A 1.2-W SINGLE-CHIP MPEG2 MP-AT-ML VIDEO ENCODER LSI INCLUDING WIDE SEARCH RANGE (H + -288, V +/-96) MOTION ESTIMATION AND 81-MOPS CONTROLLER/

An MPEG2 MP@ML video encoder large-scale integrated circuit (LSI) has been developed including an 81 MOPS controller and motion estimator. B y using two adaptive algorithms, a wide motion-estimation search area (+/-288 pixels horizontal and +/-96 pixels vertical) was achieved with computation complexity of only 0.5% (20 GOPS) of full search block-ma tching algorithm. By using this expanded motion-estimation search area , there is a significant improvement in picture quality for coding fas t motion sequences. The power consumption was reduced by using an effi cient pipeline architecture and optimizing the circuitry, especially i n the motion-estimation block and the data transfers for the external SDRAM. The 13.7 x 12.4 mm(2), 4.5-M transistor device using 0.4-mu m C MOS technology dissipates 1.2 W at 3.3 V.