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| Security and fire control system |
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| Method and system for asymmetrically maintaining system operability |
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| Method and system for monitoring computer networks and equipment |
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| Managing switched virtual circuits in a network |
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Motion detection and motion compensative prediction circuit
| Details |
Inventors: Yanagita, Yukio;
Assignee: Sony Corporation (JP)
Primary Examiner: Lee; Young
Assistant Examiner:
Attorney, Agent or Firm: Rader, Fishman & Grauer, Kananen; Ronald P.
A motion detecting and motion compensative prediction circuit includes an integer pixel accuracy calculating unit for carrying out calculation for detecting, with an integer pixel accuracy, a portion most approximate to an object of a current frame from a predetermined reference frame, and a half pixel accuracy calculating and motion compensative prediction unit (including a buffer memory, a re-arranging unit for rearranging a picture data supplied thereto through the buffer memory by a pixel unit, and an interpolation unit for subjecting the picture data re-arranged by the re-arranging unit to linear interpolation calculation). The buffer memory, the re-arranging unit and the interpolation means of the half-pixel accuracy calculating and motion compensative prediction unit are commonly employed both of a processing for detecting a half-pixel accuracy motion vector based on the calculation result of the integer pixel accuracy calculating unit and a processing for generating a predictive-coded picture by using the motion vector. |
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DETAILED DESCRIPTION In view of such aspects, it is an object of the present invention to provide a motion-detecting and motion compensative prediction circuit having a smaller circuit scale.
A motion detecting and motion compensative prediction circuit according to the present invention is roughly divided into two circuit parts: (1) an integer pixel accuracy calculating unit for carrying out calculation for detecting, with an integer pixel accuracy, a portion most approximate to an object of a current frame from a predetermined reference frame; and (2) a half pixel accuracy calculating and motion compensative prediction unit including a buffer memory, a re-arranging means for rearranging a picture data supplied thereto through the buffer memory by a pixel unit, and an interpolation means for subjecting the picture data re-arranged by the re-arranging means to linear interpolation calculation.
According to an aspect of the present invention, the buffer memory, the re-arranging means and the interpolation means of the half-pixel accuracy calculating and motion compensative prediction unit are employed both of a processing for detecting a half-pixel accuracy motion vector based on the calculation result of the integer pixel accuracy calculating unit and a processing for generating a predictive-coded picture by using the motion vector.
Specifically, according to the present invention, in view of the fact that, as shown in FIGS.
5 and 6, a half-pixel accuracy calculating unit and a motion compensative prediction circuit respectively have circuits having common functions such as buffer memory 31 and 41, pixel data input units 32 and 42 and interpolation pixel data generating unit 33 and 43, such circuits are commonly shared by the half-pixel accuracy calculating unit and the motion compensative prediction circuit.
Since this arrangement permits a scale of a circuit for motion detection and motion compensative prediction to be further downsized, the whole of an MPEG encoder, other picture compression encoders and so on can be downsized
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Processing Data 
