Signal prediction device and camera equipped with a signal prediction device

• US 20020054214A1
• Filed: 09/21/2001
• Published: 05/09/2002
• Est. Priority Date: 09/22/2000
• Status: Abandoned Application

• Current Assignee: Nikon Corporation
• Original Assignee: Nikon Corporation
• Inventors: Yoshikawa, Toshikazu
• Application Number:
  US09/957,610
• Publication Number:
  US 20020054214A1
• Time in Patent Office: Days
• US Class Current: 348/207.99
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/683 performed by a processor, e.g. controlling the readout of an image memory
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

A signal prediction device and camera including a signal prediction device are provided in which the signal prediction device includes a signal detection part for detecting a signal series, a prediction coefficient calculation part for calculating prediction coefficients using the detected signal series, and a prediction calculation part for performing operations on the prediction coefficients and an updated signal series to predict future signals, wherein the updated signal series includes at least one future signal value for which a prediction operation has been previously performed from a signal series detected by the signal detection part and the prediction coefficients as the current signals.

Claims

1. A signal prediction device, comprising:

a signal detection part for detecting a signal series;

a prediction coefficient calculation part for calculating prediction coefficients using the detected signal series; and

a prediction calculation part for performing operations on the prediction coefficients and an updated signal series to predict future signals, wherein the updated signal series includes at least one future signal value for which a prediction operation has been previously performed from a signal series detected by the signal detection part and the prediction coefficients as a current signal.

2. The signal prediction device according to claim 1, further comprising:

an iterations determining part for determining whether the number of iterations of the prediction operation has reached a specified number determined by the desired time interval until the future that is to be predicted;

a first signal memory part for storing signal series composed of a plurality of past detected signals;

a second signal memory part for storing signal series composed of the latest of a plurality of detected signals; and

a third signal memory part that stores signal series output from the second signal memory part in the initial stages, but discards the oldest signal in said signal series every time it determines that the specified number is not reached while also adding a future signal resulting from a prediction operation as a current signal, thereby performing the updating, wherein the prediction coefficient calculation part calculates the prediction coefficients using the signal series stored in the above-mentioned first signal memory part, and the prediction calculation part performs an operation to predict future signals using the prediction coefficients and the signal series stored in the third signal memory part.

3. The signal prediction device according to claim 2, wherein the prediction coefficient calculation part comprises:

a forward/backward prediction error minimizing operation part for calculating the prediction coefficients minimizing forward prediction error and backward prediction error as well as prediction error for the prediction coefficients;

a prediction error determining part that determines whether the prediction error for the prediction coefficient satisfies a specified precision; and

a prediction degree setting part that raises the prediction degree and resets when the prediction error is determined to not satisfy the specified precision by the prediction error determining part.

4. The signal prediction device according to claim 3, wherein the signal includes a camera hand movement signal.

5. The signal prediction device according to claim 2, wherein the signal includes a camera hand movement signal.

6. The signal prediction device according to claim 1, wherein the prediction coefficient calculation part comprises:

a forward/backward prediction error minimizing operation part for calculating the prediction coefficients based on minimizing a forward prediction error, a backward prediction error and a prediction error for the prediction coefficients;

a prediction error determining part that determines whether the forward/backward prediction error satisfies a specified precision; and

a prediction degree setting part that raises the prediction degree and resets when the prediction error is determined to not satisfy the specified precision by the prediction error determining part.

7. The signal prediction device according to claim 6, wherein the signal includes a camera hand movement signal.

8. A signal prediction device, comprising:

a signal detection part for detecting a signal series;

a prediction coefficient calculation part for calculating prediction coefficients using the detected signal series; and

a prediction calculation part for performing operations on a linear weighted sum of the prediction coefficients and an updated signal series to predict future signals, wherein the updated signal series includes at least one future signal value for which a prediction operation has been previously performed from the linear weighted sum of the signal series detected by the signal detection part and the prediction coefficient as a current signal.

9. The signal prediction device according to claim 8, further comprising:

an iterations determining part for determining whether the number of iterations of the prediction operation has reached a specified number determined by the desired time interval until the future that is to be predicted;

a first signal memory part for storing signal series composed of a plurality of past detected signals;

a second signal memory part for storing signal series composed of the latest of a plurality of detected signals; and

a third signal memory part that stores signal series output from the second signal memory part in the initial stages, but discards the oldest signal in said signal series every time it determines that the specified number is not reached while also adding a future signal resulting from a prediction operation as a current signal, thereby performing the updating, wherein the prediction coefficient calculation part calculates the prediction coefficients using the signal series stored in the above-mentioned first signal memory part, and the prediction calculation part performs an operation to predict future signals using the prediction coefficients and the signal series stored in the third signal memory part.

10. The signal prediction device according to claim 9, wherein the prediction coefficient calculation part comprises:

a forward/backward prediction error minimizing operation part for calculating the prediction coefficients minimizing forward prediction error and backward prediction error as well as prediction error for the prediction coefficients;

a prediction error determining part that determines whether the prediction error for the prediction coefficient satisfies a specified precision; and

a prediction degree setting part that raises the prediction degree and resets when the prediction error is determined to not satisfy the specified precision by the prediction error determining part.

