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US 2016/0240202 A1Published application
Audio signal processing device, audio signal processing method, and audio signal processing program
AssigneeNtt Docomo, Inc.
InventorsKimitaka TSUTSUMI, Kei KIKUIRI, Atsushi YAMAGUCHI
Life of this patent
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Abstract
An audio signal processing device comprises a discontinuity detector configured to determine an occurrence of a discontinuity from a sudden increase of an amplitude of decoded audio obtained by decoding the first audio packet which is received correctly after an occurrence of a packet loss, and a discontinuity corrector for correcting the discontinuity of the decoded audio.
Claims21
An audio signal processing device comprising:
- a discontinuity detector configured to determine an occurrence of a discontinuity of decoded audio from a sudden increase of amplitude of the decoded audio, the decoded audio being obtained by decoding a first audio packet that is received correctly after an occurrence of a packet loss;
- and
- a discontinuity corrector configured to correct the discontinuity of the decoded audio.
An audio signal processing device comprising:
- an ISF/LSF quantizer configured to quantize ISF/LSF parameters;
- an ISF/LSF concealer configured to generate concealment ISF/LSF parameters representative of concealment information about the ISF/LSF parameters;
- a discontinuity detector configured to determine an occurrence of a discontinuity which occurs in a first audio packet which is received correctly after an occurrence of a packet loss, the discontinuity detector being configured to use distances between quantized ISF/LSF parameters obtained by the ISF/LSF quantizer and the concealment ISF/LSF parameters generated by the ISF/LSF concealer to determine an occurrence of a discontinuity;
- and
- an auxiliary information encoder configured to encode auxiliary information for determination on an occurrence of a discontinuity.
2 more elements
An audio signal processing device comprising:
- a discontinuity detector configured to determine an occurrence of a discontinuity which occurs in a first audio packet which is received correctly after an occurrence of a packet loss;
- an auxiliary information encoder configured to encode auxiliary information for determination on an occurrence of a discontinuity;
- and
- an ISF/LSF quantizer configured to use past quantized ISF/LSF residual parameters for ISF/LSF quantization of a given frame when the discontinuity detector does not determine an occurrence of a discontinuity, and avoid using the past quantized ISF/LSF residual parameters for the ISF/LSF quantization of the given frame when the discontinuity detector determines an occurrence of a discontinuity.
1 more element
An audio signal processing device comprising:
- an auxiliary information decoder configured to decode and output auxiliary information for determination on an occurrence of a discontinuity of a decoded audio which occurs in a first audio packet which is received correctly after an occurrence of a packet loss;
- a discontinuity corrector configured to correct the discontinuity of the decoded audio;
- and
- an ISF/LSF decoder configured to use past quantized ISF/LSF residual parameters for ISF/LSF calculation of a given frame when the auxiliary information output by the auxiliary information decoder does not indicate an occurrence of a discontinuity and avoid using the past quantized ISF/LSF residual parameters for the ISF/LSF calculation of the given frame when the auxiliary information output by the auxiliary information decoder indicates an occurrence of a discontinuity.
1 more element
An audio signal processing method to be executed by an audio signal processing device, comprising:
- determining an occurrence of a discontinuity of decoded audio from a sudden increase of an amplitude of the decoded audio, the decoded audio being obtained by decoding a first audio packet which is received correctly after an occurrence of a packet loss;
- and
- correcting the discontinuity of the decoded audio.
An audio signal processing method to be executed by an audio signal processing device, comprising:
- quantizing ISF/LSF parameters;
- generating concealment ISF/LSF parameters being representative of concealment information about the ISF/LSF parameters;
- determining an occurrence of a discontinuity which occurs in a first audio packet which is received correctly after an occurrence of a packet loss, determining an occurrence of a discontinuity comprising using distances between quantized ISF/LSF parameters and the generated concealment ISF/LSF parameters;
- and
- encoding auxiliary information for determination on an occurrence of a discontinuity.
