Abstract: An H.263/MPEG video encoder using DCT in a mobile communication terminal. The H.263/MPEG video encoder controls a quantization value using granularity analysis by motion estimation and efficiently controls bit rates. The H.263/MPEG video encoder performs DCT for an input image (N?1), quantizes the input image to output the input image as a video stream, decodes the quantized signal by means of inverse quantization (IQ) and inverse discrete cosine transform (IDCT), and performs motion estimation in comparison with a next input image (N). The H.263/MPEG video encoder includes a granularity analyzing section for analyzing granularity using a result of performing the motion estimation, a granularity control section for controlling a quantization value for the quantization according to an analysis result of the granularity analyzing section, and a frame rate control section for controlling a frame speed of an output of the video stream.

Abstract: An apparatus and method for minimizing inter-signal interference in a wireless communication system are provided. The polarization phases of Mobile Stations (MSs) are measured. An MS group including a predetermined number of MSs is determined and a polarization phase of the MS group is compensated. The polarization phase of a transmission signal is matched to the compensated polarization phase and the matched signal is sent to the MS group.

Abstract: An apparatus and method for multiplexing voice packets to an ATM cell in an ATM network. Voice packets received from voice users to which voice calls have been connected are stored in a queue. An output rate controller determines a maximum number of ATM cells that can be transmitted during a predetermined control period according to information about the voice calls. When a voice packet is received at the queue, or when a predetermined operation period is reached, the output rate controller compares a number of ATM cells transmitted during the control period with the maximum number of ATM cells. If the number of transmitted ATM cells is less than the maximum number of ATM cells, the output rate controller requests a multiplexer to output an ATM cell. Then the multiplexer forms an ATM cell from stored voice packets by multiplexing.