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US 9,177,569 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.
Claims4
A high band signal decoding apparatus comprising:
- a high band signal generating unit to generate a high band signal by using a decoded low band signal;
- a noise generation unit to generate a noise signal based on an extent of voicing in the decoded low band signal;
- and
- a noise addition unit to add the noise signal to the high band signal.
1 more element
A high band decoding method comprising:
- generating a high band signal by using a decoded low band signal;
- generating a noise signal based on an extent of voicing in the decoded low band signal;
- and
- adding the noise signal to the high band signal.
1 more element
A high band decoding method comprising:
- generating a high band signal by using a decoded low band signal in a linear prediction domain;
- generating a noise signal based on an extent of voicing in the decoded low band signal;
- and
- adding the noise signal to the high band signal.
1 more element
Dependencies are inferred from the claim text.