Patent ID: 7561745

Claim:
A method of making an input file using meta representation of compression of graphics data, comprising: (a) preparing an extensible MPEG-4 textual format (XMT) schema, wherein the XMT schema defines a compression node (BitWrapper node) containing information regarding the object data that is to be compressed, encoding parameters for compressing the object data, BitWrapperEncodingHints including a format of a compressed bitstream, and AFXConfig specifying the type of decoders available for decoding a transmitted bitstream; (b) preparing an XMT2BIFS style sheet supporting conversion of an input XMT file into a scene file according to the XMT schema, and an XMT2MUX style sheet supporting conversion of the input XMT file into a mux file according to the XMT schema; (c) making a scene file and a mux file by parsing the input XMT file according to the XMT schema using the XMT2BIFS and XMT2MUX style sheets; (d) determining whether the scene file obtained as the result of parsing contains uncompressed graphics object data; (e) when it is determined that the uncompressed graphics object data is present, sending the uncompressed graphics object data to an animation framework extension (AFX) encoder unit, storing object data and values of encoding parameters required for data compression by operation of an AFX parser in the AFX encoder unit, compressing the uncompressed graphics object data into a compressed bitstream and generating a modified scene file and a modified mux file, and using encoding parameters included in the scene file; and (f) transmitting the compressed bitstream to a decoder available for decoding the transmitted bitstream.