Video encoding and decoding device

A video coding and decoding apparatus having a motion compensation device using motion compensation, the video coding and decoding apparatus comprising:

• a plurality of video decoder engines;
• a plurality of engine direct memory access buses connected to the plurality of video decoder engines;
• a frame buffer;
• a main direct memory access bus connected to the frame buffer;
• a motion compensation device that issues a direct memory access request according to decoding parameters, computation level Lc, a maximum direct memory access burst constraint and a block buffer size constraint, receives a plurality of direct memory access input data after receiving a direct memory access acknowledgement, issues a direct memory access completion, computes interpolated data according to a decoding mode specified by the decoding parameters and outputs the interpolated data to one of the plurality of video decoder engines;
• and
• a memory access arbitration section that receives the direct memory access request from the motion compensation device, receives direct memory access requests from the plurality of video decoder engines through the engine direct memory access buses, sets priorities to the direct memory access requests, sends the direct memory access acknowledgement to each of the motion compensation device and the plurality of video decoder engines according to a pre-defined direct memory access priority list, makes direct memory access input data and direct memory access output data streams, provides the direct memory access input data to the motion compensation device, reads data from the frame buffer and writes data to the frame buffer through the main direct memory access bus.