翻訳と辞書 Words near each other ・ Sireh-ye Olya ・ Sireh-ye Sofla ・ Sireix ・ Sireköpinge Church ・ Sirel ・ Sirelda ・ Sireli Bobo ・ Sireli Ledua ・ Sireli Naqelevuki ・ Siremar ・ Sirembe Secondary School ・ Sirembo ・ Siren ・ Siren (alarm) ・ Siren (Asian Kung-Fu Generation song) ・ Siren (codec) ・ Siren (comics) ・ Siren (DC Comics) ・ Siren (genus) ・ Siren (Heather Nova album) ・ Siren (magazine) ・ Siren (Malcolm Lincoln song) ・ Siren (Millennium) ・ Siren (mythology) ・ Siren (Never Let You Go) ・ Siren (play) ・ Siren (Roxy Music album) ・ Siren (Ruby Gloom song) ・ Siren (series) ・ Siren (surname) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Siren (codec) ： ウィキペディア英語版 Siren (codec) Siren is a family of patented, transform-based, wideband audio coding formats and their audio codec implementations developed and licensed by PictureTel Corporation (acquired by Polycom, Inc. in 2001). There are three Siren codecs: Siren 7, Siren 14 and Siren 22. == Editions == Siren 7 (or Siren7 or simply Siren) provides 7 kHz audio, bit rates 16, 24, 32 kbit/s and sampling frequency 16 kHz. Siren is derived from PictureTel's PT716plus algorithm. In 1999, ITU-T approved G.722.1 recommendation, which is based on Siren 7 algorithm. It was approved after a four-year selection process involving extensive testing.〔 G.722.1 provides only bit rates 24 and 32 kbit/s and does not support Siren 7's bit rate 16 kbit/s.〔(2008-08-05) (Polycom Enables Acceleration of HD Voice Adoption by Offering Royalty-Free Codec ), Retrieved 2009-09-07〕 The algorithm of Siren 7 is identical to its successor, G.722.1, although the data formats are slightly different. Siren 14 (or Siren14) provides 14 kHz audio, bit rates 24, 32, 48 kbit/s for mono, 48, 64, 96 kbit/s for stereo and sampling frequency 32 kHz. Siren 14 supports stereo and mono audio. It offers 40 millisecond algorithmic delay, using 20 millisecond frame lengths. The mono version of Siren 14 became ITU-T G.722.1C (14 kHz, 24/32/48 kbit/s) in April 2005.〔Polycom, Inc. (2005-04-12) (ITU Approves Polycom Siren14 as New International Standard ), Retrieved 2009-09-07〕 The algorithm is based on transform technology, using a Modulated Lapped Transform (MLT). Siren 22 (or Siren22) provides 22 kHz audio, sampling frequency 48 kHz, bit rates 64, 96, 128 kbit/s stereo and 32, 48, 64 kbit/s mono. Siren 22 offers 40 millisecond algorithmic delay using 20 millisecond frame lengths. In May 2008, ITU-T approved the new G.719 full-band codec which is based on Polycom Siren 22 audio technology and Ericsson’s advanced audio techniques. 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「Siren (codec)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.