Patents by Inventor Fengyan Qi
Fengyan Qi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9881626Abstract: A vector joint encoding/decoding method and a vector joint encoder/decoder are provided, more than two vectors are jointly encoded, and an encoding index of at least one vector is split and then combined between different vectors, so that encoding idle spaces of different vectors can be recombined, thereby facilitating saving of encoding bits, and because an encoding index of a vector is split and then shorter split indexes are recombined, thereby facilitating reduction of requirements for the bit width of operating parts in encoding/decoding calculation.Type: GrantFiled: April 13, 2017Date of Patent: January 30, 2018Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Fuwei Ma, Dejun Zhang, Lei Miao, Fengyan Qi
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Patent number: 9875749Abstract: A method for predicting a bandwidth extension frequency band signal includes demultiplexing a received bitstream to obtain a frequency domain signal; determining whether a highest frequency bin, to which a bit is allocated, of the frequency domain signal is less than a preset start frequency bin of a bandwidth extension frequency band; predicting an excitation signal of the bandwidth extension frequency band according to the determination; and predicting the bandwidth extension frequency band signal according to the predicted excitation signal of the bandwidth extension frequency band and a frequency envelope of the bandwidth extension frequency band.Type: GrantFiled: May 4, 2016Date of Patent: January 23, 2018Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Zexin Liu, Lei Miao, Fengyan Qi
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Publication number: 20170352359Abstract: In a signal coding method, bits for coding allocated to different bands of a frequency domain signal obtained from an input signal are adjusted to improve the coding quality. The total available bits for coding are first allocated to the bands of the frequency domain signal according to a predetermined allocation rule. The numbers of bits allocated to the respective bands of the frequency domain signal are then adjusted when a highest frequency of the frequency domain signal to which bits are allocated is greater than a predetermined value. The frequency domain signal is coded according to the adjusted bit allocation for the bands of the frequency domain signal.Type: ApplicationFiled: August 23, 2017Publication date: December 7, 2017Inventors: Zexin Liu, Lei Miao, Fengyan Qi
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Patent number: 9830914Abstract: A method and device for decoding a signal. The method for decoding a signal includes: obtaining spectral coefficients of sub-bands from a received bitstream by means of decoding; classifying sub-bands in which the spectral coefficients are located into a sub-band with saturated bit allocation and a sub-band with unsaturated bit allocation; performing noise filling on a spectral coefficient that has not been obtained by means of decoding and is in the sub-band with unsaturated bit allocation, so as to restore the spectral coefficient that has not been obtained by means of decoding; and obtaining a frequency domain signal according to the spectral coefficients obtained by means of decoding and the restored spectral coefficient. Therefore, a sub-band with unsaturated bit allocation in a frequency domain signal may be obtained by classification, thereby improving signal decoding quality.Type: GrantFiled: March 7, 2017Date of Patent: November 28, 2017Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Zexin Liu, Fengyan Qi, Lei Miao
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Publication number: 20170323652Abstract: System and method embodiments are provided for very short pitch detection and coding for speech or audio signals. The system and method include detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in time domain and detecting a lack of low frequency energy in the speech or audio signal in frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation that is smaller than the conventional minimum pitch limitation.Type: ApplicationFiled: July 28, 2017Publication date: November 9, 2017Applicant: HUAWEI TECHNOLOGIES CO.,LTD.Inventors: Yang Gao, Fengyan Qi
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Patent number: 9786293Abstract: In a signal coding method, bits for coding allocated to different bands of a frequency domain signal obtained from an input signal are adjusted to improve the coding quality. The total available bits for coding are first allocated to the bands of the frequency domain signal according to a predetermined allocation rule. The numbers of bits allocated to the respective bands of the frequency domain signal are then adjusted when a highest frequency of the frequency domain signal to which bits are allocated is greater than a predetermined value. The frequency domain signal is coded according to the adjusted bit allocation for the bands of the frequency domain signal.Type: GrantFiled: November 22, 2016Date of Patent: October 10, 2017Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Zexin Liu, Lei Miao, Fengyan Qi
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Publication number: 20170270944Abstract: An audio signal decoding method includes: obtaining mode information of a high frequency band signal of an audio signal and indices of a low frequency band signal of the audio signal by parsing a received bitstream; obtaining the low frequency band signal based on the indices; predicting an excitation signal of a high frequency band signal based on the low frequency band signal; and reconstructing the high frequency band signal based on the frequency envelope and the excitation signal. A manner for obtaining the frequency envelope of the high frequency band signal when mode information indicates the high frequency band signal is a harmonic type signal is different from a manner for obtaining the frequency envelope of the high frequency band signal when the mode information indicates the high frequency band signal is not a harmonic type signal.Type: ApplicationFiled: June 6, 2017Publication date: September 21, 2017Applicant: HUAWEI TECHNOLOGIES CO.,LTD.Inventors: Zexin Liu, Lei Miao, Fengyan Qi
