Film grain SEI message insertion for bit-accurate simulation in a video system

1. A method for use with a video signal receiving device for simulating film grain in an ordered sequence, comprising the steps of:

receiving at the video signal receiving device film grain supplemental information corresponding to a plurality of intra coded pictures; and

receiving at the video signal receiving device additional film grain supplemental information corresponding to inter coded pictures between consecutive intra coded pictures, in decode order, said inter coded pictures selected based upon display order.

2. The method of claim 1 , wherein the display order of the inter coded pictures is determined based on a picture order count (POC) value.

3. The method of claim 1 , wherein the POC value is a smallest POC value.

4. The method of claim 1 , wherein the film grain supplemental information and the additional film grain supplemental information is included in film grain supplemental enhancement information (SEI) messages.

5. The method of claim 4 , wherein only one of the film grain SEI messages corresponds to a particular inter coded picture with a smallest POC value.

6. The method of claim 5 , wherein the only one of the film grain SEI messages corresponding to the particular inter coded picture is the same as the film grain SEI message of an intra coded picture that precedes the particular inter coded picture, in decode order.

7. The method of claim 1 , wherein the simulating of film grain is bit accurate.

8. The method of claim 7 , wherein the simulating of film grain is bit accurate regardless of a play mode used.

9. The method of claim 8 , wherein the play mode used is normal mode.

10. The method of claim 8 , wherein the play mode used is trick mode.

11. The method of claim 1 , wherein the ordered sequence is the display order.

12. An apparatus for providing film grain information to enable simulation of film grain in an ordered sequence, comprising:

means for providing film grain supplemental information corresponding to a plurality of intra coded pictures; and

means for providing additional film grain supplemental information corresponding to inter coded pictures between consecutive intra coded pictures, in decode order, said inter coded pictures selected based upon display order.

13. The apparatus of claim 12 , wherein the display order of the inter coded pictures is determined based on a picture order count (POC) value.

14. The apparatus of claim 13 , wherein the POC value is a smallest POC value.

15. The apparatus of claim 12 , wherein the film grain supplemental information and the additional film grain supplemental information is included in film grain supplemental enhancement information (SEI) messages.

16. The apparatus of claim 15 , wherein only one of the film grain SEI messages corresponds to a particular inter coded picture with a smallest POC value.

17. The apparatus of claim 16 , wherein the only one of the film grain SEI messages corresponding to the particular inter coded picture is the same as the film grain SEI message of an intra coded picture that precedes the particular inter coded picture, in decode order.

18. The apparatus of claim 12 , wherein the simulating of film grain is bit accurate.

19. The apparatus of claim 12 , wherein the simulating of film grain is bit accurate regardless of a play mode used.

20. The apparatus of claim 19 , wherein the play mode used is normal mode.

21. The apparatus of claim 19 , wherein the play mode used is trick mode.

22. The apparatus of claim 12 , wherein the ordered sequence is the display order.