KR20200028037A - 향상된 스펙트럼 확장을 사용하여 양자화 잡음을 감소시키기 위한 압신 장치 및 방법 - Google Patents
향상된 스펙트럼 확장을 사용하여 양자화 잡음을 감소시키기 위한 압신 장치 및 방법 Download PDFInfo
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Abstract
Description
도 2a는 일 실시예 하에서, 복수의 단시간 세그먼트들로 분할된 오디오 신호를 도시한 도면.
도 2b는 일 실시예 하에서, 단시간 세그먼트들의 각각에 걸친 광대역 이득의 적용 후 도 2a의 오디오 신호를 도시한 도면.
도 3a는 일 실시예 하에서, 오디오 신호를 압축하는 방법을 도시하는 흐름도.
도 3b는 일 실시예 하에서, 오디오 신호를 확장시키는 방법을 도시하는 흐름도.
도 4는 일 실시예 하에서, 오디오 신호를 압축하기 위한 시스템을 도시하는 블록도.
도 5는 일 실시예 하에서, 오디오 신호를 확장시키기 위한 시스템을 도시하는 블록도.
도 6은 일 실시예 하에서, 복수의 단시간 세그먼트들로의 오디오 신호의 분할을 도시하는 도면.
104: 압축 구성요소 106: 인코더
110: 네트워크 112, 502: 디코더
114: 확장 구성요소 116: 오디오 출력 신호
401: 입력 오디오 신호 402: QMF 필터뱅크
404: 압신 제어 유닛 406: 압축기
410: 합성 필터뱅크 412: 코어 인코더
Claims (3)
- 다수의 채널들을 포함하는 오디오 신호를 압축하는 방법에 있어서:
상기 오디오 신호의 시간-주파수 타일 표현을 수신하는 단계로서, 상기 오디오 신호의 상기 시간-주파수 타일 표현은 상기 오디오 신호의 시간 슬롯들로의 분할을 포함하고, 각각의 시간 슬롯은 주파수 서브대역들로 분할되고, 상기 주파수 대역들은 동일하게 이격된, 상기 오디오 신호의 시간-주파수 타일 표현을 수신하는 단계; 및
상기 오디오 신호의 동적 범위를 감소시키기 위해 상기 오디오 신호의 상기 시간-주파수 타일 표현을 압축하는 단계를 포함하고;
상기 오디오 신호의 상기 시간-주파수 타일 표현을 압축하는 단계는:
그룹핑 정보에 기초하여 상기 오디오 신호의 채널들을 채널들의 별개의 서브세트들로 분할하는 단계; 및
채널들의 각각의 별개의 서브세트에 대해:
상기 오디오 신호의 상기 시간-주파수 타일 표현의 시간 슬롯에 대해 공유된 이득을 산출하는 단계와,
상기 시간 슬롯에 대한 상기 공유된 이득을 채널들의 별개의 서브세트의 각각의 채널의 각각의 주파수 서브대역에 적용하는 단계를 포함하는, 다수의 채널들을 포함하는 오디오 신호를 압축하는 방법. - 다수의 채널들을 포함하는 오디오 신호를 압축하기 위한 장치에 있어서:
상기 오디오 신호의 시간-주파수 타일 표현을 수신하는 제 1 인터페이스로서, 상기 오디오 신호의 상기 시간-주파수 타일 표현은 상기 오디오 신호의 시간 슬롯들로의 분할을 포함하고, 각각의 시간 슬롯은 주파수 서브대역들로 분할되고, 상기 주파수 서브대역들은 동일하게 이격된, 상기 제 1 인터페이스; 및
상기 오디오 신호의 동적 범위를 감소시키기 위해 상기 오디오 신호의 상기 시간-주파수 타일 표현을 압축하는 압축기를 포함하고;
상기 오디오 신호의 상기 시간-주파수 타일 표현을 압축하는 것은:
그룹핑 정보에 기초하여 상기 오디오 신호의 채널들을 채널들의 별개의 서브세트들로 분할하는 것;
채널들의 각각의 별개의 서브세트에 대해:
상기 오디오 신호의 상기 시간-주파수 타일 표현의 시간 슬롯에 대해 공유된 이득을 산출하는 것과;
상기 시간 슬롯에 대한 상기 공유된 이득을 채널들의 별개의 서브세트의 각각의 채널의 각각의 주파수 서브대역에 적용하는 것을 포함하는, 다수의 채널들을 포함하는 오디오 신호를 압축하기 위한 장치. - 하나 이상의 프로세서들에 의해 실행될 때, 제 1 항의 방법을 수행하는 지시들을 포함하는 비-일시적 컴퓨터 판독가능한 매체.
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| KR1020217012568A KR102509345B1 (ko) | 2013-04-05 | 2014-04-01 | 향상된 스펙트럼 확장을 사용하여 양자화 잡음을 감소시키기 위한 압신 장치 및 방법 |
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| US201361877167P | 2013-09-12 | 2013-09-12 | |
| US61/877,167 | 2013-09-12 | ||
| PCT/US2014/032578 WO2014165543A1 (en) | 2013-04-05 | 2014-04-01 | Companding apparatus and method to reduce quantization noise using advanced spectral extension |
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| KR1020257006533A Pending KR20250036940A (ko) | 2013-04-05 | 2014-04-01 | 향상된 스펙트럼 확장을 사용하여 양자화 잡음을 감소시키기 위한 압신 장치 및 방법 |
| KR1020167015589A Active KR102081043B1 (ko) | 2013-04-05 | 2014-04-01 | 향상된 스펙트럼 확장을 사용하여 양자화 잡음을 감소시키기 위한 압신 장치 및 방법 |
| KR1020167015588A Active KR102088153B1 (ko) | 2013-04-05 | 2014-04-01 | 향상된 스펙트럼 확장을 사용하여 양자화 잡음을 감소시키기 위한 압신 장치 및 방법 |
| KR1020217012568A Active KR102509345B1 (ko) | 2013-04-05 | 2014-04-01 | 향상된 스펙트럼 확장을 사용하여 양자화 잡음을 감소시키기 위한 압신 장치 및 방법 |
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| KR1020217012568A Active KR102509345B1 (ko) | 2013-04-05 | 2014-04-01 | 향상된 스펙트럼 확장을 사용하여 양자화 잡음을 감소시키기 위한 압신 장치 및 방법 |
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