APPARATUS AND METHOD OF TRANSCODING VIDEO SNAP IMAGE

An apparatus and method of transcoding a video snap image is disclosed. The apparatus includes a video decoder for performing a variable length decoding (VLD), inverse discrete cosine transform (IDCT), and inverse quantization with respect to an input bit stream to display the decoded bit stream, a DC extraction section for extracting DC components from discrete cosine transform (DCT) coefficients of variable-length-decoded macro blocks, an adder for averaging the extracted DC components, a differential pulse code modulation (DPCM) section for obtaining and outputting a difference value between the DC component averaged by the adder or the DC component outputted from the DC extraction section and a DC component of a previous macro block, a Huffman encoding section for Huffman-encoding the difference value outputted from the DPCM section, and a storage device for storing a Huffman-encoded snap image and the video bit stream.