Hvxc

[streaming machines]

Let's discuss technical aspects of speech codecs like HVXC, speex etc.

[streaming machines]

Harmonic Vector Excitation Coding (HVXC) is a part of the MPEG4 audio coding standard and is used to code narrowband (8 kHz sampling rate) speech at 2 or 4 kbits/sec. The 2 kbits/sec version is referred to as the base layer, and the 4 kbits/sec version as the enhanced layer. The coder also supports a variable rate mode at 1.2 to 1.7 kbits/sec. The coder is LP based, vector quantizes the spectral shape of the LP residual for voiced frames, and employs a CELP scheme (also referred to as vector excitation (VXC)) to encode the LP residual for unvoiced frames instead of synthesizing the unvoiced excitation with random noise.

[nakTT]

Sorry for bump up this old thread.

Just want to ask any of the forumers here. Is there any way I can convert my mp3 speech to this HVXC format and play it on my PC. I have tried with AMR-NB @ around 5kbps and the result is good. Just curious about this HVXC since it offer lower bitrate.

Thank you in advance.