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Patent number: 9741357Abstract: System and method embodiments are provided for very short pitch detection and coding for speech or audio signals. The system and method include detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in time domain and detecting a lack of low frequency energy in the speech or audio signal in frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation that is smaller than the conventional minimum pitch limitation.Type: GrantFiled: June 19, 2015Date of Patent: August 22, 2017Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Yang Gao, Fengyan Qi
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Publication number: 20170221493Abstract: A vector joint encoding/decoding method and a vector joint encoder/decoder are provided, more than two vectors are jointly encoded, and an encoding index of at least one vector is split and then combined between different vectors, so that encoding idle spaces of different vectors can be recombined, thereby facilitating saving of encoding bits, and because an encoding index of a vector is split and then shorter split indexes are recombined, thereby facilitating reduction of requirements for the bit width of operating parts in encoding/decoding calculation.Type: ApplicationFiled: April 13, 2017Publication date: August 3, 2017Applicant: HUAWEI TECHNOLOGIES CO.,LTD.Inventors: Fuwei Ma, Dejun Zhang, Lei Miao, Fengyan Qi
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Patent number: 9704500Abstract: A method includes obtaining a signal type of an audio signal and a low frequency band signal of the audio signal, where the audio signal includes the low frequency band signal and a high frequency band signal; obtaining a frequency envelope of the high frequency band signal according to the signal type; predicting an excitation signal of the high frequency band signal according to the low frequency band signal; and restoring the high frequency band signal according to the frequency envelope of the high frequency band signal and the excitation signal of the high frequency band signal. By using the technical solutions of the embodiments of the present invention, an error existing between a high frequency band signal obtained by prediction and an actual high frequency band signal can be effectively reduced, and an accuracy rate of the predicted high frequency band signal can be increased.Type: GrantFiled: July 24, 2015Date of Patent: July 11, 2017Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Zexin Liu, Lei Miao, Fengyan Qi
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Patent number: 9704498Abstract: A vector joint encoding/decoding method and a vector joint encoder/decoder are provided, more than two vectors are jointly encoded, and an encoding index of at least one vector is split and then combined between different vectors, so that encoding idle spaces of different vectors can be recombined, thereby facilitating saving of encoding bits, and because an encoding index of a vector is split and then shorter split indexes are recombined, thereby facilitating reduction of requirements for the bit width of operating parts in encoding/decoding calculation.Type: GrantFiled: June 24, 2016Date of Patent: July 11, 2017Assignee: Huawei Technologies Co., Ltd.Inventors: Fuwei Ma, Dejun Zhang, Lei Miao, Fengyan Qi
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Publication number: 20170194016Abstract: A method and an apparatus for detecting correctness of a pitch period. The method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal; determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal; and determining correctness of the initial pitch period according to the pitch period correctness decision parameter. The method and apparatus for detecting correctness of a pitch period according to the embodiments of the present invention can improve, based on a relatively less complex algorithm, accuracy of detecting correctness of a pitch period.Type: ApplicationFiled: March 23, 2017Publication date: July 6, 2017Applicant: HUAWEI TECHNOLOGIES CO.,LTD.Inventors: Fengyan Qi, Lei Miao
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Publication number: 20170178633Abstract: A method and device for decoding a signal. The method for decoding a signal includes: obtaining spectral coefficients of sub-bands from a received bitstream by means of decoding; classifying sub-bands in which the spectral coefficients are located into a sub-band with saturated bit allocation and a sub-band with unsaturated bit allocation; performing noise filling on a spectral coefficient that has not been obtained by means of decoding and is in the sub-band with unsaturated bit allocation, so as to restore the spectral coefficient that has not been obtained by means of decoding; and obtaining a frequency domain signal according to the spectral coefficients obtained by means of decoding and the restored spectral coefficient. Therefore, a sub-band with unsaturated bit allocation in a frequency domain signal may be obtained by classification, thereby improving signal decoding quality.Type: ApplicationFiled: March 7, 2017Publication date: June 22, 2017Applicant: HUAWEI TECHNOLOGIES CO.,LTD.Inventors: Zexin Liu, Fengyan Qi, Lei Miao
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Patent number: 9672830Abstract: A voice signal encoding and decoding method, device, and codec system are provided. The coding method includes: encoding an input voice signal to obtain a broadband code stream, where the broadband code stream includes a core layer bit stream and an extension enhancement layer bit stream (101); compressing the core layer bit stream to obtain a compressed code stream (102); and packing the compressed code stream and the extension enhancement layer bit stream to obtain a packed code stream (103). The core layer bit stream is compressed, and the compressed code stream and the extension enhancement layer bit stream are packed, thereby reducing transmission bandwidth occupied by the input voice signal. Since the broadband voice encoding is performed on the input voice signal, a broadband voice code stream is transmitted by using narrowband transmission bandwidth, thereby improving the cost performance of voice signal transmission.Type: GrantFiled: October 1, 2012Date of Patent: June 6, 2017Assignee: Huawei Technologies Co., Ltd.Inventors: Fengyan Qi, Lei Miao
