Just wanted to update that I can now hear the speech voices in movies by changing hts settings. I mentioned earlier that speech voices are too low in this hts. There is a setting by which you can adjust volume output of each speaker. I increased center speaker vol to full, reduced output of front L& R, Increased vol of rear surround speakers. After doing this I got satisfactory performance in movies. I no longer need to turn on tv sound for most of the movies. I knew this option earlier but did not changed each speaker output and only increased center output. But front L & R volume was so loud that it used to suppress others. So now I experienced what 5.1 sounds like & its really impressive
Like wind cutting noise by bullets, crowd speech in background, explosions etc.
there are still some movies whose speech voice is too low for proper hearing like ninja assassins. Other than this, everything is ok now.