TwinVQ is an audio encoding technology developed at NTT (Nippon Telephone and Telegraph). It uses an unique technology called Vector Quantization (VQ) for encoding.

The format using the TwinVQ technology is called VQF. There are several limitations in this format: 2 channels at most, no VBR, extremely slow, few support. It can pretty safely be considered dead these days.

TwinVQ, on the other hand, is still alive as part of the MPEG4 audio standard, being featured at extremely small bitrates (8-16kbps).

The NTT TwinVQ page is available here.

I am also mirroring Thor's page from dalnetvqf, featuring VQF plugins for Winamp. Thanks to Thor for providing these files.

Date: 1998-03-11
Version: 2.1.1
Interface: Graphical User Interface
Platform: Win32
Download: NTTenc.zip - 514Kb
Winamp Plugin: in_vqf.exe - 419Kb