Current telephone networks compromise bandwidth for ef-ficiency. The impairment of the audio quality in telephony has become a problem for the rapidly emerging sophisticated wideband telecommunications systems. We present a classi-fied bandwidth extension algorithm which recovers the miss-ing highband portion of telephony signals. We describe a new highband excitation generator, a Pitch-Synchronized-BandPass-Shifted-Sum excitation for strongly harmonic sig-nals such as some voiced phonemes or some music audio signals. For other signals, a BandPass Envelope Modulated Gaussian Noise is used as the highband excitation. The high-band spectrum envelope and the excitation gain are esti-mated using classified Gaussian Mixture Models. Objective mea...
Abstract—Today’s telecommunications systems use a limited audio signal bandwidth. A typical bandwidt...
We present a new bandwidth extension algorithm for convert-ing narrowband telephone speech into wide...
Storage or transmission of audio signals is often subject to strict bitrate constraints. This is acc...
The public switched telephone network (PSTN) restricts the acoustic bandwidth of telephonyspeech to ...
Bandwidth extenstion methods are required in systems that playback bandlimited signals (e.g. telepho...
The bandwidth for telephony is generally defined to be from 300–3400 Hz. This bandwidth restriction ...
The use of perceptually based (lossy) audio codecs, like MPEG 1 - layer 3 (`mp3'), has become very p...
The use of perceptually based (lossy) audio codecs, like MPEG 1 - layer 3 (`mp3'), has become very p...
The use of perceptually based (lossy) audio codecs, like MPEG 1 - layer 3 (`mp3'), has become very p...
Bandwidth extenstion methods are required in systems that playback bandlimited signals (e.g. telepho...
Most existing telephone networks transmit narrowband coded speech which has been bandlimited to 4 kH...
Selecting the high-band spectral envelope prediction technique and high-band excitation synthesis sc...
The bandwidth of telephone speech is limited to a 300 – 3400 Hz bandwidth. The sound quality is much...
Selecting the high-band spectral envelope prediction technique and high-band excitation synthesis sc...
Telephone speech often sounds muffled and thin due to its narrowband characteristics. With the incr...
Abstract—Today’s telecommunications systems use a limited audio signal bandwidth. A typical bandwidt...
We present a new bandwidth extension algorithm for convert-ing narrowband telephone speech into wide...
Storage or transmission of audio signals is often subject to strict bitrate constraints. This is acc...
The public switched telephone network (PSTN) restricts the acoustic bandwidth of telephonyspeech to ...
Bandwidth extenstion methods are required in systems that playback bandlimited signals (e.g. telepho...
The bandwidth for telephony is generally defined to be from 300–3400 Hz. This bandwidth restriction ...
The use of perceptually based (lossy) audio codecs, like MPEG 1 - layer 3 (`mp3'), has become very p...
The use of perceptually based (lossy) audio codecs, like MPEG 1 - layer 3 (`mp3'), has become very p...
The use of perceptually based (lossy) audio codecs, like MPEG 1 - layer 3 (`mp3'), has become very p...
Bandwidth extenstion methods are required in systems that playback bandlimited signals (e.g. telepho...
Most existing telephone networks transmit narrowband coded speech which has been bandlimited to 4 kH...
Selecting the high-band spectral envelope prediction technique and high-band excitation synthesis sc...
The bandwidth of telephone speech is limited to a 300 – 3400 Hz bandwidth. The sound quality is much...
Selecting the high-band spectral envelope prediction technique and high-band excitation synthesis sc...
Telephone speech often sounds muffled and thin due to its narrowband characteristics. With the incr...
Abstract—Today’s telecommunications systems use a limited audio signal bandwidth. A typical bandwidt...
We present a new bandwidth extension algorithm for convert-ing narrowband telephone speech into wide...
Storage or transmission of audio signals is often subject to strict bitrate constraints. This is acc...