A UHD frame rate up-conversion system that reduces memory bandwidth requirements

Abstract

The invention discloses a storage-bandwidth-requirement lowered ultra-high definition frame rate up-conversion system. An input module receives ultra-high definition video image streams, high definition video images are obtained through downsampling, and original images and the images obtained after downsampling are stored in an off-chip storage device; a motion estimation module reads in pixel data of a searching window in the high definition from the off-chip storage device and calculates corresponding motion vectors, and the motion vectors are scaled to serve as rough values of the motion vectors in the ultra-high definition; a vector post-processing module receives the rough values of the motion vectors and carries out further thinning and smoothing processing on the rough values to obtain final values of the motion vectors; an interpolation module reads in reference pixel blocks corresponding to the final values of the motion vectors from the off-chip storage device and calculates interpolation pixel blocks. According to the storage-bandwidth-requirement lowered ultra-high definition frame rate up-conversion system, ultra-high definition frame rate up-conversion is achieved by only reading the searching window in the high definition, the off-chip storage bandwidth requirement is lowered, the in-chip storage area and the access and storage bandwidth are decreased, and meanwhile motion estimation errors caused by reducing the definition are overcome.

Description

technical field [0001] The present invention relates to the field of video processing, in particular to a video processing system used for reducing storage bandwidth requirements in ultra-high-definition frame rate up-conversion. Background technique [0002] In recent years, people's subjective demand for high-quality visual enjoyment and the objective conditions of the rapid development of semiconductor technology have jointly promoted the vigorous development of the UHD TV industry. However, due to the limitation of the bandwidth of the current transmission system, UHD TV programs can only be transmitted at a lower frame rate. At the same time, the refresh rate of large-screen display devices has been greatly improved, and the video frame rate is lower than the screen refresh rate. This mismatch directly leads to image smearing, pauses, blurring, etc., and the display effect is not good. As an important video post-processing method, the video frame rate up-conversion tec...

AI Technical Summary

Problems solved by technology

In the existing patented technology (such as publication number CN102067583A), some people use video compression methods to reduce bandwidth requirements. Although such methods can be used in ultra-high-definition frame rate up-conversion systems, they greatly increase the computational complexity of the entire system

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