Title :
Variable rate coding scheme for audio signal with subband and embedded coding techniques
Author :
Suzuki, Junji ; Ohta, N.
Author_Institution :
Transmission Syst. Lab., NTT, Yokosuka, Japan
Abstract :
A novel audio coding scheme is presented for the transmission of music signals with about 20 kHz bandwidth in asynchronous-transfer-mode-based networks. The coding algorithm is based on subband division and embedded ADPCM (adaptive differential pulse-code modulation) techniques in order to minimize the quality degradation by packet loss and to meet the various service grade demands on performance. The advantages of the proposed algorithm are investigated theoretically and compared to those of conventional embedded ADPCM. The SNR improvements are computed using actual radio signals. Rate control strategies are briefly discussed in case of packet loss
Keywords :
audio signals; encoding; pulse-code modulation; ADPCM; SNR improvements; adaptive differential pulse-code modulation; asynchronous-transfer-mode-based networks; audio coding scheme; embedded coding techniques; music signals; packet loss; subband division; variable rate coding scheme; Asynchronous transfer mode; Audio coding; Bandwidth; Degradation; Encoding; Feedback loop; Multiple signal classification; Quantization; Signal to noise ratio; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266395
