Methods and apparatus for coding and decoding highband part of voice signal
A voice signal, high-frequency band technology, applied in the field of signal processing, can solve the problem that the rough spectral envelope or formant structure of the voice signal cannot be accurately predicted.
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[0059] Embodiments described herein include systems, methods, and apparatus that can be configured to provide extensions to narrowband speech coders to support transmission and / or storage of wideband speech signals with only about an 800-1000 bps (bits per second) increase in bandwidth. Potential advantages of such implementations include embedded coding to support compatibility with narrowband systems, relatively easy allocation and reallocation of bits between narrowband and highband coded channels, avoiding computationally expensive wideband synthesis operation, and to maintain a low sample rate for signals to be processed by computationally intensive waveform encoding routines.
[0060] Unless specifically limited by context, the term "calculate" is used herein to mean any of its ordinary meanings, such as calculating, generating, and selecting from a list of values. When the term "comprising" is used in the description and claims, it does not exclude other elements or ope...
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