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Class 348/492 - Simultaneous signals


Subclass of Class 348 - Television
Definition: Subject matter wherein a plurality of color signals or luminance
No. of patents: 21
Last issue date: 11/21/2006


NumberTitleIssue Date
7139684High bandwidth real time oscilloscope
A method and apparatus for digitizing a data signal, the method comprising the steps of receiving an input analog data signal, splitting the received input analog data signal into a plurality of split signals, and mixing at least one of the split signals with a pred...
11/21/2006
7042940Digital video signal transmission apparatus and image display apparatus
A digital video signal transmission apparatus is provided with (a) a digital video signal conversion circuit for converting each chrominance signal of an input digital video signal in such a manner that every plural frames (1) in one frame of the plural frames each ...
05/09/2006
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
6853385Video, audio and graphics decode, composite and display system
A video, audio and graphics system uses multiple transport processors to receive in-band and out-of-band MPEG Transport streams, to perform PID and section filtering as well as DVB and DES decryption and to de-multiplex them. The system processes the PES into digita...
02/08/2005
6748005Methods and apparatus for providing a direct frequency hopping wireless interface with a personal computer
A system and method to provide cost effective, portable and convenient access to the Internet and other personal computer applications from any location within a predetermined distance from a desktop personal computer (PC). According to one aspect, a compact handhel...
06/08/2004
6195797Apparatus and method for providing computer display data from a computer system to a remote display device
A method and apparatus are provided for enabling multiple users to concurrently access a PC-based server in a home local area network using conventional TVs as display devices. A client system includes a TV, conventional input devices, such as a keyboard ...
02/27/2001
5469219RF-based high-bandwidth signal transmission method and apparatus
A method and apparatus for signal transmission in which each of a series of input signals (e.g., RGB baseband video signals) is frequency-modulated onto an intermediate frequency. The intermediate frequency signals thus produced are then fed through RF mi...
11/21/1995
5438371Data transmission method
At least a first and a second digital signal, both in parallel form, are converted to a single serial signal and transmitted from a digital color decoder to a signal processing unit so as to avoid picture disturbances in the signal processing unit. The fi...
08/01/1995
5365275Method and apparatus for generating PAL video signal by digital processing
Disclosed is a method and apparatus for highly stably and accurately generating a PAL video signal by digital processing. The method and apparatus comprise generating a basic clock having a frequency which is 11×N times (N: an integer) as high as a horiz...
11/15/1994
5134464Method and apparatus for the transmission and reception of a multicarrier digital television signal
A method and apparatus for encoding a television source signal having a first bandwidth, into a frequency multiplexed signal having a narrower bandwidth and comprising a plurality of subcarriers modulated with digital information. Each of said subcarriers...
07/28/1992
5053860Method and apparatus for the transmission and reception multicarrier high definition television signal
A method and apparatus for generating a multi-carrier high-definition television (HDTV) signal including a digital sound and sync (DSS) component, on a conventional television channel, for example, 6 Hz. MAC derived signal components are quadrature modula...
10/01/1991
4970596Pseudo line locked write clock for picture-in-picture video applications
The write clock controlling operation of the PIP circuitry (e.g. the analog digital converter in the PIP channel) utilizes a clock signal source having a substantially higher frequency (preferably six times) the desired write clock frequency. This clock s...
11/13/1990
4958230Method of transmitting auxiliary information in a television signal
Apparatus for augmenting a television signal with auxiliary signal includes circuitry for modulating a picture carrier with baseband video signal to generate a vestigial sideband television signal. Auxiliary signal is modulated on a further carrier of suc...
09/18/1990
4926245Quadrature amplitude modulation preserving one channel zero crossing for video telephone
The present invention provides a QAM modulation scheme compatible with a single channel demodulator. The inphase (I) channel is provided with luminance information encoded on a series of sine wave symbols. The quadrature (Q) channel is used for color diff...
05/15/1990
4893175Video signal transmission system with reduced number of signal lines
A video signal transmission system for transmitting a plurality of color video signals and horizontal/vertical sync signals from a transmitter part to a receiver part through a plurality of signal transmission lines is disclosed. The transmitter part incl...
01/09/1990
4652938Digital processing circuit for video signal
A digital processing circuit for a video signal digital by processing a composite video signal. More specifically, a composite video signal is separated into a luminance signal and a color signal by means of a Y/C separator (10). The color signal separate...
03/24/1987
4597005Digital color photographic image video display system
In a color photographic video data conversion system digital data representing each of three primary color components of a pixel is converted (i.e. encoded) to digital data comprising luminance data for the pixel and smoothed (i.e. averaged) chrominance d...
06/24/1986
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
4295156Method for producing color television signals
To transmit color video information from one point to another within a color television studio complex, particularly for distribution of source signals which are intended to be processed in a digital mode at another location in the studio, the information...
10/13/1981
4068258Method for compressing then expanding a television signal
The present invention relates to methods which make it possible to partially eliminate the redundancy in television signals. It consists in splitting the spectrum of the video signal into two parts, one containing the low frequencies, this being transmitt...
01/10/1978
4051517Hybrid sequential and carrier encoded color television transmission method and circuits
A method and circuits for encoding a color video signal for processing, preferably recording and/or playback of said signal within a limited bandwidth of not more than 3MHz without a separate channel for color information such that one half the sum of two...
09/27/1977
 
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