Perceptual quality evaluation of asymmetric stereo video coding for efficient 3D rate scaling

Nükhet ÖZBEK; Gizem ERTAN; Oktay KARAKUŞ

Article Details

Perceptual quality evaluation of asymmetric stereo video coding for efficient 3D rate scaling

Authors:

Nükhet ÖZBEK | Gizem ERTAN | Oktay KARAKUŞ

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2014 Vol.22 Issue 3, pp.663-678

Document Type:

Article

Publication Date:

5/2014

Document Language:

Turkish

Document ID (Org No.):

2000742998

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632

Abstract:

 

In 3D perception, the binocular suppression of the human  vision, perceiving high quality 3D video in the case of a view in higher  quality, can be exploited in asymmetric stereo video coding for efficient 3D  rate scaling. Hence, the best stereo rate-visual distortion performance may  be gained by asymmetric coding, which is the reduction of the spatial and/or  quantization resolution of the low-quality view, while keeping the  high-quality view in full resolution. However, how to determine the level of  asymmetry and what type of scaling should be chosen are still in question.  In this work, we try to assess the overall performance of the scalability  options with several test contents. The test videos are encoded at critical  bitrates with symmetric options and spatial or signal-to-noise ratio (SNR)  asymmetric coding, and are subjectively evaluated in a stereo-polarized  projection 3D display system. Two different types of evaluation  methodologies are used: the Double-Stimulus Continuous-Quality Scale (DSCQS)  and Subjective Evaluation of Stereo Video Quality (SESVIQ). Dense visual  tests show that the spatial scaling is generally inferior when compared to  SNR scaling, except that high motion scenes and symmetric SNR are more  preferable for a higher bitrate. The characteristics of the video content  should be taken into consideration for efficient stereo rate scaling.

 

In 3D perception, the binocular suppression of the human  vision, perceiving high quality 3D video in the case of a view in higher  quality, can be exploited in asymmetric stereo video coding for efficient 3D  rate scaling. Hence, the best stereo rate-visual distortion performance may  be gained by asymmetric coding, which is the reduction of the spatial and/or  quantization resolution of the low-quality view, while keeping the  high-quality view in full resolution. However, how to determine the level of  asymmetry and what type of scaling should be chosen are still in question.  In this work, we try to assess the overall performance of the scalability  options with several test contents. The test videos are encoded at critical  bitrates with symmetric options and spatial or signal-to-noise ratio (SNR)  asymmetric coding, and are subjectively evaluated in a stereo-polarized  projection 3D display system. Two different types of evaluation  methodologies are used: the Double-Stimulus Continuous-Quality Scale (DSCQS)  and Subjective Evaluation of Stereo Video Quality (SESVIQ). Dense visual  tests show that the spatial scaling is generally inferior when compared to  SNR scaling, except that high motion scenes and symmetric SNR are more  preferable for a higher bitrate. The characteristics of the video content  should be taken into consideration for efficient stereo rate scaling.

Article Details

Perceptual quality evaluation of asymmetric stereo video coding for efficient 3D rate scaling

Authors: Nükhet ÖZBEK | Gizem ERTAN | Oktay KARAKUŞ

Publisher: TUBITAK

Journal: Turkish Journal of Electrical Engineering and Computer Science 2014 Vol.22 Issue 3, pp.663-678

Document Type: Article

Publication Date: 5/2014

Document Language: Turkish

Document ID (Org No.): 2000742998

Frequency: Bimonthly

eISSN: 1303-6203

pISSN: 1300-0632

Issues

Authors:

Nükhet ÖZBEK | Gizem ERTAN | Oktay KARAKUŞ

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2014 Vol.22 Issue 3, pp.663-678

Document Type:

Article

Publication Date:

5/2014

Document Language:

Turkish

Document ID (Org No.):

2000742998

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632