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A 3D Audio Core-Codec Employing an Improved Buffer Control Method

향상된 버퍼 제어 방법을 사용한 3D 오디오 핵심 부호화기

  • 김인철 (서울시립대학교 전자전기컴퓨터공학부)
  • Received : 2019.12.20
  • Accepted : 2020.01.31
  • Published : 2020.03.30

Abstract

In this paper, a new buffer control method is proposed for improving the performance of the frequency domain part of the 3D audio (3DA) core codec. For the proposed buffer control method, we first combine the 3DA RM9 with the 3GPP AAC buffer control method which includes the psychoacoustic model and rate-distortion control process with the spectral hole avoidance algorithm. Then, we revise the 3GPP buffer control method so as to achieve a faithful bit allocation to the frames with higher activity. With the MUSHRA test, we prove that the proposed buffer control method demonstrates better performance than the 3DA RM9 and 3GPP AAC.

본 논문에서는 3DA 핵심 부호화기의 FD 처리부의 성능 향상을 위해 새로운 버퍼 제어 기법을 제안하였다. 제안한 버퍼 제어 기법은 3GPP의 심리음향 모델과 스펙트럼 공백 회피 기법을 포함한 율-왜곡 제어부를 채택하였다. 그런 다음, 활동성이 높은 프레임에 충실한 비트 할당이 이루어질 수 있도록 3GPP 버퍼 제어 방법을 수정하였다. 본 논문에서 제안한 버퍼 제어 방법의 성능은 MUSHRA 테스트를 통해 평가되었고, 그 결과 3DA RM9 및 3GPP AAC의 버퍼 제어 방법보다 우수한 성능을 보임을 입증한다.

Keywords

References

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