Three dimensional composite video motion detection

• US 5,043,807 A
• Filed: 05/23/1989
• Issued: 08/27/1991
• Est. Priority Date: 05/23/1989
• Status: Expired due to Fees

• Current Assignee: Zenith Electronics Corporation (LG Corporation)
• Original Assignee: Zenith Electronics Corporation (LG Corporation)
• Inventors: Rabii, Khosro M.
• Primary Examiner(s): Peng, John K.
• Application Number:
  US07/356,038
• Time in Patent Office: 826 Days
• Field of Search: 358/105, 358/11, 358/167, 358/36, 358/140, 358/31
• US Class Current: 348/699
• CPC Class Codes: H04N 5/144 Movement detection for video coding H04N19/503; analysis of motion in general G06T7/20

Abstract

A system and method for motion detection in a composite video signal is disclosed. These dimensional (horizontal, vertical and time) analysis is performed on actual picture element content to monitor variations therein. Vector generation, approximation and analysis gives information on picture element content for intra-field, inter-frame and inter-field signal processing. Additionally, noise immunity through selection of a convergence zone for the disclosed vector analysis is also provided. Control signals for further video signal processing are likewise generated.

Claims

1. A method for detecting motion in a composite video signal for display on a television receiver or monitor comprising:

generating a first set of vectors indicative of picture content of a single frame in a received composite video signal;

resolving said first set of vectors;

comparing said resolved vectors with a preselected convergence range; and

providing an indication of intra-frame motion when said resolved vectors fall outside said preselected convergence range.

2. The method of claim 1 further including providing an indication of no intra-frame motion when said resolved vectors fall within said preselected convergence range.

3. The method of claim 1 further including:

generating a second set of vectors indicative of picture content of at least two successive frames in a received composite video signal;

resolving said second set of vectors;

comparing said resolved second set of vectors with a second preselected convergence range; and

providing an indication of inter-frame motion when said second set of resolved vectors fall outside said second preselected convergence range.

4. The method of claim 3 further including providing an indication of no inter-frame motion when said resolved vectors fall within said second preselected convergence range.

5. A method for improving television system response to noise in a transmission environment comprising:

generating a first set of signals indicative of variations in picture content within a single frame of a received composite video signal; and

combining said first set of signals;

generating a first signal indicative of a first method for further processing of said composite video signal when combined signals exceed a preselected value; and

generating a second signal indicative of a second method for further processing of said composite video signal when said combined signals do not exceed said preselected value.

6. The method of claim 5 further comprising:

generating a second set of signals indicative of variations in picture content between adjacent frames of said received composite video signal;

combining said second set of signals;

generating said first signal indicative of a first method for further processing of said received composite video signal when at least one of said combined first and second sets of signals exceeds a preselected value; and

generating said second signal indicative of said second method for further processing of said composite video signal when both of said combined signals do not exceed said preselected value.

7. A method for use in detecting motion in a television signal including:

generating a first signal indicative of spatial variance in a received television signal;

generating a second signal indicative of temporal variance in said received television signal;

comparing said first signal with a first preselected value;

generating a first state signal when said first signal exceeds said first preselected value;

comparing said second signal with a second preselected value; and

generating said first state signal when said second signal exceeds said second preselected value.

8. The method of claim 7 further including generating a second state signal when said first preselected value exceeds said first signal and said second preselected value exceeds said second signal.

9. A method for detecting motion in a television signal including:

generating a first signal indicative of spatial variance in a received television signal, comprising generating at least one pair of spatial vectors representative of variations in content within a frame of a television picture signal; and

generating a second signal indicative of temporal variance in said received television signal.

10. The method of claim 9 further including generating a first state signal when either of said first and second signals exceeds a preselected value.

11. The method of claim 10 further including generating a second state signal when neither of said first and second signals exceeds said preselected value.

12. The method of claim 9 further including generating at least a second pair of spatial vectors representative of variations within a second frame of a television picture signal.

