An embedded sinusoidal transform codec with measured phases and sampling rate scalability
ICASSP '00 Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 02（2000）
Abstract
This paper describes an embedded sinusoidal transform codec that is scalable not only in bit-rate, but also in sampling rate. In a representative implementation, the system produces an embedded bit-stream at 3.2 and 6.4 kbit/s for telephone-bandwidth speech, and scales up to 9.6 kbit/s for 16 kHz sampled wideband speech. The 3.2 kbit/s codec is a sinusoidal transform codec with synthetic phases. The 6.4 kbit/s codec adds resolution to the spectral envelope and transmits measured phases of the eight lowest harmonics. The 9.6 kbit/s codec adds information in the 4 to 8 kHz band to provide higher quality wideband speech.
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Key words
embedded bit-stream,sampling rate scalability,khz band,measured phase,higher quality wideband speech,representative implementation,wideband speech,lowest harmonic,telephone-bandwidth speech,spectral envelope,embedded sinusoidal,sampling rate,transform coding,scalability,speech coding,speech codec,bandwidth,decoding,sampling methods
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