公开(公告)号：EP3109611A1

公开(公告)日：2016-12-28

申请号：EP15749031.9

申请日：2015-02-17

申请人： Samsung Electronics Co., Ltd.

发明人： SUNG, Ho-sang ,  OSIPOV, Konstantin ,  LU, Yi

IPC分类号： G01L19/02

CPC分类号： G10L19/0212 ,  G10L19/002 ,  G10L19/24

摘要： The present invention relates to a method and an apparatus for encoding and decoding spectrum coefficients in the frequency domain. The spectrum encoding method may comprise the steps of: selecting an encoding type on the basis of bit allocation information of respective bands; performing zero encoding with respect to a zero band; and encoding information of selected significant frequency components with respect to respective non-zero bands. The spectrum encoding method enables encoding and decoding of spectrum coefficients which is adaptive to various bit-rates and various sub-band sizes. In addition, a spectrum can be encoded using a TCQ method at a fixed bit rate using a bit-rate control module in a codec that supports multiple rates. Encoding performance of the codec can be maximised by encoding high performance TCQ at a precise target bit rate.

摘要翻译： 本发明涉及用于对频域中的频谱系数进行编码和解码的方法和装置。 频谱编码方法可以包括以下步骤：基于各个频带的比特分配信息来选择编码类型; 对零带执行零编码; 以及针对相应的非零频带编码所选择的有效频率分量的信息。 频谱编码方法能够对各种比特率和各种子带尺寸自适应的频谱系数进行编码和解码。 此外，可以使用TCQ方法以固定比特率使用支持多个速率的编解码器中的比特率控制模块对频谱进行编码。 可以通过以精确的目标比特率编码高性能TCQ来最大化编解码器的编码性能。

公开(公告)号：EP2717264B1

公开(公告)日：2020-01-01

申请号：EP12791983.5

申请日：2012-06-01

申请人： Samsung Electronics Co., Ltd.

发明人： POROV,Anton ,  OSIPOV, Konstantin ,  CHOO, Ki-hyun

IPC分类号： G10L19/02 ,  G10L19/00

公开(公告)号：EP1905007A1

公开(公告)日：2008-04-02

申请号：EP06823588.6

申请日：2006-07-14

申请人： Samsung Electronics Co., Ltd.

发明人： KIM, Jung-Hoe ,  OH, Eun-Mi ,  OSIPOV, Konstantin ,  KUDRYASHOV, Boris

IPC分类号： G10L19/00

CPC分类号： G10L19/035 ,  G10L19/0017 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/0212

摘要： An method and apparatus to extract an audio signal having an important spectral component (ISC) and a low bit-rate audio signal coding/decoding method using the method and apparatus to extract the ISC. The method of extracting the ISC includes calculating perceptual importance including an SMR (signal-to-mark ratio) value of transformed spectral audio signals by using a psychoacoustic model, selecting spectral signals having a masking threshold value smaller than that of the spectral audio signals using the SMR value as first ISCs, and extracting a spectral peak from the audio signals selected as the ISCs according to a predetermined weighting factor to select second ISCs. Accordingly, the perceptual important spectral components can be efficiently coded so as to obtain high sound quality at a low bit-rate. In addition, it is possible to extract the perceptual important spectral component by using the psychoacoustic model, to perform coding without phase information, and to efficiently represent a spectral signal at a low bit-rate. In addition, the methods and apparatus can be employed in all the applications requiring a low bit-rate audio coding scheme and in a next generation audio scheme.

公开(公告)号：EP2717264A2

公开(公告)日：2014-04-09

申请号：EP12791983.5

申请日：2012-06-01

申请人： Samsung Electronics Co., Ltd.

发明人： POROV,Anton ,  OSIPOV, Konstantin ,  CHOO, Ki-hyun

IPC分类号： G10L19/02

摘要： Provided is an audio encoding method. The audio encoding method includes: acquiring envelopes based on a predetermined sub-band for an audio spectrum; quantizing the envelopes based on the predetermined sub-band; and obtaining a difference value between quantized envelopes for adjacent sub-bands and lossless encoding a difference value of a current sub-band by using a difference value of a previous sub-band as a context. Accordingly, the number of bits required to encode envelope information of an audio spectrum may be reduced in a limited bit range, thereby increasing the number of bits required to encode an actual spectral component.

摘要翻译： 本发明提供一种音频编码方法。 音频编码方法包括：获取基于预定子带在音频频谱包络线; 量化基于预定的子带的包络线; 和获得用于相邻子频带和无损通过使用先前子频带的差值作为上下文编码当前子频带的差值量化的包络之间的差值。 因此，编码音频频谱的包络信息所需要的比特的数目可以在有限位范围被减小，从而增加了实际的频谱分量进行编码所需的比特的数量。

公开(公告)号：EP1905005A1

公开(公告)日：2008-04-02

申请号：EP06769032.1

申请日：2006-06-26

申请人： Samsung Electronics Co., Ltd.

发明人： KIM, Jung-Hoe ,  OH, Eun-Mi, 223-502 Sibeom-danji Woosung Apt. ,  KUDRYASHOV, Boris ,  OSIPOV, Konstantin

IPC分类号： G10L19/00

CPC分类号： G10L19/02 ,  G10L19/0017 ,  G10L19/06

摘要： A method and apparatus to encode/decode a low bit-rate audio signal. The method of encoding a low bit-rate audio signal, includes quantizing and losslessly-encoding a specific frequency component of an audio signal in a frequency domain, generating codebooks using the audio signal in the frequency domain, detecting an envelope of a frequency component of the audio signal other than the specific frequency component in a specific band unit and quantizing and losslessly-encoding the detected envelope of the other frequency component, selecting a codebook that is most similar to the other frequency component of the audio signal to be encoded from among the generated codebooks and determining a codebook index (fine structure), losslessly-encoding the determined codebook index, and generating a bit stream using the specific frequency component, the envelope of the other frequency component, and the determined codebook index. The method of decoding a low bit-rate audio signal, includes restoring and dividing a bit stream into a specific frequency component and a frequency component other than the specific frequency component, losslessly-decoding and inversely quantizing the specific frequency component, restoring codebook index information and envelope information about the other frequency component, generating codebooks using the specific frequency component which is inversely quantized, and restoring the other frequency component using the restored codebook index information and the restored envelope information about the other frequency component.