Method and apparatus to encode and/or decode signal using...

Details Method and apparatus to encode and/or decode signal using... Method and apparatus to encode and/or decode signal using...

2011-01-04

2011-01-04

Tran, Khanh C (Department: 2611)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C704S264000

Reexamination Certificate

active

07864843

ABSTRACT:
A method and apparatus to perform bandwidth extension encoding and decoding encodes and/or decodes a high frequency signal using an excitation signal for a low frequency signal encoded in a time domain or a frequency domain or using an excitation spectrum for the low frequency signal. Accordingly, although an audio signal is encoded or decoded using a small number of bits, the quality of sound corresponding to a signal in a high frequency band does not degrade. Therefore, a coding efficiency of the audio signal can be maximized.

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Qian, Y. et. al. ‘Combining Equalization and Estimation for Bandwidth Extension of Narrowband Speech’ In: Proceedings of the 2004 IEEE International Conference on Acoustics, Speech, and Signal Processing. IEEE, May 17, 2004, vol. I, pp. 1-713-716.
Valin, J.M. et al. ‘Bandwidth Extension of Narrowband Speech for Low Bit-Rate Wideband Coding’ In: Proceedings of the 2000 IEEE Workshop On Speeh Coding. IEEE, Sep. 17, 2000, pp. 130-132.

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