METHOD AND APPARATUS FOR TRANSITIONING FROM A FIRST DISPLAY FORMAT TO A SECOND DISPLAY FORMAT
First Claim
Patent Images
1. A letterbox detector, comprising:
- a detection module configured to determine aspect ratio changes in an input signal; and
a transition module configured to transition between a plurality of display modes associated with the aspect ratio changes, wherein a first display mode to a second display mode transition is performed over a first period of time, and a second display mode to a first display mode transition is performed over a second period of time that is different from the first period of time.
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Abstract
A letterbox detector includes a detection module configured to determine aspect ratio changes in an input signal. A transition module is configured to transition between a plurality of display modes associated with the aspect ratio changes. A first display mode to a second display mode transition is performed over a first period of time, and a second display mode to a first display mode is performed gradually over a second period of time, that is different from the first period of time. The letterbox detector may be included in digital and analog displays.
15 Citations
14 Claims
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1. A letterbox detector, comprising:
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a detection module configured to determine aspect ratio changes in an input signal; and a transition module configured to transition between a plurality of display modes associated with the aspect ratio changes, wherein a first display mode to a second display mode transition is performed over a first period of time, and a second display mode to a first display mode transition is performed over a second period of time that is different from the first period of time. - View Dependent Claims (2, 3, 4)
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5. A digital display device, comprising:
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a signal processor configured to receive digital video signals and output processed video signals; a letterbox detector configured to receive the digital video signals, determine active area changes in the digital video signals and provide display mode transition information; a scaler configured to receive the display mode transition information and transition an active picture area using the processed video signals in accordance with the display mode transition information such that the active picture area is transitioned between a first display mode and a second display mode by a first period of time and transitioned between a second display mode and a first display mode by a second period of time that is different from the first period of time. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method for changing display modes in a display device, comprising:
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comparing an active area of a picture to a display mode set on a display; and if the display mode set on the display is different from the determined active area, activating an active area transition from a first display mode to a second display mode by a first period of time; and activating an active area transition from a second display mode to a first display mode by a second period of time that is different from the first period of time. - View Dependent Claims (12, 13, 14)
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Specification