Method for decoding an audio signal
First Claim
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1. A method of decoding an audio signal, comprising:
- receiving the audio signal including an audio descriptor, a downmix signal and a spatial information signal, the audio descriptor including basic information of an audio codec, the basic information including at least one of a transmission rate of the received audio signal, a number of channels, a sampling frequency, an identifier indicating a currently used codec, the spatial information signal including channel level difference (CLD) indicating an energy difference between channels, inter-channel coherences (ICC) meaning a correlation between channels for a OTT box, and channel configuration information including a division identifier indicating a signal is connected to the OTT box and a non-division identifier indicating a signal is connected to an output channel;
generating a multi-channel audio signal from the downmix signal using one or more OTT (One-To-Two) boxes and the channel configuration information; and
mapping the multi-channel audio signal to a speaker using speaker mapping information, the speaker mapping information being extracted from the spatial information signal,wherein the downmix signal is generated by downmixing a multi-channel audio signal.
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Abstract
The invention relates to a method for decoding an audio signal, to allow an audio signal to be compressed and transferred more efficiently. The inventive method comprises steps of receiving an audio signal with spatial information signal, obtaining location information using the number of time slot and parameter of audio signal, establishing a multi-channel audio signal by applying spatial information signal to down-mix signal, and performing a multi-channel array for a multi-channel audio signal in response to the output channel.
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Citations
12 Claims
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1. A method of decoding an audio signal, comprising:
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receiving the audio signal including an audio descriptor, a downmix signal and a spatial information signal, the audio descriptor including basic information of an audio codec, the basic information including at least one of a transmission rate of the received audio signal, a number of channels, a sampling frequency, an identifier indicating a currently used codec, the spatial information signal including channel level difference (CLD) indicating an energy difference between channels, inter-channel coherences (ICC) meaning a correlation between channels for a OTT box, and channel configuration information including a division identifier indicating a signal is connected to the OTT box and a non-division identifier indicating a signal is connected to an output channel; generating a multi-channel audio signal from the downmix signal using one or more OTT (One-To-Two) boxes and the channel configuration information; and mapping the multi-channel audio signal to a speaker using speaker mapping information, the speaker mapping information being extracted from the spatial information signal, wherein the downmix signal is generated by downmixing a multi-channel audio signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus of decoding an audio signal, comprising:
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a receiving unit receiving the audio signal including an audio descriptor, a downmix signal and a spatial information signal, the audio descriptor including basic information of an audio codec, the basic information including at least one of a transmission rate of the received audio signal, a number of channels, a sampling frequency, an identifier indicating a currently used codec, the spatial information signal including channel level difference (CLD) indicating an energy difference between channels, inter-channel coherences (ICC) meaning a correlation between channels for a OTT box, and channel configuration information including a division identifier indicating a signal is connected to the OTT box and a non-division identifier indicating a signal is connected to an output channel; a multi-channel generating unit generating a multi-channel audio signal from the downmix signal using one or more OTT (One-To-Two) boxes and the channel configuration information; and a speaker mapping unit mapping the multi-channel audio signal to a speaker using speaker mapping information, the speaker mapping information being extracted from the spatial information signal, wherein the downmix signal is generated by downmixing a multi-channel audio signal. - View Dependent Claims (9, 10, 11, 12)
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Specification