13. The method of claim 12 further including:

resolving said one pair of spatial vectors representative of variations in content within a frame and said second pair of spatial vectors representative of variations within a second frame to obtain a resolved spatial value;

comparing said resolved spatial value with a predetermined value indicative of acceptable system noise; and

generating a first output signal when said resolved spatial value is less than said predetermined value.

14. The method of claim 13 further including generating a second output signal when said resolved spatial value is greater than said predetermined value.

15. The method of claim 14 wherein said generating said first signal indicative of temporal variance comprises generating at least one pair of temporal vectors representative of variations in content between two or more fields of a television picture signal.

16. The method of claim 15 further including generating at least a second pair of temporal vectors representative of variations between two or more fields of a television picture signal.

17. The method of claim 16 further including:

resolving said one pair of temporal vectors representative of variations in content between two or more fields and said second pair of temporal vectors representative of variations between two or more fields to obtain a resolved temporal value;

comparing said resolved temporal value with a predetermined value indicative of acceptable system noise; and

generating a first output signal when said resolved temporal value is less than said predetermined value.

18. The method of claim 17 further including generating a second output signal when said resolved temporal value is greater than said predetermined value.

19. The method of claim 18 wherein said television picture signal comprises a composite video signal.

20. The method of claim 18 further including generating a control signal indicative of whether said first output signal or said second output signal has been generated.

21. A method for detecting motion in a television signal including:

generating a first signal indicative of spatial variance in a received television signal; and

generating a second signal indicative of temporal variance in said received television signal comprising generating at least one pair of temporal vectors representative of variations in content between two or more fields of a television picture signal.

22. The method of claim 21 wherein said television picture signal comprises a composite video signal.

23. The method of claim 21 further including generating at least a second pair of temporal vectors representative of variations between two or more fields of a television picture signal.

24. The method of claim 23 further including:

resolving said one pair of temporal vectors representative of variations in content between two or more fields and said second pair of temporal vectors representative of variations between two or more fields to obtain a resolved temporal value;

comparing said resolved temporal value with a predetermined value indicative of acceptable system noise; and

generating a first output signal when said resolved temporal value is less than said predetermined value.

25. The method of claim 24 further including generating a second output signal when said resolved temporal value is greater than said predetermined value.

26. A system for detecting motion in a television picture signal comprising:

means for generating a first signal indicative of spatial variance in a received television signal by generating a set of vectors representative of variation in picture content within one or more frames of a television picture signal; and

means for generating a second signal indicative of temporal variance in said received television signal.

27. The system of claim 26 further including means for generating a first output signal when either of said first signal and said second signal is greater than a predetermined value.

28. The system of claim 27 further including means for generating a second output signal when neither of said first signal and said second signal are greater than said predetermined value.

29. The system of claim 26 wherein said television picture signal is a composite video signal.

30. The system of claim 26 wherein said means for generating a set of vectors comprises means for generating at least one pair of spatial vectors representative of picture content within a frame of a received television picture signal.

31. The system of claim 30 further including means for generating a second pair of spatial vectors representative of picture content within a second frame of said received television signal.

32. The system of claim 31 further including means for resolving said one and said second pairs of spatial vectors to generate a resolved spatial value.

33. The system of claim 32 further comprising means for generating a first output signal when said resolved spatial value exceeds a predetermined value.

34. The system of claim 33 further comprising means for generating a second output signal when said resolved spatial value does not exceed said predetermined value.

35. The system of claim 34 wherein said means for generating a second signal indicative of temporal variance comprises means for generating a set of vectors representative of variation in picture content between two or more fields of a television picture signal.

36. The system of claim 35 wherein said means for generating a set of vectors representative of variation in picture content between two or more fields comprises means for generating at least one pair of temporal vectors representative of picture content variation between two fields of a received television picture signal.

37. The system of claim 36 further including means for generating a second pair of temporal vectors representative of picture content variation between two fields of said received television signal.

38. The system of claim 37 further including means for resolving said one and said second pairs of temporal vectors to generate a resolved temporal value.

39. The system of claim 38 further comprising means for generating a first output signal when said resolved temporal value exceeds a predetermined temporal value.

