I am searching for such a chip which has a usb input to connect a pen drive to it. The chip should have a HDMI output (or any other suitable output) to display on a LCD tv. For example, I have a movie stored in a pen drive which is connected to the chip and that chip's output is given to the LCD tv. On start up the chip should start playing the movie automatically on the tv. Please give me solutions for this requirement like name of such a chip, where can i get it, etc.
A "chip" that does this with no other support is unlikely to be available. But, ...
There are a number of small, moderately low cost, self contained single-board or modular computers that do this with ease. One example is the $US25 "Raspberry Pi". This could meet your need with the Raspberry Pi itself, a programmed SD card, a 5V power supply (could be via USB cable or battery or other, and a video output cable.
Larger than life photo (probably). Actual size is about the same as a credit card. (Photo from Wikipedia).
Element 14 purchase point - people have received RPs.