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:
Aug. 10, 1993
Filed:
Nov. 19, 1991
Keith Lucas, Richmond Hill, CA;
Scientific-Atlanta, Inc., Atlanta, GA (US);
Abstract
A method and apparatus for low-frequency removal in vector quantization of an image frame. An image frame is converted to plurality of input vectors. A mean value of each input vector is determined and transmitted to a plurality of reception sites. A low-frequency component of each input vector is then determined and removed from the input vector. A scalar mean value of each low-frequency removed vector is then determined and subtracted therefrom to produce a residual vector. The residual vectors are then vector quantized and the vector quantized data is transmitted to the reception sites. At a reception site, the transmitted mean values and vector quantized data are received and each input vector is reproduced therefrom. From the reproduced input vectors, the image frame is recreated for display at the reception site.