Patent ID: 7831435
Filing Date: 2010-11-09
Classification: G10L,H04R,H04S

Abstract:
1. A method of decoding an audio signal performed by a broadcast playback system, comprising: receiving an audio signal including a downmix signal and spatial information, the spatial information including at least one frame having at least one time slot and at least one parameter set, the parameter set including at least one parameter; extracting time slot information in variable bit length, the time slot information indicating a time slot to which a parameter set is applied; determining that a dual mode is selected, the dual mode indicating two modes for a low band range and a high band range; extracting mode information for the low band range and the high band range, the mode information determining a type of parameter being used for the low band range or the high band range; extracting dual mode parameter band information indicating a number of parameter bands for the low band range; and converting the audio signal into a multi-channel audio signal by applying the parameter to the downmix signal based on the time slot information and the dual mode parameter band information, wherein the process of extracting time slot information comprises: displaying information regarding the multi-channel audio signal; transmitting the multi-channel audio signal or the audio signal to an external unit; converting the multi-channel audio signal into multi-channel analog output signal; and outputting at least one channel of the multi-channel analog output signal.