Hybrid audio encoder and hybrid audio decoder which perform coding or decoding while switching between different codecs
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United States of America Patent
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Mar 1, 2016
Grant Date -
Apr 11, 2013
app pub date -
Jun 14, 2011
filing date -
Jun 14, 2010
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Abstract
A new hybrid audio decoder and a new hybrid audio encoder having block switching for speech signals and audio signals are provided. Currently, very low bitrate audio coding methods for speech and audio signals are proposed. These audio coding methods cause very long delays. Generally, in coding an audio signal, an algorithm delay tends to be long to achieve higher frequency resolution. In coding a speech signal, the delay needs to be reduced because the speech signal is used for telecommunication. To balance fine coding quality for speech and audio input signals with very low bitrate, a combination of a low delay filter bank like AAC-ELD and a CELP coding method is provided.
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