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:
Mar. 14, 1995
Filed:
Mar. 26, 1993
Chien M Huang, Logan, UT (US);
Paul D Israelsen, North Logan, UT (US);
Scientific Atlanta, Atlanta, GA (US);
Abstract
Vector quantization of a data vector proceeds through successive stages of a multi-stage vector quantization encoder until either (i) a measure of distortion between the vector input to a given stage and the codevector selected at that stage satisfies a threshold value or (ii) the last stage of the encoder is reached. The threshold value varies according to the fullness of a buffer which stores vector quantized data to be transmitted. Consequently, the last stage reached may differ from data vector to data vector. Compression efficiency therefore improves. Preferably, the mean value of each data vector is removed prior to vector quantization.