Audio signal processing using pilot based coding
First Claim
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1. A system for processing a signal, the system comprising:
- an audio coding apparatus configured to;
receive a downmix signal and spatial information,obtain, by an audio coding apparatus, a pilot reference value and one or more pilot difference values from the spatial information,entropy-decode the pilot difference values,obtain data elements of a current group included in a current frame using the pilot reference value and the entropy-decoded pilot difference values, without using data elements of an other frame, andgenerate a multi-channel signal by applying the data elements of the current group to the downmix signal,wherein;
the pilot reference value is dependent on each of the data elements of the current group, and is not dependent on the data elements of the other frame,a quantity of the pilot difference values is equal to a quantity of the data elements of the current group,the pilot reference value is a single value which applies to all of the data elements of the current group, andeach pilot difference value corresponds to each data element of the current group.
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Abstract
An apparatus for processing a signal and method thereof are disclosed. Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes the steps of obtaining a reference value corresponding to a plurality of data and a difference value corresponding to the reference value and entropy-decoding the difference value and obtaining the data using the reference value and the entropy-decoded difference value.
79 Citations
16 Claims
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1. A system for processing a signal, the system comprising:
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an audio coding apparatus configured to; receive a downmix signal and spatial information, obtain, by an audio coding apparatus, a pilot reference value and one or more pilot difference values from the spatial information, entropy-decode the pilot difference values, obtain data elements of a current group included in a current frame using the pilot reference value and the entropy-decoded pilot difference values, without using data elements of an other frame, and generate a multi-channel signal by applying the data elements of the current group to the downmix signal, wherein; the pilot reference value is dependent on each of the data elements of the current group, and is not dependent on the data elements of the other frame, a quantity of the pilot difference values is equal to a quantity of the data elements of the current group, the pilot reference value is a single value which applies to all of the data elements of the current group, and each pilot difference value corresponds to each data element of the current group. - View Dependent Claims (2, 3, 4, 5)
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6. An audio coding apparatus for processing a signal, the audio coding apparatus comprising:
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an obtaining part configured to; receive a downmix signal and spatial information, obtain a pilot reference value and one or more pilot difference values from the spatial information, and obtain data elements of a current group included in a current frame using the pilot reference value and the entropy-decoded pilot difference values, without using data elements of an other frame; a decoding part configured to entropy-decode the pilot difference values; and a reconstructing part configured to generate a multi-channel signal by applying the data elements of the current group to the downmix signal, wherein; the pilot reference value is dependent on each of the data elements of the current group, and is not dependent on the data elements of the other frame, a quantity of the pilot difference values is equal to a quantity of the data elements of the current group, the pilot reference value is a single value which applies to all of the data elements of the current group, and each pilot difference value corresponds to each data element of the current group. - View Dependent Claims (7, 8, 9, 10)
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11. A method for processing a signal, the method comprising:
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receiving a downmix signal and spatial information; obtaining, by an audio coding apparatus, a pilot reference value and one or more pilot difference values from the spatial information; entropy-decoding the pilot difference values; obtaining data elements of a current group included in a current frame using the pilot reference value and the entropy-decoded pilot difference values, without using data elements of an other frame; and generating a multi-channel signal by applying the data elements of the current group to the downmix signal, wherein; the pilot reference value is dependent on each of the data elements of the current group, and is not dependent on the data elements of the other frame, a quantity of the pilot difference values is equal to a quantity of the data elements of the current group, the pilot reference value is a single value which applies to all of the data elements of the current group, and each pilot difference value corresponds to each data element of the current group. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification