Method and apparatus for embedding spatial information and reproducing embedded signal for an audio signal
First Claim
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1. A method of decoding an audio signal, comprising:
- receiving, by a hardware apparatus, a downmix signal including embedded spatial information and header information associated with the spatial information, the spatial information comprising spatial parameters to upmix the downmix signal;
detecting, by a hardware apparatus, header information, the header information including a sync word indicating that the spatial information is embedded in the downmix signal, and an insertion bit length indicating a length of bits containing the spatial information;
extracting, by a hardware apparatus, frame data of the spatial information based on the insertion bit length according to an embedded order of spatial information; and
generating, by a hardware apparatus, a multi-channel audio signal by applying the frame data to the downmix signal.
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Abstract
An apparatus encodes or decodes an audio signal using a method by which compatibility with a player of a general mono or stereo audio signal can be provided in coding an audio signal and by which spatial information for a multi-channel audio signal can be stored or transmitted without a presence of an auxiliary data area. The present invention includes extracting side information embedded in non-recognizable component of audio signal components and decoding the audio signal using the extracted side information.
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12 Claims
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1. A method of decoding an audio signal, comprising:
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receiving, by a hardware apparatus, a downmix signal including embedded spatial information and header information associated with the spatial information, the spatial information comprising spatial parameters to upmix the downmix signal; detecting, by a hardware apparatus, header information, the header information including a sync word indicating that the spatial information is embedded in the downmix signal, and an insertion bit length indicating a length of bits containing the spatial information; extracting, by a hardware apparatus, frame data of the spatial information based on the insertion bit length according to an embedded order of spatial information; and generating, by a hardware apparatus, a multi-channel audio signal by applying the frame data to the downmix signal. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for decoding an audio signal, comprising:
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an embedded signal decoding unit configured to; receive a downmix signal including embedded spatial information and header information associated with the spatial information, the spatial information comprising spatial parameters to upmix the downmix signal and detect header information, the header information including a sync word indicating that the spatial information is embedded in the downmix signal, and an insertion bit length indicating a length of bits containing the spatial information; a spatial information decoding unit configured to extract frame data of the spatial information based on the insertion bit length according to an embedded order of spatial information; and a multi-channel generating unit configured to generate a multi-channel audio signal by applying the frame data to the downmix signal, wherein at least one of the embedded signal decoding unit, spatial information decoding unit, or multi-channel generating unit includes a hardware component. - View Dependent Claims (7, 8, 9, 10)
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11. A method of encoding an audio signal, comprising:
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generating, by a hardware apparatus, a raw pulse-code modulation (PCM) downmix signal by downmixing a multi-channel audio signal; generating, by a hardware apparatus, spatial information including spatial parameters to upmix the downmix signal; embedding, by a hardware apparatus, header information of the spatial information in least significant bits of the downmix signal, the header information including a sync word indicating that the spatial information is embedded in the downmix signal and an insertion bit length indicating a length of bits to contain the spatial information; and embedding, by a hardware apparatus, frame data of the spatial information based on the insertion bit length, according to an embedded order of the spatial information, wherein the embedded order indicates sequentially embedding from most significant bits to the least significant bits.
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12. An apparatus for encoding an audio signal, comprising:
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an audio signal generating unit configured to generate a raw pulse-code modulation (PCM) downmix signal by downmixing a multi-channel audio signal; a side information generating unit configured to generate spatial information including spatial parameters to upmix the downmix signal; a masking threshold computing unit configured to determine an insertion bit length to indicate a length of bits to contain the spatial information based on a masking threshold; and a bitstream reshaping unit configured to; embed header information of the spatial information in least significant bits of the downmix signal, the header information including a sync word indicating that the spatial information is embedded in the downmix signal and an insertion bit length indicating a length of bits to contain the spatial information; and embed frame data of the spatial information based on the insertion bit length, according to an embedded order of the spatial information, wherein the embedded order indicates sequentially embedding from most significant bits to the least significant bits, and wherein at least one of the audio signal generating unit, the side information generating unit, the masking threshold computing unit, or the bitstream reshaping unit includes a hardware component.
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Specification