SUPPORT FOR BLOCKING TRICK MODE OPERATIONS
In one embodiment, a method that provides information corresponding to information that assists a receiver provide trick mode operations, such information provided with a corresponding picture, and such information provided in the transport packet containing the start of the corresponding picture, and such information including a tier number corresponding to the picture that conveys picture interdependencies.
1 . A method, comprising:
receiving an encoded video stream with a first picture, a first data field, and a second data field with a first value, wherein the first and second data fields correspond to the first picture, and where the first data field corresponds to a tier number corresponding to the first picture; and wherein the second data field corresponds to a flag that signals the blocking of a trick mode; and
associating the first value of the second data field to blocking of a trick mode; and associating the blocking of the trick mode to be effective until a subsequent picture in the video stream, said subsequent picture associated with a random access point of the video stream.
2 . The method of claim 1 , wherein the first picture in the video is associated with a random access point.
3 . The method of claim 1 , further comprising of receiving a third data field, wherein the third information corresponds to signaling the presence of information corresponding to the presentation of the picture.
4 . The method of claim 1 , further comprising of receiving a fourth data field, wherein the fourth information corresponds to signaling the presence of information corresponding to the location in the video stream of a subsequent picture having the same tier number as the first picture.
5 . The method of claim 1 , further comprising of receiving a fifth data field, wherein the fifth information corresponds to signaling the presence of information corresponding to the number of extractable pictures per second in the video stream for a trick mode.
6 . The method of claim 1 , wherein the number of extractable pictures correspond at least one tier number starting with the lowest tier number.
7 . A method, comprising:
receiving a first information corresponding to a picture in a video stream, the first information including a tier number, wherein the first information is received outside of the payload portion of a transport packet, the transport packet comprising a first byte of a header of a packetized elementary stream (PES) containing the picture;
receiving the first picture;
receiving at least a portion of the video stream; and
providing portions of the at least received portion of the video stream in a trick mode.
8 . The method of claim 7 , wherein the video stream corresponds to an AVC compressed video stream.
9 . The method of claim 7 , wherein the provide portions of the AVC video stream in the trick mode corresponds to a sub-sequence of pictures that is not a compliant AVC video stream.
10 . The method of claim 7 , wherein the first information further includes a second data field corresponding to blocking of a trick mode.
11 . A system, comprising:
a processor configured to provide plural data fields in a first portion of a transport packet contained in a video stream, the plural data fields further comprising:
a first information configured to signal a tier number corresponding to a picture, wherein the value of the tier number is according to a dependency of the picture on other pictures in the video stream; and
a second information configured to signal the presence of information corresponding to blocking of a trick mode.
12 . The system of claim 11 , wherein the first portion of the transport packet corresponds to a portion of the transport packet corresponding to an adaptation field.
13 . The system of claim 12 , wherein the transport packet corresponds to an MPEG-2 transport packet.
14 . The system of claim 11 , wherein the plural data fields further comprises a third information configured to signal an identification of a subsequent picture corresponding to a same tier number as the tier number of the picture.
15 . The system of claim 11 , wherein the second information corresponds to a one bit field.
16 . The system of claim 11 , wherein a first value of the second information signals the blocking of a trick mode, and wherein the picture corresponds to the picture associated with a random access point of the video stream.
17 . The system of claim 16 , wherein the first value of the second information signals the blocking of the trick mode to be effective until a subsequent picture in the video stream, said subsequent picture associated with a random access point of the video stream.
18 . The system of claim 11 , wherein the tier number corresponding to the picture is larger than or equal to all of the respective tier numbers corresponding to the pictures that the picture depends on.
19 . The system of claim 11 , wherein the tier number corresponding to the picture is larger than or equal to the tier number corresponding to a picture issuing a memory management control operation that affects picture referencing by the picture.
20 . The system of claim 11 , wherein the plural data fields further comprise of a third information configured to signal the presence of information corresponding to the presentation of the picture.