Lg Electronics Inc.

Jong In Choi

Dong Il Han

Sang Yeon Kim

Sung Yong Kim

The present invention provides a method of scaling a partial area of a main picture, by which the partial area of the main picture can be magnified in a manner of scaling the partial area of the picture displayed on a screen like using a virtual magnifier without employing a separate expensive hardware resource. The present invention comprises a first step of making a main scaler extract image data of the partial area to be scaled from full image data according to prescribed scaling information including magnification/reduction information for the partial area of a display picture, a second step of making a sub-scaler scale the extracted image data of the partial area at a prescribed rate, and a third step of overlaying the scaled image data of the partial area on the full image data provided from the main scaler.

Method of scaling partial area of main picture

A filter, in particular, a finite impulse response (FIR) filter having a variable data input and output rate is disclosed. The FIR filter includes a first-in first-out (FIFO) architectural buffer, an address generator for circularly generating respective addresses for FIFO of data items and providing the addresses to the buffer, a filter for performing filtering on data items having different rates, which are input from the buffer, and outputting one or more data, and a controller for controlling address generation of the address generator and controlling transfer paths of data items for filtering of the filter. It is possible to variably control the input and output rate of filtering data by the FIR filter.

Finite impulse response filter

Disclosed is a memory access control apparatus capable of writing image data in an external memory or reading the image data. The memory access control apparatus comprises a memory access control unit for storing image data in a memory by a two-dimensional array according to values of a bank, a row, and a column inside the memory where the image data is to be stored calculated on the basis of coordinate values of the image data constituting one image frame and predetermined data.

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Anyang-si, South Korea

Jong In Choi