Patent ID: 7869522
Filing Date: 2011-01-11
Classification: H04N

Abstract:
1. A video signal multiplexing apparatus for receiving a video signal containing picture information and additional information, encoding the picture information in the video signal and then multiplexing the encoded picture information with the additional information, the video signal multiplexing apparatus comprising: a separator which receives the video signal to separate the picture information and the additional information contained in the video signal; an encoder which encodes the separated picture information; a controller adjusting, when the picture information is out of sync with the additional information, an amount of data of the additional information stored in the additional information storage based on an amount of data of the picture information in such a manner that the picture information is in sync with the additional information; and a multiplexer which multiplexes the encoded data generated with the encoder and the adjusted additional information, wherein the controller deletes a predetermined amount of frames from the additional information when a number of frames of the additional information is greater than a number of frames of the picture information with a difference greater than a predetermined value, and the controller deletes only null data in the additional information when the number of frames of the additional information is greater than the number of frames of the picture information with a difference not greater than the predetermined value.