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Daala is a video coding format and accompanying reference codec implementation under development by the Xiph.Org Foundation and main sponsor Mozilla Corporation under the lead of Timothy B. Terriberry.〔 Among three dozens of other contributors there are also engineers from Google, Inc. and Cisco Systems. The name is taken from the female fictional character of Admiral Natasi Daala from the Star Wars universe. The reference implementation is written in C and published, together with its source code, as free software under the terms of a BSD-like license. Software patents are being filed for techniques used in and developed for Daala. Those patents are freely licensed to everybody to use for any purpose.〔 However the patent holders reserve the right to use them to counter patent infringement lawsuits filed by others. Since June 20, 2013, the development is accompanied by a series of irregularly published posts on the underlying technology on the website of the Xiph.Org Foundation.〔〔〔 The Daala project is one of the collaborators in the IETF's NETVC project. ==Design goals== Daala is aimed to be a suitable proposal for a new video coding standard for the Internet and real-time applications. Therefore, it is meant to be usable free from patent licensing constraints and to be openly documented to enable widespread adoption.〔 Also, it is being designed to cover a broad spectrum of use cases. Daala is projected to eventually perform competitive or superior in comparison to other modern formats. The developers want to rely less on incremental improvements on traditional design principles. They are observed to show decreasing returns after many years of exploitation or tend to come with growing increases in complexity. (All widely adopted designs to date share the same basic design that dates back to H.261 from two decades ago.)〔 Instead, the higher risk of researching and trying new basic techniques is expected to yield more new and potentially more rewarding algorithms. The approach is also thought to be of advantage in order to avoid infringing on existing software patents. Moreover, possibilities for parallel processing are considered and hardware support〔 is being pursued. Daala is intended to be a high-efficiency video coding format for use cases similar to those of High Efficiency Video Coding (HEVC or H.265) and VP9.〔 It has been stated that the performance goal is to be a generation beyond HEVC and VP9, though.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Daala」の詳細全文を読む スポンサード リンク
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