40. The system of claim 39 further comprising means for generating a second output signal when said resolved temporal value does not exceed said predetermined temporal value.

41. A system for detecting motion in a television picture signal comprising:

means for generating a first signal indicative of spatial variance in a received television signal; and

means for generating a second signal indicative of temporal variance in said received television signal by generating a set of vectors representative of variation in picture content between two or more fields of a television picture signal.

42. The system of claim 41 wherein said television picture signal is a composite video signal.

43. The system of claim 41 wherein said means for generating a set of vectors comprises means for generating at least one pair of temporal vectors representative of picture content variation between two fields of a received television picture signal.

44. The system of claim 43 further including means for generating a second pair of temporal vectors representative of picture content variation between two fields of said received television signal.

45. The system of claim 44 further including means for resolving said one and said second pairs of temporal vectors to generate a resolved temporal value.

46. The system of claim 45 further comprising means for generating a first output signal when said resolved temporal value exceeds a predetermined value.

47. The system of claim 46 further comprising means for generating a second output signal when said resolved temporal value does not exceed said predetermined value.

48. A system for improving noise sensitivity in composite video signal processing comprising:

first means for combining signals representative of picture content in a display field to generate one or more signals indicative of intra-field motion;

second means for combining signals representative of picture content between two adjacent display fields to generate one or more signals indicative of inter-field motion; and

third means for combining signals representative of picture content in two adjacent display frames to generate one or more signals indicative of inter-frame motion.

49. The system of claim 48 further comprising:

first resolving means for resolving said one or more signals indicative of intra-field motion; and

second resolving means for resolving said one or more signals indicative of inter-field motion and said one or more signals indicative of inter-frame motion.

50. The system of claim 49 wherein said first resolving means further comprises means for generating a first output signal when said resolved signals exceed a preselected value and a second output signal when said resolved signals do not exceed said preselected value.

51. The system of claim 50 wherein said second resolving means further comprises means for generating a first output signal when said resolved signals exceed another preselected value and a second output signal when said resolved signals do not exceed said another preselected value.

52. A system for processing television picture signals based on actual picture content to allow improved noise discrimination comprising:

first combining means for combining a vector indicative of the difference between pixels of a like, first chroma polarity in a first display field with a vector indicative of the difference between pixels of a like, but opposite, chroma polarity in another display field to produce an output;

second combining means for combining a vector indicative of the difference between pixels having the same chroma polarity, opposite to said first chroma polarity, in said first display field and a vector indicative of the difference between pixels having the same, first chroma polarity in said another display field to produce an output;

means for resolving an output of each of said first and second combining means to a first value if said output has a magnitude less than or equal to preselected magnitude; and

comparison means coupled to said means for resolving for generating a first output signal when the output of each of said combining means has been resolved to said first value indicative of an acceptable variance in picture content within said first and another display fields and for otherwise generating a second output signal.

53. The system of claim 52 further comprising:

third combining means for combining a vector indicative of the difference between pixels having a first, same chroma polarity located in two different display fields and another vector indicative of the difference between pixels, at least one being located in each of said two different display fields, having the same chroma polarity, opposite to said first chroma polarity to produce an output;

fourth combining means for combining a vector indicative of the difference between pixels having a chroma polarity opposite to said first polarity located in two different display fields and another vector indicative of the difference between pixels, at least one being located in each of said two different display fields, each having said first chroma polarity to produce an output;

means for resolving an output of each of said third and fourth combining means to a first value if said output has a magnitude less than or equal to a preselected magnitude; and

comparison means coupled to said means for resolving for generating a first output signal when the output of each of said combining means has been resolved to said first value indicative of an acceptable variance in picture content within said first and another display fields and for otherwise generating a second output signal.

54. The system of claim 53 further comprising logic means associated with said comparison means for generating a first control signal when both of said comparison means generate said first output and a second control signal when either of said comparison means generates said second output signal.

55. The system of claim 53 further comprising:

means for separating the chroma component from said vector inputs to said first combining means and from said vector inputs to second combining means; and

means for comparing said separated chroma components from said vector inputs to generate a first output signal when said separated chroma components are equal in magnitude and a second output signal when said separated chroma components are not equal in magnitude.

