METHOD AND DEVICE FOR UNIFIED TIME-DOMAIN / FREQUENCY DOMAIN CODING OF A SOUND SIGNAL
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United States of America Patent
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Sep 26, 2024
app pub date -
Jan 5, 2022
filing date -
Jan 8, 2021
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Abstract
A unified time-domain/frequency-domain coding method and device for coding an input sound signal comprise a classifier of the input sound signal into one of a plurality of sound signal categories comprising an unclear signal type category showing that the nature of the input sound signal is unclear. One of a plurality of coding sub-modes is selected for coding the input sound signal if the input sound signal is classified in the unclear signal type category. A mixed time-domain/frequency-domain encoder codes the input sound signal using the selected coding sub-mode. The mixed time-domain/frequency-domain encoder comprises a selector of frequency bands and allocator of bits for selecting frequency bands to quantize and for distributing a bit budget available to quantization between the selected frequency bands. Corresponding sound signal decoder and decoding method are also provided.
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