ET系列H.264编码/转码器包括:

• • ET-100: 1RU 高, 最多2个频道
• • ET-400: 4RU 高, 最多10个频道

特 点

• • 支持MPEG-4 AVC /H.264 Main Profile和 Baseline Profile
• • 支持High Efficiency Advanced Audio Coding (HE-AAC)
• • 支持基于WEB的远程管理。
• • 将模拟A/V信号或SDI数字信号编码成 H.264 视频及 AAC 音频
• • 将从文档, ASI口, 或以太网口来的MPEG-2 转码成 H.264 视频及 AAC 音频
• • 输入
  » A/V analog (BNC for video ; AES for audio), SDI(BNC), ASI(BNC), 以太网(UDP over IP), 文档
• • 输出
  » 10/100 Mbps以太网(UDP over IP), 文档, ASI(BNC)
• • 分辨率
  » 720x576, 704x480, 640x480, 352x288, 320x240, 176x144, 160x144
• • H.264视频压缩
  » 格式
       Main profile @L3
       Baseline profile @L3
  » 码率控制
       CBR 或 VBR
  » 灵活的GOP
       I, B, P 结构
       可变的M和N，M和N的自适应决策
  » 四分之一像素精度的大运动估计和搜索
  » 可设置的去噪音过滤
  » 错误隐藏和恢复
• • 音频编码
  
  » AAC, MPEG-2 L2/L3
  » 采样率: 8KHz, 32KHz, 44.1KHz and 48KHz
  » 码率： 8Kbps 到128Kbps
  » 位长: 16 bit, 20 bit, 24 bits

一般在互联网上的视频服务都是以点播为主, 节目源大多是以离线方式制作, 广播方式的节目不多, 而且广播节目源要不是事先录好的, 就是把实时节目先解码成模拟信号, 再以採集卡採集模拟信号, 再压缩成WM9格式. 这个过程会造成信号失真, 品质下降.



AVIVA的TX9是一台1U高, 实时把多路MPEG-2流转码成多路WM9流的转码器. MPEG-2流经由千兆以太网输入, TX9可以同时把多路MPEG-2流转码成多路WM9流, 再将这些流推送到微软媒体服务器, 媒体服务器把这些流以单播方式发出, 所有的用户就可以用PC或机顶盒来同时选择播放这些节目. TX9也可以把转好的WM9码流储存到本地的储存器上, 作为点播节目源. 高端的TX9款式可以把高清的MPEG-2转成高清的WM9.

TX9系列转码器, 根据不同的配置, 可以支持同时多路转码.目前推出的TX9-1可以支持同时1路转码, TX9-2可以支持同时2路转码, TX9-4可以支持同时4路转码.近期内会推出TX9-A可以直接把卫星信号接入, 做QPSK解調, MPEG-2解复用, 再选择4路来转码成WM9格式, 作实时播出或存在储存器中, 这个机型就省掉了外接卫星接收机及外接解复用器.对於更高数量的转码应用, TX9-X可以在7U高的机箱里支持同时40路转码, 达到节省空间, 集中管理, 冗馀备份的运营商级的优点.


          配置介面显式3路转码


          Media Server 设立4个Live(实时)节目流


          用户从Windows Media Player输入某个流的IP地址来选择广播节目


          从Windows Media Player看400Kbps D1分辩率的实时广播节目

Aviva VEG-400 is designed to reduce the cost and complexity of transporting and distributing video streams over existing IP network infrastructure. It provides a seamless processing platform for a wide variety of video over IP applications over diverse streaming protocols. In addition, VEG-400 offers an integrated Java-based management interface that provides operators a systematic view in managing the video sessions.

The Custom-built Carrier-Grade Streaming Solution
Using advanced MPEG processing ASIC, VEG-400 delivers high-density real-time MPEG-2/4 video processing solution. Each compact 4RU VEG-400 can encode or transcode/transrate up to 10 simultaneous MPEG streams.

Load Balancing and Redundancy
The VEG-400 also supports load balancing and Ethernet redundancy when multiple Ethernet ports are configured.

Aviva VEG-400 is designed for a wide variety of encoding and IP-based video applications and services. These include real-time encode analog video into MPEG-2 or MPEG-4 files or IP streams, real-time transcode MPEG-2 file or stream into MPEG-4 file or stream at a reduced bit-rate while maintaining the same quality, real-time IP video multicast, video content distribution over public networks (WAN), real-time re-broadcast of satellite programs over ADSL broadband networks.

Features	Benefits
Complete hardware-based MPEG processing; Transport: unicast or multicast of MPEG-2 or MPEG-4 video/audio over MPEG-2 Transport Stream	10 channels in 4 RU compact system Low jitter and low latency Synchronized audio and video Very high video quality and performance Compliance: ISO/IEC-1117-2, ISO/IEC-13818-2, ISO/IEC-14496-2 Support for MPEG-1, MPEG-2 MP@ML MPEG-4 Advanced Simple Profile MPEG-4 AVC will be supported in the future
Dynamically programmable frame rates, bit rates, resolution and low delay mode	Constant or variable bit rate from 64kbps to 15Mbps Horizontal resolution between 128 and 720 pixels in 16-pixel steps Vertical resolution between 80 and 480 pixels (NTSC) or 576 pixels (PAL) in 16-pixel steps Programmable GOP structure and length: I, IP, IBP and IBBP
IP-based QoS and Traffic management	Maximizing limited edge bandwidth Guaranteeing reliable and timely delivery of video packets over imperfect networks without retransmission IP unicast and multicast
Inputs	A/V, S-video, Ethernet
Load Balancing and Ethernet Redundancy	Automatic load balancing of traffic and redundancy if multiple Ethernet ports are installed
Real-time Configuring and Monitoring	Java-based GUI interface Very flexible configuration Application-level visibility into traffic utilization