With the popularity of the application of computer and network technology

there is a bright prospect for the multimedia video terminal embedded in PC. But because of the speed limit of current computer

this terminal could not be realized with software fully. According to this condition

we analyses the computation of video codec in detail

and present a design idea for multimedia terminal based on the cooperation of software and hardware. With this idea

a multimedia video terminal is designed with a video microprocessor which is used for low level codec computation

such as DCT/IDCT

ME/MC

and Quantization/Inverse Quantization

and PC is used for processing medium and high level task such as VLC/VLD

the construction and deconstruction of coded stream . So it takes each advantage of them fully

and not only enhances the global performance greatly

but also provides more functions. This also indicates a more economic way for MPEG2 encoder realization too.