Method of Binarization and Context Adaptive Binary Arithmetic Coding of Depth Coding Syntax

A method of depth coding for a depth block in a three-dimensional (3D) encoding system, the method comprising:

• receiving input data associated with a current depth block;
• converting a first value associated with the current depth block into a binary codeword, wherein the first value corresponds to residual magnitude of the current depth block coded by an Intra SDC (Segment-wise Depth Coding) mode or an Inter SDC mode, or delta DC (Direct Current) magnitude of the current block coded by a DMM (Depth Modeling Mode) mode;
• encoding a first bin of the binary codeword using arithmetic coding to generate a first coded output;
• encoding rest bins of the binary codeword using bypass coding to generate a second coded output;
• and
• providing the first coded output and the second coded output.

A method of depth coding for a depth block in a three-dimensional (3D) decoding system, the method comprising:

• receiving coded data associated with a current depth block;
• parsing a first coded data and a second coded data of a binary codeword associated with a first value of the current depth block, wherein the first value corresponds to residual magnitude of the current depth block coded by an Intra SDC (Segment-wise Depth Coding) mode or an Inter SDC mode, or delta DC (Direct Current) magnitude of the current block coded by a DMM (Depth Modeling Mode) mode;
• decoding the first coded data into a first bin of the binary codeword using arithmetic coding;
• decoding the second coded data into rest bins of the binary codeword using bypass coding;
• converting the binary codeword consisting of the first bin and the rest bins into a reconstructed first value;
• and
• reconstructing the current depth block using the reconstructed first value.