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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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Patent
Kurenai Murakami1, Tutomu Murase1
14 Sep 1990
TL;DR: In this paper, a frame aligner for frame aligning an input time-division multiplexed (TDM) signal to an output frame synchronous signal is proposed, where an input frame signal of the TDM signal is separated into a transport overhead carrying a message pointer and a subframe carrying data signal.
Abstract: In a frame aligner for frame aligning an input time-division multiplexed (TDM) signal to an output frame synchronous signal, an input frame signal of the TDM signal is separated into a transport overhead carrying an input frame synchronous signal and a message pointer and a subframe carrying data signal. A fresh overhead having a fresh pointer is made corresponding to a phase difference between said input and said output frame synchronous signals and said subframe is sequentially written into and read from a buffer memory. The fresh overhead and the subframe read are multiplexed to form an output TDM frame signal which is synchronized with the output frame synchronous signal. The buffer memory is permitted to have a reduced memory capacity storable a number of channel signals equal to that of time slots carrying the overhead. When the input frame signal is asynchronous with an output clock signal, the input frame signal is converted to a converted frame signal which is synchronized with the output clock signal before the frame alignment is performed.

27 citations

Patent
28 Jun 2001
TL;DR: In this article, a system and method for detecting discontinuous transmission (DTX) frames is proposed, which includes the steps of receiving data transmitted in a plurality of frames; classifying each of the frames; analyzing the classification of a number of successive frames of the received data and determining, in response to the metric, if a frame is a discontinuous frame.
Abstract: A system and method for detecting discontinuous transmission (DTX) frames The inventive method includes the steps of receiving data transmitted in a plurality of frames; classifying each of the frames; analyzing the classification of a number of successive frames of the received data and providing a metric with respect thereto; and determining, in response to the metric, if a frame is a discontinuous frame In the illustrative embodiment, the step of classifying includes the step of error checking the frames using a cyclic redundancy check (CRC) error checking protocol The received frames are classified as good frames (G), erasure frames (E), or discontinuous frames (D) A numerical value is assigned to each of the frames based on the classification thereof Next, the frames are filtered to provide an output Yn=Yn−1+Xn where ‘n’ is a frame number, Yn is the filter output for a given frame n, Yn−1 is the filter output for a previous frame, and Xn is a stream of input frames A threshold is set for the output Yn to facilitate the detection of discontinuous frames That is, a detection of a discontinuous transmission frame is indicated when a frame is classified as an ‘erasure’ and the filter output exceeds the threshold On the detection of a discontinuous frame, the classification of the frame is changed from ‘erasure’ to ‘discontinuous’ By reclassifying improperly classified erasure frames, the mobile receiver is inhibited from requesting retransmission of the frames or a change in the transmit power level Consequently, network throughput and capacity are optimized and system power is conserved

27 citations

Patent
Hiroki Furukawa1
29 Sep 1999
TL;DR: In this paper, an analog-digital converter for converting a plurality of transfer frames from an analog signal format into a digital signal format based on a clock signal having a fixed frequency and for outputting the first transfer frame is described.
Abstract: A digital audio broadcasting receiver includes: an analog-digital converter for converting a plurality of transfer frames from an analog signal format into a digital signal format based on a clock signal having a fixed frequency and for outputting the first transfer frame; a demodulator for demodulating the first transfer frame from a first frame processing start position for the first transfer frame; an audio decoder for generating audio data containing a plurality of audio samples based on the data symbol contained in the first transfer frame which has been demodulated by the demodulator; a transfer path characteristics calculator for generating a transfer path characteristics signal representing transfer path characteristics based on the reference symbol contained in the first transfer frame which has been demodulated by the demodulator; and a frame processing start position control section for controlling a second frame processing start position for the second transfer frame, by outputting to the demodulator a position control signal representing a difference between a predetermined frame processing reference start position and the first frame processing start position for the first transfer frame based on the transfer path characteristics signal, so that the second frame processing start position for the second transfer frame coincides with the predetermined frame processing reference start position.

27 citations

Patent
14 Apr 2005
TL;DR: In this paper, motion estimation between a current noisy frame and a previous noise-reduced frame is performed to generate motion vectors indicating relative motion between the pixels in the current noise frame and the corresponding pixels in a previous noisy frame.
Abstract: A method of reducing noise in a sequence of digital video frames is performed by motion estimation between a current noisy frame and a previous noise-reduced frame, to generate motion vectors indicating relative motion between the pixels in the current noisy frame and the corresponding pixels in the previous noise-reduced frame; and removing noise from the current noisy frame by computing the weighted average of pixels in the current noise frame and the corresponding pixels in the previous noise-reduced frame based on the motion vectors, to generate a noise-reduced output frame.

27 citations

Patent
09 Dec 1991
TL;DR: In this article, a method for fluoroscopically observing a living creature with reduced x-ray dosage is usable with a video monitor for displaying frames of image samples received during respective ones of frame scan intervals that regularly and successively occur at a display frame rate sufficiently high that brightness flicker is acceptably low to a human observer.
Abstract: A method for fluoroscopically observing a living creature with reduced x-ray dosage is usable with a video monitor for displaying frames of image samples received during respective ones of frame scan intervals that regularly and successively occur at a display frame rate sufficiently high that brightness flicker is acceptably low to a human observer; an x-ray source that can be gated on for intervals not as long as a display frame; a fluoroscopic camera, including a raster-scanning video camera and a x-ray-to-light conversion apparatus with persistence not appreciably longer than a display frame; and frame filling apparatus for grabbing frames of image samples and interpolating between successively grabbed frames of image samples, when necessary, to generate frames of image samples at said display frame rate During ones of said successive frame scan intervals, x-ray radiation is directed from the gated x-ray source through the living creature; the x-ray shadow of at least a portion of the living creature is viewed with the fluoroscopic camera; and the frame filling apparatus grabs frames of image samples from the raster-scanning video camera to be stored in frame stores and used as bases from which to compute fill frames of image samples The frame filling apparatus continuously supplies to the video monitor the frames of image samples it generates at display frame rate

27 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202313
202223
20217
20204
20196
201811