A FPGA-based video sub-pixel brightness interpolation method and device

Abstract

Disclosed are FPGA-based (field programmable gate array-based) video sub-pixel brightness interpolation method and device. The method includes: reading integer pixel data from a FPGA on-chip SRAM (static random access memory), subjecting the data to 1 / 2 horizontal interpolation, and storing interpolation results in the SRAM; reading integer pixel data from the FPGA on-chip SRAM, subjecting the data to 1 / 2 vertical interpolation, and storing interpolation results in the SRAM; reading 1 / 2 horizontal interpolation pixel or 1 / 2 vertical interpolation pixel data from the FPGA on-chip SRAM, subjecting the data to 1 / 2 central interpolation, and storing interpolation results in the SRAM; reading integer pixels or 1 / 2 interpolation pixels according to positions of target pixels during motion estimation, subjecting the pixels to 1 / 4 interpolation, and directly applying the interpolation results to calculation of motion vector of the 1 / 4 interpolation pixels or directly applying the 1 / 2 interpolation pixels to the calculation of motion vector of the 1 / 2 pixels. The FPGA-based video sub-pixel brightness interpolation method and device can save hardware cost.

Description

【Technical field】 [0001] The present invention relates to a video image luminance interpolation method and its device, in particular to an FPGA-based video sub-pixel luminance interpolation method and its device. 【Background technique】 [0002] At present, digital video has been widely used, but the amount of information of digital video is large, the bandwidth required for transmission is high, and the storage capacity required for storage is large, so it is generally necessary to compress digital video first. Among digital video compression standards, the H.264 / AVC standard, referred to as H.264, has been more and more widely used due to its compression efficiency twice that of MEPG2 under the same image quality. [0003] Inter-frame coding is a key technology in the H.264 / AVC standard, in which high-precision sub-pixel compensation is a core algorithm of inter-frame coding, H.264 high-precision sub-pixel compensation performs 1 / 4 interpolation, and use the interpolation...

AI Technical Summary

Problems solved by technology

At the same time, the 6-tap filter used in these methods and devices generally adopts independent horizontal and vertical filters, and its disadvantage is that it needs to occupy a large amount of external memory bandwidth, and the number of required filters is large, which increases the hardware cost.

Images