Methods and Apparatuses for Encoding and Decoding Object-Based Audio Signals

An audio decoding method comprising:

• receiving a downmix signal and object-based side information, the downmix signal comprising at least two downmix channel signals;
• extracting gain information from the object-based side information and generating modification information for modifying the downmix channel signals on a channel-by-channel basis based on the gain information;
• and
• modifying the downmix channel signals by applying the modification information to the downmix channel signals.

An audio encoding method comprising:

• generating a downmix signal by downmixing an object signal, the downmix signal comprising at least two downmix channel signals;
• extracting object-related information regarding the object signal and generating object-based side information based on the object-related information;
• and
• inserting gain information for modifying the downmix channel signals on a channel-by-channel basis into the object-based side information.

A computer-readable recording medium having recorded thereon a computer program for executing an audio decoding method, the audio decoding method comprising:

• receiving a downmix signal and object-based side information, the downmix signal comprising at least two downmix channel signals;
• extracting gain information from the object-based side information and generating modification information for modifying the downmix channel signals on a channel-by-channel basis based on the gain information;
• and
• modifying the downmix channel signals by applying the modification information to the downmix channel signals.

A computer-readable recording medium having recorded thereon a computer program for executing an audio encoding method, the audio encoding method comprising:

• generating a downmix signal by downmixing an object signal, the downmix signal comprising at least two downmix channel signals;
• extracting object-related information regarding the object signal and generating object-based side information based on the object-related information;
• and
• inserting gain information for modifying the downmix channel signals on a channel-by-channel basis into the object-based side information.