Turbo-detected unequal protection audio and speech transceivers using serially concantenated convolutional codes, trellis coded modulation and space-time trellis coding

N.S. Othman, S.X. Ng, L. Hanzo
VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference, 2005.  
The MPEG-4 TwinVQ audio codec and the AMR-WB speech codec are investigated in the context of a jointly optimised turbo transceiver capable of providing unequal error protection. The transceiver advocated consists of serially concatenated Space-Time Trellis Coding (STTC), Trellis Coded Modulation (TCM) and two different-rate Non-Systematic Convolutional codes (NSCs) used for unequal error protection. A benchmarker scheme combining STTC and a single-class protection NSC is used for comparison
more » ... the proposed scheme. The audio and speech performance of both schemes is evaluated, when communicating over uncorrelated Rayleigh fading channels. An E b /N0 value of about 2.5 (3.5) dB is required for near-unimpaired audio (speech) transmission, which is about 3.07 (4.2) dB from the capacity of the system.
doi:10.1109/vetecf.2005.1558085 fatcat:kgi5yvd6prfdxjq235if4jqjfa