Anticipatory program map table information acquisition
Methods, systems, and computer readable media can be operable to facilitate the anticipatory acquisition of PMT information. A device may recognize a trigger within a transport stream, wherein the trigger indicates an audio/video transition and initiates a PMT acquisition by the device. Upon acquisition of the PMT, the device may process information carried by the transport stream after the audio/video transition. In embodiments, a device may acquire a PMT having information associated with a planned audio/video transition, wherein the information includes a time reference for when the audio/video transition will occur and information that may be used by the device to process information carried by the transport stream after the audio/video transition.
1. A method comprising:
receiving multimedia associated with a first piece of content through a first stream;
identifying a trigger within the first stream, wherein the trigger signals the initiation of a program map table acquisition, wherein the trigger comprises a program clock reference discontinuity flag;
in response to identifying the trigger within the first stream, acquiring a program map table from the first stream, wherein the program map table comprises information associated with a scheduled multimedia transition, wherein the information associated with the scheduled multimedia transition comprises program information associated with a second piece of content that is to be acquired after the scheduled multimedia transition, and wherein the information associated with the scheduled multimedia transition comprises information to be utilized in identifying and decoding audio and video associated with the second piece of content, wherein the information associated with the scheduled multimedia transition comprises a reference identifying a time at which the scheduled multimedia transition will occur, and wherein the program map table is acquired from the first stream before the scheduled multimedia transition occurs;
storing the information associated with the scheduled multimedia transition;
after acquiring the program map table from the first stream, identifying the scheduled multimedia transition, wherein the scheduled multimedia transition comprises a targeted advertisement switch, and wherein a second stream carrying the second piece of content is received after the identification of the scheduled multimedia transition; and
in response to identifying the scheduled multimedia transition, retrieving the stored information associated with the scheduled multimedia transition and identifying and decoding the audio and video associated with the second piece of content using the information associated with the scheduled multimedia transition, wherein the audio and video associated with the second piece of content is identified and decoded from the second stream, and wherein the second stream and the first stream are different streams.
2. The method of claim 1 , wherein the program map table is acquired before an associated program map table polling period expires.
3. The method of claim 1 , wherein the trigger is identified from an elementary stream within the first stream.
4. An apparatus comprising:
an interface configured to be used to receive multimedia associated with a first piece of content through a first stream; and
a module stored in memory and executed by a processor, wherein the module is configured to:
identify a trigger within the first stream, wherein the trigger signals the initiation of a program map table acquisition, wherein the trigger comprises a program clock reference discontinuity flag;
in response to identifying the trigger within the first stream, acquire a program map table from the first stream, wherein the program map table comprises information associated with a scheduled multimedia transition, wherein the information associated with the scheduled multimedia transition comprises program information associated with a second piece of content that is to be acquired after the scheduled multimedia transition, and wherein the information associated with the scheduled multimedia transition comprises information to be utilized in identifying and decoding audio and video associated with the second piece of content, wherein the information associated with the scheduled multimedia transition comprises a reference identifying a time at which the scheduled multimedia transition will occur, and wherein the program map table is acquired from the first stream before the scheduled multimedia transition occurs;
store the information associated with the scheduled multimedia transition;
identify the scheduled multimedia transition after acquiring the program map table from the first stream, wherein the scheduled multimedia transition comprises a targeted advertisement switch, wherein a second stream carrying the second piece of content is received after the identification of the scheduled multimedia transition; and
in response to identifying the scheduled multimedia transition, retrieve the stored information associated with the scheduled multimedia transition and identify and decode the audio and video associated with the second piece of content using the information associated with the scheduled multimedia transition, wherein the audio and video associated with the second piece of content is identified and decoded from the second stream, and wherein the second stream and the first stream are different streams.
5. One or more non-transitory computer readable media having instructions operable to cause one or more processors to perform the operations comprising:
receiving multimedia associated with a first piece of content through a first stream;
identifying a trigger within the first stream, wherein the trigger signals the initiation of a program map table acquisition, wherein the trigger comprises a program clock reference discontinuity flag;
in response to identifying the trigger within the first stream, acquiring a program map table from the first stream, wherein the program map table comprises information associated with a scheduled multimedia transition, wherein the information associated with the scheduled multimedia transition comprises program information associated with a second piece of content that is to be acquired after the scheduled multimedia transition, and wherein the information associated with the scheduled multimedia transition comprises information to be utilized in identifying and decoding audio and video associated with the second piece of content, wherein the information associated with the scheduled multimedia transition comprises a reference identifying a time at which the scheduled multimedia transition will occur, and wherein the program map table is acquired from the first stream before the scheduled multimedia transition occurs;
storing the information associated with the scheduled multimedia transition;
after acquiring the program map table from the first stream, identifying the scheduled multimedia transition, wherein the scheduled multimedia transition comprises a targeted advertisement switch, wherein a second stream carrying the second piece of content is received after the identification of the scheduled multimedia transition; and
in response to identifying the scheduled multimedia transition, retrieving the stored information associated with the scheduled multimedia transition and identifying and decoding the audio and video associated with the second piece of content using the information associated with the scheduled multimedia transition, wherein the audio and video associated with the second piece of content is identified and decoded from the second stream, and wherein the second stream and the first stream are different streams.
6. The one or more non-transitory computer-readable media of claim 5 , wherein the program map table is acquired before an associated program map table polling period expires.
7. The one or more non-transitory computer-readable media of claim 5 , wherein the trigger is identified from an elementary stream within the first stream.