SIGNAL CLASSIFYING METHOD AND DEVICE AND AUDIO ENCODING METHOD AND DEVICE USING SAME

• Main Authors: CHOO KI HYUN, OSIPOV KONSTANTIN SERGEEVICH, POROV ANTON VIKTOROVICH
• Format: Patent
• Language: English; Korean
• Published: 04.02.2022
• Subjects: ACOUSTICS; MUSICAL INSTRUMENTS; PHYSICS; SPEECH ANALYSIS OR SYNTHESIS; SPEECH OR AUDIO CODING OR DECODING; SPEECH OR VOICE PROCESSING; SPEECH RECOGNITION

신호 분류방법은 현재 프레임을 음성신호과 음악신호 중 하나로 분류하는 단계, 복수개의 프레임으로부터 얻어지는 특징 파라미터에 근거하여 상기 현재 프레임의 분류결과에 에러가 존재하는지 판단하는 단계, 및 상기 판단결과에 대응하여, 상기 현재 프레임의 분류결과를 수정하는 단계를 포함할 수 있다. The present invention relates to an audio encoding and, more particularly, to a signal classifying method and device, and an audio encoding method and device using the same, which can reduce a delay caused by an encoding mode switching while improving the quality of reconstructed sound. The signal classifying method may comprise the operations of: classifying a current frame into one of a speech signal and a music signal; determining, on the basis of a characteristic parameter obtained from multiple frames, whether a result of the classifying of the current frame includes an error; and correcting the result of the classifying of the current frame in accordance with a result of the determination. By correcting an initial classification result of an audio signal on the basis of a correction parameter, the present invention can determine an optimum coding mode for the characteristic of an audio signal and can prevent frequent coding mode switching between frames.