FIELD: physics.SUBSTANCE: hybrid speech amplifying method uses parametric encoding amplification for some signal states and waveform encoding amplification for the remaining signal states. Other aspects are methods for generating a bitstream indicating a sound program including speech and other content such that hybrid speech amplification can be performed in relation to the program, a decoder including a buffer that stores, at least, one segment of the encoded audio bitstream generated by any embodiment implementing the inventive method, and a system or a device configured to perform any embodiment of the inventive method. At least, some of the speech amplifying operations are performed by the receiving audio decoder using the medium/side channel speech metadata generated by the upstream audio encoder.EFFECT: increasing the audibility of the audio signal speech contents with respect to the non-speech audio content.37 cl, 11 dwg
HYBRID SPEECH AMPLIFICATION WITH SIGNAL FORM CODING AND PARAMETRIC CODING