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Daala on Wheels

1,721 bytes added, 03:23, 16 March 2013
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Reverted edits by Ipodsoft (talk) to last revision by Rillian
See also: [https://xiph.org/daala/ https://xiph.org/daala/]
 
== Weekly meetings ==
 
We've been having weekly progress meetings on mumble.
 
* 2012 June 4 [https://people.xiph.org/~giles/2012/daala_20120604.txt minutes] (actually a work week)
* 2012 June 22 [https://people.xiph.org/~giles/2012/daala_20120622.txt minutes]
* 2012 June 29 [https://people.xiph.org/~giles/2012/daala_20120629.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120629.opus recording]
* 2012 July 6 [https://people.xiph.org/~giles/2012/daala_20120706.txt minutes]
* 2012 July 13 [https://people.xiph.org/~giles/2012/daala_20120713.txt minutes]
* 2012 July 20 [https://people.xiph.org/~giles/2012/daala_20120720.txt minutes]
* 2012 July 27 [https://people.xiph.org/~giles/2012/daala_20120727.txt minutes]
* 2012 August 3 [https://people.xiph.org/~giles/2012/daala_20120803.txt minutes] [https://people.xiph.org/~giles/2012/daala_20120803.opus recording]
* 2012 August 10 [https://people.xiph.org/~giles/2012/daala_20120810.txt minutes]
* 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 31 - 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]
* 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]
* 20120 October 26 -
* 2012 Novemeber 2 - no meeting
* 2012 December 7 - [https://people.xiph.org/~giles/2012/daala_20121207.txt minutes]
 
= Techniques =
The discussed overall structure so far has been a variable size lapped-DCT block based codec with lapping done via pre/post filtering with a specially structured (lifting) linear phase transform along the edges along with overlapped block motion compensation and the expected trimmings. The lapping can be optimized for energy compaction and other useful properties, including invert-ability, and yields excellent results with efficient finite precision math.

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