11. The signal prediction device according to claim 10, wherein the signal includes a camera hand movement signal.

12. The signal prediction device according to claim 9, wherein the signal includes a camera hand movement signal.

13. The signal prediction device according to claim 8, wherein the prediction coefficient calculation part comprises:

a forward/backward prediction error minimizing operation part for calculating the prediction coefficients based on minimizing a forward prediction error, a backward prediction error and a prediction error for the prediction coefficients;

a prediction error determining part that determines whether the forward/backward prediction error satisfies a specified precision; and

a prediction degree setting part that raises the prediction degree and resets when the prediction error is determined to not satisfy the specified precision by the prediction error determining part.

14. The signal prediction device according to claim 13, wherein the signal includes a camera hand movement signal.

16. The camera according to claim 15, wherein the signal prediction device further comprises:

an iterations determining part for determining whether the number of iterations of the prediction operation has reached a specified number determined by the desired time interval until the future that is to be predicted;

a first signal memory part for storing signal series composed of a plurality of past detected signals;

a second signal memory part for storing signal series composed of the latest of a plurality of detected signals; and

a third signal memory part that stores signal series output from the second signal memory part in the initial stages, but discards the oldest signal in said signal series every time it determines that the specified number is not reached while also adding a future signal resulting from a prediction operation as a current signal, thereby performing the updating, wherein the prediction coefficient calculation part calculates the prediction coefficients using the signal series stored in the above-mentioned first signal memory part, and the prediction calculation part performs an operation to predict future signals using the prediction coefficients and the signal series stored in the third signal memory part.

17. The camera according to claim 16, wherein the prediction coefficient calculation part comprises:

a forward/backward prediction error minimizing operation part for calculating the prediction coefficients minimizing forward prediction error and backward prediction error as well as prediction error for the prediction coefficients;

a prediction error determining part that determines whether the prediction error for the prediction coefficient satisfies a specified precision; and

a prediction degree setting part that raises the prediction degree and resets when the prediction error is determined to not satisfy the specified precision by the prediction error determining part.

18. The camera according to claim 15, wherein the prediction coefficient calculation part comprises:

a forward/backward prediction error minimizing operation part for calculating the prediction coefficients based on minimizing a forward prediction error, a backward prediction error and a prediction error for the prediction coefficients;

a prediction error determining part that determines whether the forward/backward prediction error satisfies a specified precision; and

a prediction degree setting part that raises the prediction degree and resets when the prediction error is determined to not satisfy the specified precision by the prediction error determining part.

20. The camera according to claim 19, wherein the signal prediction device further comprises:

an iterations determining part for determining whether the number of iterations of the prediction operation has reached a specified number determined by the desired time interval until the future that is to be predicted;

a first signal memory part for storing signal series composed of a plurality of past detected signals;

a second signal memory part for storing signal series composed of the latest of a plurality of detected signals; and

a third signal memory part that stores signal series output from the second signal memory part in the initial stages, but discards the oldest signal in said signal series every time it determines that the specified number is not reached while also adding a future signal resulting from a prediction operation as a current signal, thereby performing the updating, wherein the prediction coefficient calculation part calculates the prediction coefficients using the signal series stored in the above-mentioned first signal memory part, and the prediction calculation part performs an operation to predict future signals using the prediction coefficients and the signal series stored in the third signal memory part.

21. The camera according to claim 20, wherein the prediction coefficient calculation part comprises:

a forward/backward prediction error minimizing operation part for calculating the prediction coefficients minimizing forward prediction error and backward prediction error as well as prediction error for the prediction coefficients;

a prediction error determining part that determines whether the prediction error for the prediction coefficient satisfies a specified precision; and

a prediction degree setting part that raises the prediction degree and resets when the prediction error is determined to not satisfy the specified precision by the prediction error determining part.

22. The camera according to claim 19, wherein the prediction coefficient calculation part comprises:

a forward/backward prediction error minimizing operation part for calculating the prediction coefficients based on minimizing a forward prediction error, a backward prediction error and a prediction error for the prediction coefficients;

a prediction error determining part that determines whether the forward/backward prediction error satisfies a specified precision; and

a prediction degree setting part that raises the prediction degree and resets when the prediction error is determined to not satisfy the specified precision by the prediction error determining part.

15. A camera, comprising:

a photographic lens;

an image detection part,

a signal prediction device; and

a hand movement compensation part that compensates to minimize hand movement based on a hand movement signal predicted by the signal prediction device, wherein the signal prediction device comprises;

a signal detection part for detecting a camera hand movement signal series;

a prediction coefficient calculation part for calculating prediction coefficients using the detected signal series;

a prediction calculation part for performing operations on the prediction coefficients and an updated signal series to predict future signals, wherein the updated signal series includes at least one future signal value for which a prediction operation has been previously performed from a signal series detected by the signal detection part and the prediction coefficients as a current signal.

19. A camera, comprising:

a photographic lens;

an image detection part;

a signal prediction device; and

a hand movement compensation part that compensates to minimize hand movement based on a hand movement signal predicted by the signal prediction device, wherein the signal prediction device comprises;

a signal detection part for detecting a camera hand movement signal series;

a prediction coefficient calculation part for calculating prediction coefficients using the detected signal series; and

a prediction calculation part for performing operations on a linear weighted sum of the prediction coefficients and an updated signal series to predict future signals, wherein the updated signal series includes at least one future signal value for which a prediction operation has been previously performed from the linear weighted sum of the signal series detected by the signal detection part and the prediction coefficient as a current signal.