Patent ID: 6556252
Filing Date: 2003-04-29
Classification: H04N

Abstract:
A device for processing a sub-picture in a TV receiver, comprising:an input signal processor which receives and processes an input data including a main picture data and a sub-picture data, said input signal processor generating main picture synchronizing signals and sub-picture synchronizing signals; a picture-in-picture (PIP) synchronizing generator which receives the main picture synchronizing signals and generates PIP synchronizing signals; a read timing generator which generates a read signal using the PIP picture synchronizing signals; a write timing generator which generates a write signal using the sub-picture synchronizing signals and the PIP synchronizing signals; a sub-sampler which selects and sub-samples a portion of the sub-picture data to be displayed according to the write signal; a sub-picture frame memory which stores a sub-sampled sub-picture data and presents the stored sub-picture data according to the read signal; and a multiplexer which multiplexes a decoded main picture data from the input signal processor and the sub-picture data read from the sub-picture frame memory, and outputs the multiplexed data for display.