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1. 发明申请

WO2003003600A1 NARROWBAND SPEECH SIGNAL TRANSMISSION SYSTEM WITH PERCEPTUAL LOW-FREQUENCY ENHANCEMENT 审中-公开
标题翻译：具有低频增益的窄带语音信号传输系统
公开(公告)号：WO2003003600A1
公开(公告)日：2003-01-09
申请号：PCT/IB2002/002367
申请日：2002-06-20
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , SLUIJTER, Robert, J. , LARSEN, Erik , GERRITS, Andreas, J. , AARTS, Ronaldus, M.
发明人： SLUIJTER, Robert, J. , LARSEN, Erik , GERRITS, Andreas, J. , AARTS, Ronaldus, M.
IPC分类号： H04B1/66
CPC分类号： G10L21/038 , H04B1/665 , H04B1/667
摘要： Described is a transmission system (20) comprising a transmitter (22) for transmitting a NARROWBAND speech signal, e.g. bandwidth limited between 300 and 3400 Hz, to a receiver (24) via a transmission channel (26). The transmission system (20) is characterized in that the transmitter (22) or the receiver (24) comprise amplifying means (28,30,32,34,36,38) for enhancing a listener's perception of low-frequency speech signal components by amplifying a frequency band of the NARROWBAND speech signal. The frequency band may contain frequencies in the range of 300-450 Hz. The amplifying means (28,30,32,34,36,38) may comprise a band pass filter (28,34) for deriving the frequency band from the NARROWBAND speech signal and an amplifier (30,36) for amplifying the frequency band. The amplification of the frequency band gives a reinforced perception of frequency components below the NARROWBAND speech signal (e.g. 50-300 Hz), compensating for the lack of the physical presence of these components.
摘要翻译：描述了一种传输系统（20），包括用于发送NARROWBAND语音信号的发射机（22）带宽限制在300和3400Hz之间，经由传输信道（26）传送到接收器（24）。传输系统（20）的特征在于发射机（22）或接收机（24）包括放大装置（28,30,32,34,36,38），用于增强听众对低频语音信号分量的感知放大NARROWBAND语音信号的频带。该频带可以包含在300-450Hz范围内的频率。放大装置（28,30,32,34,36,38）可以包括用于从NARROWBAND语音信号导出频带的带通滤波器（28,34）和用于放大频带的放大器（30,36）。频带的放大给出了低于NARROWBAND语音信号（例如50-300Hz）的频率分量的增强感知，补偿了这些组件的物理存在的缺乏。

2. 发明申请

WO2003003345A1 信号の周波数成分を補間するための装置および方法审中-公开
标题翻译：用于插入信号频率分量的装置和方法
公开(公告)号：WO2003003345A1
公开(公告)日：2003-01-09
申请号：PCT/JP2001/005620
申请日：2001-06-29
申请人：株式会社ケンウッド , 佐藤寧
发明人：佐藤　寧
IPC分类号： G10L13/00
CPC分类号： G10L21/038 , G10L19/0204 , G10L19/097 , H04B1/667
摘要： A frequency interpolating device for reproducing a signal similar to the original one by restoring the frequency component, which is suppressed in a specific frequency band of the original signal, approximately from the input signal having the suppressed frequency component. In the frequency interpolating device, the input signal is divided (60) into a plurality of component signals each having a frequency component in each frequency band, and the divided component signals are used to synthesize (80) a component signal having the frequency components of the suppressed bands and are added to the input signal. In this device, the divided component signals are individually frequency−converted (X, 70) into signals of the same frequency band to synthesize (Fig. 6) a component signal having the suppressed frequency band components as a linear combination of the frequency−converted component signals. Moreover, the level of the component signals to be combined is determined (110, 130) on the basis of the spectrum envelope information of the frequency components left unsuppressed in the input signal.
摘要翻译：一种频率内插装置，用于通过从具有抑制的频率分量的输入信号中恢复在原始信号的特定频带中被抑制的频率分量来再现类似于原始信号的信号。在频率插入装置中，将输入信号（60）分割为各频带成分的多个分量信号，分频分量信号用于合成（80）具有频率分量的分量信号被抑制的频带并被添加到输入信号。在该装置中，分频分量信号被单独频率转换（X，70）成相同频带的信号，以将具有抑制的频带分量的分量信号合成（图6）作为频率转换的线性组合分量信号。此外，基于在输入信号中未被压缩的频率分量的频谱包络信息，确定要组合的分量信号的电平（110,130）（110,130）。

