© 多媒体通信 Multimedia Communications 第2章 多媒体数据压缩国际标准 音频数据的压缩标准 2019年9月22日@ 甩于工程与后怎科学系
2019年9月22日 第2章 多媒体数据压缩国际标准 音频数据的压缩标准 多媒体通信 Multimedia Communications
KC第2章多媒体数据压缩国际标准 ◆2.1多媒体数据压缩编码的重要性和分类 ◆2.2常见数据压缩方法分类与基本原理 ◆2.3音频压缩标准 ▣2.3.1话音编码基础 ▣2.3.2三种话音编码器 ▣2.3.3 PEG Audio ▣2.3.4移动通信网中的音频编码 ◆2.4静态图像压缩编码的国际标准 ◆2.5视频压缩的国际标准 ◆2.6可伸缩性编码和分布式编码 ynh.cxh @ustc.edu.cn
{ynh,cxh}@ustc.edu.cn 第2章 多媒体数据压缩国际标准 2.1 多媒体数据压缩编码的重要性和分类 2.2 常见数据压缩方法分类与基本原理 2.3 音频压缩标准 2.3.1 话音编码基础 2.3.2 三种话音编码器 2.3.3 MPEG Audio 2.3.4 移动通信网中的音频编码 2.4 静态图像压缩编码的国际标准 2.5 视频压缩的国际标准 2.6 可伸缩性编码和分布式编码 2
Me History of Magnetic Tape 近半个世纪的辉煌 磁带录音机的生命周期 C10 TBOH HOTH 成长期 1960's 成熟期 导入期 1930's 19805 衰退期 3 1990's ynh.cxh @ustc.edu.cn
{ynh,cxh}@ustc.edu.cn History of Magnetic Tape 近半个世纪的辉煌 3 1960's 1930's 1990's 1980's
MC 消费电子从磁存储步入半导体存储 索尼停产卡带Walkman随身听 ②3 读图时代 告别：Sony停产卡带alknan Sony的卡带Walkman就是上个世 纪的pod。在人们还傻里傻气的抱 着纸箱子一样大的家音机在街上跳 舞时，卡带Walkman的出现让这个世 界街头音乐瞬间“旧貌换新颜”。 (图1) 这种改变波及全球，从美国的 街头沉迷其中的黑人妇女（图2)到 中国那一代年轻人把刚刚看到的浪 漫和流行浓缩进卡带（图3），那是 数字时代来临前最让人兴奋的一次 预言。 事实上，数字时代随身电子产 品的一切主要特征，几乎都可以在 当年的Walkman_上面找到：小型化、 B 都市规费■林烟 电子化、时尚感、廉价……这一切 初市林 再熟悉不过，却始于今天向我们道 wea 别的30年前的Walkman。 祝卡带Walkmanj走好，愿数字 Walkman常青。我们博物馆再见！ (图4) ONY 2010年10月25日 WALKmAN 3】 一周速递 http://star.news.sohu.com/s2010/science33
{ynh,cxh}@ustc.edu.cn 消费电子从磁存储步入半导体存储 索尼停产卡带Walkman随身听 2010年10月25日 http://star.news.sohu.com/s2010/science33/
MC History of CD-DA 20世纪最后20年：在光盘上存放数字音乐 1969:The idea of a compact disc was born in the mind of Klass Compaan,a Ducth physicist. 1975:Research on laser and optical disc technology started by Sony. 1977:Philips began researching laser and optical disc technology. 1980:CD-DA format introduced by Philips and Sony,and standards were laid down. 1982:Manufacturing of CDs began on a large scale in a factory. 1982:First ever album on a CD released by Sony,which was Billy Joel's 52nd Street. 1983:CD players and discs hit the market in the US and the rest of the world. 1987:The first Video CD(VCD)format created for storing and playing video and audio. ◆1996：DVD technology hit the world. 1997:DVD released in the market,sidelining CDs. 1999:Super Audio CD(SACD)is released by Sony and Philips. 2003:The first consumer available Blu-Ray player is released in Japan by Sony. 2008:Sales for large label CDs drops 20%due to rising popularity of MP3 audio. Development of the Compact Disc,CD-ROM,DVD and Blu-Ray http://www.voices.com/resources/articles/audig-recording-technology/cd-histortmeline
{ynh,cxh}@ustc.edu.cn History of CD-DA 20世纪最后20年：在光盘上存放数字音乐 1969: The idea of a compact disc was born in the mind of Klass Compaan, a Ducth physicist. 1975: Research on laser and optical disc technology started by Sony. 1977: Philips began researching laser and optical disc technology. 1980: CD-DA format introduced by Philips and Sony, and standards were laid down. 1982: Manufacturing of CDs began on a large scale in a factory. 1982: First ever album on a CD released by Sony, which was Billy Joel's 52nd Street. 1983: CD players and discs hit the market in the US and the rest of the world. 1987: The first Video CD (VCD) format created for storing and playing video and audio. 1996: DVD technology hit the world. 1997: DVD released in the market, sidelining CDs. 1999: Super Audio CD (SACD) is released by Sony and Philips. 2003: The first consumer available Blu-Ray player is released in Japan by Sony. 2008: Sales for large label CDs drops 20% due to rising popularity of MP3 audio. 5 Development of the Compact Disc, CD-ROM, DVD and Blu-Ray http://www.voices.com/resources/articles/audio-recording-technology/cd-history-timeline