Non-real time services
View Patent ↗In certain embodiments, a digital television broadcast method involves generating a digital television signal having one or more transport streams; where data in at least one of the one or more transport streams that supports non-real time (NRT) services, where such data comprises an Internet protocol (IP) stream of packets containing NRT content including a FLUTE file description table (FDT), a NRT information table (NRT-IT), and a Service Map Table (SMT); where the NRT-IT contains a content ID that relates the NRT-IT to the FLUTE FDT, and where the SMT contains a service ID that relates the SMT to the NRT-IT table; and outputting the one or more transport streams for broadcast as a digital television signal. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
1. A digital television broadcast method, comprising:
generating a digital television signal having one or more transport streams;
where data in at least one of the one or more transport streams supports Non-Real Time services, where such data comprises an Internet Protocol stream of packets containing Non-Real Time content including a FLUTE File Description Table, a Non-Real Time Information Table, and a Service Map Table;
where the Non-Real Time Information Table contains a Content Identifier that relates the Non-Real Time Information Table to the FLUTE File Description Table; and
outputting the one or more transport streams for broadcast as a digital television signal.
2. The method according to claim 1 , where the one or more transport streams further contains Non-Real Time metadata.
3. The method according to claim 1 , where Non-Real Time metadata is broadcast in a service signaling channel.
4. The method according to claim 1 , where Non-Real Time content description text is stored in a Text Fragment Table, Non-Real Time content metadata is stored in a Non-Real Time Information Table, where the transport stream further comprises a Virtual Channel Table, and where the Virtual Channel Table contains a service type code indicative of a virtual channel corresponding to Non-Real Time content.
5. The method according to claim 1 , where the Text Fragment Table contains Non-Real Time content description text.
6. The method according to claim 1 , where the Non-Real Time Information Table contains Non-Real Time content metadata.
7. The method according to claim 4 , where the Non-Real Time content metadata comprises an indication that the identified content may be retrieved from an Internet-based server, and a Uniform Reference Locator that may be used to effect said retrieval.
8. The method according to claim 1 , wherein the Non-Real Time Information Table includes a Playback Delay parameter that indicates an amount of time from the recovery of the first byte of a file containing the Non-Real Time content the receiver should wait prior to beginning playback of the content.
9. The method according to claim 1 , wherein the Non-Real Time Information Table includes a flag indicating whether or not the Non-Real Time file can be extracted from the broadcast stream with lower-latency or whether the receiver should prompt the user to return to view the Non-Real Time content at a later time due to longer latency, wherein lower and longer are measured with respect to one another.
10. The method according to claim 1 , wherein the Non-Real Time Information Table points to a table that points to a graphical icon representation of the Non-Real Time service or content item.
11. A digital television broadcast system, comprising:
a transmitter that generates a digital television broadcast signal having one or more transport streams;
where the data in at least one of the one or more transport streams supports Non-Real Time services by incorporating:
an Internet Protocol stream of packets containing Non-Real Time content including a FLUTE File Description Table,
a Non-Real Time Information Table, and
a Service Map Table; and
where the Non-Real Time Information Table contains a Content Identifier that relates the Non-Real Time Information Table to the FLUTE File Description Table.
12. The broadcast system according to claim 11 , where the one or more transport streams further contains Non-Real Time metadata.
13. The broadcast system according to claim 11 , where Non-Real Time metadata is broadcast in a service signaling channel.
14. The broadcast system according to claim 13 , where Non-Real Time content metadata is stored in a Non-Real Time Information Table, and wherein the transport stream further comprises a Virtual Channel Table, and wherein the Virtual Channel Table contains a service type code indicative of a virtual channel corresponding to Non-Real Time content.
15. The broadcast system according to claim 11 , where the Non-Real Time Information Table contains Non-Real Time content metadata.
16. The broadcast system according to claim 15 , where the Non-Real Time content metadata comprises an indication that the identified content may be retrieved from an Internet-based server, and a Uniform Reference Locator that may be used to effect said retrieval.
17. The broadcast system according to claim 11 , wherein the Non-Real Time Information Table includes a Playback Delay parameter that indicates an amount of time from the recovery of the first byte of a file containing the Non-Real Time content the receiver should wait prior to beginning playback of the content.
18. The broadcast system according to claim 11 , wherein the Non-Real Time Information Table includes a flag indicating whether or not the Non-Real Time content can be extracted from the broadcast stream with lower-latency or whether the receiver should prompt the user to return to view the Non-Real Time content at a later time due to longer latency, wherein lower and longer are measured with respect to one another.
19. The broadcast system according to claim 11 , wherein the Non-Real Time Information Table points to a table that points to a graphical icon representation of the Non-Real Time service or content item.
20. A digital television broadcast system, comprising:
a transmitter that generates a digital television broadcast signal having one or more transport streams;
where the data in at least one of the one or more transport streams supports Non-Real Time services by incorporating:
an Internet Protocol stream of packets containing Non-Real Time content including a FLUTE File Description Table,
a Non-Real Time Information Table, and
a Service Map Table;
where the Non-Real Time Information Table contains a Content Identifier that relates the Non-Real Time Information Table to the FLUTE File Description Table, and where the Service Map Table contains a service ID that relates the Service Map Table to the Non-Real Time Information Table;
where the one or more transport streams contains an Internet Protocol stream of packets containing Non-Real Time content, the FLUTE File Description Table and Non-Real Time metadata;
where the Non-Real Time metadata is broadcast in a service signaling channel as a part of the Service Map Table;
where Non-Real Time content description text is stored in a Text Fragment Table, Non-Real Time content metadata is stored in the Non-Real Time Information Table, and the transport stream further comprises a Virtual Channel Table, where the Virtual Channel Table contains a service type code indicative of a virtual channel corresponding to Non-Real Time content;
where the Non-Real Time Information Table includes entries in a Text Fragment Table and where the Non-Real Time Information Table includes a Playback Delay parameter that indicates an amount of time from the recovery of the first byte of a file containing the Non-Real Time content the receiver should wait prior to beginning playback of the content; and
where the Non-Real Time Information Table points to a table that points to a graphical icon representation of the Non-Real Time service or content item.