Bit reduction based matching criterion for motion compensation in video coding...
Predictive Perceptual Compression for Real Time Video Communication Oleg Komogortsev , perceptual video compression and bit-rate reduction Categories and Subject Descriptors H43 , system controls the spatio-temporal resolution of the video, based on the collected data The eye-tracker tracks the eye-gaze with...
Attention-based video streaming , A foveation-based HVS model plays an important role in the algorithm , the source and channel video transmission rates and the target video coding bit rate ....
image or video at considerably low bit rates with good quality However, the quality and mode-dependent decisions inside the , Temporal masking in video coding refers to the reduction in the perception of distortion (or signal) in the presence of , involve a foveation model [11], [12], especially for video coding Because of the nature of ....
Real-Time Foveation Techniques for Low Bit Rate Video Coding Hamid R Sheikh, Brian L Evans and Alan C Bovik , based video coding techniques for low bit rate video coding, such as the H263 or MPEG-4 , III Foveation Model for Video Coding A Foveation Cut-off Frequency Model The Contrast Sensitivity Function (CSF) ....
Adaptive Foveation of MPEG Video T H Reeves Department of Systems Design Engineering University of Waterloo , be either network-based as shown, or colocated with the video source, but the essential elements of the model are , The use of bit rate reduction methods (a) and (b), inde-...
Our emerging technologies installation demonstrates these techniques running live in a head-mounted display and we will compare them against our new perceptually-based foveated techniqu Our new foveation techniques enable significant reduction in rendering cost ,...
Another approach for foveated rendering is to render content in a space that matches the smoothly varying reduction in resolution of our visual acuity, based on a nonlinear mapping of the screen distance from the visual fixation point This method gives two main benefits...
Section 2 gives the literature survey Section 3 multilayer bit allocation for video encoding Section 4 experimental results , CONCLUSION AND FUTURE WORK The conventional novel video coder bit allocation technique based on visual distortion sensitivity analysis used to reduce the bit rate , The visibility given by the foveation model ....
Aug 24, 2010· A scene of an image sequence is compressed using a number of foveation zones, each foveation zone being weighted based on a probability of a viewer looking at a ,...
Abstract PhDSpace-variant picture coding techniques exploit the strong spatial non-uniformity of\ud the human visual system in order to increase coding efficiency in terms of perceived quality\ud per bit...
Shizhong Liu's 12 research works with 352 citations and 151 reads, including: Digital Video Transcoding Shizhong Liu has expertise in Computer Science and Psychology...
The proposed foveation embedded DCT domain video transcoding can reduce the bit rate without compromising visual quality or achieve better subjective quality for a given bit rate by shaping the compression distortion according to the foveated contrast sensitivity function of the HVS...
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Shizhong Liu's 12 research works with 352 citations and 151 reads, including: Digital Video Transcoding Shizhong Liu has expertise in Computer Science and Psychology...
Nvidia can reduce VR graphics processing requirements by up to 3 tim , Nvidia's perceptually based foveation leaves imagery on the side blurry , And despite this kind of reduction in ....
US7499594B2 - Multi-resolution predictive foveation for bandwidth reduction of moving images - Google Patents Multi-resolution predictive foveation for bandwidth reduction ,...
perceptually-based spatialchromatic foveation metric is derived , allowing for real time processing of images/videos for GCDs with degraded spatial and chromatic details on the periphery , in which the contrast modulation introduced by bit-depth reduction is not perceivable by a human observer while the bit...
In this paper, we introduce the concept of game attention model (GAM), which is basically a game context-based visual attention model, as a means for reducing the bit rate of the streaming video ,...
Although phase-aligned rendering is more expensive to compute than traditional foveation under the same level of acuity reduction, we can still yield a net savings by pushing foveation to more aggressive levels that would otherwise have yielded too many artifacts...
foveation pro le is carefully designed to match that of the typical HVS characteristics, based on experiments with human subjects, and simple statistical modeling for viewing geometry This basis in physiology distinguishes foveated coding from region-of-interest coding, in...
Video enthusiasts will appreciate cinema-like quality video thanks to ultra HD premium capture with richer color New architecture for 14-bit image signal processing, with support for up to: , Adreno Foveation: multiple technology advancements for multi-view, tile-based foveation with eye-tracking and fine grain preemption;...
Snapdragon 845's camera features also include deep portrait, multi-frame noise reduction, 30 percent power reduction for video, depth based face recognition, accelerated image stabilization, and more...
If you play this video on a device that can handle a 7MB/s data rate, the playback of the video will be _____ 20; choppy If a video frame with pixel aspect ratio 09 is displayed on a device using pixel aspect ratio of 12, the image will be _____...
Foveated imaging is a digital image processing technique in which the image resolution, , the potential reduction in display information can be substantial Also, foveation encoding may be applied to the image before other types of image compression are applied and therefore can result in a multiplicative reduction...
DCT based foveation fllter is used to reduce complexity for detecting foveation , spond to only moving edge blocks the slight degradation of video quality is ofiset by the bit savings obtained Therefore, the overall rate-distortion performance 4x4 DCT Moving edge Detection (MED) Reduction block for false moving edge (RFME) Moving edge ....
MULTILAYER BIT ALLOCATION FOR VIDEO ENCODING , A video coding bit-rate allocation technique based on visual sensitivity analysis, directs the video coder to assign few bits to regions that , In Foveation Model human observes the video picture to identify the regions where the video compression mechanism can to be applied It consists of two ....
If you play this video on a device that can handle a 7MB/s data rate, the playback of the video will be _____ 20; choppy If a video frame with pixel aspect ratio 09 is displayed on a device using pixel aspect ratio of 12, the image will be _____...
We investigated the effects of contact lenses in broadening and improving the high-foveation-quality field in a subject with infantile nystagmus syndrome (INS) A high-speed, digitized video system was used for the eye-movement recording The subject was asked to fixate a far target at different ....
BINARY ENCODING: CONTEXT-BASED ADAPTABLE SCANNING ORDER OF WDR In this coding technique, called context-based adaptive wavelet difference reduction (CAWDR), the scanning order adaptation of wavelet difference reduction is based on statistical context modeling of ,...