Hybrid frequency-domain coding of speech signals
Abstract
A new method of speech coding called hybrid frequency-domain coding is introduced and its application to speech transmission at bit rates of 7.2 and 9.6 kbit/s is studied. The hybrid frequency-domain coding system is based on a combination of sub-band coding and transform coding techniques. Subjective tests have shown that the quality of speech produced by the hybrid frequency-domain technique at 7.2 kbit/s is comparable with 19 kbit/s continuously variable slope delta modulation (CVSD), and that at 9.6 kbit/s, it is comparable with 23 kbit/s CVSD.
- Publication:
-
IEE Proceedings F: Communications Radar and Signal Processing
- Pub Date:
- August 1983
- Bibcode:
- 1983IPCRS.130..459T
- Keywords:
-
- Channel Capacity;
- Frequency Response;
- Signal Encoding;
- Speech;
- Vocoders;
- Voice Communication;
- Delta Modulation;
- Fast Fourier Transformations;
- Pulse Code Modulation;
- Signal To Noise Ratios;
- Spectrum Analysis;
- Transmission Efficiency;
- Communications and Radar