公开(公告)号：US09111533B2

公开(公告)日：2015-08-18

申请号：US13297536

申请日：2011-11-16

Applicant: Miyuki Shirakawa ,  Yohei Kishi ,  Masanao Suzuki ,  Yoshiteru Tsuchinaga

Inventor： Miyuki Shirakawa ,  Yohei Kishi ,  Masanao Suzuki ,  Yoshiteru Tsuchinaga

IPC: G10L19/02 ,  G10L19/035 ,  G10L19/00 ,  G10L19/008

CPC classification number: G10L19/035 ,  G10L19/0017 ,  G10L19/008 ,  G10L19/0204

Abstract: An audio coding device includes a time-to-frequency converter that performs time-to-frequency conversion on each frame of a signal in at least one channel included in an audio signal in a predetermined length of time in order to convert the signal in the at least one channel to a frequency signal; a complexity calculator that calculates complexity of the frequency signal for each of the at least one channel. The audio further includes a bit allocation controller that determines a number of bits to be allocated to each of at least one channel so that more bits are allocated to the each of the at least one channel as the complexity of the each of at least one channel increases, and increases the number of bits to be allocated as an estimation error in the number; and a coder that codes the frequency signal.

Abstract translation: 一种音频编码装置包括一个时间 - 频率转换器，它以预定的时间长度在包括在音频信号中的至少一个信道中的信号的每个帧上进行时间 - 频率转换，以便将信号转换成 至少一个频道到频率信号; 复杂度计算器，其计算所述至少一个信道中的每一个的频率信号的复杂度。 音频还包括位分配控制器，其确定要被分配给至少一个信道中的每一个的比特数，使得更多的比特被分配给至少一个信道中的每一个，因为至少一个信道中的每一个的复杂度 增加并增加要分配的比特数作为该数量中的估计误差; 以及编码频率信号的编码器。

公开(公告)号：US09031852B2

公开(公告)日：2015-05-12

申请号：US13598826

申请日：2012-08-30

Applicant: Tomokazu Abe

Inventor： Tomokazu Abe

IPC: G10L19/00 ,  G10L19/02 ,  G10L19/035

CPC classification number: G10L19/00 ,  G10L19/02 ,  G10L19/035

Abstract: A data compression/decompression apparatus, for example, acquires sampling data obtained by sampling an audio signal with a predetermined period, and converts the sampling data into frequency domain data. The data compression/decompression apparatus divides a data sequence of the converted frequency domain data into a plurality of blocks such that the number of pieces of data included in each block is variable, and compresses each block.

Abstract translation: 例如，数据压缩/解压缩装置获取通过以预定周期对音频信号进行采样而获得的采样数据，并将采样数据转换成频域数据。 数据压缩/解压缩装置将转换的频域数据的数据序列划分成多个块，使得每个块中包括的数据块数是可变的，并压缩每个块。

公开(公告)号：US08983851B2

公开(公告)日：2015-03-17

申请号：US13004493

申请日：2011-01-11

Applicant: Nikolaus Rettelbach ,  Bernhard Grill ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Markus Multrus ,  Harald Popp ,  Juergen Herre ,  Stefan Wabnik ,  Gerald Schuller ,  Jens Hirschfeld

Inventor： Nikolaus Rettelbach ,  Bernhard Grill ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Markus Multrus ,  Harald Popp ,  Juergen Herre ,  Stefan Wabnik ,  Gerald Schuller ,  Jens Hirschfeld

IPC: G10L19/00 ,  G10L19/032 ,  G10L19/02 ,  G10L19/028 ,  G10L19/035 ,  G10L25/18

CPC classification number: G10L19/035 ,  G10L19/008 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/028 ,  G10L19/032 ,  G10L25/18

Abstract: A noise filler for providing a noise-filled spectral representation of an audio signal on the basis of an input spectral representation of the audio signal has a spectral region identifier configured to identify spectral regions of the input spectral representation spaced from non-zero spectral regions of the input spectral representation by at least one intermediate spectral region, to obtain identified spectral regions, and a noise inserter configured to selectively introduce noise into the identified spectral regions to obtain the noise-filled spectral representation of the audio signal. A noise filling parameter calculator for providing a noise filling parameter on the basis of a quantized spectral representation of an audio signal has a spectral region identifier, as mentioned above, and a noise value calculator configured to selectively consider quantization errors of the identified spectral regions for a calculation of the noise filling parameter. Accordingly, an encoded audio signal representation representing the audio signal can be obtained.