3. 发明申请

WO02052732A1 ENCODER AND DECODER 审中-公开
标题翻译：编码器和解码器
公开(公告)号：WO02052732A1
公开(公告)日：2002-07-04
申请号：PCT/JP2001/011254
申请日：2001-12-21
IPC分类号： G10L19/02 , H04B1/66 , H03M7/30
CPC分类号： H04B1/667 , G10L19/0208
摘要： An encoder in which the number of bits of a code is saved. At step S11, the difference between a normalization coefficient Bi to be coded and a normalization Bi-1 of an encoding unit Ai-1 of a band adjacent, on the lower band side, to that of an encoding unit Ai corresponding to the normalization coefficient Bi is calcualted. At step S12, a table showing the correspondance between a difference of higher frequency and the code of a smaller number of bits is referred to, and the code corresponding to the calculated difference is read out. At step S13, it is judged whether or not all the normolization coefficients B are encoded. If so, the procedure goes to Step S14 and the code read at step S12 is outputted. The invention can be applied to a sound recorder.
摘要翻译：编码器，其中保存代码的位数。在步骤S11中，要编码的归一化系数Bi与在低频侧相邻的频带的编码单元Ai-1与归一化系数相对应的编码单元Ai的编码单位Ai-1的标准化Bi-1之间的差 Bi被计算。在步骤S12中，参考表示较高频率的差与较小位数的码之间的对应关系的表，并且读出与计算的差相对应的码。在步骤S13，判断所有的正常化系数B是否被编码。如果是，则进入步骤S14，输出在步骤S12读出的代码。本发明可应用于录音机。

4. 发明申请

WO02033692A1 PERCEPTUALLY IMPROVED ENCODING OF ACOUSTIC SIGNALS 审中-公开
标题翻译：明显改善了声音信号的编码
公开(公告)号：WO02033692A1
公开(公告)日：2002-04-25
申请号：PCT/SE2001/001919
申请日：2001-09-07
IPC分类号： G10L19/005 , G10L19/02 , G10L21/02 , H03M7/30 , H04B1/66
CPC分类号： H04B1/667 , G10L19/0208 , G10L21/0364
摘要： The present invention relates to encoding of an acoustic source signal (x) such that a corresponding signal (z) reconstructed on basis of the encoded information has a perceptually high sound quality. The acoustic source signal (x) is encoded into at least one basic coded signal (P) by a coding arrangement in a transmitter (300). The at least one basic coded signal (P) thus represents perceptually significant characteristics of the acoustic signal (x). The coding arrangement in the transmitter (300) may include at least one spectral smoothing unit (305a), which receives at least one of the signal components on which the basic coded signal P is based and generates in response thereto a corresponding smoothed signal component. At least one enhanced coded signal P(E) is then produced from i.a. the corresponding smoothed signal component.
摘要翻译：本发明涉及声源信号（x）的编码，使得基于编码信息重建的对应信号（z）具有感知上的高音质。通过发射机（300）中的编码装置将声源信号（x）编码为至少一个基本编码信号（P）。所述至少一个基本编码信号（P）因此表示声信号（x）的感知显着特性。发射机（300）中的编码装置可以包括至少一个频谱平滑单元（305a），其接收基本编码信号P所基于的信号分量中的至少一个，并响应于其产生对应的平滑信号分量。然后从i.a.产生至少一个增强编码信号P（E）。对应的平滑信号分量。

