Daala - Revision history

Gmaxwell: Reverted edits by Ipodsoft (talk) to last revision by Rillian

2013-03-16T03:23:17Z

Reverted edits by Ipodsoft (talk) to last revision by Rillian

← Older revision		Revision as of 03:23, 16 March 2013
Line 4:		Line 4:

	See also: [https://xiph.org/daala/ https://xiph.org/daala/]		See also: [https://xiph.org/daala/ https://xiph.org/daala/]
-
-
-	~~'''Source(s):''' [http://www.downloadranking.com Daala]~~
-

	== Weekly meetings ==		== Weekly meetings ==
Line 33:		Line 29:
	* 2012 Novemeber 2 - no meeting		* 2012 Novemeber 2 - no meeting
	* 2012 December 7 - [https://people.xiph.org/~giles/2012/daala_20121207.txt minutes]		* 2012 December 7 - [https://people.xiph.org/~giles/2012/daala_20121207.txt minutes]
-
-
-	~~'''Source(s):''' [http://www.downloadranking.com Daala]~~
-

	= Techniques =		= Techniques =
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	Other components which have been discussed include:		Other components which have been discussed include:
-
-
-	~~'''Source(s):''' [http://www.downloadranking.com Daala]~~
-

	==Techniques applicable to all frame types==		==Techniques applicable to all frame types==
Line 73:		Line 61:

	* Using PVQ and energy conservation: see http://jmvalin.ca/video/video_pvq_v3.pdf		* Using PVQ and energy conservation: see http://jmvalin.ca/video/video_pvq_v3.pdf
-
-
-	~~'''Source(s):''' [http://www.downloadranking.com Daala]~~
-

	==Techniques applicable to inter frames==		==Techniques applicable to inter frames==
Line 85:		Line 69:
	** Speculation has been offered that a significant part of MC inaccuracy may be due to blending in a physically incorrect (gamma-corrected) space, though no real conclusions were made. Academic papers on motion compensation accuracy seem to have ignored this issue.		** Speculation has been offered that a significant part of MC inaccuracy may be due to blending in a physically incorrect (gamma-corrected) space, though no real conclusions were made. Academic papers on motion compensation accuracy seem to have ignored this issue.
	* Timothy has an example code base for a variable partition size blocking-free motion compensation scheme which merges OBMC (overlapped block motion compensation) and CGI (control-grid interpolation) with an interesting prediction/sub-division scheme and whole-frame trellis optimization of motion vectors. (daala-exp)		* Timothy has an example code base for a variable partition size blocking-free motion compensation scheme which merges OBMC (overlapped block motion compensation) and CGI (control-grid interpolation) with an interesting prediction/sub-division scheme and whole-frame trellis optimization of motion vectors. (daala-exp)
-
-
-	~~'''Source(s):''' [http://www.downloadranking.com Daala]~~
-

	==Basic features==		==Basic features==
Line 99:		Line 79:
	* Good support for decode side droppable frames?		* Good support for decode side droppable frames?
	** Hopefully the referencing structure will be flexible enough to enable this even if it's not an intentional feature.		** Hopefully the referencing structure will be flexible enough to enable this even if it's not an intentional feature.
-
-
-	~~'''Source(s):''' [http://www.downloadranking.com Daala]~~
-

	==Frills==		==Frills==
	* Optionally storing a checksum of the expected decoded frame for decoder/encoder mismatch detection.		* Optionally storing a checksum of the expected decoded frame for decoder/encoder mismatch detection.
	* Expose the number of referential descendants of a given frame (or even the whole reference DAG) for most efficient allocation of FEC.		* Expose the number of referential descendants of a given frame (or even the whole reference DAG) for most efficient allocation of FEC.
-
-
-	~~'''Source(s):''' [http://www.downloadranking.com Daala]~~
-

	==Wingdings==		==Wingdings==
Line 136:		Line 108:
	** Predict block properties (quantizer, energy, etc.) from MV. (0,0) probably means small delta. Larger MV's may correspond to larger deltas ... although at low shutter speeds large MVs may correlate with reduced overall HF energy.		** Predict block properties (quantizer, energy, etc.) from MV. (0,0) probably means small delta. Larger MV's may correspond to larger deltas ... although at low shutter speeds large MVs may correlate with reduced overall HF energy.
	** Predict delta spectral shape from source block spectral shape. HF/LF ratio of the delta may be correlated with the same ratio in its source blocks. Works well with decode-side fDCT.		** Predict delta spectral shape from source block spectral shape. HF/LF ratio of the delta may be correlated with the same ratio in its source blocks. Works well with decode-side fDCT.
-
-
-	~~'''Source(s):''' [http://www.downloadranking.com Daala]~~
-

	==Negative results==		==Negative results==

Ipodsoft at 03:13, 16 March 2013

2013-03-16T03:13:11Z

← Older revision		Revision as of 03:13, 16 March 2013
Line 4:		Line 4:

