Method and Apparatus for Intra Coding for a Block in a Coding System

Abstract

A method and apparatus of Intra coding for a block in a coding system. The method includes receiving input data associated with a current block; determining a current Intra prediction mode for the current block; deriving prediction samples for the current block based on reconstructed neighboring samples according to the current Intra prediction mode, wherein a predicting value representing a single prediction value for the current block is determined based on at least two corner samples corresponding to the current block according to the current Intra prediction mode; and applying encoding or decoding to the input data associated with the current block using the prediction samples derived for the current block.

1 . A method of Intra coding for a block in a coding system, the method comprising:
 receiving input data associated with a current block;   determining a current Intra prediction mode for the current block;   deriving prediction samples for the current block based on reconstructed neighboring samples according to the current Intra prediction mode, wherein a predicting value representing a single prediction value for the current block is determined based on at least two corner samples corresponding to the current block according to the current Intra prediction mode; and   applying encoding or decoding to the input data associated with the current block using the prediction samples derived for the current block.   
     
     
         2 . The method of  claim 1 , wherein the at least two corner samples corresponding to the current block comprise two corner prediction samples of a left-most column of the current block if the Horizontal mode is selected. 
     
     
         3 . The method of  claim 1 , wherein the at least two corner samples corresponding to the current block comprise two corner reconstructed samples of the reconstructed neighboring column adjacent to a left block boundary of the current block if the Horizontal mode is selected. 
     
     
         4 . The method of  claim 1 , wherein the at least two corner samples corresponding to the current block comprise two corner prediction samples of a top row of the current block if the Vertical mode is selected. 
     
     
         5 . The method of  claim 1 , wherein the at least two corner samples corresponding to the current block comprise two corner reconstructed samples of the reconstructed neighboring row adjacent to a top block boundary of the current block if the Vertical mode is selected. 
     
     
         6 . The method of  claim 1 , wherein the at least two corner samples corresponding to the current block comprise four corner prediction samples of the current block. 
     
     
         7 . The method of  claim 6 , wherein predicting value is determined using a mean median, maximum, minimum, or linear combination of said four corner prediction samples of the current block. 
     
     
         8 . The method of  claim 1 , wherein the at least two corner samples corresponding to the current block comprise two corner prediction samples of a line of the current block adjacent to a block boundary of the current block according to the current Intra prediction mode for the current block. 
     
     
         9 . The method of  claim 1 , wherein the at least two corner samples corresponding to the current block comprise two corner reconstructed samples of reconstructed neighboring line adjacent to a block boundary of the current block according to the current Intra prediction mode for the current block. 
     
     
         10 . An apparatus for Intra coding of a block in a coding system, the apparatus comprising one or more electronic circuits configured to:
 receive input data associated with a current block;   determine a current Intra prediction mode for the current block;   derive prediction samples for the current block based on reconstructed neighboring samples according to the current Intra prediction mode, wherein a predicting value representing a single prediction value for the current block is determined based on at least two corner samples corresponding to the current block according to the current Intra prediction mode; and
 apply encoding or decoding to the input data associated with the current block using the prediction samples derived for the current block.