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. 27, 2001
Filed:
Nov. 30, 1998
Other;
Abstract
A method selects a requantization step size which abruptly changes a bit-rate in a piecewise linearly decreasing model and controls the bit-rate. The method includes: deciding a minimum value of the requantization step size Q2, satisfying 2·Q1+nint(p·Q2/q)<2·Q2 for a quantization step size Q1 of a coded image block of a video image, as requantization step size information; determining a minimum value of a requantization step size Q2, satisfying 4·Q1+nint(p·Q2/q)<2·Q2 for the quantization step size Q1 of the coded image block, as the requantization step size information; taking a minimum value of a requantization step size Q2, satisfying 3·Q1<2·Q2 for the quantization step size Q1 of the coded image block, as the requantization step size information; and choosing a minimum value of a requantization step size Q2, satisfying 5·Q1<2·Q2 for the quantization step size Q1 of the coded image block, as the requantization step size information, wherein nint(·) is a nearest integer operator and p and q represent positive integers, respectively.