Encoding device and method, decoding device and method, and program

An encoding method performed by an encoding device, the method comprising:

• encoding audio data of an object;
• encoding metadata including position information of the object;
• determining sense-of-distance control information for sense-of-distance control processing to be performed on the audio data;
• encoding the sense-of-distance control information;
• and
• multiplexing the coded audio data, the coded metadata, and the coded sense-of-distance control information to generate coded data.

A program for causing a computer to execute processing including the steps of:

• encoding audio data of an object;
• encoding metadata including position information of the object;
• determining sense-of-distance control information for sense-of-distance control processing to be performed on the audio data;
• encoding the sense-of-distance control information;
• and
• multiplexing the coded audio data, the coded metadata, and the coded sense-of-distance control information to generate coded data.

A decoding device comprising:

• a demultiplexer that demultiplexes coded data to extract coded audio data of an object, coded metadata including position information of the object, and coded sense-of-distance control information for sense-of-distance control processing to be performed on the audio data;
• an object decoding unit that decodes the coded audio data;
• a metadata decoding unit that decodes the coded metadata;
• a sense-of-distance control information decoding unit that decodes the coded sense-of-distance control information;
• a sense-of-distance control processing unit that performs the sense-of-distance control processing on the audio data of the object on a basis of the sense-of-distance control information;
• and
• a rendering processing unit that performs rendering processing on a basis of the audio data obtained by the sense-of-distance control processing and the metadata to generate reproduction audio data for reproducing a sound of the object.

A decoding method performed by a decoding device, the method comprising:

• demultiplexing coded data to extract coded audio data of an object, coded metadata including position information of the object, and coded sense-of-distance control information for sense-of-distance control processing to be performed on the audio data;
• decoding the coded audio data;
• decoding the coded metadata;
• decoding the coded sense-of-distance control information;
• performing the sense-of-distance control processing on the audio data of the object on a basis of the sense-of-distance control information;
• and
• performing rendering processing on a basis of the audio data obtained by the sense-of-distance control processing and the metadata to generate reproduction audio data for reproducing a sound of the object.

A program for causing a computer to execute processing including the steps of:

• demultiplexing coded data to extract coded audio data of an object, coded metadata including position information of the object, and coded sense-of-distance control information for sense-of-distance control processing to be performed on the audio data;
• decoding the coded audio data;
• decoding the coded metadata;
• decoding the coded sense-of-distance control information;
• performing the sense-of-distance control processing on the audio data of the object on a basis of the sense-of-distance control information;
• and
• performing rendering processing on a basis of the audio data obtained by the sense-of-distance control processing and the metadata to generate reproduction audio data for reproducing a sound of the object.