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US 8,428,936 B2Granted
Decoder for audio signal including generic audio and speech frames
AssigneeMotorola Mobility LLC
InventorsUdar Mittal, Jonathan A. Gibbs, James P. Ashley
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Abstract
A method for decoding audio frames includes producing a first frame of coded audio samples, producing at least a portion of a second frame of coded audio samples, generating audio gap filler samples based on parameters representative of a weighted segment of the first frame of coded audio samples or a weighted segment of the portion of the second frame of coded audio samples, and forming a sequence including the audio gap filler samples and the portion of the second frame of coded audio samples.
Claims13
A method for decoding audio frames, the method comprising:
- producing, using a first decoding method, a first frame of coded audio samples;
- producing, using a second decoding method, at least a portion of a second frame of coded audio samples;
- generating audio gap filler samples based on parameters representative of a weighted segment of the first frame of coded audio samples or a weighted segment of the portion of the second frame of coded audio samples;
- forming a sequence including the audio gap filler samples and the portion of the second frame of coded audio samples;
- and
- generating the audio gap filler samples based on parameters representative of both the weighted segment of the first frame of coded audio samples and the weighted segment of the portion of the second frame of coded audio samples;
- wherein the parameters are based on an expression:
- ŝg=α·ŝs(−T1)+β·ŝa(T2)
- wherein α is a first weighting factor of a segment of the first frame of coded audio samples ŝs(−T1), β is a second weighting factor for a segment of the portion of the second frame of coded audio samples ŝα(T2), and ŝs corresponds to the audio gap filler samples.
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