Logic Design And Verification Of Motion Estimation Algorithm Based On MPEG-4

With the rapid development of multimedia technology, the importance of video decodingtechnology increasingly highlights, and some new video decoding technologies constantlyemerges. MPEG-4is an international standard organization, and the ISO/IEC moving pictureis a new generation of a new generation of video codec standards which was worked out bythe expert group. And this coding standard can achieve very high coding efficiency andsatisfied the low broadband and high quality network video’s application needs. Furthermore,this standard has a low demand for transmission rate; can use a very narrow broadband,through the frame reconstruction technique, compression and transmit data, so that with theleast amount of data to get the best image quality.The motion estimation algorithm as the key technique in the filed of video coding whichcan directly affect the efficiency and quality of data compression. The more accurate ofmotion estimation, the higher coding efficiency and better video quality we can get.Therefore, studying and designing an efficient and fast motion estimation algorithm hasbecome an important direction of video compression technology. This article has launched astudy of the motion estimation algorithm and carried out the logic design and testing for themotion estimation module.In this paper, according to the image information and image feature based classification,discusses the existing common motion estimation algorithm principle and realization method,and their feartures are analyzed. Emphatically introduces the block matching motionestimation principle and research status quo, in full knowledge of block matching motionestimation techniques, and consider the motion vector statistic and distribution characteristicsof foundation, choose to use large diamond template to determine the search direction, with asmall diamond pattern for fine positioning search, to find the optimal motion vector, whichnot noly increases the search accuracy, and reduce the possibility of trapping in localoptimum. Use of a new access method, according to the module check number, each taking into the9pixel value, after the use is thrown out, it will be able to save the searching timeand data storage space. The residual value is calculated using PE array, a total of8PEmodules together for operation, improves the operation speed, saving operation time.After the completion of logic design, Ncverilog software was employed to carry out, theresults obtained with the expected goal is the same. The design used in the video chip hasbeen taped out.