Patent ID: 7986846

Claim:
A video decoder of a digital broadcast receiver, comprising: a resizing control unit for generating a resizing control signal for resizing a received video data; a header analyzer for analyzing header information from a decoded video stream and separating and outputting video data; a variable length decoder for decoding the video data output from the header analyzer into an original pixel data with an original data size using a variable length table; a dequantizer for dequantizing the decoded video data; an Inverse Discrete Cosine Transform (IDCT) unit for resizing and converting the dequantized frequency-domain video data into a two dimensional spatial domain video data using the resizing control signal; and a movement compensator unit for compensating for movement of a movement compensation data corresponding to one of the inverse-transformed video data and the separated video data, wherein the IDCT unit comprises: a Y axis resizer for selecting an N point inverse discrete cosine transformer using a Y axis control signal of the resizing control signal; an N number of Y axis inverse discrete cosine transformers including the selected N point inverse discrete cosine transformer for inverse discrete cosine transforming Y axis video data in a resized area; an X axis resizer for selecting an M point inverse discrete cosine transformer using an X axis control signal of the resizing control signal; and an M number of X axis inverse discrete cosine transformers including the selected M point inverse discrete cosine transformer for inverse discrete cosine transforming X axis video data in a resizing area, the X axis video data being stored in a Y buffer.