Content Replacement by PID Mapping

A content multiplexer which creates an ordered stream of packets with primary and substitute content, comprising:

• means for receiving input data representing main content;
• means for receiving input data representing substitution content, such substitution content being for replacement of at least a portion of the main content;
• a packet identifier (PID) mapper that assigns a primary PID to the main content and assigns a secondary PID to the substitution content;
• and
• means for multiplexing an even or odd number of packets with the secondary PID ahead of packets with the primary PID, where the primary packets are either ignored or processed by a receiving device depending upon whether the number of packets is even or odd.

A content multiplexer which creates an ordered stream of packets with primary and substitute content, comprising:

• a processor that receives input data representing main content;
• the processor further receiving input data representing substitution content, such substitution content being for replacement of at least a portion of the main content;
• a packet identifier (PID) mapper that assigns a primary PID to the main content and assigns a secondary PID to the substitution content;
• and
• a multiplexer that multiplexes an even or odd number of packets with the secondary PID ahead of packets with the primary PID, where the primary packets are either ignored or processed by a receiving device depending upon whether the number of packets is even or odd.