@inproceedings{Allison:2021ss,
	abstract = {VESA DSC and VDC-M (https://vesa.org/vesa-display-compression-codecs/) are in widespread usage in millions of display systems. This rollout was preceded by extensive and targeted subjective quality assessment to validate predictions of codec quality and visually lossless behaviour. In this talk, we will overview the assessment activities to date and their extension to applications in immersive displays. Our focus will be on subjective testing at York University using the ISO 29170-2 Appendix A protocol (1).
In the ISO 29170-2 `flicker paradigm', the test and reference are presented side-by-side on the display (Figure 1). The test consists of the compressed image temporally interleaved (alternating) with the uncompressed version at a fixed frequency (typically 5 Hz). In the reference sequence, the uncompressed image alternates with itself. Participants view the test and reference sequences side by side and are asked to identify the compressed image (i.e., which image sequence contained flicker). We have also developed and implemented modified versions of the protocol to evaluate moving and stereoscopic displays. This testing has proceeded in discrete stages including:
* Validation of visually lossless performance in a wide range of representative image samples
* Confirmation of visually lossless performance in chroma subsampled images and moving content
* Assessment of compression performance with high-dynamic range content
* Assessment of compression performance with stereoscopic 3D content
* Assessment of the effects of chromatic aberration correction on codec performance
Testing has focused on challenging test cases to optimize the effort and benefit of time-consuming subjective assessment studies. Generally, both DSC and VDC-M have met expectations for visually lossless performance over a wide variety of content and use cases. Flicker testing is a highly conservative test procedure and codec performance in real world scenarios is expected to exceed that found under the harsher conditions of flicker testing. 
},
	address = {Seoul, Korea},
	annote = { IMID 2021, which will be held at COEX in Seoul, Korea from August 25 to 27, 2021, },
	author = {Robert S. Allison and Laurie M. Wilcox},
	booktitle = {21st International Meeting on Information Display, IMID 2021 Digest},
	date-added = {2021-09-06 09:27:35 -0400},
	date-modified = {2021-09-16 08:50:08 -0400},
	keywords = {Stereopsis},
	month = {08},
	pages = {29},
	title = {Subjective Quality Assessment of VESA Display Stream Compression Codecs},
	url = {https://upload.congkong.net/imid2021/imid2021-e-proceedings.pdf},
	year = {2021},
	url-1 = {https://upload.congkong.net/imid2021/imid2021-e-proceedings.pdf}}

{"_id":"PEFSqXEsW6N3NRBL4","bibbaseid":"allison-wilcox-subjectivequalityassessmentofvesadisplaystreamcompressioncodecs-2021","author_short":["Allison, R. S.","Wilcox, L. M."],"bibdata":{"bibtype":"inproceedings","type":"inproceedings","abstract":"VESA DSC and VDC-M (https://vesa.org/vesa-display-compression-codecs/) are in widespread usage in millions of display systems. This rollout was preceded by extensive and targeted subjective quality assessment to validate predictions of codec quality and visually lossless behaviour. In this talk, we will overview the assessment activities to date and their extension to applications in immersive displays. Our focus will be on subjective testing at York University using the ISO 29170-2 Appendix A protocol (1). In the ISO 29170-2 `flicker paradigm', the test and reference are presented side-by-side on the display (Figure 1). The test consists of the compressed image temporally interleaved (alternating) with the uncompressed version at a fixed frequency (typically 5 Hz). In the reference sequence, the uncompressed image alternates with itself. Participants view the test and reference sequences side by side and are asked to identify the compressed image (i.e., which image sequence contained flicker). We have also developed and implemented modified versions of the protocol to evaluate moving and stereoscopic displays. This testing has proceeded in discrete stages including: * Validation of visually lossless performance in a wide range of representative image samples * Confirmation of visually lossless performance in chroma subsampled images and moving content * Assessment of compression performance with high-dynamic range content * Assessment of compression performance with stereoscopic 3D content * Assessment of the effects of chromatic aberration correction on codec performance Testing has focused on challenging test cases to optimize the effort and benefit of time-consuming subjective assessment studies. Generally, both DSC and VDC-M have met expectations for visually lossless performance over a wide variety of content and use cases. Flicker testing is a highly conservative test procedure and codec performance in real world scenarios is expected to exceed that found under the harsher conditions of flicker testing. ","address":"Seoul, Korea","annote":"IMID 2021, which will be held at COEX in Seoul, Korea from August 25 to 27, 2021, ","author":[{"firstnames":["Robert","S."],"propositions":[],"lastnames":["Allison"],"suffixes":[]},{"firstnames":["Laurie","M."],"propositions":[],"lastnames":["Wilcox"],"suffixes":[]}],"booktitle":"21st International Meeting on Information Display, IMID 2021 Digest","date-added":"2021-09-06 09:27:35 -0400","date-modified":"2021-09-16 08:50:08 -0400","keywords":"Stereopsis","month":"08","pages":"29","title":"Subjective Quality Assessment of VESA Display Stream Compression Codecs","url":"https://upload.congkong.net/imid2021/imid2021-e-proceedings.pdf","year":"2021","url-1":"https://upload.congkong.net/imid2021/imid2021-e-proceedings.pdf","bibtex":"@inproceedings{Allison:2021ss,\n\tabstract = {VESA DSC and VDC-M (https://vesa.org/vesa-display-compression-codecs/) are in widespread usage in millions of display systems. This rollout was preceded by extensive and targeted subjective quality assessment to validate predictions of codec quality and visually lossless behaviour. In this talk, we will overview the assessment activities to date and their extension to applications in immersive displays. Our focus will be on subjective testing at York University using the ISO 29170-2 Appendix A protocol (1).\nIn the ISO 29170-2 `flicker paradigm', the test and reference are presented side-by-side on the display (Figure 1). The test consists of the compressed image temporally interleaved (alternating) with the uncompressed version at a fixed frequency (typically 5 Hz). In the reference sequence, the uncompressed image alternates with itself. Participants view the test and reference sequences side by side and are asked to identify the compressed image (i.e., which image sequence contained flicker). We have also developed and implemented modified versions of the protocol to evaluate moving and stereoscopic displays. This testing has proceeded in discrete stages including:\n* Validation of visually lossless performance in a wide range of representative image samples\n* Confirmation of visually lossless performance in chroma subsampled images and moving content\n* Assessment of compression performance with high-dynamic range content\n* Assessment of compression performance with stereoscopic 3D content\n* Assessment of the effects of chromatic aberration correction on codec performance\nTesting has focused on challenging test cases to optimize the effort and benefit of time-consuming subjective assessment studies. Generally, both DSC and VDC-M have met expectations for visually lossless performance over a wide variety of content and use cases. 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