Apparatus, systems, methods and computer program products for producing a single frequency network for ATSC mobile / handheld services
First Claim
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1. A method for performing data frame synchronization, comprising the steps of:
- replacing a predetermined number of bytes to be transmitted onto a studio-transmitter link with a plurality of bytes containing signalling information;
transmitting the predetermined number of bytes in a transport stream over the studio-to transmitter link;
assigning a packet identifier to a predetermined number of transport stream packets, the packet identifier being unknown to a post processor on the studio-transmitter link;
calculating a first checksum on the plurality of bytes containing the signalling information; and
transmitting the first checksum onto the studio-transmitter link to the post-processor.
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Abstract
Producing coherent symbols from a plurality of digital RF transmitters is achieved by selecting data bytes corresponding to mobile-handheld encapsulation (MHE) packets and setting trellis coders to a predetermined state when a predetermined number of bits of the data bytes enter a corresponding trellis coder.
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Citations
18 Claims
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1. A method for performing data frame synchronization, comprising the steps of:
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replacing a predetermined number of bytes to be transmitted onto a studio-transmitter link with a plurality of bytes containing signalling information; transmitting the predetermined number of bytes in a transport stream over the studio-to transmitter link; assigning a packet identifier to a predetermined number of transport stream packets, the packet identifier being unknown to a post processor on the studio-transmitter link; calculating a first checksum on the plurality of bytes containing the signalling information; and transmitting the first checksum onto the studio-transmitter link to the post-processor. - View Dependent Claims (2, 3, 4)
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5. A method for performing data frame synchronization, comprising the steps of:
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replacing a predetermined number of bytes to be transmitted onto a studio-transmitter link with a plurality of bytes containing signalling information; transmitting the predetermined number of bytes in a transport stream over the studio-to transmitter link; assigning a packet identifier to a predetermined number of transport stream packets, the packet identifier being prestored in a memory of a post processor on the studio-transmitter link; calculating a first checksum on the plurality of bytes containing the signalling information; and transmitting the first checksum onto the studio-transmitter link to the post-processor. - View Dependent Claims (6)
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7. A system for performing data frame synchronization, comprising:
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a group formatter operable to replace a predetermined number of bytes to be transmitted onto a studio-transmitter link with a plurality of bytes containing signalling information; a packet transmitter operable to transmit the predetermined number of bytes in a transport stream over the studio-to transmitter link; a multiplexer operable to assigning a packet identifier to a predetermined number of transport stream packets, the packet identifier being unknown to a post processor on the studio-transmitter link; a checksum calculator operable to calculate a first checksum on the plurality of bytes containing the signalling information; and the packet transmitter further operable to transmit the first checksum onto the studio-transmitter link to the post-processor. - View Dependent Claims (8, 9, 10)
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11. A system for performing data frame synchronization, comprising:
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a group formatter operable to replace a predetermined number of bytes to be transmitted onto a studio-transmitter link with a plurality of bytes containing signalling information; a packet transmitter operable to transmit the predetermined number of bytes in a transport stream over the studio-to transmitter link; a multiplexer operable to assign a packet identifier to a predetermined number of transport stream packets, the packet identifier being prestored in a memory of a post processor on the studio-transmitter link; a checksum calculator operable to calculate a first checksum on the plurality of bytes containing the signalling information; and the packet transmitter further operable to transmitting the first checksum onto the studio-transmitter link to the post-processor. - View Dependent Claims (12)
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13. A non-transitory computer-readable medium having stored thereon sequences of instructions, the sequences of instructions including instructions which when executed by a computer system causes the computer system to perform:
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replacing a predetermined number of bytes to be transmitted onto a studio-transmitter link with a plurality of bytes containing signalling information; transmitting the predetermined number of bytes in a transport stream over the studio-to transmitter link; assigning a packet identifier to a predetermined number of transport stream packets, the packet identifier being unknown to a post processor on the studio-transmitter link; calculating a first checksum on the plurality of bytes containing the signalling information; and transmitting the first checksum onto the studio-transmitter link to the post-processor. - View Dependent Claims (14, 15, 16)
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17. The non-transitory computer-readable medium having stored thereon a sequence of instructions which when executed by the computer system causes the computer system to perform:
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replacing a predetermined number of bytes to be transmitted onto a studio-transmitter link with a plurality of bytes containing signalling information; transmitting the predetermined number of bytes in a transport stream over the studio-to transmitter link; assigning a packet identifier to a predetermined number of transport stream packets, the packet identifier being prestored in a memory of a post processor on the studio-transmitter link; calculating a first checksum on the plurality of bytes containing the signalling information; and transmitting the first checksum onto the studio-transmitter link to the post-processor. - View Dependent Claims (18)
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Specification