Patent ID: 8165889

Claim:
A media player, comprising: a network communication unit configured to search audio related information, when a network is established; an application unit configured to store an audio codec for decoding an audio signal; a processor configured to perform operations of generating a multi-channel audio signal from the audio signal, the operations comprising: receiving the audio signal including at least one frame, the frame comprising at least one time slot and at least one parameter set; determining whether a low frequency enhancement (LFE) mode is applied to a particular OTT (One-To-Two), the LFE mode being different from a normal mode; extracting time slot information in variable bit length, the time slot information indicating a time slot to which a parameter set is applied; extracting LFE parameter band information in fixed bit length, the LFE parameter band information indicating a number of parameter bands for the particular OTT box; and converting the audio signal into the multi-channel audio signal by applying the parameter of the parameter set to a parameter band of the time slot, based on the LFE parameter band information and the time slot information, wherein extracting the time slot information comprises: extracting a number of time slots and a number of parameter sets from the audio signal to identify time slot information; determining a bit length of the time slot information, the bit length being variable according to the number of time slots and the number of parameter sets; and extracting the time slot information based on the bit length, wherein a number of time slot information is equal to the number of parameter sets; an audio subsystem configured to convert the multi-channel audio signal into a multi- channel analog output signal; and a speaker configured to output at least one channel of the multi-channel analog output signal.