5. 发明申请

WO01009889A1 SYSTEM AND METHOD FOR MARKING OF AUDIO DATA 审中-公开
标题翻译：用于标记音频数据的系统和方法
公开(公告)号：WO01009889A1
公开(公告)日：2001-02-08
申请号：PCT/IB2000/001138
申请日：2000-07-24
IPC分类号： G10L19/018 , G11B20/00 , G11B20/10 , H04B1/66 , H04S1/00 , H04H1/00
CPC分类号： G11B20/00891 , G10L19/018 , G11B20/00086 , G11B20/10527 , H04B1/667
摘要： Audio data is marked in a manner that is inaudible to the human auditory system by indexing into spectral representations of the data. The indexing identifies spectral components whose magnitudes are redistributed in a manner that binarily encodes or otherwise inserts marking information into the audio information.
摘要翻译：通过将数据索引到数据的频谱表示中，音频数据以对人类听觉系统听不到的方式进行标记。索引识别其大小被重新分布的频谱分量，其方式是将标记信息二进制编码或插入到音频信息中。

6. 发明申请

WO1998015945A1 VARIABLE LENGTH AUDIO CODING USING A PLURALITY OF SUBBAND BIT ALLOCATION PATTERNS 审中-公开
标题翻译：可变长度音频编码使用多个分配位分配模式
公开(公告)号：WO1998015945A1
公开(公告)日：1998-04-16
申请号：PCT/US1997017770
申请日：1997-10-06
申请人： PICTURETEL CORPORATION
发明人： PICTURETEL CORPORATION , HELF, Brant
IPC分类号： G10L03/02
CPC分类号： H04B1/667
摘要： Transform coefficients of audio signal samples are grouped into subbands. A predetermined number of subband bit allocation patterns (encoding categorizations), specifying parameters including quantization step size, dead zone, maximum bits, vector dimension, and a variable length code for each vector, are available. Subband bits are assigned in accordance with the quantized power distribution over the subbands, and the bit allocation patterns selectively chosen in accordance with a fidelity criterion and a maximum bit rate. The quantized power, transform coefficients and the selected bit allocation pattern (encoding categorization) identity are transmitted to a decoder, where, using the known encoding categorization, the coded data are inverse-transformed and dequantized into a reconstructed audio signal.
摘要翻译：音频信号样本的变换系数被分组成子带。可以使用预定数量的子带位分配模式（编码分类），指定包括量化步长，死区，最大位，向量维数以及每个向量的可变长度码的参数。根据子频带上的量化功率分配分配子带位，并且根据保真度标准和最大比特率有选择地选择比特分配模式。将量化的功率，变换系数和选择的位分配模式（编码分类）标识发送到解码器，其中，使用已知的编码分类，编码数据被逆变换和去量化为重构的音频信号。

