Non-real time services
View Patent ↗In certain embodiments, a method of receiving digital television signals involves tuning a radio frequency tuner to receive a radio frequency modulated channel containing a transport stream; demodulating the channel to produce an output transport stream; the output transport stream containing an Internet Protocol (IP) stream of packets containing non-real time content, a FLUTE file description table (FDT), NRT service metadata and NRT content metadata; demultiplexing the IP stream of packets to produce: NRT content that is stored in an electronic storage medium, the FLUTE FDT, NRT service metadata, and NRT content metadata; parsing the metadata to produces NRT service metadata; NRT content description text and NRT content metadata; and processing the NRT content description text derived from a Text Fragment Table (TFT). This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
1. A digital television receiver that receives non-real time (NRT) content, comprising in combination:
a radio frequency tuner that receives a radio frequency modulated channel containing a transport stream and demodulates the channel to produce an output transport stream;
the output transport stream containing an Internet Protocol (IP) stream of packets containing non-real time content, a FLUTE file description table (FDT), NRT service metadata and NRT content metadata;
an electronic storage medium;
a demultiplexer that demultiplexes the IP stream of packets to produce:
NRT content that is stored in the electronic storage medium,
the FLUTE FDT,
NRT service metadata, and
NRT content metadata;
an NRT metadata parser that produces NRT service metadata; NRT content description text and NRT content metadata; and
where the NRT metadata parser further processes NRT content description text derived from a Text Fragment Table (TFT), and where the Text Fragment Table has a linkage element that references entries in a Non-Real-Time Information Table (NRT-IT).
2. The digital television receiver according to claim 1 , wherein the NRT content description text is received in the Text Fragment Table (TFT).
3. A digital television receiver that receives non-real time (NRT) content, comprising in combination:
an Internet protocol (IP) receiver that receives a stream of IP packets and selects an IP subnet containing a packet stream selected as an output packet stream;
the output packet stream containing non-real time content, NRT service metadata and NRT content metadata;
an electronic storage medium;
a demultiplexer that demultiplexes the IP packet stream to produce:
NRT content that is stored in the electronic storage medium,
NRT service metadata, and
NRT content metadata;
an NRT metadata parser that produces NRT service metadata and NRT content metadata; and
where the NRT metadata parser further processes NRT content description text derived from a Text Fragment Table (TFT), and where the Text Fragment Table has a linkage element that references entries in a Non-Real-Time Information Table (NRT-IT).
4. The digital television receiver according to claim 3 , wherein the NRT content description text is received in the Text Fragment Table (TFT).
5. The digital television receiver according to claim 3 wherein the output transport stream further comprises a virtual channel table (VCT), and wherein the VCT contains a service type code indicative of a virtual channel corresponding to NRT content.
6. The digital television receiver according to claim 3 , wherein the NRT content description text is received in a Text Fragment Table (TFT), and wherein the output transport stream further comprises a virtual channel table (VCT), and wherein the VCT contains a service type code indicative of a virtual channel corresponding to NRT content.
7. A digital television receiver that receives non-real time (NRT) content, comprising in combination:
a receiver device that receives a signal and produces an output transport stream, the output transport stream containing an Internet Protocol (IP) stream of packets containing non-real time content, NRT service and NRT content metadata;
an electronic storage medium;
a demultiplexer that demultiplexes the IP stream of packets to produce:
NRT content that is stored in the electronic storage medium,
NRT service metadata, and
NRT content metadata;
an NRT metadata parser that produces NRT service metadata; NRT content description text and NRT content metadata, and
wherein the NRT content description text is received within a Text Fragment Table (TFT), and where the Text Fragment Table has a linkage element that references entries in a Non-Real-Time Information Table (NRT-IT).
8. A method of receiving digital television signals, comprising
tuning a radio frequency tuner to receive a radio frequency modulated channel containing a transport stream;
demodulating the channel to produce an output transport stream;
the output transport stream containing an Internet Protocol (IP) stream of packets containing non-real time content, a FLUTE file description table (FDT), NRT service metadata and NRT content metadata;
demultiplexing the IP stream of packets to produce:
NRT content that is stored in an electronic storage medium,
the FLUTE FDT,
NRT service metadata, and
NRT content metadata;
parsing the metadata to produces NRT service metadata; NRT content description text and NRT content metadata; and
processing the NRT content description text derived from a Text Fragment Table (TFT), and where the Text Fragment Table has a linkage element that references entries in a Non-Real-Time Information Table (NRT-IT).
9. The method according to claim 8 , wherein the NRT content description text is received in the Text Fragment Table (TFT).