Temporal Noise Shaping
From Hydrogenaudio Knowledgebase
Temporal Noise Shaping is a technique for reshaping the quantization noise over time (hence the term "Temporal"). The objective is to reduce artifacts in transient and speech signals. TNS was introduced into MPEG-2 AAC. TNS is not available in MP3. TNS is not applied for short blocks, only for long blocks.
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