7. 发明申请

WO1997038493A1 ENCODING OF A PLURALITY OF INFORMATION SIGNALS 审中-公开
标题翻译：编码大量信息信号
公开(公告)号：WO1997038493A1
公开(公告)日：1997-10-16
申请号：PCT/IB1997000325
申请日：1997-04-01
申请人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB
发明人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB , TEN KATE, Warner, Rudolph, Theophile
IPC分类号： H03M07/30
CPC分类号： H04H20/88 , G11B20/00007 , G11B20/00992 , G11B2020/10592 , H04B1/667 , H04S3/02
摘要： An apparatus for encoding a plurality of digital information signals is disclosed, having at least a first input means (1) for receiving a first digital information signal (L) and a second input means (2) for receiving a second digital information signal (R). Further, signal combination means (10) are present for combining the first and second digital information signal (L, R) and for generating a first combination signal (M). First and second data compression means (12.1, 12.2) are present for data compressing the first and second digital information signal (L, R) so as to obtain first and second data reduced digital information signals and first, second and third masked threshold determining means (14.1, 14.2, 14.3) are present for determining first, second and third masked thresholds respectively from the first, second digital information signals and the combination signal respectively. The apparatus further comprises selection means (16.1) for deriving one masked threshold from the first and third masked threshold so as to obtain a first selected masked threshold. Preferably, said first selected masked threshold is the smallest of the first and third masked thresholds. The first data compression means is adapted to carry out a data compression step on the first digital information signal in response to said first selected masked threshold.
摘要翻译：公开了一种用于对多个数字信息信号进行编码的装置，至少具有用于接收第一数字信息信号（L）的第一输入装置（1）和用于接收第二数字信息信号（R ）。此外，信号组合装置（10）用于组合第一和第二数字信息信号（L，R）并用于产生第一组合信号（M）。存在用于数据压缩第一和第二数字信息信号（L，R）的第一和第二数据压缩装置（12.1,12.2），以便获得第一和第二数据缩减数字信息信号;以及第一，第二和第三屏蔽阈值确定装置（14.1,14.2,14.3）分别用于从第一，第二数字信息信号和组合信号分别确定第一，第二和第三屏蔽阈值。该装置还包括从第一和第三屏蔽阈值导出一个被屏蔽阈值的选择装置（16.1），以便获得第一选择的掩蔽阈值。优选地，所述第一选择的掩蔽阈值是第一和第三屏蔽阈值中的最小值。第一数据压缩装置适于响应于所述第一选择的掩蔽阈值对第一数字信息信号执行数据压缩步骤。

8. 发明申请

WO1997029549A1 WIDE BAND AUDIO SIGNAL ENCODER, WIDE BAND AUDIO SIGNAL DECODER, WIDE BAND AUDIO SIGNAL ENCODER/DECODER AND WIDE BAND AUDIO SIGNAL RECORDING MEDIUM 审中-公开
标题翻译：宽带音频信号编码器，宽带音频信号解码器，宽带音频信号编码器/解码器和宽带音频信号记录介质
公开(公告)号：WO1997029549A1
公开(公告)日：1997-08-14
申请号：PCT/JP1997000301
申请日：1997-02-07
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. , EJIMA, Naoki
发明人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
IPC分类号： H03M07/30
CPC分类号： G11B20/00007 , H04B1/667
摘要： A wide band audio signal encoder, a wide band audio signal decoder, a wide band audio signal encoder/decoder and a wide band audio signal recording medium which have wide band widths, low distortion factors and high dynamic ranges with low bit rates. Wide band audio data are divided into signal data of N (natural number) subbands. The numbers of bits for quantization and for subsampling are determined in accordance with the noise floor information of the wide band audio data. The signal data of the N subbands are subsampled with the respective numbers of bits. Encoded data which are obtained by multiplexing the subsampled signal data of the N subbands are recorded on a wide band audio signal recording medium. Therefore, both the substantially higher dynamic range and the substantially wider band width in comparison with the conventional techniques can be realized. With this constitution, natural recording and reproduction which is extremely transparent and able to reproduce over an extra-high range can be realized and the recording medium on which the audiodata are recorded and a reproduced sound field can be realized.
摘要翻译：宽带音频信号编码器，宽带音频信号解码器，宽带音频信号编码器/解码器和宽带音频信号记录介质，具有宽带宽，低失真因数和低比特率的高动态范围。宽带音频数据被划分为N（自然数）子带的信号数据。根据宽带音频数据的噪声基底信息来确定用于量化和子采样的比特数。 N个子带的信号数据用相应的位数进行二次采样。通过复用N个子带的子采样信号数据而获得的编码数据被记录在宽带音频信号记录介质上。因此，可以实现与传统技术相比，显着更高的动态范围和更宽的带宽。利用这种结构，可以实现非常透明并且能够在超高范围内再现的自然记录和再现，并且可以实现其上记录有audiodata的记录介质和再现的声场。

