Speech detection and recognition apparatus for use with backgrou

Speech detection circuit

Speech detector capable of avoiding an interruption by monitorin

Speech detector with improved line-fault immunity

Speech encoder

Speech encoding apparatus and related decoding apparatus

Speech encoding process combining written and spoken message cod

Speech encoding/decoding apparatus having selected encoders

Speech enhancement apparatus

Speech enhancement system having dynamic gain control

Speech enhancement techniques

Speech excitation source coder with coded amplitudes multiplied

Speech generation using variable frequency oscillators

Speech information extractor

Speech information transmission method and system

Speech information transmission method and system

Speech intelligibility enhancement

Speech message code modifying arrangement

Speech operated noise attenuation device

Speech parameter encoding method capable of transmitting a spect