having six digital logic lines capable of defining sixty-four different colors. An eight color color display monitor (CDM) having three red, green and blue (RGB) video input lines is connected t...
05/07/1985
4464685Method and apparatus for decoding and recording composite digital television signals to prevent degradation of the signals
A decoder-recoder arrangement for decoding a composite digital television signal for recording on a digital video recorder and for subsequently recoding the reproduced signal, the arrangement comprising a decoder including filters for separating two chrom...
08/07/1984
4460924Dither quantized signalling for color television
One or more of the video components of prior art are quantized coarsely before being sent to a receiver. To prevent perceptible loss of picture information and to minimize visible artifacts, suitable ordered dither is added before a component is quantized...
07/17/1984
4386424Broad band telecommunication system
In an exemplary embodiment, subscriber lines are formed by means of light waveguides and transmit pulse-modulated TV signals in time-division multiplex. These pulse-modulated signals are converted into PAM signals at the subscriber side, from whose freque...
05/31/1983
4229830Apparatus and method for providing a modulation format for multiple wideband signal transmission
A modulation format for containing, for simultaneously transmitting via a single optical fiber, and for decoding, multiple independent wideband signals. The format derives maximum advantage from the inherent wideband properties of the optical fiber, while...
10/21/1980
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