Method and apparatus for improving the coding of side information required for coding a Higher Order Ambisonics representation of a sound field
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United States of America Patent
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Jun 5, 2018
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Nov 17, 2016
app pub date -
Dec 19, 2014
filing date -
Jan 8, 2014
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Abstract
Higher Order Ambisonics represents three-dimensional sound independent of a specific loudspeaker set-up. However, transmission of an HOA representation results in a very high bit rate. Therefore compression with a fixed number of channels is used, in which directional and ambient signal components are processed differently. For coding, portions of the original HOA representation are predicted from the directional signal components. This prediction provides side information which is required for a corresponding decoding. By using some additional specific purpose bits, a known side information coding processing is improved in that the required number of bits for coding that side information is reduced on average.
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