Do TV advertisers use some hidden communication so as to influence our subconcious mind in buying their products?

yes,definately. Tv advertisings are always made in such a way that it could penetrate your subconcious mind direclty. For the information let i tell you Subconcious is the one and only thing to make you able to do any kind of work all you have to do to keep yourself in to repetiotion mode about that particular stuffs.This exactly happens in the case of advertisement too.What happens here,when you see something, it attracts you emotionaly and mentaly.You might have noticed their is a sentiment reflects through that advertisement. so basically when you go through these kind of things it comes in to your emotion even you are not interested in.These kind of senses keep revolving somewhere in your mind.it’s another fact that you can’t notice because of you keep youself busy in something else.BUt as you get free this emotion,this sense get errupt and take a pictorial form to make you think or review them what you earlier saw on tv. And you finally manage to go there and find that you are on the verge of taking decision to opt or buy that product.It’s all about  projecting their product upon you through emotion you can say.A number of such tv ads are here.Recent dish tv ads i am not sure about that (A song ‘Beh chla” has been playing ) is a perfact example. Fevi quick (Hindustan pakistan retreat ceromany based ad) ,etc . If you see all these you automaticaly generate a sense of purchase or buy. so yes they have a great hidden communication.