Methods for providing conditional access information to decoders in a packet ...

FIG. 7A

GENERATE ECMs FOR EACH
ENCRYPTED/SCRAMBLED
ELEMENTARY STREAM

INSERT THE ECMs FOR EACH
ELEMENTARY STREAM INTO A
RESPECTIVE SEQUENCE OF
TRANSPORT PACKETS

I

FOR EACH ELEMENTARY STREAM,
ASSIGN A UNIQUE PACKET-ID (PID)
TO EACH TRANSPORT PACKET IN THE
SEQUENCE THAT CARRIES THE ECMs
FOR THAT ELEMENTARY STREAM

i ~

GENERATE A FIRST TABLE THAT
SPECIFIES, FOR EACH ELEMENTARY
STREAM, THE PID VALUE OF THE
TRANSPORT PACKETS THAT CARRY
THE ECMs FOR THAT
ELEMENTARY STREAM

TRANSMIT THE FIRST TABLE
TO A DECODER ALONG WITH
THE TRANSPORT PACKETS THAT
CONTAIN THE ECMs FOR EACH
ELEMENTARY STREAM

FIG. 7B

GENERATE SEPARATE EMM STREAMS
FOR EACH DIFFERENT CONDITIONAL
ACCESS SYSTEM EMPLOYED BY THE
DECODERS IN THE COMMUNICATIONS
SYSTEM

I

INSERT EACH EMM STREAM
INTO THE PAYLOAD SECTIONS OF
A RESPECTIVE SEQUENCE OF
TRANSPORT PACKETS

ASSIGN A UNIQUE PID TO EACH
EMM STREAM, AND FOR EACH
STREAM, INSERT THE ASSIGNED
PID IN THE HEADER OF EACH
TRANSPORT PACKET THAT CARRIES
A PORTION OF THAT EMM STREAM

I

GENERATE A SECOND TABLE THAT
SPECIFIES, FOR EACH CONDITIONAL
ACCESS SYSTEM PRESENT IN THE
COMMUNICATIONS SYSTEM, THE PID
VALUE OF THE TRANSPORT PACKETS
THAT CARRY THE EMM STREAM
ASSOCIATED WITH THAT CONDITIONAL
ACCESS SYSTEM

I

TRANSMIT THE SECOND TABLE TO
A DECODER ALONG WITH THE
TRANSPORT PACKETS THAT CONTAIN
THE EMM STREAMS FOR EACH OF
THE DIFFERENT CONDITIONAL
ACCESS STREAMS