Quality assessment metrics vs. PSNR under packet lossscenarios in manet wireless networks

Martínez-Rach, Miguel; López, Otoniel; Piñol, Pablo; Malumbres, Manuel P.; Oliver, J.; Calafate, Carlos T.

doi:10.1145/1290050.1290058

Cited by 22 publications

(20 citation statements)

References 19 publications

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“…We identify glitches as frames whose PSNR is below 20 dB [27]. Fig 10c shows that, with mobility, the conventional wireless design based on MPEG4 experiences significant glitches in video quality.…”

Section: Mobility Of a Single Receivermentioning

confidence: 99%

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SoftCast: Clean-slate scalable wireless video

Jakubczak

Katabi

2010

2010 48th Annual Allerton Conference on Communication, Control, and Computing (Allerton)

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Abstract-Video broadcast and mobile video challenge the conventional wireless design. In broadcast and mobile scenarios the bit rate supported by the channel differs across receivers and varies quickly over time. The conventional design however forces the source to pick a single bit rate and degrades sharply when the channel cannot not support the chosen bit rate.This paper presents SoftCast, a clean-slate design for wireless video where the source transmits one video stream that each receiver decodes to a video quality commensurate with its specific instantaneous channel quality. To do so, SoftCast ensures the samples of the digital video signal transmitted on the channel are linearly related to the pixels' luminance. Thus, when channel noise perturbs the transmitted signal samples, the perturbation naturally translates into approximation in the original video pixels. Hence, a receiver with a good channel (low noise) obtains a high fidelity video, and a receiver with a bad channel (high noise) obtains a low fidelity video.We implement SoftCast using the GNURadio software and the USRP platform. Results from a 20-node testbed show that SoftCast improves the average video quality (i.e., PSNR) across broadcast receivers in our testbed by up to 5.5 dB. Even for a single receiver, it eliminates video glitches caused by mobility and increases robustness to packet loss by an order of magnitude.

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Section: Mobility Of a Single Receivermentioning

confidence: 99%

“…We evaluate these schemes using the Peak Signal-to-Noise Ratio (PSNR), a standard metric of video quality [27,34]. We have the following findings:…”

Section: Introductionmentioning

confidence: 99%

SoftCast: Clean-slate scalable wireless video

Jakubczak

Katabi

2010

2010 48th Annual Allerton Conference on Communication, Control, and Computing (Allerton)

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“…There are many other factors considered by the human visual system and the brain [10]. The mean opinion score (MOS) measurements are used to evaluate the video quality.…”

Section: Testing Methodsmentioning

confidence: 99%

Eliminating the freezing frames for the mobile user over unreliable wireless networks

Aziz

Grahn

Lundberg

2009

Proceedings of the 6th International Conference on Mobile Technology, Application &Amp; Systems - Mobility '09

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The main challenge of real time video streaming over a wireless network is to provide good quality service (QoS) to the mobile viewer. However, wireless networks have a limited bandwidth that may not be able to handle the continues video frame sequence and also with the possibility that video frames could be dropped or corrupted during the transmission. This could severely affect the video quality. In this study we come up with a mechanism to eliminate the frozen video and provide a quality satisfactory for the mobile viewer. This can be done by splitting the video frames to sub-frame and transmitted over multiple channels. We will present a subjective test, the Mean Opinion Score (MOS). MOS is used to evaluate our scenarios where the users can observe three levels of frame losses for real time video streaming. The results for our technique significantly improves the indicate perceived that video quality.

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“…Since a video PSNR below 20 dB is not watchable [26], we identify glitches as frames whose PSNR is below 20 dB.…”

Section: Mobilitymentioning

confidence: 99%

“…We compare SoftCast with two baselines: 1) MPEG-4 (i.e., H.264/AVC) over 802.11, and 2) layered video where the layers are encoded using the scalable video extension to H.264 (SVC) and transmitted using hierarchical modulation as in [21]. We evaluate these schemes using the Peak Signal-to-Noise Ratio (PSNR), a standard metric of video quality [26,35]. We have the following findings:…”

Section: Introductionmentioning

confidence: 99%

SoftCast

Jakubczak

Katabi

2010

SIGCOMM Comput. Commun. Rev.

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Abstract-Video broadcast and mobile video challenge the conventional wireless design. In broadcast and mobile scenarios the bit rate supported by the channel differs across receivers and varies quickly over time. The conventional design however forces the source to pick a single bit rate and degrades sharply when the channel cannot not support the chosen bit rate. This paper presents SoftCast, a clean-slate design for wireless video where the source transmits one video stream that each receiver decodes to a video quality commensurate with its specific instantaneous channel quality. To do so, SoftCast ensures the samples of the digital video signal transmitted on the channel are linearly related to the pixels' luminance. Thus, when channel noise perturbs the transmitted signal samples, the perturbation naturally translates into approximation in the original video pixels. Hence, a receiver with a good channel (low noise) obtains a high fidelity video, and a receiver with a bad channel (high noise) obtains a low fidelity video.We implement SoftCast using the GNURadio software and the USRP platform. Results from a 20-node testbed show that SoftCast improves the average video quality (i.e., PSNR) across broadcast receivers in our testbed by up to 5.5 dB. Even for a single receiver, it eliminates video glitches caused by mobility and increases robustness to packet loss by an order of magnitude.

show abstract

Quality assessment metrics vs. PSNR under packet lossscenarios in manet wireless networks

Cited by 22 publications

References 19 publications

SoftCast: Clean-slate scalable wireless video

SoftCast: Clean-slate scalable wireless video

Eliminating the freezing frames for the mobile user over unreliable wireless networks

SoftCast

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