Granted Patent B2

US 8,811,457 · App. 13/460,273 · Granted Aug 19, 2014

Abstract

Claims (41)

1. A method comprising:

identifying a video reference frame from a series of video frames in a time division multiplexing (TDM) system;

encoding a difference between said video reference frame and a video non-reference frame;

placing said video reference frame at a beginning of a data burst;

identifying a duration of said data burst and a duty cycle of a device that places said video reference frame at the beginning of said data burst;

generating said video reference frame at a same duty cycle as that being generated by said device;

receiving said series of video frames and said data burst in a mobile TV receiver; and

said mobile TV receiver immediately locating said video reference frame upon receipt of said data burst.

2. The method of claim 1 , further comprising said mobile TV receiver decoding said series of video frames.

3. The method of claim 1 , wherein the placing process results in a substantially reduced channel switching delay in said mobile TV receiver.

4. The method of claim 1 , further comprising placing exactly one video reference frame at said beginning of said data burst.

5. The method of claim 1 , wherein said TDM system comprises a mobile TV system.

6. The method of claim 1 , wherein said device comprises an encapsulator.

7. A time division multiplexing (TDM) system comprising:

a video encoder that identifies a video reference frame from a series of video frames and encodes a difference between said video reference frame and a video non-reference frame;

a first encapsulator that places said video reference frame at a beginning of a data burst and feeds back to said video encoder a timing of a beginning of said data burst, wherein said video encoder identifies a duration of said data burst and a duty cycle of said first encapsulator, and wherein said video encoder generates said video reference frame at a same duty cycle as that being generated by said first encapsulator;

a video decoder that decodes the transmitted series of video frames; and

a second encapsulator that immediately locates said video reference frame upon receipt of said data burst.

8. The system of claim 7 , wherein placement of said video reference frame at said beginning of said data burst results in a substantially reduced channel switching delay.

9. The system of claim 7 , wherein said first encapsulator places exactly one video reference frame at said beginning of said data burst.

10. The system of claim 7 , wherein said first encapsulator provides timing of said beginning of said data burst to said video encoder.

11. The system of claim 7 , wherein said second encapsulator locates said video reference frame coming from said video decoder, and wherein said second encapsulator links said beginning of said data burst to a location of said video reference frame.

12. The system of claim 7 , further comprising a TV channel transmitter comprising said video encoder and said first encapsulator.

13. The system of claim 7 , further comprising a TV channel receiver comprising said video decoder and said second encapsulator.

14. The system of claim 13 , wherein said TV channel receiver comprises a mobile TV receiver.

15. A mobile TV receiver that receives video in a time division multiplexing (TDM) environment, said mobile TV receiver comprising:

a video encoder that identifies a video reference frame from a series of video frames and encodes a difference between said video reference frame and a video non-reference frame; and

an encapsulator that places said video reference frame at a beginning of a data burst and feeds back to said video encoder a timing of a beginning of said data burst, wherein said video encoder identifies a duration of said data burst and a duty cycle of said encapsulator, and wherein said video encoder generates said video reference frame at a same duty cycle as that being generated by said encapsulator,

wherein said mobile TV receiver receives said series of video frames and said data burst, and

wherein said mobile TV receiver immediately locates said video reference frame upon receipt of said data burst.

16. The receiver of claim 15 , wherein said mobile TV receiver further comprises a video decoder that decodes said series of video frames.

17. The receiver of claim 15 , wherein the placing of said video reference frame at said beginning of said data burst results in a substantially reduced channel switching delay in said mobile TV receiver.

18. The receiver of claim 15 , wherein said encapsulator places exactly one video reference frame at said beginning of said data burst.

19. The receiver of claim 15 , wherein said TDM environment comprises a mobile TV system.

20. A mobile TV receiver that receives video in a time division multiplexing (TDM) environment, said mobile TV receiver comprising:

a video encoder that identifies a video reference frame from a series of video frames and encodes a difference between said video reference frame and a video non-reference frame; and

an encapsulator that places said video reference frame at a beginning of a data burst and feeds back to said video encoder a timing of a beginning of said data burst, wherein said video encoder identifies a duration of said data burst and a duty cycle of said encapsulator, and wherein said video encoder generates said video reference frame at a same duty cycle as that being generated by said encapsulator,

wherein said mobile TV receiver receives said series of video frames and said data burst,

wherein said mobile TV receiver immediately locates said video reference frame upon receipt of said data burst,

wherein the placing of said video reference frame at said beginning of said data burst results in a substantially reduced channel switching delay in said mobile TV receiver, and

wherein said channel switching delay is reduced to zero when said receiver wakes up from a sleep mode of operation before receipt of said data burst.

Assignments (21)