Convertion apparatus and convertion method

A conversion apparatus for converting a file of a format including a header, a body, and a footer, comprising:

• a converter for converting one of a file of a first format, which includes first and second data placed in a multiplexed state in the body, and a file of a second format, which includes first or second data collectively placed in the body into the other of the files.

A conversion method for converting a file of a format including a header, a body, and a footer, comprising the steps of:

• receiving one of a file of a first format wherein first and second data are placed in a multiplexed state in the body and a file of a second format wherein first or second data are placed collectively in the body;
• and
• converting one of the file of the first format and the file of the second format into the other of the files.

A program for causing a computer to execute a conversion method for converting a file of a format including a header, a body, and a footer, said program comprising:

• a conversion step of converting one of a file of a first format, which includes first and second data placed in a multiplexed state in the body, and a file of a second format, which includes first or second data collectively placed in the body, into the other of the files.