Abstract translation: 用于基于音频信号的输入频谱表示来提供音频信号的噪声填充频谱表示的噪声填充器具有频谱区域标识符，其被配置为识别从非零频谱区域间隔开的输入频谱表示的频谱区域 通过至少一个中间光谱区域的输入光谱表示，以获得所识别的光谱区域，以及噪声插入器，被配置为选择性地将噪声引入所识别的光谱区域中，以获得音频信号的噪声填充的频谱表示。 用于根据音频信号的量化频谱表示提供噪声填充参数的噪声填充参数计算器具有如上所述的频谱区域标识符，以及噪声值计算器，被配置为选择性地考虑所识别的频谱区域的量化误差 噪声填充参数的计算。 因此，可以获得表示音频信号的编码音频信号表示。

公开(公告)号：US08892429B2

公开(公告)日：2014-11-18

申请号：US13583994

申请日：2011-03-08

Applicant: Shiro Suzuki ,  Yuuki Matsumura ,  Yasuhiro Toguri ,  Yuuji Maeda

Inventor： Shiro Suzuki ,  Yuuki Matsumura ,  Yasuhiro Toguri ,  Yuuji Maeda

IPC: G10L19/02 ,  G10L19/035

CPC classification number: G10L19/035 ,  G10L19/0212

Abstract: The present invention relates to an encoding device and an encoding method, a decoding device and a decoding method, and a program that reduce deterioration of sound quality due to encoding of audio signals.An envelope emphasis part (51) emphasizes an envelope (ENV). A noise shaping part (52) divides an emphasized envelope (D) formed by emphasis of the envelope (ENV) by a value larger than 1, and subtracts noise shaping (G) specified by information (NS) from a result of the division. A quantization part (14) sets a result of the subtraction as a quantization bit count (WL), and quantizes a normalized spectrum (S1) formed by normalization of a spectrum (S0) based on the quantization bit count (WL). A multiplexing part (53) multiplexes the information (NS), a quantized spectrum (QS) formed by quantization of the normalized spectrum (S1), and the envelope (ENV). The present invention can be applied to an encoding device encoding audio signals, for example.

Abstract translation: 编码装置和编码方法，解码装置和解码方法技术领域本发明涉及一种减少音频信号编码导致的音质劣化的程序。 信封重点部分（51）强调信封（ENV）。 噪声整形部分（52）将由包络（ENV）的强调形成的强调包络（D）除以大于1的值，并从分割结果中减去由信息（NS）指定的噪声整形（G）。 量化部分（14）将减法的结果设置为量化位计数（WL），并且通过基于量化位计数（WL）对通过频谱归一化形成的归一化频谱（S1）进行量化。 复用部分（53）复用信息（NS），通过归一化频谱（S1）的量化形成的量化频谱（QS）和信封（ENV）。 例如，本发明可以应用于编码音频信号的编码装置。

公开(公告)号：US06978236B1

公开(公告)日：2005-12-20

申请号：US09763128

申请日：2000-01-26

Applicant: Lars Gustaf Liljeryd ,  Kristofer Kjorling ,  Per Ekstrand ,  Fredrik Henn

Inventor： Lars Gustaf Liljeryd ,  Kristofer Kjorling ,  Per Ekstrand ,  Fredrik Henn

IPC: G10L20060101 ,  G10L19/02 ,  G10L19/022 ,  G10L19/035 ,  G10L19/06 ,  G10L21/02 ,  G10L21/038 ,  G10L25/18 ,  G10L19/00

CPC classification number: G10L19/06 ,  G10L19/0208 ,  G10L19/022 ,  G10L19/035 ,  G10L21/038 ,  G10L25/18

Abstract: The present invention provides a new method and an apparatus for spectral envelope encoding. The invention teaches how to perform and signal compactly a time/frequency mapping of the envelope representation, and further, encode the spectral envelope data efficiently using adaptive time/frequency directional coding. The method is applicable to both natural audio coding and speech coding systems and is especially suited for coders using SBR [WO 98/57436] or other high frequency reconstruction methods.

Abstract translation: 本发明提供了一种用于频谱包络编码的新方法和装置。 本发明教导了如何执行和紧凑地发送包络表示的时间/频率映射，并且还使用自适应时间/频率方向编码有效地对频谱包络数据进行编码。 该方法适用于自然音频编码和语音编码系统，并且特别适用于使用SBR [WO 98/57436]或其他高频重建方法的编码器。

公开(公告)号：US5832427A

公开(公告)日：1998-11-03

申请号：US656476

申请日：1996-05-31

Applicant: Yoshitaka Shibuya

Inventor： Yoshitaka Shibuya

IPC: G10L19/02 ,  G10L19/035 ,  H03M7/30 ,  H04B1/66 ,  H04N19/00 ,  H04N19/423 ,  H04N19/426 ,  H04N19/635 ,  H04N19/70 ,  G10L7/02

