Method and apparatus for coding a sectional video image
First Claim
1. A method for providing a sectional video view with a controllable zoom, pan and tilt defined by a boundary within a general video view captured by a first camera of an end-point by consecutively capturing video images of the general view which are being processed by a coding process, creating a first coded video signal representing the general view, at least generating a predicted video image of a first current video image and subtracting the predicted video image from the first current video image, characterized in that the coding process further includes the steps of:
- receiving a control signal defining the boundary within the general video view, extracting a first set of pixel values lying within the boundary in the first current video image or in a second current video image captured by a second camera, creating a residual of the sectional video image by subtracting a second set of pixel values from said first set of pixel values, creating a second coded video signal representing the sectional video view by further compressing the residual according to the coding process.
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Accused Products
Abstract
The present invention utilizes video compression techniques in providing multi display and user control of picture layout with a single non-mechanical camera. According to a preferred embodiment of the present invention, a subsection of interest within a general view captured by the camera is coded based on the prediction of the main picture. In one aspect of the embodiment, scaling of the predicted pixel values in the subsection to match with the corresponding raw pixel data of extended resolution is carried out before subtracting the prediction from the raw data to provide the residual in the coding process. In a second aspect, the frame rate and the number of quantization intervals are increased when coding the subsection relative to the coding of the general view.
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Citations
12 Claims
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1. A method for providing a sectional video view with a controllable zoom, pan and tilt defined by a boundary within a general video view captured by a first camera of an end-point by consecutively capturing video images of the general view which are being processed by a coding process, creating a first coded video signal representing the general view, at least generating a predicted video image of a first current video image and subtracting the predicted video image from the first current video image,
characterized in that the coding process further includes the steps of: -
receiving a control signal defining the boundary within the general video view, extracting a first set of pixel values lying within the boundary in the first current video image or in a second current video image captured by a second camera, creating a residual of the sectional video image by subtracting a second set of pixel values from said first set of pixel values, creating a second coded video signal representing the sectional video view by further compressing the residual according to the coding process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Apparatus for providing a sectional video view with a controllable zoom, pan and tilt defined by a boundary within a general video view captured by a first camera of an end-point by consecutively capturing video images of the general view which are being processed by a coding process, creating a first coded video signal representing the general view, at least generating a predicted video image of a first current video image and subtracting the predicted video image from the first current video image, characterized in that the apparatus comprises:
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means for receiving a control signal defining the boundary within the general video view, means for extracting a first set of pixel values lying within the boundary in the first current video image or in a second current video image captured by a second camera, means for creating a residual of the sectional video image by subtracting a second set of pixel values from said first set of pixel values, means for creating a second coded video signal representing the sectional video view by further compressing the residual according to the coding process.
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Specification