Most current video compression standards employ DCT transform and motion compensation,which approximately consumes 10% of encoding time, while motion estimation consumes about 60%.
This paper research the MPEG-4 standard and realize the software prototype of the MPEG-4 video codec. The paper emphasize two key techniques in MPEG-4 encoder: Motion Estimation and Bit Rate Control.
This paper, through analysis and evaluation on the parameters related to the kinematical analysis of the hurdling techniques,revealed the basic principles of the modern hurdling techniques,advanced theoretical and practical opinions for improving and per-fecting the skills of Yu Zhicheng's clearing hurdling.
The authors hold that motor skill,which is integrated with sport technique under a certain sport form,is the motor ability. Motor ability is the internal measure of motor skill while sport technique is external measure of motor skill. The motor skill briefly reflects the overall process of the motor practice,and is the measure of judging the degree of sports individualization.
Using literature summaries and experiment comparison,the author expounds the features and laws of the routine techniques,exercise intensity,and arts of attack during the development of these five schools such as Chen style,Yang style,Wu style,Wu style and Sun style.