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SLOT POSITION CODING OF SYNTAX OF SPATIAL AUDIO APPLICATION

  • US 20110044459A1
  • Filed: 08/20/2010
  • Published: 02/24/2011
  • Est. Priority Date: 08/30/2005
  • Status: Active Grant
First Claim
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1. A broadcast playback system, comprising:

  • a receiver configured to receive broadcast signal including an audio signal generated by downmixing a multi-channel audio signal;

    an application unit configured to store an audio codec for decoding an audio signal;

    a processor configured to perform operations of generating the multi-channel audio signal from the audio signal, the operations comprising;

    extracting time slot information in a variable bit length, the time slot information indicating a time slot to which a parameter set is applied;

    extracting parameter band information in a fixed bit length, the parameter band information indicating a number of parameter bands for an entire frequency domain of the audio signal;

    converting the audio signal into the multi-channel audio signal by applying a parameter of the parameter set to a parameter band of the time slot, based on the time slot information and the parameter band 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 the time slot information is equal to the number of parameter sets and the time slot information includes an absolute value indicating a time slot to which a first parameter set is applied or a difference value indicating a time slot to which a following parameter set is applied,wherein the absolute value is determined within a first maximum range, the first maximum range being calculated using the number of parameter sets and the number of time slots, andwherein the difference value is determined within a second maximum range, the second maximum range being calculated according to previous time slot information associated with a previous parameter set;

    a network interface configured to transmit the multi-channel audio signal or the audio signal to an external unit;

    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.

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