This paper reports on some improvements to the audio-coding method transform-domain weighted interleave vector quantization (TwinVQ). In the encoder, the frequency-domain coefficients are flattened at two stages before vector quantization is applied. The paper also introduces Bark-scale envelope coding. There are three frame modes to change time/frequency discrimination. According to the subjective quality tests, reproduction quality of 40 kb/s TwinVQ exceeded that of MPEG : Layer III.
Iwakami, Naoki; Moriya, Takehiro
Affiliation: NTT Human Interface Laboratories, Musashino-shi, Tokyo, Japan
AES Convention: 101 (November 1996) Paper Number: 4377
Publication Date: November 1, 1996
Subject: Low Bit-Rate Audio Coding
No AES members have commented on this paper yet.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.