Papers by Abdulkareem Ibrahim
In this paper, an investigation of the effects of group of pictures on H.264 multiview video codi... more In this paper, an investigation of the effects of group of pictures on H.264 multiview video coding content over an error prone environment with varying packet loss rates is presented. We analyse the bitrate performance for different GOP and error rates to see the effects on the quality of the reconstructed multiview video. However, by analysing the multiview video content it is possible to identify an optimum GOP size depending on the type of application used. A comparison is demonstrated for the performances between widely known H.264 data partitioning error resilience technique and multi-layer data partitioning technique with different error rates and GOP in terms of their perceived quality. Our simulation results turned out that Multi-layer data partitioning technique shows a better performance at higher error rates with different GOP. Further experiments in this work have shown the effects of GOP in terms of visual quality and bitrate for different multiview video sequences.
Implementation of error resilience technique for Multiview Video Coding
Multimedia content over broadband wireless technology has always been a challenge in video commun... more Multimedia content over broadband wireless technology has always been a challenge in video communication, as wireless networks are inevitably prone to error burst. In this work, we present an approach in data partition technique to achieve error resilience in Multiview Video Coding (MVC). Data partitioning (DP) is an efficient and important way to make an encoded video stream more robust to errors by way of separating more important and less important syntax elements into a different format of packets, based on decoding importance, thereby enhancing improvement of error/loss robustness. As JMVC 8.5 reference software does not support data partitioning or any other error resilience technique for either base or non-base view slices, the proposed technique implemented introduces new non base view Network Abstraction Layer (NAL) units into the multiview video (MVV) bitstream. This concept helps to differentiate the data partitions of base view slices from non-base view slices. DP algorithm was developed to sort the individual video data into different partitions, namely, A, B, and C based on importance. The overall bitrate increase was found to be 0.7% and this overhead did not affect the overall quality of the video. The JMVC 8.5 reference software decoder on the other hand was modified to handle and decode the partitioned MVV bitstream. The technique presented can decode and reconstruct all frames in the MVV bitstream with minimum bitrate and exact quality as the original sequences.
this paper presents an error resilience and concealment technique in Multiview video coding. The ... more this paper presents an error resilience and concealment technique in Multiview video coding. The work in this paper is aimed at making the Multiview video bitstream more robust to packet loss and improves the quality of the reconstructed video. Although error resilience in Multiview video coding has been an active research field, part of the motivation of this work is to employ data partitioning and simple frame copy error concealment in H.264/AVC and implement the two techniques into the Joint Multiview Video Coding (JMVC 8.5) reference software. This work is an attempt to illustrate the performance of the techniques implemented in the JMVC reference software in error prone channels while also maintaining an acceptable perceptual quality. The results obtained have demonstrated a considerable gain in the video quality over non-resilient coder. Thus, the technique employed gives a good performance over a packet loss network.
Implementation of error resilience technique for Multiview Video Coding
2014 Southwest Symposium on Image Analysis and Interpretation, 2014
Multimedia content over broadband wireless technology has always been a challenge in video commun... more Multimedia content over broadband wireless technology has always been a challenge in video communication, as wireless networks are inevitably prone to error burst. In this work, we present an approach in data partition technique to achieve error resilience in Multiview Video Coding (MVC). Data partitioning (DP) is an efficient and important way to make an encoded video stream more robust to errors by way of separating more important and less important syntax elements into a different format of packets, based on decoding importance, thereby enhancing improvement of error/loss robustness. As JMVC 8.5 reference software does not support data partitioning or any other error resilience technique for either base or non-base view slices, the proposed technique implemented introduces new non base view Network Abstraction Layer (NAL) units into the multiview video (MVV) bitstream. This concept helps to differentiate the data partitions of base view slices from non-base view slices. DP algorithm was developed to sort the individual video data into different partitions, namely, A, B, and C based on importance. The overall bitrate increase was found to be 0.7% and this overhead did not affect the overall quality of the video. The JMVC 8.5 reference software decoder on the other hand was modified to handle and decode the partitioned MVV bitstream. The technique presented can decode and reconstruct all frames in the MVV bitstream with minimum bitrate and exact quality as the original sequences.
Urology & Nephrology Open Access Journal, 2017
Introduction:Spontaneous bladder rupture (SBR) is a rare surgical emergency that occurs mostly in... more Introduction:Spontaneous bladder rupture (SBR) is a rare surgical emergency that occurs mostly in men with infravesical obstruction in presence of pathological bladder. Delayed and misdiagnosis of such clinical condition may lead to high morbidity and mortality rates. We herein present two cases with SBR. Case presentation:The first case is a 54 year old male presented with peritonitis and high creatinine level. This patient was misdiagnosed as perforated viscus but exploration revealed intraperitoneal bladder rupture which was secondary to prolonged infravesical obstruction (urethral stricture). The Second case was a 65 year old female that was referred from a peripheral hospital comatosed, desaturated and intubated. Patient had intraperitoneal bladder perforationand urinary ascites that was diagnosed by non-contrast CT cystogram. On exploration Bladder was contracted and inflamed that may be the underlying cause of SBR. Conclusion:SBR is a devastating and life threatening clinical condition. It is usually difficult to recognize preoperatively, so it has to be kept in mind among other causes of acute peritonitis.
Turkish journal of urology, 2016
Peyronie's disease (PD) is an inflammatory condition of penile tunica albuginea which commonl... more Peyronie's disease (PD) is an inflammatory condition of penile tunica albuginea which commonly ends with penile curvature and difficulty in vaginal penetration. Unfortunately, the pathophysiology of PD has not been completely understood. In this paper, we will review what is known about the pathophysiology of PD and the nonsurgical medical treatment options that have been trialed as a result. In the last 5 years, commonly used oral medications left their places to intralesional therapies. Clostridium collagenase, which is the only Food and Drug Administration (FDA) approved treatment for PD, is now the most prescribed intralesional therapy in the last years. Clostridium collagenase is advised for patients whose penile curvature is > 30° and < 90°. Because of its side effects, patients should be counseled before intralesional Clostridium collagenase treatment. Until finding best treatment solution for PD, more investigations in regards to the basic science of PD need to be ...
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Papers by Abdulkareem Ibrahim