generating a Y component partial error measure SAEy in accordance with the following equation: ##EQU18## wherein F is {HEAD ~ a function} of yr and {TAIL ~ yd} , N is the vertical dimension of a Y component block corresponding to the current region, M is the horizontal dimension of the Y component block, yr are the decoded Y component signals corresponding to the decoded region, and yd are the Y component signals corresponding to the reference region 
generating a Y component partial error measure SAEy in accordance with the following equation : # # EQU18 # # wherein F is { HEAD ~ a function } of yr and { TAIL ~ yd } , N is the vertical dimension of a Y component block corresponding to the current region , M is the horizontal dimension of the Y component block , yr are the decoded Y component signals corresponding to the decoded region , and yd are the Y component signals corresponding to the reference region
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH