Patent ID: 8406312

Claim:
A broadcasting processing apparatus, comprising: a receiver which receives an image signal; a storage unit; a decoder which decodes the image signal; a channel selection unit which is provided to select a channel; and a controller which determines whether sequence header information exists in the image signal received through the receiver and stores the sequence header information in the storage unit if the sequence header information exists in the image signal, and controls the decoder to decode the image signal by using sequence header information of the selected channel prestored in the storage unit if the sequence header information does not exist, if a selection signal to select the channel is inputted through the channel selection unit; wherein the controller determines whether group of pictures (GOP) header information exists if the supplied image signal does not comprise the sequence header information, and controls the decoder to decode the image signal by using the stored sequence header information if the GOP header information exists; wherein the controller determines validity of the sequence header information prestored in the storage unit and decodes the image signal if it is determined that the sequence header information is valid; and wherein the image signal comprises an intra I picture, a prediction P picture and a bi-direction B picture, and the controller decodes the I picture by using the prestored sequence header information, and determines whether a number of image blocks from the decoded I picture corresponds to a preset number.