Patent ID: 6795504
Filing Date: 2004-09-21
Classification: H04N

Abstract:
A method comprising:segmenting a buffer into a specified number of areas to hold coefficients computed at different lifting steps of a lifting function; and continuously processing consecutive groups of pictures (GOPs) from a video sequence by buffering coefficients at intermediate lifting steps towards an end of one GOP until intermediate coefficients from a beginning of a next GOP are available, wherein the buffer is segmented into five areas B0, B1, B2, B3, and B4, and the processing comprises performing the following operations for an odd-numbered picture from the video sequence: B4â† B4+a*B3, B3â† B3+b*B2, B2â† B2+c*B1, B1â† B1+d*B0, Output B0. where a, b, c, and d are weights dictated by the lifting function.