9. 发明申请

WO1997015984A1 REPEATED DECODING AND ENCODING IN SUBBAND ENCODER/DECODERS 审中-公开
标题翻译：在SUBBAND编码器/解码器中重复解码和编码
公开(公告)号：WO1997015984A1
公开(公告)日：1997-05-01
申请号：PCT/IB1996001118
申请日：1996-10-18
申请人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB
发明人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB , TEN KATE, Warner, Rudolph, Theophile
IPC分类号： H04B01/66
CPC分类号： H04B1/667 , G06T9/007
摘要： An encoding apparatus is provided for encoding a wideband digital signal, comprising an input (1) for receiving the wideband digital signal, a splitter unit (3) for splitting the wideband digital signal into a number of M sub-signals and a formatting unit (7) for assembling digital information including said data reduced sub-signals into a digital output signal having a format suitable for transmission or storage. During a repeated encoding and decoding of a wideband digital signal in a subband encoding/decoding system or a transform encoding/decoding system, signal degradation may occur. In order to avoid this, the apparatus further comprises a variable delay unit (20) coupled between the input (1) and the splitter unit (3), for realizing a delay, the length of which is controlled by a control signal, and a control signal generator unit (24) for generating said control signal.
摘要翻译：提供一种用于对宽带数字信号进行编码的编码装置，包括用于接收宽带数字信号的输入端（1），用于将宽带数字信号分解为多个M个子信号的分离器单元（3）和格式化单元 7）用于将包括所述数据简化的子信号的数字信息组装成具有适于传输或存储的格式的数字输出信号。在子带编码/解码系统或变换编码/解码系统中对宽带数字信号的重复编码和解码期间，可能发生信号劣化。为了避免这种情况，该装置还包括耦合在输入（1）和分离器单元（3）之间的可变延迟单元（20），用于实现其长度由控制信号控制的延迟，以及控制信号发生器单元（24），用于产生所述控制信号。

10. 发明申请

WO1995034956A1 METHOD AND DEVICE FOR ENCODING SIGNAL, METHOD AND DEVICE FOR DECODING SIGNAL, RECORDING MEDIUM, AND SIGNAL TRANSMITTING DEVICE 审中-公开
标题翻译：用于编码信号的方法和设备，用于解码信号的方法和设备，记录介质和信号传输设备
公开(公告)号：WO1995034956A1
公开(公告)日：1995-12-21
申请号：PCT/JP1995001172
申请日：1995-06-12
申请人： SONY CORPORATION , OIKAWA, Yoshiaki , TSUTSUI, Kyoya , MIYAMORI, Shinji , UENO, Masatoshi
发明人： SONY CORPORATION
IPC分类号： H03M07/30
CPC分类号： H04H20/88 , G10L19/012 , G10L19/18 , G11B20/10 , G11B20/24 , G11B2020/10592 , H04B1/665 , H04B1/667
摘要： In a method and device for signal encoding according to this invention, a first encoder (124) separately encodes noise components of a plurality of channels and a second encoder (125) commonly encodes noise components of a plurality of channels. Then a discriminating means (123) detects the characteristics of the noise components and selects the output from either of the encoders (124 and 125) based on the discriminated results. When the noise components are commonly encoded, therefore, the compression ratio of the noise components of a plurality of channels can be increased. When the components are not commonly encoded, on the other hand, undesired effects of common encoding can be prevented.
摘要翻译：在根据本发明的用于信号编码的方法和装置中，第一编码器（124）分别编码多个信道的噪声分量，而第二编码器（125）共同编码多个信道的噪声分量。然后，鉴别装置（123）基于鉴别结果检测噪声分量的特性并从编码器（124和125）中选择输出。因此，当噪声分量被共同编码时，可以增加多个通道的噪声分量的压缩比。另一方面，当组件不被共同编码时，可以防止普通编码的不期望的影响。

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