Method and apparatus for multiplexing and demultiplexing video data to identify reproducing state of video data

Abstract

A method and apparatus for multiplexing and de-multiplexing video data. The method of multiplexing the video data involves syntax to a header of transmission unit data that is used to multiplex a clean random access (CRA) picture used in a random access, wherein the predetermined syntax indicates a reproduction status of the CRA picture, i.e., normal reproduction or reproduction according to a random access.

What is claimed is: 
     
         1 . An apparatus for decoding a video, the apparatus comprising:
 an inverse-multiplexer for receiving transmission unit data containing a header, obtaining, from the header, type information that indicates a type of a current picture contained in the transmission unit data, and identifying whether the current picture is a CRA (Clean Random Access) picture for a random access based on the type information; and   a decoding unit for decoding the identified CRA picture.   
     
     
         2 . The apparatus of  claim 1 ,
 wherein the identified CRA picture is split into a plurality of maximum coding units,   wherein one of the plurality of maximum coding units is split into a plurality of coding units by using split information parsed from a bitstream, and   wherein the identified CRA picture is decoded based on the plurality of coding units.   
     
     
         3 . The apparatus of  claim 1 ,
 wherein the transmission unit data is NAL (Network Abstraction Layer) unit data that is transmission unit data in a Network Abstraction Layer, and   wherein the type information is NAL unit type information that indicates the type of the current picture contained in the transmission unit data.