CPC classification number: H04B1/665

Abstract: In an audio signal processing circuit for carrying out a subband coding used for an audio signal coding, a subband filter (12A) receives 1152 audio samples (SI) of each one frame and divides the samples into 32 frequency bands to sequentially output a vector of first half subband signals (SFA) for a first half of the one frame and a vector of second half subband signals (SFB) for a second half of the one frame. A FFT circuit (111A) carries out an FFT processing for 512 audio samples of each of the first half and the second half of each one frame, to sequentially generate a first half power spectrum (PSA) and a second half power spectrum (PSB). A calculating circuit (113A) calculates a first half SMR vector (SMA) on the basis of the first half subband signals (SFA) and the first half power spectrum (PSA), and then, a second half SMR vector (SMB) on the basis of the second half subband signals (SFB) and the second half power spectrum (PSB). A comparing circuit (115) outputs a larger one of the first half SMR vector (SMA) and the second half SMR vector (SMB), as an SMR vector (SM) for the whole of a corresponding one frame.

Abstract translation: 在用于执行用于音频信号编码的子带编码的音频信号处理电路中，子带滤波器（12A）接收每一帧的1152个音频样本（SI），并将样本划分为32个频带，以顺序地输出 一帧的前半部分的前半个子带信号（SFA）和一帧后半部分的第二半子带信号（SFB）的向量。 FFT电路（111A）对每一帧的前半部分和后半部分中的每一个的512个音频采样执行FFT处理，以顺序生成第一半功率谱（PSA）和第二半功率谱（PSB） 。 计算电路（113A）基于前半个子带信号（SFA）和第一半功率谱（PSA）来计算前半个SMR向量（SMA），然后，在第 第二半子带信号（SFB）和第二半功率谱（PSB）的基础。 比较电路（115）输出第一半SMR矢量（SMA）和第二半SMR矢量（SMB）中较大的一个，作为用于整个相应一帧的SMR矢量（SM）。

公开(公告)号：US12230287B2

公开(公告)日：2025-02-18

申请号：US17768801

申请日：2020-09-04

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Akira Harada ,  Hiroyuki Ehara

IPC: G10L19/035

Abstract: This quantization scale factor determination device is provided with a correction circuit which corrects an initial value of a quantization scale factor on the basis of whether or not an audio signal spectrum is sparse, and a search circuit which searches for a quantization scale factor on the basis of the initial value.

公开(公告)号：US20240420715A1

公开(公告)日：2024-12-19

申请号：US18819804

申请日：2024-08-29

Applicant: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.

Inventor： Nikolaus RETTELBACH ,  Bernhard GRILL ,  Guillaume FUCHS ,  Stefan GEYERSBERGER ,  Markus MULTRUS ,  Harald POPP ,  Juergen HERRE ,  Stefan WABNIK ,  Gerald SCHULLER ,  Jens HIRSCHFELD

IPC: G10L19/035 ,  G10L19/008 ,  G10L19/02 ,  G10L19/028 ,  G10L19/032 ,  G10L25/18

Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error.
A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.

公开(公告)号：US20240420713A1

公开(公告)日：2024-12-19

申请号：US18819680

申请日：2024-08-29

Applicant: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.

Inventor： Nikolaus RETTELBACH ,  Bernhard GRILL ,  Guillaume FUCHS ,  Stefan GEYERSBERGER ,  Markus MULTRUS ,  Harald POPP ,  Juergen HERRE ,  Stefan WABNIK ,  Gerald SCHULLER ,  Jens HIRSCHFELD

IPC: G10L19/035 ,  G10L19/008 ,  G10L19/02 ,  G10L19/028 ,  G10L19/032 ,  G10L25/18

Abstract: An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and information describing the multi-band quantization error.
A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal includes a noise filler for introducing noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.

公开(公告)号：US20240355345A1

公开(公告)日：2024-10-24

申请号：US18633112

申请日：2024-04-11

Applicant: DOLBY INTERNATIONAL AB

Inventor： Lars Villemoes ,  Heiko Purnhagen ,  Per Ekstrand

IPC: G10L19/16 ,  G10L19/035 ,  G10L19/24 ,  G10L21/038

CPC classification number: G10L19/167 ,  G10L19/035 ,  G10L19/24 ,  G10L21/038

Abstract: Embodiments relate to an audio processing unit that includes a buffer, bitstream payload deformatter, and a decoding subsystem. The buffer stores at least one block of an encoded audio bitstream. The block includes a fill element that begins with an identifier followed by fill data. The fill data includes at least one flag identifying whether enhanced spectral band replication (eSBR) processing is to be performed on audio content of the block. A corresponding method for decoding an encoded audio bitstream is also provided.