Image zooming device

Abstract

The invention provides an image scaler, which comprises a clock couple unit and an image zooming unit. The clock couple unit is used for generating the output clock of couple input clocks. The image zooming unit comprises a timing sequence synchronous module, a data buffering module, a phase position computing module and a zooming filtering module. The timing sequence synchronous module is used for outputting the clock and generating the timing sequence which is synchronous with input source image data. The data buffering module is used for using the input clock to receive the source image data and using the synchronous timing sequence to output the source image data so as to buffer the source image data; the phase position computing module is used for calculating the phase position of the synchronous timing sequence; the zooming filtering module is used for zooming filtering treating on the buffered source image data by the phase position. The image scaler provides a good modular structure, is clear and concise, has simple design, strong reusability and readability, small chip design area and low cost.

Description

technical field The invention relates to the field of digital video, in particular to an image scaler. Background technique The digital video field employs image scalers to handle image scaling. Figure 1 shows a structural diagram of a conventional image scaler, including: Input data synchronizer (input data synchronizer) 110, is used for receiving the source image pixel data of SCLK frequency, and converts to high-speed clock domain; Line buffer (line buffer) 120, used for large-capacity high-speed data buffer; FIFO 130 for clock domain isolation A vertical interpolator (V interpolator) 140, configured to perform scaling processing in the vertical direction; A horizontal interpolator (H interpolator) 150, configured to perform scaling processing in the horizontal direction; An interpolator line buffer (ILB for short) 160 is used to provide the vertical interpolator 140 with pre-scanning lines. During the process of realizing the present invention, the inventors...

AI Technical Summary

Problems solved by technology

The present invention aims to provide an image scaler, which can solve the problems of complex structure, high power consumption and high failure rate of the existing image scaler

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