案例研究:从林肯中心直播

林肯中心 is the world's leading performing arts center. 位于16号.在纽约有3英亩, the 林肯中心 complex comprises 12 resident organizations, including 林肯中心 for the Performing Arts; The Juilliard School; The Metropolitan Opera; New York City Ballet; New York Philharmonic; New York City Opera; School of American Ballet; Film Society of 林肯中心; Jazz at 林肯中心; 林肯中心 Theater; Chamber Music Society of 林肯中心; and The New York Public Library for the Performing Arts. 在一起, 这12个机构将上演数千场演出, 教育项目, 旅游, 以及每年在林肯中心校园举行的其他活动.

As the chief technology officer of the 林肯中心 for the Performing Arts-the organization responsible for numerous aspects managing 林肯中心 facilities, as well as being the world's leading presenter of programming-I am responsible for ensuring that the 林肯中心 is supported by state-of-the-art technology at a level of excellence commensurate with the caliber of events that we host. One of our technology centerpieces is the full HD production environment at the 林肯中心's Alice Tully Hall. A key component of our HD capabilities is live and on-demand HD encoding and streaming using Digital Rapids' StreamZHD.

配备了四个机器人高清摄像机, Alice Tully Hall is linked to the facility's data center through a single-mode fiber infrastructure. Communication Specialties' FiberLink product is used to interface the fiber infrastructure with HD/SDI signals. 数据中心是我们高清业务的枢纽, 安置我们的高清服务器, 路由器, 编码器, 及其他相关设备. 在这里, a StreamZHD system receives source content over HD/SDI and encodes it for live or on-demand external distribution. Resulting on-demand files are hosted for audience distribution in our own streaming environment; live streams are typically distributed through CDN services from Incited Media, 根据观众规模.

林肯中心's streaming capabilities recently supported the worldwide debut performances of 拉勒米计划:十年后, the epilogue to the acclaimed Tectonic Theater Project play. An onstage preshow event was streamed through StreamZHD to audiences in theaters worldwide. 更多的 than 150 theaters across all 50 states and 14 countries-reaching audiences as far away as China-watched live or time-shifted streams of the preshow speeches and introductions. Streaming was then suspended as live readings of the new play were performed at each theater, with the original cast delivering the 林肯中心 performance. Following the performance, streaming from 林肯中心 resumed with
一个实时的、互动的Q&一个会话. Questions were submitted through Twitter, with answers streamed to the participating theaters.

Streams were provided in three different bitrates for maximum audience accessibility and encoded in the H.264压缩格式，通过adobeflash观看. 我们选择Flash平台是因为它无处不在, with its deep market penetration and as its accessibility across multiple operating systems. 除了三个并发的直播, we also simultaneously created three equivalent file-based archives. In addition to allowing us the option of making them available on-demand at a later date, these archive files supported the time-shifting requirements of those theaters (mostly in different time zones) that chose to hold their performances later in the day rather than simultaneously. Files of the preshow event were uploaded to a server by FTP during the live performance and downloaded by the theaters for their subsequent presentations; similarly, 节目后的文件Q&A是通过FTP分发的. The StreamZHD system produced all six outputs (three live and three archived) simultaneously
实时地.

The Digital Rapids StreamZHD installed in a rack at 林肯中心. StreamZHD was recommended to us by our systems integrator, HB通信, and installed as part of our overall HD deployment by a team. 我们在建立这个项目时考虑到了复制和预算. We didn't want to create monolithic infrastructure or workflow that we couldn't sustain and reuse for other projects within our operational budget, 无论是在人力方面还是在技术方面.

The ability to stream at HD quality over the internet is phenomenal. Our streaming of the Laramie event was very well-received, and we look forward to using StreamZHD to support future events. High-definition streaming and our HD production capabilities are key benefits for artists, 表演者, and groups holding events in Alice Tully Hall at 林肯中心, 而StreamZHD是实现这一目标的重要组成部分.