US Patent No. 9,596,484

METHOD OF DEPTH INTRA PREDICTION USING DEPTH MAP MODELLING


Patent No. 9,596,484
Issue Date March 14,2017
Title Method Of Depth Intra Prediction Using Depth Map Modelling
Inventorship Kai Zhang, Beijing (CN)
Jicheng An, Beijing (CN)
Jian-Liang Lin, Yilan (TW)
Assignee HFI INNOVATION INC., Zhubei, Hsinchu County (TW)

Claim of US Patent No. 9,596,484

1. A method of Intra coding for a depth block in a three-dimensional video coding system, the method comprising:
receiving input data associated with a current depth block, wherein the current depth block is partitioned into one or more
segments;

receiving reconstructed neighboring depth samples of the current depth block;
deriving a prediction value for each segment based on reconstructed neighboring depth samples, wherein the reconstructed neighboring
depth samples for at least one segment comprise at least one reconstructed sample from an extended top neighboring row or
an extended left neighboring column, the extended top neighboring row includes at least one extended top-row reconstructed
depth sample located adjacent to top side of a second depth block adjacent to right side of the current depth block, and the
extended left neighboring column includes at least one extended left-column reconstructed depth sample located adjacent to
left side of a third depth block adjacent to bottom side of the current depth block; and

encoding or decoding each segment of the current depth block using the prediction value,
wherein the current depth block corresponds to an N×N block, N is an integer, upper-left corner sample of the current block
is designated as P0,0, lower-right corner sample of the current block is designated as P(N?1),(N?1), the extended top neighboring row comprises {PN,?1, . . . , P2N?1,?1}, the extended left neighboring column comprises {P?1,N, . . . ,P?1,2N?1},

wherein when a result of a first test associated with two top row reference depth samples of the current depth block is identical
to a result of a second test associated with two left column reference depth samples of the current depth block:

selecting PX,?1 or P?1,X as a prediction value for one segment of the current depth block according to a comparison of an absolute difference of two
ending samples of the extended top neighboring row and an absolute difference of two ending samples of the extended left neighboring
column, wherein X is selected from a group of integers starting from 0 to (2N?1).