	See also: [https://xiph.org/daala/ https://xiph.org/daala/]		See also: [https://xiph.org/daala/ https://xiph.org/daala/]
		+
		+
		+	'''Source(s):''' [http://www.downloadranking.com Daala]
		+

	== Weekly meetings ==		== Weekly meetings ==
Line 29:		Line 33:
	* 2012 Novemeber 2 - no meeting		* 2012 Novemeber 2 - no meeting
	* 2012 December 7 - [https://people.xiph.org/~giles/2012/daala_20121207.txt minutes]		* 2012 December 7 - [https://people.xiph.org/~giles/2012/daala_20121207.txt minutes]
		+
		+
		+	'''Source(s):''' [http://www.downloadranking.com Daala]
		+

	= Techniques =		= Techniques =
Line 35:		Line 43:

	Other components which have been discussed include:		Other components which have been discussed include:
		+
		+
		+	'''Source(s):''' [http://www.downloadranking.com Daala]
		+

	==Techniques applicable to all frame types==		==Techniques applicable to all frame types==
Line 61:		Line 73:

	* Using PVQ and energy conservation: see http://jmvalin.ca/video/video_pvq_v3.pdf		* Using PVQ and energy conservation: see http://jmvalin.ca/video/video_pvq_v3.pdf
		+
		+
		+	'''Source(s):''' [http://www.downloadranking.com Daala]
		+

	==Techniques applicable to inter frames==		==Techniques applicable to inter frames==
Line 69:		Line 85:
	** Speculation has been offered that a significant part of MC inaccuracy may be due to blending in a physically incorrect (gamma-corrected) space, though no real conclusions were made. Academic papers on motion compensation accuracy seem to have ignored this issue.		** Speculation has been offered that a significant part of MC inaccuracy may be due to blending in a physically incorrect (gamma-corrected) space, though no real conclusions were made. Academic papers on motion compensation accuracy seem to have ignored this issue.
	* Timothy has an example code base for a variable partition size blocking-free motion compensation scheme which merges OBMC (overlapped block motion compensation) and CGI (control-grid interpolation) with an interesting prediction/sub-division scheme and whole-frame trellis optimization of motion vectors. (daala-exp)		* Timothy has an example code base for a variable partition size blocking-free motion compensation scheme which merges OBMC (overlapped block motion compensation) and CGI (control-grid interpolation) with an interesting prediction/sub-division scheme and whole-frame trellis optimization of motion vectors. (daala-exp)
		+
		+
		+	'''Source(s):''' [http://www.downloadranking.com Daala]
		+

	==Basic features==		==Basic features==
Line 79:		Line 99:
	* Good support for decode side droppable frames?		* Good support for decode side droppable frames?
	** Hopefully the referencing structure will be flexible enough to enable this even if it's not an intentional feature.		** Hopefully the referencing structure will be flexible enough to enable this even if it's not an intentional feature.
		+
		+
		+	'''Source(s):''' [http://www.downloadranking.com Daala]
		+

	==Frills==		==Frills==
	* Optionally storing a checksum of the expected decoded frame for decoder/encoder mismatch detection.		* Optionally storing a checksum of the expected decoded frame for decoder/encoder mismatch detection.
	* Expose the number of referential descendants of a given frame (or even the whole reference DAG) for most efficient allocation of FEC.		* Expose the number of referential descendants of a given frame (or even the whole reference DAG) for most efficient allocation of FEC.
		+
		+
		+	'''Source(s):''' [http://www.downloadranking.com Daala]
		+

	==Wingdings==		==Wingdings==
Line 108:		Line 136:
	** Predict block properties (quantizer, energy, etc.) from MV. (0,0) probably means small delta. Larger MV's may correspond to larger deltas ... although at low shutter speeds large MVs may correlate with reduced overall HF energy.		** Predict block properties (quantizer, energy, etc.) from MV. (0,0) probably means small delta. Larger MV's may correspond to larger deltas ... although at low shutter speeds large MVs may correlate with reduced overall HF energy.
	** Predict delta spectral shape from source block spectral shape. HF/LF ratio of the delta may be correlated with the same ratio in its source blocks. Works well with decode-side fDCT.		** Predict delta spectral shape from source block spectral shape. HF/LF ratio of the delta may be correlated with the same ratio in its source blocks. Works well with decode-side fDCT.
		+
		+
		+	'''Source(s):''' [http://www.downloadranking.com Daala]
		+

	==Negative results==		==Negative results==

Rillian: /* Weekly meetings */ Fix date

2012-12-07T22:44:34Z

Weekly meetings: Fix date

← Older revision		Revision as of 22:44, 7 December 2012
Line 28:		Line 28:
	* 20120 October 26 -		* 20120 October 26 -
	* 2012 Novemeber 2 - no meeting		* 2012 Novemeber 2 - no meeting
-	* 2012 December 6 - [https://people.xiph.org/~giles/2012/~~daala_20121206~~.txt minutes]	+	* 2012 December 7 - [https://people.xiph.org/~giles/2012/daala_20121207.txt minutes]

