专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20190251979A1 ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, DECODING METHOD, AND NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM 审中-公开
公开(公告)号：US20190251979A1
公开(公告)日：2019-08-15
申请号：US16295387
申请日：2019-03-07
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Srikanth Nagisetty , Zong Xian Liu , Hiroyuki Ehara
IPC分类号： G10L19/02 , G10L19/035 , G10L19/028
CPC分类号： G10L19/0208 , G10L19/028 , G10L19/035 , G10L21/038
摘要： An encoding device according to the disclosure includes a first encoding unit that generates a first encoded signal in which a low-band signal having a frequency lower than or equal to a predetermined frequency from a voice or audio input signal is encoded, and a low-band decoded signal; a second encoding unit that encodes, on the basis of the low-band decoded signal, a high-band signal having a band higher than that of the low-band signal to generate a high-band encoded signal; and a first multiplexing unit that multiplexes the first encoded signal and the high-band encoded signal to generate and output an encoded signal. The second encoding unit calculates an energy ratio between a high-band noise component, which is a noise component of the high-band signal, and a high-band non-tonal component of a high-band decoded signal generated from the low-band decoded signal and outputs the ratio as the high-band encoded signal.

2. 发明申请

US20190158833A1 SIGNAL ENCODING METHOD AND APPARATUS AND SIGNAL DECODING METHOD AND APPARATUS 审中-公开
公开(公告)号：US20190158833A1
公开(公告)日：2019-05-23
申请号：US16259341
申请日：2019-01-28
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： Ho-sang Sung , Ki-hyun Choo , Eun-mi Oh
IPC分类号： H04N19/124 , G10L19/24 , H04N19/196 , G10L19/032 , H03M13/31 , H03M13/15 , H04N19/40 , G10L19/16 , H03M13/05
CPC分类号： H04N19/124 , G10L19/0212 , G10L19/032 , G10L19/035 , G10L19/038 , G10L19/167 , G10L19/24 , H03M13/05 , H03M13/156 , H03M13/31 , H04N19/196 , H04N19/40
摘要： A spectrum coding method includes quantizing spectral data of a current band based on a first quantization scheme, generating a lower bit of the current band using the spectral data and the quantized spectral data, quantizing a sequence of lower bits including the lower bit of the current band based on a second quantization scheme, and generating a bitstream based on a upper bit excluding N bits, where N is 1 or greater, from the quantized spectral data and the quantized sequence of lower bits.

3. 发明申请

US20180211677A1 ADVANCED QUANTIZER 审中-公开
公开(公告)号：US20180211677A1
公开(公告)日：2018-07-26
申请号：US15933108
申请日：2018-03-22
申请人： DOLBY INTERNATIONAL AB
发明人： Janusz KLEJSA , Lars VILLEMOES , Per HEDELIN
IPC分类号： G10L19/035 , G10L19/028 , G10L19/005 , G10L19/20
CPC分类号： G10L19/035 , G10L19/005 , G10L19/028 , G10L19/20
摘要： The present document relates an audio encoding and decoding system (referred to as an audio codec system). In particular, the present document relates to a transform-based audio codec system which is particularly well suited for voice encoding/decoding. A quantization unit configured to quantize a first coefficient of a block of coefficients is described. The block of coefficients comprises a plurality of coefficients for a plurality of corresponding frequency bins. The quantization unit is configured to provide a set of quantizers. The set of quantizers comprises a plurality of different quantizers associated with a plurality of different signal-to-noise ratios, referred to as SNR, respectively. The plurality of different quantizers includes a noise-filling quantizer; one or more dithered quantizers; and one or more un-dithered quantizers. The quantization unit is further configured to determine an SNR indication indicative of a SNR attributed to the first coefficient, and to select a first quantizer from the set of quantizers, based on the SNR indication. In addition, the quantization unit is configured to quantize the first coefficient using the first quantizer.

