Audio signal discontinuity correction processing system
AssigneeNtt Docomo, Inc.
InventorsKimitaka Tsutsumi, Kei Kikuiri, Atsushi Yamaguchi
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Abstract
An audio signal processing system and method is executed by an audio signal processing device to decode an audio packet to obtain decoded audio and determine an occurrence of a discontinuity occurring with a sudden increase of an amplitude of the decoded audio obtained by decoding the audio packet. The audio packet may be received correctly after an occurrence of a packet loss, and corrected to improve subjective quality of the decoded audio, wherein correcting the discontinuity of the decoded audio comprises causing distances between ISF/LSF parameters corresponding to a frame in which a packet loss has occurred to be equal.
Claims2
An audio signal processing method executed by an audio signal processing device, the method comprising:
- decoding an audio packet to obtain decoded audio;
- determining an occurrence of a discontinuity occurring with a sudden increase of an amplitude of the decoded audio obtained by decoding the audio packet, the audio packet received correctly after an occurrence of a packet loss, and
- correcting the discontinuity of the decoded audio to improve subjective quality of the decoded audio,
- wherein correcting the discontinuity of the decoded audio comprises causing distances between ISF/LSF parameters corresponding to a frame in which a packet loss has occurred to be equal.
Dependencies are inferred from the claim text.