Apparatus, systems and methods for providing enhancements to ATSC networks using synchronous vestigial sideband (VSB) frame slicing
Systems, methods, apparatus and computer program products are provided for signaling to a receiver an availability of a service and a deterministic mapping of a service content corresponding to the service. A modulator receives a digital signal and generates a data frame from the digital signal, where the data frame is divided into segments, where at least one grouping of the segments contains the service content. The modulator modulates at least one grouping in accordance with the deterministic mapping. A receiving device receives a digital signal containing the availability of a service, the deterministic mapping corresponding to the service, and the service content, and performs an operation on the service content in accordance with the deterministic mapping.
1. A method for modulating, comprising the steps of:
receiving a digital signal from a transport stream;
generating a data frame from the digital signal, wherein the data frame is divided into a predetermined number of segments, wherein at least one grouping of the predetermined number of segments contains a service content; and
modulating the at least one grouping in accordance with a deterministic mapping into a physical layer by inserting an initialization packet containing a plurality of stuff bytes positioned in predetermined byte positions into the digital signal, respectively, for setting each one of a plurality of Trellis coders to a predetermined state as a corresponding stuff byte enters,
wherein the service content is recognized at known symbol locations within the physical layer based on the deterministic mapping.
2. The method according to claim 1 , wherein at least one grouping contains a normal broadcast content.
3. A modulator, comprising:
a receiver operable to receive a digital signal from a transport stream;
a data frame generator operable to generate a data frame from the digital signal, wherein the data frame is divided into a predetermined number of segments, wherein at least one grouping of the predetermined number of segments contains a service content; and
a modulation unit operable to modulate the at least one grouping in accordance with a deterministic mapping into a physical layer by inserting an initialization packet containing a plurality of stuff bytes positioned in predetermined byte positions into the digital signal, respectively, for setting each one of a plurality of Trellis coders to a predetermined state as a corresponding stuff byte enters,
wherein the service content is recognized at known symbol locations within the physical layer based on the deterministic mapping.
4. The modulator of claim 3 , wherein at least one grouping contains a normal broadcast content.
5. A modulator, comprising:
means for receiving a digital signal from a transport stream;
means for generating a data frame from the digital signal, wherein the data frame is divided into a predetermined number of segments, wherein at least one grouping of the predetermined number of segments contains a service content; and
means for modulating the at least one grouping in accordance with a deterministic mapping into a physical layer by inserting an initialization packet containing a plurality of stuff bytes positioned in predetermined byte positions into the digital signal, respectively, for setting each one of a plurality of Trellis coders to a predetermined state as a corresponding stuff byte enters,
wherein the service content is recognized at known symbol locations within the physical layer based on the deterministic mapping.
6. A non-transitory computer-readable medium having control logic stored therein for modulating, which when executed by a computer, causes the computer to:
receive a digital signal from a transport stream;
generate a data frame from the digital signal, wherein the data frame is divided into a predetermined number of segments, wherein at least one grouping of the predetermined number of segments contains a service content; and
modulate the at least one grouping in accordance with a deterministic mapping into a physical layer by inserting an initialization packet containing a plurality of stuff bytes positioned in predetermined byte positions into the digital signal, respectively, for setting each one of a plurality of Trellis coders to a predetermined state as a corresponding stuff byte enters,
wherein the service content is recognized at known symbol locations within the physical layer based on the deterministic mapping.
7. The non-transitory computer-readable medium of claim 6 , wherein at least one grouping contains a normal broadcast content.