Patent ID: 8612238

Claim:
A method for decoding an audio signal, comprising: receiving a bitstream including a first three-dimensional (3D) down-mix signal having binaural 3D effect which enables a multi-channel impression over 2-channel speakers and spatial information: removing the binaural 3D effect from the first 3D down-mix signal for generating a conventional stereo down-mix using an inverse head related transfer function (HRTF), wherein the inverse HRTF is derived from a HRTF which is used for binaural 3D effect processing at an encoder-side; and generating a second 3D down-mix signal by performing a second 3D rendering operation on the conventional stereo down-mix signal, wherein the generating the second 3D down-mix signal is performed using a personalized HRTF and the spatial information, and wherein the spatial information includes at least one of a channel level difference (CLD) that indicates level differences between two channels, a channel prediction coefficient (CPC) that is a prediction coefficient used to generate a 3-channel signal based on a 2-channel signal, and an inter-channel correlation (ICC) that indicates an amount of correlation between two channels.