	= Techniques =		= Techniques =

Rillian: /* Weekly meetings */ link to meeting summary

2012-12-07T22:43:51Z

Weekly meetings: link to meeting summary

← Older revision		Revision as of 22:43, 7 December 2012
Line 28:		Line 28:
	* 20120 October 26 -		* 20120 October 26 -
	* 2012 Novemeber 2 - no meeting		* 2012 Novemeber 2 - no meeting
		+	* 2012 December 6 - [https://people.xiph.org/~giles/2012/daala_20121206.txt minutes]

	= Techniques =		= Techniques =

Rillian: /* Weekly meetings */ I've not been making updates lately

2012-11-02T22:01:33Z

Weekly meetings: I've not been making updates lately

← Older revision		Revision as of 22:01, 2 November 2012
Line 26:		Line 26:
	* 2012 September 28 - [https://people.xiph.org/~giles/2012/daala_20120928.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120928.opus recording]		* 2012 September 28 - [https://people.xiph.org/~giles/2012/daala_20120928.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120928.opus recording]
	* 2012 October 5 - [https://people.xiph.org/~giles/2012/daala_20121005.opus recording]		* 2012 October 5 - [https://people.xiph.org/~giles/2012/daala_20121005.opus recording]
		+	* 20120 October 26 -
		+	* 2012 Novemeber 2 - no meeting

	= Techniques =		= Techniques =

Rillian: /* Weekly meetings */ Recording link for today's meeting.

2012-10-05T20:30:35Z

Weekly meetings: Recording link for today's meeting.

← Older revision		Revision as of 20:30, 5 October 2012
Line 25:		Line 25:
	* 2012 September 21 - [https://people.xiph.org/~giles/2012/daala_20120921.txt minutes]		* 2012 September 21 - [https://people.xiph.org/~giles/2012/daala_20120921.txt minutes]
	* 2012 September 28 - [https://people.xiph.org/~giles/2012/daala_20120928.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120928.opus recording]		* 2012 September 28 - [https://people.xiph.org/~giles/2012/daala_20120928.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120928.opus recording]
		+	* 2012 October 5 - [https://people.xiph.org/~giles/2012/daala_20121005.opus recording]

	= Techniques =		= Techniques =

Rillian: /* Weekly meetings */ Link to minutes and recording

2012-09-28T22:48:35Z

Weekly meetings: Link to minutes and recording

← Older revision		Revision as of 22:48, 28 September 2012
Line 24:		Line 24:
	* 2012 September 14 - no meeting		* 2012 September 14 - no meeting
	* 2012 September 21 - [https://people.xiph.org/~giles/2012/daala_20120921.txt minutes]		* 2012 September 21 - [https://people.xiph.org/~giles/2012/daala_20120921.txt minutes]
		+	* 2012 September 28 - [https://people.xiph.org/~giles/2012/daala_20120928.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120928.opus recording]

	= Techniques =		= Techniques =

Rillian: /* Weekly meetings */ Post minutes from today's meeting.

2012-09-21T20:39:09Z

Weekly meetings: Post minutes from today's meeting.

← Older revision		Revision as of 20:39, 21 September 2012
Line 22:		Line 22:
	* 2012 August 31 - no meeting		* 2012 August 31 - no meeting
	* 2012 September 7 - no meeting		* 2012 September 7 - no meeting
		+	* 2012 September 14 - no meeting
		+	* 2012 September 21 - [https://people.xiph.org/~giles/2012/daala_20120921.txt minutes]

	= Techniques =		= Techniques =

Rillian: /* Weekly meetings */ no meeting last this week: travel and Opus work

2012-09-08T17:29:48Z

Weekly meetings: no meeting last this week: travel and Opus work

← Older revision		Revision as of 17:29, 8 September 2012
Line 21:		Line 21:
	* 2012 August 24 - [https://people.xiph.org/~giles/2012/daala_20120824.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120824.opus recording]		* 2012 August 24 - [https://people.xiph.org/~giles/2012/daala_20120824.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120824.opus recording]
	* 2012 August 31 - no meeting		* 2012 August 31 - no meeting
		+	* 2012 September 7 - no meeting

	= Techniques =		= Techniques =

Rillian: /* Weekly meetings */ No meeting this week.

2012-08-31T20:08:18Z

Weekly meetings: No meeting this week.

← Older revision		Revision as of 20:08, 31 August 2012
Line 20:		Line 20:
	* 2012 August 17 - no meeting		* 2012 August 17 - no meeting
	* 2012 August 24 - [https://people.xiph.org/~giles/2012/daala_20120824.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120824.opus recording]		* 2012 August 24 - [https://people.xiph.org/~giles/2012/daala_20120824.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120824.opus recording]
		+	* 2012 August 31 - no meeting

	= Techniques =		= Techniques =