4. 发明申请

US20180137873A1 GAIN ADJUSTMENT CODING FOR AUDIO ENCODER BY PERIODICITY-BASED AND NON-PERIODICITY-BASED ENCODING METHODS 审中-公开
公开(公告)号：US20180137873A1
公开(公告)日：2018-05-17
申请号：US15868185
申请日：2018-01-11
申请人： Nippon Telegraph and Telephone Corporation
发明人： Takehiro Moriya , Yutaka Kamamoto , Noboru Harada
IPC分类号： G10L19/20 , G10L19/002 , G10L19/032
CPC分类号： G10L19/20 , G10L19/002 , G10L19/02 , G10L19/032 , G10L19/035
摘要： In an encoding method that is expected to produce a smaller code amount out of a periodicity-based encoding method and a non-periodicity-based encoding method, the amount of code or an estimated value of the amount of code of an integer value sequence which is derived from an audio signal is obtained while adjusting gain. In the other encoding method, an integer value sequence obtained in this process is substituted to obtain the amount of code or an estimated value of the amount of code of the integer value sequence. The obtained code amounts or estimated values are compared to choose one of the encoding methods and the integer value sequence is encoded using the chosen encoding method to obtain and output an integer signal code.

5. 发明申请

US20170345434A1 ENCODER AND ENCODING METHOD, DECODER AND DECODING METHOD, AND PROGRAM 审中-公开
公开(公告)号：US20170345434A1
公开(公告)日：2017-11-30
申请号：US15680332
申请日：2017-08-18
申请人： SONY CORPORATION
发明人： Shiro SUZUKI , Yuuki MATSUMURA , Yasuhiro TOGURI , Yuuji MAEDA , Jun MATSUMOTO
IPC分类号： G10L19/035 , G10L19/038 , H04N19/124 , H04N19/48 , H04N19/15 , H03M7/40 , H04N19/91 , G10L19/00
CPC分类号： G10L19/035 , G10L19/0017 , G10L19/038 , H03M7/4037 , H04N19/124 , H04N19/15 , H04N19/48 , H04N19/91
摘要： The present technology relates to an encoder and an encoding method, a decoder and a decoding method, and a program by which encoding efficiency is able to be improved by constraining an appearance probability of a predetermined quantization value of an encoding target to 0 when encoding with a combination of Huffman encoding and multidimensional encoding is performed.

6. 发明申请

US20170316784A1 ENCODING METHOD AND APPARATUS 审中-公开
公开(公告)号：US20170316784A1
公开(公告)日：2017-11-02
申请号：US15650714
申请日：2017-07-14
申请人： HUAWEI TECHNOLOGIES CO.,LTD.
发明人： Zexin Liu , Bin Wang , Lei Miao
IPC分类号： G10L19/002 , G10L19/035 , G10L19/02
CPC分类号： G10L19/002 , G10L19/0204 , G10L19/035
摘要： Present disclosure provide an audio signal encoding method and encoder, which relate to the communications field and can perform proper bit allocation for spectral coefficients of an audio signal. The method includes: splitting spectral coefficients of a current frame into subbands, acquiring quantized energy envelopes of the subbands;adjusting quantized energy envelopes values of some subbands; perform bit allocation according to adjusted quantized energy envelopes of the some subbands; quantizing a spectral coefficient of a subband to which at least one bit is allocated after the bit allocation.

7. 发明授权

US09754594B2 Encoding method and apparatus 有权
公开(公告)号：US09754594B2
公开(公告)日：2017-09-05
申请号：US15170524
申请日：2016-06-01
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Zexin Liu , Bin Wang , Lei Miao
IPC分类号： G10L19/00 , G10L19/002 , G10L19/02 , G10L19/035
CPC分类号： G10L19/002 , G10L19/0204 , G10L19/035
摘要： Present disclosure provide an encoding method and apparatus, which relate to the communications field and can perform proper quantization bit allocation for spectral coefficients of an audio signal, thereby improving quality of a signal obtained by a decoder by means of decoding. The method includes: after splitting spectral coefficients of a current data frame into subbands, acquiring quantized frequency envelope values of the subbands; modifying quantized frequency envelope values of subbands of a first quantity in the subbands; allocating quantization bits to the subbands according to modified quantized frequency envelope values of the subbands of the first quantity; quantizing a spectral coefficient of a subband to which a quantization bit is allocated in the subbands; and writing the quantized spectral coefficient of the subband to which a quantization bit is allocated into a bitstream.