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Patent number: 9633666Abstract: A method and an apparatus for detecting correctness of a pitch period. The method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal; determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal; and determining correctness of the initial pitch period according to the pitch period correctness decision parameter. The method and apparatus for detecting correctness of a pitch period according to the embodiments of the present invention can improve, based on a relatively less complex algorithm, accuracy of detecting correctness of a pitch period.Type: GrantFiled: November 17, 2014Date of Patent: April 25, 2017Assignee: HUAWEI TECHNOLOGIES, CO., LTD.Inventors: Fengyan Qi, Lei Miao
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Patent number: 9626972Abstract: A method and device for decoding a signal. The method for decoding a signal includes: obtaining spectral coefficients of sub-bands from a received bitstream by means of decoding; classifying sub-bands in which the spectral coefficients are located into a sub-band with saturated bit allocation and a sub-band with unsaturated bit allocation; performing noise filling on a spectral coefficient that has not been obtained by means of decoding and is in the sub-band with unsaturated bit allocation, so as to restore the spectral coefficient that has not been obtained by means of decoding; and obtaining a frequency domain signal according to the spectral coefficients obtained by means of decoding and the restored spectral coefficient. Therefore, a sub-band with unsaturated bit allocation in a frequency domain signal may be obtained by classification, thereby improving signal decoding quality.Type: GrantFiled: June 4, 2015Date of Patent: April 18, 2017Assignee: Huawei Technologies Co., Ltd.Inventors: Zexin Liu, Fengyan Qi, Lei Miao
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Publication number: 20170076733Abstract: In a signal coding method, bits for coding allocated to different bands of a frequency domain signal obtained from an input signal are adjusted to improve the coding quality. The total available bits for coding are first allocated to the bands of the frequency domain signal according to a predetermined allocation rule. The numbers of bits allocated to the respective bands of the frequency domain signal are then adjusted when a highest frequency of the frequency domain signal to which bits are allocated is greater than a predetermined value. The frequency domain signal is coded according to the adjusted bit allocation for the bands of the frequency domain signal.Type: ApplicationFiled: November 22, 2016Publication date: March 16, 2017Inventors: Zexin Liu, Lei Miao, Fengyan Qi
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Publication number: 20170069329Abstract: A method and an apparatus for allocating bits of an audio signal. The method includes dividing a frequency band of an audio signal into multiple sub-bands, and quantizing a sub-band normalization factor of each sub-band; classifying the multiple sub-bands into multiple groups, and acquiring a sum of intra-group sub-band normalization factors of each group; performing initial inter-group bit allocation to determine the initial number of bits of each group; performing secondary inter-group bit allocation to allocate coding bits of the audio signal to at least one group; and allocating the bits of the audio signal to sub-bands in the group. The present disclosure can, by means of grouping, ensure relatively stable allocation in a previous frame and a next frame and reduce an impact of global allocation on local discontinuity in a case of low and medium bit rates.Type: ApplicationFiled: November 17, 2016Publication date: March 9, 2017Inventors: Fengyan Qi, Zexin Liu, Lei Miao
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Patent number: 9537694Abstract: In a signal coding method, bits for coding allocated to different bands of a frequency domain signal obtained from an input signal are adjusted to improve the coding quality. The total available bits for coding are first allocated to the bands of the frequency domain signal according to a predetermined allocation rule. The numbers of bits allocated to the respective bands of the frequency domain signal are then adjusted when a highest frequency of the frequency domain signal to which bits are allocated is greater than a predetermined value. The frequency domain signal is coded according to the adjusted bit allocation for the bands of the frequency domain signal.Type: GrantFiled: September 25, 2014Date of Patent: January 3, 2017Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Zexin Liu, Lei Miao, Fengyan Qi
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Patent number: 9530420Abstract: A method and an apparatus for allocating bits of an audio signal. The method includes dividing a frequency band of an audio signal into multiple sub-bands, and quantizing a sub-band normalization factor of each sub-band; classifying the multiple sub-bands into multiple groups, and acquiring a sum of intra-group sub-band normalization factors of each group; performing initial inter-group bit allocation to determine the initial number of bits of each group; performing secondary inter-group bit allocation to allocate coding bits of the audio signal to at least one group; and allocating the bits of the audio signal to sub-bands in the group. The present invention can, by means of grouping, ensure relatively stable allocation in a previous frame and a next frame and reduce an impact of global allocation on local discontinuity in a case of low and medium bit rates.Type: GrantFiled: March 31, 2015Date of Patent: December 27, 2016Assignee: Huawei Technologies Co., Ltd.Inventors: Fengyan Qi, Zexin Liu, Lei Miao