Patent ID: 7904926

Claim:
A digital television (DTV) receiver for processing a DTV signal, the DTV receiver comprising: a receiving unit for receiving a digital television signal including a plurality of event extended text table (ETT) instances that appear in transport stream packets with common PID values, the event ETT instances having common table ID values, each event ETT instance comprising a section header and a message body, the section header containing a table identification (ID) extension field that serves to establish uniqueness of each event ETT instance, the message body containing an extended text message (ETM) which provides detailed descriptions of an event associated with each event ETT instance, wherein the header further contains a field indicating a version number of an event ETT-i which is incremented by 1 modulo 32 when any ETM in the event ETT-i changes; a demodulator for demodulating the digital television signal; and an identifying unit for identifying at least one pertinent event ETT instance from the plurality of event ETT instances.