8. 发明申请

US20170142412A1 ENCODER, DECODER, SYSTEM AND METHODS FOR ENCODING AND DECODING 审中-公开
公开(公告)号：US20170142412A1
公开(公告)日：2017-05-18
申请号：US15417232
申请日：2017-01-27
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Guillaume FUCHS , Benjamin SCHUBERT , Grzegorz PIETRZYK , Markus MULTRUS , Bernhard GRILL
IPC分类号： H04N19/126 , H04N19/184 , H04N19/70 , H04N19/91 , H04N19/44
CPC分类号： H04N19/126 , G10L19/035 , H04N19/13 , H04N19/184 , H04N19/44 , H04N19/70 , H04N19/91
摘要： Embodiments of the present invention provide an encoder comprising a quantization stage, an entropy encoder, a residual quantization stage and a coded signal former. The quantization stage is configured to quantize an input signal using a dead zone in order to obtain a plurality of quantized values. The entropy encoder is configured to encode the plurality of quantized values using an entropy encoding scheme in order to obtain a plurality of entropy encoded values. The residual quantization stage is configured to quantize a residual signal caused by the quantization stage, wherein the residual quantization stage is configured to determine at least one quantized residual value in dependence on the dead zone of the quantization stage. The coded signal former is configured to form a coded signal from the plurality of entropy encoded values and the at least one quantized residual value.

9. 发明申请

US20170103768A1 AUDIO ENCODING METHOD AND APPARATUS 有权
公开(公告)号：US20170103768A1
公开(公告)日：2017-04-13
申请号：US15386246
申请日：2016-12-21
申请人： HUAWEI TECHNOLOGIES CO.,LTD.
发明人： Zhe Wang
IPC分类号： G10L19/22 , G10L19/035 , G10L19/02 , G10L19/06
CPC分类号： G10L19/22 , G10L19/02 , G10L19/0204 , G10L19/035 , G10L19/04 , G10L19/06 , G10L19/20 , G10L25/03
摘要： An audio encoding method and an apparatus are provided. The method includes: determining sparseness of distribution, on spectrums, of energy of N input audio frames (101), where the N audio frames include a current audio frame, and N is a positive integer; and determining, according to the sparseness of distribution, on the spectrums, of the energy of the N audio frames, whether to use a first encoding method or a second encoding method to encode the current audio frame (102), where the first encoding method is an encoding method that is based on time-frequency transform and transform coefficient quantization and that is not based on linear prediction, and the second encoding method is a linear-predication-based encoding method. The method can reduce encoding complexity and ensure that encoding is of relatively high accuracy.

10. 发明申请

US20170076728A1 SPEECH/AUDIO ENCODING APPARATUS AND METHOD THEREOF 审中-公开
标题翻译：语音/音频编码装置及其方法
公开(公告)号：US20170076728A1
公开(公告)日：2017-03-16
申请号：US15358184
申请日：2016-11-22
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Takuya KAWASHIMA , Masahiro OSHIKIRI
IPC分类号： G10L19/002 , G10L19/035 , G10L19/02
CPC分类号： G10L19/002 , G10L19/0208 , G10L19/035 , G10L19/06 , G10L19/12
摘要： A speech/audio encoding device for selectively allocating bits for higher precision encoding. The speech/audio encoding device receives a time-domain speech/audio input signal, transforms the speech/audio input signal into a frequency domain, and quantizes an energy envelope corresponding to an energy level for a frequency spectrum of the speech/audio input signal. The speech/audio encoding device further groups quantized energy envelopes into a plurality of groups, determines a perceptual significant group including one or more significant bands and a local-peak frequency, and allocates bits to a plurality of subbands corresponding to the grouped quantized energy envelopes, in which each of the subbands is obtained by splitting the frequency spectrum of the speech/audio input signal. The speech/audio encoding device encodes the frequency spectrum using the bits allocated to the subbands.
摘要翻译：用于选择性地分配比特以用于更高精度编码的语音/音频编码装置。语音/音频编码装置接收时域语音/音频输入信号，将语音/音频输入信号变换成频域，并量化对应于语音/音频输入信号的频谱的能级的能量包络。语音/音频编码装置进一步将量化的能量包络分组成多个组，确定包括一个或多个有效频带和局部峰值频率的感知有效组，并将比特分配给对应于分组的量化能量包络的多个子带，其中通过分割语音/音频输入信号的频谱来获得每个子带。语音/音频编码设备使用分配给子带的比特对频谱进行编码。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式