3 accepted papers
A blind bandwidth extension (BBWE) expands the bandwidth of telephone speech which often is limited to 0.2 to 3.4 kHz. The advantage is an increased perceived quality as well as an increased intelligibility. This work presents a BBWE similar to state-of-the-art bandwidth extensions like Intelligent…
When coding audio signals at low bitrates with a transform coder the most prominent artifacts are spectral holes resulting from spectral lines being quantized to zero. State of the art codecs circumvent this by Noise Filling [1] and Bandwidth Extension (BWE) [2]. Both methods have in common that the…
At low bitrates, next generation audio coders apply waveform preserving transform coding only for the perceptually most relevant parts of the signal. The resulting spectral gaps are filled in the decoder through techniques like Intelligent Gap Filling (IGF). IGF is currently being standardized in MP…