Trip-Hop Music style has its clear limits. Trip-hop is based on the break parties like the party used in the styles of Hip-hop, at Bass borrowed from Dub (Reggy) and depressed vocals.  Trip-Hop is music genre also known as Bristol Sound. Homeland  of Trip-Hop is considered to be Bristol (United Kingdom).

Most popular Trip-Hop style founders are bands and people like : Massive Attack, Tricky, Portishead. 

Often music close to Trip-Hop is called Experimental Trip-hop and sometimes with elements of dance, but the notion of Trip-Hop recently become more widespread and similar styles with Down Tempo, Acid Jazz.  In some instances, the trip hop sound relies on jazz samples, usually taken from old jazz records. This reliance on sampling has changed the way record labels deal with clearing samples for use in other people's tracks. Later artists have taken inspiration from many other sources including world and orchestral influences as well as film scores