Patent ID: 6985635
Filing Date: 2006-01-10
Classification: H04N

Abstract:
1. A method for encoding a stream of input-video image having at least one macro-block, the method comprising the steps of: generating a motion vector for each macro-block of said input-video image; generating a predictive-image signal of said input-video image based on said motion vector; transforming said predictive-image signal into a two-dimensional array of DCT coefficients; modifying the array of said DCT coefficients into a set of new DCT coefficients according to predetermined criteria, wherein said modifying step includes discarding the last-column DCT coefficients and the last-row DCT coefficients alternatively until the energy level of said DCT coefficients reaches a predetermined energy level and, assigning said discarded column or row with a predetermined value; quantizing said new DCT coefficients into a quantized DCT value; performing a zigzag scan to read each row of said new DCT coefficients into a serial chain; and, coding said serial chain from said zigzag scan and said motion vector to produce an encoded macro-block.