56. The system of claim 55 wherein said means for comparing comprises:

means for normalizing said separated chroma components to a first value whenever they have a magnitude within a preselected range of magnitudes; and

means responsive to said means for normalizing to generate a first output signal when each of said separated chroma components has been normalized and when said separated chroma components are equal in value and to generate a second output signal when either of said chroma components has not been normalized and said separated chroma components are not equal in magnitude.

57. The system of claim 56 further comprising logic means associated with said comparison means and said means responsive to said means for normalizing for generating a first control signal when both of said comparison means and said means responsive to said means for normalizing generate said first output and a second control signal when either of said comparison means or said means responsive generate said second output signal.

58. A system for generating signals indicative of content in a received television signal comprising:

delay means responsive to a plurality of signals representative of one or more pixels in a current display line and one or more pixels from other display lines from the current and previous display fields; and

combining means responsive to said plurality of signals and to said delay means for providing a plurality of combined output signals.

59. The system of claim 58 wherein said delay means comprises:

a first delay circuit for receiving a signal indicative of a first pixel from a current display line in a current display field;

a second delay circuit for receiving a signal indicative of a second, corresponding pixel from a previous display line in said current display field;

a third delay circuit for receiving a signal indicative of a pixel corresponding to said first pixel from a display line in a previous display field;

a fourth delay circuit for receiving a signal indicative of a pixel corresponding to said first pixel from a display line in a previous display frame; and

a fifth delay circuit for receiving a signal indicative of a pixel corresponding to said second pixel from a display line in a previous display frame.

60. The system of claim 59 wherein each of said delay circuits comprises a two pixel delay circuit.

61. The system of claim 59 further wherein said combining means comprises:

first summer means adapted to receive said signal indicative of said first pixel in said current display line at a first input and the output of said second delay circuit at a second input to generate an output signal representative of the difference between tow pixels in said current display field, said two pixels having a first, like chroma polarity;

second summer means adapted to receive said signal indicative of said first pixel in said current display line at a first input and the output of said third delay circuit at a second input to generate an output signal representative of the difference between two pixels in said separate display fields, said two pixels having a first, like chroma polarity;

third summer means adapted to receive said signal indicative of said second, corresponding pixel from another display line in said current display field at a first input and the output of said first delay circuit at a second input to generate an output signal representative of the difference between two pixels in said current display field, said two pixels having a like chroma polarity, opposite to said first polarity;

fourth summer means adapted to receive said signal indicative of said pixel corresponding to first pixel from a previous display field at a first input and the output of said first delay circuit at a second input to generate an output signal representative of the difference between two pixels in said separate display fields, said two pixels having a like chroma polarity, opposite to said first polarity;

fifth summer means adapted to receive said signal indicative of a pixel corresponding to said first pixel from a display line of a previous display frame at a first input and the output of said first delay circuit at a second input to generate an output signal representative of the difference between two pixels in said separate display frames said two pixels having a like chroma polarity, opposite to said first polarity;

sixth summer means adapted to receive said signal indicative of said first pixel in said current display line at a first input and the output of said fourth delay circuit at a second input to generate an output signal representative of the difference between two pixels in said separate display frames, said two pixels having a first, like chroma polarity;

seventh summer means adapted to receive said signal indicative of a pixel corresponding to said second pixel from a current display line of a previous display frame at a first input and the output of said fourth delay circuit at a second input to generate an output signal representative of the difference between two pixels in another display field, said two pixels having a first, like chroma polarity; and

eighth summer means adapted to receive said signal indicative of a pixel corresponding to said first pixel from a display line of a previous display frame at a first input and the output of said fifth delay circuit at a second input to generate an output signal representative of the difference between two pixels in said separate display fields, said two pixels having a like chroma polarity, opposite to said first polarity.

62. The system of claim 58 wherein said generated signals indicative of content in a received television signal are used for improving noise immunity in a displayed picture.

63. The system of claim 58 wherein said generated signals indicative of content in a received television signal are used for detecting motion in a displayed picture.