Method, apparatus and system for de-blocking video data

Abstract

A method of de-blocking video data is disclosed. The video data encoding colour channels in a 4:2:2 format is received. The video data is encoded in a quad-tree. A plurality of transform units is generated for one of the colour channels, each of the transform units including at least one transform. A distance from an edge of one of the transform units to a boundary of a transform of the transform unit is determined. An edge flag for the transform unit is determined, the edge flag indicating the determined distance. De-blocking is applied to the transform units of the video data according to the determined edge flag.

1 . A method of de-blocking video data, the method comprising:
 receiving the video data having colour channels;   determining a size of the transform unit containing a plurality of chroma sample arrays for a single chroma channel of the colour channels;   determining a chroma boundary in the transform unit for the single chroma channel and determining one or more flag values associated with the determined chroma boundary according to the determined size of the transform unit; and   applying de-blocking to the determined chroma boundary in the transform unit of the video data depending on the determined flag values, without applying de-blocking to a corresponding luma boundary.   
     
     
         2 . The method according to  claim 1 , wherein the size of the transform unit is determined based on a hierarchical level of a transform unit. 
     
     
         3 - 9 . (canceled) 
     
     
         10 . A method of de-blocking video data, the method comprising:
 receiving the video data having colour channels;   determining a size of a transform unit containing a plurality of sample arrays for a first channel of the colour channels;   determining a boundary in the transform unit for the first channel and determining one or more flag values associated with the determined boundary according to the determined size of the transform unit; and   applying de-blocking to the determined boundary in the transform unit of the video data depending on the determined flag values, without de-blocking to a corresponding boundary for a second channel of the colour channels.   
     
     
         11 . The method according to  claim 10 , wherein the size of the transform unit is determined based on a hierarchical level of the transform unit.