Enhancing source coding systems by adaptive transposition
AssigneeCoding Technologies AB
InventorsFredrik Henn, Kristofer Kjorling, Per Ekstrand, Lars Villemoes
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Abstract
The present invention relates to a new method for enhancement of source coding systems using high-frequency reconstruction. The invention teaches that tonal signals can be classified as either pulse-train-like or non-pulse-train-like. Relying on this classification, significant improvements on the perceived audio quality can be obtained by adaptive switching of transposers. The invention shows that the so-switched transposers must have fundamental differences in their characteristics.
Claims5
A method for enhancement of audio source coding systems using high frequency reconstruction, characterised by:
- adaptively over time selecting different methods for high frequency generation, based on whether the signal being processed has a pulse-train-like character or a non-pulse-train-like character
Dependencies are inferred from the claim text.