Input file generating method and system using meta representation of compression of graphics data, and AFX coding method and apparatus

A system of generating an input file using meta representation of graphics data compression, the system comprising:

• an extensible MPEG-4 textual format (XMT) schema defining:
• a compression node which specifies graphics object data to be compressed, and includes an encoding parameter used to compress the graphics object data,
• a BitWrapperEncodingHints including a format in which the graphics object data is compressed into a bitstream, and
• an AFXConfig specifying a type of a decoder to decide a transmitted bitstream;
• an XMT2BIFS style sheet to support conversion of an input XMT file containing the graphics object data into a scene file based on the XMT schema;
• an XMT2MUX style sheet to support conversion of the input XMT file into a mux file based on the XMT schema;
• an XMT parser to generate the scene and mux files by parsing the input XMT file according to the XMT schema, using the XMT2BIFS and XMT2MUX style sheets;
• a compression determination unit to determine whether the generated scene file contains uncompressed graphics object data;
• and
• an AFX encoding unit to compress the uncompressed graphics object data into a bitstream using the encoding parameter in the scene file, and to obtain a modified scene file and a modified mux file using the XMT2BIFS and XMT2MUS style sheets, in response to the compression determination unit determining that the graphics object data is uncompressed.

An AFX encoding apparatus comprising:

• an AFX parser to detect at least one compression node from a scene file containing a BitWrapper node, and to store graphics object data and an encoding parameter which are included in the compression node of the scene file in response to the graphics object data being present in a node field of the compression node;
• an object data storage unit to store the graphics object data received from the AFX parser;
• an encoding parameter storage unit to store the encoding parameter received from the AFX parser;
• an encoding unit to match the stored graphics object data, and to compress the graphics object data received from the object data storage unit into a bitstream using the encoding parameter received from the encoding parameter storage unit;
• and
• an input file generator to generate a modified scene file by deleting the graphics object data and encoding parameter from the compression node of the scene file, and a modified mux file modified such that a name of a file output from a BIFS encoding unit reflects a name of the modified scene file, in response to the graphics object data being included in the node field of the compression node detected by the AFX parser.

An AFX encoding method comprising:

• detecting at least one compression node from a scene file which contains a BitWrapper node;
• storing a node containing graphics object data, and an encoding parameter which are included in the detected compression node;
• compressing the graphics object data into a bitstream with the encoding parameter by using an encoding unit which matches the node containing the stored graphics object data;
• and
• generating a modified scene file by deleting the graphics object data and the encoding parameter from the compression node of the scene file, and a modified mux file modified such that a name of a file output from a binary format of scene (BIFS) encoding unit reflects a name of the modified scene file.

At least one computer readable medium storing instructions that control at least one processor to perform a method of generating an input file using meta representation of graphics data compression, the method comprising:

• preparing an extensible MPEG-4 textual format (XMT) schema, wherein the XMT schema defines:
• a compression node including graphics data having at least depth image based representation (DIBR) data to be compressed and having an encoding parameter required to compress the graphics data,
• a BitWrapperEncodingHints including a graphics compression bitstream format, and
• an AFXConfig specifying a type of a decoder to decode a transmitted bitstream;
• preparing an XMT2BIFS style sheet supporting conversion of an input XMT file containing the graphics data 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;
• generating the scene and mux files by parsing the input XMT file according to the XMT schema using the XMT2BIFS and XMT2MUX style sheets;
• determining whether the generated scene file includes uncompressed graphics object data;
• and
• compressing the uncompressed graphics object data into a bitstream and generating a modified scene file and a modified mux file, using the encoding parameter included in the scene file, in response to determining that the generated scene file includes the uncompressed graphics object data.

At least one computer readable medium storing instructions that control at least one processor to perform an AFX encoding method, the method comprising:

• detecting at least one compression node from a scene file which contains a BitWrapper node;
• storing a node containing graphics object data, and an encoding parameter which are included in the detected compression node;
• compressing the graphics object data into a bitstream with the encoding parameter by using an encoding unit which matches the node containing the stored graphics object data;
• and
• generating a modified scene file by deleting the graphics object data and the encoding parameter from the compression node of the scene file, and a modified mux file modified such that a name of a file output from a binary format of scene (BIFS) encoding unit reflects a name of the modified scene file.

A method of generating an input file using meta representation of graphics data compression, the method comprising:

• preparing an extensible MPEG-4 textual format (XMT) schema, wherein the XMT schema defines:
• a compression node including graphics data to be compressed and having an encoding parameter required to compress the graphics data,
• a BitWrapperEncodingHints including a graphics compression bitstream format, and
• an AFXConfig specifying a type of a decoder to decode a transmitted bitstream;
• preparing an XMT2BIFS style sheet supporting conversion of an input XMT file containing the graphics data 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;
• generating the scene and mux files by parsing the input XMT file according to the XMT schema using the XMT2BIFS and XMT2MUX style sheets;
• determining whether the generated scene file includes uncompressed graphics object data;
• and
• compressing the uncompressed graphics object data into a bitstream and generating a modified scene file and a modified mux file, using the encoding parameter included in the scene file, in response to determining that the generated scene file includes the uncompressed graphics object data;
• wherein the compression node comprises:
• a node field including the graphics object data to be compressed,
• a buffer field to transmit a compressed bitstream in the compression node as in-band data,
• a URL field to transmit the compressed bitstream in the compression node as out-band data,
• a type field indicating a manner in which the graphics object data in the node field is compressed, and
• the encoding parameter required to compress the graphics object data;
• wherein the buffer field and the URL field are not compatible with one another;
• and
• wherein the BitWrapperEncodingHints is included in an objectDescriptor with a binary identification that is the same as a URL identification defined in a URL field in the compression node, and further specifies a name of a file storing the compressed bitstream and type information of a compression format of bitstream;
• and
• wherein the AFXConfig further comprises information regarding a type of a decoder used to decode the compressed bitstream of the graphics object data in the node field of the compression node, the compressed bitstream being compressed by an AFX encoding unit and transmitted using a URL.

A method of generating an input file using meta representation of graphics data compression, the method comprising:

• preparing a first style sheet supporting conversion of an input XMT file containing graphics data into a scene file according to an XMT schema, and a second style sheet supporting converstion of the input XMT file into a mux file according to the XMT schema;
• generating the scene and mux files by parsing the input XMT file according to the XMT schema using the first and second style sheets;
• determining whether the generated scene file includes uncompressed graphics object data;
• and
• compressing the uncompressed graphics object data into a bitstream and generating a modified scene file and a modified mux file, using an encoding parameter included in the scene file, in response to determining that the generated scene file includes the uncompressed graphics object data.

An AFX encoding apparatus comprising:

• an AFX parser to detect at least one compression node from a scene file, and to store graphics object data and an encoding parameter from the compression node in response to the graphics object data being present in a node field of the compression node;
• an encoding unit to match the graphics object data, and to compress the graphics object data into a bitstream using the encoding parameter;
• and
• an input file generator to generate a modified scene file by deleting the graphics object data and encoding parameter from the compression node of the scene file, and to generate a modified mux file to indicate a name of the modified scene file, in response to the graphics object data being included in the node field of the compression node detected by the AFX parser.