Granted Patent B2

US 7,983,343 · App. 11/331,404 · Granted Jul 19, 2011

Assignee: LSI Corporation

Abstract

Claims (15)

1. A method for context adaptive binary arithmetic decoding comprising the steps of:

(A) presenting a video signal and macroblock data in response to decoding one or more bins on a binary signal;

(B) generating said binary signal in response to a bitstream signal and said macroblock data;

(C) calculating subsequent context information for a macroblock based on a value of said bin currently being decoded;

(D) arithmetically decoding context information while simultaneously performing step (C);

(E) calculating first context information by assuming said value of said bin currently decoded is a first predetermined value;

(F) calculating a second context information by assuming said value of said bin currently decoded is a second predetermined value;

(G) selecting (i) said first context information if said bin currently decoded is said first predetermined value and (ii) said second context information if said bin currently decoded is said second predetermined value;

(H) presenting data of a current macroblock;

(I) parsing H.264 bin grammar of said one or more bins;

(J) determining a syntax element from said H.264 bin grammar and a bit index position within said determined syntax element; and

(K) pre-decoding said syntax elements needed to calculate said first context information and said second context information.

2. The method according to claim 1 , further comprising the step of:

storing data of a left and above neighboring macroblock; and

presenting data of said left and above neighboring macroblock in response to a current neighboring macroblock.

Assignments (10)

Continuity (1)