2 more elements
An audio signal processing method to be executed by an audio signal processing device, comprising:
- determining an occurrence of a discontinuity which occurs in a first audio packet which is received correctly after an occurrence of a packet loss;
- encoding auxiliary information for determination on an occurrence of a discontinuity;
- and
- using past quantized ISF/LSF residual parameters for ISF/LSF quantization of a given frame when an occurrence of a discontinuity is not determined and avoiding using the past quantized ISF/LSF residual parameters for the ISF/LSF quantization of the given frame when an occurrence of a discontinuity is determined.
1 more element
An audio signal processing method to be executed by an audio signal processing device, comprising:
- decoding and outputting auxiliary information for determination on an occurrence of a discontinuity of a decoded audio which occurs in a first audio packet which is received correctly after an occurrence of a packet loss;
- correcting the discontinuity of the decoded audio;
- and
- using past quantized ISF/LSF residual parameters for ISF/LSF calculation of a given frame when the auxiliary information does not indicate an occurrence of a discontinuity, and avoiding using the past quantized ISF/LSF residual parameters for the ISF/LSF calculation in the given frame when the auxiliary information indicates an occurrence of a discontinuity.
1 more element
A non-transitory storage medium that stores an audio signal processing program that programs a computer to operate as:
- a discontinuity detector operable to determine an occurrence of a discontinuity of a decoded audio from a sudden increase of an amplitude of the decoded audio, the decoded audio being obtained by decoding a first audio packet which is received correctly after an occurrence of a packet loss;
- and
- a discontinuity corrector operable to correct the discontinuity of the decoded audio.
A non-transitory storage medium that stores an audio signal processing program that programs a computer to operate as:
- an ISF/LSF quantizer operable to quantize ISF/LSF parameters;
- an ISF/LSF concealer operable to generate concealment ISF/LSF parameters being representative of concealment information about the ISF/LSF parameters;
- a discontinuity detector operable to determine an occurrence of a discontinuity which occurs in a first audio packet which is received correctly after an occurrence of a packet loss, the discontinuity detector being operable to use distances between quantized ISF/LSF parameters obtained by the ISF/LSF quantizer and the concealment ISF/LSF parameters generated by the ISF/LSF concealer in order to determine an occurrence of a discontinuity;
- and
- an auxiliary information encoder operable to encode auxiliary information for determination on an occurrence of a discontinuity.
2 more elements
A non-transitory storage medium that stores an audio signal processing program that programs a computer to operate as:
- a discontinuity detector operable to determine an occurrence of a discontinuity which occurs in a first audio packet which is received correctly after an occurrence of a packet loss;
- an auxiliary information encoder operable to encode auxiliary for determination on an occurrence of a discontinuity;
- and
- an ISF/LSF quantizer operable to use past quantized ISF/LSF residual parameters for ISF/LSF quantization of a given frame when the discontinuity detector does not determine an occurrence of a discontinuity, and avoid using the past quantized ISF/LSF residual parameters for the ISF/LSF quantization of the given frame when the discontinuity detector determines an occurrence of a discontinuity.
1 more element
A non-transitory storage medium that stores an audio signal processing program that programs a computer to operate as:
- an auxiliary information decoder operable to decode and output auxiliary information for determination on an occurrence of a discontinuity of a decoded audio which occurs in a first audio packet which is received correctly after an occurrence of a packet loss;
- a discontinuity corrector operable to correct the discontinuity of the decoded audio;
- and
- an ISF/LSF decoder operable to use past quantized ISF/LSF residual parameters for ISF/LSF calculation of a given frame when the auxiliary information does not indicate an occurrence of a discontinuity, and avoid using the past quantized ISF/LSF residual parameters for the ISF/LSF calculation of the given frame when the auxiliary information indicates an occurrence of a discontinuity.
1 more element
Dependencies are inferred from the claim text.