High Quality low delay (5 MS) sub-band audio coder (20 Hz-15 Khz) At w bit rate (64 Kbit/s)

摘要

In this paper, we present a new method for high quality audio coding at low delay and low bit rate for telecommunications applications such as audioconfe- rence or videoconference. The developped coder is adapted to code generic audio signals at a bit rate of 64 kbit/s with a delay close to 5 ms in the 20-15000 Hz bandwidth. The method is based on speech coding as well as audio coding concepts. The coder combines subband decomposition of the input signal and LD-CELP techniques.