ویراساینس.
سند علمی

Low bit rate high quality audio coding with combined harmonic and wavelet representations

Khaled N. Hamdy, Murtaza Ali, Ahmed H. Tewfik

چکیده

In this paper, we describe a novel high quality audio coding method using adaptive signal representation, based on si-nusoidal and wavelet analysis of signals. First, we perform a harmonic analysis of the signal to remove strong periodic structures or tones from the signal. Then we carry out wavelet analysis that are useful in tracking the transients of the signal. These transients are then removed from the wavelet coeecients. The remaining coeecients have broad-band noise-like structure. Since this method separates out tones (sinusoids), transients, and broadband noise, we may use tonal, noise, and temporal masking information to individually encode the tones and the wavelet coeecients. Our experiments suggest that this method yields a nominal bit rate of 1 bit/sample for high quality audio compression.

اسناد مشابه

  • Adaptive forward-backward quantizer for low bit rate high-quality speech coding

    سند علمی۱۹۹۷IEEE Trans. Speech and Audio ProcessingJozsef Vass, Yunxin Zhao, Xinhua Zhuang

    A novel variable rate linear predictive coding (LPC) parameter quantization scheme is proposed in which linear prediction is done by using either the current (forward LPC) or previously decoded (backward LPC) speech blocks. The proposed LPC quantization scheme was integrated into

  • High Quality Audio Coding at Low Bit Rate Using Wavelet and Wavelet Packet Transform

    سند علمی۲۰۰۹SONAM DUBEY

    Audio coding is widely used in application such as digital broadcasting, Internet audio or music database to reduce the bit rate of high quality audio signal without comprising the perceptual quality. In this paper work high quality audio codec at low bit rate using wavelet trans

  • New results in low bitrate audio coding using a combined harmonic-wavelet representation

    سند علمی۱۹۹۷ICASSPSimon Boland, Mohamed A. Deriche

    In this paper, we propose a new combined harmonic-wavelet representation for audio where a harmonic analysis-synthesis scheme is used, rst, to approximate each audio frame as a sum of several sinusoids. Then, the di erence between the original signal and the reconstructed harmoni

  • Optimum bit allocation and decomposition for high quality audio coding

    سند علمی۱۹۹۷ICASSPXiang Wei, Martyn J. Shaw, Martin R. Varley

    Current audio compression schemes are capable of reducing the per channel bit rate of high quality audio signals from 16 bits per sample to around 2-4 bits per sample. In these schemes, knowledge of psychoacoustics is utilised and a uniform or nonuniform frequency decomposition m

  • High Quality Audio Compression Using anAdaptive Wavelet Packet Decomposition andPsychoacoustic

    سند علمی۱۹۹۹Pramila Srinivasan, Leah H. Jamieson, P. Srinivasan

    | This paper presents a technique to incorporate psychoacoustic models into an adaptive wavelet packet scheme to achieve perceptually transparent compression of high quality(44.1 KHz) audio signals at about 45 KBits/sec. The lter bank structure adapts according to psychoacous-tic

  • Lar Video: Hierarchical Representation for Low Bit-rate Color Image Sequence Coding

    سند علمی۲۰۰۷Erwan Flécher, Marie Babel, Olivier Déforges, Véronique Coat

    LAR video is a low complexity system for low bit-rate color image sequence encoding. It aims to propose a joint solution for coding and representation of the frame content. In particular, it allows to provide a compressed description of both chromatic components and motion inform