Methods and apparatuses for encoding and decoding object-based audio signals

An audio decoding method comprising:

• receiving, by an audio decoding apparatus, a downmix signal comprising at least one object signal, and object-based side information generated when the at least one object signal is downmixed into the downmix signal;
• receiving, by the audio decoding apparatus, control information for controlling position or level of at least one object signal;
• receiving, by the audio decoding apparatus, a HRTF (Head-Related Transfer Function) being a transfer function which describes the transmission of sound waves between a sound source at an arbitrary position and the eardrum;
• generating, by the audio decoding apparatus, binaural parameter information using the object-based side information, the control information and the HRTF;
• and
• generating, by the audio decoding apparatus, a binaural signal by processing the downmix signal using the binaural parameter information, wherein the binaural signal is virtual 3D signal.