公开(公告)号：WO2011122875A3

公开(公告)日：2011-12-22

申请号：PCT/KR2011002227

申请日：2011-03-31

Applicant: KOREA ELECTRONICS TELECOMM ,  SUNG JONGMO ,  KIM HYUN WOO ,  BAE HYUN JOO

Inventor： SUNG JONGMO ,  KIM HYUN WOO ,  BAE HYUN JOO

IPC: G10L19/005 ,  G10L19/02 ,  G10L19/032

CPC classification number: G10L19/0212 ,  G10L19/0017 ,  G10L19/032 ,  G10L19/24

Abstract: Disclosed is an encoding method of an encoder. The encoder generates a first MDCT coefficient by converting an input signal, and generates an MDCT index by quantizing the first MDCT coefficient. The encoder generates a second MDCT coefficient by inversely quantizing the MDCT index, and calculates an MDCT error coefficient by a difference between the first MDCT coefficient and the second MDCT coefficient. Next, said encoder generates an error index by encoding the MDCT error coefficient, and generates a gain index corresponding to a gain of the first MDCT coefficient from the first MDCT coefficient and the second MDCT coefficient.

Abstract translation: 公开了一种编码器的编码方法。 编码器通过转换输入信号来生成第一MDCT系数，并且通过量化第一MDCT系数来生成MDCT索引。 编码器通过对MDCT索引进行逆量化来生成第二MDCT系数，并且通过第一MDCT系数与第二MDCT系数之间的差来计算MDCT误差系数。 接着，所述编码器通过对MDCT误差系数进行编码来生成误差指标，并且根据第一MDCT系数和第二MDCT系数生成与第一MDCT系数的增益对应的增益指标。

公开(公告)号：EP2555186A4

公开(公告)日：2014-04-16

申请号：EP11763047

申请日：2011-03-31

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： SUNG JONGMO ,  KIM HYUN WOO ,  BAE HYUN JOO

IPC: G10L19/005 ,  G10L19/24 ,  G10L19/00 ,  G10L19/02 ,  G10L19/032

CPC classification number: G10L19/0212 ,  G10L19/0017 ,  G10L19/032 ,  G10L19/24

Abstract: An encoding method of an encoder is provided. The encoder generates first MDCT coefficients by transforming an input signal, and generates MDCT indices by quantizing the first MDCT coefficients. The encoder generates second MDCT coefficients by dequantizing the MDCT indices, and calculates MDCT residual coefficients using differences between the first MDCT coefficients and the second MDCT coefficients. The encoder generates a residual index by encoding the MDCT residual coefficients, and generates gain indices corresponding to gains from the first MDCT coefficients and the second MDCT coefficients.

公开(公告)号：KR20100124678A

公开(公告)日：2010-11-29

申请号：KR20100046928

申请日：2010-05-19

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LEE MI SUK ,  YANG HEE SIK ,  KIM HYUN WOO ,  SUNG JONG MO ,  BAE HYUN JOO ,  LEE BYUNG SUN

IPC: G10L19/00 ,  G10L19/02 ,  G10L19/24 ,  G11B20/10 ,  H04N7/24

CPC classification number: G10L19/02 ,  G10L19/0212 ,  G10L19/24

Abstract: PURPOSE: A method and an apparatus for encoding and decoding an audio signal by using layered sinusoidal pulse coding are provided to improve the quality of a synthesized signal in consideration of sine wave pulse coding for a lower layer when encoding and decoding an audio signal in an upper layer. CONSTITUTION: A method for encoding an audio signal according comprises: receiving a converted audio signal; dividing the converted audio signal into a plurality of sub-bands(1004); performing a 1st sinusoidal pulse coding on the plurality of sub-bands; determining a block where a 2nd sinusoidal pulse coding is to be performed, out of the plurality sub-bands; and performing the 2nd sinusoidal pulse coding on the corresponding block(1008-1010), wherein a 1st sinusoidal pulse coding step is variably performed depending on the pulse coding information.

Abstract translation: 目的：提供一种通过使用分层正弦脉冲编码来对音频信号进行编码和解码的方法和装置，以便在编码和解码音频信号的编码和解码时考虑到下层的正弦波脉冲编码来提高合成信号的质量 上层。 构成：一种用于对音频信号进行编码的方法，包括：接收转换的音频信号; 将转换后的音频信号划分成多个子带（1004）; 对所述多个子带执行第一正弦脉冲编码; 确定要在多个子带中执行第二正弦脉冲编码的块; 以及对相应块（1008-1010）执行第二正弦脉冲编码，其中根据脉冲编码信息可变地执行第一正弦脉冲编码步骤。