DECODER FOR AUDIO SIGNALS BELONGING TO COMPRESSED AND CODED AUDIOVISUAL STREAMS

摘要

A decoder for audio signals belonging to audio-visual streams coded in accordance withstandard ISO/IEC 11172 is provided. Said decoder comprises a presentation unit (UP)which is controlled by a first and a second clock signal, depending on the desiredsampling rate, and is associated to means (SAV) managing audio-video synchronisation.The latter means start the presentation of output data by comparing a first timing signal(SCR), representative of a system clock signal, and a second timing signal (PTS),representative of a correct instant of data presentation, independently generate the twoclock signals (CLK24, CLK22) and correct the signal corresponding to the desiredsampling rate by means of a feedback circuit which comprises a digital filter (FD).