FIELD: radio engineering, communication.
SUBSTANCE: invention relates to an apparatus and methods to enable fast channel switching with limited digital video broadcasting (DVB) receiver memory. The method comprises selecting a real time audio/visual (A/V) stream n from a plurality of real time A/V streams from a channel line-up presented in an electronic service guide (ESG); demultiplexing a plurality of elementary streams (ES) in a plurality of non-consecutive packet signals to obtain real time A/V streams (n-1), n and (n+1) from the plurality of real time A/V streams, wherein the real time A/V streams (n-1), n and (n+1) are consecutive in the channel line-up; decoding the real time A/V stream n to obtain decoded data; and discarding the real time A/V streams (n-1) and (n+1) in the time period between a first non-consecutive packet signal and second non-consecutive packet signal.
EFFECT: optimising channel switching time in a receiver and saving receiver memory.
15 cl, 11 dwg
