The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1988
Filed:
Jun. 05, 1987
Harvey Waldman, Yardley, PA (US);
Sheau-Bao Ng, Plainsboro Township, Middlesex County, NJ (US);
General Electric Company, Schenectady, NY (US);
Abstract
A digital television transmitter has a buffer that receives a low resolution low pass filtered signal. A high resolution high pass filtered signal is applied to the buffer only when the buffer can accept it without overflowing in accordance with a threshold signal. A controller provides a control signal that varies in accordance with an interframe difference motion indicator signal and the inverse of the occupancy of the buffer. A digital television receiver receives a digital television picture signal and preferably a transmitter buffer occupancy state signal. A low resolution low pass filtered signal is applied to an adder. A high resolution high pass filtered signal is applied to the adder in accordance with the buffer state and motion indication. The transmitter and receiver are useful in video teleconferencing.