Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

TV Signal

Technique-for-minimizing-multi-path-distortion-effects-in-video-transmission

Method and apparatus for composite wobbled and push-pull tracking servo system

With a view to solve the prior art problem of the offset pointed out above, it is a primary object ...

Method of recording and reproducing digital information and apparatus therefor

It is an object of the present invention to solve the above-mentioned prior art problems and ...

Digital selective calling receiver having a selectively attachable device for multiple independent address decoding capability

I claim: 1. In a digital selective call receiver including a receiver circuit for receiving ...

Portable transfer apparatus

Accordingly, an object of the present invention is to provide a portable transfer apparatus that ...

Positioning and control apparatus that is interactively programmable using a display

The first positioning apparatus of the conventional art requires machine mechanisms, such as a long ...

Information transmission system having collective data transmission and collection devices

It is an object of the present invention to provide a communication control method and an ...

Teletext receiver

The object of the present invention is to obviate this disadvantage by giving the teletext ...

Rotary head assembly

The principal object of the present invention is to provide a novel head assembly for use in a ...

Abnormal separation detecting circuits of chromatic signals of SECAM systems

Accordingly, it is an object of this invention to provide a novel abnormal separation detecting ...

Color video signal recording and reproducing apparatus

Accordingly, it is a general object of the present invention to provide a novel and useful color ...

Technique for minimizing multi-path distortion effects in video transmission

Details

Inventors: Kennedy, Paul G.;
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Examiner: Britton; Howard W.
Assistant Examiner:
Attorney, Agent or Firm: Lynch; M. P.

A reference signal reflecting distortion characteristics caused by surrounding interference conditions is applied to transmitted television video or quasi-video information to effectively cancel the distortion characteristics of the incoming transmitted video information. In the event the signal distortion results from randomly occurring interference such as "airplane flutter" the reference signal may be updated periodically such as during the vertical blanking of each and every incoming television frame. This regular and periodic updating of the reference signal will serve to compensate continuously for varying interference conditions as well as compensating for fixed interference patterns. In the event the interference causing signal distortion is the result of a fixed condition, it may not be necessary to update continuously the reference signal and thus a random or manually initiated update may be acceptable.

DETAILED DESCRIPTION What is claimed is: 1.
A method for reducing the distortion characteristics of video bandwidth information transmitted in television line format, wherein the non-recurring program information comprises the active portion of the TV line and the recurring blanking, sync and code information comprises the inactive portion of the TV line, comprising the steps of, transmitting an initial TV line without said non-recurring video bandwidth information in said active portion of said initial TV line prior to transmission of a plurality of successive TV lines containing video bandwidth information in the active portions thereof, storing said initial TV line with the attendant distortion and reflections resulting from transmission interference with the recurring information contained in the inactive portion of said initial TV line, said stored initial TV line comprising a reference TV line, transmitting successive TV lines following said initial TV line, said successive TV lines containing non-recurring video bandwidth information in the active portions thereof, and recurring information in the inactive portions thereof, said successive TV lines comprising program information TV lines, and combining said reference TV line with each of said successively transmitted program TV lines to effectively minimize the distortion and reflection introduced in said successively transmitted program information TV lines resulting from transmission interference with the recurring information of said program information TV lines.
2.
A method as claimed in claim 1 wherein said successive TV lines comprise a television field, and said initial TV line is transmitted during the vertical blanking interval.
3.
A method as claimed in claim 2 including the step of updating the reference TV line by transmitting an initial TV line in the vertical blanking interval of each and every field of transmitted video bandwidth information, wherein said field of transmitted video bandwidth information comprises said successive TV lines

Related patents

	Method and apparatus for using a vertical internal test signal for phase control of an offset modulation of offset sampling system It is an object of the present invention to provide a method for modulation and synchronous demodulation of color television signals processed according to the offset ...
	Optimized routing of calls to roaming subscribers within a telecommunications network The present invention discloses a method and system for optimally routing a call connection within a mobile telecommunications network. A telecommunications subscriber ...
	Distributed subscriber data management in wireless networks from a remote perspective In the broadest sense, our invention is directed to a system and method for increasing capacity of a cellular system by reducing call overhead processing and ...
	Method and apparatus for detecting the movement of a device that receives a signal broadcast from a relative fixed position Generally, a method and apparatus are provided for detecting the movement of a device that receives a signal broadcast from a relative fixed position, such as a signal ...
	D.C. Controlled adjustable ramp signal generator and method Consequently, it is an object of the invention to provide a circuit and method for generating a ramp signal which has a D.C. controlled adjustable level. It is a further ...
	Apparatus using disc-shaped record bearing medium This invention is directed to the solution of the problems mentioned in the foregoing. It is therefore a principal object of the invention to provide a novel recording ...
	Video record player switching system What is claimed is: 1. In a video record player, including means for recovering recorded signals respectively representative of picture information and accompanying ...
	Clock generation circuit for multistandard serial digital video with automatic format identification It is an object of the present invention to provide a method and circuit for producing frequency agile clock signals suitable for use with D1 component digital video, NTS...
	Multi-beam light source unit The preferred embodiments of the present invention overcome the problems described above by providing a multi-beam light source unit having excellent stability in beam ...
	Load shedding timer for a power management system It is an object of this invention, therefore, to an improved power shedding timer which assures restoration of a plurality of load sites to the power management system ...

0.034
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved