425 results about "Progressive scan" patented technology

An encoding apparatus includes a selector for periodically selecting fields of an interlaced video signal to be converted to respective progressive scanning frames, by a scanning converter which doubles the number of scanning lines per field. The apparatus encodes these frames by intra-frame encoding or unidirectional predictive encoding using preceding ones of the frames, and encodes the remaining fields of the video signal by bidirectional prediction using preceding and succeeding ones of the progressive scanning frames for reference. The resultant code can be decoded by an inverse process to recover the interlaced video signal, or each decoded field can be converted to a progressive scanning frame to thereby enable output of a progressive scanning video signal. Enhanced accuracy of motion prediction for inter-frame encoding can thereby be achieved, and generation of encoded aliasing components suppressed, since all reference pictures are progressive scanning frames rather than pairs of fields constituting interlaced scanning frames.

An interlace-to-progressive scan conversion system comprises: a spatial line averaging prefilter; a motion estimator; a three-stage adaptive recursive filter. The motion estimator comprises: a 3-D recursive search sub-component having a bilinear interpolator; a motion correction sub-component having an error-function including penalties related to the difference between a given candidate vector and a plurality of neighboring vectors; a block erosion sub-component. The motion estimator assumes that motion is constant between fields. The three-stage adaptive recursive filter comprises: a first stage that selects between using static pixels data and moving pixels data from a next field; a second stage that selects a more valid set of data between motion compensated data from a previous field and the pixels selected by the first stage; a third stage that combines an intra-field interpolation with the more valid set of data selected by the second stage.

An interlaced to progressive scan video converter which identifies object edges and directions, and calculates new pixel values based on the edge information. Source image data from a single video field is analyzed to detect object edges and the orientation of those edges. A 2-dimensional array of image elements surrounding each pixel location in the field is high-pass filtered along a number of different rotational vectors, and a null or minimum in the set of filtered data indicates a candidate object edge as well as the direction of that edge. A 2-dimensional array of edge candidates surrounding each pixel location is characterized to invalidate false edges by determining the number of similar and dissimilar edge orientations in the array, and then disqualifying locations which have too many dissimilar or too few similar surrounding edge candidates. The surviving edge candidates are then passed through multiple low-pass and smoothing filters to remove edge detection irregularities and spurious detections, yielding a final edge detection value for each source image pixel location. For pixel locations with a valid edge detection, new pixel data for the progressive output image is calculated by interpolating from source image pixels which are located along the detected edge orientation.

A video system that performs TV signal decoding, deinterlacing, and de-motion-blurring for progressive scan flat panel display is introduced. The system embeds a frame buffer and a scaler for conducting format and resolution conversions for display panels of different sizes. The output of the scaler is sent to a de-motion-blur processor for reducing the blurriness due to the motion of image objects and the slow response time of flat panel display devices. The de-motion-blur processor gets the motion and noise indication signal from scaler or the pre-frame-buffer video processor. Based on the motion and noise information and the information of temporal difference, the de-motion-blur processor performs over driving for the display panel interface and improves the rising and falling response time of the flat panel display. The decoding, deinterlacing, and de-motion-blur processing share the same frame buffer controller so the entire system can be optimized in cost and performance.

The present invention provides a very flexible, digital system for capturing and storing panoramic images using progressive scan (that is, non interlaced) technology. The system includes a digital image input device and an associated control computer. Since the image capture device is digital it can be easily and flexibly controlled by software in the control computer. The image input device has six lenses positioned on the six faces of a cube. While the image input system can have other lens configurations, the use of six lenses in a cubic configuration is optimal for a system that is used to capture a spherical panorama. The six lenses simultaneously focuses different images on six CCDs (Charge Coupled Devices). The image input device also includes an embedded controller, and data compression circuitry. The embedded controller controls the exposure time of the CCDs (i.e. the effective aperture and effective shutter speed) and reads image data from the CCDs. The image data read from the CCDs is compressed, multiplexed, and sent to the control computer. The control computer stores the images in frames, each of which have one image from each of the six lenses. Each frame includes six images that were simultaneously recorded and any associated information, such as audio tracks, textual information, or environmental information such as GPS (Global Position System) data or artificial horizon data. The control computer includes a user interface which allows a user to specify control information such as frame rate, compression ratio, gain, etc. The control computer sends control information to the embedded controller which in turn controls the CCDs and the compression circuitry. The images can be sent from the control computer to a real time viewer so that a user can determine if the correct images are being captured. The images stored at the control computer are later seamed into panoramas and made into panoramic movies.

In a method having an image sensor capable of selectively sensing an image in progressive scanning method and in interlace scanning method, when performing an image sensing operation using an electronic flash, if the image sensing operation is performed in the progressive scanning method, the electronic flash is controlled to flash once for each frame, and if the image sensing operation is performed in the interlace scanning method, the electronic flash is controlled to flash twice for each frame, once for each field.

A spatial-type de-interlacing process to be applied to a digital image for obtaining a spatial reconstruction. Furthermore, to the digital image there are also applied one or more temporal-type motion compensation de-interlacing processes for obtaining one or more temporal reconstructions, and the spatial reconstruction and the one or more temporal reconstructions are sent to a decision module. The decision module applies a cost function to the spatial reconstruction and the temporal reconstructions and chooses from among the spatial reconstruction and the temporal reconstructions the one that minimizes the cost function. Preferential application is to display systems, in particular displays of a cathode-ray type, liquid-crystal type, and plasma type which use a mechanism of progressive scan.

