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US 10,255,928 B2Granted
Apparatus, medium and method to encode and decode high frequency signal
AssigneeSamsung Electronics Co., Ltd.
InventorsKi-hyun Choo, Eun-mi Oh, Ho-sang Sung, Jung-hoe Kim, Mi-young Kim
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Abstract
A method and apparatus to encoding or decoding an audio signal is provided. In the method and apparatus, a noise-floor level to use in encoding or decoding a high frequency signal is updated according to the degree of a voiced or unvoiced sound included in the signal.
Claims5
An apparatus for generating an extended band signal, the apparatus comprising:
- at least one processor configured to:
- decode a low band signal in a time domain from a bitstream;
- generate an upper band signal by using the decoded low band signal;
- generate random noise;
- mix the random noise to the upper band signal, based on a parameter obtained from an extent of voicing in a low band signal, so as to obtain a reconstructed upper band signal;
- and
- synthesize the decoded low band signal and the reconstructed upper band signal in the time domain, for reproduction of the extended band signal,
- wherein the extended band signal has at least one of audio characteristic and speech characteristic.
5 more elements
A method of generating an extended band signal, the method comprising:
- decoding a low band signal in a time domain from a bitstream;
- generating an upper band signal by using the decoded low band signal;
- generating random noise;
- mixing the random noise to the upper band signal, based on a parameter obtained from an extent of voicing in a low band signal, so as to obtain a reconstructed upper band signal;
- and
- synthesizing the decoded low band signal and the reconstructed upper band signal in the time domain for reproduction of the extended band signal,
- wherein the extended band signal has at least one of audio characteristic and speech characteristic.
4 more elements
Dependencies are inferred from the claim text.