Motion display technique

• US 6,462,785 B1
• Filed: 06/04/1997
• Issued: 10/08/2002
• Est. Priority Date: 06/04/1997
• Status: Expired due to Term

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Ensor, James Robert, Carraro, Gianpaolo U., Edmark, John T.
• Primary Examiner(s): Faile, Andrew
• Assistant Examiner(s): BROWN, RUEBEN M
• Application Number:
  US08/869,056
• Time in Patent Office: 1,952 Days
• Field of Search: 348/578, 348/558, 348/594, 348/595, 348/625, 348/630, 348/667, 348/673, 348/121, 348/122, 348/459, 348/699, 375/240-241
• US Class Current: 348/578
• CPC Class Codes: H04N 19/137 Motion inside a coding unit, e.g. average field, frame or block difference
• CPC Class Codes: H04N 19/503 involving temporal prediction adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109
• CPC Class Codes: H04N 19/80 Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation H04N19/635, H04N19/86 take precedence
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression
• CPC Class Codes: H04N 5/262 Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

Abstract

When there is an inability to convey motion that is occurring in the frames of a video source by a full-frame-rate transmission, a surrogate effect, other than another form of motion, may be used as a compensation technique to better convey motion to a viewer. The surrogate effect employed may be a) fading, b) wiping, c) dissolving, d) blurring, e) enhancing the contrast, f) enhancing one or more colors, g) enhancing the brightness, h) scaling the image, and i) the like. How the surrogate effect is applied to any frame may be a function of one or more video frames. Optionally, more than one effect may be used in combination. Advantageously, a more continuous sense of motion is perceived by a viewer. In one embodiment of the invention, full-frame-rate video is initially available. A controller monitors the ability to transmit or display full-frame-rate video. In the event that it is determined that, ultimately, full-frame-rate video cannot be displayed to a user, the images of the frames that will be displayed are adjusted to incorporate a surrogate effect that helps to better convey the intended motion to the viewer. The surrogate effect applied may be selected as a joint function of the available frame rate and knowledge of the content, e.g., the specific type of motion, intended to be shown to the viewer.

Claims

1. A method for use in processing frames of a video signal in which motion occurs, said video signal having a source frame rate, comprising the steps of:

determining that the video signal is to be displayed at a second frame rate different from the source frame rate; and

applying a surrogate effect, other than another form of motion, to a portion of the video signal when the video signal is displayed at the second frame rate whereby the motion is better conveyed to a viewer.

2. The invention as defined in claim 1 wherein said portion of the video signal is a frame of the video signal.

3. The invention as defined in claim 1 wherein said portion of the video signal is a plurality of frames of the video signal.

4. The invention as defined in claim 1 wherein said surrogate effect is one of a group consisting of:

fading, wiping, dissolving, blurring, contrast enhancing, enhancing one or more colors, brightness enhancing, scaling.

5. The invention as defined in claim 1 wherein said surrogate effect is a combination of at least two effects.

6. The invention as defined in claim 1 wherein said surrogate effect is a combination of at least two effects from the group consisting of:

fading, wiping, dissolving, blurring, contrast enhancing, enhancing one or more colors, brightness enhancing, scaling.

7. The invention as defined in claim 1 wherein, in said applying step, said surrogate effect is applied to a frame of said video signal as a function of information in one frame of said video signal.

8. The invention as defined in claim 1 wherein, in said applying step, said surrogate effect is applied to a frame of said video signal as a function of information in at least one frame of said video signal.

9. The invention as defined in claim 1 further including the step of determining said surrogate effect for application in said applying step.

10. The invention as defined in claim 1 further including the step of determining said surrogate effect for application in said applying step as a function of a plurality of surrogate effects using as basis for determining said surrogate effect information from at least one frame of said video signal.

11. The invention as defined in claim 1 wherein said second frame rate is greater than said source frame rate.

12. The invention as defined in claim 1 wherein said second frame rate is less than said source frame rate.

13. Apparatus for use in video signal processing, comprising:

means for receiving a video signal having a source frame rate; and

a processor for determining that the video signal is to he displayed at a second frame rate different from the source frame rate and for applying a surrogate effect, other than another form of motion, to a portion of the video signal when the video signal is displayed at the second frame rate whereby the motion is better conveyed to a viewer.

14. The invention as defined in claim 13 wherein said video signal is received from a network.

15. The invention as defined in claim 13 wherein second frame rate is greater than said source frame rate.

16. The invention as defined in claim 13 wherein second frame rate is less than said source frame rate.

17. The invention as defined in claim 13 wherein second frame rate is less than said source frame rate because frames of said source video are not available at a time when they need to be displayed.

18. The invention as defined in claim 13 wherein said surrogate effect is selected from the group consisting of:

fading, wiping, dissolving, blurring, contrast enhancing, enhancing one or more colors, brightness enhancing, scaling.

19. Apparatus for use with a video transmission system that includes a video server and a network, comprising:

a video signal receiver adapted to receive video signals transported by said network; and

a processor for determining if said video signal, as received by said video signal adapter, is to be displayed at a second frame rate different from the source frame rate as supplied by said video server and for applying a surrogate effect, other than another form of motion, to a portion of the video signal, as received by said video signal adapter, when the video signal is displayed at the second frame rate.

20. The invention as defined in claim 19 wherein said surrogate effect selected is selected as a function of a type of motion being conveyed.

21. The invention as defined in claim 20 wherein said surrogate effect is selected from the group consisting of:

fading, wiping, dissolving, blurring, contrast enhancing, enhancing one or more colors, brightness enhancing, scaling.

22. The invention as defined in claim 19 wherein said video signal is arranged into packets.

23. The invention as defined in claim 22 wherein said surrogate effect selected is selected as a function of information encoded in at least one of said packets.

24. The invention as defined in claim 22 wherein said surrogate effect selected is selected as a function of information encoded in a packet that is transmitted along with said packets of said video signal.

25. A method for use in processing frames of a video signal in which motion occurs, said video signal having a source frame rate, comprising the steps of:

determining that the video signal is to be displayed at a second frame rate different from the source frame rate; and

applying a surrogate effect, other than another form of motion, to a portion of the video signal when the video signal is displayed at the second frame rate whereby the motion is better conveyed to a viewer;

wherein said surrogate effect is one of a group consisting of;

fading, wiping, dissolving, blurring, scaling.

26. The invention as defined in claim 25 further including the step of determining said surrogate effect for application in said applying step.

27. The invention as defined in claim 25 further including the step of determining said surrogate effect for application in said applying step as a function of a plurality of surrogate effects using as basis for determining said surrogate effect information from at least one frame of said video signal.

28. The invention as defined in claim 25 further including the step of selecting said surrogate effect from an available plurality of surrogate effects.

29. The invention as defined in claim 25 wherein said surrogate effect selected is selected as a function of a type of motion being conveyed.