A television line doubler (interlaced to progressive scan converter) incorporating the following aspects—an improved field motion detector which does not treat low frequency vertical transitions as motion; a frame motion detector having an improved ability to differentiate motion from subcarrier signal components; a sawtooth artifact detector; a sawtooth artifact detector in combination with a film pattern detector, such that the artifact detector can take the film pattern detector out of film mode earlier than it would if it only were responsive to a break in the film pattern; tandem field motion detectors; an improved field based film detector; film pattern detectors and motion detectors used therewith which operate by performing end-of-field calculations; the combination of a field motion detector and a frame motion detector such that the frame motion detector provides a motion signal used as a verification by the field motion detector; an improved NTSC film detector requiring a minimum number of NTSC film pattern sequences; and an improved PAL film detector employing a minimum motion threshold detector.

The invention includes a method for converting from an interlace scan image to a progressive scan image. Interpolated rows of pixels, lying between successive rows of the interlace scan image, are generated based upon the received interlace scan rows. The method determines a degree of movement, if any, in the region of a target pixel, and whether a target pixel lies on an edge between visually distinct regions. Multiple potential interpolated values for the target pixel are generated by several interpolation methods, including edge interpolation, inter-field interpolation, non-linear interpolation, and intra-field interpolation. The system uses the degree of movement and edge detection to select or combine one or more of the potential values for the target pixel. At least one correction filter is applied to the result, to correct errors caused by electrical noise in the interlace scan image.

A (50) method and apparatus (110) for determining a scanning format of a frame of a video signal determines (52) if any interfield motion exists within the frame; and indicates (53) that the frame is interlaced scanned if interfield motion is detected and indicates (54) that the frame is progressive scanned if interfield motion is not detected. The determination is based on spatial correlation within and around one or more edges of one or more objects in the frame. This can be accomplished by identifying zig-zag or zipper effects near one or more edges of one or more objects in the frame, identifying motion between fields or identifying motion near one or more edges of one or more objects. A method (100) for determining a field order of two interlaced frames of a video sequence of frames assigns (101) one of the two interlaced frames to be a first frame and the other of the two interlaced frames to be a second frame and assembles (102) two new frames from the two interlaced frames by combining a bottom field of the first frame with the top field of the second frame and by combining a top field of the first frame with a bottom field of the second frame. The number of zipper points in each of the two new frames is then determined and compared. If the number of zipper points in the first frame is smaller than the number of zipper points in the second frame, that the field order of the two frames is top field first, otherwise the field order is bottom field first.

One embodiment of the present invention provides a method and system for transforming a video bitstream in an interlaced format into a progressive format which can be displayed by a digital television. For example, the present embodiment utilizes the pixel information of a current field, previous field, and future field of the interlaced video bitstream to try to determine what the original content is of the missing lines of the current field. Specifically, the present embodiment utilizes different sets of pixel information in order to estimate the amount of motion that exist within a video bitstream. In this manner, the present embodiment is able to more closely determine the original value of the missing pixels of each field of the interlaced video bitstream. Therefore, the present embodiment provides a de-interlacing function enabling digital televisions to receive interlaced video bitstreams and display them in the progressive format.

A liquid crystal display apparatus which has a first display panel and a second display panel which use liquid crystal as display media, a driving circuit which scans matrix-arranged pixels of each of the panels line by line, and a controller which controls the driving circuit. The controller changes the rate of the length of a delay step Td which is inserted between scanning lines to be sequentially scanned to the length of a scanning time Tss in accordance with circumstantial temperature. Also, the way of changing the rate of Td to Tss in a single writing mode and the way of changing the rate Td to Tss in a double writing mode are different.

The invention discloses a display panel, a driving method of the display panel and a display device. An array substrate comprises a plurality of sub-pixel units and a plurality of data lines. The sub-pixel units are arrayed in the row direction and the list direction, and in the row direction, the sub-pixel units with N sorts of colors are arrayed in an alternately cyclic mode; in the list direction, the sub-pixel units of different colors are arrayed in an alternately cyclic mode. Each data line is electrically connected with the sub-pixel units of the same color, and at most one sub-pixel unit is electrically connected into each row of sub pixels. According to the array substrate, each data line is electrically connected with the sub-pixel units of the same color, the sub-pixel units of different colors are electrically connected to different data lines, hence, when the display panel including the array substrate displays full-color images, in the row-by-row scanning process of each frame of display picture, each data line only needs to provide the voltage corresponding to the sub pixels of the same color, the potential does not need to be changed all the time, and therefore the power consumption of the display panel is lowered.

A time controller with power-saving function is utilized for selecting to drive a display with progressive or interlace scan method based on if two continuous frames are dynamic. The time controller comprises an interlace scan control module, a progressive scan control module, a motion detecting circuit, a scan selecting circuit, and a data selecting circuit. The interlace scan and the progressive scan control modules are utilized for generating control signals of interlace scan and progressive scan according to a video signal, respectively. The motion detecting circuit select the control signals of interlace scan or progressive scan based on if the two continuous frames are dynamic, so as to drive the display. In this way, consumed power of the display is saved and a saw-tooth effect on the video frame is avoided.