Topic
Residual frame
About: Residual frame is a research topic. Over the lifetime, 4443 publications have been published within this topic receiving 68784 citations.
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12 Jun 2007TL;DR: In this paper, an image processing method capable of improving the picture quality is presented. But the method is not suitable for displaying on a display device, as it requires the input picture signal and an input synchronizing signal which is synchronized with the input image signal.
Abstract: There is provided an image processing method capable of improving the picture quality. The image processing method comprises: incorporating input frame pictures to be displayed on a display device, on the basis of an input picture signal and an input synchronizing signal which is synchronized with the input picture signal; recording the incorporated input frame pictures in an input frame memory; and producing output frame pictures from input frame pictures, which have been recorded in the input frame memory, by producing an interpolated picture or inserting a black raster picture or thinning out the frame pictures, between input frame pictures corresponding to a picture information of the input frame picture to be displayed, on the basis of the picture information and the input synchronizing signal and an output synchronizing signal.
86 citations
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05 Apr 1991TL;DR: In this paper, a frame switching relay switches frames between input and output paths by multiplexing of the paths at frame cell level, where a frame is divided into cells having a constant number of bits, whereas the frames are of variable length.
Abstract: A frame switching relay switches frames between input and output paths by multiplexing of the paths at frame cell level. A frame is divided into cells having a constant number of bits, whereas the frames are of variable length. The switching relay only retransmits frames that have been completely written in the buffer memory. A context memory preserves the address of the first cell at the start of the writing of a frame in the buffer memory, and memorizes the address of the output path for which the frame is destined, until the frame is completely written. A checking circuit checks that the writing of the frame does not cause an "overflow" in the buffer memory, by updating the number of cells awaiting reading and respectively associated with the output paths. If there is no overflow, the address of the first cell of the frame is written in one of the address queues as a function of the destination output path address. The frame is subsequently read by incrementation of the address of the first cell until the end of the frame is detected.
86 citations
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18 Apr 2001TL;DR: In this paper, a frame erasure compensation method in a variable-rate speech coder includes quantizing, with a first encoder, a pitch lag value for a current frame and a second, predictive encoder quantizing only a second delta pitch Lag value for the previous frame.
Abstract: A frame erasure compensation method in a variable-rate speech coder includes quantizing, with a first encoder, a pitch lag value for a current frame and a first delta pitch lag value equal to the difference between the pitch lag value for the current frame and the pitch lag value for the previous frame. A second, predictive encoder quantizes only a second delta pitch lag value for the previous frame (equal to the difference between the pitch lag value for the previous frame and the pitch lag value for the frame prior to that frame). If the frame prior to the previous frame is processed as a frame erasure, the pitch lag value for the previous frame is obtained by subtracting the first delta pitch lag value from the pitch lag value for the current frame. The pitch lag value for the erasure frame is then obtained by subtracting the second delta pitch lag value from the pitch lag value for the previous frame. Additionally, a waveform interpolation method may be used to smooth discontinuities caused by changes in the coder pitch memory.
86 citations
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07 Dec 1998TL;DR: A frame rate control scheme is proposed which can dynamically adjust the number of skipped frames according to the accumulated magnitude of the motion vectors and the decoded sequence can present much smoother motion.
Abstract: This paper investigates the dynamic frame skipping strategy in video transcoding. To speed up the operation, a video transcoder usually reuses the decoded motion vectors to reencode the video sequences at a lower bit-rate. When frame skipping is allowed in a transcoder, those motion vectors can not be reused because the motion vectors of the current frame is no longer estimated from the immediate past frame. To reduce the computational complexity of motion vectors reestimation, a bilinear interpolation approach is developed to overcome this problem. Based on these interpolated motion vectors, the search range can be much reduced. Furthermore, we propose a frame rate control scheme which can dynamically adjust the number of skipped frames according to the accumulated magnitude of the motion vectors. As a result, the decoded sequence can present much smoother motion.
86 citations
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10 Dec 2008TL;DR: In this article, a decoder may apply a quality-focused frame interpolation mode to select a reference frame based on quality criteria, and display of an interpolated or extrapolated frame may be selectively enabled based on a quality analysis.
Abstract: This disclosure describes selection of reference video units to be used for interpolation or extrapolation of a video unit, such as a video frame. A decoder may apply a quality-focused mode to select a reference frame based on quality criteria. The quality criteria may indicate a level of quality likely to be produced by a reference frame. If no reference frames satisfy the quality criteria, interpolation or extrapolation may be disabled. Display of an interpolated or extrapolated frame may be selectively enabled based on a quality analysis. A decoder may apply a resource-focused frame interpolation mode to enable or disable frame interpolation or extrapolation for some frames based on power and quality considerations. In one mode, frame interpolation may be disabled to conserve power when reference frames are not likely to produce satisfactory quality. In another mode, the threshold may be adjustable as a function of power saving requirements.
86 citations